WO2025145641A1 - Neck-worn device and wearable device - Google Patents

Abstract

Provided is a neck-worn device, comprising: a shell, arranged around a channel for providing a wearing space; a mainboard, located inside the shell; an audio component, located inside the shell; and a first camera, located inside the shell. The first camera is electrically connected to the audio component by means of the mainboard; the shell has a first hollow hole; the first hollow hole exposes at least part of the first camera; and the first hollow hole is located on the side of the shell close to the channel.

Description

Neck-worn devices and wearables Technical Field

The present disclosure relates to the field of display technology, and in particular to a neck-mounted device and a wearable apparatus.

Background Art

Extended Reality (XR) technology is a general term for a variety of immersive technologies including Virtual Reality (VR), Augmented Reality (AR), and Mixed Reality (MR). It combines computer technology with wearable devices to create an environment that blends the real and virtual, realizes human-computer interaction, and can bring more convenience and innovation to people's lives and work.

The above information disclosed in this section is only for understanding the background of the inventive concept of the present disclosure and therefore the above information may contain information that does not constitute the prior art.

Summary of the invention

In one aspect, a neck-worn device is provided, comprising:

A shell, the shell being arranged around a hole for providing a wearing space;

A mainboard, located inside the housing;

an audio component located inside the housing; and

A first camera, located inside the housing;

Among them, the first camera is electrically connected to the audio component through the mainboard, the shell has a first hollow hole, the first hollow hole exposes at least a part of the first camera, and the first hollow hole is located on a side of the shell close to the channel.

According to some exemplary embodiments, the shell includes a hanging area located on one side of the channel along the first direction, and the neck-mounted device includes at least two of the first cameras, and at least two of the cameras are respectively located on both sides of the channel along the second direction, and the second direction is perpendicular to the first direction.

According to some exemplary embodiments, the neck-mounted device further includes at least two microphones located in the shell, the at least two microphones are respectively located on both sides of the hole along the second direction, and the microphones are electrically connected to the audio component through the mainboard.

According to some exemplary embodiments, the neck-mounted device comprises at least two of the audio components, and the two audio components are located on both sides of the channel along the second direction; and

In at least one of the audio components, at least one microphone is disposed on a side of the audio component close to the suspension area, and at least one microphone is disposed on a side of the audio component away from the suspension area.

According to some exemplary embodiments, in at least one of the audio components, the number of microphones located on a side of the audio component close to the suspension area is less than the number of microphones located on a side of the audio component away from the suspension area.

According to some exemplary embodiments, at least two of the first cameras are symmetrically distributed on both sides of the hole along the second direction; and/or,

At least two of the microphones are symmetrically distributed on two sides of the hole along the second direction.

According to some exemplary embodiments, the shell has a first recessed portion, the first recessed portion is recessed toward the inner side of the shell, and the first hollow hole is located in the first recessed portion.

According to some exemplary embodiments, the first camera includes an infrared camera, and the neck-mounted device also includes a filter, which covers the first hollow hole, and the filter absorbs green light and blue light and allows red light and infrared light to pass through.

According to some exemplary embodiments, the neck-mounted device also includes a plurality of second cameras located within the shell, the plurality of second cameras are arranged at intervals along a circumferential direction of the shell, and the shooting fields of view of two adjacent second cameras partially overlap, and the shell includes a plurality of second hollow holes, and the plurality of second hollow holes expose at least a portion of the plurality of second cameras.

According to some exemplary embodiments, the housing has an opening, and two ends of the housing are located on both sides of the opening along the second direction; and

The multiple second cameras include two first sub-cameras and multiple second sub-cameras, the two first sub-cameras are respectively located on both sides of the opening along the second direction, and the multiple second sub-cameras are located between the two first sub-cameras and are spaced apart along the circumferential direction of the shell;

The spacing between two adjacent second sub-cameras is substantially equal to the spacing between another two adjacent second sub-cameras, and/or the spacing between two adjacent second sub-cameras is substantially equal to the spacing between the first sub-camera and the adjacent second sub-camera.

According to some exemplary embodiments, the principal optical axes of two adjacent second sub-cameras intersect, and/or the principal optical axis of the first sub-camera intersects with the principal optical axis of the adjacent second sub-camera.

According to some exemplary embodiments, the angle between the main optical axes of two adjacent second sub-cameras is The angles between the main optical axes of the other two adjacent second sub-cameras are basically equal, and/or the angle between the main optical axes of the two adjacent second sub-cameras and the angle between the main optical axes of the first sub-camera and the adjacent second sub-camera are basically equal.

According to some exemplary embodiments, directions of main optical axes of the two first sub-cameras are substantially parallel.

According to some exemplary embodiments, the second hollow hole exposing the second sub-camera is located on a side of the shell away from the hole; and/or the second hollow hole exposing the first sub-camera is located on a side of the shell close to the opening.

According to some exemplary embodiments, imaging planes of at least two of the second cameras are substantially parallel to the same straight line, and/or horizontal field of view directions of at least two of the second cameras are substantially perpendicular to the same straight line.

According to some exemplary embodiments, the neck-mounted device also includes a third camera, which is located in the shell and electrically connected to the main board, the shell has a third hollow hole, the third hollow hole exposes at least a portion of the third camera, the third camera is arranged adjacent to the first sub-camera, and the main optical axis of the third camera forms a preset angle with the main optical axis of the first sub-camera.

According to some exemplary embodiments, the neck-mounted device also includes two third cameras, and the two third cameras are arranged adjacent to the two first sub-cameras, respectively. In the adjacent third cameras and the first sub-cameras, the field of view of the third camera partially overlaps with the shooting field of view of the first sub-camera.

According to some exemplary embodiments, a plane defined by a principal optical axis of one of the third cameras and a principal optical axis of an adjacent first sub-camera is substantially parallel to a plane defined by a principal optical axis of another of the third cameras and a principal optical axis of an adjacent first sub-camera; and/or,

The main optical axis of the third camera forms an acute angle with the main optical axis of the adjacent first sub-camera.

According to some exemplary embodiments, the neck-worn device further includes a heat dissipation component, wherein the heat dissipation component is located on a side of the mainboard away from the hole, the heat dissipation component includes a heat dissipation fan, and the heat dissipation fan is configured to discharge air in a direction away from the mainboard. A plurality of air inlet hollow portions arranged at intervals are provided on the side of the shell close to the hole, and a plurality of air outlet hollow portions arranged at intervals are provided on the side of the shell away from the hole.

According to some exemplary embodiments, a size of the air inlet hollow portion is larger than a size of the air outlet hollow portion.

According to some exemplary embodiments, the plurality of air outlet hollow portions are located at a position on the heat dissipation component away from the On one side of the main board, a side of the shell close to the hole has a wind shield, the wind shield is located on the side of the main board close to the hole, and the multiple air inlet hollow parts are arranged around the wind shield.

According to some exemplary embodiments, the plurality of air inlet hollow portions are located on one side of the wind shield portion along the second direction and are spaced apart in a direction close to the opening.

According to some exemplary embodiments, the hollow shape of the air inlet hollow portion includes a long strip, and in the multiple air inlet hollow portions located between the wind shield portion and the opening, the extension direction of the air inlet hollow portion forms an acute angle with the extension direction of the opening toward the wind shield portion.

According to some exemplary embodiments, the plurality of air inlet hollow portions include a first air inlet portion and a second air inlet portion, the first air inlet portion is located between the second air inlet portion and the wind shield portion, and the distribution density of the air inlet hollow portions in the first air inlet portion is less than the distribution density of the air inlet hollow portions in the second air inlet portion.

In yet another aspect, there is provided a neck-worn device comprising:

A shell, the shell is arranged around and has a hole located in the middle of the shell;

A mainboard, located inside the housing; and

A plurality of second cameras are located inside the housing, and the second cameras are electrically connected to the mainboard;

Among them, the multiple second cameras are spaced apart along the circumferential direction of the shell, the shooting fields of two adjacent second cameras partially overlap, and the shell has a plurality of second hollow holes, and the plurality of second hollow holes expose at least a portion of the plurality of second cameras.

On the other hand, a wearable device is provided, comprising a neck-mounted device as described in any of the above items.

BRIEF DESCRIPTION OF THE DRAWINGS

Features and advantages of the present disclosure will become more apparent by describing in detail exemplary embodiments of the present disclosure with reference to the accompanying drawings.

FIG1 schematically shows a wearing diagram of a wearable device according to some embodiments of the present disclosure.

FIG2 schematically shows an external structure diagram of a neck-mounted device at a viewing angle according to some embodiments of the present disclosure.

FIG3 schematically shows an external structure diagram of a neck-mounted device according to some embodiments of the present disclosure at another viewing angle.

FIG4 schematically shows a structural diagram of an audio component of a neck-mounted device according to some embodiments of the present disclosure.

FIG5 schematically shows an exploded view of a neck-mounted device according to some embodiments of the present disclosure.

6A and 6B schematically illustrate structural diagrams of a second shell tail end portion on one side of a neck-mounted device according to some embodiments of the present disclosure.

7A and 7B schematically illustrate structural diagrams of a second shell tail end portion on the other side of a neck-mounted device according to some embodiments of the present disclosure.

FIG8 schematically shows an exploded view of a first shell of a neck-mounted device according to some embodiments of the present disclosure.

FIG9 schematically shows a structural diagram of an audio component of a neck-mounted device according to some embodiments of the present disclosure.

FIG10 schematically shows an internal structure diagram of a first shell of a neck-mounted device according to some embodiments of the present disclosure.

FIG11 schematically shows a distribution structure diagram of a second camera of a neck-mounted device according to some embodiments of the present disclosure.

FIG12 schematically shows a combined diagram of the shooting field of view of the second camera of the neck-mounted device according to some embodiments of the present disclosure.

FIG13 schematically shows a schematic diagram of the shooting principle of a camera of a neck-mounted device according to some embodiments of the present disclosure.

Figure 14A schematically shows a combined diagram of the shooting field of view of the third camera of the neck-mounted device according to some embodiments of the present disclosure.

Figure 14B schematically shows a combined diagram of the shooting fields of view of the third camera and the first sub-camera of the neck-mounted device according to some embodiments of the present disclosure.

15A and 15B schematically illustrate exploded views of a neck pad assembly of a neck-mounted device according to some embodiments of the present disclosure.

16A and 16B schematically illustrate exploded views of a second housing body portion of a neck-mounted device according to some embodiments of the present disclosure.

FIG. 17 schematically illustrates an exploded view of a heat dissipation assembly of a neck-worn device according to some embodiments of the present disclosure.

FIG18 schematically illustrates a heat dissipation principle diagram of a heat dissipation assembly of a neck-worn device according to some embodiments of the present disclosure.

FIG19 schematically shows a main structural block diagram of a wearable device according to some embodiments of the present disclosure.

FIG20 schematically shows a main flow chart of a positioning method according to some embodiments of the present disclosure.

Figure 21 schematically shows a flowchart of the steps of obtaining the relative positioning of the head-mounted device and the neck-mounted device of the wearable device based on the first inertial navigation data and image data of the wearable device according to some embodiments of the present disclosure.

FIG22 schematically shows a main flow chart of a sound playing method according to some embodiments of the present disclosure.

DETAILED DESCRIPTION

In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

It should be noted that in the drawings, the size and relative size of the elements may be exaggerated for the purpose of clarity and/or description. Thus, the size and relative size of each element are not necessarily limited to the size and relative size shown in the drawings. In the specification and drawings, the same or similar reference numerals indicate the same or similar parts.

When an element is described as being "on" another element, "connected to" another element or "coupled to" another element, the element may be directly on the other element, directly connected to the other element or directly coupled to the other element, or there may be an intermediate element. However, when an element is described as being "directly on" another element, "directly connected to" another element or "directly coupled to" another element, there is no intermediate element. Other terms and/or expressions used to describe the relationship between elements should be interpreted in a similar manner, for example, "between..." versus "directly between...", "adjacent" versus "directly adjacent" or "on..." versus "directly on...", etc. In addition, the term "connection" may refer to a physical connection, an electrical connection, a communication connection and/or a fluid connection. In addition, the X-axis, the Y-axis and the Z-axis are not limited to the three axes of a rectangular coordinate system, and may be interpreted in a broader sense. For example, the X-axis, the Y-axis and the Z-axis may be perpendicular to each other, or may represent different directions that are not perpendicular to each other. For the purpose of this disclosure, "at least one of X, Y, and Z" and "at least one selected from the group consisting of X, Y, and Z" may be interpreted as only X, only Y, only Z, or any combination of two or more of X, Y, and Z such as XYZ, XY, YZ, and XZ. As used herein, the term "and/or" includes any and all combinations of one or more of the listed associated items.

