WO2022260272A1 - Head-mounted display device adjusting interpupillary distance by moving binocular lenses simultaneously in rack-and-pinion method - Google Patents

Abstract

According to a head-mounted display device adjusting an interpupillary distance by moving binocular lenses simultaneously in a rack-and-pinion method, an IPD adjustment part for adjusting an interpupillary distance by moving a pair of lens parts simultaneously in a rack-and pinion method is installed at an optical portion including the pair of lens parts for a binocular display. Therefore, when one lens part is moved by one hand, the opposite lens simultaneously moves in the opposite direction, so that a user can easily adjust an interpupillary distance by only one hand.

Description

A head-mounted display device that adjusts the interpupillary distance by simultaneously moving the lenses of both eyes in a rack and pinion method

The present invention relates to a head-mounted display device, and more particularly, to a head-mounted display device in which binocular lenses are simultaneously moved in a rack and pinion manner to adjust an interpupillary distance.

Various wearable devices are being developed according to the trend of light weight and miniaturization of digital devices. A head mounted display, which is a kind of wearable device, refers to various devices that can be worn on a user's head to receive multimedia contents and the like. Here, the head mounted display (HMD) is worn on the user's body and provides images to the user in various environments as the user moves. Head-mounted displays (HMDs) are classified into see-through and see-closed types. The see-through type is mainly used for Augmented Reality (AR), and the closed type is mainly used for virtual reality (VR). reality, VR).

The head mounted display may include a monocular lens, but may also include a binocular lens providing an image to both eyes. In particular, in a binocular HMD that provides images to both eyes, since the distance between the pupils is different for each wearer, the distance between the pupils must be easily adjusted to suit the wearer in order to experience a well-focused and clear image.

However, most HMD products for augmented reality or virtual reality have a fixed interpupillary distance (IPD), or are designed so that both eyes are not adjusted simultaneously, but are adjusted individually, even if the interpupillary distance is adjustable. Therefore, it is not easy to adjust the IPD when carrying a load or holding a control device such as a joystick in your hand. Therefore, it is necessary to develop a technology that can precisely adjust the IPD with one hand.

Meanwhile, as a prior art related to the present invention, Patent Publication No. 10-2019-0093966 (Title of Invention: HMD Device and Operation Method Thereof, Publication Date: August 12, 2019) has been disclosed.

The present invention has been proposed to solve the above problems of the previously proposed methods, and the interpupillary distance is obtained by simultaneously moving a pair of lens units in a rack and pinion method on an optical unit including a pair of lens units for a binocular display. By installing an IPD adjustment unit that adjusts the pupil, when one lens unit is moved with one hand, the opposite lens moves in the opposite direction at the same time, so that the wearer can easily adjust the interpupillary distance with just one hand. Its object is to provide a head-mounted display device that adjusts the inter-interval distance.

In order to achieve the above object, a head-mounted display device for adjusting an interpupillary distance by simultaneously moving binocular lenses in a rack and pinion method according to a feature of the present invention,

As a head-mounted display device,

an HMD frame that a user can wear on their head;

an optical unit disposed in front of both eyes of the user wearing the HMD frame to provide augmented reality by combining real world light and image light, and including a pair of lens units for displaying both eyes; and

An IPD adjustment unit installed on the optical unit and adjusting an interpupillary distance (IPD) by simultaneously moving the pair of lens units in a rack and pinion manner,

The IPD adjustment unit,

a pair of racks fixedly connected to the pair of lens units; and

It is located between the pair of racks, and includes a pinion for moving the racks in opposite directions by rotation of the pair of racks crossing each other.

Preferably, the pair of racks,

It may be composed of a first rack and a second rack that are fixedly connected to the pair of lens units composed of a first lens unit and a second lens unit, respectively.

More preferably, the pair of racks,

Long-shaped holes may be formed at one end of the first rack and the second rack in a longitudinal direction, and teeth meshing with the pinion may be formed on one surface of the inside of the hole in the longitudinal direction.

Even more preferably, the pair of racks,

The pinion may be inserted through the holes of the first rack and the second rack, and teeth formed inside the holes of the first rack and the second rack may cross each other so as to face each other and engage the pinion.

Preferably,

A pair of display units coupled to the pair of lens units to output image light transmitted in a direction to the eyes of the user through the lens units may be further included so that image information may be provided to the user.

