JP2001330794A - Head mounting type video display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a head mounting type video display device which is simple in constitution, may be made inexpensive and is suitable for long-time use. SOLUTION: This head mounting type video display device has a video display means 37, optical systems 14 and 15 for projecting the videos projected by this video display means 37 and/or the ambient outside world to at least one eye part 102 of an observer, an armoring block 1 which contains the video display means 37 and the optical systems 14 and 15 and a supporting block 2 which is supported at the head 101 of the observer and holes the armoring block 1 at an observation position. The supporting block 2 has an elastically deformable head band 5 which extends to an arcuate form in the circumferential direction of the head, right and left supporting members 6L and 6R which are respectively coupled to both ends of the head band 5 and are disposed abuttably on the head 101 and right and left regulating means 7L and 7R which regulate the positions of the right and left supporting members 6L and 6R relative to the head 101.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a head-mounted image display device having an optical system for projecting an image projected by an image display means onto at least one eyeball retina of an observer.

[0002]

2. Description of the Related Art Various binocular head mounted image display devices such as a so-called head mounted display (hereinafter referred to as HMD) have been put into practical use as a small display device used for image display. Various head-mounted image display devices for a single eye have been proposed, which enable an output image such as data from a personal computer (personal computer) to be observed with one eye. This monocular head mounted image display device is used for operations such as article management and mechanical maintenance and inspection, and observes the personal computer screen of the display device with one eye and observes the surrounding environment state with the other eye. You can do it.

[0003] On the other hand, a head-mounted image display device is worn over the head or hooked on the head, so that it is suitable for all observers regardless of the size of the head. It is necessary to provide an adjustment mechanism.

The adjusting mechanism is disclosed in, for example,
Japanese Patent Application Laid-Open No. 05298 discloses a structure in which a clamping force adjusting band is provided at both ends of an arc-shaped holding portion for holding a video display device main body. Also disclosed is one in which hook-and-loop fasteners are provided at the free ends of the left and right headbands.

In Japanese Patent Application Laid-Open No. 7-104210, a pressing support member provided with pads for contacting the head is provided at both ends of an arc-shaped holding portion for holding the apparatus main body in a displaceable manner. Japanese Patent Application Laid-Open No. 7-333547 discloses that a pad is brought into contact with a head by displacing a pressing support member by adjusting means. A movable frame provided with a pad to be brought into contact with the head is rotatably attached to the part, and the movable frame is rotated by an adjusting means so that the pad is brought into contact with the head. .

[0006]

However, in the above-mentioned apparatus using the tightening force adjusting band or the hook-and-loop fastener, the adjustment is easy, but the tightening of the observer's head is required. Not very suitable for mounting. Further, in the case of displacing the pressing support member provided with the pad or rotating the movable frame provided with the pad, the configuration becomes complicated and there is a concern that the cost may be increased.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a head-mounted image display device which has a simple structure, can be manufactured at low cost, and is suitable for long-time use. .

[0008]

According to a first aspect of the present invention which achieves the above object, an image display means and an image projected by the image display means and / or a surrounding external world are displayed on at least one eye of an observer. An optical system for projecting the image onto the section, an exterior block incorporating the image display means and the optical system, and a support block supported by the head of an observer and holding the exterior block at an observation position. In the head-mounted image display device, the support block is elastically deformable and extends in an arc shape in the head-surrounding direction. And left and right support members provided on the head, and left and right adjustment means for adjusting the positions of the left and right support members with respect to the head.

According to a second aspect of the present invention, in the head-mounted image display device according to the first aspect, each of the left and right adjusting means includes a position in a head surrounding direction and a head width direction of the corresponding support member. And a head width adjustment mechanism for adjusting the position of the head.

According to a third aspect of the present invention, in the head-mounted image display device according to the second aspect, each of the head circumference adjusting mechanisms slides in a head circumference direction with respect to the headband. And a second slide member that slides in a head-surrounding direction with respect to the first slide member.
The support member is attached to the slide member via the head width adjustment mechanism.

According to a fourth aspect of the present invention, in the head-mounted image display device according to the third aspect, the exterior block is for a single eye, and the first slide member or the first slide member of one of the left and right head circumference adjustment mechanisms. It is characterized by being supported by two slide members.

