A virtual image display device with a large field of view

Abstract

The utility model relates to the technical field of virtual reality imaging device discloses a virtual image display device of big field of view angle, including the casing with inner chamber and display, and the display is installed in the casing top, the casing has the inclined surface of inclined arrangement, is provided with the plane light combinatorial glass on the inclined surface, is provided with the curved surface mirror in the inner chamber, and the reflection surface of curved surface mirror is towards the plane light combinatorial glass arrangement, in working, the light that the display emits is incident on the plane light combinatorial glass, is reflected to the curved surface mirror, after the reflection of curved surface mirror, again incident to the plane light combinatorial glass, and the emission is from the plane light combinatorial glass. The reflection of the light that the display emits through the plane light combinatorial glass makes the virtual image display device reduce on the space size, forms the visual effect that the user can watch the big size screen of big field of view angle through the curved surface mirror to the enlarged virtual image. 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.

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 with a large field of view. 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 with a large field of view, 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 with a large field of view includes a housing and a display. The housing has an inner cavity, and the top of the housing has a mounting position that communicates with the inner cavity. The display is mounted in the mounting position, and the light-emitting surface of the display faces the inner cavity. The housing has an inclined surface arranged at an angle, and the inclined surface has an inclined mounting position that communicates with the inner cavity. A planar light-combining glass is disposed on the inclined mounting position. A curved reflector is disposed in the inner cavity, and the reflecting surface of the curved reflector faces the planar light-combining glass. 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 and exited from the planar light-combining glass.

[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, each side of the housing is provided with a support leg. The support leg includes a first support leg connected to the housing. The first support leg is inclined toward the inclined surface. A second support leg is sleeved in the middle of the first support leg. The second support leg is arranged in a cross shape with the first support leg.

[0009] Furthermore, the top of the first leg is hinged to the side of the housing, the upper part of the first leg is provided with a through hole, and the side is provided with a plurality of screw holes arranged in an arc shape. A screw rod is inserted into the through hole and the screw rod is threadedly connected to the screw hole.

[0010] Furthermore, the top of the curved reflector is provided with a plurality of fixing blocks, each fixing block having an embedding groove, the groove shape of which matches the top shape of the curved reflector, and the top of the curved reflector is embedded in the embedding groove.

[0011] Furthermore, the embedding groove is also provided with elastic pads, which are clamped on both sides of the top of the curved reflector.

[0012] Furthermore, the inclined mounting position includes a fixed frame and a through hole communicating with the inner cavity. The top of the fixed frame is provided with an adjusting screw hole, and an adjusting screw is provided in the adjusting screw hole. The inner end of the adjusting screw abuts against the top of the planar light-combining glass.

[0013] Furthermore, the outer side of the planar light-combining glass has an outer frame, and the top of the outer frame is provided with a positioning hole, and the inner end of the adjusting screw abuts in the positioning hole.

[0014] Furthermore, a return spring is also provided on the outer frame, with one end of the return spring connected to the outer frame and the other end connected to the inner wall of the housing.

[0015] Compared with existing technologies, this utility model provides a virtual image display device with a large field of view. By reflecting the light emitted from the display through a planar light-combining glass, the virtual image display device is reduced in size. The magnified virtual image is formed by a curved reflector, allowing users to experience 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 with a large field of view provided by this utility model;

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

[0018] Figure 3 This is a three-dimensional schematic diagram of an embodiment of a virtual image display device with a large field of view provided by this utility model;

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

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

[0021] 100-Housing, 110-Inner cavity, 120-Mounting position, 130-Tilt mounting position, 131-Fixing frame, 132-Adjusting screw, 140-Screw hole; 200-Display, 300-Flat glass, 310-Outer frame, 311-Positioning hole, 320-Reset spring; 400-Curved reflector, 410-Fixing block, 420-Rear support, 500-Leg, 510-First leg, 520-Second leg. 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 Figure 1-4 The image shown is a preferred embodiment of the present invention.

[0026] A virtual image display device with a large viewing angle includes a housing 100 and a display 200. The interior of the housing 100 has an inner cavity 110, and the top of the housing 100 has a mounting position 120 that penetrates through to the inner cavity 110. The display 200 is installed in the mounting position 120, and the light-emitting surface of the display 200 faces the inner cavity 110. The housing 100 has an inclined surface, and the inclined surface has an inclined mounting position 130 that penetrates through to the inner cavity 110. A planar light-combining glass 300 is provided on the inclined mounting position 130. A curved mirror 400 is provided in the inner cavity 110, and the reflecting surface of the curved mirror 400 faces the planar light-combining glass 300. When the virtual image display device is working, the light emitted by the display 200 is incident on the planar light-combining glass 300, reflected to the curved mirror 400, and after being reflected by the curved mirror 400, is incident on the planar light-combining glass 300 again and exits from the planar light-combining glass 300.

[0027] In the virtual image display device with a large viewing angle provided in this embodiment, the reflection of the light emitted by the display 200 by the planar light-combining glass 300 is equivalent to folding the optical path, so that the virtual image display device is reduced in spatial size; a magnified virtual image is formed through the curved mirror 400, enabling the user to 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 user's head, so it is not easy to cause a sense of dizziness.

