High-performance large-FOV optical display system and wearable device

Abstract

The utility model provides a high-performance large FOV optical display system and a wearable device, belonging to the technical field of optical imaging, the optical display system comprises a display unit, and a first transmitting mirror, a first optical element, a second transmitting mirror and a first reflecting mirror which are sequentially arranged on a light emitting path of the display unit, and also comprises a second reflecting mirror, the second reflecting mirror is arranged on a reflected light path of the first optical element, the second reflecting mirror and the first reflecting mirror are located on the same side of the first optical element, and light reflected by the second reflecting mirror enters human eyes; the included angle between the light reflected by the first optical element and entering the second reflector and the optical axis of the second reflector is 0-70 degrees. The imaging quality is good, the field angle is large, and the user experience is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of optical imaging, and specifically relates to a high-performance large FOV optical display system and a wearable device. Background Art

[0002] Augmented Reality (AR) is a technology that combines optical devices with computer technology to overlay the real world with the virtual world. This technology allows users to interact with both the real world and the virtual world at the same time, giving users a new interactive experience. The penetrating optical display system is one of the core technologies in the field of augmented reality. Currently, wearable devices using augmented display technology have been widely used in games, retail, education, industry, and medical fields.

[0003] At present, penetrating optical display technology can be divided into geometric optics solutions: Birdbath, ordinary reflective prism, free-form surface prism and other solutions and diffraction optics-based array optical waveguide, diffraction optical waveguide and other solutions. Among them, the idea of ​​geometric optics is mature in technology, convenient in device processing, and small in assembly tolerance compared to the diffraction solution. However, this type of solution is limited by the light source device and the overall size, weight, and price requirements of the AR system. There are generally problems such as small field of view, performance, and observation distance that cannot be taken into account. These shortcomings reduce the user experience of augmented reality wearable devices. Utility Model Content

[0004] The purpose of the embodiment of the utility model is to provide a high-performance large FOV optical display system with small size, good imaging quality and large field of view angle range.

[0005] Another purpose of the embodiments of the present utility model is to provide a wearable device that is easy to wear, can be adapted to myopic users, and enhances user experience and immersion.

[0006] The implementation mode of the utility model is achieved as follows:

[0007] An embodiment of the utility model provides a high-performance large FOV optical display system, including a display unit and a first transmission mirror, a first optical element, a second transmission mirror and a first reflection mirror which are sequentially arranged on the light output path of the display unit, and also includes a second reflection mirror, which is arranged on the reflected light path of the first optical element and is located on the same side of the first optical element as the first reflection mirror, the light reflected from the second reflection mirror enters the human eye, and the angle formed by the light reflected from the first optical element and the optical axis of the second reflection mirror is 0-70°.

[0008] Optionally, a third transmission mirror is further provided on the optical path between the first optical element and the second reflection mirror.

[0009] Optionally, the distance between the display unit and the first optical element is 0-20 mm.

[0010] Optionally, the distance between the first reflector and the first optical element is 0-20 mm.

[0011] Optionally, the distance between the second reflector and the first optical element is 10 mm-30 mm.

[0012] Optionally, the first optical element includes a first optical lens, a first polarized reflective film, a second polarized reflective film, a phase delay film and an anti-reflection film;

[0013] The first polarizing reflective film is arranged on a side of the first optical lens close to the display unit, the second polarizing reflective film is arranged on a side of the first optical lens away from the display unit, the phase delay film is arranged on a side of the second polarizing reflective film away from the first optical lens, and the number of anti-reflection films is two and they are respectively arranged on a side of the first polarizing reflective film away from the first optical lens and a side of the phase delay film away from the first optical lens.

[0014] An embodiment of the utility model further provides a wearable device, comprising a wearable component and the above-mentioned high-performance large FOV optical display system, wherein the optical display system is arranged on the wearable component.

[0015] The beneficial effects of the utility model are:

[0016] The high-performance large FOV optical display system provided by the embodiment of the utility model has good imaging quality and a large field of view angle that can reach more than 70°, which greatly improves the user experience.

[0017] The wearable device provided by the embodiment of the utility model has a simple production process, low cost, and is easy to wear, which greatly improves the wearing experience of the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the optical architecture of a high-performance large FOV optical display system according to the first embodiment of the present utility model;

[0019] In the figure: 1-display unit; 2-first transmission mirror; 3-first optical element; 31-first optical lens; 32-first polarizing reflection film; 33-second polarizing reflection film; 34-phase delay film; 35-anti-reflection film; 4-second transmission mirror; 5-first reflection mirror; 6-second reflection mirror; 7-third transmission mirror. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0021] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features thereof may be combined with each other.

[0022] In the description of the present invention, it should be noted that the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance. Example 1

[0023] refer to Figure 1 As shown, the first embodiment of the utility model provides a high-performance large FOV optical display system, including a display unit 1, a first transmission mirror 2, a first optical element 3, a second transmission mirror 4, a first reflection mirror 5, and a second reflection mirror 6.

[0024] The display unit 1 mainly plays the role of emitting light. The display unit 1 can display 2D or 3D images or videos, etc. The display unit 1 can adopt an OLED display, an LCD display, an LCOS display, a micro-LED display or a mini-LED display, etc.

[0025] The first transmission mirror 2 is arranged on the light path of the display unit 1. The first transmission mirror 2 is used to control the light, improve image quality parameters such as image distortion and resolution, and reduce the system volume. The number of the first transmission mirror 2 can be only one, or two or more.

[0026] The first transmission mirror 2 can be made of plastic or glass. The two side surfaces of the first transmission mirror 2 can be processed into spherical surfaces, aspherical surfaces, free-form surfaces or Fresnel surfaces.

