Display device and AR equipment
By adopting a misaligned stacked waveguide structure and preset angle incident image beam technology in AR devices, the problems of poor image color uniformity and high processing difficulty in existing AR devices are solved, and high-quality image display is achieved.
Patent Information
- Application Number
- CN202422015993.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-19
- Publication Date
- 2025-05-23
- Estimated Expiration
- 2034-08-19
AI Technical Summary
In existing AR equipment, single-layer color waveguides lead to poor image color uniformity, and multi-layer waveguides require precise alignment, which increases processing difficulty and cost.
The first and second display components are adopted, each including an optical machine and a waveguide. The waveguide is misaligned and laminated, and the coupling area and the coupling area overlap in the lamination direction. The image beam is incident on the coupling area at a preset angle and propagates through the waveguide total reflection. The image beams of the coupling area are compensated for each other to improve image uniformity.
Without increasing cost and implementation difficulty, color uniformity and image quality are improved, ghosting is avoided, and imaging quality is enhanced.
Smart Images
Figure CN222896281U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of optical display technology, and more specifically, to a display device and an AR device. Background Art
[0002] The information fusion method provided by augmented reality (AR) technology combines virtual information with the real world. It simulates computer-generated text, images and other virtual information and applies them to the real world to enhance the perception of the real world. Since augmented reality technology makes the interaction between the virtual world and the real world possible, it has been widely used in AR devices. Common AR devices include AR glasses and car-mounted AR-HUD.
[0003] With the development of AR technology, the demand for light, thin and efficient color display devices is growing. In the prior art, a single-layer color waveguide is used to transmit color images. Due to the different wavelengths, the intensity distribution of the output light of images of different colors will be different, and the color uniformity of the image after superposition is poor. The prior art also uses two different waveguide layers to transmit image light beams of different colors respectively, and each layer is responsible for transmitting images of two colors. However, the coupling overlap part of the coupling area of the two waveguide layers requires very precise alignment, which is a great challenge for processing and is not conducive to the promotion and mass production of products. In addition, different waveguide layers transmit different images, which requires ensuring that light of a specific wavelength is only transmitted through the pre-designed waveguide layer, and it is necessary to avoid crosstalk between light in different waveguide layers. Additional technical means, such as wavelength selection devices, are required to achieve this, which increases the cost and difficulty of device implementation. Utility Model Content
[0004] The purpose of this application is to provide a display device and an AR device that can improve color uniformity and image quality without increasing costs and implementation difficulty.
[0005] On the one hand, an embodiment of the present application provides a display device, including a first display component and a second display component, the first display component includes a first optical machine and a first waveguide arranged on the light-emitting side of the first optical machine, the second display component includes a second optical machine and a second waveguide arranged on the light-emitting side of the second optical machine, the first waveguide and the second waveguide are staggered and stacked, the first waveguide is provided with a first coupling-in region and a first coupling-out region, the second waveguide is provided with a second coupling-in region and a second coupling-out region, the first coupling-out region and the second coupling-out region overlap in a stacking direction to form an overlapping region, and the first optical machine emits a first image light beam having a first field of view angle , the central beam of the first image beam enters the first coupling region at a first preset angle and is coupled into the first waveguide by the first coupling region, and then is coupled out by the first coupling region, the second optical machine emits a second image beam with a second field of view angle, the central beam of the second image beam enters the second coupling region at a second preset angle and is coupled into the second waveguide by the second coupling region, and then is coupled out by the second coupling region, the first preset angle is greater than half of the first field of view angle, the second preset angle is greater than half of the second field of view angle, the first image beam coupled out by the first coupling region and the second image beam coupled out by the second coupling region are combined to form an output image beam.
[0006] As an implementable manner, the first preset angle and the second preset angle have the same magnitude and the same direction.
[0007] As an implementable manner, the first image light beam and the second image light beam carry the same image information.
[0008] As an implementable manner, a first turning region is further provided on the first waveguide, and a second turning region is further provided on the second waveguide, and the first turning region and the second turning region are rotationally symmetric about the center of the overlapping region.
[0009] As an practicable manner, the first coupling region and the first turning region are arranged on the first waveguide along the first direction, the first turning region is trapezoidal, and the section of the first turning region gradually increases away from the first coupling region; the second coupling region and the second turning region are arranged on the second waveguide along the first direction, the second turning region is trapezoidal, and the section of the second turning region gradually increases away from the second coupling region.
[0010] As an implementable manner, the first optical engine is arranged on a side of the first waveguide away from the second waveguide, and the second optical engine is arranged on a side of the second waveguide close to the first waveguide; or, the first optical engine is arranged on a side of the first waveguide close to the second waveguide, and the second optical engine is arranged on a side of the second waveguide close to the first waveguide.