According to a fifth aspect of the present invention, in the head-mounted image display device according to the third aspect, the headband has a radius of curvature at a central portion of 60 mm to 70 mm, and a maximum adjustment by each head circumference adjusting mechanism. The amount is 40 mm to 72 mm, and the maximum adjustment amount by each head width adjustment mechanism is 8 mm to 20 mm.
mm.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a head mounted video display according to the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view diagrammatically showing a state where the monocular HMD is mounted on the head, FIG. 2 is a cross-sectional view of the monocular HMD, and FIG. 3 is a state where the monocular HMD is mounted on the head. FIG. 4 is a diagram showing a rotating state of the exterior block in a horizontal plane in the state.
FIG. 5 is a view showing a rotation state of the exterior block in a vertical plane, FIG. 5 is a view showing a specific configuration of the support block, and FIG. 6 is a view showing a positional relationship between the spectacles and the face pad under spectacle use. 7 is a view showing a state in which the monocular HMD is attached to an observer with a large head and a small head width, and FIG.
FIG. 9 is a view showing a state where the apparatus is worn on an observer with a large head width, and FIG.
0 is a diagram showing a state of wearing to an observer with a small head and a large head width, and FIG. 11 is a diagram showing a state of wearing to an observer with a small head and a small head width.

As shown in FIG. 1, the monocular HMD of this embodiment includes an exterior block 1 and a support block 2 for holding the exterior block 1 at an observation position close to the head 101 of the observer. have.

The exterior block 1 mainly includes a viewer section 3 containing a single image display means and an optical system, and an arm section 4 containing an input circuit, a main control circuit, a changeover switch, etc., and containing an earphone. And a video signal and an audio signal from a personal computer (not shown) are taken in by the input circuit via an HMD controller (not shown) so that the video and audio are reproduced. I have.

The support block 2 has an elastically deformable head band 5 extending in an arc shape from the back of the head to both sides of the head band when the head block 101 is mounted on the head 101. The left and right support members 6L and 6 which are respectively connected and provided so as to be able to contact the right and left temple vicinity portions 106.
R and right and left adjusting members 7L and 7R for adjusting the positions of the left and right support members 6L and 6R with respect to the head 101.

The left adjusting means 7L comprises a head circumference adjusting mechanism 8L for adjusting the position of the corresponding support member 6L in the head circumference direction,
A head width adjusting mechanism 9L for adjusting the position in the head width direction. The head circumference adjusting mechanism 8L includes, at the left end of the headband 5, a first slide member 11L that slides in the head circumference direction with respect to the headband 5, and a first slide member 11L.
The second slide member 1 that slides in the head surrounding direction with respect to L
2L, and a support member 6L is attached to the second slide member 12L via a head width adjusting mechanism 9L.

Similarly, the right adjustment means 7R has a head circumference adjustment mechanism 8R for adjusting the position of the corresponding support member 6R in the head circumference direction and a head width adjustment mechanism 9R for adjusting the position in the head width direction. are doing. The head circumference adjusting mechanism 8R includes, at the right end of the headband 5, a first slide member 11R that slides in the head circumference direction with respect to the headband 5, and a second slide member that slides in the head circumference direction with respect to the first slide member 11R. And a second slide member 12R.
A support member 6R is attached to 2R via a head width adjusting mechanism 9R.

In this embodiment, the exterior block 1 is rotatably supported on the right side second slide member 12R via the joint portion 13. The exterior block 1 may be supported by the first slide member 11R via a joint 13 so as to be rotatable at a point.

Next, a specific structure of the exterior block 1 will be described with reference to FIGS. In the viewer section 3 and the arm section 4, a composite circuit board section 21 for processing a video signal and an audio signal is built in both main body sections. The composite circuit board unit 21 includes a rigid circuit board 2
2, a main control circuit board 24 as a rigid board, a drive circuit board 26 as a rigid board, an LCD board 27 as a rigid board, and a flexible printed board for connecting the input circuit board 22 and the main control circuit board 24. (Less than,
FPC) 23, main control circuit board 24, LC
F connecting the D drive circuit board 26 and the LCD circuit board 27
PC25.

On the main control circuit board 24, a CPU 33 for controlling the entire HMD and switches 34, 35 for changing the screen display state are mounted. On the input circuit board 22, a connector 31 for a serial signal cable and an earphone connection cord and an input are provided. The circuit IC 32 is mounted.

An LCD drive circuit IC 36 is mounted on the drive circuit board 26, and a field sequential type Si chip liquid crystal (hereinafter simply referred to as LCD) 37 and a microphone 38, which are image display means, are mounted on the LCD board 27. (Not shown) are mounted.

