Image display device

Abstract

To provide an image display device that achieves both a reduction in the size of the device and simplification of adjustment in a left-and-right direction and a front-and-rear direction.SOLUTION: An image display device 100 comprises: a pair of display means 300L, 300R that display images; guide means 500L, 500R that guide the pair of display means 300L, 300R in a movement direction; and adjustment means 400, 304L, 304R that move the pair of display means 300L, 300R in the movement direction. When moving the pair of display means 300L, 300R in a direction in which they approach each other, the guide means 500L, 500R guide the pair of display means 300L, 300R in an image display direction, and when moving the pair of display means 300L, 300R in a direction in which they move away from each other, guide the pair of display means 300L, 300R in a direction opposite to the image display direction.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to an image display device. [Background technology]

[0002] In recent years, head-mounted displays (HMDs) that are worn on the head of an observer (operator) and display images in front of the observer's eyes have come into use as image display devices. HMDs are used as devices that allow users to experience virtual reality (VR), mixed reality (MR), etc., because they allow users to easily view images on a large screen and provide stereoscopic vision.

[0003] The HMD has a display optical system through which the observer observes an image. The image to be projected onto the observer's pupil is displayed on a display means such as a small liquid crystal panel, and this image is enlarged through a display optical system corresponding to the observer's left and right pupils, and then projected onto the observer's left and right eyeballs. In order for the observer to obtain a good image, it is required to be able to adjust the positions of the observer's pupil and the display optical system to appropriate positions. In the prior art, there is an interpupillary distance adjustment mechanism that allows the position of each display optical system to be adjusted in the interpupillary distance direction, which is the direction connecting the observer's left and right pupils, and a front-rear adjustment mechanism that allows adjustment by moving in the optical axis direction, which is the direction of the observer's line of sight.

[0004] For example, Patent Document 1 discloses a display device having an eye-distance adjustment mechanism for an image display unit, in which operation members are disposed on both the left and right sides of the device body, and eye-distance adjustment is performed by relatively operating in opposite directions. Patent Document 2 discloses an HMD device having a mechanism for adjusting the eye-distance by sliding an image display module part left and right, and a mechanism for adjusting the spatial distance between a head contact part and the image display module part by sliding a head hold part back and forth relative to the device body. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 11-38354 [Patent Document 2] Japanese Patent Application Publication No. 8-251509 Summary of the Invention [Problem to be solved by the invention]

[0006] However, the display device of the above-mentioned Patent Document 1 only has an interpupillary distance adjustment mechanism and is not capable of performing front-back adjustment. If an HMD device is equipped with both an interpupillary distance adjustment mechanism and a front-back adjustment mechanism as in Patent Document 2, the entire device will become larger, and the device configuration will become more complicated.

[0007] The present disclosure has been made in consideration of the above problems, and aims to provide an image display device that achieves both a compact device and easy adjustment of the display means in the left-right and front-back directions. [Means for solving the problem]

[0008] The image display device of the present disclosure comprises a pair of display means for displaying an image, a guide means for guiding the pair of display means in a movement direction, and an adjustment means for moving the pair of display means in the movement direction, and when the pair of display means are moved in a direction away from each other, the guide means guides the pair of display means in an image display direction defined by the pair of display means, and when the pair of display means are moved in a direction toward each other, the guide means guides the pair of display means in the opposite direction to the image display direction. Effect of the Invention

[0009] According to the present disclosure, an image display device is realized that achieves both a compact device and easy adjustment of the display means in the left-right and front-back directions. [Brief description of the drawings]

[0010] [Figure 1] 1 is a plan view showing an internal structure of an HMD according to a first embodiment, viewed from above. [Diagram 2] FIG. 2 is a perspective view showing a manner in which the HMD of the first embodiment is worn by an observer. [Diagram 3] 11 is a plan view showing the internal structure of an HMD according to a second embodiment, viewed from above. FIG. [Figure 4] FIG. 11 is a perspective view showing a part of the internal structure of an HMD according to a second embodiment. [Diagram 5] FIG. 11 is a plan view showing the internal structure of an HMD according to a third embodiment, viewed from above. [Figure 6] FIG. 11 is a plan view showing the internal structure of an HMD according to a third embodiment, viewed from above. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] [Basic configurations and functions of the image display device in various embodiments] Before specifically disclosing the various embodiments, the basic configurations and functions of the image display devices in the various embodiments will be described.

