WO2016052136A1 - Head-mounted display - Google Patents

Abstract

The present invention makes it possible to ensure appropriate rigidity in a frame that is mounted on a human head and ensure the fit of said frame to the human head. This head-mounted display is provided with: an image display unit that includes an image display member that is disposed in front of the right eye or in front of the left eye of a wearer; and a frame that is mounted on the head of the wearer. The frame includes a front portion, left and right temple portions, and left and right corner connecting portions, and supports the image display unit at a right front portion or left front portion. The right corner connecting portion and left corner connecting portion are configured to be more susceptible to elastic deformation than the right front portion and left front portion due to the fact that the frame, when viewed from the right front portion along the right corner connecting portion, is integrally continuous and changes in cross-sectional shape, and, when viewed from the left front portion along the left corner connecting portion, is integrally continuous and changes in cross-sectional shape.

Description

Head mounted display

The present invention relates to a head-mounted display.

In recent years, a head-mounted display that is worn on the head of a human body and allows the wearer to visually recognize an image, and a wearable computer using the head-mounted display have been developed. If the head-mounted display is connected to a mobile computer, a computer graphic screen is formed as a virtual image in front of the user's eyes, thus providing a wearable computer that can be mounted on the user's head.
As a specific form of the head-mounted display, there is one in which a device is supported on a spectacle-shaped frame as described in Patent Document 1. Further, as described in Patent Document 1, there is a form of a monocular head mounted display in which an image display unit is arranged on one eye side.
A frame mounted on the human head of the head-mounted display described in Patent Document 1 includes a main frame that abuts on the wearer's frontal head and a left rear that is rotatably coupled to the main frame by a left hinge portion. The frame includes a right rear frame rotatably coupled to the main frame by a right hinge portion. In Patent Document 1, the engineering plastic containing carbon constituting the main frame is excellent in rigidity, so that distortion is prevented, and the elastic force of the plastic material such as polyamide constituting the rear frame as a whole is provided. The position is regulated with respect to the wearer's head.

Japanese Patent Laid-Open No. 11-149003

However, the above prior art has the following problems.
In the invention described in Patent Document 1 described above, the main frame and the rear frame are connected to each other by a connecting mechanism in spite of being a monocular type in which the weight balance is easily lost. Since this is a material that is easily deformed, there is a risk that the wearing position will shift with respect to the head of the wearer during wearing. For example, the left rear frame may bend due to the load of the image display unit arranged on the left side, and the mounting position may be shifted so that the left end of the main frame falls. If such a shift occurs, the image display position will be lowered. Therefore, it becomes impossible to maintain and stabilize the visibility of the screen.
Accordingly, rigidity is required for both the main frame, that is, the front portion disposed on the front side of the human head and the rear frame, that is, the temple portion.
However, if the rigidity of the entire frame is increased, it is not possible to realize fitability due to elastically recoverable deformation that widens the distance between the left and right temple parts, and there is a certain amount corresponding to individual differences. It is difficult to achieve wearability. Depending on the size of the wearer's head, there is a risk of looseness of wearing and excessive feeling of pressure.

The present invention has been made in view of the above-described problems in the prior art, and improves wearability by ensuring appropriate rigidity of the frame to be worn on the human head and fit to the human head. In addition, it is an object of the present invention to provide a monocular head-mounted display that can maintain and stabilize the visibility of the screen.

An invention according to claim 1 for solving the above-described problems includes an image display member disposed in front of the right eye or the left eye of the wearer, and an image generation unit for generating an image displayed on the image display member. And an image display unit in which the base end portion of the image display member and the image generation unit are accommodated in the housing.
A right front part and a left front part, a right temple part, a left temple part, and the right temple part and the right front part, which are attached to the wearer's head and arranged on the front side of the wearer's head. A right corner connecting portion, a left corner connecting portion that connects the left temple portion and the left front portion, and a frame that supports the image display unit on the right front portion or the left front portion,
The right front part and the right corner connecting part are integral, the right corner connecting part is provided with a right concave part extending in the extending direction of the frame, and the left front part and the left corner connecting part are The head-mounted display is a one-piece display, and the left corner connecting portion is provided with a left-side recess extending in the extending direction of the frame.

According to a second aspect of the present invention, the right front portion is disposed at a position higher than the right temple portion with respect to the wearer's head, and the right corner connecting portion rises from the right temple portion to the right front portion. The left front portion is disposed higher than the left temple portion with respect to the wearer's head, and the left corner connecting portion rises from the left temple portion to the left front portion. The head-mounted display according to claim 1, which constitutes a formed connecting portion.

According to a third aspect of the present invention, the frame is restricted by a hingeless frame or the right temple portion being opened to the right corner connecting portion and the left temple portion being opened to the left corner connecting portion up to a certain angle. The head-mounted display according to claim 1, wherein the head-mounted display is a foldable frame hinged to the frame.

According to a fourth aspect of the present invention, the right concave portion is provided by an opening formed in the right corner connecting portion, and the left concave portion is provided by an opening formed in the left corner connecting portion. A head-mounted display according to claim 2 or claim 3.

According to a fifth aspect of the present invention, either the right front portion or the left front portion is connected to the casing of the image display unit or its support member in parallel in the eye width direction, and the other is reinforced. The head mounted display according to any one of claims 1 to 4, wherein a structure portion is formed.

According to a sixth aspect of the present invention, a casing capable of storing electronic components is attached to the right temple portion, and a casing capable of storing electronic components is attached to the left temple portion. It is a head mounted display as described in any one of them.

According to the present invention, in the head-mounted display, the right corner connecting portion and the left corner connecting portion are configured to be more easily elastically deformed than the right front portion and the left front portion. It is possible to generate elastically recoverable deformation that widens the distance between the left and right temple portions with the amount of elastic deformation as a main factor, and thereby it is possible to realize fitability with a fit.
In addition, the rigidity of the front part and temple part can be increased, preventing distortion of the entire frame due to the load of the image display unit when attached, and maintaining the position of the image display unit etc. while being a monocular head mounted display. It is possible to maintain and stabilize the visibility of the screen.