The viewer section 3 comprises a viewer body and a prism section. As shown in FIGS. 2 and 3, the viewer main body is connected to the arm 4 by a hinge pin 41.
a viewer body 3a rotatably supported in the horizontal direction θ1 by a and 41b, and a drive circuit board which is a member built in the viewer body 3a and on which the LCD drive circuit IC 36 of the composite circuit board section 21 is mounted. 26 and LCD3
7 comprises an LCD board 27 on which the IC chip 7 is mounted and a microphone 38.

The viewer main body 3a is made of metal which is less likely to change due to aging and temperature and is effective in preventing light leakage. Further, the LCD drive circuit IC 36 is arranged close to the LCD 37 in the viewer main body 3a to minimize the generation of radiation noise.

The prism section includes a sheet metal prism holding member 16 fixed to the viewer main body 3a, a free-shaped prism (free-form surface prism) 14 as an optical system fixed and supported by the holding member 16, and Prism 1
4, a see-through prism 15 as an optical system adhered and fixed on the see-through surface to the eyepiece 4, an eyepiece side acrylic plate 17 which is a water-repellent treated transparent transparent plate fixed and supported by the holding bracket 16 or the viewer main body 3a; Object-side acrylic plate 18, holding bracket 16 or viewer body 3
and a protective cover 19 which is inserted outside of FIG.

The protective cover 19 is made of an elastically deformable synthetic rubber material (elastomer), and has an inner opening 19a, an outer opening 19b, and a nose pad 19c. Since this protective cover 19 is elastically deformed and attached to the holding bracket 16 or the viewer main body 3a, external light other than see-through is shielded, and at the same time, waterproofing and dustproofing are performed inside.

Note that the protective cover 19 is detachable, and a protective cover without the outer opening 19b is separately prepared, and can be used without observing the see-through screen by replacing it. I have.

The viewer section 3 includes hinge pins 41a, 41
Although it can be rotated in the θ1 direction (see FIG. 3) about b, when the viewer unit 3 is rotated toward the observer, the prism unit comes into contact with the right eye unit 102 of the observer. Since the nose pad 19c of the protective cover 19 comes into contact with the nose 107 of the observer earlier, the right eye 102 is protected.
At the same time, the display image position does not approach the myopia side for a predetermined distance or more.

The arm unit 4 includes hinge pins 41a and 41b for supporting the viewer unit 3 so as to be rotatable in the θ1 direction, an arm body 4a having a curvature along the outer periphery of the head, and a built-in arm body 4a. HM
A main control circuit board 24 on which a CPU 33 for controlling the entire D and display screen changeover switches 34 and 35 are mounted
, An input circuit board 22 on which a connector 31 and an input circuit IC 32 are mounted, operation buttons 44 and 45 for operating changeover switches 34 and 35, a joint 13 with the support block 2, and the like.

Hinge pin 4 on the viewer 3 side of arm 4
As shown in FIG. 4, a constricted portion 4d in the width direction (vertical direction) is formed around 1a and 41b. The restriction of the visual field to the outside world on the observation eye side by the arm portion 4 can be reduced by the constricted portion 4d.

A flexible dust-proof cover 42, which is made of elastically deformable rubber and also serves as a waterproof, is attached to the connection between the arm 4 and the viewer 3 around the hinge pins 41a, 41b.

On the rear end side (the end opposite to the viewer side) of the arm main body 4a, the upper position of the ear 104 when the main cable 47 and the earphone cord 48 covered by the cord bush are mounted. It is arranged in a state of extending rearward from.

The main cable 47 is a serial communication signal cable from an HMD controller (not shown). The main cable 47 enables high-speed communication, reduces the number of cables, and improves the flexibility of the HMD. I do not get in the way when wearing my head. Although the communication signal from the personal computer to the HMD controller is a parallel signal, the signal is converted into a serial communication signal by the HMD controller and transmitted to the monocular HMD by the main cable 47.

The earphone 49 attached to the tip of the earphone cord 48 is an inner-type monaural earphone for facilitating discrimination from external sounds, and has a concave earphone mounting portion 4b on the inner rear surface of the arm body 4a.
It can be attached and stored. In the housed state, the earphone 49 is attached with the sound opening facing the head side, and can be heard even in that state.

