Near-eye display device

Abstract

The application discloses a near-eye display device, which comprises a frame, a lens mounted on the frame, and a display module; the display module comprises a first display panel, a second display panel, a first optical assembly, and a second optical assembly; the first display panel is used for displaying a first image, and the first display panel comprises a first light-emitting part which is mounted on the frame; the second display panel is used for displaying a second image, and the second display panel comprises a second light-emitting part which is mounted on the frame; wherein the first image and the second image can be combined into a complete image; the first optical assembly is used for modulating light rays emitted by the first light-emitting part, so that the light rays emitted by the first light-emitting part pass through the lens and enter a human eye; and the second optical assembly is used for modulating light rays emitted by the second light-emitting part, so that the light rays emitted by the second light-emitting part pass through the lens and enter the human eye. Through the above scheme, the light-emitting efficiency can be improved, and the wearing comfort and reliability can be improved.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a near-eye display device. Background Art

[0002] Near-eye display technology is a current research focus, primarily divided into virtual reality (VR) and augmented reality (AR). AR effectively integrates the virtual and real worlds and represents a significant trend in near-eye display technology. Information from the virtual and real worlds enters the human eye through two channels and is then fused together using algorithms. The virtual world information typically uses a display screen as an image source, and then undergoes light modulation through an optical system before entering the human eye.

[0003] The low luminous efficiency of existing AR glasses is currently the biggest bottleneck of this technology. Summary of the Invention

[0004] The main technical problem solved by the present application is to provide a near-eye display device with high luminous efficiency, light weight and high reliability.

[0005] In order to solve the above technical problems, a technical solution adopted in the present application is: providing a near-eye display device, comprising a frame, a lens mounted on the frame and a display module; the display module comprises a first display panel, a second display panel, a first optical component and a second optical component; the first display panel is used to display a first image, the first display panel comprises a first light-emitting portion, and the first light-emitting portion is mounted on the frame; the second display panel is used to display a second image, the second display panel comprises a second light-emitting portion, and the second light-emitting portion is mounted on the frame, wherein the first image and the second image can be combined into a complete image; the first optical component is used to modulate the light emitted by the first light-emitting portion so that the light emitted by the first light-emitting portion passes through the lens and enters the human eye; the second optical component is used to modulate the light emitted by the second light-emitting portion so that the light emitted by the second light-emitting portion passes through the lens and enters the human eye.

[0006] The beneficial effects of the present application are as follows: Different from the prior art, the near-eye display device provided by the present application divides the display panel for providing an image source into a first display panel and a second display panel, and divides the optical component for modulating light to enter the human eye into a first optical component and a second optical component. The first image displayed by the first display panel is modulated by the first optical component and enters the human eye, and the second image displayed by the second display panel is modulated by the second optical component and enters the human eye. The first image and the second image are combined after modulation and can enter the human eye as a complete image. Since the display panel and the optical component are both divided into two, the length of the transmission path of the light in the display panel and the optical component is shortened, and the loss of brightness of the light during transmission is reduced; at the same time, since the optical component is divided into two parts, the light emitting area of ​​each optical component of the present application is reduced compared with the related art, the luminous flux at each exit pupil position is increased, and the light emitting efficiency is improved; in addition, since the display panel is divided into two parts and the light emitting portion of the display panel is located on the frame, the first display panel and the second display panel generate heat separately, and the weight is dispersed, thereby improving wearing comfort and the reliability of the display device. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 1 is a schematic structural diagram of an embodiment of a near-eye display device of the present application;

[0008] Figure 2 yes Figure 1 Cross-sectional view in the AA direction;

[0009] Figure 3 1 is a schematic diagram of a partial structure of an embodiment of a near-eye display device of the present application;

[0010] Figure 4 It is a partial structural diagram of an embodiment of the near-eye display device of the present application. DETAILED DESCRIPTION