1 is an external view of the entire system of a wearable computer including a head mounted display according to an embodiment of the present invention. It is the perspective view seen from the back side of the head mounted display concerning one embodiment of the present invention. It is the perspective view seen from the front side of the head mounted display concerning one embodiment of the present invention. It is the perspective view seen from the front side of the head mounted display concerning one embodiment of the present invention, and shows the state where the earphone unit was removed. It is a front view of the head mounted display concerning one embodiment of the present invention. Illustration of the external connection cable is omitted. It is a top view of the head mounted display concerning one embodiment of the present invention. Illustration of the external connection cable is omitted. It is a bottom view of the head mounted display concerning one embodiment of the present invention. Illustration of the external connection cable is omitted. It is a left view of the head mounted display concerning one embodiment of the present invention. Illustration of the external connection cable is omitted. It is a right view of the head mounted display which concerns on one Embodiment of this invention. Illustration of the external connection cable is omitted. It is a perspective view of the earphone unit concerning one embodiment of the present invention. It is a front view of the earphone unit which concerns on one Embodiment of this invention. The front view of the part containing the image display unit of the head mounted display which concerns on one Embodiment of this invention shows the state which removed the outer cover. The intermediate cable and spectacle lens (eye shield) are not shown. The state which removed the outer cover is a right view of the part containing the image display unit of the head mounted display which concerns on one Embodiment of this invention. The intermediate cable, spectacle lens (eye shield), and nose pad are not shown. FIG. 2 is a bottom view of a portion including an image display unit of a head mounted display according to an embodiment of the present invention, showing a state where an outer cover is removed. The intermediate cable and spectacle lens (eye shield) are not shown. FIG. 3 is a top view of a portion including an image display unit of a head mounted display according to an embodiment of the present invention, with an upper surface of an outer cover being opened. It is a rear view of the part containing the image display unit of the head mounted display which concerns on one Embodiment of this invention. Illustration of the spectacle lens (eye shield) is omitted. It is a bottom view of the part containing the image display unit of the head mounted display which concerns on one Embodiment of this invention. Illustration of the spectacle lens (eye shield) is omitted. 1 is a perspective view of an image display unit of a head mounted display according to an embodiment of the present invention, in which a half body of a housing is removed. It is an optical axis direction sectional view of an image display unit of a head mounted display concerning one embodiment of the present invention. It is a block diagram of the main circuits of the whole wearable computer including the head mounted display concerning one Embodiment of this invention. It is YZ sectional drawing which cut | disconnects in the center position of the left eyeglass lens (eye shield) of the head mounted display which concerns on one Embodiment of this invention, and observes the right side. It is a cross-sectional schematic diagram of the left front part of the frame of the head mounted display which concerns on one Embodiment of this invention, and shows one form of cross-sectional shape. It is a cross-sectional schematic diagram of the left front part of the frame of the head mounted display which concerns on one Embodiment of this invention, and shows another form of cross-sectional shape. It is a cross-sectional schematic diagram of the left front part of the frame of the head mounted display which concerns on one Embodiment of this invention, and shows another form of cross-sectional shape.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. The following is one embodiment of the present invention and does not limit the present invention.

[Outline of Embodiment]
(Whole system)
FIG. 1 is an external view depicting the entire system of a wearable computer including the head mounted display 1 of the present embodiment.
As shown in FIG. 1, the head mounted display 1 of this embodiment includes an image display unit 10 including an image display member 2 on a glasses-type frame 20 worn on the head of a wearer, and a relay circuit board (not shown). ) Including the relay unit 60 and the earphone unit 70, and can be connected to the mobile computer 100 by the external connection cable 61 extending from the relay unit 60, thereby forming a wearable computer. The A connector 61 a that can be connected to the mobile computer 100 is provided at the end of the external connection cable 61. The relay unit 60 and the image display unit 10 are connected via an intermediate cable 38.
Power is supplied from the mobile computer 100 to the relay unit 60 via the external connection cable 61, and further, power is supplied to the image display unit 10 via the relay unit 60 (relay circuit board) and the intermediate cable 38.

Further, an image signal is transmitted from the mobile computer 100 to the image display unit 10 via the external connection cable 61, the relay unit 60 (relay circuit board), and the intermediate cable 38, and an image output from the mobile computer 100 is the image display unit. 10 is displayed to the wearer.
In addition, the image display unit 10 includes the front photographing camera 4, and a photographed image of the front photographing camera 4 is transferred to the mobile computer 100 via the intermediate cable 38, the relay unit 60 (relay circuit board), and the external connection cable 61. Is input.
In addition, the relay unit 60 includes sensors, and detection signals of the sensors are input to the mobile computer 100 via the relay circuit board and the external connection cable 61.
Further, control signals for instructing display on / off of the image display unit 10, display settings such as display brightness and contrast, sensitivity setting of the front photographing camera 4, and the like are transmitted from the mobile computer 100 to the external connection cable 61 and the relay unit 60 ( Input to the image display unit 10 through the intermediate circuit board) and the intermediate cable 38.
If necessary, control signals for instructing on / off of the sensors mounted on the relay unit 60, sensitivity setting, etc. are mounted on the relay unit 60 from the mobile computer 100 via the external connection cable 61 and the relay circuit board. Is input to the sensors.
The earphone unit 70 is connected to the mobile computer 100 by wireless communication, receives an audio signal output from the mobile computer 100, and outputs audio.

The mobile computer 100 includes a battery, a CPU, a ROM, a RAM, a storage device, and the like.
In addition to the wireless communication device that performs wireless communication with the earphone unit 70, the mobile computer 100 is equipped with a wireless communication device that communicates with an external computer such as an Internet server and can download application programs and contents. ing. Therefore, the content generated by the application program and the downloaded image can be output from the mobile computer 100 to the image display unit 10 and displayed, and the audio can be output from the mobile computer 100 to the earphone unit 70 to be output as audio. Can be made.
In addition to the sensors mounted on the relay unit 60, the front display camera 4 and the proximity sensor 6 are provided on the image display unit 10, and detection signals from these sensors are input to the mobile computer 100. A program including a calculation based on the detected signal can be executed by the CPU of the mobile computer 100.

The proximity sensor 6 included in the image display unit 10 is a sensor that detects the presence or movement of an object in the detection region in the proximity range in the front (Y direction when viewed from the image display unit 10) without contact. A detection signal for detecting the presence and movement of the user's hand can be input to the mobile computer 100 via the proximity sensor 6, and the operation command corresponding to the shape and movement of the hand (such as the movement of the fingertip) by the CPU of the mobile computer 100. The gesture input function that recognizes can be configured. Therefore, the wearer can input and operate an operation command to the mobile computer 100 by making a specific gesture with his / her hand in front of his / her eyes on which the image display unit 10 is arranged. Note that the object to be instructed may be a user's hand, fingers, or an object such as an indicator bar held by the user. The proximity range is preferably set to about 200 mm from the detection surface of the proximity sensor 6 so that the mobile computer 100 can be instructed while reliably grasping the position of the user's hand near the user's face. As the proximity sensor 6, a known sensor such as a passive proximity sensor or an active proximity sensor can be used. Proximity sensors are generally smaller and cheaper than cameras, and consume less power. The proximity sensor cannot perform complicated detection such as detection of the shape of the object, but can determine the approach or separation of the object, so that the HMD is operated by passing the hand or holding the hand. In addition, complicated image processing required for gesture recognition by analysis of the image captured by the camera is also unnecessary.