The joint part 13 includes a joint body 51
And a ball support 52 divided into two parts. The joint body 51 includes a portion that is slidably fitted into the slide groove 4c of the arm body 4a and a holding portion 5 that holds the ball support 52.
1a. When the arm 4 slides in the direction D1, the arm 4 moves along the slide groove 4c while escaping the holding portion 51a of the joint body 51 by the escape portion 4d.

The sliding direction of the arm 4 is as follows.
Although it is assumed that the head 101 slides on a large arc centered on the center P0 of the head 101, this movement may be a linear slide movement in the front-back direction of the head.

The above-mentioned two-piece ball support 52 holds the ball 53 fixed to the second slide member 12R on the right side in a rotatable manner with an appropriate friction holding force, and is fixed to the joint body 51. Supported.

The operation buttons 44 and 45 for pressing the changeover switches 34 and 35 are provided along the upper and lower sides of the outer surface of the arm body 4a. The arrangement position is
Even near the position of the ball support 52 but closer to the viewer unit 3 side, even when the arm unit 4 slides rearmost, it is extremely inclined with respect to the straight line connecting the head center P0 and the ball 53. It does not move rearward.

The external shapes of the operation buttons 44 and 45 are as follows.
Each has a different shape. For example, operation button 4
4 has a projection 44a at its center, and the operation button 45 has a recess 45a at its center. Thus, the operation button 44,
45, the two operation buttons 4
When the screen is switched by operating the changeover switches 34 and 35 at 4 and 45, it is ensured which operation button is pressed to prevent an operation error.

The above-described screen switching is performed by sequentially operating the operation button 45 and repeatedly pressing the changeover switch 35 while operating the operation button 44 and pressing the changeover switch 34, thereby sequentially switching the screen display state. Will do.

The types of the screen display states that can be switched include the reverse display (18) of the screen displayed on the LCD 37.
(0 degree rotation display), brightness switching of the display screen, reset of the screen switching state, image display position on the screen (switching for fine adjustment to a position easy to observe with the eye), and the like. The display is switched step by step by repeatedly pressing the switch 35.

The circuit board 21 built in between the viewer section 3 and the arm section 4 includes an FPC in the viewer section 3.
The rigid LCD board 27 and the LCD drive circuit board 26 are arranged in an appropriate posture perpendicular to each other by bending the LCD panel 25.
In particular, in the arm section 4, the input circuit board 22 of the rigid board and the main control circuit board 24 are arranged in a posture along the curvature of the outer shape of the arm section 4 by bending the FPC 23 and the FPC 25.

Here, the rotation and sliding operation of the exterior block 1 will be described. As described above, the arm 4 supports the viewer 3 so as to be rotatable by the hinge pins 41a and 41b. It is possible to move between positions Pa and Pb in the left and right θ1 directions (see FIG. 3).

The arm part 4 is provided with the second slide member 1.
Since the point is supported by the joint portion 13 with the 2R ball 53, the ball rotates in the left and right θ2 directions (see FIG. 3) and the vertical θ3 direction (see FIG. 4), and moves the viewer portion 3 from the position Pa to Pc. , And from the position Pg to the position Ph.

Further, since the arm 4 is slidably supported in the direction D1 (see FIG. 3) via the joint main body 51 with respect to the second slide member 12R, the viewer 3 is moved from the position Pd to Pe. Can be moved.

Next, a specific configuration of the support block 2 will be described with reference to FIG. The headband 5 is formed of an elastically deformable thin plate having an arc shape, an elliptical shape, or a free-curve shape close to an arc shape that matches the observer's head 101.

The left and right first slide members 11L and 11R have the same configuration, and are provided at both ends of the headband 5 so as to be slidable in the head-surrounding direction. Guide grooves into which the headbands 5 are engaged and inserted into the first slide members 11L and 11R, as shown in the sectional view along the line AA in FIG. 61 are formed. Further, in order to adjust the sliding position of the first slide members 11L and 11R with respect to the headband 5, slide springs 62 are provided at both ends of the headband 5 so as to protrude outward, respectively, and are provided inside the first slide members 11L and 11R. A click groove 63 is formed in a sawtooth waveform along the head surrounding direction so as to engage with the corresponding slide spring 62, and each of the first slide members is formed by engagement of the slide spring 62 and the click groove 63. 11L and 11R are positioned at desired slide positions.