[0011] To make the objectives, technical solutions, and effects of this application more clear and explicit, the present application is further described in detail below with reference to the accompanying drawings and examples. Obviously, the described examples are only some of the examples of this application, not all of them. Based on the examples in this application, all other examples obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0012] See Figure 1 and Figure 2 The near-eye display device 100 includes a frame 10, a lens 20 mounted on the frame 10, and a display module 30. Specifically, the frame 10 is used to mount the lens 20. Figure 1As shown, the frame 10 may include a first frame 11 and a second frame 12 connected together, and the lens 20 may include a first lens 21 and a second lens 22. The first frame 11 and the second frame 12 are used to mount the first lens 21 and the second lens 22, respectively, corresponding to the left eye and the right eye, respectively. In other embodiments, the frame 10 may be an integrated structure, and the lens 20 within the frame 10 may also be an integrated structure, corresponding to both eyes.

[0013] The display module 30 includes a first display panel 31, a second display panel 32, a first optical component 33, and a second optical component 34. The first display panel 31 is used to display a first image. The first display panel 31 includes a first light-emitting portion 311, which is mounted on the frame 10. The second display panel 32 is used to display a second image. The second display panel 32 includes a second light-emitting portion 321, which is mounted on the frame 10. The first image and the second image can be combined into a complete image. Specifically, the first light-emitting portion 311 and the second light-emitting portion 321 are light-emitting devices, which can be OLEDs (organic light-emitting diodes), Micro-LEDs (micro light-emitting diodes), etc. The information of the virtual world is transmitted through the first light-emitting portion 311 and the second light-emitting portion 321 as light sources. The first light-emitting portion 311 and the second light-emitting portion 321 respectively emit light corresponding to the first image and the second image. For example, the first light-emitting portion 311 and the second light-emitting portion 321 can emit light corresponding to the upper and lower halves of the complete image. The first optical component 33 is used to modulate the light emitted by the first light-emitting unit 311, allowing it to pass through the lens 20 and enter the human eye. The second optical component 34 is used to modulate the light emitted by the second light-emitting unit 321, allowing it to pass through the lens 20 and enter the human eye. The first image and the second image are transmitted and modulated within the first optical component 33 and the second optical component 34, respectively, and then combined. Finally, they pass through the lens 20 and enter the human eye, forming a complete image.

[0014] The near-eye display device provided in the present application divides the display panel used to provide an image source into a first display panel 31 and a second display panel 32, and divides the optical component used to modulate light to allow it to enter the human eye into a first optical component 33 and a second optical component 34. The first image displayed by the first display panel 31 is transmitted and modulated in the first optical component 33 and then enters the human eye. The second image displayed by the second display panel 32 is transmitted and modulated in the second optical component 34 and then enters the human eye. The first image and the second image are combined after modulation and can enter the human eye as a complete image. Since the display panel and the optical component are divided into two, the length of the light transmission path in the display panel and the optical component is shortened, the brightness loss of the light during transmission is reduced, and the brightness entering the eye is improved; since the optical component is divided into two parts, under the premise that the total light-emitting area remains unchanged, the light-emitting area of ​​each optical component of the present application is reduced, the luminous flux of each output position is increased, the light-emitting efficiency is improved, and the brightness entering the eye is guaranteed; since the display panel is divided into two parts, the first display panel 31 and the second display panel 32 generate heat separately, which disperses the heat, thereby improving the reliability of the display device. At the same time, the weight of the display panel is dispersed, improving wearing comfort and the reliability of the display device; in addition, since the light-emitting part of the display panel is located on the frame 10 and separated from the lens 20, the weight of the lens 20 is avoided from being too concentrated, thereby improving wearing comfort. At the same time, the position of the light-emitting part avoids blocking the lens 20, so that information from the real world outside the near-eye display device 100 can enter the human eye unimpeded.