Here, the passive proximity sensor has a detection unit that detects invisible light and electromagnetic waves emitted from the object when the object approaches. As a passive proximity sensor, there are a pyroelectric sensor that detects invisible light such as infrared rays emitted from an approaching human body, and a capacitance sensor that detects a change in electrostatic capacitance between the approaching human body. The active proximity sensor includes an invisible light or sound wave projection unit, and a detection unit that receives the invisible light or sound wave reflected and returned from the object. Active proximity sensors include infrared sensors that project infrared rays and receive infrared rays reflected by objects, laser sensors that project laser beams and receive laser beams reflected by objects, and project ultrasonic waves. Then, there is an ultrasonic sensor that receives ultrasonic waves reflected by an object. Passive proximity sensors are excellent in low power consumption. Moreover, the active proximity sensor can easily improve the detection reliability, and can detect even when the user is wearing gloves, for example. A plurality of types of proximity sensors may be used in combination. When a proximity sensor in which a plurality of detection units are arranged side by side is used, the direction of movement of an object with respect to the detection region can also be detected. In addition, it is possible to detect the direction in which the object approaches or separates from the detection region from the intensity of the output from the detection unit.

(Head mounted display)
2 and 3 are perspective views of the head mounted display 1 as seen from different directions. FIG. 4 shows a state in which the earphone unit is removed from FIG. Further, FIGS. 5 to 9 show an overall five-side view of the head-mounted display 1, and FIGS. 10 and 11 show a single view of the earphone unit. 12 to 18 show details of the image display unit and its support mechanism. In the figure, a common orthogonal three-axis XYZ is shown. With reference to the wearer's head, X indicates the left-right direction (eye width direction), Y indicates the front-rear direction, and Z indicates the vertical direction.
Hereinafter, the reference numerals shown in these drawings are attached for explanation.

The head mounted display 1 of the present embodiment includes an image display member 2, an image generation unit 3, a front photographing camera 4, a first housing 5, a proximity sensor 6 and the like as shown in FIGS. An image display unit 10, a frame 20 to be mounted on the wearer's head, a support member 30 of the image display unit 10, coil springs 31 and 32 as urging members, rotating shaft members 33 and 34, The fixing rings 35 and 36 and the outer cover 37 are provided.

The image display member 2 and the image generation unit 3 are fixed to the first housing 5. The first casing 5 accommodates the base end portion 2a of the image display member 2, the image generation unit 3, and the front photographing camera 4. The image display member 2 is disposed in front of the wearer's eye, and in the present embodiment, the image display member 2 is disposed in front of the wearer's right eye. The image generation unit 3 includes a light source such as an LED for generating an image displayed on the image display member 2, a display element such as a liquid crystal display element, a condensing lens, and the like. To enter. The image light incident on the image display member 2 is reflected by the optical element 19 installed on the inclined surface in the image display member 2, is emitted from the inner side surface 17b, and enters the wearer's pupil (see FIG. 13). The image display member 2 protrudes from the first housing 5 and constitutes a see-through type display member that can transmit light from the outside and enter the pupil of the wearer.

The frame 20 supports and supports the image display unit 10 via the rotation shaft members 33 and 34 and the support member 30 extending in the eye width direction (X direction). The image display unit 10 is supported by a support member 30, and both end portions of the support member 30 are connected to rotating shaft members 33 and 34, respectively. The support member 30 rotates with respect to the frame 20 around the rotation shaft members 33 and 34 integrally with the image display unit 10 (that is, rotates around the rotation shaft extending in the eye width direction). Thereby, the tilt angle of the image display member 2 can be adjusted. Further, the image display unit 10 is supported so as to be slidable in the eye width direction with respect to the support member 30, and thereby the position of the image display member 2 in the eye width direction can be adjusted. Details of the rotation mechanism and the slide mechanism will be described later.

As shown in FIGS. 2 and 3, the frame 20 includes a pair of temple portions (a right temple portion 21 </ b> R and a left temple portion 21 </ b> L) that are hung on a wearer's ear, a front portion 24, a right temple portion 21 </ b> R, and a front portion. 24 (the right end of the right front portion 24R) and a right corner connecting portion 25R that connects the left temple portion 21L and the front portion 24 (the left end of the left front portion 24L). It is configured. Thereby, this head mounted display 1 can be mounted | worn with a wearer's head with the form similar to spectacles.
Of the frame 20, the right corner connecting portion 25R, the right front portion 24R, the left front portion 24L, and the left corner connecting portion 25L are formed by bending a plate-shaped sheet metal or welding plate-shaped parts. It is configured as a unitary object. Further, the entire frame 20 is integrally coupled or integrally molded to form a hingeless frame, or the connection between the right temple portion 21R and the right corner connection portion 25R and the left temple portion 21L and the left corner connection portion. The connection with 25L is a foldable frame with hinge connection. In the case of a foldable frame, the right temple portion 21R and the left temple portion 21L have a fixed angle shown in FIGS. 1 to 9 (for example, an angle of 80 to 110 ° with respect to the arrangement direction of the spectacle lenses 23L and 23R). When it is opened, the hinge is connected so that further opening is restricted. In any case, in the present embodiment, for example, a plate-shaped member made of a metal or an alloy such as stainless steel, titanium, or aluminum is used, and the most part of the frame 20 moves the plate-shaped member in the vertical direction (Z Since it is assembled so as to stand in the direction), it has high rigidity in the Z direction.
Nose pads 22L and 22R applied to the wearer's nose and eyeglass lenses or eye shields 23L and 23R are connected and fixed to the front portion 24.

The front part 24 is a part disposed on the front side of the wearer's head. Of the front part 24, the right half is the right front part 24R and the left half is the left front part 24L.
In the present embodiment, the image display member 2 is disposed in front of the right eye of the wearer, the image display unit 10 is disposed on the right front portion 24R, and the earphone unit 70 is disposed on the left temple portion 21L. Further, the relay unit 60 is disposed in the right temple portion 21R.
As a form of displaying an image for the left eye, the present embodiment is reversed in the left-right direction, that is, the image display member 2 is disposed in front of the left eye of the wearer, the image display unit 10 is disposed in the left front portion 24L, and The embodiment in which the earphone unit 70 is disposed in the right temple portion 21R can be similarly implemented. In this case, the relay unit 60 is disposed in the left temple portion 21L.