The second slide members 12L and 12R have the same structure, and the corresponding first slide members 11L and 12R
11R is provided slidably in the head surrounding direction. Second slide member 1 for first slide members 11L and 11R
A guide groove 64 is formed on the inner peripheral side of the outer wall of the first slide members 11L and 11R along the head-surrounding direction in order to surely slide the 2L and 12R.
Second slide members 12L, 12R for inserting L, 11R
Is formed with a convex portion 65 that engages with the corresponding guide groove 64. Further, in order to adjust the sliding position of the second slide members 12L, 12R with respect to the first slide members 11L, 11R, the second slide members 12L, 12R are directed toward the outer peripheral side of the outer wall of the corresponding first slide members 11L, 11R. A slide spring 66 is provided so as to protrude, and a click groove 67 is formed on the outer peripheral side of the outer wall of the first slide members 11L and 11R in a sawtooth wave shape along the head surrounding direction so as to engage with the corresponding slide spring 66. The engagement between the slide spring 66 and the click groove 67 positions the second slide members 12L and 12R at desired slide positions.

Further, the second slide members 12L, 12R
On the outer surface of the joint body 51 of the joint portion 13
Is formed, and the second slide member 12
On the other hand, in this embodiment, the screw portion 53a of the ball 53 is fixed to the concave portion 68 of the right second slide member 12R by the nut 53b, and the joint portion of the arm portion 4 is fixed to the ball 53 as described above. Reference numeral 13 denotes a point rotatably supported with a predetermined friction holding force.

The left and right support members 6L, 6R and the head width adjusting mechanisms 9L, 9R also have the same configuration.
Here, the configurations of the right support member 6R and the head width adjusting mechanism 9R will be described. FIG. 5 is a sectional view taken along line AA and FIG.
As shown in the cross-sectional view taken along the line B, the support member 6 </ b> R is slidable in the head width direction with respect to the second slide member 12 </ b> R.
It has a slide member 71R. Third slide member 7
1R includes an upper slider 72a and a lower slider 72b located above and below the second slide member 12R, a pad seat 73 connecting the sliders 72a and 72b on the head side,
It has face pads 74a and 74b made of foamed rubber (sponge) which are separately provided on the pad seat 73 vertically.

As shown in FIG. 3, the face pads 74a and 74b come into contact with the temple near portion 106 at a distance X0 ahead of a line passing through the ear portion 104 and the center P0 of the head in the mounted state, as shown in FIG. When the observer wears the spectacles 110, the frame 111 of the spectacles 110 is located between the face pads 74a and 74b so that the monocular HMD can be worn without any problem even when the spectacles 110 are used. It has become. In FIG. 6, the exterior block 1 is not shown.

To form the head width adjusting mechanism 9R, guide holes 75a and 75b are formed in the upper slider 72a and the lower slider 72b along the sliding direction, respectively, and the guide holes 75a and 75b are formed in the second slide member 12R. Guides 76a and 76b respectively engaging with 75b
The third slide member 71R can be reliably slid in the head width direction with respect to the second slide member 12R by engagement of the guide holes 75a, 75b with the corresponding guides 76a, 76b. .

In order to adjust the slide position of the third slide member 71R with respect to the second slide member 12R,
A plurality of positioning holes, in this embodiment, three positioning holes 77a, 77b, and 77c are formed along the sliding direction on the upper slider 72a and the lower slider 72b so as to face each other. Are provided with lock members 78, 79 which can be selectively engaged with upper and lower opposing positioning holes 77a, 77b or 77c.

The lock member 78 is connected to the second slide member 12.
An engagement protrusion 78a that selectively projects from the upper surface of the R and engages with the positioning hole 77a, 77b or 77c of the upper slider 72a, and a third protrusion formed integrally with the engagement protrusion 78a and not having the upper slider 72a. It is formed in a U-shape having an operation projection 78b that selectively projects from the upper surface of the two slide member 12R. Similarly, the lock member 79 selectively protrudes from the lower surface of the second slide member 12R to position the positioning hole 77a, 77b or 77c of the lower slider 72b.
And an operation projection 79b formed integrally with the engagement projection 79a and selectively projecting from the lower surface of the second slide member 12R where the lower slider 72b is not located. It is formed in a U-shape.

The lock members 78 and 79 are connected via a compression coil spring 80 in the second slide member 12R, and are provided with engagement projections 78a and 79a and operation projections 78b and 78b.
79b is urged to project from the upper and lower surfaces of the second slide member 12R.