It should be noted that, although the terms "first", "second", etc. may be used herein to describe various components, structures, The terms "parts, components, elements, regions, layers and/or parts" and "parts, components, members, elements, regions, layers and/or parts" are used herein, but these parts, components, elements, regions, layers and/or parts should not be limited by these terms. Instead, these terms are used to distinguish one part, component, element, region, layer and/or part from another. Thus, for example, the first part, first member, first element, first region, first layer and/or first part discussed below can be referred to as the second part, second member, second element, second region, second layer and/or second part without departing from the teachings of the present disclosure.

For ease of description, spatial relational terms, such as "upper", "lower", "left", "right", etc., may be used herein to describe the relationship of one element or feature to another element or feature as shown in the figure. It should be understood that the spatial relational terms are intended to cover other different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the figure is turned upside down, elements described as "below" or "beneath" other elements or features will be oriented "above" or "above" the other elements or features.

As used herein, the terms "substantially," "about," "approximately," "roughly," and other similar terms are used as terms of approximation rather than as terms of degree, and they are intended to account for the inherent deviations in measured or calculated values that would be recognized by one of ordinary skill in the art. Taking into account factors such as process fluctuations, measurement problems, and errors associated with the measurement of a particular quantity (i.e., limitations of the measurement system), "about" or "approximately" as used herein include the stated value and mean that the particular value is within an acceptable range of deviation as determined by one of ordinary skill in the art. For example, "approximately" can mean within one or more standard deviations, or within ±30%, ±20%, ±10%, ±5% of the stated value.

The inventor has found through research that when users use VR/AR/MR devices to watch movies or play games, the display system provides an immersive feeling, but the current audio can only support two-channel surround sound, resulting in a weak sense of presence, and users also expect to experience an immersive 3D sound field. When the movements and behaviors of the audience users change, the orientation of the sound source in the virtual reality has changed for the user, but the orientation of the sound source reproduced in the audio playback device worn by the audience users, such as (headphones), has not changed accordingly, which greatly affects the immersive feeling created by the virtual picture and reduces the user experience. In addition, whether it is in-ear headphones or headphones, long-term wearing can easily affect the user's listening ability, after all, it is a relatively closed sound environment. The hazards of in-ear headphones are relatively more obvious, and wearing too frequently can easily induce problems such as ear canal inflammation. Wearing earphones for a long time will make it uncomfortable and even cause ear canal inflammation, while wearing wrapped headphones in summer will easily cause stuffiness and sweating. In view of the above situation, split wearable devices have emerged, which are composed of a head display and a neckband, where images are displayed on the head display and sounds are played by the speakers on the neckband. In split devices, since the positions of the speakers and the wearer's ears are no longer relatively fixed, the problem of how to accurately locate the two arises.

FIG1 schematically shows a wearing diagram of a wearable device according to some embodiments of the present disclosure.

1 , the wearable device includes a head-mounted device 10 and a neck-mounted device 20, which are electrically connected. The head-mounted device 10 is worn on the user's face, and the neck-mounted device 20 is worn on the user's neck. The neck-mounted device 20 may be provided with components such as a motherboard 22 and a battery, thereby reducing the volume and weight of the head-mounted device 10 to improve the wearing comfort of the wearable device. The neck-mounted device 20 may be detachably connected to the head-mounted device 10 via a magnetic wire, so that the neck-mounted device 20 can supply power to the head-mounted device 10 and transmit signals.

It should be noted that the electrical connection between the head-mounted device 10 and the neck-mounted device 20 means that signals can be transmitted between the head-mounted device 10 and the neck-mounted device 20, for example, power signals, communication signals, control signals, etc. can be transmitted.

It should also be noted that the split wearable device according to the embodiment of the present disclosure may include smart glasses with AR, VR, and MR display functions; it may also include devices without display functions, such as head massage devices, which in some scenarios also require soothing stereo music to make people feel more relaxed during massage.

FIG2 schematically shows an external structural diagram of a neck-mounted device according to some embodiments of the present disclosure at one viewing angle. FIG3 schematically shows an external structural diagram of a neck-mounted device according to some embodiments of the present disclosure at another viewing angle. Among them, FIG2 and FIG3 respectively illustrate structural diagrams observed from different viewing angles.

With reference to FIG. 2 and FIG. 3 , the neck-worn device has a shell 21, and the shell 21 is arranged around a hole 21A for providing a wearing space. The shell 21 is a hollow structure, and various corresponding functional components are arranged in the internal accommodating cavity of the shell 21, as described below. The shell 21 includes a hanging area 21B, and the hanging area 21B should be understood as an area for hanging on the user's neck, that is, when the user wears the neck-worn device, the hanging area 21B of the shell 21 is roughly located at the back of the user's neck, and the user's neck is located in the hole 21A. In order to more clearly describe the relevant structure of the neck-worn device, the direction of the hanging area 21B relative to the hole 21A is defined as the first direction X, that is, the hanging area 21B is located on one side of the hole 21A along the first direction X.

FIG4 schematically shows a structural diagram of an audio component of a neck-mounted device according to some embodiments of the present disclosure.

2 and 4, an audio component 23 is disposed in the housing 21, so that the neck-mounted device has the function of playing audio. The audio component 23 is electrically connected to a mainboard 22 located in the housing 21, and the mainboard 22 can be located at the suspension area 21B of the housing 21. A chip is disposed on the mainboard 22, so that the audio component 23 can be controlled to play the desired audio.

The neck-worn device further includes a first camera 241 located in the housing 21, and the first camera 241 is electrically connected to the audio component 23 through the mainboard 22. The housing 21 is provided with a first hollow hole 251, and the first hollow hole 251 exposes At least a part of the first camera 241 is exposed, and the first hollow hole 251 is located on the side of the shell 21 close to the hole 21A. The first camera 241 can shoot toward the outside of the shell 21 and toward the side of the hole 21A through the first hollow hole 251. When the user wears the neck-worn device, the first camera 241 can obtain the user's ear position information and send the ear position information to the motherboard 22. The motherboard 22 adjusts the audio curve of the audio data source signal according to the ear position information to obtain an audio data playback signal. The audio component 23 plays audio according to the audio data playback signal, which can enhance the sense of direction and space of the sound and the interaction with the environment, bringing a richer and more realistic auditory experience to the user.

According to some exemplary embodiments, the graphics captured by the first camera 241 are transmitted to the mainboard 22 by means of wireless technology or the like. The wireless technology may be selected from Bluetooth technology, wireless serial port, WiFi, or wireless network communication technology that complies with the 5G WiFi communication protocol to ensure data transmission rate and data throughput.

According to some exemplary embodiments, the communication between the first camera 241 and the mainboard 22 may also be achieved through a connecting line.

According to some exemplary embodiments, obtaining the user's ear position information may include: obtaining the position relationship of the head-mounted device relative to the first camera 241 through the image captured by the first camera 241, taking the first camera 241 as the origin, the three-dimensional coordinates of the head-mounted device in the camera coordinate system can be obtained, the installation position of the first camera 241 on the neck-mounted device is known, and then the three-dimensional coordinates of the neck-mounted device in the coordinate system of the first camera 241 can be obtained, and the position relationship between the head-mounted device and the neck-mounted device is obtained through the coordinate system of the first camera 241. The position of the audio component in the neck-mounted device is fixed, and the relative position of the head-mounted device and the user's ear is fixed. The mainboard can then obtain the relative positioning of the audio component and the ear based on the relative positioning of the head-mounted device and the neck-mounted device. Figure 5 schematically shows an exploded view of a neck-mounted device according to some embodiments of the present disclosure.

2 and 5, the housing 21 includes a first housing 211 and a second housing 212, and the first housing 211 and the second housing 212 are connected to form a receiving cavity. The first housing 211 is located on the side of the second housing 212 away from the hole 21A, that is, when worn, the side of the second housing 212 is closer to the user's neck. The first hollow hole 251 is located on the second housing 212. The first camera 241 can shoot in the direction of the user's ear through the first hollow hole 251 located on the second housing 212.

5 , the second shell 212 includes a second shell body 2121 and two second shell tail end portions 2122. The first shell body 2121 is roughly U-shaped. The two second shell tail end portions 2122 are respectively located at the two ends of the second shell body 2121. The two second shell tail end portions 2122 are respectively connected to the two ends of the first shell 211. The second shell body 2121 is connected to the remaining part of the first shell 211. First hollow hole 251 is located on the rear end portion 2122 of the second shell. For example, the first hollow hole 251 is located on the side of the rear end portion 2122 of the second shell close to the second shell main body 2121. Setting the first hollow hole 251 at this position is more conducive to the first camera 241 obtaining human ear position information.

2 and 4 , the neck-worn device includes two first cameras 241, which are respectively located on both sides of the hole 21A along the second direction Y. The first direction X is substantially perpendicular to the second direction Y, so that when the user wears the neck-worn assembly, the two first cameras 241 are substantially located below the left and right ears of the user. The two first cameras 241 can be used to obtain position information of the left and right ears of the user, respectively.

The second housing 212 is provided with two first hollow holes 251, and the two first cameras 241 respectively shoot at the positions of the left ear and the right ear of the user through the two first hollow holes 251, so that the position information of the left ear and the right ear of the user can be respectively identified. The two first hollow holes 251 are respectively located on both sides of the channel 21A along the second direction Y, for example, one first hollow hole 251 is located on the rear end portion 2122 of one second housing, and the other first hollow hole 251 is located on the rear end portion 2122 of the other second housing.

According to some exemplary embodiments, in combination with reference to Figures 2 and 4, the two first cameras 241 are roughly symmetrically distributed on both sides of the channel 21A along the second direction Y, that is, the two first hollow holes 251 are roughly symmetrically distributed on both sides of the channel 21A along the second direction Y. Such a configuration is conducive to more accurately obtaining the user's ear position information based on the images respectively taken by the two first cameras 241, and at the same time can simplify the algorithm for obtaining the user's ear position information through the images taken by the first camera 241.

Figures 6A and 6B schematically illustrate the structure of the second shell tail end portion on one side of the neck-mounted device according to some embodiments of the present disclosure. Figures 6A and 6B respectively illustrate the structure viewed from different directions, and Figures 6A and 6B illustrate the second shell tail end portion on one side and the related structure installed on the second shell tail end portion. For a clearer illustration, the state where the related structure is installed before the second shell tail end portion is illustrated.

6A and 6B , a first hollow hole 251 is provided on the rear end portion 2122 of the second shell. For the convenience of description, the second shell rear end portion 2122 is referred to as the left shell rear end portion, which is located on the left side of the user when worn. A reserved bone position 241a for installing the first camera 241 is provided on the inner wall of the left shell rear end portion at the first hollow hole 251. The camera fixing cover 241b presses the first camera 241 into the reserved bone position 241a and locks it with the left shell rear end portion by screws, thereby fixing the first camera 241 to the inner wall of the left shell rear end portion and allowing shooting to the outside of the shell through the first hollow hole 251.

Figures 7A and 7B schematically illustrate the structure of the second shell tail end portion on the other side of the neck-mounted device according to some embodiments of the present disclosure. Figures 7A and 7B respectively illustrate the structure viewed from different directions, and Figures 7A and 7B illustrate the second shell tail end portion on the other side and the related structure installed on the second shell tail end portion. For a clearer illustration, the state where the related structure is installed before the second shell tail end portion is illustrated.

With reference to FIGS. 7A and 7B , a first hollow hole 251 is provided on the rear end portion 2122 of the second shell. For the convenience of description, the rear end portion 2122 of the second shell is referred to as the right shell rear end portion, which is located on the right side of the user when worn. A reserved bone position 241a for installing the first camera 241 is provided on the inner wall of the rear end portion of the right shell at the first hollow hole 251. The camera fixing cover 241b presses the first camera 241 into the reserved bone position 241a and locks it with the rear end portion of the right shell by screws, thereby fixing the first camera 241 to the inner wall of the rear end portion of the right shell and allowing shooting to the outside of the shell through the first hollow hole 251.

According to some exemplary embodiments, the material of the camera fixing cover 241b includes a metal material, for example, the material of the camera fixing cover 241b may include aluminum, and the side of the first camera 241 that contacts the camera fixing cover 241b is coated with heat dissipating silicone, so that the first camera 241 can be well cooled.

According to some exemplary embodiments, referring to FIG. 6A or FIG. 7A , a first protective cover plate 244 is provided at the first hollow hole 251 . The first protective cover plate 244 is located on the outer wall of the second shell rear end portion 2122 and covers the first hollow hole 251 for protecting the first camera 241 .