[0012] The image display device according to the present disclosure includes a pair of display means for displaying an image, a guide means for guiding the pair of display means in a moving direction, and an adjustment means for moving the pair of display means in the moving direction. When the pair of display means are moved in a direction away from each other, the guide means guides the pair of display means in an image display direction defined by the pair of display means. When the pair of display means are moved in a direction toward each other, the guide means guides the pair of display means in a direction opposite to the image display direction. The display means has an image display direction from the display means to the observation target of the image in relation to the observation target of the image that faces the display means and displays the image (views the image). The opposite direction of the image display direction is the direction from the observation target of the image to the display means. For example, a head mounted display (HMD) is assumed as the image display device, and in this case, the image display direction of the display means is a direction approaching the head of the observer perpendicular to the virtual straight line connecting the pair of display means. On the other hand, the opposite direction of the image display direction is a direction moving away from the head of the observer perpendicular to the virtual straight line connecting the pair of display means.

[0013] The size of the observer's head varies from large to small, and it is known that the larger (smaller) the head size, the larger (smaller) the interpupillary distance and the larger (smaller) the distance between the eyes and the display means tend to be. In the present disclosure, in order to adapt the HMD to this tendency, when the pair of display means are moved in a direction away from (closer to) each other, a configuration is adopted in which the pair of display means are guided in a direction toward (away from) the observer's head. This makes it possible to easily adjust the distance between the pair of display means and the distance between the observer's eyes and the display means in accordance with the observer's head size. In this way, the image display device of the present disclosure is capable of simultaneously appropriately adjusting the distance between the pair of display means and the distance between the observer's eyes and the display means with a simple device configuration, and can achieve both miniaturization of the device and simplification of adjustment of the display means in the left-right and front-back directions.

[0014] It is preferable that the guide means has a portion for guiding each of the pair of display means formed as an integral part. This allows for a device configuration with a reduced number of parts. The adjustment means moves the pair of display means simultaneously in a symmetrical manner. This allows for easy adjustment to be made to suit the observer's symmetrical eyes.

[0015] In addition to the above-mentioned configuration for simultaneously adjusting the distance between the pair of display means and the distance between the observer's eyes and the display means, an inclination angle adjustment means may be provided for adjusting the angle between the virtual line connecting the pair of display means and the moving direction of the display means. The inclination angle adjustment means is configured to adjust the inclination angle independently of the adjustment means so as to fit the shape of the observer's head. This allows for fine adjustment according to the shape of the observer's head. It is preferable that the inclination angle adjustment means adjusts the angle on one display means side and the angle on the other display means side to the same value simultaneously in conjunction with each other. This allows for angle adjustment to fit the observer's symmetrical eyes in a short time with a simple device configuration.

[0016] Preferred embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. Note that the following embodiments do not limit the invention according to the claims. Although the embodiments describe a number of features, not all of these features are essential to the invention, and the features may be combined in any manner. Furthermore, in the accompanying drawings, the same reference numbers are used for the same or similar configurations, and duplicated descriptions are omitted.

[0017] [First embodiment] The configuration of an HMD 100 as an image display device according to a first embodiment will be described below with reference to Fig. 1 and Fig. 2. Fig. 1 is a plan view showing the internal structure of the HMD 100 according to this embodiment from above. Fig. 2 is a perspective view showing how the HMD 100 is worn by an observer, with (a) showing one example and (b) showing another example. The HMD 100 is equipped with a housing 600 including temples to be fitted to the ears of the observer, and a nose pad 700, and is fitted to the head of the observer. 200R is the observer's right eye, and 200L is the observer's left eye.