According to the head width adjusting mechanism 9R, the observer presses the operation projections 78b, 79b toward the inside of the second slide member 12R with a finger against the spring force of the compression coil spring 80. By preventing the tips of the engagement projections 78a and 79a from projecting from the upper and lower surfaces of the second slide member 12R, the third slide member 71R can slide in the head width direction with respect to the second slide member 12R. Then, release the finger from the operation projections 78b, 79b at the desired slide position, and place the engagement projections 78a, 79a in the positioning holes 77a, 77b or 77 by the spring force of the compression coil spring 80.
c, the third slide member 71R is
It is positioned at a desired position with respect to the slide member 12R.

Left support member 6L and head width adjusting mechanism 9
L is configured similarly to the right support member 6R and the head width adjusting mechanism 9R, and the third slide member 71L is positioned at a desired position with respect to the second slide member 12L.

According to the study by the present inventors, regardless of the size of the head 101 and the size of the head width of the observer,
In order for the face pads 74a and 74b to be brought into contact with the observer's temple vicinity 106 so that the face pads 74a and 74b can be securely attached to the observer's head 101, the headband 5 should be positioned at the center thereof based on the statistical value of the head circumference. Radius of curvature R of the part is 60 mm to 70 m
m, an arc shape, an elliptical shape, or a free curve shape close to an arc shape, the maximum adjustment amount of each of the head circumference adjustment mechanisms 8L and 8R is 40 mm to 72 mm, and the maximum adjustment amount of each of the head width adjustment mechanisms 9L and 9R is It has been found that the distance should be 8 mm to 20 mm.

Therefore, in the present embodiment, the headband 5
Is 68 mm. Further, each of the first slide members 11L and 11R is formed so that the sawtooth-shaped click groove 63 can be moved by 12 steps at a pitch of 3.73 mm and can be moved by 44.76 mm.
Each of the second slide members 12L and 12R has a click groove 67 formed in a sawtooth waveform so as to be movable in seven steps at a pitch of 3.21 mm, and is capable of moving by 22.47 mm so that each of the head circumference adjusting mechanisms 8L and 8R. The maximum adjustment amount of
67.23 mm. Also, the third slide member 71
Three positioning holes 77a, 77b, 7 formed in the upper slider 72a and the lower slider 72b of each of the L and 71R.
The interval of 7c is 4 mm, and the maximum adjustment amount of each of the head width adjustment mechanisms 9L and 9R is 8 mm.

In the monocular HMD of the present embodiment configured as described above, in order to perform observation, first, the left and right face pads 74a and 74b respectively contact the left and right temple vicinity portions 106 of the observer. As described above, the first slide members 11L and 11R and the second slide members 12L and 12R
The headband 5 is mounted on the head 101 of the observer by adjusting R and the third slide members 71L and 71R.
The earphone 49 is inserted into the ear 104. Therefore, the video signal is operated by operating the controller and this monocular HMD
Is transmitted through the cable 47, an image based on the input video signal is projected on the LCD 37 of the viewer unit 3, and the light L1 related to the display image from the LCD 37 passes through the prism 14 and passes through the prism 14 to the right eye 102 of the observer. Eye point (E
P).

On the other hand, the light L2 from the front outside passes through the see-through prism 15 and the prism 14, and similarly forms an image on the eye point (EP) of the right eye 102 of the observer. Therefore, the observer can observe the display image of the LCD 37 by superimposing it on the front external image.

The audio signal is heard via the earphone 49. Since the earphone 49 is stored in the earphone mounting portion 4b of the arm portion 4 with the earphone opening facing the ear side, it is possible to listen to the sound even in the stored state.

As described above, the arm 4 can slide in the direction D1 with respect to the second slide member 12R, and can rotate in the θ2 and θ3 directions. About the hinge pins 41a and 41b. Therefore, the viewer 3 can be easily adjusted to the desired observation position and posture suitable for the work situation with respect to the right eye 102.

For example, if the position of the screen projected on the viewer unit 3 is inappropriate, the operation buttons 44 and 45 are operated to
Observation is performed while shifting the display screen position on the CD 37. Furthermore, if it is necessary to greatly change the direction and position of the screen, the viewer unit 3 is rotated in the left and right θ1 direction as described above, or the arm unit 4 is rotated in the left and right θ2 direction,
Alternatively, it is rotated in the vertical θ3 direction. If the distance in the direction of the display optical axis O is inappropriate, the arm 4 is slid to an appropriate position in the direction D1 in addition to the above-mentioned rotation operation.