(Mechanical structure and properties of the frame)
The mechanical structure and properties of other frames 20 will be described.
An opening 25Ra is formed in the right corner connecting portion 25R. That is, the right corner connecting portion 25R is provided with a right concave portion extending in the extending direction of the frame 20 by the opening 25Ra. Thereby, when it observes from the right front part 24R to the right corner connection part 25R, a change in the cross-sectional shape occurs while being continuously integrated. This is to make the right corner connecting portion 25R more easily elastically deformed than the right front portion 24R, and the bending rigidity when an external force is applied to open both the temple portions 21L and 21R is relatively relatively large. The lower corner connecting portion 25R is configured to be lowered.
Similarly, an opening 25La is formed in the left corner connecting portion 25L. That is, the left corner connecting portion 25L is provided with a left concave portion extending in the extending direction of the frame 20 by the opening 25La. Thereby, when it observes from the left front part 24L to the left corner connection part 25L, the cross-sectional shape changes while being continuously integrated. This is to make the left corner connecting portion 25L more easily elastically deformed than the left front portion 24L, and in particular, the bending rigidity when an external force is applied to open both the temple portions 21L and 21R is relatively high. The left corner connecting portion 25L is configured to be lowered.
Therefore, it is possible to generate elastically recoverable deformation that increases the distance between the left and right temple portions 21L and 21R mainly due to the elastic deformation amount of the right corner connecting portion 25R and the left corner connecting portion 25L. It is possible to realize a certain wearability.
The openings 25La and 25Ra may or may not be penetrated. If they do not penetrate, the openings 25La and 25Ra may be provided on both the front and back sides or on one side. Reducing the rigidity at the right corner connecting portion 25R and the left corner connecting portion 25L by tracing from the front portion 24 is a method of forming the right and left concave portions that reduce the cross-sectional area by forming the openings 25La and 25Ra as described above. In addition, it can be achieved by a method of providing a right recess and a left recess that reduce the cross-sectional area by reducing the thickness in a form that is not an opening, or a combination thereof. You may use together the method of reducing the cross-sectional area by reducing the width | variety in the direction which cross | intersects the frame extension direction of the right corner connection part 25R and the left corner connection part 25L.

In the frame 20, the right front portion 25 </ b> R is disposed higher than the right temple portion 21 </ b> R (upward position in the Z direction) with respect to the wearer's head. Therefore, a portion that rises from the right temple portion 21R to the right front portion 24R and is connected to the right front portion 24R is required, and this portion is constituted by the right corner connecting portion 25R.
Similarly, the left front portion 25L is disposed at a position higher than the left temple portion 21L with respect to the wearer's head (upward position in the Z direction). Therefore, a portion that rises from the left temple portion 21L to the left front portion 24L and is connected to the left front portion 24L is required, and this portion is constituted by the left corner connecting portion 25L.
The right corner connecting portion 25R is formed to rise and become longer, and the opening 25Ra can be formed longer. The left corner connecting portion 25L is raised and formed longer, and the opening 25La can be formed longer.
Accordingly, when a load is applied to both the temple portions 21L and 21R, the total deformation amount (bending angle) of the corner connecting portions 25L and 25R can be increased, and this deformability realizes a fit with a fit. can do. In the present embodiment, the openings 25La and 25Ra are formed such that the opening width gradually decreases as the corner connecting portions 25L and 25R taper as they approach the front portion 24. Further, the openings 25La and 25Ra extend to the rising portions of the corner connecting portions 25L and 25R. With such a configuration, the corner connecting portions 25L and 25R can be easily deformed over the entire corner connecting portions 25L and 25R while avoiding a significant decrease in strength.

The support member 30 of the housing 5 of the image display unit 10 is connected in parallel to the right front portion 24R in the eye width direction (X direction) (see FIG. 12 and the like). Thereby, the rigidity of the whole right front part 24R vicinity including the supporting member 30 increases by this. Accordingly, in order to prevent the rigidity of the left front portion 24L from being relatively low compared to the rigidity of the entire vicinity of the right front portion 24R, a reinforcing structure portion is formed in the left front portion 24L. Reference is now made to FIGS. 20 and 21A-C.
As shown in FIG. 20, the cross-sectional shape of the left front portion 24L is not a simple flat plate shape, but has a reinforcing rib 24La protruding in the Y direction. FIG. 21A schematically shows a cross section of the left front portion 24L shown in FIG. The reinforcing rib 24La is continuous in the longitudinal direction of the left front portion 24L. As can be seen from FIG. 6, the left front portion 24L is thicker than the left corner connecting portion 25R because the reinforcing rib 24La is formed on the left front portion 24L and the left corner connecting portion 25R. Because it is not. As shown in FIG. 21B, such a reinforcing structure has reinforcing ribs 24La and 24Lb on the upper and lower sides, and as shown in FIG. 21C, a central portion in the vertical direction (below the upper end of the left front portion 24L and above the lower end). It can also be carried out with a reinforcing rib 24Lc in the range.
In this way, while the rigidity of the right front portion is increased by the image display unit 10, the left and right uniformity of the rigidity of the front portion 24 is maintained by increasing the configuration of the left front portion with the reinforcing structure portion (reinforcing rib 24La). The distortion of the front part 24 at the time of mounting is suppressed.
Accordingly, the property that the right corner connecting portion 25R and the left corner connecting portion 25L are more easily elastically deformed than the front portion 24 can be made more remarkable.
When the structure (sliding mechanism) that supports the image display unit 10 so as to be slidable in the eye width direction with respect to the support member 30 is omitted, the housing 5 is placed on the right front portion 24R in the eye width direction (X direction). The right front portion (24R + 5) including the housing 5 is increased in rigidity. Therefore, even in this case, the reinforcing rib 24La is formed on the left front portion 24L so that the rigidity is aligned on the left and right.
The frame 20 is preferably made of metal stainless steel, titanium, aluminum or the like. Compared with resin, it can be made thinner and thinner, and an increase in size can be avoided.

A casing of the relay unit 60 is attached to the right temple portion 21R, and a casing 71 of the earphone unit 70 is attached to the left temple portion 21L. Since these are left-right symmetric configurations, the earphone unit 70 is attached so that the front portion 71a1 of the earphone unit 70 shown in FIG. 10 extends along the front portion 21Lb of the left temple portion 21L. The relay unit 60 is similarly attached to the right temple portion 21R.
Thus, by attaching the relay unit 60 and the earphone unit 70, the left and right temple portions 21L and 21R are less likely to bend. However, the deformability of opening the left and right temple portions 21L and 21R is sufficiently secured by the elastic deformation of the right corner connecting portion 25R and the left corner connecting portion 25L. On the other hand, deformation of the front portion 24 and the left and right temple portions 21L and 21R can be suppressed.
The left and right temple portions 21L and 21R may also be formed with reinforcing structure portions such as reinforcing ribs as in the case of the left front portion 24L within a range that does not impair appropriate flexibility. Thereby, the formability of the left and right temple portions 21L and 21R can be further improved.
Further, when the function of the relay unit 60 and the function of the earphone unit 70 are not necessary, only the casing excluding the internal electronic components and the like is attached to the temple portion 21L (21R), so that the mechanical properties and appearance are improved. Can be maintained. The empty casing may be specially designed in appearance. If a common housing is used, it can be provided at low cost.

(Effects and others)
As described above, according to the present embodiment, in the head mounted display 1, the right corner connecting portion 25R and the left corner connecting portion 25L are configured to be more easily elastically deformed than the front portion 24. It is possible to generate elastically recoverable deformation that increases the distance between the left and right temple portions 21L and 21R, mainly based on the elastic deformation amount of the left corner connecting portion 25L, thereby realizing fitability with a fit. Can do.
Further, the rigidity of the front portion 24 and the temple portions 21L and 21R including the unit to be attached can be increased, and distortion of the entire frame due to the load of the image display unit 10 at the time of mounting can be prevented, and the position of the image display unit 10 etc. The visibility of the screen formed on the image display member 2 can be maintained and stabilized.