[0018] The display unit is a display device that integrally holds an image display section that displays an image and an eyepiece optical system that enlarges and displays the image displayed on the image display section. Specifically, the left eye display unit 300L has a left eye display panel 301L that is an image display section, a left eye prism 302L that is an eyepiece optical system, and a left eye holder 303L that holds the left eye display panel 301L and the left eye prism 302L. The right eye display unit 300R has a right eye display panel 301R that is an image display section, a right eye prism 302R that is an eyepiece optical system, and a right eye holder 303R that holds the right eye display panel 301R and the right eye prism 302R. The eyepiece optical system of this embodiment is thinned by folding the optical path using a decentered reflecting curved surface. The left-eye prism 302L and the right-eye prism 302R are each made of a transparent body filled with an optical medium such as glass or plastic having a refractive index greater than 1.

[0019] When the vector of the virtual line connecting the left and right eyes 200L, 200R of the observer is taken as the X-axis, the display panels 301L, 301R are disposed between the left eye 200L and the right eye 200R at a position in the X-axis direction. With this configuration, it is possible to reduce the obstruction when viewing the real space outside the area displayed on the display panels 301L, 301R within the view angle of the observer. Here, the distance between the left eye 200L and the right eye 200R is taken as the interpupillary width A, and the distance from the eyeballs 200L, 200R to the prisms 302L, 302R is taken as the eye relief B.

[0020] In this embodiment, a rack and pinion is provided as an adjustment means that allows the display units 300L, 300R to be adjusted to correspond to the interpupillary distance A and the eye relief B. The rack and pinion has a pinion gear 400, racks 304L, 304R that engage with the pinion gear 400, and a dial 800 shown in FIG. 2. One end of the rack 304L is connected to the left-eye display unit 300L. One end of the rack 304R is connected to the right-eye display unit 300R. The dial 800 is connected to the pinion gear 400, and the display units 300L, 300R are configured to move simultaneously and symmetrically when the viewer operates the dial 800.

[0021] The left-eye rail 500L, which is a guide means, has a portion extending along the moving direction of the left-eye display unit 300L, and is slidably engaged with the display unit 300L so as to guide the moving direction of the display unit 300L. The right-eye rail 500R, which is a guide member, has a portion extending along the moving direction of the right-eye display unit 300R, and is slidably engaged with the display unit 300R so as to guide the moving direction of the display unit 300R. The left-eye rail 500L and the right-eye rail 500R are integrally configured and fixed to the housing 600. The material of the rails 500L and 500R may be a metal bar if high sliding performance is required. If a reduction in the number of parts is required, the material may be a resin material integrated with the housing 600.

[0022] The visual axis vector of the observer is a vector in the opposite direction to the image display direction defined by the display units 300L and 300R. Here, the visual axis vector is the Z axis. In this case, the left-eye rail 500L is angled at an angle θ A The right-eye rail 500R is inclined at an angle θ A The distance between the observer's head and the HMD 100 is fixed by the nose pad 700.

[0023] For some observers, when the position of the nose pad 700 is used as a reference, the eye relief B may increase at the same time as the interpupillary width A increases as the head shape increases, and the eye relief B may increase at the same time as the head shape decreases as the head shape decreases. Therefore, in this embodiment, the rails 500L and 500R are shaped as described above. As a result, if the interpupillary width A is adjusted to be large by moving the display units 300L and 300R in a direction away from each other, the display units 300L and 300R are simultaneously brought closer to the eyes 200L and 200R, and the eye relief B is adjusted to be small. If the interpupillary width A is adjusted to be small by moving the display units 300L and 300R in a direction toward each other, the display units 300L and 300R are simultaneously brought away from the eyes 200L and 200R, and the eye relief B is adjusted to be large. Therefore, even if a person has a large or small head shape as described above, the positions of the display units 300L, 300R are adjusted to match the interpupillary width A, and the eye relief B is also changed to an appropriate position, making it possible to roughly match the eye relief B regardless of the head shape.

