VR glasses light machine and VR equipment

Abstract

The utility model provides VR equipment and a VR glasses light machine, and the VR glasses light machine comprises a frame. The frame is provided with a display screen and photochromic glass for light rays emitted by the display screen to pass through; and a light path folding film is attached to the incident surface and / or the emergent surface of the photochromic glass. The photochromic glass is used for adjusting the light intensity, so that the light intensity is kept in a proper range, and the probability of eye diseases caused by too strong light is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of VR devices, in particular to a VR glasses optical engine and a VR device. Background Art

[0002] With the continuous popularity of the metaverse concept, VR devices are regarded as the "key to the metaverse" due to their interactivity, and have long attracted major enterprises to increase their investment. VR glasses have become the mainstream research and development object in the market. The application of the Pancake optical solution can bring a "qualitative" leap in the picture clarity and product thinness of VR. The Pancake optical solution generally includes a display screen, an optical path folding film, and lenses. The optical path folding film is arranged between the display screen and the lenses. The light emitted by the display screen passes through the optical path folding film and then passes through the lenses to reach the human eye. The Pancake optical solution uses an optical path folding film to replace the traditional lens array to refract light, greatly reducing the volume and weight of the VR device.

[0003] However, the light emitted by the light screen of the VR device will have strong and weak changes. When an ordinary person's eyes are irradiated by strong light, the eyes will have photophobia and discomfort. This symptom is called photophobia. The normal reaction is to narrow the eyes or use other items to help isolate the sunlight to reduce the discomfort of the eyes. The most common cause of eye photophobia is the inflammatory reaction in the front end of the eyes, including: conjunctivitis, keratitis, corneal foreign body, corneal abrasion, corneal ulcer, iritis, and iridocyclitis, etc.

[0004] Based on the above reasons, it is necessary to provide a technical solution that can reduce the probability of eye diseases caused by strong light in VR devices. Summary of the Utility Model

[0005] The utility model provides a VR glasses optical engine and a VR device, which can adjust the light intensity, thereby reducing the probability of eye diseases caused by VR devices.

[0006] The technical solution adopted by the utility model is as follows:

[0007] A VR glasses optical engine includes a frame; a display screen is arranged on the frame, and a color-changing glass through which the light emitted by the display screen passes is provided; an optical path folding film is attached to the incident surface and / or the exit surface of the color-changing glass.

[0008] In one embodiment, the color-changing glass is a photochromic glass.

[0009] In one embodiment, the VR glasses optical engine further includes a color-changing control unit. The color-changing glass is an electrochromic glass, and the electrochromic glass is electrically connected to the color-changing control unit, and the electrochromic glass is controlled to change color by the color-changing control unit.

[0010] In one embodiment, the electrochromic glass is gasochromic glass.

[0011] In one embodiment, the frame includes a lens bracket, a display screen bracket, and an optical engine rear cover arranged in sequence from top to bottom; the electrochromic glass is fixedly connected to the lens bracket; the display screen bracket is fixedly connected to the lens bracket and the optical engine rear cover; the display screen is fixedly connected to the display screen bracket.

[0012] In one embodiment, the display screen is located on the side of the display screen bracket facing away from the lens bracket.

[0013] In one embodiment, a groove is provided on the side of the display screen bracket facing the lens bracket; the electrochromic glass is located outside the groove, so as to form an optical path space between the electrochromic glass and the display screen bracket along the depth direction of the groove.

[0014] In one embodiment, first connection parts are provided on both sides of the display screen bracket, and second connection parts are provided at positions corresponding to the first connection parts on both sides of the optical engine rear cover, and the first connection parts and the second connection parts are detachably connected.

[0015] In one embodiment, the lens bracket is provided with a lens through which the light emitted by the display screen can pass; the lens is located on the side of the electrochromic glass facing away from the display screen.