The corner portions 25R and 25L are divided vertically by the openings 25Ra and 25La so that the distance between the temple portions 21L and 21R is easily bent and deformed around the Z axis. In addition, it is possible to make it difficult to bend and deform around the Y axis, and to achieve both rigidity and deformability necessary for good wearability. Note that a plurality of concave portions extending in the extending direction of the frame 20 may be provided in each corner connecting portion 25R, 25L. For example, two openings may be formed in each corner connecting portion 25R, 25L in parallel with the extending direction of the frame 20.
As described above, even in the monocular head mounted display 1 in which the weight balance tends to be uneven, the rigidity of the left and right front parts 24L and 24R is increased as evenly as possible, and the rigidity of the left and right temple parts 21L and 21R is increased. In addition, the left and right corner joints serve as the elastically deformable portion, so that it is possible to realize a wearability that combines a fixed form that suppresses inconvenient distortion of the frame 20 and a fit to the human head, and thus a head mounted display. The feeling of weight when 1 is attached can be relieved.

[Details of other parts]
The following is a supplementary explanation of the details of each part.
(Earphone unit)
As shown in FIGS. 10 and 11, the earphone unit 70 includes a second housing 71. That is, in the present embodiment, the other device built in the second casing 71 is a wireless earphone. The second housing 71 includes a substrate housing portion 71a and an inner ear portion 71b. The board housing portion 71a contains a communication circuit that receives a sound signal, a drive circuit that amplifies the received sound and drives a vibration portion configured in the inner ear portion 71b, a battery that serves as a power source for these circuits, and the like. Yes.
The substrate housing portion 71a includes a front portion 71a1 that is long and formed along the left temple portion 21L, and a rear portion 71a2 that continues to the rear end of the front portion 71a1 and protrudes downward to support the inner ear portion 71b. As shown in FIGS. 1 to 3 and the like, the front portion 71a1 is arranged cleanly along the left temple portion 21L, and the inner ear portion 71b is arranged in the ear hole of the wearer without interfering with the left temple portion 21L. is there.

The second casing 71 is detachably attached to the left temple portion 21L by an attachment member 72 made of an elastic material.
It is preferable to apply an elastomer as the elastic material constituting the attachment member 72.
The attachment member 72 is fixed to the inner side surface of the front portion 71a1 of the substrate housing portion 71a, and is formed long in the front-rear direction (Y direction) as with the front portion 71a1.
On the other hand, as shown in FIG. 4, a mounting opening 73 is formed in the front portion 21Lb applied to the side surface of the head of the wearer in front of the ear hook portion 21La of the left temple portion 21L. The attachment member 72 and the attachment opening 73 are for detachably attaching the earphone unit 70 to the left temple portion 21L, and are both formed long in the front-rear direction (Y direction). In this way, the mounting member 72 and the mounting opening 73 are formed long in the front-rear direction (Y direction) even in a configuration in which the mounting member 72 is one and the corresponding mounting opening 73 is one. This is to securely fix 70 to the left temple portion 21L without rattling. Further, by using one mounting member 72, the bonding area of the single mounting member 72 with the second housing 71 is increased, and the mounting member 72 is prevented from being peeled off from the second housing 71. can do. Further, as will be described later, the attachment member 72 abuts on the side surface of the head of the wearer and functions as an anti-slip and cushion material, so that the function is effectively exhibited.

As shown in FIG. 11, the attachment member 72 has a base 72a joined to the second casing 71 and a retaining end formed at the opposite end of the base 72a to the joint of the second casing 71. Part 72b.
The outer periphery of the base portion 72a corresponds to the inner periphery of the mounting opening 73 so as to substantially match. The retaining end 72 b is formed in a size that is slightly larger than the inner periphery of the mounting opening 73. That is, the retaining end 72b has a width larger than the inner width of the mounting opening 73 in both the Y direction and the Z direction.
The retaining end 72b is arranged in alignment with the mounting opening 73 and the earphone unit 70 is pressed against the left temple portion 21L, so that the retaining end 72b passes through the mounting opening 73 and is located inside the left temple portion 21L. The mounting structure in which the mounting member 72 is fitted into the mounting opening 73 is realized.
With this mounting structure, when the earphone unit 70 is mounted on the left temple portion 21L and the head mounted display 1 is mounted on the human head, the retaining end 72b of the mounting member 72 protrudes to the inside of the left temple portion 21L. Since the attachment member 72 made of an elastic material also functions as an anti-slip and cushion material, the head-mounted display 1 is displaced from the wearer's head or slides down. Can be prevented and wearability can be improved. In particular, in terms of wearability, the attachment member 72 can be flexibly applied to the human head, and a comfortable wearability can be obtained in a long-time wear.

By engaging the mounting member 72 made of an elastic material with the temple portion as described above, the earphone unit 70 can be easily attached and detached without a complicated configuration such as screwing.
In order to facilitate the diameter reduction deformation of the retaining end 72b at the time of attachment / detachment, as shown in FIG. 10, the mounting member 72 has a hole 72c that opens inside the retaining end 72b.
The retaining end 72b is inserted as shown in FIG. 11 so that the retaining end 72b is reduced in diameter and easily passes through the mounting opening 73 when worn, and so as to gently touch the head of the wearer. The outer peripheral corner is formed in a round shape.

Since the attachment member 72 is fixed to the second housing 5, the attachment member 72 is always attached to the earphone unit 70 during use including attachment / detachment. This prevents the attachment member 72 from being lost, and prevents the second housing 71 from becoming complicated because no attachment / detachment mechanism is formed between the second housing 71 and the attachment member 72.
In the present embodiment, the other device incorporated in the second casing 71 is a wireless earphone, but other examples include a camera and various sensors.

(Relay unit)
The relay unit 60 has substantially the same external shape as the board housing portion 71a of the earphone unit 70, and the same attachment / detachment mechanism as that for the left temple portion 21L of the earphone unit 70 is employed for mounting the relay unit 60 to the right temple portion 21R. ing. The attachment member 62 of the relay unit 60 is shown in FIG. The attachment member 62 also functions as an anti-slip and cushion material. Since the attachment members 62 and 72 contact the head of the wearer from both sides, the wearability is remarkably improved.

A plurality of types of sensors for detecting the state of the wearer's head are mounted on the relay circuit board 81 of the relay unit 60. In this embodiment, a gyro (angular velocity sensor) 82 and an electronic compass (geomagnetic sensor) 83 are provided as sensors for detecting the state of the wearer's head (see FIG. 19). By mounting a plurality of types of sensors for detecting the state of the head of the wearer, the state of the head of the wearer can be accurately detected. As other types, an acceleration sensor and an atmospheric pressure sensor (detecting an atmospheric pressure at the position of the head) may be mounted. Sensors are mainly installed to detect the position, direction or movement of the human head, but it is necessary to place brain waves, infrared rays, etc. in the vicinity of the human head for purposes such as detecting signals from the human head. By mounting a certain sensor on the relay circuit board, it can be arranged in the vicinity of the human head, and in this case, the load on the front side of the head is not increased.
The relay unit 60 has a built-in microphone 84 and is mounted on the relay circuit board 81 (see FIG. 19).
A wiring pattern (not shown) on the relay circuit board 81 constitutes a power and signal transmission path in the relay unit 60. The power transmission path on the relay circuit board 81 includes a transmission path for supplying power to the image display unit 10 described above. The signal transmission path on the relay circuit board 81 includes the captured image data of the front camera 4 of the image display unit 10 and the transmission path of the detection signal of the proximity sensor 6.