[0027] The first optical element 3 is arranged on the optical path of the transmitted light of the first transmission mirror 2, and the angle formed by the optical axis of the first optical element 3 and the optical axis of the first transmission mirror 2 is 20°-70°, preferably 45°.

[0028] The first optical element 3 includes a first optical lens 31, a first polarizing reflective film 32, a second polarizing reflective film 33, a phase delay film 34 and an anti-reflection film 35. The first polarizing reflective film 32 is arranged on a side of the first optical lens 31 close to the display unit 1, the second polarizing reflective film 33 is arranged on a side of the first optical lens 31 away from the display unit 1, the phase delay film 34 is arranged on a side of the second polarizing reflective film 33 away from the first optical lens 31, and the number of anti-reflection films 35 is two and they are arranged on a side of the first polarizing reflective film 32 away from the first optical lens 31 and a side of the phase delay film 34 away from the first optical lens 31, respectively.

[0029] The distance between the display unit and the first optical element is 0-20 mm.

[0030] The second transmission mirror 4 is arranged on the transmission light path of the first optical element 3, and the first reflection mirror 5 is arranged on the transmission light path of the second transmission mirror 4. The second transmission mirror 4 is used to control the light and improve image quality parameters such as image distortion and resolution. The first reflection mirror 5 is used to reflect the light.

[0031] The distance between the first reflector and the first optical element is 0-20 mm.

[0032] The second reflector 6 is arranged on the reflected light path of the first optical element and is located on the same side of the first optical element as the first reflector. The light reflected from the second reflector 6 enters the human eye. The angle formed by the light reflected from the first optical element and entering the second reflector 6 and the optical axis of the second reflector 6 is 0-70°. The spacing between the second reflector 6 and the first optical element is 10mm-30mm.

[0033] A third transmission mirror 7 may also be provided on the optical path between the first optical element 3 and the second reflector 6. The third transmission mirror 7 is used to control the light and improve image quality parameters such as image distortion and resolution.

[0034] The imaging principle of the optical display system of this embodiment is as follows:

[0035] The light emitted by the display unit 1 is first processed by the first transmission mirror 2 and then transmitted, and then enters the first optical element 3, and then is transmitted out and enters the second transmission mirror 4 after being processed by the first optical element 3, and then is transmitted out from the second transmission mirror 4 and enters the first reflection mirror 5, where the light is reflected, and then enters the second transmission mirror 4 again for processing and then is transmitted out, and then enters the first optical element 3 again for processing and then is reflected, and the light reflected from the first optical element 3 enters the third transmission mirror 7, and the light transmitted from the third transmission mirror 7 enters the second reflection mirror 6, and then is reflected into the human eye to form a virtual image of a specific magnification. Example 2

[0036] A second embodiment of the present invention provides a wearable device, including a wearable component and an optical display system.

[0037] It should be noted that the optical display system in this embodiment can adopt the optical display system in Example 1. Its structure, working principle and technical effects produced refer to the corresponding contents in Example 1 and are not described in detail here.

[0038] The optical display system is set on the wearable component. The wearable component can be a helmet or a glasses frame, etc., which is convenient for people to wear on their heads. Of course, the head-mounted display device also includes a control unit, a storage unit, etc. The control unit is used to control the device, and the storage unit is used to store images, videos, etc.

[0039] It should be noted that the present application does not limit the application of the optical display system to a head-mounted display device. The system can also be applied to other devices. In one possible application scenario, it can also be integrated with a desktop-level optical display device and a vehicle-mounted optical display device. The virtual image distance is farther, which can realize the eye protection function and enhance the viewing experience.

[0040] The utility model is not limited to the above optional implementation modes, and anyone can derive other various forms of products under the enlightenment of the utility model. The above specific implementation modes should not be understood as limiting the protection scope of the utility model. The protection scope of the utility model shall be based on the definition in the claims, and the description can be used to interpret the claims.

Claims

1. A high-performance large FOV optical display system, characterized by: The invention comprises a display unit and a first transmission mirror, a first optical element, a second transmission mirror and a first reflection mirror which are sequentially arranged on the light output path of the display unit, and a second reflection mirror which is arranged on the light reflected path of the first optical element and is located on the same side of the first optical element as the first reflection mirror, the light reflected from the second reflection mirror enters the human eye, and the angle formed by the light reflected from the first optical element and the optical axis of the second reflection mirror is 0-70°.

2. The high performance large FOV optical display system according to claim 1, characterized in that: A third transmission mirror is also provided on the optical path between the first optical element and the second reflection mirror.

3. The high performance large FOV optical display system according to claim 1, characterized in that: The distance between the display unit and the first optical element is 0-20 mm.

4. The high performance large FOV optical display system according to claim 1, characterized in that: The distance between the first reflector and the first optical element is 0-20 mm.

5. The high performance large FOV optical display system according to claim 1, characterized in that: The distance between the second reflector and the first optical element is 10 mm-30 mm.

6. The high performance large FOV optical display system according to claim 1, characterized in that: The first optical element includes a first optical lens, a first polarizing reflective film, a second polarizing reflective film, a phase delay film and an anti-reflection film; The first polarizing reflective film is arranged on a side of the first optical lens close to the display unit, the second polarizing reflective film is arranged on a side of the first optical lens away from the display unit, the phase delay film is arranged on a side of the second polarizing reflective film away from the first optical lens, and the number of anti-reflection films is two and they are respectively arranged on a side of the first polarizing reflective film away from the first optical lens and a side of the phase delay film away from the first optical lens.

7. A wearable device, characterized in that: It comprises a wearable component and a high-performance large FOV optical display system as described in any one of claims 1 to 6, wherein the optical display system is arranged on the wearable component.

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