[0016] A VR device includes a main control unit and two VR glasses optical engines as described above; the two VR glasses optical engines are electrically connected to the main control unit, and the main control unit controls the operation of the two VR glasses optical engines.

[0017] The beneficial effects of the present utility model are:

[0018] This application is provided with electrochromic glass, and the electrochromic glass is used to adjust the light intensity so that the light intensity is maintained within an appropriate range, thereby reducing the probability of eye diseases caused by too strong light; in addition, the optical path of this application is folded and attached to the electrochromic glass to refract light, and the structural compactness is relatively high, which is beneficial to reducing the volume of the VR glasses optical engine. Description of the Drawings

[0019] The drawings are used to provide a further understanding of the present utility model and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present utility model, but should not constitute a limitation to the present utility model. In the drawings,

[0020] Figure 1 is a schematic structural diagram of the VR glasses optical engine according to an embodiment of the present utility model;

[0021] Figure 2 is a schematic structural diagram of the VR glasses optical engine according to an embodiment of the present utility model.

[0022] Explanation of the Reference Numerals in the Drawings:

[0023] 10. Frame; 11. Lens holder; 12. Display screen holder; 121. Groove; 13. Rear cover of optical engine

[0024] 20. Variable color glass; 21. Optical path folding film

[0025] 30. Display screen

[0026] 40. Lens Specific embodiments

[0027] The following will describe in detail the specific embodiments of the present utility model with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for the purpose of illustrating and explaining the present utility model, and are not used to limit the present utility model.

[0028] This embodiment discloses a VR device (not shown in the figure), which can be a head-mounted device. It includes a main control unit and two VR glasses optical engines. When the user wears the VR device, the two glasses optical engines correspond to the user's two eyes. The two VR glasses optical engines are electrically connected to the main control unit, and the main control unit controls the operation of the two VR glasses optical engines. Among them, the main control unit can adopt a commonly used control module in the industry. Since it is prior art, the structural principle of the main control unit and the connection manner between the main control unit and the two VR glasses optical engines will not be described in detail herein, as long as it can control the operation of the VR glasses optical engines.

[0029] Please refer to Figure 1 and Figure 2 , in this embodiment, the VR glasses optical engine includes a frame 10. A display screen 30 and variable color glass 20 for allowing the light emitted by the display screen 30 to pass through are provided on the frame 10. The bottom surface of the variable color glass 20 is the incident surface, and the top surface of the variable color glass 20 is the exit surface. During operation, the light emitted by the display screen 30 passes through the variable color glass 20 from bottom to top. An optical path folding film 21 is attached to the exit surface of the variable color glass 20. Of course, in other embodiments, the optical path folding film 21 can be attached to the incident surface of the variable color glass 20; or optical path folding films 21 are attached to both the incident surface and the exit surface of the variable color glass 20.

[0030] Compared with the prior art, in this embodiment, the variable color glass 20 is used to adjust the light intensity to keep the light intensity within an appropriate range, thereby reducing the probability of eye diseases caused by too strong light; in addition, the optical path folding film 21 in this embodiment is attached to the variable color glass 20 to refract light, and the structural compactness is relatively high, which is beneficial to reducing the volume of the VR glasses optical engine.

[0031] In this embodiment, the color-changing glass 20 is a photochromic glass. The photochromic glass can automatically change its own light transmittance according to the intensity of light. The principle includes: the photochromic glass is a glass containing silver bromide (or silver chloride) and a trace amount of copper oxide; when irradiated by light, the silver bromide in it decomposes to produce free atoms; silver ions can attract visible light. When the silver ions accumulate to a certain amount, most of the light incident on the photochromic glass is absorbed, and the original colorless and transparent photochromic glass becomes grayish-black, with a low light transmittance; when the color-changed photochromic glass is placed in the dark, under the catalytic action of copper oxide, the silver ions and bromide ions will combine into silver bromide again, and the photochromic glass returns to transparency, and the light transmittance becomes high. The intensity of light can change the concentration of silver ions in the photochromic glass, and the concentration of silver ions determines the degree of color change of the glass, so as to achieve the purpose of adaptive gradient color.