[0024] In comparison with the present embodiment, the rails 500L and 500R are provided with a more general configuration. AA configuration in which the display units 300L and 300R are parallel to the X-axis without any inclination will be considered. In order to obtain the same effect as in this embodiment with this configuration, it is necessary to configure the display units 300L and 300R, or the entire housing 600 including them, to move along the Z-axis relative to the nose pad 700. If the adjustment to appropriately match the display unit position to the interpupillary distance A and the adjustment to appropriately match the eye relief B are performed using separate members, two adjustment procedures are required, which makes the mounting procedure complicated for the observer. Even if these adjustments are linked, two types of adjustment members are required because the two axes have different moving directions, and there is a concern that the entire product will become larger. In consideration of these issues, the rails 500L and 500R of this embodiment have a shape that achieves both simplified adjustment procedures and reduced product size.

[0025] Considering the variation in head shape of observers, the inclination angle θ A It is advisable to set an appropriate angle within the range of 10° to 30°. Also, the adjustment means is configured to engage with both racks 304L, 304R, like pinion gear 400, to operate display units 300L, 300R symmetrically and move them the same distance at the same time. This makes it difficult for a difference to occur between the eye relief B of the left eye and the eye relief B of the right eye.

[0026] In the above description, the glasses-type wearing style is assumed as shown in Fig. 2(a), but this embodiment can also be applied to a headband-like wearing style as shown in Fig. 2(b). In the case of a headband-like wearing style, the nose pad 700 that fixes the distance between the observer's head and the HMD 100 can be replaced with the top of the head 900 for discussion.

[0027] As described above, according to this embodiment, an HMD is realized that achieves both a compact device and easy adjustment of the display units 300L, 300R in the left-right and front-back directions.

[0028] [Second embodiment] The configuration of the HMD 110 according to the second embodiment will be described below with reference to Fig. 3 and Fig. 4. Fig. 3 is a plan view of the internal structure of the HMD 110 according to this embodiment captured from above, where (a) shows the case where the display units 310L and 310R are brought closer to the center, and (b) shows the case where the display units 310L and 310R are moved away from the center. Fig. 4 is a perspective view showing a part of the internal structure of the HMD 110 according to this embodiment.

[0029] The imaging cameras 1010L and 1010R as imaging means are stereo cameras for acquiring a real image of the surroundings to be displayed to the observer through the prisms 312L and 312R. The imaging cameras 1010L and 1010R are integrated with the display units 310L and 310R. Instead of the imaging cameras 1010L and 1010R, a camera may be provided as a position information acquiring means for acquiring alignment information. Alternatively, both the imaging means and the position information acquiring means may be provided, and the imaging cameras 1010L and 1010R may acquire the display image and the alignment information. The imaging cameras 1010L and 1010R of this embodiment are held by the holders 313L and 313R, and are configured to move simultaneously with the movement of the display units 310L and 310R. The imaging cameras 1010L and 1010R may be configured to be separated from the display units 310L and 310R and fixed to a housing. When the display units 310L, 310R and the imaging cameras 1010L, 1010R are fixed, the display magnification displayed on the image display units 311L, 311R may be changed according to the positions of the imaging cameras 1010L, 1010R.

[0030] The left eye display unit 310L has a left eye display panel 311L which is an image display unit, a left eye prism 312L which is an eyepiece optical system, and a left eye holder 313L which holds the left eye display panel 311L and the left eye prism 312L. The right eye display unit 310R has a right eye display panel 311R which is an image display unit, a right eye prism 312R which is an eyepiece optical system, and a right eye holder 313R which holds the right eye display panel 311R and the right eye prism 312R. The eyepiece optical system of this embodiment is thinned by folding the optical path using a decentered reflecting curved surface. The left eye prism 312L and the right eye prism 312R are made of a transparent body filled with an optical medium such as glass or plastic having a refractive index greater than 1.