According to some exemplary embodiments, with reference to FIG6A and FIG6B , the first camera 241 may be an infrared camera, the first protective cover 244 may allow infrared light and red light to pass through and absorb green light and blue light, and the first protective cover 244 may filter out other low-wavelength visible light interference, thereby simplifying the algorithm for obtaining human ear position information through the photographed photos. For example, the material of the first protective cover 244 includes acrylic.

According to some exemplary embodiments, an infrared fill light may be further provided on the side of the first hollow hole 251 for emitting infrared light when the first camera 241 is shooting, thereby improving the shooting clarity.

According to some exemplary embodiments, with reference to FIG. 6A and FIG. 6B , a first recessed portion 247a is provided on the outer wall of the second shell rear end portion 2122, the first recessed portion 247a is recessed toward the inside of the shell 21, the bottom of the first recessed portion 247a has a first groove 247b, a first hollow hole 251 is provided at the bottom of the first groove 247b, the shape of the first groove 247b matches the shape of the first protective cover 244, and the first protective cover 244 can be fixed in the first groove 247b by double-sided tape. An infrared fill light can be provided in the first groove 247b and located on the side of the first hollow hole 251. A first camera provided at the first hollow hole 251 241 is used to photograph the user's ears. When the field of view direction required by the first camera 241 does not match the curvature of the area where the first hollow hole 251 is set in the rear end portion 2122 of the second shell, a first recessed portion 247a can be formed in the area where the first hollow hole 251 needs to be set. In this way, the orientation of the first hollow hole 251 can be adjusted so that the orientation of the first hollow hole 251 matches the field of view direction of the first camera 241, that is, the radial direction of the first hollow hole 251 is roughly perpendicular to the main optical axis direction of the first camera 241, thereby effectively avoiding the problem of the first hollow hole 251 blocking the shooting field of view of the first camera 241 without increasing the size of the first hollow hole 251.

Fig. 8 schematically shows an exploded view of a first shell of a neck-mounted device according to some embodiments of the present disclosure, wherein Fig. 8 schematically shows the structure of the first shell and various components mounted on the first shell.

According to some exemplary embodiments, in combination with reference to Figures 4 and 8, the neck-worn component includes two audio components 23, the two audio components 23 are respectively located on both sides of the channel 21A along the second direction Y, and the two audio components 23 are roughly symmetrically distributed along the second direction Y, the two audio components 23 are respectively electrically connected to the main board 22 through two audio driver boards 234, the main board 22 transmits the processed audio data playback signal to the audio driver board 234, the audio driver board 234 decodes the signal after receiving it and outputs it to the audio component 23, thereby realizing sound output.

For example, the two audio driving boards 234 may be respectively located at one side of the two audio components 23 away from the suspension area 21B, and the audio driving boards 234 may be fixed to the first shell 211 by screws.

FIG9 schematically shows a structural diagram of an audio component of a neck-mounted device according to some embodiments of the present disclosure.

According to some exemplary embodiments, with reference to FIGS. 8 and 9 , the audio component 23 may include at least two speakers 231, and the four corners of the audio component 23 are fixed to the stepped columns on the inner wall of the first housing 211 by shock-absorbing silicone 233, thereby avoiding the problem of resonance and other noises caused by the hard connection between the audio component 23 and the housing 21. In the audio component 23, a speaker 231 with relatively large power can be selected.

According to some exemplary embodiments, with reference to FIGS. 8 and 9 , the audio component may further include at least one passive membrane 232, which is located between the two speakers 231. The passive membrane 232 has a similar structure to the speaker 231, with a diaphragm for pushing air and a folding ring for returning the diaphragm to a normal position. The passive membrane 232 is mainly used to enhance the bass, and can enhance the bass effect by increasing the vibration area and lowering the resonance frequency without increasing the size of the speaker 231, thereby better meeting the demand for low-frequency dive.

According to some exemplary embodiments, referring to FIG. 4 , the neck-worn device further includes a microphone 26, which is located in the housing 21 and electrically connected to the mainboard 22. On the one hand, the microphone 26 can be used to identify the user's password. This can enrich the interaction with the user. On the other hand, when the user makes a sound, the microphone 26 can also be used to identify the user's sound position information, that is, to obtain the orientation of the user's head. The sound position information can be used together with the human ear position information as a basis for optimizing the audio curve, which is conducive to further enhancing the user's auditory experience.

Fig. 10 schematically shows an internal structure diagram of a first shell of a neck-mounted device according to some embodiments of the present disclosure. Fig. 10 schematically shows the first shell and related structures installed on the first shell, and for a clearer illustration, the state in which the related structures are installed in front of the first shell is shown.

According to some exemplary embodiments, in combination with reference to Figures 4 and 10, the neck-mounted device includes a plurality of microphones 26, and the plurality of microphones 26 are respectively located on both sides of the hole 21A along the second direction Y. For example, the microphones 26 located on both sides of the hole 21A are roughly symmetrically distributed along the second direction Y, which is conducive to more accurately obtaining the orientation of the user's head based on the sound information respectively obtained by the plurality of microphones 26, and at the same time can simplify the algorithm for obtaining the orientation of the user's head through the sound information obtained by the microphone 26.

It should be noted that FIG. 4 only schematically shows the microphone 26 located on one side of the hole 21A (the microphone located on the left side of the user when worn), and the microphone 26 located on one side of the hole 21A can be set in the same way.

According to some exemplary embodiments, with reference to FIG. 2 and FIG. 4 , a plurality of microphones 26 may be provided on one side of the hole 21A along the second direction Y, at least one microphone 26 being provided on the side of the audio component 23 close to the suspension area 21B (i.e., the side closer to the back of the user's head when worn), and at least one microphone 26 being provided on the side of the audio component 23 away from the suspension area 21B (i.e., the side closer to the user's face when worn). With such a configuration, the user's voice position information may be more effectively identified. It should be noted that the microphone 26 provided on the other side of the hole 21A along the second direction Y is provided in the same manner and will not be described in detail herein.

According to some exemplary embodiments, considering that the user is in a state of looking straight ahead more often when wearing the neck-mounted device, a larger number of microphones 26 may be provided on the side of the audio component 23 away from the suspension area 21B. For example, one microphone 26 may be provided on the side of the audio component 23 close to the suspension area 21B, and two microphones 26 may be provided on the side of the audio component 23 away from the suspension area 21B.

With reference to Figures 2, 4 and 6B, among the multiple microphones 26 located on one side of the channel 21A along the second direction Y, the microphone 26 farthest from the suspension area 21B is installed on the rear end of the left shell. In order to avoid the problem of distortion or noise caused by sound leakage of the microphone 26, the microphone 26 can be assembled in the microphone sealing silicone 261, and then the two can be installed together in the reserved groove 26a on the inner wall of the rear end of the left shell. The microphone sealing silicone 261 seals the sound cavity of the microphone 26, thereby avoiding the problem of sound leakage.

With reference to Figures 2, 4 and 7B, among the multiple microphones 26 located on the other side of the channel 21A along the second direction Y, the microphone 26 farthest from the suspension area 21B is installed on the rear end portion of the right shell. In order to avoid the problem of distortion or noise caused by sound leakage of the microphone 26, the microphone 26 can be assembled in the microphone sealing silicone 261, and then the two can be installed together in the reserved groove on the inner wall of the rear end portion of the right shell.

4 and 10 , two microphones 26 located at the two audio components 23 respectively close to the suspension area 21B are arranged on the first shell 211, and two microphones 26 located at the two audio components 23 respectively away from the suspension area 21B and adjacent to the two audio components 23 are arranged on the first shell 211. These four microphones 26 are first assembled in the microphone sealing silicone 261, and then further installed in the reserved grooves on the inner wall of the first shell 211.

Fig. 11 schematically shows a distribution structure diagram of a second camera of a neck-mounted device according to some embodiments of the present disclosure. Fig. 12 schematically shows a combined view diagram of a shooting field of view of a second camera of a neck-mounted device according to some embodiments of the present disclosure.

According to some exemplary embodiments, in combination with reference to Figures 2, 10 and 11, the neck-mounted device also includes a plurality of second cameras 242 located in the shell 21. The plurality of second cameras 242 are distributed at intervals along the circumferential direction of the shell 21. The shell 21 includes a plurality of second hollow holes 252. A second hollow hole 252 exposes at least a portion of a second camera 242. The second camera 242 is used to capture images around the neck-mounted device through the second hollow hole 252. The second camera 242 is electrically connected to the motherboard 22. The second camera 242 transmits the captured image information data to the motherboard 22. The motherboard 22 converts the captured image information data into graphic data after calculation and outputs it to the user, so that the user can experience a personal God's perspective and can also enhance the user's immersion in the corresponding audio-visual entertainment and games.

According to some exemplary embodiments, with reference to FIG. 11 and FIG. 12 , the shooting fields of two adjacent second cameras 242 partially overlap, that is, a 360° panoramic shooting of the surroundings of the neck-mounted device can be achieved through multiple second cameras 242. On the other hand, the images captured in the overlapping areas of the shooting fields of the adjacent second cameras 242 can be used as a basis for image stitching and depth calculation, so that the images displayed to the user are more accurate and realistic.

According to some exemplary embodiments, the number of the second cameras 242 can be designed according to the horizontal field of view (HFOV) of the second cameras 242. For example, the number of the second cameras 242 can be calculated according to the following formula:

N = 360°/(HFOV/2)

For example, if the HFOV of the second camera 242 is 60.2°, the number of the second cameras 242 may be The number of second cameras 242 is 12, and according to the shape of the shell 21, the 12 second cameras 242 are arranged inside the shell 21, so as to achieve 360° panoramic shooting around the neck-mounted device.

According to some exemplary embodiments, referring to FIG. 12 , the sizes of the overlapping ranges of the shooting fields of adjacent second cameras 242 (i.e., the ranges indicated by the triangles in FIG. 12 ) may be set to be as consistent as possible, which is beneficial to improving the accuracy of image stitching and depth calculation.

According to some exemplary embodiments, with reference to FIG. 2 in combination with FIG. 10 and FIG. 11, for example, the shape of the housing 21 may be a non-closed annular structure having an opening 21C, and the opening 21C and the hanging area 21B are respectively located on both sides of the hole 21A along the first direction X, so that the user can conveniently wear the neck-worn device. The plurality of second cameras 242 include two first sub-cameras 2421 and a plurality of second sub-cameras 2422, the two first sub-cameras 2421 are arranged adjacent to each other, and the two first sub-cameras 2421 and the hanging area 21B are respectively located on both sides of the hole 21A along the first direction X, for example, the housing 21 includes an opening 21C, and the two first sub-cameras 2421 are respectively located on both sides of the opening 21C along the second direction Y. The plurality of second sub-cameras 2422 are located between the two first sub-cameras 2421, and the plurality of second sub-cameras 2422 are arranged at intervals along the circumferential direction of the housing 21. That is, when the user wears the neck-mounted device, the first sub-camera 2421 is used to capture the image in front of the user, and the second sub-camera 2422 is used to capture the image on both sides and behind the user.

According to some exemplary embodiments, referring to FIG. 11 , the spacing between two adjacent second sub-cameras 2422 is substantially equal to the spacing between two other adjacent second sub-cameras 2422, and the spacing between two adjacent second sub-cameras 2422 is substantially equal to the spacing between the first sub-camera 2421 and the adjacent second sub-camera 2422, that is, among the plurality of second cameras 242, except for the spacing between the two first sub-cameras 2421, the spacing between other adjacent second cameras 242 can be set to be consistent as much as possible. Such a setting is conducive to making the overlapping range of the shooting fields of the two adjacent second sub-cameras 2422 and the overlapping range of the shooting fields of the other two adjacent second sub-cameras 2422 substantially equal, and the overlapping range of the shooting fields of the two adjacent second sub-cameras 2422 and the overlapping range of the shooting fields of the first sub-camera 2421 and the adjacent second sub-camera 2422 substantially equal.

It should be noted that the distance between two adjacent second cameras 242 can be understood as the distance between two second hollow holes 252 exposing the two second cameras 242, and the distance between two adjacent second hollow holes 252 can be understood as the distance between the center of one first hollow hole 251 and the center of another first hollow hole 251.

In addition, two intervals being substantially equal may be understood as a deviation of one interval from the other interval of ±10%.