As described above, the first slide members 11L, 1
1R, the second slide members 12L and 12R, and the third slide members 71L and 71R are adjusted, and the viewer unit 3 is rotated in the left and right θ1 directions, and the arm unit 4 is rotated in the right and left θ2 directions and up and down θ3. Each rotational position in the direction,
By properly adjusting the slide position in the direction D1 and D1, the monocular HMD is securely attached to the observer's head 101 regardless of the size of the observer's head 101 and the size of the head width, and the viewer The unit 3 can be adjusted to a desired observation position and posture suitable for the work situation with respect to the right eye unit 102.

Hereinafter, the manner of mounting the monocular HMD according to the size of the head and head width of the observer will be briefly described.

FIG. 1 shows a state in which both the head and the head are attached to an observer having a large head width.
L, 11R are located at positions extended forward of the observer from the intermediate slide position with respect to the headband 5, and the second slide members 12L, 12R are intermediate slides with respect to the corresponding first slide members 11L, 11R. At a position where it slides forward from the position, and the third slide member 71L,
The first protrusion 71R is positioned at the first position where the interval (head width) between the third slide members 71L and 71R is the largest, with the engagement projections 78a and 79a engaged with the positioning holes 77a.
Further, the arm portion 4 is at a position where the arm portion 4 has slid forward of the intermediate slide position with respect to the second slide member 12R.

FIG. 7 shows a state of attachment to an observer with a large head and a small head width.
The slide members 11L and 11R are at positions slightly slid forward, and the third slide members 71L and 71R are at the third position, that is, the engagement protrusions 78a and 79a
7c, the third slide member 71L, 71R is positioned at the position where the interval (head width) becomes the narrowest.
The arm 4 is located at a position slightly slid forward from the case of FIG.

FIG. 8 shows a state in which the head is mounted on an observer with a medium head and a large head width.
1L and 11R are located at positions retracted behind the observer from the intermediate slide position with respect to the headband 5, and the second
The slide members 12L, 12R are located at positions slightly slid rearward relative to the corresponding first slide members 11L, 11R from the case of FIG.
1R is positioned at the first position. Further, the arm portion 4 is located at a substantially middle slide position with respect to the second slide member 12R.

FIG. 9 shows a state in which the head is mounted on an observer with a medium head and a small head width.
1L and 11R are located at positions slightly extended forward from the case of FIG. 8, and the second slide members 12L and 12R are
In the position slightly slid backward from the case of
The slide members 71L and 71R are positioned at the third position. The arm 4 is located at a position slightly slid forward as compared with the case of FIG.

FIG. 10 shows a state in which the head is attached to an observer having a small head and a large head width.
L and 11R are located at the most recessed positions with respect to the headband 5, the second slide members 12L and 12R are located at positions slightly slid forward from the case of FIG. 9, and the third slide members 71L and 71R are It is positioned at the first position. Further, the arm part 4 includes a second slide member 12R.
Is located at a position slid backward from the intermediate slide position.

FIG. 11 shows a state in which both the head and the head width are mounted on an observer, and the first slide member 1 is shown in FIG.
1L and 11R are located at the most retracted positions relative to the headband 5 as in the case of FIG. 10, the second slide members 12L and 12R are located at positions slid more backward than in the case of FIG. The slide members 71L and 71R are the third
It is positioned at the position. Further, the arm portion 4 is located at a substantially middle slide position with respect to the second slide member 12R.

Although the mounting mode of the present monocular HMD according to the size of the head and head width of the observer has been described above, the present invention is not limited to the above-described mode, but may be applied to the size of the head and head width of the observer. The monocular HMD is adjusted as needed to adjust the observer's head 10
1, the viewer unit 3 can be adjusted to a desired observation position and posture with respect to the right eye unit 102.

In the monocular HMD, the right eye 10
In order to switch the observation eye side from 2 to the left eye portion 103, since the left and right support members 6L and 6R have the same structure,
If the headband 5 is mounted on the head with the armband 4 and the viewer unit 3 attached while the headband 5 is turned left and right, the observation eye side can be easily switched. However, at the start of observation, one of the changeover switches 34 (by operating the operation button 44)
While operating the other switch 35 (operation button 4
It is necessary to invert the display screen of the viewer unit 3 (by rotating it up and down, left and right, and rotate it 180 degrees) by pressing the button 5).