[0031] The left-eye display unit 310L is positioned in the X-axis direction and the Y-axis direction, which is the screen vertical direction, with a rack 314L that engages with a pinion gear 410 in a rack and pinion that is an adjustment means, and is connected to be slidable only in the Z-axis direction. The right-eye display unit 310R is positioned in the X-axis direction and the Y-axis direction, which is the screen vertical direction, with a rack 314R that engages with the pinion gear 410, and is connected to be slidable only in the Z-axis direction. When the observer operates a dial (not shown), the pinion gear 410 connected to the dial rotates, and the display units 310L and 310R move simultaneously and symmetrically.

[0032] As shown in Fig. 4, the display unit 310L and the rack 314L are coupled to be slidable only in the Z direction, so that the holder 313L that holds the prism 312L forms a sliding surface 315L with the rack 314L. Similarly, the display unit 310R and the rack 314R are coupled to be slidable only in the Z direction, so that the holder 313R that holds the prism 312R forms a sliding surface with the rack 314R. With this configuration, the directions of the forces applied to the racks 314L, 314R and the pinion gear 410 during operation become approximately parallel, making design easier. Furthermore, further miniaturization is possible.

[0033] The left-eye rail 510L, which is a guide member, has a portion extending along the movement direction of the left-eye display unit 310L, and is slidably engaged with the display unit 310L so as to guide the movement direction of the display unit 310L. The right-eye rail 510R, which is a guide member, has a portion extending along the movement direction of the right-eye display unit 310R, and is slidably engaged with the display unit 310R so as to guide the movement direction of the display unit 310R. The left-eye rail 510L and the right-eye rail 510R are integrally formed and fixed to the housing. The material of the rails 510L and 510R may be a metal bar if high sliding performance is required. If a reduction in the number of parts is required, a resin material integrated with the housing may be used.

[0034] In this embodiment, as in the first embodiment, the distance between the left eye and the right eye is defined as the interpupillary distance, and the distance from each eyeball to the prism 312L, 312R is defined as the eye relief. The vector of the imaginary line connecting the left and right eyeballs of the observer is defined as the X-axis, and the visual axis vector of the observer is defined as the Z-axis. In this case, the left eye rail 510L is inclined at a predetermined angle with respect to the X-axis so that the adjustment means moves the left eye display unit 310L in the +X direction and simultaneously moves it in the +Z direction. The right eye rail 510R is inclined at a predetermined angle with respect to the X-axis so that the adjustment means moves the right eye display unit 310R in the -X direction and simultaneously moves it in the +Z direction. The distance between the observer's head and the HMD 110 is fixed by the nose pad.

[0035] If the interpupillary distance is adjusted to be larger by moving the display units 310L, 310R in directions away from each other, the display units 310L, 310R will simultaneously move closer to the respective eyes, and the eye relief will be adjusted to be smaller. If the interpupillary distance is adjusted to be smaller by moving the display units 310L, 310R in directions toward each other, the display units 310L, 310R will simultaneously move away from the respective eyes, and the eye relief will be adjusted to be larger. Therefore, even if a person has a large or small head shape, the eye relief can be changed to an appropriate position at the same time as adjusting the positions of the display units 310L, 310R to match the interpupillary distance, making it possible to roughly match the eye relief regardless of the head shape.

[0036] Considering the variation in head shapes of observers, the inclination angle should be set to an appropriate angle between 10° and 30° inclusive to fully cover the range of large and small head shapes. The adjustment means is configured to engage with both racks 314L, 314R, like pinion gear 410, to operate display units 310L, 301R symmetrically and move them the same distance at the same time. This makes it difficult for a difference to occur between the eye relief of the left eye and the eye relief of the right eye.

[0037] As described above, according to this embodiment, an HMD is realized that achieves both a compact device and easy adjustment of the display units 310L, 310R in the left-right and front-back directions.