According to some exemplary embodiments, referring to FIG. 12 , the main The optical axes oa intersect, and the main optical axes oa of the first sub-camera 2421 and the second sub-camera 2422 adjacent to the first sub-camera 2421 intersect, that is, according to the orientation of the second camera 242 in the shell, the directions of the main optical axes oa of the second cameras 242 are adjusted respectively, and the directions of the main optical axes oa of each second camera 242 roughly point to the center of the hole of the shell, so that the fields of view of adjacent second cameras 242 partially overlap, thereby allowing multiple second cameras 242 to achieve 360° panoramic shooting around the neck-mounted device.

According to some exemplary embodiments, referring to FIG. 12 , the angle α between the main optical axes oa of two adjacent second sub-cameras 2422 is substantially equal to the angle α between the main optical axes oa of the other two adjacent second sub-cameras 2422, and the angle α between the main optical axes oa of the two adjacent second sub-cameras 2422 is substantially equal to the angle α between the main optical axes oa of the first sub-camera 2421 and the adjacent second sub-camera 2422. Such a configuration is advantageous in that, among the plurality of second sub-cameras 2422, the overlapping range of the shooting fields of the two adjacent second sub-cameras 2422 is substantially equal to the overlapping range of the shooting fields of the other two adjacent second sub-cameras 2422, and the overlapping range of the shooting fields of the two adjacent second sub-cameras 2422 is substantially equal to the overlapping range of the shooting fields of the first sub-camera 2421 and the adjacent second sub-camera 2422.

It should be noted that FIG. 12 schematically shows the main optical axis angle α of the two cameras numbered 2 and 3, and the main optical axis angles of the other two adjacent cameras can be obtained by referring to the angle α. The angle α of the main optical axes oa of the two cameras is substantially equal to the angle α of the main optical axes oa of the other two cameras, which should be understood as the difference between the angle α of the main optical axes oa of the two cameras and the angle α of the main optical axes oa of the other two cameras is less than or equal to 5°.

The number of second sub-cameras 2422 can be multiple according to actual needs. When “the angle α between the main optical axes oa of two adjacent second sub-cameras 2422 is substantially equal to the angle α between the main optical axes oa of the other two adjacent second sub-cameras 2422”, at least one of the two adjacent second sub-cameras 2422 is a different second sub-camera 2422 from the other two adjacent second sub-cameras 2422.

Exemplarily, the included angle of the main optical axes of the second sub-camera 2422 labeled 2 and the second sub-camera 2422 labeled 3 is substantially equal to the included angle of the main optical axes of the second sub-camera 2422 labeled 3 and the second sub-camera 2422 labeled 4, or the included angle of the main optical axes of the second sub-camera 2422 labeled 2 and the second sub-camera 2422 labeled 3 is substantially equal to the included angle of the main optical axes of the second sub-camera 2422 labeled 4 and the second sub-camera 2422 labeled 5.

According to some exemplary embodiments, with reference to FIGS. 2 and 12 , the directions of the main optical axes oa of the two first sub-cameras 2421 are substantially parallel, and the directions of the main optical axes oa of the two first sub-cameras 2421 are substantially parallel to the first direction X, that is, when the user wears the neck-mounted device, the main optical axes oa of the two first sub-cameras 2421 are substantially parallel to the first direction X. The axes oa all point directly in front of the user. This setting is conducive to improving the accuracy of depth calculation for the captured front image.

It should be noted that the directions of the main optical axes oa of the two first sub-cameras 2421 being substantially parallel should be understood as the angle between the main optical axes oa of the two first sub-cameras 2421 being less than or equal to 5°.

According to some exemplary embodiments, with reference to FIG. 10 and FIG. 12 , since the two first sub-cameras 2421 are respectively located on both sides of the opening 21C along the second direction Y, the size of the opening 21C along the second direction Y needs to be larger than a certain range so that the user can conveniently wear the neck-mounted device, and therefore the distance between the two first sub-cameras 2421 can be set to be slightly larger, for example, the distance between the first sub-cameras 2421 is larger than the distance between the two adjacent second sub-cameras 2422. It should be noted that the distance between the two first sub-cameras 2421 should not be set too large, and it is still necessary to ensure that the shooting fields of the two first sub-cameras 2421 overlap.

According to some exemplary embodiments, in combination with reference to Figures 5 and 11, the two first sub-cameras 2421 are respectively installed on the two second shell rear end portions 2122, and the two second hollow holes 252 exposing the two first sub-cameras 2421 are respectively located on one side of the two second shell rear end portions 2122 close to the opening 21C.

6A and 6B, the rear end portion of the left shell has a second hollow hole 252 for exposing the first sub-camera 2421, and the inner wall of the rear end portion of the left shell at the second hollow hole 252 has a reserved bone position 2421a for installing the first sub-camera 2421. The camera fixing cover 2421b presses the first sub-camera 2421 into the reserved bone position 2421a and locks it with the rear end portion of the left shell by screws, thereby fixing the first sub-camera 2421 to the inner wall of the rear end portion of the left shell and can shoot to the outside of the shell through the second hollow hole 252.

With reference to Figures 7A and 7B, the rear end portion of the right shell has a second hollow hole 252 for exposing the first sub-camera 2421, and the inner wall of the rear end portion of the right shell located at the second hollow hole 252 has a reserved position for installing the first sub-camera 2421. The camera fixing cover presses the first sub-camera 2421 into the reserved position and locks it with the rear end portion of the right shell by screws, thereby fixing the first sub-camera 2421 to the inner wall of the rear end portion of the right shell and allowing it to shoot outside the shell 21 through the second hollow hole 252.

According to some exemplary embodiments, referring to FIG. 6A or FIG. 7A , a second protective cover plate 245 is disposed at the second hollow hole 252. The second protective cover plate 245 is located on the outer wall of the second housing rear end portion 2122 and covers the second hollow hole 252, and is used to protect the first sub-camera 2421. For example, the material of the protective cover plate includes glass, so that the second protective cover plate 245 can have a higher transmittance.

According to some exemplary embodiments, referring to FIG. 6A or FIG. 7A, a second recessed portion 248a is provided on the outer wall of the second shell tail end portion 2122, and the second recessed portion 248a is recessed toward the inside of the shell 21. The bottom of the depression 248a has a second groove 248b, and the second hollow hole 252 is set at the bottom of the second groove 248b. The shape of the second groove 248b matches the shape of the second protective cover plate 245, and the second protective cover plate 245 can be fixed in the second groove 248b by double-sided tape.

According to some exemplary embodiments, in combination with reference to Figures 5, 6A, 6B, 7A and 7B, a first camera 241 and a first sub-camera 2421 are provided on a second shell rear end portion 2122 (the left shell rear end portion shown in Figure 6A), and a first camera 241 and a first sub-camera 2421 are provided on another second shell rear end portion 2122 (the right shell rear end portion shown in Figure 7A). In a second shell rear end portion 2122, the first camera 241 is located on a side of the first sub-camera 2421 close to the hanging area 21B, that is, the first recessed portion 247a is located on a side of the second recessed portion 248a close to the hanging area 21B, and the first sub-camera 2421 is located at an end of the second shell rear end portion 2122 away from the hanging area 21B.

According to some exemplary embodiments, with reference to FIG. 10 and FIG. 11 , a plurality of second sub-cameras 2422 are arranged on the first housing 211, and a plurality of second hollow holes 252 exposing the plurality of second cameras 242 are arranged on the first housing 211, and the second hollow holes 252 are arranged on a side of the first housing 211 away from the channel 21A, and one second hollow hole 252 exposes one second sub-camera 2422, so that the plurality of second cameras 242 can shoot to the sides and rear of the user through the plurality of second hollow holes 252. The inner wall of the first housing 211 at the second hollow hole 252 has a reserved bone position for installing the plurality of second sub-cameras 2422, and the camera fixing cover plate 2422b presses the second sub-camera 2422 into the reserved bone position and is fixed to the first housing 211 by screws, so that the second sub-camera 2422 is fixed to the inner wall of the first housing 211 and can shoot to the outside of the housing 21 through the second hollow hole 252.

It should be noted that not all of the second hollow holes 252 are shown in the viewing angle shown in FIG. 10 , and FIG. 10 schematically shows a portion of the second hollow holes 252 .

According to some exemplary embodiments, referring to FIG. 5 , FIG. 10 , and FIG. 11 , the plurality of second sub-cameras 2422 are arranged symmetrically approximately along the second direction Y, a portion of the second sub-cameras 2422 are located on one side of the hole 21A along the second direction Y, and another portion of the second sub-cameras 2422 are located on the other side of the hole 21A along the second direction Y. The two second sub-cameras 2422 closest to the hanging area 21B may be located on a side of the mainboard 22 away from the hole 21A, and the other second sub-cameras 2422 are respectively located on both sides of the two second sub-cameras 2422 away from the hanging area 21B.

According to some exemplary embodiments, in combination with FIGS. 1 and 11 , the imaging planes of at least two second cameras 242 are substantially parallel to the same straight line, so that when the user wears the neck-mounted assembly, the imaging planes of at least two second cameras 242 are substantially parallel to the central axis Z of the user's neck, then the at least two second cameras The imaging planes of the heads 242 are all substantially perpendicular to the horizontal plane.

It should be noted that the imaging planes of at least two second cameras 242 are substantially parallel to the same straight line, which should be understood as the angles formed by the imaging planes of the two second cameras 242 and the same straight line are both less than or equal to 5°.

According to some exemplary embodiments, in combination with reference to Figures 1 and 11, the horizontal field of view directions of at least two second cameras 242 are basically perpendicular to the same straight line, so that when the user wears the neck-mounted assembly, the horizontal field of view directions of at least two second cameras 242 are basically perpendicular to the central axis of the user's neck, and the horizontal field of view directions of at least two second cameras 242 are roughly parallel to the horizontal plane.

It should be noted that the horizontal field of view directions of at least two second cameras 242 are substantially perpendicular to the same straight line, which should be understood as the angles formed by the horizontal field of view directions of the two second cameras 242 and the same straight line are both greater than or equal to 85° and less than or equal to 90°.

For example, the imaging planes of the multiple second cameras 242 are basically parallel to the same straight line, and the horizontal field of view directions of the multiple second cameras 242 are basically perpendicular to the same straight line. When the user wears the neck-mounted device, the multiple second cameras 242 all shoot forward to the user's surroundings, so that the captured images can be better spliced and the processing procedures for the captured images can be simplified.

FIG13 schematically shows a schematic diagram of the shooting principle of a camera of a neck-mounted device according to some embodiments of the present disclosure.

13 , it should be noted that, in the embodiment of the present disclosure, the shooting field of view of the camera refers to the range of scenes that the camera can capture, which can be referred to as the range defined by straight line 1, straight line 2, straight line 3 and straight line 4 in FIG. 13 .

The horizontal field of view of the camera refers to the direction defined by the horizontal field of view angle of the camera, which can be understood as the extension direction of straight line 5 or straight line 6 in Figure 13.

The main optical axis oa of the camera is the central axis of the camera's shooting field of view. The main optical axis oa of the camera is perpendicular to the plane defined by straight lines 5, 6, 7 and 8 in Figure 13, and intersects with the center of the plane.

The imaging plane of the camera refers to the plane where a clear image is formed after the light is focused by the lens. An image sensor is placed on this plane, which is responsible for converting the focused light into electrical signals, and then into digital signals for further processing and storage. The imaging plane of the camera is parallel to the plane defined by straight lines 5, 6, 7 and 8 in Figure 13.

According to some exemplary embodiments, with reference to FIG. 2 , FIG. 6A and FIG. 11 , the neck-mounted device further includes The third camera 243 is located in the shell 21 and is electrically connected to the main board 22. The shell 21 has a third hollow hole 253. The third hollow hole 253 exposes at least a portion of the third camera 243. The third camera 243 is located on the side of the shell 21 away from the suspension area 21B. The third camera 243 can shoot toward the outside of the shell 21 through the third hollow hole 253. When the user wears the neck-mounted assembly, the third camera 243 is configured to shoot toward the front and bottom of the user, so as to obtain the user's gesture information and send it to the main board 22, thereby realizing the gesture interaction function.

Figure 14A schematically shows a combined view of the shooting field of view of the third camera of a neck-mounted device according to some embodiments of the present disclosure. Figure 14B schematically shows a combined view of the shooting field of view of the third camera and the first sub-camera of a neck-mounted device according to some embodiments of the present disclosure.

According to some exemplary embodiments, in combination with reference to FIG. 11 and FIG. 14A , the neck-mounted device includes two third cameras 243 , and the two third cameras 243 are roughly symmetrically distributed along the second direction Y. The two third cameras 243 can be used to obtain the user's left-hand gestures and right-hand gestures, respectively.