Even when the observation eye side is switched to the left eye portion 103 side as described above, the first slide members 11L, 11R, the second slide members 12L,
The mounting state can be adjusted by the 12R and the third slide members 71L and 71R, and the observation position and posture can be adjusted by the rotation and sliding movement of the arm unit 4 and the rotation of the viewer unit 3. Nose pad 19c
The viewer part 3 comes into contact with the nose part 107 by the action of
Movement to a myopic position is prevented.

Further, since the left and right support members 6L and 6R have the same structure, the right second slide member 12
The observation eye can be switched to the left or right by removing the ball 53 together with the arm part 4 and the joint part 13 from R and replacing it with the second slide member 12L on the left. In this case as well, the operation of inverting the display screen is necessary.

In the above embodiment, a field sequential type Si chip liquid crystal is used as the LCD 37, but a light receiving type LCD having a color filter or a self-luminous type organic EL can also be used.

[0079]

According to the present invention, there is provided a head-mounted image display device comprising: an exterior block containing image display means and an optical system; and a support block for holding the exterior block at an observation position. An elastically deformable headband extending in the form of an arc in the direction of the observer's head, and left and right support members respectively connected to both ends of the headband and provided so as to be able to contact the head; And left and right adjusting means for adjusting the position of the left and right support members with respect to the head, so that it can be made simple and inexpensive,
Regardless of the size of the observer's head and the head width, it can be securely attached to the observer's head and can be used for a long time.

[Brief description of the drawings]

FIG. 1 is a plan view diagrammatically showing a state in which a monocular HMD according to an embodiment of a head-mounted image display device according to the present invention is mounted on a head.

FIG. 2 is a cross-sectional view showing a specific configuration of the exterior block shown in FIG.

FIG. 3 is a view showing a state of rotation of the exterior block in a horizontal plane.

FIG. 4 is a view showing a state of rotation of the exterior block in a vertical plane.

FIG. 5 is a diagram showing a specific configuration of a support block shown in FIG.

FIG. 6 is a diagram showing a positional relationship between eyeglasses and a face pad when eyeglasses are used.

FIG. 7 is a diagram showing a state in which the monocular HMD shown in FIG. 1 is attached to an observer with a large head and a small head width.

FIG. 8 is a view showing a state of wearing the same on an observer with a medium head and a large head width.

FIG. 9 is also a view showing a state where the head is worn on an observer with a medium head and a small head width.

FIG. 10 is also a view showing a state where the camera is worn on an observer with a small head and a large head width.

FIG. 11 is also a view showing a state where the camera is worn on an observer with a small head and a small head width.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Exterior block 2 Support block 3 Viewer part 4 Arm part 5 Headband 6L, 6R Support member 7L, 7R Adjusting means 8L, 8R Head circumference adjustment mechanism 9L, 9R Head width adjustment mechanism 11L, 11R First slide member 12L, 12R 2 slide member 13 joint part 14 free-shaped prism (free-form surface prism) 15 see-through prism 37 Si chip liquid crystal (LCD) 101 head 102 right eye part 106 near temple

Claims (5)

[Claims] 1. An image display means, an optical system for projecting an image projected by the image display means and / or a surrounding environment to at least one eye of an observer, the image display means and the optical system A head-mounted video display device comprising: an exterior block containing a system; and a support block supported by the observer's head and holding the exterior block at an observation position. Elastically deformable headband extending in the direction of the arrow, left and right support members respectively connected to both ends of the headband and provided so as to be able to contact the head, and heads of the left and right support members And a left and right adjusting means for adjusting a position with respect to the head. 2. The apparatus according to claim 1, wherein each of the right and left adjusting means has a head circumference adjusting mechanism and a head width adjusting mechanism for respectively adjusting a position in a head circumference direction and a position in a head width direction of the corresponding support member. The head-mounted image display device according to claim 1. 3. Each of the head circumference adjustment mechanisms includes a first slide member that slides in a head circumference direction with respect to the headband, and a second slide member that slides in a head circumference direction with respect to the first slide member. The head-mounted image display device according to claim 2, further comprising: a support member attached to the second slide member via the head width adjustment mechanism. 4. The exterior block for a single eye, wherein the exterior block is supported by one of a first slide member and a second slide member of the left and right head circumference adjustment mechanisms.
2. The head mounted image display device according to 1. 5. The headband has a central radius of curvature of 60 mm to 70 mm, a maximum adjustment amount of each head circumference adjustment mechanism of 40 mm to 72 mm, and a maximum adjustment amount of each head width adjustment mechanism of 8 mm to 8 mm. The head-mounted image display device according to claim 3, wherein the length is 20 mm.