[0038] [Third embodiment] The configuration of the HMD 120 according to the third embodiment will be described below with reference to Fig. 5 and Fig. 6. Fig. 5 is a plan view of the internal structure of the HMD 120 seen from above. Fig. 6 is a plan view of the internal structure of the HMD 120 seen from above, with (a) showing the state described in Fig. 5 and (b) showing a state in which the rail angle has been changed.

[0039] In this embodiment, rails 520L, 520R are engaged with frame 1320 so as to be rotatable about their respective axes as shown by the arrows in Fig. 5. Angle adjustment lever 1120 and other ends 521L, 521R of rails 520L, 520R are engaged as shown in Fig. 5. In addition to adjustment means that exhibit the same functions as those in the first and second embodiments, HMD 120 according to this embodiment has tilt angle adjustment means that can adjust rails 520L, 520R by the same angle amount in conjunction with each other by moving angle adjustment lever 1120 in the Z-axis direction.

[0040] The left eye display unit 320L has a left eye display panel 321L which is an image display unit, a left eye prism 322L which is an eyepiece optical system, and a left eye holder 323L which holds the left eye display panel 321L and the left eye prism 322L. The right eye display unit 320R has a right eye display panel 321R which is an image display unit, a right eye prism 322R which is an eyepiece optical system, and a right eye holder 323R which holds the right eye display panel 321R and the right eye prism 322R. The eyepiece optical system of this embodiment is thinned by folding the optical path using a decentered reflecting curved surface. The left eye prism 322L and the right eye prism 322R are made of a transparent body filled with an optical medium such as glass or plastic having a refractive index greater than 1.

[0041] The holders 323L and 323R are connected to the sliding parts 325L and 325R, respectively. The rotation restriction part 1220 is connected to the frame 1320 so as to be slidable only in the Z-axis direction, and the sliding parts 325L and 325R are arranged so as to be slidable only in the X-axis direction, thereby restricting the display units 320L and 320R from rotating along the Y-axis. The holder guides 326L and 326R are engaged with the rails 520L and 520R so as to be slidable in the guide direction, respectively, and are engaged with the holders 323L and 323R so as to be rotatable around the axis. With this configuration, even if the angle of the rails 520L and 520R is adjusted by the inclination angle adjustment means, the observer can maintain a position facing the prisms 322L and 322R held by the display units 320L and 320R.

[0042] The left-eye rail 520L, which is a guide member, has a portion extending along the movement direction of the left-eye display unit 320L, and is slidably engaged with the display unit 320L so as to guide the movement direction of the display unit 320L. The right-eye rail 520R, which is a guide member, has a portion extending along the movement direction of the right-eye display unit 320R, and is slidably engaged with the display unit 320R so as to guide the movement direction of the display unit 320R. The material of the rails 520L and 520R may be a metal bar if high sliding performance is required. If a reduction in the number of parts is required, the rails may be made of a resin material integrated with the housing.

[0043] In this embodiment, as in the first and second embodiments, the distance between the left and right eyes is defined as the interpupillary distance, and the distance from each eyeball to the prism 322L, 322R is defined as the eye relief. The vector of the imaginary line connecting the left and right eyeballs of the observer is defined as the X-axis, and the visual axis vector of the observer is defined as the Z-axis. In this case, the left eye rail 520L is inclined at a predetermined angle with respect to the X-axis so that the adjustment means moves the left eye display unit 320L in the +X direction and simultaneously moves it in the +Z direction. The right eye rail 520R is inclined at a predetermined angle with respect to the X-axis so that the adjustment means moves the right eye display unit 320R in the -X direction and simultaneously moves it in the +Z direction. The distance between the observer's head and the HMD 120 is fixed by the nose pad.