According to some exemplary embodiments, with reference to FIG. 11 and FIG. 14B , two third cameras 243 and two first sub-cameras 2421 are arranged adjacent to each other, and in the adjacently arranged third camera 243 and first sub-camera 2421, the main optical axis oa of the third camera 243 forms a preset angle β with the main optical axis oa of the adjacent first sub-camera 2421, so that when the user wears the neck-mounted device, the first sub-camera 2421 is used to shoot directly in front of the user, and the third camera 243 is used to shoot in front of and below the user. The preset angle β is less than 90°, for example, the preset angle β can be 30°, 40°, 50°, 60° or 70°, etc.

According to some exemplary embodiments, in combination with reference to Figures 11, 14A and 14B, the directions of the main optical axes oa of the two third cameras 243 are basically parallel, and the plane determined by the main optical axis oa of one third camera 243 and the main optical axis oa of the adjacent first sub-camera 2421 is basically parallel to the plane determined by the main optical axis oa of the other third camera 243 and the main optical axis oa of the adjacent first sub-camera 2421, so that both third cameras 243 shoot toward the front and lower side of the user to achieve gesture interaction. In addition, by setting the direction of the main optical axis oa of the third camera 243 in this way, the overlapping range of the shooting field of view of the third camera 243 and the adjacent first sub-camera 2421 can be as large as possible, which is more conducive to improving the depth calculation accuracy of the picture captured by the first sub-camera 2421.

It should be understood that the plane determined by the main optical axis oa of a third camera 243 and the main optical axis oa of the adjacent first sub-camera 2421 is basically parallel to the plane determined by the main optical axis oa of another third camera 243 and the main optical axis oa of the adjacent first sub-camera 2421, and it should be understood that the angle formed between the two planes is less than or equal to 5°.

According to some exemplary embodiments, with reference to FIG. 11 and FIG. 14B , in the adjacently arranged third camera 243 and first sub-camera 2421, the shooting field of view of the third camera 243 partially overlaps with the shooting field of view of the adjacent first sub-camera 2421. According to this setting, in addition to providing the gesture interaction function, the third camera 243 can also be used as a basis for depth calculation of the picture taken by the first sub-camera 2421, which is conducive to improving the accuracy and authenticity of the front picture displayed to the user.

According to some exemplary embodiments, in combination with reference to Figures 6A, 6B, 7A, 7B and 11, two third cameras 243 are respectively arranged on the two second shell tail end portions 2122, one third camera 243 is arranged on one second shell tail end portion 2122 (the left shell tail end portion shown in Figure 6A), and the other third camera 243 is arranged on the other second shell tail end portion 2122 (the right shell tail end portion shown in Figure 7A).

6A and 6B , the rear end portion of the left shell has a third hollow hole 253 for exposing the third camera 243, and the inner wall of the rear end portion of the left shell at the third hollow hole 253 has a reserved bone position 243a for installing the third camera 243. The camera fixing cover 243b presses the third camera 243 into the reserved bone position 243a and locks it with the rear end portion of the left shell by screws, thereby fixing the third camera 243 to the inner wall of the rear end portion of the left shell and can shoot to the outside of the shell through the third hollow hole 253.

With reference to Figures 7A and 7B, the rear end portion of the right shell has a third hollow hole 253 for exposing the third camera 243, and the inner wall of the rear end portion of the right shell located at the third hollow hole 253 has a reserved bone position for installing the third camera 243. The camera fixing cover 243b presses the third camera 243 into the reserved bone position and locks it with the rear end portion of the right shell by screws, thereby fixing the third camera 243 on the inner wall of the rear end portion of the right shell and can shoot to the outside of the shell through the third hollow hole 253.

According to some exemplary embodiments, with reference to FIGS. 6A and 6B or FIGS. 7A and 7B, a third protective cover plate 246 is disposed at the third hollow hole 253, and the third protective cover plate 246 is located on the outer wall of the second housing rear end portion 2122 and covers the third hollow hole 253, so as to protect the first sub-camera 2421. For example, the material of the protective cover plate includes glass, so that the third protective cover plate 246 can have a higher transmittance.

According to some exemplary embodiments, referring to FIG. 6A or FIG. 7A, a third recessed portion 249a is provided on the outer wall of the second shell tail end portion 2122, and the third recessed portion 249a is recessed toward the inner side of the shell 21. The bottom of the third recessed portion 249a has a third groove 249b, and the third hollow hole 253 is provided at the bottom of the third groove 249b. The shape of the third groove 249b matches the shape of the third protective cover plate 246, and the third protective cover plate 246 can be fixed in the third groove 249b by double-sided tape.

11 , the mainboard 22 includes a plurality of connectors 221, and the plurality of second cameras 242 and the two third cameras 243 may be electrically connected to the plurality of connectors 221 via a plurality of connection wiring groups 222. For example, the mainboard 22 may include two first connectors 2211 and two second connectors 2212.

With reference to FIG5 and FIG11 , in a third camera 243 and a plurality of second cameras 242 located on the same side of the hole 21A along the second direction Y as the third camera 243, the third camera 243 and at least one second camera 242 are electrically connected to the first connector 2211 via a connecting wiring group 222, and at least two second cameras 242 are electrically connected to the second connector 2212 via another connecting wiring group 222; in another third camera 243 and a plurality of second cameras 242 located on the same side of the hole 21A along the second direction Y as the third camera 243, the third camera 243 and at least one second camera 242 are electrically connected to another first connector 2211 via a connecting wiring group 222, and at least two second cameras 242 are electrically connected to another second connector 2212 via another connecting wiring group 222.

For example, with reference to Figures 11 and 12, among the multiple cameras located on one side of the second direction Y, the second camera 242 labeled 1, the second camera 242 labeled 3, and the third camera 243 adjacent to the second camera 242 labeled 1 are electrically connected to the first connector 2211 through a connecting wiring group 222, and the second camera 242 labeled 2, the second camera 242 labeled 4, the second camera 242 labeled 5, and the second camera 242 labeled 6 are electrically connected to the second connector 2212 through another connecting wiring group 222. Among the multiple cameras located on the other side of the second direction Y, the second camera 242 labeled 12, the second camera 242 labeled 10, and the third camera 243 adjacent to the second camera 242 labeled 12 are electrically connected to the first connector 2211 through a connecting wiring group 222, and the second camera 242 labeled 11, the second camera 242 labeled 9, the second camera 242 labeled 8, and the second camera 242 labeled 7 are electrically connected to the second connector 2212 through another connecting wiring group 222.

Figures 15A and 15B schematically illustrate exploded views of a neck pad assembly of a neck-mounted device according to some embodiments of the present disclosure, wherein Figures 15A and 15B respectively illustrate exploded views observed from different angles.

According to some exemplary embodiments, in combination with reference to Figures 2, 5, 15A and 15B, the neck-worn device also includes a neck pad assembly 27, which is disposed at a suspension area 21B of the shell 21, and the neck pad assembly 27 is located on the outer wall of the shell 21 on the side close to the channel 21A. The neck pad assembly 27 is used to provide support for the user's neck when worn, thereby improving the user's wearing comfort.

The neck pad assembly 27 may include a first neck pad frame 271, a second neck pad frame 272, a sponge support body 273, and a second neck pad frame 274. The neck pad wrapping layer 274 is provided, the sponge support body 273 is adhered to the side of the second neck pad frame 272 away from the first neck pad frame 271 by double-sided adhesive, the neck pad wrapping layer 274 is located on the side of the sponge support body 273 away from the second neck pad frame 272, the neck pad wrapping layer 274 wraps the sponge support body 273 and the second neck pad frame 272 as a whole, and then the first neck pad frame 271 is used to press the edge of the neck pad wrapping layer 274 between the first neck pad frame 271 and the second neck pad frame 272, and the first neck pad frame 271 and the second neck pad frame 272 can be screwed. The neck pad assembly 27 is connected to the side of the suspension area 21B of the shell 21 close to the channel 21A, for example, the neck pad assembly 27 can be detachably connected to the shell 21 by magnetic attraction.

According to some exemplary embodiments, referring to FIG. 15A and FIG. 15B , a plurality of hollow structures may be provided on the first neck pad skeleton 271 and the second neck pad skeleton 272 , so as to reduce the weight of the neck pad assembly, thereby reducing the weight of the neck-worn device and improving the wearing comfort of the user.

Figures 16A and 16B schematically illustrate exploded views of the second shell body of the neck-mounted device according to some embodiments of the present disclosure, wherein Figures 16A and 16B respectively illustrate exploded views observed from different angles.

According to some exemplary embodiments, in combination with reference to Figures 5, 16A and 16B, the second shell main body 2121 includes a second shell skeleton 212a, a second shell wrapping layer 212b and a pressing piece 212c, the second shell wrapping layer 212b wraps the second shell skeleton 212a, the second shell wrapping layer 212b has a square hollow hole 212d, the pressing piece 212c covers the square hollow hole 212d and is locked with the second shell skeleton 212a, the pressing piece 212c can press the edge of the second shell wrapping layer 212b at the square hollow hole 212d to hide it between the second shell skeleton 212a and the pressing piece 212c, thereby increasing the aesthetics of the second shell main body 2121.

According to some exemplary embodiments, with reference to Fig. 5, Fig. 15A, Fig. 15B, Fig. 16A and Fig. 16B, a side of the neck pad assembly 27 close to the second shell body 2121, for example, a side of the first neck pad frame 271 close to the second shell body 2121 is provided with a protruding plug-in 276. A plug-in 212e is provided on the side of the second shell body 2121 close to the neck pad assembly 27, for example, a plug-in 212e is provided on the pressing piece 212c, and the shape of the plug-in 212e matches the assembly of the plug-in 276 on the neck pad assembly 27, and the plug-in 212e can serve as an assembly guide, and the assembly of the neck pad assembly 27 and the shell 21 is achieved by inserting the plug-in 276 on the neck pad assembly 27 into the plug-in 212e of the second shell body 2121.

According to some exemplary embodiments, with reference to FIGS. 15A, 15B, 16A and 16B, the plug-in 276 has a groove structure, and a first magnet 275 is disposed in the groove structure of the plug-in 276, the second shell body 2121 has a groove structure on one side away from the second shell wrapping layer 212b, and a second magnet 212f is disposed in the groove structure of the second shell body 2121, the first magnet 275 and the second magnet 212f have different polarities, and the magnetic force generated between the first magnet 275 and the second magnet 212f can stabilize the neck pad assembly 27. It is firmly adsorbed on the second shell body 2121 .

According to some exemplary embodiments, referring to FIG. 5 , with the first shell 211 as the base, the second shell body 2121 and the two second shell tail end portions 2122 can be assembled with the first shell 211 by means of a snap connection. On the basis of the snap connection, the first shell 211 and the second shell body 2121 can also be fastened by screws, so that the first shell 211 and the second shell body 2121 are more firmly connected.

Fig. 17 schematically shows an exploded view of a heat dissipation component of a neck-worn device according to some embodiments of the present disclosure. Fig. 18 schematically shows a heat dissipation principle diagram of a heat dissipation component of a neck-worn device according to some embodiments of the present disclosure.

According to some exemplary embodiments, in combination with reference to FIG. 5 and FIG. 17 , the neck-mounted device further includes a heat dissipation component 28, which is disposed adjacent to the mainboard 22 for dissipating heat from the mainboard 22, thereby reducing the temperature of the mainboard 22 during operation. The heat dissipation component 28 may be located on a side of the mainboard 22 away from the hole 21A, that is, the heat dissipation component 28 may be located on a side of the mainboard 22 close to the first housing 211, and the heat dissipation component 28 includes a heat sink 281 located on the mainboard 22 close to the first housing 211, a thermal grease 282 located between the heat sink 281 and the mainboard 22, a heat dissipation fan 283 located on a side of the heat sink 281 close to the first housing 211, and a fan fixing plate 284 located on a side of the heat dissipation fan 283 close to the first housing 211, and the heat dissipation fan 283 is fixed to the first housing 211 through the fan fixing plate 284.

For example, referring to FIG8 , the fan fixing plate 284 can be fixed to the first housing 211 by four screws, and then the heat dissipation fan 283 can be fixed to the fan fixing plate 284 by screws, and the heat sink 281 and the mainboard 22 can be pre-fixed by installing the positioning column, and then three screws are locked to fix the heat sink 281 and the mainboard 22, and finally the heat dissipation assembly 28 is fixed as a whole to the four screw positioning columns in the first housing 211, and the heat dissipation assembly 28 is fixed as a whole to the housing 21 by four screws. Then, a thermal paste is attached to the position of the heating charging IC of the mainboard 22, and two pressing sheets 285 are fixed by two screws each, so as to dissipate heat from the heating components of the mainboard 22.