Preferably, the IPD adjusting unit,

An adjustment dial connected to the pinion to adjust rotation of the pinion may be further included.

Preferably,

The controller may further include a controller configured to adjust the interpupillary distance in a hands-free state by controlling rotation of the pinion according to a user's IPD control signal.

According to the head-mounted display device in which the lenses for both eyes move simultaneously in a rack-and-pinion manner to adjust the interpupillary distance proposed in the present invention, a rack-and-pinion method is provided on an optical unit including a pair of lens units for a binocular display. By installing an IPD adjustment unit that adjusts the interpupillary distance by moving the pair of lens units simultaneously, moving one lens unit with one hand moves the opposite lens simultaneously in the opposite direction, allowing the wearer to easily adjust the interpupillary distance with only one hand.

1 is a view showing the configuration of a head-mounted display device in which lenses for both eyes are simultaneously moved in a rack and pinion manner according to an embodiment of the present invention to adjust an interpupillary distance;

FIG. 2 is a view showing, for example, a frontal view of a head-mounted display device in which lenses for both eyes are simultaneously moved in a rack-and-pinion manner according to an embodiment of the present invention to adjust an interpupillary distance;

FIG. 3 is a view showing, for example, a state of wearing a head-mounted display device for adjusting an interpupillary distance by simultaneously moving lenses for both eyes in a rack-and-pinion manner according to an embodiment of the present invention;

4 is an exploded perspective view of a head-mounted display device in which lenses for both eyes are simultaneously moved in a rack-and-pinion manner according to an embodiment of the present invention to adjust an interpupillary distance, as an example;

5 is a view showing a detailed configuration of a rack in a head-mounted display device in which binocular lenses are simultaneously moved in a rack and pinion manner according to an embodiment of the present invention to adjust an interpupillary distance;

6 is an exploded view of an IPD adjustment unit in a head-mounted display device in which lenses for both eyes are simultaneously moved in a rack-and-pinion manner according to an embodiment of the present invention to adjust an interpupillary distance;

FIG. 7 is a view showing how an IPD is lengthened in a head-mounted display device in which an interpupillary distance is adjusted by simultaneously moving binocular lenses in a rack-and-pinion manner according to an embodiment of the present invention;

FIG. 8 is a view showing a state in which an IPD is adjusted briefly in a head-mounted display device in which an interpupillary distance is adjusted by simultaneously moving binocular lenses in a rack-and-pinion manner according to an embodiment of the present invention;

<Description of codes>

10: Head-mounted display device according to the features of the present invention

100: HMD frame

200: display unit

300: optics

310: first lens unit

320: second lens unit

400: IPD adjustment unit

410: rack

410a: first rack

410b: second rack

411: hall

412: teeth

420: pinion

430: adjustment dial

500: control unit

600: sensor unit

700: Ministry of Communications

Hereinafter, preferred embodiments will be described in detail so that those skilled in the art can easily practice the present invention with reference to the accompanying drawings. However, in describing a preferred embodiment of the present invention in detail, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description will be omitted. In addition, the same reference numerals are used throughout the drawings for parts having similar functions and actions.

In addition, throughout the specification, when a part is said to be 'connected' to another part, this is not only the case where it is 'directly connected', but also the case where it is 'indirectly connected' with another element in between. include In addition, 'including' a certain component means that other components may be further included, rather than excluding other components unless otherwise specified.

FIG. 1 is a diagram showing the configuration of a head-mounted display device 10 in which lenses for both eyes are simultaneously moved to adjust an interpupillary distance in a rack 410 and pinion 420 manner according to an embodiment of the present invention. As shown in FIG. 1 , the head-mounted display device 10 in which the interpupillary distance is adjusted by simultaneously moving the lenses of both eyes in a rack 410 and pinion 420 method according to an embodiment of the present invention includes an HMD frame (100), the optical unit 300, and the IPD adjustment unit 400, and may further include a display unit 200, a control unit 500, a sensor unit 600, and a communication unit 700. It can be.

The HMD frame 100 is a frame structure that can be worn on the head by a user. The HMD frame 100 may be configured in the form of a helmet, goggles, glasses, etc. having a frame structure through which light can enter while worn on the head by the user.