[0044] If the interpupillary distance is adjusted to be larger by moving the display units 320L, 320R in directions away from each other, the display units 320L, 320R will simultaneously move closer to the respective eyes, and the eye relief will be adjusted to be smaller. If the interpupillary distance is adjusted to be smaller by moving the display units 320L, 320R in directions toward each other, the display units 320L, 320R will simultaneously move away from the respective eyes, and the eye relief will be adjusted to be larger. Therefore, even if a person has a large or small head shape, the eye relief can be changed to an appropriate position at the same time as adjusting the positions of the display units 320L, 320R to match the interpupillary distance, making it possible to roughly match the eye relief regardless of the head shape.

[0045] In this embodiment, the adjustment means includes the screw parts 410L, 410R and a dial 820 that the viewer turns. The screw parts 410L, 410R have mutually symmetrical shapes, and while the screw part 410L is left-handed, the screw part 410R has a right-handed shape. The screw parts 410L, 410R are fixed to the frame 1320 in a configuration that allows them to turn along the X-axis, and are connected to the holder guides 326L, 326R via nut members 324L, 324R, which are connecting members. The holder guides 326L, 326R and the nut members 324L, 324R are engaged with each other so as to be rotatable around the Y-axis (first axis) and slidable along the Z-axis (second axis). When the dial 820 rotates and the screw portions 410L, 410R rotate, the force that moves the nut members 324L, 324R in the X-axis direction is transmitted to the holder guides 326L, 326R. With this configuration, even if the angle of the rails 520L, 520R is adjusted by the inclination angle adjustment means described above, the screw-in portions of the screw portions 410L, 410R and the nut members 324L, 324R are not deformed.

[0046] In Fig. 6, (b) shows a state in which the rail angle has been changed by the tilt angle adjustment means, compared to the state (a) described in Fig. 5. In this way, by moving the angle adjustment lever 1120 of the tilt angle adjustment means in the Z-axis direction, the angles of the rails 520L, 520R change in conjunction with each other to the same value. In this case, it is possible to move the positions in the Z direction without changing the positions of the display units 320L, 320R in the X-axis direction.

[0047] By using the above configuration, it is possible to provide an HMD that is suitable for observers with a wider variety of head shapes. It is considered that the angle adjustment lever 1120 of the inclination angle adjustment means that adjusts the angle of the rails 520L, 520R is used less frequently than the dial 820 of the adjustment means that moves the display units 320L, 320R in the guide direction of the rails 520L, 520R. Therefore, it is preferable to design the angle adjustment lever 1120 to be less noticeable than the dial 820. Alternatively, the angle adjustment of the rails 520L, 520R may be performed by electrical control.

[0048] As described above, according to this embodiment, an HMD is realized which achieves both miniaturization of the device and simplification of adjustment of the display units 320L, 320R in the left-right and front-back directions, while allowing the tilt angle to be adjusted independently of adjustment by the adjustment means to better suit the shape of the observer's head.

[0049] Although the preferred embodiments have been described above, the present disclosure is not limited to these embodiments, and various modifications and changes are possible within the scope of the gist of the present disclosure.