According to some exemplary embodiments, with reference to FIG. 5 and FIG. 17 , the heat dissipation fan 283 includes two fans 2831, and the fan fixing plate 284 has two ventilation holes 2841 corresponding to the two fans 2831. The fan assembly is used to enhance the fluidity of the air in the housing 21, thereby improving the heat dissipation efficiency of the heat dissipation assembly 28. The fan is controlled by PWM (pulse width modulation), and the circuit design is 4 pin. The speed of the fan can be adjusted according to the temperature of the motherboard 22 during use. When the temperature of the motherboard 22 is high, the fan speed can be increased to improve the heat dissipation efficiency. When the temperature of the motherboard 22 is low, the fan speed can be reduced to reduce the noise generated when the fan is running.

According to some exemplary embodiments, in combination with reference to Figures 3, 8, 10, 16A and 17, the cooling fan 283 is configured to discharge air in a direction away from the mainboard 22, and a plurality of air inlet hollow portions 286 arranged at intervals are provided on the side of the shell 21 close to the channel 21A, and a plurality of air outlet hollow portions 287 arranged at intervals are provided on the side of the shell 21 away from the channel 21A. For example, a plurality of air outlet hollow portions 287 are provided on the first shell 211, and a plurality of air inlet hollow portions 286 are provided on the second shell frame 212a of the second shell main body 2121.

With reference to Figures 3, 5, 16A, 17 and 18, under the joint action of the cooling fan 283, the air inlet hollow portion 286 on the second shell main body 2121 and the air outlet hollow portion 287 on the first shell 211, air can enter the shell from the air inlet hollow portion 286 on the second shell main body 2121. In the process of air flowing in the shell, the air will pass through the main board 22 and the heat dissipation component 28 and take away part of the heat in the main board 22 and the heat dissipation component 28, and then flow out from the air outlet hollow portion 287 on the first shell 211 to the outside of the shell 21, thereby effectively improving the heat dissipation efficiency of the heat dissipation component 28.

According to some exemplary embodiments, with reference to FIGS. 3, 5, 8 and 10, a plurality of air outlet hollow portions 287 in the first housing 211 are located on a side of the heat dissipation assembly 28 away from the main board 22, and with reference to FIGS. 5, 16A and 16B, the housing 21 has a windshield 288 on the side near the hole 21A, for example, the windshield 288 is located on the second housing frame 212a of the second housing main body 2121, the windshield 288 is located on a side of the main board 22 away from the heat dissipation assembly 28, and a plurality of air inlet hollow portions 286 are arranged around the windshield 288. According to this arrangement, the airflow direction in the housing 21 can be adjusted, which is conducive to further improving the heat dissipation efficiency of the heat dissipation assembly 28.

It should be noted that the wind shield 288 can be understood as a portion without a hollow structure, so that air does not enter the shell from the wind shield 288 , but enters the shell from the air inlet hollow portion 286 located around the wind shield 288 .

According to some exemplary embodiments, in combination with reference to Figures 5, 16A, 16B and 18, a plurality of air inlet hollow portions 286 are located on one side of the wind shield 288 along the second direction Y and are arranged at intervals in the direction close to the opening 21C. For example, a plurality of air inlet hollow portions 286 are arranged at intervals in the area from the one side of the wind shield 288 along the second direction Y to the edge of the second shell frame 212a close to the second shell tail end portion 2122. That is, as many air inlet hollow portions 286 as possible are arranged. On the one hand, the air flow entering the shell can be increased, and on the other hand, the weight of the shell can be effectively reduced, thereby improving the wearing comfort of the neck-mounted device.

According to some exemplary embodiments, with reference to FIGS. 5 and 16A , the hollow shape of the air inlet hollow portion 286 includes a long strip, and in the plurality of air inlet hollow portions 286 located between the wind shield portion 288 and the opening 21C, the extension direction of the air inlet hollow portion 286 forms an acute angle with the extension direction of the opening 21C toward the wind shield portion 288, that is, the air inlet hollow portion 286 is substantially rectangular. The extension direction of the hollow portion 286 is not perpendicular to the extension direction of the opening 21C to the wind shield portion 288. According to this arrangement, the wind resistance when air enters the shell from the air inlet hollow portion 286 can be reduced, thereby increasing the air flow entering the shell and improving the heat dissipation efficiency.

It should be noted that the hollow shape of the air inlet hollow portion 286 is a long strip, and the extension direction of the air inlet hollow portion 286 should be understood as the long side direction of the air inlet hollow portion 286. FIG16A schematically shows an extension direction M of an air inlet hollow portion 286. The extension direction of the opening 21C to the windshield portion 288 should be understood as the extension direction of the end of the second shell frame 212a close to the opening 21C to the windshield portion 288. FIG16B schematically shows the extension direction N of the opening 21C to one side of the windshield portion 288.

According to some exemplary embodiments, in combination with reference to Figures 5 and 16A, a plurality of air inlet hollow portions 286 located on one side of the wind shield 288 along the second direction and a plurality of air inlet hollow portions 286 located on the other side of the wind shield 288 along the second direction Y are roughly symmetrically distributed on both sides of the channel 21A along the second direction Y.

According to some exemplary embodiments, referring to FIG. 16A and FIG. 16B , the plurality of air inlet hollow portions 286 include a first air inlet portion 286A and a second air inlet portion 286B, the first air inlet portion 286A is located between the second air inlet portion 286B and the wind shield portion 288, and the distribution density of the air inlet hollow portions 286 in the first air inlet portion 286A is less than the distribution density of the air inlet hollow portions 286 in the second air inlet portion 286B. The second shell frame 212a has a greater curvature at the first air inlet portion 286A, and the distribution density of the air inlet hollow portions 286 in the first air inlet portion 286A can be set to be smaller, which is beneficial to improving the overall strength of the second shell frame 212a, and the second shell frame 212a has a smaller curvature at the second air inlet portion 286B, and the distribution density of the air inlet hollow portions 286 in the second air inlet portion 286B can be set to be larger, which can increase the air flow into the shell and improve the heat dissipation efficiency.

It should be noted that the distribution density of the air inlet hollow portions 286 should be understood as the number of the air inlet hollow portions 286 per unit area.

According to some exemplary embodiments, referring to FIG. 16A , a plurality of air inlet hollow portions 286 may also be provided on the upper side and the lower side of the wind shielding portion 288 .

According to some exemplary embodiments, in combination with reference to FIG. 3 and FIG. 16A, the size of the air inlet hollow portion 286 is larger than the size of the air outlet hollow portion 287. Since the second shell skeleton 212a will be covered by the second shell wrapping layer 212b, the air inlet hollow portion 286 will be covered by the second shell wrapping layer 212b. The size of the air inlet hollow portion 286 can be set to be slightly larger, which is beneficial to increase the air flow entering the shell and thus improve the heat dissipation efficiency. The air outlet hollow portion 287 located on the first shell 211 is exposed to the outer surface of the neck-worn device, and the size of the air outlet hollow hole needs to be set to be smaller to avoid the internal structure of the shell being exposed by the air outlet hollow hole. It should be noted that the second shell wrapping layer 212b is made of fabric and will not block the air from the air inlet hollow portion 286. The size of the air inlet hollow portion 286 and the size of the air outlet hollow portion 287 can be understood as the hollow area of the air inlet hollow portion 286 and the hollow area of the air outlet hollow portion 287 .

According to some exemplary embodiments, referring to Figure 6B, the neck-worn device also includes a button assembly 31, and the button assembly 31 can be located in the rear end portion 2122 of the second shell on one side. The button assembly 31 includes a button body 311 and a button panel 312. The button body 311 can be melted to the inner side of the rear end portion 2122 of the second shell by a hot melt column, and the button panel 312 and the rear end portion 2122 of the second shell can be fixed by two screws, and the button assembly 31 is fixed between the button panel 312 and the rear end portion 2122 of the second shell. Each button on the button assembly 31 is exposed outside the shell through the hollow structure on the rear end portion 2122 of the second shell, and the user can realize the corresponding function by pressing the button.

According to some exemplary embodiments, referring to FIG. 7B , the neck-mounted device further includes a touch component 32. The touch component 32 may be located within the rear end portion 2122 of the second shell on the other side. The touch component 32 may be adhered to the inner side of the rear end portion 2122 of the second shell. The touch component 32 is exposed outside the shell through the hollow structure on the rear end portion 2122 of the second shell. The user may realize corresponding functions by touching the touch component 32.

According to some exemplary embodiments, referring to Figure 8, the neck-mounted assembly also includes a first circuit board 331 and a second circuit board 332. The first circuit board 331 and the second circuit board 332 can be fixed on the first shell 211 and electrically connected to the main board 22. The first circuit board 331 is used to realize the charging function, and the second circuit board 332 is used to realize the headphone connection function.

According to some exemplary embodiments, in combination with reference to FIG. 1, FIG. 8 and FIG. 10, the neck-mounted device further includes a magnetic terminal 34, and the magnetic terminal 34 includes a terminal soft silicone 341, a magnetic terminal female seat 342 and a magnetic terminal bracket 343. The terminal soft silicone 341 is adhered to the inner side of the first shell 211 by glue, and the magnetic terminal female seat 342 and the magnetic terminal bracket 343 can be fixed by screws and then locked to the first shell 211. The neck-mounted device may include two magnetic terminals 34, and the two magnetic terminals 34 are respectively located on both sides of the plurality of air outlet hollow portions 287, and the two magnetic terminals 34 can be electrically connected to the head-mounted device 10 through two magnetic signal lines 37 to form a wearable device.

It should be noted that FIG. 1 and FIG. 8 only schematically show the structure in which the magnetic signal line 37 is connected to one end of the neck-mounted device 20 , and the other end of the magnetic signal line 37 is connected to the head-mounted device 10 .

According to some exemplary embodiments, in combination with reference to Figures 5 and 8, the neck-mounted device also includes a battery assembly 35, the battery assembly 35 includes a first battery 351 and a second battery 352, and the first battery 351 and the second battery 352 are respectively fixed between the two second shell tail end portions 2122 and the first shell 211.

According to some exemplary embodiments, referring to FIG. 8 , the neck-mounted device further includes a device for increasing aesthetics. The decorative strip is provided with a hollow structure for exposing the second camera, for example, it may include a middle decorative strip 361, a right decorative strip 362 and a left decorative strip 363, and the middle decorative strip 361, the right decorative strip 362 and the left decorative strip 363 are respectively attached to the outside of the first shell 211 by double-sided tape.

In the wearable devices provided in some exemplary embodiments, a first inertial measurement unit can also be set on the head-mounted device, and the first inertial measurement unit is used to obtain first inertial navigation data of the head-mounted device. The mainboard can obtain human ear position information by combining the first inertial navigation data and the image captured by the first camera.

FIG19 schematically shows a schematic diagram of the main structural block diagram of a wearable device according to some embodiments of the present disclosure. Exemplarily, in some embodiments, a positioning device for a split wearable device is proposed. With reference to FIG1 , FIG4 , FIG9 and FIG19 , the split wearable device includes a head-mounted device 10 and a neck-mounted device 20, and the neck-mounted device 20 is provided with a speaker 231. The positioning device includes: a first inertial measurement unit 101 provided on the head-mounted device 10, for obtaining the first inertial navigation data of the head-mounted device 10; an image acquisition unit (e.g., a first camera 241) provided on the neck-mounted device 20, for obtaining the image data of the head-mounted device 10; and a controller 30 (e.g., a mainboard 22) for obtaining the relative positioning of the head-mounted device 10 and the neck-mounted device 20 based on the first inertial navigation data and the image data.

19 , the controller 30 may be disposed in the head mounted device 10 or in the neck mounted device 20. When the controller 30 is disposed on the neck mounted device 20, the weight of the head mounted device 10 may be reduced, and the wearing comfort of the wearer may be increased.

The image acquisition unit (e.g., the first camera 241) is located on the head mounted device 10, and the acquired graphics are transmitted to the controller 30 through wireless technology or other means. The wireless technology may be selected from Bluetooth technology, wireless serial port, WiFi, or wireless network communication technology that complies with the 5G WiFi communication protocol to ensure data transmission rate and data throughput.

In some exemplary embodiments, referring to FIG. 19 , communication between the head mounted device 10 and the controller 30 may also be achieved through a connecting line.

