Near-to-eye display device

Abstract

The invention discloses a near-to-eye display device. The near-to-eye display device comprises a lens frame, lenses mounted on the lens 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, the first display panel comprises a first light-emitting part, and the first light-emitting part is installed on the mirror frame; the second display panel is used for displaying a second image, the second display panel comprises a second light-emitting part, the second light-emitting part is installed on the mirror frame, and the first image and the second image can be combined into a complete image; the first optical assembly is used for modulating light emitted by the first light-emitting part, so that the light emitted by the first light-emitting part penetrates through the lens and enters human eyes; the second optical assembly is used for modulating the light emitted by the second light-emitting part, so that the light emitted by the second light-emitting part penetrates through the lens and enters the human eyes. According to the scheme, the luminous efficiency can be improved, and the wearing comfort and reliability are 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 the focus of current research, which is mainly divided into virtual display technology (Virtual Reality, VR) and augmented reality technology (Augmented Reality, AR). Among them, augmented reality technology can effectively combine the virtual world and the real world, which is the general trend of near-eye display technology. The information of the virtual world and the real world enter the human eye through two channels, and then merged together through relevant algorithms. The information of the virtual world generally uses the display screen as the image source, and then modulates the light through the optical system to enter the human eye.

[0003] The low luminous efficiency of existing AR glasses is currently the biggest bottleneck of the 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 installed 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 unit, and the first light-emitting unit is installed on the frame; the second display panel is used to display a second image, the second display panel comprises a second light-emitting unit, and the second light-emitting unit is installed 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 unit so that the light emitted by the first light-emitting unit 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 unit so that the light emitted by the second light-emitting unit 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 the image source into a first display panel and a second display panel, and divides the optical component for modulating the 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 enters the human eye after being modulated by the first optical component, the second image displayed by the second display panel enters the human eye after being modulated by the second optical component, and the first image and the second image are combined after being modulated, 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 brightness loss of the light during the transmission process 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 of 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 part 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 the wearing comfort and the reliability of the display device. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 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 Sectional view in the AA direction;

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

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

[0011] In order to make the purpose, technical solution and effect of the present application clearer and more specific, the present application is further described in detail with reference to the accompanying drawings and examples. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0012] See also 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 to each other, 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 in 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, and the first display panel 31 includes a first light-emitting unit 311, and the first light-emitting unit 311 is mounted on the frame 10. The second display panel 32 is used to display a second image, and the second display panel 32 includes a second light-emitting unit 321, and the second light-emitting unit 321 is mounted on the frame 10, wherein the first image and the second image can be combined into a complete image. Specifically, the first light-emitting unit 311 and the second light-emitting unit 321 are light-emitting devices, which can be OLED (organic light-emitting diode), Micro-LED (micro light-emitting diode), etc. The information of the virtual world is transmitted through the first light-emitting unit 311 and the second light-emitting unit 321 as light sources, and the first light-emitting unit 311 and the second light-emitting unit 321 respectively emit light corresponding to the first image and the second image, for example, the first light-emitting unit 311 and the second light-emitting unit 321 can emit light corresponding to the upper half and the lower half of the complete image. The first optical component 33 is used to modulate the light emitted by the first light emitting unit 311, so that the light emitted by the first light emitting unit 311 passes through the lens 20 and enters the human eye. The second optical component 34 is used to modulate the light emitted by the second light emitting unit 321, so that the light emitted by the second light emitting unit 321 passes through the lens 20 and enters the human eye. The first image and the second image are combined after being transmitted and modulated in the first optical component 33 and the second optical component 34, respectively, and finally pass through the lens 20 and enter the human eye to form a complete picture.

[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 parts, the length of the light transmission path in the display panel and the optical component is shortened, the brightness loss of the light during the transmission process 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 emitting 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 respectively, and the heat is dispersed, thereby improving the reliability of the display device. At the same time, the weight of the display panel is dispersed, which improves the wearing comfort and the reliability of the display device; in addition, since the light-emitting portion 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 the wearing comfort. At the same time, the position of the light-emitting portion avoids blocking the lens 20, thereby enabling the information of the real world outside the near-eye display device 100 to enter the human eye unimpeded.

[0015] Optionally, see Figure 3 Combined with 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 the 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 may be arranged side by side on the second surface 202. The first light emitting portion 311 and the second light emitting portion 321 may also be arranged on two opposite sides in the X direction, or arranged side by side on one side, which is not limited in the present 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 (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, so that the overall weight distribution is more uniform, and the wearing comfort is improved; the pictures 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 effect loss of the pictures is the same, the brightness of the two pictures is consistent, the imaging is unified, and the picture quality is guaranteed. In other embodiments, the size of the pictures emitted from the first optical component 33 and the second optical component 34 can be different, for example, they can account for 40% and 60% of the overall picture respectively, and can be combined into a complete picture.

