Virtual image display device

Abstract

The utility model relates to the technical field of virtual reality imaging device discloses a virtual image display device, including the casing with the inner chamber of big down of small up and the display of installation in the inner chamber bottom, the casing front side has the opening of oblique arrangement, is equipped with the plane light combination glass on the opening, is provided with the curved mirror in the inner chamber, its reflection surface is towards the plane light combination glass arrangement, at work, the light of display emits and is incident to the plane light combination glass, is reflected to the curved mirror, after the reflection of curved mirror, again incident to the plane light combination glass, emits from the plane light combination glass. The reflection of plane light combination glass to the light of display emission makes the virtual image display device reduce on the space size, forms the virtual image of amplification through the curved mirror, makes the user can watch the visual effect of big size screen. The virtual image display device does not need the user to wear on the head, so it is not easy to produce the dizziness feeling. The display sets up in the inner chamber of casing, is not easy to be hurt and be damaged.

Description

Technical Field

[0001] This utility model relates to the technical field of virtual reality imaging devices, and more specifically, to a virtual image display device. Background Technology

[0002] Virtual image imaging technology is an important optical imaging method widely used in virtual reality (VR), augmented reality (AR), 3D displays, and immersive visual systems. Common virtual image imaging devices include VR head-mounted displays (HMDs), which magnify and project images from micro-displays (such as OLEDs or LCDs) through lens systems or optical reflection systems, giving users the visual effect of viewing a large screen.

[0003] For example, in the prior art CN209514209U, a microdisplay imaging optical system based on an optical prism is introduced. Its optical prism design includes an incident surface, a total internal reflection surface, and an exit surface. The total internal reflection surface is used to optimize the optical path, allowing light to form a larger virtual image in front of the user. This system is mainly suitable for near-eye display devices (such as VR / AR glasses). However, many people are not comfortable with head-mounted near-eye display devices, which can easily cause dizziness. Existing virtual image display devices are often structurally complex and have high production costs. Utility Model Content

[0004] The purpose of this invention is to provide a virtual image imaging device, which aims to solve the problem that head-mounted near-eye display devices are not suitable for certain groups of people in the prior art.

[0005] This invention is implemented as follows: a virtual image display device includes a housing and a display. The housing has an internal cavity with a space that is smaller at the top and larger at the bottom. The display is located at the bottom of the internal cavity. The front side of the housing has an inclined opening, on which a planar light-combining glass is installed. A curved reflector is disposed in the internal cavity, with its reflective surface facing the planar light-combining glass and its back surface facing the back of the housing. When the virtual image display device is working, the light emitted by the display is incident on the planar light-combining glass, reflected to the curved reflector, reflected again by the curved reflector, and then incident on the planar light-combining glass before exiting.

[0006] Furthermore, the curved reflector is a concave mirror.

[0007] Furthermore, in the imaging optical path, the distance from the display to the planar light-combining glass is L1, the distance from the planar light-combining glass to the curved reflector is L2, and the focal length of the curved reflector is f, where L1 + L2 <f。

[0008] Furthermore, a light-shielding element is provided above the opening, and the light-shielding element is snapped together with the housing. A camera is provided on the top wall of the light-shielding element, and the camera is arranged facing forward.

[0009] Furthermore, a control board is provided in the inner cavity, the camera is electrically connected to the control board, and the display is electrically connected to the control board.

[0010] Furthermore, it also includes a middle shell, which is fitted onto the opening of the housing. The front side of the middle shell has a front end plate, and the front end plate is provided with a plurality of front heat dissipation holes arranged in a row. The two side walls of the housing are provided with side heat dissipation holes.

[0011] Furthermore, the top of the curved reflector is provided with a plurality of upper pressing blocks, each upper pressing block having an embedding groove. The groove shape of the embedding groove matches the top shape of the curved reflector, and the top of the curved reflector is embedded in the embedding groove.

[0012] Furthermore, the embedding groove is also provided with elastic pads, which are clamped on both sides of the top of the curved reflector.

[0013] Furthermore, the bottom of the curved reflector is provided with multiple lower support blocks, each lower support block having a bent support portion, the sidewall shape of which matches the bottom shape of the curved reflector.