[0011] As an practicable manner, projections of the first outcoupling region and the second outcoupling region in the stacking direction completely overlap.
[0012] As an practicable manner, the first coupling region and the second coupling region are rotationally symmetric about the center of the overlapping region.
[0013] As an implementable manner, the brightness of the first image light beam and the second image light beam are different to improve the color uniformity of the output image light beam.
[0014] Another aspect of an embodiment of the present application provides an AR device, comprising the above-mentioned display device.
[0015] The beneficial effects of the embodiments of the present application include:
[0016] The display device provided by the present application includes a first display component and a second display component, the first display component includes a first optical machine and a first waveguide arranged on the light-emitting side of the first optical machine, the second display component includes a second optical machine and a second waveguide arranged on the light-emitting side of the second optical machine, the first waveguide and the second waveguide are staggered and stacked, the first waveguide is provided with a first coupling-in region and a first coupling-out region, the second waveguide is provided with a second coupling-in region and a second coupling-out region, the first coupling-out region and the second coupling-out region overlap in a stacking direction to form an overlapping region, the first optical machine emits a first image light beam with a first field of view angle, the central light beam of the first image light beam is incident on the first coupling-in region at a first preset angle and is emitted by the first coupling-in region It is coupled into the first waveguide and then coupled out by the first coupling-out region. The second optical machine emits a second image light beam with a second field of view angle. The central light beam of the second image light beam is incident on the second coupling-in region at a second preset angle and coupled into the second waveguide by the second coupling-in region, and coupled out by the second coupling-out region, so that the direction of total reflection propagation in the first waveguide is opposite to the direction of total reflection propagation in the second waveguide, the total reflection propagation directions of the image light beam in the first coupling-out region and the second coupling-out region are opposite, and the first coupling-out region and the second coupling-out region couple light beams in the same direction to form an output image. In this way, in the overlapping region, the intensities of the image light beams in the first waveguide and the second waveguide can compensate each other, thereby improving the uniformity of the output image. In addition, the light emitting direction of the first optical machine has a first preset angle with the first direction, so that the first optical machine is tilted relative to the first direction to form the first preset angle, so that the direction of the central light beam of the image light beam coupled through the first coupling region has a first preset angle with the first direction, thereby avoiding ghosting and improving the imaging quality, and the first preset angle is greater than half of the first field of view angle, so that even at the edge of the field of view angle, the first image light beam can enter the observer's eyes at a higher angle to avoid overlapping with the light beam of the central field of view, thereby improving the imaging quality; similarly, the second optical machine is tilted and the tilt angle is greater than the second field of view angle, which can also improve the imaging quality. Therefore, the display device of the present application can improve color uniformity and image quality without increasing costs and implementation difficulties. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.
[0018] Figure 1 One of the structural schematic diagrams of a display device provided in an embodiment of the present application;
[0019] Figure 2 One of the optical path diagrams of a display device provided in an embodiment of the present application;
[0020] Figure 3 A display diagram of a display device provided in an embodiment of the present application;
[0021] Figure 4 A brightness distribution diagram of a display device provided in an embodiment of the present application;
[0022] Figure 5 A second structural schematic diagram of a display device provided in an embodiment of the present application;
[0023] Figure 6 A second optical path diagram of a display device provided in an embodiment of the present application;
[0024] Figure 7 A third structural schematic diagram of a display device provided in an embodiment of the present application;
[0025] Figure 8 An application scenario diagram of a display device provided in an embodiment of the present application;
[0026] Fig. 9 This is one of the schematic diagrams of the field of view angle of a display device provided in an embodiment of the present application;
[0027] Fig.10 The second schematic diagram of the field of view angle of a display device provided in an embodiment of the present application.
[0028] Icon: 100-display device; 110-first waveguide; 111-first coupling region; 112-first decoupling region; 113-first turning region; 120-second waveguide; 121-second coupling region; 122-second decoupling region; 123-second turning region; 130-first optical machine; 131-first collimating element; 140-second optical machine; 141-second collimating element; 151-overlapping region; 161-output image. DETAILED DESCRIPTION
[0029] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.
[0030] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. 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.
[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.
[0032] In the description of the present application, it should be noted that the terms "center", "vertical", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.