[0015] Optionally, see Figure 3 and combined Figure 2 The first light emitting portion 311 and the second light emitting portion 321 are arranged along the periphery of the lens 20, and the first light emitting portion 311 and the second light emitting portion 321 are respectively located on two opposite sides of the lens 20. Figure 3 The lens 20 includes a first surface 201 and a second surface 202 opposite to each other in the Y direction. The first light-emitting portion 311 and the second light-emitting portion 321 are respectively arranged on the first surface 201 and the second surface 202 of the lens 20, that is, respectively located at the upper and lower parts of the lens 20. In this embodiment, the first light-emitting portion 311 and the second light-emitting portion 321 are respectively located at the center of the first surface 201 and the second surface 202 in the X direction, which can disperse weight and heat while keeping the center of gravity in the center of the frame 10.

[0016] In other embodiments, the first light-emitting portion 311 and the second light-emitting portion 321 may be arranged side by side on the first surface 201 or on the second surface 202. The first light-emitting portion 311 and the second light-emitting portion 321 may also be arranged on opposite sides in the X direction, or arranged side by side on one side, which is not limited in this application.

[0017] Further, see Figure 2 The first light-emitting portion 311 and the second light-emitting portion 321 are symmetrically arranged about the symmetry plane C of the lens 20, and the first optical component 33 and the second optical component 34 are symmetrically arranged about the symmetry plane C of the lens 20, wherein the symmetry plane C of the lens 20 is parallel to the thickness direction of the lens 20 (the Z direction in the figure). Since the light-emitting portion and the optical component are symmetrically arranged about the symmetry plane C, the weight distribution of the near-eye display device 100 of the present application is symmetrically arranged about the symmetry plane C, making the overall weight distribution more uniform and improving wearing comfort; the images emitted from the first optical component 33 and the second optical component 34 are of the same size and symmetrical about the symmetry plane C, so that the light efficiency loss of the images is the same, the brightness of the two images is consistent, the imaging is unified, and the image quality is guaranteed. In other embodiments, the sizes of the images emitted from the first optical component 33 and the second optical component 34 can be different, for example, they can occupy 40% and 60% of the entire image respectively, and can be combined into a complete image.

[0018] Furthermore, the first display panel 31 and the second display panel 32 have the same structure, and the first optical assembly 33 and the second optical assembly 34 have the same structure. All display panels and optical assemblies in the near-eye display device 100 have a unified structure, which improves production efficiency and saves costs.

[0019] Specifically, see Figure 2 The first optical component 33 includes: a first optical waveguide 333, a first coupling-in grating 332, and a first coupling-out grating 334. The first optical waveguide 333 is stacked with the lens. The first coupling-in grating 332 and the first coupling-out grating 334 are both located on the side of the first optical waveguide 333 facing away from the lens. The first coupling-in grating 332 is located on the light-emitting side of the first light-emitting portion 311, and the first coupling-out grating 334 is located opposite the lens 20. Optionally, the second optical component 34 includes: a second optical waveguide 343, a second coupling-in grating 342, and a second coupling-out grating 344. The second optical waveguide 343 is stacked with the lens. The second coupling-in grating 342 and the second coupling-out grating 344 are both located on the side of the second optical waveguide 343 facing away from the lens 20. The second coupling-in grating 342 is located on the light-emitting side of the second light-emitting portion 321, and the second coupling-out grating 344 is located opposite the lens 20.