[0032] In this embodiment, the frame 10 includes a lens holder 11, a display screen holder 12, and an optical engine rear cover 13 arranged in sequence from top to bottom; the color-changing glass 20 is fixedly connected to the lens holder 11; the display screen holder 12 is fixedly connected to the lens holder 11 and the optical engine rear cover 13; the display screen 30 is fixedly connected to the display screen holder 12. The two sides of the display screen holder 12 are provided with first connecting parts 122, and the positions of the two sides of the optical engine rear cover 13 corresponding to the first connecting parts 122 are provided with second connecting parts 131, and the first connecting parts 122 and the second connecting parts 131 are detachably connected. Specifically, the lens holder 11 is cylindrical, and the display screen holder 12 is an annular holder. During assembly, first, the color-changing glass 20 is bonded to the bottom end of the lens holder 11 by an adhesive, so that the axis of the lens holder 11 is perpendicular to the color-changing glass 20; then the display screen 30 is bonded to the display screen holder 12 by an adhesive; finally, the display screen holder 12, the lens holder 11, and the optical engine rear cover 13 are fixedly connected by fasteners. The fasteners pass through the second connecting part 131 and the first connecting part 122 and are fixedly connected to the lens holder 11. The assembly process is relatively simple and the structure is relatively compact.

[0033] Furthermore, the lens holder 11 is provided with a lens 40 through which the light emitted by the display screen 30 can pass. The lens 40 is located on the side of the color-changing glass 20 facing away from the display screen 30; specifically, the lens 40 can be a hard lens or a plane mirror. The lens 40 is fixedly connected to the top end of the lens holder 11 by an adhesive, and it can play a role in protecting the internal components of the VR glasses optical engine.

[0034] In this embodiment, the display screen 30 is located on the side of the display screen support 12 facing away from the lens support 11, so as to prevent the lens support 11 from squeezing the display screen 30 and causing damage to the display screen 30. The side of the display screen support 12 facing the lens support 11 is partially recessed to form an annular groove 121, and the color-changing glass 20 is located outside the groove 121. The bottom surface of the color-changing glass 20 abuts against the side of the display screen support 12 facing the lens support 11 and seals the top notch of the groove 121, so that an optical path space is formed between the bottom surface of the color-changing glass 20 and the bottom surface of the groove 121. In this way, the depth of the groove 121 can be used to form an optical path space between the color-changing glass 20 and the display screen support 12.

[0035] In other embodiments, the VR glasses optical machine further includes a color change control unit, the color change glass 20 is an electrochromic glass, the electrochromic glass is electrically connected to the color change control unit, and the color change of the electrochromic glass is controlled by the color change control unit. Specifically, a conductive portion is provided on the edge of the electrochromic glass, and a conductive end is provided at the bottom end of the lens holder 11. When the electrochromic glass is fixed to the lens holder 11, the conductive portion of the electrochromic glass is electrically connected to the conductive end at the bottom end of the lens holder 11, and the color change control unit is electrically connected to the conductive portion of the electrochromic glass via the lens holder 11.

[0036] The working principle of electrochromic glass includes: electrochromic glass is to add a conductive medium between two layers of glass substrate, and change the color and transparency of the intermediate medium by applying an external electric field or current, thereby changing the color state of the glass. Electrochromic glass is usually composed of a transparent conductive layer, an electrochromic layer, an electrolyte layer, and an ion storage layer. After the voltage is applied to the transparent conductive layer, the ions in the ion storage layer pass through the electrolyte layer and enter the electrochromic layer, and react chemically with the substances in the electrochromic layer, so that the electrochromic glass presents a specific color. The magnitude of the voltage will affect the amount of ions entering the electrochromic layer. By controlling the magnitude of the voltage, the color depth of the electrochromic glass can be adjusted, thereby controlling the transmittance of the electrochromic glass. After power failure or reverse power supply, the ions return to the ion storage layer from the electrochromic layer through the electrolyte layer, and the glass returns to its initial transparent state.