[0033] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0034] The embodiment of the present application provides a display device 100, including a first display component and a second display component, wherein the first display component includes a first optical engine 130 and a first waveguide 110 arranged on the light-emitting side of the first optical engine 130, and the second display component includes a second optical engine 140 and a second waveguide 120 arranged on the light-emitting side of the second optical engine 140, the first waveguide 110 and the second waveguide 120 are staggered and stacked, the first waveguide 110 is provided with a first coupling-in region 111 and a first coupling-out region 112, the second waveguide 120 is provided with a second coupling-in region 121 and a second coupling-out region 122, the first coupling-out region 112 and the second coupling-out region 122 overlap in a stacking direction to form an overlapping region 151, and the first optical engine 130 emits a light having a first visual The first image beam with a field angle, the central beam of the first image beam enters the first coupling area 111 at a first preset angle and is coupled into the first waveguide 110 by the first coupling area 111, and then is coupled out by the first coupling area 112, the second optical machine 140 emits a second image beam with a second field angle, the central beam of the second image beam enters the second coupling area 121 at a second preset angle and is coupled into the second waveguide 120 by the second coupling area 121, and then is coupled out by the second coupling area 122, the first preset angle is greater than half of the first field angle, the second preset angle is greater than half of the second field angle, the first image beam coupled out by the first coupling area 112 and the second image beam coupled out by the second coupling area 122 are combined to form an output image beam 161.
[0035] The display device 100 provided in the embodiment of the present application is applied to an AR device, and is used to emit an output image 161 light beam to form an output image 161. The display device 100 in the embodiment of the present application includes a first display component and a second display component. The first display component includes a first optical machine 130 and a first waveguide 110, and the second display component includes a second optical machine 140 and a second waveguide 120. The first waveguide 110 and the second waveguide 120 are stacked, and the first coupling-out region 112 and the second coupling-out region 122 overlap in the stacking direction to form an overlapping region 151. The first coupling-in region 111 and the second coupling-in region 121 can be symmetrical about the center of the overlapping region 151. When the first waveguide 110 is working, the first image light beam is coupled into the first waveguide 110 by the first coupling-in region 111, propagates through total reflection in the first waveguide 110 to the first coupling-out region 112 and is coupled out by the first coupling-out region 112; similarly, when the second waveguide 120 is working, the second image light beam is coupled into the second waveguide 120 by the second coupling-in region 121, propagates through total reflection in the second waveguide 120 to the second coupling-out region 122 for coupling out. When the first coupling-in region 111 and the second coupling-in region 121 are symmetrical about the center of the overlap region 151, the direction of total reflection propagation in the first waveguide 110 is opposite to the direction of total reflection propagation in the second waveguide 120, so that the total reflection propagation directions of the image light beams in the first coupling-out region 112 and the second coupling-out region 122 are opposite. In this way, in the overlap region 151, the intensities of the image light beams in the first waveguide 110 and the second waveguide 120 can compensate each other, thereby improving the uniformity of the output image 161.
[0036] Specifically, in the display device 100 of the embodiment of the present application, the first waveguide 110 and the second waveguide 120 are stacked and rotated. Based on this, in order to illustrate the beneficial effects of the embodiment of the present application, the first waveguide 110 and the second waveguide 120 are separated to illustrate the image beam, such as Figure 2 A and Figure 6 D is a light path diagram of the image light beam in the first waveguide 110. Figure 3 A is the output image 161 of the first waveguide 110, Figure 3 As can be seen from A, along the propagation direction of total reflection of the image beam, the light intensity gradually decreases; similarly, Figure 2 B and 6E are optical path diagrams of the image light beam in the second waveguide 120. Figure 3 B is the output image 161 of the second waveguide 120, Figure 3 B shows that along the propagation direction of the image light beam total reflection, the light intensity gradually decreases; when the first waveguide 110 and the second waveguide 120 are rotated and stacked, the optical path diagram is as follows Figure 2 C and 6F, the output image 161 is formed as Figure 3 As shown in C, Figure 3C shows that the uniformity of the output image 161 is significantly improved. Figure 3 The profiles of the brightness topography in A, 3B, and 3C generate the corresponding normalized curves of blue light brightness versus position, and we get Figure 4 A, 4B and 4C, by Figure 4 C shows that the overall brightness uniformity of blue light is significantly improved.
[0037] It should be noted that Figure 2 and Figure 3 This is an image obtained by testing with a blue light beam. Because blue light has the shortest wavelength among the three primary colors, the shorter the step length to complete a total reflection, the easier it is to be coupled out of most of the energy by the exit pupil grating near the entrance pupil when propagating in the optical waveguide, resulting in the blue observed in the exit pupil area being concentrated on the side close to the entrance pupil. The present application can significantly improve the uniformity of blue light, and can further improve the uniformity of light beams of other wavelengths.
[0038] Specifically, the first image light beam and the second image light beam emitted by the first optical machine 130 and the second optical machine 140 carry the same image information, so that the first waveguide 110 and the second waveguide 120 carry the same image information in the overlapping area 151 .