[0020] The traveling direction of the light emitted from the first display panel 31 and the second display panel 32 is as follows: Figure 2As shown by the middle arrow, the light first enters the first coupling grating 332 and the second coupling grating 342. The first coupling grating 332 and the second coupling grating 342 are used to change the direction of the light so that it enters the first optical waveguide 333 and the second optical waveguide 343 at a larger incident angle, so that the light can be totally reflected in the first optical waveguide 333 and the second optical waveguide 343 without being transmitted out. Part of the light first reaches the first coupling grating 334 and the second coupling grating 344. The first coupling grating 334 and the second coupling grating 344 are also used to change the direction of the light so that it is emitted from the second coupling grating 344 at an angle perpendicular to the lens 20, so that the light can reach the side of the lens 20 away from the first optical component 33 and the second optical component 34 and reach the front of the human eye. Another part of the light undergoes multiple total reflections in the first optical waveguide 333 and the second optical waveguide 343, and then reaches the first coupling grating 334 and the second coupling grating 344, and finally reaches the front of the human eye, until all the light is reflected out of the optical waveguide and enters the human eye. The first optical component 33 and the second optical component 34 replicate the exit pupil light multiple times along the first direction (the Y direction in the figure). Each exit pupil light outputs the same image, so that the eye can see the image when moving horizontally, achieving pupil expansion. However, because the area of ​​the outcoupling grating is larger than the area of ​​the incoupling grating, the luminous flux at each exit pupil position is reduced, reducing the light efficiency. In the present application, the outcoupling grating is divided into two. The area of ​​the first outcoupling grating 334 and the second outcoupling grating 344 is half of the total area of ​​the outcoupling grating, and each has an independent image source, which reduces the reduction in the luminous flux of each outcoupling grating. When the areas of the first outcoupling grating 334 and the second outcoupling grating 344 are the same, the luminous flux at each exit pupil position is twice that of the prior art. At the same time, because the present application also divides the optical waveguide into two, the light enters the human eye through the first optical waveguide 333 and the second optical waveguide 343 respectively. Therefore, the propagation path of the light is shortened, the loss of light during propagation is reduced, and the light efficiency is further improved.

[0021] Optionally, in this embodiment, the first outcoupling grating 334 and the second outcoupling grating 344 are arranged in contact with each other. Since the two are seamlessly connected, the first image and the second image can also be seamlessly connected after being emitted from the first outcoupling grating 334 and the second outcoupling grating 344, respectively, thereby improving the display effect and imaging quality. In other embodiments, the first outcoupling grating 334 and the second outcoupling grating 344 can be arranged at intervals. Furthermore, the first optical waveguide 333 and the second optical waveguide 343 are integrally formed and can be arranged as a whole on one side of the lens 20 to ensure imaging consistency.

[0022] Optionally, continue to Figure 2 and combined Figure 4, the first optical component 33 also includes a first collimating lens 331, which is located between the first coupling grating 332 and the first light-emitting portion 311, and is used to collimate the light emitted by the first light-emitting portion 311 into the first coupling grating 332. Specifically, the first collimating lens 331 can be a super lens, and the light rays passing through the first collimating lens 331 are parallel to each other and vertically incident on the first coupling grating 332, so as to facilitate the subsequent uniform change of the light angle by the first coupling grating 332. Similarly, the second optical component 34 also includes a second collimating lens 341, which is located between the second coupling grating 342 and the second light-emitting portion 321, and is used to collimate the light emitted by the second light-emitting portion 321 into the second coupling grating 342. As shown Figure 4 As shown by the arrows, the light rays passing through the second collimating lens 341 are parallel to each other and vertically incident on the second coupling grating 342 .

[0023] Optionally, continue to Figure 2 and combined Figure 4 The first display panel 31 further includes a first microlens 313, which is located on the light-emitting side of the first light-emitting portion 311; the second display panel 32 further includes a second microlens 323, which is located on the light-emitting side of the second light-emitting portion 321. Figure 4 As shown by the arrows, the first microlens 313 and the second microlens 323 are used to converge light, so that the light passing through the microlens is concentrated in the direct direction (Z direction in the figure) and its vicinity, thereby improving the luminous brightness of the first light-emitting portion 311 and the second light-emitting portion 321 in the direct direction. Furthermore, the first light-emitting portion 311 and the second light-emitting portion 321 each include a plurality of light-emitting units, and the microlenses correspond to the light-emitting units one by one. Figure 4 As shown, after being focused by the microlens, more light can be collimated by the collimating lens, improving the utilization rate of light and thus increasing the luminous brightness.