The display unit 200 may output image light so that image information may be provided to a user. More specifically, the display unit 200 is coupled to a pair of lens units constituting the optical unit 300 to be described in detail below so that image information can be provided to the user, and the display unit 200 is directed toward the user's eyes through the lens units. It outputs image light transmitted to and may be composed of a pair of display units 200 for binocular display. The display unit 200 may be configured in various ways such as OLED.

The optical unit 300 is disposed in front of both eyes of the user wearing the HMD frame 100 to provide augmented reality by combining real world light and image light, and may include a pair of lens units for displaying both eyes. can More specifically, the optical unit 300 is disposed in front of both eyes of the user wearing the HMD frame 100, transmits at least a part of light of the real world through the user's field of view, and displays the display unit ( 200) may provide augmented reality by transmitting the image light output in the direction of the user's eyes. That is, the optical unit 300 may be configured so that a user wearing the head-mounted display device 10 can experience augmented reality.

In addition, the optical unit 300 is composed of a plurality of lenses and mirrors and may be implemented in various ways, such as an optical diffraction method, a beam splitter method, a pin mirror method, and the like.

The IPD adjustment unit 400 is installed on the optical unit 300 and can adjust an interpupillary distance (IPD) by simultaneously moving a pair of lens units in a rack 410 and pinion 420 manner.

FIG. 2 shows, for example, a frontal view of a head-mounted display device 10 in which lenses for both eyes move simultaneously to adjust an interpupillary distance in a rack 410 and pinion 420 method according to an embodiment of the present invention. FIG. 3 is an example of wearing the head-mounted display device 10 for adjusting the interpupillary distance by simultaneously moving the lenses of both eyes in a rack 410 and pinion 420 method according to an embodiment of the present invention. 4 is a disassembly of a head-mounted display device 10 in which lenses for both eyes move simultaneously to adjust an interpupillary distance in a rack 410 and pinion 420 manner according to an embodiment of the present invention. It is a drawing showing a perspective view as an example.

That is, the IPD adjusting unit 400 is installed on a pair of lens units composed of a first lens unit 310 and a second lens unit 320 for binocular display, and uses a rack 410 and pinion 420 method. The interpupillary distance can be adjusted by moving a pair of lens units simultaneously. Therefore, when one lens unit is moved with one hand, the opposite lens unit moves simultaneously in the opposite direction, so that the wearer can easily adjust the interpupillary distance with only one hand.

Hereinafter, a detailed configuration and operation of the IPD adjuster 400 will be described in detail with reference to FIGS. 1 to 4 .

The IPD adjustment unit 400 includes a pair of racks 410 fixedly connected to a pair of lens units; and a pinion 420 positioned between the pair of racks 410 and moving the racks 410 in opposite directions by rotation of the pair of racks 410 crossing each other. At this time, the pair of racks 410 include a first rack 410a and a second rack 410b that are fixedly connected to the pair of lens units composed of the first lens unit 310 and the second lens unit 320, respectively. ) can be configured.

5 shows details of the rack 410 in the head-mounted display device 10 in which the interpupillary distance is adjusted by simultaneously moving the lenses of both eyes in a rack 410 and pinion 420 method according to an embodiment of the present invention. It is a drawing showing the configuration. As shown in FIG. 5 , the rack 410 of the head-mounted display device 10 for adjusting the interpupillary distance by simultaneously moving the lenses of both eyes in a rack 410 and pinion 420 method according to an embodiment of the present invention. ), a long hole 411 is formed at one end of the rack 410 in the longitudinal direction, and a tooth 412 engaged with the pinion 420 can be formed on one side of the longitudinal direction inside the hole 411. have.

Here, in the rack 410, as shown in FIGS. 2 to 4, the body portion where the hole 411 is not formed is fixedly coupled to the lens unit with screws or the like, and the hole 411 portion is the head-mounted display device. It may be positioned between the first lens unit 310 and the second lens unit 320 of (10), that is, above the wearer's nose. In addition, the size of the hole 411 has a width corresponding to the diameter of the pinion 420 so that the pinion 420 can be inserted and coupled, and a length within a range in which the rack 410 moves according to the adjustment of the distance between the pupils. The size of the hole 411 in the longitudinal direction may be determined according to the inter-pupillary distance adjustment range. The shape of the first rack 410a and the second rack 410b may be basically the same, and the position or direction where the hole 411 or sawtooth 412 is formed may be different from each other as needed.