[0014] Furthermore, a support is provided on the back of the housing, the support including a vertically arranged support rod and a bottom bracket at the bottom end of the support rod, the bottom bracket being arranged in a U-shaped opening.

[0015] Compared with existing technologies, the virtual image display device provided by this utility model reduces the spatial size of the device by reflecting light emitted from the display through a planar light-reflecting glass; the magnified virtual image is formed by a curved reflector, allowing users to view the visual effect of a large screen with a wide field of view. This virtual image display device does not require the user to wear it on their head, thus reducing the likelihood of dizziness. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of a virtual image display device provided by this utility model;

[0017] Figure 2 This is a disassembly diagram of a virtual image display device provided by this utility model;

[0018] Figure 3 This is a three-dimensional schematic diagram of a curved reflector of a virtual image display device provided by this utility model;

[0019] Figure 4This is a schematic diagram of the planar light-combining glass adjustment structure of a virtual image display device provided by this utility model.

[0020] Explanation of reference numerals in the attached figures:

[0021] 100-Housing shell, 110-Middle shell, 111-Front heat dissipation hole, 112-Side heat dissipation hole, 120-Fixing frame, 131-Lead screw, 132-Guide rod, 133-Slider, 134-Abutting rod, 140-Drive motor; 200-Display, 300-Flat glass, 310-Outer frame, 311-Positioning hole, 320-Reset spring; 400-Curved reflector, 410-Upper pressure block, 420-Lower support block, 500-Bracket, 510-Support rod, 520-Bottom bracket; 600-Light shield, 700-Camera, 800-Control board. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0023] The implementation of this utility model will be described in detail below with reference to specific embodiments.

[0024] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0025] Reference Figures 1-4 The image shown is a preferred embodiment of the present invention.

[0026] A virtual image display device includes a housing 100 and a display 200. The interior of the housing 100 has an inner cavity, and the space of the inner cavity is arranged with a smaller upper part and a larger lower part. The display 200 is disposed at the bottom of the inner cavity; the front side of the housing 100 has an inclined opening, and a flat light-combining glass 300 is installed on the opening; a curved mirror 400 is disposed in the inner cavity, the reflecting surface of the curved mirror 400 faces the flat light-combining glass 300, and the back surface of the curved mirror 400 faces the back surface of the housing 100; when the virtual image display device works, the light emitted by the display 200 is incident on the flat light-combining glass 300, reflected to the curved mirror 400, and after being reflected by the curved mirror 400, is incident on the flat light-combining glass 300 again and exits from the flat light-combining glass 300.

[0027] The virtual image display device provided in this embodiment, through the reflection of the light emitted by the display 200 by the flat light-combining glass 300, is equivalent to folding the optical path, so that the virtual image display device is reduced in spatial size; an enlarged virtual image is formed through the curved mirror 400, so that the user can view the visual effect of a large-size screen with a large viewing angle. This virtual image display device does not need to be worn on the head by the user, so it is not easy to cause dizziness. Moreover, a relatively small-sized display 200 can be used for the display 200, and through the magnification processing of the virtual image display device, an enlarged virtual image can be observed. The display 200 is disposed in the inner cavity of the housing 100 and is protected by the housing 100 and is not easily damaged by bumps.

[0028] Compared with head-mounted devices, in terms of design and manufacturing difficulty, the virtual image display device of this embodiment is much simpler, and a larger viewing angle can also be obtained, and the visual effect of a large-size screen is better.

[0029] The curved mirror 400 is a concave mirror. The reflecting surface type of the concave mirror can be a spherical surface, an aspherical surface or a free-form surface. The spherical mirror is the easiest to process and has a lower cost. The aspherical concave mirror minimizes its marginal aberration and makes the field of view wider. The free-form surface concave mirror can minimize its aberration and improve the imaging quality.

[0030] On the imaging optical path, the distance from the display 200 to the flat light-combining glass 300 is L1, the distance from the flat light-combining glass 300 to the curved mirror 400 is L2, and the focal length of the curved mirror 400 is f. Among them, L1 + L2 < f. In this way, a upright and enlarged virtual image is formed through the curved mirror 400.