[0018] Furthermore, the first display panel 31 has the same structure as the second display panel 32, and the first optical assembly 33 has the same structure as the second optical assembly 34. 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] For more details, see Figure 2 The first optical component 33 includes: a first optical waveguide 333, a first coupling grating 332 and a first coupling grating 334. The first optical waveguide 333 is stacked with the lens. The first coupling grating 332 and the first coupling grating 334 are both located on the side of the first optical waveguide 333 away from the lens. Meanwhile, the first coupling grating 332 is located on the light-emitting side of the first light-emitting portion 311. The first coupling grating 334 is arranged opposite to the lens 20. Optionally, the second optical component 34 includes: a second optical waveguide 343, a second coupling grating 342 and a second coupling grating 344. The second optical waveguide 343 is stacked with the lens. The second coupling grating 342 and the second coupling grating 344 are both located on the side of the second optical waveguide 343 away from the lens 20. Meanwhile, the second coupling grating 342 is located on the light-emitting side of the second light-emitting portion 321. The second coupling grating 344 is arranged opposite to 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 firstly shoots toward 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 shoots out of 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 is totally reflected multiple times 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 make multiple copies of the exit pupil light along the first direction (Y direction in the figure), and each exit pupil light outputs the same image, so that the eye can see the image when moving horizontally, and the pupil is expanded. However, since the area of ​​the out-coupling grating is larger than the area of ​​the in-coupling grating, the light flux at each exit pupil position is reduced, which reduces the light efficiency. In the present application, the out-coupling grating is divided into two, and the area of ​​the first out-coupling grating 334 and the second out-coupling grating 344 is half of the total area of ​​the out-coupling grating and each has an independent image source, which reduces the drop in the light flux of each out-coupling grating. When the areas of the first out-coupling grating 334 and the second out-coupling grating 344 are the same, the light flux at each exit pupil position is twice that of the prior art. At the same time, since 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, thus shortening the propagation path of the light, reducing the loss of the light during propagation, and further improving the light efficiency.

[0021] Optionally, in the present 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, to improve 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 arranged in an integral manner, and the first optical waveguide 333 and the second optical waveguide 343 can be arranged as a whole on one side of the lens 20 to ensure the consistency of imaging.

[0022] Optionally, continue to Figure 2 Combined with 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. 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 Combined with Figure 4 The first display panel 31 further includes a first microlens 313, which is located at 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 at 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 unit 311 and the second light-emitting unit 321 in the direct direction. Furthermore, the first light-emitting unit 311 and the second light-emitting unit 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, thereby improving the utilization rate of light and thus increasing the luminous brightness.

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

[0025] Optionally, continue to Figure 2 Combined with Figure 1The first display panel 31 further includes a first driving backplane 312, the first driving backplane 312 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, the second driving backplane 322 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; wherein 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 a temple 40, the temple 40 is connected to the frame 10, the first timing circuit backplane and the first logic circuit backplane are mounted on the temple 40; the second timing circuit backplane and the second logic circuit backplane are mounted on the temple 40. The driving backplane is used to provide a driving circuit for the light-emitting part, wherein the pixel circuit is used to drive the light-emitting part 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 in the frame 10 together with the light-emitting part, and the timing circuit and the logic circuit are installed in the temple 40 together. 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, and on the other hand, the weight of the display panel is dispersed, and the weight is dispersed on the frame 10 and the temple 40, thereby improving the wearing comfort.

[0026] Specifically, mounting grooves can be respectively provided in the frame 10 and the temples 40, which are respectively used to install 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 the two sides of the frame 10. Figure 1 As shown, when the first mirror frame 11 and the second mirror frame 12 are included, the first temple 41 is connected to the first mirror frame 11, and the second temple 42 is connected to the second mirror frame 12, then the first pixel circuit backplane is installed in the first mirror 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 mirror frame 12, and the second timing circuit backplane and the second logic circuit backplane are installed in the second temple 42. When the mirror frame 10 is an integrated structure, the first pixel circuit backplane and the second pixel circuit backplane are both installed in the mirror 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 are only implementation methods of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, 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, used for displaying 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 unit, the second light emitting unit 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, used for modulating the light emitted by the first light emitting part so that the light emitted by the first light emitting part 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, characterized in that: 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; Preferably, 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.

3. The near-eye display device according to claim 1, characterized in that: The first light-emitting portion and the second light-emitting portion are symmetrically arranged with respect to a symmetric plane of the lens, and the first optical component and the second optical component are symmetrically arranged with respect to a symmetric plane of the lens, wherein the symmetric plane of the lens is parallel to a thickness direction of the lens.

4. The near-eye display device according to claim 1, characterized in that: 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.

5. The near-eye display device according to claim 1, characterized in that: 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 a side of the first optical waveguide away from the lens. Meanwhile, the first coupling-in grating is located on a light-emitting side of the first light-emitting portion, and the first coupling-out grating is arranged opposite to the lens.

6. The near-eye display device according to claim 1, characterized in that: 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. Meanwhile, 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.

7. The near-eye display device according to claim 5, characterized in that: The first optical component further comprises a first collimating lens, which is located between the first coupling grating and the first light-emitting portion and is used for collimating the light emitted by the first light-emitting portion and emitting it into the first coupling grating; Preferably, the first optical component further comprises a first light blocking member, and the first light blocking member is located on a side of the first coupling-in grating away from the first light-emitting portion.

8. The near-eye display device according to claim 6, characterized in that: The second optical component further comprises a second collimating lens, which is located between the second coupling-in grating and the second light-emitting portion and is used for collimating the light emitted by the second light-emitting portion and emitting it into the second coupling-in grating; Preferably, the second optical component further comprises a second light blocking member, and the second light blocking member is located on a side of the second coupling-in grating away from the second light-emitting portion.

9. The near-eye display device according to claim 1, characterized in that: The first display panel further includes a first driving backplane, the first driving backplane includes a first pixel circuit backplane, a first timing circuit backplane and a first logic circuit backplane electrically connected to each other, 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; Preferably, the near-eye display device further comprises temples, wherein the temples are connected to the frame, and the first timing circuit backplane and the first logic circuit backplane are mounted on the temples; Preferably, the first display panel further includes a first microlens, and the first microlens is located at a light emitting side of the first light emitting portion.

10. The near-eye display device according to claim 1, characterized in that: The second display panel further includes a second driving backplane, the second driving backplane 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; Preferably, the near-eye display device further comprises temples, wherein the temples are connected to the frame, and the second timing circuit backplane and the second logic circuit backplane are mounted on the temples; Preferably, the second display panel further includes a second microlens, and the second microlens is located at a light emitting side of the second light emitting portion.

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