The end of the external connection cable 61 and the end of the intermediate cable 38 are connected to the relay circuit board 81 of the relay unit 60 by soldering or the like. Therefore, even if the relay unit 60 is removed from the right temple portion 21R using the elasticity of the mounting member 62, the external connection cable 61, the relay unit 60, the intermediate cable 38, the image display unit 10, and the frame 20 are connected. is there. In order to separate the relay unit 60 from the frame 20 and make it easy to attach / detach like the earphone unit 70, a connector may be provided at the end of the intermediate cable 38. This is advantageous for avoiding complication, enlargement, and weight increase of the mount display 1. Further, since the relay unit 60 is supported by the temple portion on the same side of the right temple portion 21R and the left temple portion 21L where the image display unit 10 is supported, it is possible to prevent the intermediate cable 38 from becoming long. Can do.

(Circuit block)
FIG. 19 is a block diagram of main circuits of the wearable computer. On the circuit board 90 installed in the image display unit 10, in addition to the camera 4 and the proximity sensor 6, a display panel driver 91 that is a drive circuit for driving the display element 14 and a light source 11 are driven. A light source driving circuit 92 that is a circuit, an illuminance sensor 93 that detects the brightness of the surrounding environment, and a power supply circuit 203 are provided. Based on the output from the illuminance sensor 93, the light source driving circuit 92 and the display panel driver 91 are controlled to adjust the luminance of the image displayed on the image display member 2, so that the image can be easily viewed by the user. . In addition to the gyro 82, the electronic compass 83, and the microphone 84, the relay circuit board 81 installed in the relay unit 60 is provided with an EEPROM 85 and a power supply circuit 202 for storing various information. The power supply circuit 202 supplies power to each part on the relay circuit board 81 and relays power supply to the subsequent image display unit 10. A circuit board 110 installed in the mobile computer 100 is provided with a CPU 101 that controls the entire system, a ROM 102 and a RAM 103 that store programs and various information, wireless communication devices 104 and 105, power on / off of the entire system, and various instructions. An operation unit 106 for performing operations, a storage device 107 such as a flash memory, an interface 108 for performing connection with an external device, and a power supply circuit 201 connected to a detachable battery 200 are provided. A signal transmission path for exchanging control signals and various kinds of information and a power transmission path for supplying power are configured to be connected to the external connection cable 61 via a connector 61a. A signal transmission path and a power transmission path between the circuit board 90 of the image display unit 10 and the relay circuit board 81 of the relay unit 60 are connected by an intermediate cable 38. The earphone unit 70 is provided with a wireless earphone device 120 and a sub-battery 121 as a power source for supplying power thereto. As shown in FIG. 19, in this example, since the user operates the wearable computer through a non-contact user interface using the proximity sensor 6 and the microphone 84, the mounting position of the head mounted display is less likely to be shifted by the operation. However, an operation unit may be provided on the frame 20, the image display unit 10, the relay unit 60, or the like of the head mounted display 1 so that the operation can be performed within a range in which an excessive mounting position shift does not occur. For example, a touch sensor can be provided so that an operation can be performed by touching or swiping, or a key can be arranged at a position where it can be pressed by another finger while being supported by any of a plurality of fingers.
As described above, the signal and power transmission paths between the unit (mobile computer 100) connected to the external connection cable 61 and the image display unit 10 are the external connection cable 61 and the relay circuit board in the relay unit 60. And the signal and power transmission path between the unit mobile computer 100) formed by the intermediate cable 38 and connected to the external connection cable 61) and the sensor in the relay unit 60 by the external connection cable 61 and the relay circuit board 81. It is formed.

(Rotating mechanism)
As shown in FIGS. 12 to 14, the right front portion 24 </ b> R has flange portions 24 </ b> Ra and 24 </ b> Rb extending in the radial direction from the installation portion of the rotation shaft member 33, and the radius from the installation portion of the rotation shaft member 34. The flange portions 24Rd and 24Re extending in the direction and the flange portions 24Rb and 24Re on both sides of the first housing 5 are connected to cross the first housing 5 in the eye width direction (X direction). And a transverse portion 24Rc.
On the other hand, the support member 30 extends in the eye width direction (X direction), and includes a bottom portion 30a on which the image display unit 10 is mounted, and arm portions 30b and 30c extending from both ends of the bottom portion 30a on the YZ plane.
On both sides of the image display unit 10, the rotation shaft member 33 (34) is provided in the hole provided in the flange portion 24Ra (24Rd), the coil spring 31 (32), and the arm portion 30b (30c). The image display unit 10 is inserted into the hole, and the distal end portion of the rotation shaft member 33 (34) is fitted into the fixing ring 35 (36), and the fixing ring 35 (36) is fixed to the distal end portion. A support member 30 that supports the frame is rotatably connected to the frame 20.

With the above structure, a pair of rotating shaft members 33 and 34 are disposed on both side surfaces of the first housing 5 in the eye width direction (X direction).
The rotation shaft members 33 and 34 are opposed to both side surfaces of the first housing 5 in the eye width direction (X direction). That is, the central axis of rotation is at a position passing through the first housing 5. Although the center axis of the rotation is at a position passing through the first housing 5, the first housing 5 is avoided by the flange portion 24Rb, the flange portion 24Re, and the transverse portion 24Rc, and the one rotating shaft member 33 side And the other rotating shaft member 34 side are connected. Since the center axis of rotation is at a position passing through the first casing 5, the movement space of the image display unit 10 (particularly the first casing 5) accompanying the rotation can be made compact, and it is easy to use and compact. Can be held.
Further, as shown in FIG. 13, the central axes of the rotation shaft members 33 and 34 are arranged on the wearer side from the plane 6 where the image light emitting surface 17b of the image display member 2 exists. Thereby, since the central axis of the rotation shaft members 33 and 34 is located at a position close to the wearer's pupil side, the tilt angle with respect to the wearer's line of sight for the amount of movement of the image display member 2 in the tilt angle adjustment. Changes gradually, and the fine adjustment of the tilt angle is facilitated.