[0050] The disclosure of various embodiments includes the following configurations. (Configuration 1) a pair of display means for displaying an image; a guide means for guiding the pair of display means in a moving direction; an adjustment means for moving the pair of display means in the movement direction; It is equipped with The guide means is When the pair of display means are moved in a direction away from each other, the pair of display means are guided in an image display direction defined by the pair of display means; When the pair of display means are moved in a direction approaching each other, the pair of display means are guided in a direction opposite to the image display direction. 1. An image display device comprising: (Configuration 2) The guide means has a portion for guiding the pair of display means formed integrally therewith. 2. The image display device according to configuration 1. (Configuration 3) The adjustment means moves the pair of display means simultaneously in a symmetrical manner. 3. The image display device according to configuration 1 or 2. (Configuration 4) The adjustment means is constituted by a rack and pinion. The image display device according to any one of configurations 1 to 3. (Configuration 5) One end of the rack of the rack and pinion is connected to the pair of display means. 5. The image display device according to configuration 4. (Configuration 6) The adjustment means has a sliding surface at a portion that engages with the pair of display means. 6. The image display device according to any one of configurations 1 to 5. (Configuration 7) The guide means has a portion extending along the movement direction. The image display device according to any one of configurations 1 to 6. (Configuration 8) the magnitude of the inclination angle between the virtual line connecting the pair of display means and the movement direction is 10° or more and 30° or less; 8. The image display device according to configuration 7. (Configuration 9) the display means is a display unit integrally holding an image display section for displaying an image and an eyepiece optical system for enlarging and displaying the image displayed on the image display section; The image display device according to any one of configurations 1 to 8. (Configuration 10) the image display unit is disposed between a left eye and a right eye of an observer positioned at the display unit; 10. The image display device according to configuration 9. (Configuration 11) The present invention provides a method for detecting an image of a surrounding area by using a position information acquisition unit, the method comprising: acquiring an image of the surrounding area by using a position information acquisition unit; 11. The image display device according to any one of configurations 1 to 10. (Configuration 12) The imaging means is integrated with the display means. 12. The image display device according to configuration 11. (Configuration 13) a tilt angle adjusting means for adjusting an angle between a virtual line connecting the pair of display means and the moving direction, 13. The image display device according to any one of configurations 1 to 12. (Configuration 14) The tilt angle adjustment means adjusts the angles of the pair of display means symmetrically to the same value. 14. The image display device according to configuration 13. (Configuration 15) the display means is connected to the guide means via a connecting member, The connection member is engaged with the display means so as to be rotatable about a first axis and slidable along a second axis perpendicular to the first axis. 15. The image display device according to configuration 13 or 14. [Explanation of symbols]

[0051] 100: Image display device 200: Eyes 300: Display unit 301: Image display unit 302: Eyepiece optical system 303: Holder 304: Rack 400: Pinion gear 500: Rail 600: Housing 700: Nose pad

Claims

1. a pair of display means for displaying an image; a guide means for guiding the pair of display means in a moving direction; an adjustment means for moving the pair of display means in the movement direction; Equipped with The guide means is When the pair of display means are moved in a direction away from each other, the pair of display means are guided in an image display direction defined for the pair of display means; When the pair of display means are moved in a direction approaching each other, the pair of display means are guided in a direction opposite to the image display direction.

1. An image display device comprising:

2. The guide means has a portion for guiding the pair of display means formed integrally therewith. The image display device according to claim 1 .

3. The adjustment means moves the pair of display means simultaneously in a symmetrical manner. The image display device according to claim 1 .

4. The adjustment means is constituted by a rack and pinion. The image display device according to claim 1 .

5. One end of the rack of the rack and pinion is connected to the pair of display means. The image display device according to claim 4.

6. The adjustment means has a sliding surface at a portion that engages with the pair of display means. The image display device according to claim 1 .

7. The guide means has a portion extending along the movement direction. The image display device according to claim 1 .

8. the magnitude of the inclination angle between the virtual line connecting the pair of display means and the movement direction is 10° or more and 30° or less; The image display device according to claim 7.

9. the display means is a display unit integrally holding an image display section for displaying an image and an eyepiece optical system for enlarging and displaying the image displayed on the image display section; The image display device according to claim 1 .

10. the image display unit is disposed between a left eye and a right eye of an observer positioned at the display unit; The image display device according to claim 9.

11. The present invention provides a method for detecting an image of a surrounding area by using a position information acquisition unit, the method comprising: acquiring an image of the surrounding area by using a position information acquisition unit; The image display device according to claim 1 .

12. The imaging means is integrated with the display means. The image display device according to claim 11.

13. a tilt angle adjusting means for adjusting an angle between a virtual line connecting the pair of display means and the moving direction, The image display device according to claim 1 .

14. The tilt angle adjustment means adjusts the angles of the pair of display means symmetrically to the same value. The image display device according to claim 13.

15. the display means is connected to the guide means via a connecting member, The connecting member is engaged with the display means so as to be rotatable about a first axis and slidable along a second axis perpendicular to the first axis. The image display device according to claim 13.

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