6 is an exploded view of the IPD adjusting unit 400 in the head-mounted display device 10 in which the interpupillary distance is adjusted by simultaneously moving the lenses of both eyes in a rack 410 and pinion 420 method according to an embodiment of the present invention. It is a drawing showing As shown in FIG. 6 , in the head-mounted display device 10 for adjusting the interpupillary distance by simultaneously moving the lenses of both eyes in a rack 410 and pinion 420 manner according to an embodiment of the present invention, one pair In the rack 410, the pinion 420 is inserted through the holes 411 of the first rack 410a and the second rack 410b, and the holes of the first rack 410a and the second rack 410b. The teeth 412 formed inside 411 may cross each other so as to engage with the pinion 420 by facing each other. That is, in the coupled state, the teeth 412 of the first rack 410a and the teeth 412 of the second rack 410b face each other so that they are engaged in opposite directions of the pinion 420, so that the pinion 420 ) When rotating, the first rack 410a and the second rack 410b may move in different directions.

FIG. 7 shows how the IPD is lengthened in the head-mounted display device 10 in which the interpupillary distance is adjusted by simultaneously moving the lenses of both eyes in a rack 410 and pinion 420 method according to an embodiment of the present invention. FIG. 8 is a rack 410 and pinion 420 method according to an embodiment of the present invention, in the head-mounted display device 10 in which binocular lenses move simultaneously to adjust the interpupillary distance, IPD It is a drawing showing how to adjust briefly.

For example, as shown in FIG. 7 , the first rack 410a or the first lens unit 310 fixedly coupled to the first rack 410a is moved outward (opposite to the pinion 420, toward the wearer's ear). ), the pinion 420 rotates counterclockwise to move the second rack 410b outward. Accordingly, both the first rack 410a and the second rack 410b move in a direction away from the pinion 420, so that the distance between the pupils increases.

In addition, as shown in FIG. 8 , the first rack 410a or the first lens unit 310 fixedly coupled to the first rack 410a is moved inward (to the pinion 420 side, to the wearer's nose side). If so, while the pinion 420 rotates clockwise, the second rack 410b is also moved inward. Therefore, both the first rack 410a and the second rack 410b move close to the pinion 420, so that the distance between the pupils becomes closer.

Here, although the first rack 410a has been described as an example, when the second rack 410b is manipulated, the first rack 410a may be simultaneously moved.

Meanwhile, the IPD adjustment unit 400 may further include an adjustment dial 430 connected to the pinion 420 to adjust rotation of the pinion 420 . That is, the adjustment dial 430 is configured so that the wearer can directly rotate the pinion 420, and can be exposed to the outer surface of the HMD frame 100 and manipulated. Accordingly, the wearer may adjust the interpupillary distance by manipulating the adjustment dial 430 in addition to moving the first lens unit 310 or the second lens unit 320 . At this time, if the adjustment dial 430 is simply turned with one hand, the first lens unit 310 and the second lens unit 320 move simultaneously in opposite directions to adjust the IPD, so the interpupillary distance can be easily adjusted with only one hand. have.

The controller 500 may control the rotation of the pinion 420 according to the user's IPD adjustment signal to adjust the interpupillary distance in a hands-free state. That is, a motor may be connected to the pinion 420 and the control unit 500 may rotate the pinion 420 by controlling the motor according to the user's IPD control signal. Through the control of the control unit 500, the wearer can adjust the interpupillary distance by inputting an IPD adjustment signal without directly manipulating the lens unit or the IPD adjustment unit 400. Here, as a method for the user to input the IPD control signal, gestures, voice commands, and the like can be used.

The sensor unit 600 may include at least one or more sensors, and more specifically, may include a pupil tracking sensor and an iris recognition sensor. Depending on the embodiment, the controller 500 controls the motor connected to the pinion 420 according to the pupil position of the wearer collected by the sensor unit 600 to automatically adjust the distance between pupils in a hands-free state without using hands. can

Meanwhile, according to an embodiment, the controller 500 matches and stores the inter-pupillary distance adjusted according to the user's IPD adjustment signal or the manually adjusted inter-pupillary distance with user authentication information, and allows the user to select the HMD frame 100. When worn and user authentication is performed, the interpupillary distance matched with the user authentication information may be automatically adjusted. In this case, user authentication may use an iris recognition sensor included in the sensor unit 600 .