[0031] Specifically, a light-shielding component 600 is provided above the opening, and the light-shielding component 600 is snapped together with the housing 100. A camera 700 is mounted on the top wall of the light-shielding component 600, facing forward. The two sides of the light-shielding component 600 are snapped together with the two sides of the housing 100, and the top wall of the light-shielding component 600 extends backward and connects with the top of the housing 100. The light-shielding component 600 can reduce the adverse effects of external stray light on the imaging of the virtual image display device, and can also reduce dust falling onto the planar light-combining glass 300.

[0032] Furthermore, a control board 800 is provided within the internal cavity. The camera 700 and the display 200 are electrically connected to the control board 800. The control board 800 has control circuitry, allowing the camera 700 to capture images of the user in front, thus enabling eye-tracking functionality. Alternatively, it can implement automatic power-on / off functionality. For example, when the camera 700 detects a user viewing the virtual image display device, it can activate the display on the monitor 200. When the camera 700 detects that no user has viewed the virtual image display device for a set period of time, it can deactivate the display on the monitor 200, thereby saving energy and reducing equipment wear and tear.

[0033] Specifically, the virtual image display device also includes a middle shell 110, which is fitted onto the opening of the housing 100. A front panel is located on the front side of the middle shell 110, and the front panel has multiple front heat dissipation holes 111 arranged in a circular pattern. Side heat dissipation holes 112 are provided on both side walls of the housing 100. The front panel can be rectangular, with the multiple front heat dissipation holes 111 neatly arranged within the rectangular area. The side heat dissipation holes 112 can be multiple small holes arranged in a circular pattern. Through the arrangement of the front heat dissipation holes 111 and the side heat dissipation holes 112, convection can be formed to dissipate the heat generated during the operation of the display 200, control board 800, and other structures.

[0034] In one embodiment, a mounting hole is provided in the middle of the front panel, and the camera 700 is disposed in the mounting hole. In this way, the camera 700 can also capture the situation of the user in front, and the distance between the camera 700 and the control board is relatively close, which facilitates the electrical connection between the two. Furthermore, a miniature camera can be used, so the size of the mounting hole is also relatively small, the camera will not appear obtrusive, and the overall shape will appear harmonious.

[0035] Furthermore, the top of the curved reflector 400 is provided with multiple upper pressure blocks 410, each with an embedding groove. The shape of the embedding groove matches the shape of the top of the curved reflector 400, and the top of the curved reflector 400 is embedded in the embedding groove. The multiple embedding grooves can effectively limit the swaying of the curved reflector 400, and the multiple upper pressure blocks 410 can securely fix the curved reflector 400 in the inner cavity.

[0036] Furthermore, an elastic pad is provided within the embedding groove, which is clamped on both sides of the top of the curved reflector 400. The clamping and fixing by the elastic pad makes the clamping of the curved reflector 400 more stable, and also makes it less likely for the fixing block to damage the curved reflector 400.

[0037] Multiple lower support blocks 420 are provided at the bottom of the curved reflector 400. Each lower support block 420 has a bent support portion, and the sidewall shape of the support portion matches the bottom shape of the curved reflector 400. The support portions of the multiple lower support blocks 420 provide effective support for the curved reflector 400 and make the overall surface of the curved reflector 400 less prone to shaking.

[0038] A support 500 is provided on the back of the housing 100. The support 500 includes a vertically arranged support rod 510 and a base bracket 520 located at the bottom end of the support rod 510. The base bracket 520 is arranged in a U-shape. The top end of the support rod 510 is connected to the housing 100, and the bottom end of the support rod 510 is connected to the base bracket 520. The U-shaped opening of the base bracket 520 faces forward, so that the support 500 can provide good support for the virtual image display device.

[0039] In another embodiment, a fixed frame 120 is provided at the edge of the opening. A planar light-reflecting glass 300 is mounted on the fixed frame 120 from top to bottom. A lead screw 131 and a guide rod 132 are vertically arranged on the inner wall of the fixed frame 120, with the lead screw 131 and guide rod 132 arranged in parallel. A slider 133 is threaded onto the lead screw 131. The slider 133 has a guide hole, through which the guide rod 132 passes. An abutment rod 134 is also provided on the slider 133, arranged parallel to the guide rod 132. A through hole is provided on the fixed frame 120, through which the abutment rod 134 passes. The through hole is connected to the outer end of the abutment rod 134, which abuts against the top of the planar light-combining glass 300. The inner cavity is also equipped with a drive motor 140, which is connected to a drive gear. The drive gear meshes with the lead screw 131. When the drive motor 140 rotates, it drives the lead screw 131 to rotate, thereby driving the slider 133 to move back and forth along the guide rod 132. This causes the top position of the planar light-combining glass 300 to change, and the tilt angle of the planar light-combining glass 300 to change. This allows for fine adjustment of the imaging position and clarity of the virtual image.