Further, the image display unit 10 side and the frame 20 side in the rotation of the image display unit 10 are biased to each other in the axial direction (X direction) of the rotation shaft members 33 and 34 by the coil springs 31 and 32 having the above structure. By doing so, a frictional resistance is generated in the rotation, and the angle of the rotation can be maintained. That is, the image display unit 10 is supported by the frame 20 so as to be held at an arbitrary angular position.
In the present embodiment, coil springs 31 and 32 that are urging members are provided on both sides in the eye width direction (X direction) of the image display unit 10, and the image display unit 10 is mounted on both sides by the coil springs 31 and 32 provided on both sides. The frictional resistance is generated by pressing the support member 30 directly (support member 30 directly).
More specifically, one end of the rotation shaft member 33 (34) is connected to the flange portion 24Ra (24Rb) of the frame 20, and the other end of the rotation shaft member 33 (34) is the arm portion 30b ( 30c), and the coil spring 31 (32) presses the side surface of the support member 30 in the eye width direction (X direction), that is, the surface of the arm portion 30b (30c), thereby generating the frictional resistance.
As described above, the tilt angle of the image display member can be finely adjusted, and the adjusted angle can be stably maintained. Further, by performing the tilt adjustment at a position close to the eyes, it is possible to obtain the same effect as when the position of the display screen of the image display member 2 is substantially adjusted in the vertical direction. Further, the position in the front-rear direction (depth direction) can also be adjusted to some extent. Therefore, fine adjustment up and down and front and rear can be performed by providing the tilt adjustment mechanism. Since the camera 4 and the proximity sensor 6 are simultaneously rotated by adjusting the angle of the image display member 2, there is no positional deviation between the camera 4 and the proximity sensor 6 and the image display member 2 due to the rotation operation.

(Outer cover)
As shown in FIG. 15, the outer cover 37 is fixed to the support member 30 and rotates together with the image display unit 10 and the support member 30. The outer cover 37 covers the support member 30 and the first housing 5 and exposes the image display member 2. Since the rotating part is covered with the outer cover 37, it is possible to prevent foreign matter from entering and obstructing the tilt angle adjusting function.

(Intermediate cable)
The intermediate cable 38 is for connecting the image display unit 10 to the relay unit 60.
As shown in FIGS. 16A and 16B, the intermediate cable 38 extends from the first housing 5 and passes through a hole 37a provided in the outer cover 37 so as to be movable with respect to the hole 37a. In the present embodiment, the bush 39 fitted in the hole 37 a fills the gap between the intermediate cable 38 and the hole 37 a to ensure the dustproof property of the outer cover 37, and the intermediate cable 38 is against the bush 39. Their materials and dimensions are selected to slide.

(Slide mechanism)
As shown in FIGS. 14, 16A, and 16B, the support member 30 supports the image display unit 10 so as to be movable in the eye width direction (X direction) via the slide mechanism.
The slide mechanism has a locking mechanism that holds the slide operation at a predetermined pitch. The slide mechanism is inserted into the guide holes 30a1 and 30a1 provided in the bottom 30a of the support member 30, and the guide holes 30a1 and 30a1, and the tip is first. A guide pin 5a, 5a fixed to one housing 5 constitutes a slide guide mechanism, and is provided on a surface facing the bottom portion 30a of the first housing 5 with a holding groove band 5b and a holding groove band 5b. The locking mechanism is configured by a leaf spring 30a2 having a protrusion 30a3 that fits into the formed groove.
The guide holes 30a1 and 30a1 extend long in the X direction, a gap is provided between the first housing 5 and the arm portions 30b and 30c of the support member 30, and the guide pins 5a and 5a are guided holes 30a1 and 30a1. The image display unit 10 can move in the eye width direction (X direction) with respect to the support member 30, the outer cover 37, and the frame 20 as shown by an arrow A in FIG. 16B.
As shown in FIGS. 16A and 16B, the holding groove band 5b is formed by continuously forming a plurality of grooves cut in the Y direction at a predetermined pitch in the X direction, and the leaf spring 30a2 holds the protrusion 30a3. An elastic force is applied so as to press the groove band 5b. Thereby, the protrusion 30a3 fits into each groove of the holding groove band 5b, and the sliding operation of the image display unit 10 can be held at a predetermined pitch.

As described above, even if the image display unit 10 slides with respect to the outer cover 37, and even when the outer cover 37 moves with respect to the frame 20 by adjusting the tilt angle, the intermediate cable 38 is connected to the outer cover 37. Therefore, these operations can be performed smoothly without applying a mechanical load to the intermediate cable 38. *

(Dustproof / waterproof structure of image display unit)
Further, the dustproof and waterproof properties in the first housing 5 are ensured by the seal member 40 shown in FIG.
Since the first housing 5 is separated into half bodies, the seal member 40 is arranged over the entire circumference of the separation surface of the first housing 5 and further around the base end 2 a of the image display member 2. ing. That is, the seal member 40 has a structure in which an annular part into which the image display member 2 is inserted is connected to a part sandwiched between two halves of the first housing 5. The separation surface of the first housing 5 and the space between the first housing 5 and the base end portion 2 a of the image display member 2 are sealed.
The bush 41 is fitted in the intermediate cable lead-out hole of the first housing 5 and seals between the intermediate cable 38 and the first housing 5. Since the intermediate cable 38 does not need to be movable with respect to the bush 41, the material and dimensions thereof are selected so that the bush 41 firmly clamps the intermediate cable 38.
The cap 42 attached to the opposite side of the bush 41 is a lid member that seals the cable lead hole when the image display unit 10 is attached to the left. As a result, the image display unit 10 can be adapted to both right and left mounting. The cap 42 corresponds to a cap in which the hole of the bush 41 is filled.
As described above, the dustproof and waterproof properties in the first housing 5 are ensured, and a liquid such as water or a gas such as water vapor is applied to the image generating unit 3 and the front photographing camera 4 in the first housing 5. Intrusion can be prevented.

(Display function of image display unit)
FIG. 18 is a cross-sectional view illustrating a schematic configuration of the image display unit 10.
The image display unit 10 includes a light source 11, a unidirectional diffuser 12, a condenser lens 13, a display element 14, and an image display member 2. The image display member 2 constitutes a see-through display member.

The light source 11 illuminates the display element 14. For example, the light source 11 is 462 ± 12 nm (B light), 525 ± 17 nm (G light), 635 ± 11 nm (R It is composed of RGB-integrated LEDs that emit light in three wavelength bands. As described above, the light source 11 emits light having a predetermined wavelength width, whereby the image light obtained by illuminating the display element 14 can have a predetermined wavelength width. When the lens is diffracted, the image of the wearer can be observed over the entire observation angle of view at the position of the pupil B. Further, the peak wavelength for each color of the light source 11 is set in the vicinity of the peak wavelength of the diffraction efficiency of the hologram optical element 19, so that the light utilization efficiency is improved.
Further, since the light source 11 is composed of LEDs that emit RGB light, the light source 11 can be realized at low cost, and a color image is displayed on the display element 14 when the display element 14 is illuminated. And the color image can be provided to the wearer. In addition, since each of the RGB LED elements has a narrow emission wavelength width, the use of a plurality of such LED elements enables high color reproducibility and bright image display.