[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 spherical, aspherical or free-form surface. The spherical mirror is the easiest to process and has a lower cost. The aspherical concave mirror minimizes the 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 planar light-combining glass 300 is L1, the distance from the planar 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 magnified virtual image is formed through the curved mirror 400.

[0031] Legs 500 are provided on both sides of the housing 100. The legs 500 include a first leg 510 connected to the housing 100. The first leg 510 is arranged obliquely towards the inclined surface. A second leg 520 is sleeved in the middle of the first leg 510, and the second leg 520 is arranged in a crossed shape with the first leg 510. The crossed legs on both sides of the housing 100 can form a stable support for the virtual image display device and prevent it from tipping over.

[0032] In one embodiment, the top of the first leg 510 is hinged to the side of the housing 100. The upper part of the first leg 510 is provided with a through hole, and the side is provided with a plurality of arc-shaped screw holes 140. A screw rod is inserted into the through hole and threadedly connected to the screw hole 140. The plurality of arc-shaped screw holes 140 correspond to a plurality of different tilt angles. That is to say, the tilt angle of the housing 100 relative to the leg is adjustable, that is, the angle of the polished surface can be adjusted to meet the needs of different viewing angles in different occasions.

[0033] Specifically, the top of the curved reflector 400 is provided with multiple fixing 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 fixing blocks 410 can securely fix the curved reflector 400 in the inner cavity 110.

[0034] A rear support 420 is provided on the back of the curved reflector 400. The rear support 420 has a supporting surface whose shape matches the back shape of the curved reflector 400. The rear support 420 can be fixed to the inner wall of the housing 100, thus making the curved reflector 400 more securely fixed. The rearward extension of the fixing block can be connected to the top of the rear support by screws, further optimizing the fixing of the curved reflector.

[0035] Furthermore, an elastic pad is provided in 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 makes it less likely for the fixing block 410 to damage the curved reflector 400.

[0036] In another embodiment, the tilt mounting position 130 includes a fixing frame 131 and a through hole communicating with the inner cavity 110. The top of the fixing frame 131 is provided with an adjusting screw hole, and an adjusting screw 132 is provided in the adjusting screw hole. The inner end of the adjusting screw 132 abuts against the top of the planar light-combining glass 300. By rotating the adjusting screw 132, the inner end of the adjusting screw 132 is screwed into or away from the inner cavity 110 relative to the fixing frame 131. Since the inner end of the adjusting screw 132 abuts against the top of the planar light-combining glass 300, the top position of the planar light-combining glass 300 changes, and the tilt angle of the planar light-combining glass 300 changes, thereby allowing for fine adjustment of the imaging position and sharpness of the virtual image.

[0037] 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 inner end of the adjusting screw 132 abuts in the positioning hole 311, so that the inner end of the adjusting screw 132 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.

[0038] 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 inner side wall of 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 131, so that the top of the outer frame 310 will not disengage from the adjusting screw 132.

[0039] Furthermore, the bottom of the fixed frame 131 (corresponding to the lower edge of the planar light-combining glass, 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 adjusting screw 132, 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.

[0040] 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 with a large field of view, characterized in that, The device includes a housing and a display. The housing has an inner cavity, and the top of the housing has a mounting position that communicates with the inner cavity. The display is mounted in the mounting position, and the light-emitting surface of the display faces the inner cavity. The housing has an inclined surface arranged at an angle, the inclined surface has an inclined mounting position that communicates with the inner cavity, and a planar light-combining glass is provided on the inclined mounting position; A curved reflector is provided in the inner cavity, and the reflecting surface of the curved reflector is arranged facing the planar light-combining glass; 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 with a large field of view as described in claim 1, characterized in that, The curved reflector is a concave mirror.

3. The virtual image display device with a large field of view 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 with a large field of view as described in claim 3, characterized in that, Both sides of the housing are provided with support legs. Each support leg includes a first support leg connected to the housing. The first support leg is inclined toward the inclined surface. A second support leg is sleeved in the middle of the first support leg. The second support leg is arranged in a cross shape with the first support leg.

5. The virtual image display device with a large field of view as described in claim 4, characterized in that, The top of the first leg is hinged to the side of the housing. The upper part of the first leg is provided with a through hole. The side is provided with a plurality of screw holes arranged in an arc shape. A screw rod is inserted into the through hole and the screw rod is threadedly connected to the screw hole.

6. A virtual image display device with a large field of view as described in any one of claims 1-5, characterized in that, The top of the curved reflector is provided with multiple fixing blocks, each fixing 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.

7. The virtual image display device with a large field of view as described in claim 6, 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.

8. A virtual image display device with a large field of view as described in any one of claims 1-5, characterized in that, The inclined mounting position includes a fixed frame and a through hole that communicates with the inner cavity. The top of the fixed frame is provided with an adjusting screw hole, and an adjusting screw is provided in the adjusting screw hole. The inner end of the adjusting screw abuts against the top of the planar light-combining glass.

9. A virtual image display device with a large field of view as described in claim 8, characterized in that, The planar light-combining glass has an outer frame on its outer side, and a positioning hole is provided at the top of the outer frame. The inner end of the adjusting screw abuts in the positioning hole.

10. A virtual image display device with a large field of view as described in claim 9, characterized in that, The outer frame is also provided with a return spring, one end of which is connected to the outer frame and the other end is connected to the inner wall of the housing.

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