[0040] Furthermore, the outer side of the planar light-combining glass 300 has an outer frame 310, and the top of the outer frame 310 is provided with a positioning hole 311. The outer end of the abutment rod 134 abuts in the positioning hole 311, so that the outer end of the abutment rod 134 will not deviate from the positioning hole 311 during the adjustment process, thus avoiding the situation where the adjustment fails due to deviation from the positioning hole 311.

[0041] Furthermore, a return spring 320 is also provided on the outer frame 310. One end of the return spring 320 is connected to the outer frame 310, and the other end is connected to the housing 100. The return spring 320 is always in a stretched state, tending to pull the outer frame 310 closer to the fixed frame 120, so that the top of the outer frame 310 will not disengage from the abutment of the abutment rod 134.

[0042] Furthermore, the bottom of the fixed frame 120 (corresponding to the lower edge of the planar light-combining glass 300, not shown) is provided with a recessed groove, and the bottom of the outer frame 310 is provided with a roller, which is installed in the recessed groove. When the top of the outer frame 310 is adjusted by the abutment rod 134, it is equivalent to the planar light-combining glass 300 rotating at a certain angle relative to the recessed groove, thereby changing the tilt angle of the planar light-combining glass 300 and making a fine adjustment to the virtual image.

[0043] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A virtual image display device, characterized in that, The device includes a housing and a display. The housing has an internal cavity with the space of the cavity being smaller at the top and larger at the bottom. The display is located at the bottom of the internal cavity. The front side of the housing has an inclined opening, and a planar light-reflecting glass is installed on the opening; A curved reflector is provided in the inner cavity, with the reflecting surface of the curved reflector facing the planar light-combining glass and the back surface of the curved reflector facing the back surface of the housing. When the virtual image display device is working, the light emitted by the display is incident on the planar light-combining glass, reflected to the curved reflector, reflected by the curved reflector, and then incident on the planar light-combining glass again, and exited from the planar light-combining glass.

2. The virtual image display device as described in claim 1, characterized in that, The curved reflector is a concave mirror.

3. The virtual image display device as described in claim 2, characterized in that, In the imaging optical path, the distance from the display to the planar light-combining glass is L1, the distance from the planar light-combining glass to the curved reflector is L2, and the focal length of the curved reflector is f, where L1 + L2 <f。 4. The virtual image display device as described in claim 3, characterized in that, A light-shielding element is provided above the opening. The light-shielding element is snapped together with the housing. A camera is provided on the top wall of the light-shielding element, and the camera is arranged facing forward.

5. The virtual image display device as described in claim 4, characterized in that, A control board is provided in the inner cavity, the camera is electrically connected to the control board, and the display is electrically connected to the control board.

6. The virtual image display device as described in claim 5, characterized in that, It also includes a middle shell, which is fitted onto the opening of the housing. The front side of the middle shell has a front end plate, and the front end plate is provided with a plurality of front heat dissipation holes arranged in a row. The two side walls of the housing are provided with side heat dissipation holes.

7. A virtual image display device as described in any one of claims 1-6, characterized in that, The top of the curved reflector is provided with multiple upper pressure blocks, each upper pressure block having an embedding groove. The groove shape of the embedding groove matches the top shape of the curved reflector, and the top of the curved reflector is embedded in the embedding groove.

8. The virtual image display device as described in claim 7, characterized in that, The embedding groove is also provided with elastic pads, which are clamped on both sides of the top of the curved reflector.

9. A virtual image display device as described in claim 8, characterized in that, The bottom of the curved reflector is provided with multiple lower support blocks, each lower support block having a bent support portion, the sidewall shape of which matches the bottom shape of the curved reflector.

10. A virtual image display device according to any one of claims 1-6, characterized in that, The back of the housing is provided with a support, which includes a vertically arranged support rod and a bottom bracket located at the bottom end of the support rod. The bottom bracket is arranged in a U-shaped opening.

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