The communication unit 700 is installed on one side of the HMD frame 100 and can transmit and receive various signals and data to other head-mounted display devices 10 or servers. Here, the network used by the communication unit 700 is a wired network or a mobile communication network such as a Local Area Network (LAN), a Wide Area Network (WAN), or a Value Added Network (VAN). radio communication network), satellite communication network, Bluetooth, Wibro (Wireless Broadband Internet), HSDPA (High Speed Downlink Packet Access), LTE (Long Term Evolution), 3/4/5G (3/4/5th Generation Mobile Telecommunication ) can be implemented in all types of wireless networks, such as

As described above, according to the head-mounted display device 10 for adjusting the interpupillary distance by simultaneously moving the lenses for both eyes in the rack 410 and pinion 420 method proposed in the present invention, one pair for the binocular display An IPD adjusting unit 400 for adjusting the interpupillary distance by simultaneously moving a pair of lens units in a rack 410 and pinion 420 method is installed on the optical unit 300 including the lens unit, and one lens unit can be operated with one hand. When it is moved, the opposite lens moves simultaneously in the opposite direction, allowing the wearer to easily adjust the interpupillary distance with just one hand.

The present invention described above can be variously modified or applied by those skilled in the art to which the present invention belongs, and the scope of the technical idea according to the present invention should be defined by the claims below.

Claims (7)

As a head-mounted display device 10, An HMD frame 100 that can be worn on the head by a user; an optical unit 300 disposed in front of both eyes of the user wearing the HMD frame 100 to provide augmented reality by combining real world light and image light, and including a pair of lens units for displaying both eyes; and An IPD adjustment unit 400 installed on the optical unit 300 and adjusting an interpupillary distance (IPD) by simultaneously moving the pair of lens units in a rack 410 and pinion 420 manner, The IPD adjustment unit 400, a pair of racks 410 fixedly connected to the pair of lens units; and It is located between the pair of racks 410, characterized in that it includes a pinion 420 for moving the racks 410 in opposite directions by rotation by crossing the pair of racks 410 , A head-mounted display device 10 in which lenses for both eyes move simultaneously in a rack 410 and pinion 420 manner to adjust an interpupillary distance. The method of claim 1, wherein the pair of racks 410, Characterized in that it consists of a first rack 410a and a second rack 410b fixedly connected to the pair of lens units composed of the first lens unit 310 and the second lens unit 320, respectively. A head-mounted display device (10) in which lenses for both eyes are simultaneously moved in the manner of (410) and pinion (420) to adjust the interpupillary distance. The method of claim 2, wherein the pair of racks 410, Long-shaped holes 411 are formed at ends of the first rack 410a and the second rack 410b in the longitudinal direction, and one surface of the inside of the hole 411 in the longitudinal direction is aligned with the pinion 420. A head-mounted display device (10) in which the interpupillary distance is adjusted by simultaneously moving the lenses of both eyes in a rack (410) and pinion (420) manner, characterized in that engaging teeth (412) are formed. The method of claim 3, wherein the pair of racks 410, The pinion 420 is inserted through the holes 411 of the first rack 410a and the second rack 410b, and the hole 411 of the first rack 410a and the second rack 410b Characterized in that the teeth 412 formed therein face each other and cross each other so as to engage with the pinion 420, the rack 410 and the pinion 420 are used to simultaneously move both eye lenses to adjust the interpupillary distance. mold display device (10). According to claim 1, And a pair of display units 200 coupled to the pair of lens units to output image light transmitted in the direction of the user's eyes through the lens units so that image information can be provided to the user. A head-mounted display device 10 in which lenses for both eyes move simultaneously in a rack 410 and pinion 420 manner to adjust an interpupillary distance. The method of claim 1, wherein the IPD adjustment unit 400, Characterized in that it further includes an adjustment dial 430 connected to the pinion 420 to adjust the rotation of the pinion 420, the rack 410 and the pinion 420 simultaneously move the binocular lenses to move the pupil gap. A head-mounted display device (10) that adjusts the distance. According to claim 1, The rack 410 and the pinion 420 further comprising a control unit 500 for controlling the rotation of the pinion 420 according to a user's IPD adjustment signal and adjusting the interpupillary distance in a hands-free state. A head-mounted display device 10 in which lenses for both eyes move simultaneously to adjust an interpupillary distance.

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