[0024] Optionally, continue to Figure 2 The first optical assembly 33 further includes a first light-blocking member 335, which is located on the side of the first coupling grating 332 facing away from the first light-emitting portion 311. The second optical assembly 34 further includes a second light-blocking member 345, which is located on the side of the second coupling grating 342 facing away from the second light-emitting portion 321. The first and second light-blocking members 335, 345 prevent light from leaking out, thereby improving luminous efficiency. The first and second light-blocking members 335, 345 can be disposed within the frame 10, which can achieve light shielding while securing the lens 20 and the display module 30.

[0025] Optionally, continue to Figure 2 and combined Figure 1The first display panel 31 further includes a first driving backplane 312, which includes a first pixel circuit backplane, a first timing circuit backplane, and a first logic circuit backplane (not shown) electrically connected to each other, and the first pixel circuit backplane is electrically connected to the first light-emitting portion 311. The second display panel 32 further includes a second driving backplane 322, which includes a second pixel circuit backplane, a second timing circuit backplane, and a second logic circuit backplane (not shown) electrically connected to each other, and the second pixel circuit backplane is electrically connected to the second light-emitting portion. The first pixel circuit backplane is mounted on the frame 10, and the second pixel circuit backplane is mounted on the frame 10. Optionally, the near-eye display device 100 further includes temples 40, which are connected to the frame 10, and the first timing circuit backplane and the first logic circuit backplane are mounted on the temples 40; the second timing circuit backplane and the second logic circuit backplane are mounted on the temples 40. The driving backplane is used to provide a driving circuit for the light-emitting portion, wherein the pixel circuit is used to drive the light-emitting portion to emit light, and the timing circuit and the logic circuit are used to control the pixel circuit. The present application separates the pixel circuit backplane from the timing circuit backplane and the logic circuit backplane, wherein the pixel circuit backplane is installed together with the light-emitting portion in the frame 10, and the timing circuit and the logic circuit are installed together in the temple 40. Since the driving backplane is split into two parts, on the one hand, the heat emitted by the driving backplane is dispersed, thereby improving the reliability of the device; on the other hand, the weight of the display panel is dispersed, and the weight is distributed on the frame 10 and the temple 40, thereby improving the wearing comfort.

[0026] Specifically, mounting grooves can be provided in the frame 10 and the temples 40, respectively, for mounting the pixel circuit backplane, the timing circuit backplane, and the logic circuit backplane, and the mounting grooves at the two positions are interconnected. Optionally, the temples 40 include a first temple 41 and a second temple 42, which are respectively connected to both sides of the frame 10. When the frame 10 is as shown in FIG. Figure 1 As shown, when the first frame 11 and the second frame 12 are included, the first temple 41 is connected to the first frame 11, and the second temple 42 is connected to the second frame 12. Then, the first pixel circuit backplane is installed in the first frame 11, the first timing circuit backplane and the first logic circuit backplane are installed in the first temple 41, the second pixel circuit backplane is installed in the second frame 12, and the second timing circuit backplane and the second logic circuit backplane are installed in the second temple 42. When the frame 10 is an integrated structure, the first pixel circuit backplane and the second pixel circuit backplane are both installed in the frame 10, the first timing circuit backplane and the first logic circuit backplane are installed in the first temple 41, and the second timing circuit backplane and the second logic circuit backplane are installed in the second temple 42. The above arrangement facilitates the connection of various circuits.

[0027] The above is only an implementation method of the present application and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the description and drawings of this application, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A near-eye display device, characterized in that: include: a frame and a lens mounted on the frame; Display module, including: a first display panel, configured to display a first image, wherein the first display panel comprises a first light-emitting portion, and the first light-emitting portion is mounted on the mirror frame; a second display panel for displaying a second image, the second display panel comprising a second light-emitting portion, the second light-emitting portion being mounted on the mirror frame, wherein the first image and the second image can be combined into a complete image; a first optical component, configured to modulate the light emitted by the first light-emitting portion so that the light emitted by the first light-emitting portion passes through the lens and enters the human eye; The second optical component is used to modulate the light emitted by the second light-emitting portion so that the light emitted by the second light-emitting portion passes through the lens and enters the human eye.