According to some exemplary embodiments, the first inertial measurement unit may be an IMU (Inertial Measurement Unit), which is mainly a sensor used to detect and measure acceleration and rotational motion. IMU mainly measures two physical quantities, one is angular velocity, which can be integrated to calculate the angle of rotation of the object, and the other is acceleration, which can be integrated to calculate the running speed and distance of the object. The above two physical quantities can be used to obtain the short-term running trajectory of the object. When in use, the IMU moves as the user's head-turning action drives the movement of the head-mounted device, and collects the translation, rotation and other posture information of the head-mounted device in real time. The first inertial navigation data includes the angular velocity and acceleration data of the head-mounted device. The first inertial navigation data also includes the posture of the head-mounted device Information, the posture information is obtained based on the angular velocity and acceleration data.

The image acquisition unit may include a camera, and the image data of the head-mounted device includes an image acquired by taking a photo with a camera head. The camera acquires an image of the current viewing angle through the camera head. The camera head is mounted on the neck-mounted device and shoots toward the head-mounted device to obtain image information of the head-mounted device relative to the camera head.

The advantage of IMU is that it can provide the relative motion displacement of the head-mounted device. The disadvantage is the error accumulation and drift of IMU. Since IMU is only applicable to posture estimation in a short period of time, the error accumulation caused by drift of IMU makes it difficult for IMU to achieve long-term direction estimation. Therefore, the absolute position information of the head-mounted device is obtained through the image obtained by the first camera to correct the relative displacement of IMU. The correction method can use a combination of inertial positioning and visual positioning in the prior art, such as a filter-based method or an optimization/bundle adjustment (BA)-based method to achieve correction, and after correction, the accurate relative motion displacement of the head-mounted device is obtained.

The camera collects images of the human ear at intervals to obtain the positional relationship of the human ear relative to the camera head. In the interval between two image acquisitions, the relative position of the head-mounted device is obtained through the IMU. As a supplement to image acquisition, the IMU collects the posture of the head-mounted device between two adjacent photographs to obtain the translation and rotation trajectory of the head-mounted device, thereby realizing the positioning of the head-mounted device within the interval between photographs. Although the IMU has drift, after the above correction, accurate IMU posture acquisition data of the head-mounted device is obtained. In this way, the relative positioning of the head-mounted device and the neck-mounted device is obtained by combining the image and the IMU.

For example, in an application scenario, the positional relationship of the head-mounted device relative to the camera head is obtained through the image captured by the camera. Taking the camera head as the origin, the three-dimensional coordinates of the head-mounted device in the camera coordinate system can be obtained. The installation position of the camera on the neck-mounted device is known, and the three-dimensional coordinates of the neck-mounted device in the camera coordinate system can be obtained. The positional relationship between the head-mounted device and the neck-mounted device is obtained through the camera coordinate system to achieve the positioning of the head-mounted device and the neck-mounted device on the image.

In some exemplary embodiments, in combination with reference to Figures 1, 8, 9 and 19, the neck-mounted device may also include: at least two speakers 231, located corresponding to two ears of the wearer of the head-mounted device 10, wherein the controller 30 obtains the relative positioning of the speakers and the ears based on the relative positioning of the head-mounted device and the neck-mounted device.

For example, the positions corresponding to the two ears of the wearer of the head-mounted device are the projection range of the ears on the neck-mounted device in the front-view state. The head-mounted device is mounted on the wearer's head through the wearer's ears. The positions of the wearer's ears relative to the head-mounted device in the front-view state are known, and the installation positions of the speakers on the neck-mounted device are also known. For example, two speakers can be installed, and when the wearer looks forward, one speaker corresponds to the bottom of one ear. Alternatively, four speakers can be installed, and when the wearer looks forward, two speakers correspond to the bottom of one ear. In this way, the relative positioning of the speakers and the ears can be obtained through the relative positioning of the head-mounted device and the neck-mounted device.

Those skilled in the art will understand that since the position between the wearer's ear and the head-mounted device is relatively fixed, and the position between the neck-mounted device and the speaker is relatively fixed, after the relative positioning of the head-mounted device and the neck-mounted device is obtained, the relative positioning of the ear and the speaker will naturally be obtained.

It should be noted that in the application scenario, the positional relationship between the head-mounted device and the neck-mounted device constructed with the camera as the origin can obtain the relative positions of the speaker and the ear through methods such as the three-dimensional coordinate system conversion matrix.

In the above embodiment, only when the head mounted device is provided with an IMU, the image acquisition frequency of the first camera needs to be high enough so that the mainboard can obtain the relative positioning of the head mounted device and the neck mounted device based on the first inertial navigation data and the image data. For example, the first camera uses a high frame rate camera such as a 60 frame, 90 frame or higher frame camera.

The means of collecting images by the first camera is the visual positioning method. The visual positioning method uses the visual system to collect environmental images through imaging devices during the movement of the mobile device and extract the feature points of different images, and estimates the movement of the mobile device by checking the changes in the feature points of the image. The means of collecting the first inertial navigation data using the first inertial measurement unit is inertial positioning. Inertial positioning is a relative positioning method that uses the known initial position to calculate the position and posture of the next moment based on the continuously measured acceleration and angular velocity of the mobile device, thereby estimating the current posture of the mobile device in real time. Although the visual positioning method can obtain high-precision positioning results, its positioning frequency is too low and there is a possibility of positioning failure. The inertial element has high short-term accuracy and has accuracy constraints, but due to the high output frequency of the inertial element, the cumulatively calculated posture will introduce corresponding cumulative errors, resulting in a "drift" problem.

Theoretically, if the first camera has an infinitely high frame rate, the relative positioning of the head-mounted device and the neck-mounted device can be completed with only the first camera. However, the actual high frame rate brings high energy consumption, so the first camera cannot reach an infinitely high frame rate. In this embodiment, the first camera and the single IMU are used in conjunction. The first camera locates the neck-mounted device and the head-mounted device, and the single IMU only locates the head-mounted device. Therefore, the first camera is still required to maintain a high frame rate and a high image acquisition frequency, so as to ensure the relative positioning accuracy of the head-mounted device and the neck-mounted device.

The embodiment of the present disclosure adopts a vision and inertial fusion method. Since a high frame rate first camera is used, the visual positioning result is mainly used. When the visual positioning result appears, the current visual positioning result is used as the positioning result. The result is output; thereafter, until a new visual positioning result appears, the positioning result is calculated and predicted based on the visual positioning result and the posture obtained by the inertial element as the positioning result output; when the next visual positioning result appears, the visual positioning result at the current moment is output as the positioning result.

According to some exemplary embodiments, referring to FIG. 19 , a second inertial measurement unit 102 may also be provided on the neck-mounted device 20. The second inertial measurement unit 102 is used to obtain second inertial navigation data of the neck-mounted device 20. The controller 30 may obtain the human ear position information by combining the first inertial navigation data, the second inertial navigation data and the image captured by the first camera.

For example, the second inertial measurement unit is an IMU (Inertial Measurement Unit), which is mainly a sensor used to detect and measure acceleration and rotational motion. When in use, the IMU moves with the movement of the neck-worn device, and collects the position information such as translation and rotation of the neck-worn device in real time. The second inertial navigation data includes the angular velocity and acceleration data of the neck-worn device. The second inertial navigation data also includes the position information of the neck-worn device, and the position information is obtained according to the angular velocity and acceleration data.

In this embodiment, the first camera and the dual IMU are used in combination. The first camera is used to determine the relative position of the neck-mounted device and the human ear. One IMU is used to locate the head-mounted device, and the other IMU is used to locate the neck-mounted device. This configuration can reduce the frequency of the first camera collecting images, and visual positioning is no longer the main method. In the interval between the acquisition of two adjacent images, the motion trajectory of the head-mounted device in the interval is obtained through the first inertial measurement unit, and the motion trajectory of the neck-mounted device in the interval is obtained through the second inertial measurement unit. The drift of the two inertial measurement units is corrected using images, and finally the position of the human ear relative to the camera is accurately and in real time obtained through images and two inertial measurement units, thereby realizing the relative positioning of the two. The first camera and the dual IMUs work together to improve the accuracy and real-time performance of positioning, while greatly reducing the energy consumption of the first camera.

According to some exemplary embodiments, a light emitting light source or a reflective light source may be further provided on the head mounted device for positioning the head mounted device when the first camera acquires image data of the head mounted device. The light emitting light source or the reflective light source may be selected according to the aesthetics of the actual product.

According to some exemplary embodiments, the reflective light source is a retroreflective film. Retroreflective film is a marking patch used for stereo positioning. High reflectivity retroreflective film is selected to increase brightness and return the incident light to its original path, so that the retroreflective film will be very bright, much brighter than the surrounding diffusely reflected light.

According to some exemplary embodiments, the light source is an LED lamp, or may be other types of light sources.

According to some exemplary embodiments, the first camera is a monocular camera. When a monocular camera is used, there are at least two corresponding light sources, so as to obtain a stereoscopic image of the head-mounted device.

According to some exemplary embodiments, the first camera is a binocular camera, and since the binocular camera can recognize depth information, the corresponding light source can be one. When there are multiple light sources, they are distributed as dispersedly as possible with a certain interval, which is conducive to image recognition and positioning.

According to some exemplary embodiments, when the light source is a reflective light source, the neck-mounted device further includes an auxiliary light source for illuminating the reflective light source when the first camera is shooting.

According to some exemplary embodiments, the auxiliary light source is an infrared light source. Infrared light is invisible light, and is more beautiful when applied to products, and can also be used at night.

According to some exemplary embodiments, the first camera includes a near infrared filter, for example, the near infrared filter is attached to the camera head of the camera, and when used during the day, the near infrared light source filter selects to leave light in the 850nm or 940nm band, thereby suppressing background light interference and improving imaging quality. For example, the near infrared filter can select a long wave pass filter or a narrow band filter.

According to some exemplary embodiments, when the image acquisition unit (such as the first camera) is a monocular camera, the infrared light source is arranged next to the monocular camera; when the image acquisition unit (such as the first camera) is a binocular camera, the infrared light source is arranged between the binocular cameras.

For example, the lens FOV of the image acquisition unit (such as the first camera) and the luminous angle of the infrared light source can cover the entire head-mounted device.

For example, there is no need to install a light source on the head-mounted device, and the camera can capture the characteristic locations of the head-mounted device.

For example, a non-luminous marker patch is provided on the head mounted device, and the patch is in a striking color, so that it has a positioning function similar to a luminous light source.

For example, the head mounted device includes a body and a connection piece for connecting to a wearer's ear, wherein the light source is arranged on the connection piece.

For example, in an application scenario, the head-mounted device is a head display device, the body is a display glasses part with optical display lenses, and the connecting piece is a temple for mounting the display glasses part on the ear. The light source is set on the temple, and the relative position of the ear and the temple is known, so the ear can be easily located by locating the temple.

FIG20 schematically shows a main flow chart of a positioning method according to some embodiments of the present disclosure.

Another embodiment of the present disclosure further provides a positioning method for a wearable device, referring to FIG. 20 , comprising:

S10, acquiring first inertial navigation data of the head mounted device through a first inertial measurement unit arranged on the head mounted device;

S20, acquiring image data of the head-mounted device through a first camera provided on the neck-mounted device;

S30, obtaining the relative positioning of the head-mounted device and the neck-mounted device based on the first inertial navigation data and the image data through the mainboard.

Figure 21 schematically shows a flowchart of the steps of obtaining the relative positioning of the head-mounted device and the neck-mounted device of the wearable device based on the first inertial navigation data and image data of the wearable device according to some embodiments of the present disclosure.

According to some exemplary embodiments, in S30, referring to FIG. 21 , obtaining the relative positioning of the head mounted device and the neck mounted device based on the first inertial navigation data and the image data includes:

S301, obtaining absolute position information of the head mounted device according to the image data;

S302, obtaining relative position information of the head mounted device according to the first inertial navigation data;

S303: Use the absolute position information to correct the relative position information to obtain the relative positioning of the head-mounted device and the neck-mounted device.

Next, a specific wearable device is used to describe the process of obtaining the absolute position information of the head-mounted device based on image data.

The head-mounted device of the wearable device is a display glasses, which is marked by a retroreflective film. There are two retroreflective films, which are spaced apart on the temples of the display glasses. The first camera is a monocular camera, and an infrared light source is set on the neck-mounted device, which is set close to the monocular camera. The retroreflective film is used to retroreflect the incident light of the infrared light source.