[0037] In other embodiments, the electrochromic glass 20 may also be gasochromic glass. The working principle of gasochromic glass includes: achieved by exposing a gas-sensitive layer to diluted hydrogen or oxygen. The gas color layer is composed of a thin and porous WO3 (tungsten trioxide) film covering platinum or palladium (the film thickness is less than 1um) to enhance the dissociation of hydrogen. Hydrogen exposed in the porous WO3 film will be chemically reduced to darken the glass. When oxygen is introduced, hydrogen will be converted into water and become transparent again. Normally, WO3 is in a transparent state, but when exposed to H2, it is converted to H-WO3, showing a dark blue color. The higher the concentration of hydrogen, the darker the color, with a stronger infrared filtering effect and a higher conversion rate.

[0038] As long as it does not violate the idea of the present utility model, any combination of various different embodiments of the present utility model shall be regarded as the content disclosed in the present utility model; within the scope of the technical concept of the present utility model, various simple modifications of the technical solution and any combination of different embodiments that do not violate the idea of the present utility model shall be within the protection scope of the present utility model.

Claims

1. A VR glasses optical machine, characterized in that: The invention comprises a frame (10); a display screen (30) and a color-changing glass (20) for allowing light emitted by the display screen (30) to pass through are arranged on the frame (10); and a light path folding film (21) is attached to the incident surface and / or the exit surface of the color-changing glass (20).

2. The VR glasses optical machine according to claim 1, characterized in that: The color-changing glass (20) is photochromic glass (20).

3. The VR glasses optical machine according to claim 1, characterized in that: It also includes a color change control unit, the color change glass (20) is an electrochromic glass (20), the electrochromic glass (20) is electrically connected to the color change control unit, and the color change of the electrochromic glass (20) is controlled by the color change control unit.

4. The VR glasses optical machine according to claim 1, characterized in that: The color-changing glass (20) is gas-induced color-changing glass (20).

5. The VR glasses optical machine according to claim 1, characterized in that: The frame (10) comprises a lens support (11), a display screen support (12) and an optical machine back cover (13) which are arranged in sequence from top to bottom; the color-changing glass (20) is fixedly connected to the lens support (11); the display screen support (12) is fixedly connected to the lens support (11) and the optical machine back cover (13); and the display screen (30) is fixedly connected to the display screen support (12).

6. The VR glasses optical machine according to claim 5, characterized in that: The display screen (30) is located on a side of the display screen support (12) facing away from the lens support (11).

7. The VR glasses optical machine according to claim 6, characterized in that: A groove (121) is provided on one side of the display screen support (12) facing the lens support (11); the color-changing glass (20) is located outside the groove (121), so that an optical path space is formed between the color-changing glass (20) and the display screen support (12) along the depth direction of the groove (121).

8. The VR glasses optical machine as claimed in claim 5, characterized in that: The display screen bracket (12) is provided with first connecting parts (122) on both sides, and the optical machine rear cover (13) is provided with second connecting parts (131) at positions corresponding to the first connecting parts (122), and the first connecting parts (122) and the second connecting parts (131) are detachably connected.

9. The VR glasses optical machine according to claim 5, characterized in that: The lens support (11) is provided with a lens (40) through which light emitted by the display screen (30) can pass; the lens (40) is located on a side of the photochromic glass (20) facing away from the display screen (30).

10. A VR device, characterized in that: It comprises a main control unit and two VR glasses optical machines as described in any one of claims 1 to 9; the two VR glasses optical machines are electrically connected to the main control unit, and the main control unit is used to control the operation of the two VR glasses optical machines.

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