2. The near-eye display device according to claim 1, wherein: The first light emitting portion and the second light emitting portion are arranged along the periphery of the lens, and the first light emitting portion and the second light emitting portion are respectively located on two opposite sides of the lens.

3. The near-eye display device according to claim 2, wherein: The first light emitting portion is located at the upper portion of the lens, and the second light emitting portion is located at the lower portion of the lens.

4. The near-eye display device according to claim 1, wherein: The first light-emitting portion and the second light-emitting portion are symmetrically arranged about the symmetric plane of the lens, and the first optical component and the second optical component are symmetrically arranged about the symmetric plane of the lens, wherein the symmetric plane of the lens is parallel to the thickness direction of the lens.

5. The near-eye display device according to claim 1, wherein: The first display panel and the second display panel have the same structure; and / or the first optical component and the second optical component have the same structure.

6. The near-eye display device according to claim 1, wherein: The first optical component includes: a first optical waveguide, a first coupling-in grating and a first coupling-out grating. The first optical waveguide is stacked with the lens. The first coupling-in grating and the first coupling-out grating are both located on the side of the first optical waveguide away from the lens. At the same time, the first coupling-in grating is located on the light-emitting side of the first light-emitting portion, and the first coupling-out grating is arranged opposite to the lens.

7. The near-eye display device according to claim 1, wherein: The second optical component includes: a second optical waveguide, a second coupling-in grating and a second coupling-out grating. The second optical waveguide is stacked with the lens. The second coupling-in grating and the second coupling-out grating are both located on the side of the second optical waveguide away from the lens. At the same time, the second coupling-in grating is located on the light-emitting side of the second light-emitting portion, and the second coupling-out grating is arranged opposite to the lens.

8. The near-eye display device according to claim 6, wherein: The first optical component further includes a first collimating lens located between the first coupling-in grating and the first light-emitting portion, and configured to collimate the light emitted by the first light-emitting portion and emit it into the first coupling-in grating.

9. The near-eye display device according to claim 8, wherein: The first optical component further includes a first light blocking member, which is located on a side of the first coupling-in grating away from the first light-emitting portion.

10. The near-eye display device according to claim 7, wherein: The second optical component further includes a second collimating lens located between the second coupling-in grating and the second light-emitting portion, and configured to collimate the light emitted by the second light-emitting portion and emit it into the second coupling-in grating.

11. The near-eye display device according to claim 10, wherein: The second optical component further includes a second light blocking member, which is located on a side of the second coupling-in grating away from the second light-emitting portion.

12. The near-eye display device according to claim 1, wherein: The first display panel also includes a first driving backplane, which includes a first pixel circuit backplane, a first timing circuit backplane and a first logic circuit backplane electrically connected to each other, and the first pixel circuit backplane is electrically connected to the first light-emitting portion; wherein the first pixel circuit backplane is mounted on the mirror frame.

13. The near-eye display device according to claim 12, wherein: The near-eye display device further includes temples, which are connected to the frame, and the first timing circuit backplane and the first logic circuit backplane are mounted on the temples.

14. The near-eye display device according to claim 12, wherein: The first display panel further includes a first microlens, and the first microlens is located on the light-emitting side of the first light-emitting portion.

15. The near-eye display device according to claim 1, wherein: The second display panel also includes a second driving backplane, which includes a second pixel circuit backplane, a second timing circuit backplane and a second logic circuit backplane electrically connected to each other, and the second pixel circuit backplane is electrically connected to the second light-emitting portion; wherein the second pixel circuit backplane is mounted on the mirror frame.

16. The near-eye display device according to claim 15, wherein: The near-eye display device further includes temples, which are connected to the frame, and the second timing circuit backplane and the second logic circuit backplane are mounted on the temples.

17. The near-eye display device according to claim 15, wherein: The second display panel further includes a second microlens, and the second microlens is located on the light-emitting side of the second light-emitting portion.

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