The process of obtaining the absolute position information of the head mounted device based on the image data includes:

(1) an image acquisition device acquires images;

(2) Using threshold segmentation method to segment the inverse film image;

(3) Determine whether the number of reverse films is sufficient;

The reverse reflective film may be covered by human hands. For example, during the image acquisition process, the wearer holds the glasses with his hands, causing one or several reverse reflective films to be covered. For example, when a monocular camera is used with the reverse reflective film, at least two corresponding reverse reflective films are required when acquiring an image. If there is a cover, for example, only one is recognized, it is determined that the number of reverse reflective films is insufficient.

(4) If sufficient, the center of the retroreflective film is extracted, and the position of the retroreflective film (such as the temple of the head display device) and the positioning of the first camera are calculated using a PNP algorithm or a neural network.

If the PNP algorithm is used, the monocular camera needs at least three anti-reflection films, and if the neural network algorithm is used, at least two anti-reflection films are required.

Taking the PNP algorithm as an example, the first camera positioning is mainly about how to estimate the external parameters [RT] of the first camera, and the first camera positioning based on feature points. The first camera positioning is also called the PNP (Perspective-N-Point) problem, also known as the N-point perspective problem. The so-called PNP problem refers to the problem of estimating the position and direction of the observed object relative to the first camera from the N image points under the premise that the first camera has been calibrated and there are N marked points with known positions on the observed object. The abstract description is that given n marked points, the relative distance of each pair of marked points, the angle between the line connecting the marked point and its image point and the optical center of the first camera, the distance between the marked point and the optical center of the first camera is calculated. Generally speaking, the visual positioning based on the PNP problem has multiple solutions. However, for any three points in the plane that are not in a straight line and four given points, the visual positioning based on the PNP problem has a unique solution. The PNP problem actually converts the object positioning problem into a mathematical problem of solving a set of equations.

(5) The position of the head-mounted device is obtained according to the position of the marker reverse film (such as the temple of the head-mounted device), and the position of the neck-mounted device is obtained according to the position of the first camera. (The positions of the temple and the head-mounted device are known, and the position of the first camera on the neck-mounted device is known) to achieve the positioning of the head-mounted device and the neck-mounted device.

FIG22 schematically shows a main flow chart of a sound playing method according to some embodiments of the present disclosure.

On the basis of the above positioning method, an embodiment of the present disclosure further provides a sound playing method for a wearable device, referring to FIG. 22 , comprising:

S41, obtaining relative positioning of the head-mounted device and the neck-mounted device according to a positioning method for wearable devices;

S42, obtaining a relative position of a speaker disposed on the neck-mounted device and an ear of a wearer of the head-mounted device according to the relative position of the head-mounted device and the neck-mounted device;

S43, obtaining a head-related transfer function corresponding to the speaker according to the relative positioning of the speaker and the ear;

S44, based on the head-related transfer function, controls the speaker to sound.

In one application scenario, the number of speakers set in the neck-worn device is 4. When the wearer looks forward, two speakers correspond to each ear, and the speakers are used to complete the audio playback function. Through relative positioning, the control signal input to the speaker is adjusted through the algorithm. The speaker receives the control signal and adjusts the playback of each speaker. The specific process is:

A HRTF library is pre-established. HRTF is a head-related transfer function. The HRTF library includes the HRTF of each speaker on the neck-worn device.

Based on the relative positioning as input information, the far-field HRTF and near-field HRTF are found from the preset HRTF library by table lookup, and the actual sound emitted by each speaker is adjusted to: (positioning distance*far-field HRTF)/near-field HRTF.

When the wearer puts on the head-mounted device, the posture changes, for example, from looking straight ahead to turning the head to look sideways. At this time, the values of the far-field HRTF and the near-field HRTF change, and the positioning distance also changes. According to the above algorithm, the actual sound produced by the speaker is adjusted.

Those skilled in the art will appreciate that the embodiments of the present disclosure are not limited to the above-mentioned speaker control sound production method.

For example, in order to prevent the sounds of the left and right ears from interfering with each other, crosstalk elimination technology can be added, and the specific implementation method is not limited.

In some embodiments of the present disclosure, an inertial measurement unit is provided on the head-mounted device or an inertial measurement unit is provided on both the head-mounted device and the neck-mounted device. In combination with a first camera provided on the neck-mounted device, the inertial measurement unit data is used to provide high-speed relative positioning, and the inertial measurement data is corrected using the visual positioning result. This enables real-time, accurate and efficient positioning of the relative position between the head-mounted device and the neck-mounted device.

The positioning device provided by some embodiments of the present disclosure can obtain the relative position of the ear and the speaker based on the relative position of the head-mounted device and the ear and the installation position of the speaker on the neck-mounted device.

The relative positions of the ears and the speakers obtained by the positioning device provided by some embodiments of the present disclosure are used to adjust the sound signals output by each speaker in real time to create a sense of spatial immersion.

It should be pointed out that although the various steps in the above embodiments are described in a specific order, those skilled in the art can understand that in order to achieve the effects of the present invention, different steps do not have to be performed in such an order. They can be performed simultaneously (in parallel) or in other orders. These changes are within the scope of protection of the present invention.

It should be understood that although some embodiments of the overall technical concept of the present disclosure have been shown and described, those skilled in the art will understand that changes may be made to these embodiments without departing from the principles and spirit of the overall technical concept, and the scope of the present disclosure is defined by the claims and their equivalents.

Claims (26)

A neck-worn device, wherein the neck-worn device comprises: A shell, the shell being arranged around a hole for providing a wearing space; A mainboard, located inside the housing; an audio component located inside the housing; and A first camera, located inside the housing; Among them, the first camera is electrically connected to the audio component through the mainboard, the shell has a first hollow hole, the first hollow hole exposes at least a part of the first camera, and the first hollow hole is located on a side of the shell close to the channel. The neck-mounted device according to claim 1, wherein the shell includes a hanging area located on one side of the channel along the first direction, and the neck-mounted device includes at least two of the first cameras, and at least two of the first cameras are respectively located on both sides of the channel along the second direction, and the second direction is perpendicular to the first direction. The neck-worn device according to claim 2, wherein the neck-worn device further comprises at least two microphones located in the shell, the at least two microphones are respectively located on both sides of the hole along the second direction, and the microphones are electrically connected to the audio component through the mainboard. The neck-mounted device according to claim 3, wherein the neck-mounted device comprises at least two of the audio components, and the two audio components are located on both sides of the channel along the second direction; and In at least one of the audio components, at least one microphone is disposed on a side of the audio component close to the suspension area, and at least one microphone is disposed on a side of the audio component away from the suspension area. The neck-mounted device according to claim 4, wherein, in at least one of the audio components, the number of microphones located on a side of the audio component close to the suspension area is less than the number of microphones arranged on a side of the audio component away from the suspension area. The neck-mounted device according to claim 3, wherein at least two of the first cameras are arranged along the second The directions are symmetrically distributed on both sides of the hole; and/or, At least two of the microphones are symmetrically distributed on two sides of the hole along the second direction. A neck-mounted device according to any one of claims 1-6, wherein the shell has a first recessed portion, the first recessed portion is recessed toward the inner side of the shell, and the first hollow hole is located in the first recessed portion. According to any one of claims 1-7, the first camera includes an infrared camera, and the neck-worn device further includes a filter, the filter covers the first hollow hole, and the filter absorbs green light and blue light and allows red light and infrared light to pass through. A neck-worn device according to any one of claims 1-8, wherein the neck-worn device further comprises a plurality of second cameras located within the shell, the plurality of second cameras being arranged at intervals along a circumferential direction of the shell, the shooting fields of view of two adjacent second cameras partially overlapping, and the shell comprising a plurality of second hollow holes, the plurality of second hollow holes exposing at least a portion of the plurality of second cameras. The neck-mounted device according to claim 9, wherein the shell has an opening, and two ends of the shell are located on both sides of the opening along the second direction; and The multiple second cameras include two first sub-cameras and multiple second sub-cameras, the two first sub-cameras are respectively located on both sides of the opening along the second direction, and the multiple second sub-cameras are located between the two first sub-cameras and are spaced apart along the circumferential direction of the shell; Among them, the distance between two adjacent second sub-cameras is basically equal to the distance between another two adjacent second sub-cameras, and/or the distance between two adjacent second sub-cameras is basically equal to the distance between the first sub-camera and the adjacent second sub-camera. The neck-mounted device according to claim 10, wherein the main optical axes of two adjacent second sub-cameras intersect, and/or the main optical axis of the first sub-camera intersects with the main optical axis of the adjacent second sub-camera. The neck-mounted device according to claim 11, wherein the angle between the main optical axes of two adjacent second sub-cameras is substantially equal to the angle between the main optical axes of another two adjacent second sub-cameras, and/or The included angle of the main optical axes of the two second sub-cameras and the included angle of the main optical axes of the first sub-camera and the adjacent second sub-camera are substantially equal. A neck-mounted device according to any one of claims 10-12, wherein directions of main optical axes of the two first sub-cameras are substantially parallel. A neck-mounted device according to any one of claims 10-13, wherein the second hollow hole exposing the second sub-camera is located on a side of the shell away from the channel; and/or the second hollow hole exposing the first sub-camera is located on a side of the shell close to the opening. A neck-mounted device according to any one of claims 10-14, wherein the imaging planes of at least two of the second cameras are substantially parallel to the same straight line, and/or the horizontal field of view directions of at least two of the second cameras are substantially perpendicular to the same straight line. A neck-worn device according to any one of claims 10-15, wherein the neck-worn device further comprises a third camera, wherein the third camera is located in the shell and electrically connected to the mainboard, the shell has a third hollow hole, the third hollow hole exposes at least a portion of the third camera, the third camera is arranged adjacent to the first sub-camera, and the main optical axis of the third camera forms a preset angle with the main optical axis of the first sub-camera. The neck-mounted device according to claim 16, wherein the neck-mounted device also includes two of the third cameras, and the two third cameras are arranged adjacent to the two first sub-cameras, respectively, and in the adjacent third cameras and the first sub-cameras, the field of view of the third camera partially overlaps with the shooting field of view of the first sub-camera. The neck-mounted device according to claim 16 or 17, wherein a plane defined by a principal optical axis of one of the third cameras and a principal optical axis of an adjacent first sub-camera is substantially parallel to a plane defined by a principal optical axis of another third camera and a principal optical axis of an adjacent first sub-camera; and/or The main optical axis of the third camera forms an acute angle with the main optical axis of the adjacent first sub-camera. A neck-worn device according to any one of claims 10-18, wherein the neck-worn device further comprises a heat dissipation component, wherein the heat dissipation component is located on a side of the mainboard away from the hole, wherein the heat dissipation component comprises a heat dissipation fan, wherein the heat dissipation fan is configured to discharge air in a direction away from the mainboard, and wherein a plurality of air inlet hollow portions are arranged at intervals on a side of the shell close to the hole, and a plurality of air outlet hollow portions are arranged at intervals on a side of the shell away from the hole. The neck-mounted device according to claim 19, wherein the size of the air inlet hollow portion is larger than the size of the air outlet hollow portion. According to the neck-worn device according to claim 19 or 20, the multiple air outlet hollow portions are located on the side of the heat dissipation component away from the mainboard, the side of the shell close to the channel has a wind shield portion, the wind shield portion is located on the side of the mainboard close to the channel, and the multiple air inlet hollow portions are arranged around the wind shield portion. The neck-mounted device according to claim 21, wherein the plurality of air inlet hollow portions are located on one side of the wind shield portion along the second direction and are arranged at intervals in a direction close to the opening. According to the neck-mounted device according to claim 22, wherein the hollow shape of the air inlet hollow portion includes a long strip, and in the multiple air inlet hollow portions located between the wind shield portion and the opening, the extension direction of the air inlet hollow portion forms an acute angle with the extension direction of the opening toward the wind shield portion. According to the neck-mounted device according to claim 22, wherein the plurality of air inlet hollow portions include a first air inlet portion and a second air inlet portion, the first air inlet portion is located between the second air inlet portion and the wind shield portion, and the distribution density of the air inlet hollow portions in the first air inlet portion is less than the distribution density of the air inlet hollow portions in the second air inlet portion. A neck-worn device, wherein the neck-worn device comprises: A shell, the shell is arranged around and has a hole located in the middle of the shell; A mainboard, located inside the housing; and A plurality of second cameras are located inside the housing, and the second cameras are electrically connected to the mainboard; The plurality of second cameras are spaced apart along the circumferential direction of the housing, the shooting fields of two adjacent second cameras partially overlap, and the housing has a plurality of second hollow holes, which expose At least a portion of the plurality of second cameras. A wearable device, wherein the wearable device comprises a neck-mounted device according to any one of claims 1-25.