The display element 14 modulates the light emitted from the light source 11 according to image data and displays an image, and is composed of a transmissive liquid crystal display element having pixels in a matrix in which light is transmitted. Has been. The display element 14 may be a reflective type.

The eyepiece prism 17 totally reflects the image light from the display element 14 incident through the base end surface 17 a by the opposed parallel inner side surface 17 b and outer side surface 17 c, and the wearer's pupil through the hologram optical element 19. On the other hand, external light is transmitted and guided to the wearer's pupil, and is made of, for example, an acrylic resin together with the deflecting prism 18.
The eyepiece prism 17 and the deflection prism 18 are joined by an adhesive with the hologram optical element 19 sandwiched between inclined surfaces 17d and 18a inclined with respect to the inner surface 17b and the outer surface 17c.

The deflecting prism 18 is joined to the eyepiece prism 17 so as to be integrated with the eyepiece prism 17 into a substantially parallel plate. By joining the deflection prism 18 to the eyepiece prism 17, it is possible to prevent distortion of the external image observed by the wearer through the image display member 2.
That is, for example, when the deflecting prism 18 is not joined to the eyepiece prism 17, the external light is refracted when passing through the inclined surface 17 d of the eyepiece prism 17, so that the external image observed through the eyepiece prism 17 is distorted. . However, when the deflecting prism 18 having the inclined surface 18a complementary to the eyepiece prism 17 is joined to form an integral substantially parallel flat plate, external light passes through the inclined surfaces 17d and 18a (the hologram optical element 19). The refraction at that time can be canceled by the deflecting prism 18. As a result, it is possible to prevent distortion in the external image observed through the see-through.
If a corrective spectacle lens is mounted between the image display member 2 and the wearer's pupil, it is possible for a wearer who normally uses spectacles to observe an image without any problem.

The hologram optical element 19 diffracts and reflects the image light (light having a wavelength corresponding to the three primary colors) emitted from the display element 14 and guides it to the pupil B. The image displayed on the display element 14 is enlarged and the wearer's It is a volume phase type reflection hologram guided as a virtual image to the pupil. The hologram optical element 19 has, for example, three wavelength ranges of 465 ± 5 nm (B light), 521 ± 5 nm (G light), and 634 ± 5 nm (R light) with a peak wavelength of diffraction efficiency and a wavelength width of half the diffraction efficiency. The light is diffracted (reflected). Here, the peak wavelength of diffraction efficiency is the wavelength at which the diffraction efficiency reaches a peak, and the wavelength width at half maximum of the diffraction efficiency is the wavelength width at which the diffraction efficiency is at half the peak of the diffraction efficiency. It is.
The reflection-type hologram optical element 19 has high wavelength selectivity, and only diffracts and reflects light having a wavelength in the wavelength range (near the exposure wavelength). The hologram optical element 19 is transmitted, and a high external light transmittance can be realized.

The light emitted from the light source 11 is diffused by the unidirectional diffusion plate 12, condensed by the condenser lens 13, and enters the display element 14. The light incident on the display element 14 is modulated for each pixel based on the image data, and is emitted as image light. That is, a color image is displayed on the display element 14.
The image light from the display element 14 enters the eyepiece prism 17 from its proximal end surface 17a, is totally reflected a plurality of times by the inner side surface 17b and the outer side surface 17c, and enters the hologram optical element 19. The light incident on the hologram optical element 19 is reflected there, passes through the inner side surface 17b, and reaches the pupil B. At the position of the pupil B, the wearer can observe an enlarged virtual image of the image displayed on the display element 14.
On the other hand, the eyepiece prism 17, the deflecting prism 18, and the hologram optical element 19 transmit almost all of the outside light, so that the wearer can observe the outside world image through them. Therefore, the virtual image of the image displayed on the display element 14 is observed while overlapping a part of the external image.

As described above, the wearer can simultaneously observe the image provided from the display element 14 and the external image via the hologram optical element 19.
By the way, the hologram optical element 19 is a hologram having wavelength selectivity, and can see the outside world without reducing the amount of light. However, a half mirror may be installed instead of the hologram. However, since the amount of light of the external image is less than half, a bright external image like a hologram cannot be seen.
In this embodiment, the surface to which the hologram optical element 19 is attached is not limited to a flat surface, and the hologram optical element 19 may be attached to an aspherical shape.

The present invention can be used for displaying an image to a wearer.

DESCRIPTION OF SYMBOLS 1 Head mounted display 2 Image display member 3 Image generation part 4 Front imaging | photography camera 5 1st housing | casing 10 Image display unit 20 Frame 21L Left temple part 21R Right temple part 22L, 22R Nose pad 24 Front part 24L Left front part 24R Right front portion 25L Left corner connecting portion 25La Opening 24La-c Reinforcing rib 25R Right corner connecting portion 25Ra Opening 37 Outer cover 38 Intermediate cable 60 Relay unit 61 External connecting cable 61a Connector 62 Mounting member 70 Earphone unit 71 Second housing 72 Mounting member 73 Mounting opening 100 Mobile computer

Claims (6)

An image display member disposed in front of the wearer's right eye or in front of the left eye and an image generation unit for generating an image displayed on the image display member are fixed to the housing, and the image display member is mounted on the housing. An image display unit in which the base end and the image generation unit are accommodated;
A right front part and a left front part, a right temple part, a left temple part, and the right temple part and the right front part, which are attached to the wearer's head and arranged on the front side of the wearer's head. A right corner connecting portion, a left corner connecting portion that connects the left temple portion and the left front portion, and a frame that supports the image display unit on the right front portion or the left front portion,
The right front part and the right corner connecting part are integral, the right corner connecting part is provided with a right concave part extending in the extending direction of the frame, and the left front part and the left corner connecting part are A head-mounted display which is a single body and is provided with a left-side concave portion extending in an extending direction of the frame at the left corner connecting portion. The right front part is arranged at a position higher than the right temple part with respect to the wearer's head, and the right corner connecting part constitutes a connecting part formed by rising from the right temple part to the right front part. The left front portion is disposed at a position higher than the left temple portion with respect to the wearer's head, and the left corner connecting portion constitutes a connecting portion formed by rising from the left temple portion to the left front portion. The head mounted display according to claim 1. The frame is a hingeless frame or a foldable frame that is hinged so that the right temple portion is restricted to the right corner connecting portion and the left temple portion is open and restricted to a certain angle to the left corner connecting portion. The head mounted display according to claim 1 or 2, wherein The said right side recessed part is provided by the opening formed in the said right corner connection part, and the said left side recessed part is provided by the opening formed in the said left corner connection part. The head mounted display as described in. The housing of the image display unit or a support member thereof is connected in parallel to the eye width direction to one of the right front part and the left front part, and a reinforcing structure part is formed on the other. The head mounted display as described in any one of Claims 1-4. The head according to any one of claims 1 to 5, wherein a housing capable of storing an electronic component is attached to the right temple portion, and a housing capable of storing an electronic component is attached to the left temple portion. Mount display.

Images