[0039] When the light emitting direction of the first optical machine 130 is parallel to the normal direction of the first waveguide 110 (the stacking direction of the first waveguide 110 and the second waveguide 120), the first image light beam emitted by the first optical machine 130 is vertically incident on the coupling-in area, so that there is stray light reflected by the optical waveguide and returned, and after being reflected again on the surface of the first optical machine 130, it re-enters the first waveguide 110. Since the image light beam emitted by the first optical machine 130 and the light beam entering the first waveguide 110 after the second reflection have different optical paths, when the image light beam is transmitted to the human eye through the first waveguide 110, a ghost problem will appear on the displayed image, affecting the imaging quality. In the embodiment of the present application, the light emitting direction of the first optical machine 130 and the normal of the first waveguide 110 have a first preset angle, so that the first optical machine 130 is tilted relative to the normal to form a first preset angle, so that the direction of the central light beam of the image light beam coupled through the first coupling-in area 111 has a first preset angle with the first direction, thereby avoiding ghosts and improving imaging quality. The light emitting direction of the second optical machine 140 is the same as the light emitting direction of the first optical machine 130, and the light emitting direction of the second optical machine 140 has a second preset angle with the normal of the second waveguide 120, so as to avoid ghosting of the second image formed by the image light beam coupled out of the first waveguide 110 and improve the imaging quality.
[0040] Specifically, the specific values of the first preset angle and the second preset angle are not limited in the embodiment of the present application, and those skilled in the art can make specific settings according to the thickness of the first waveguide 110 and the second waveguide 120. By setting the appropriate first preset angle and the second preset angle, it can be ensured that the first optical machine 130 and the second optical machine 140 can accurately enter the eyes of the observer after passing through the first waveguide 110 and the second waveguide 120, and at the same time, the inclination angle is appropriate, and the line light beam will propagate along the expected path and will not overlap with the light of other field angles.
[0041] In addition, the first preset angle and the second preset angle can ensure that the number and angle of total reflection of the image light beam in the first waveguide 110 or the second waveguide 120 are optimized, reducing the scattering of the image light beam in the first out-coupling area 112 and the second out-coupling area 122, thereby reducing the possibility of ghosting; improving the efficiency of the image light beam coupling in the first coupling-in area 111 and the second coupling-in area 121, and improving the efficiency of the image light beam.
[0042] Among them, since the first waveguide 110 and the second waveguide 120 are stacked, the normals of the first waveguide 110 and the second waveguide 120 are perpendicular lines of the first waveguide 110 and the second waveguide 120, which are the same as the stacking direction, that is, the stacking direction is the normal of the first waveguide 110 and the second waveguide 120.
[0043] The optical machine (collectively referred to as the first optical machine 130 and the second optical machine 140) emits red, green and blue primary color light signals with high resolution, and a micro-light emitting diode, a liquid crystal display, a digital optical display or other micro-display devices can be used. In practical applications, the light beam emitted by the optical machine is spherical divergent light, and a first collimating element 131 is set on the light output side of the first optical machine 130, and a second collimating element 141 is set on the light output side of the second optical machine 140 to collimate the light beam and convert it into a parallel light beam. Among them, the first collimating element 131 and the second collimating element 141 can be composed of a lens or a lens array or other optical elements.
[0044] When the first preset angle is greater than half of the first field of view angle, and the second preset angle is greater than half of the second field of view angle, the first image light beam and the second image light beam can enter the observer's eyes at a higher angle even at the edge of the field of view, avoiding overlap with the light beams in the center field of view, thereby improving imaging quality.
[0045] Specifically, when the display device 100 provided in the embodiment of the present application is used, Figure 8 As shown, the observer observes the display device 100 at the eye position, and the first optical engine 130 and the second optical engine 140 emit Figure 8The image light beam with black font "IMAGE" passes through the display of the display device 100, and the output image 161 observed at the eye position is gray font "IMAGE", wherein the output image 161 is a virtual image, located on the side of the display device 100 away from the observer, wherein the bold solid line in the output image 161 of the display device 100 is the center line of the first image light beam coupled out by the first coupling region 112, which has a certain inclination angle (first preset angle), and the bold dotted line is the center line of the second image light beam coupled out by the second coupling region 122, which also has a certain inclination angle (second preset angle). In three-dimensional space, the display device 100 has a field of view, that is, in the imaging scene of the display device 100, the human eye can fully receive the angle range of the output image 161, such as Fig. 9 As shown, the field of view generally includes a horizontal field of view (H FOV), a vertical field of view (V FOV) and a diagonal field of view (D FOV). For the convenience of description, the four vertices of the output image 161 are represented by x, wherein the output image 161 is an image in the kx-kz plane. When eye is in the ky direction relative to the virtual image, the angle formed by the projection of the output image 161 in the ky-kz plane is V FOV, i.e., the vertical field of view of the display device 100; the angle formed by the projection of the output image 161 in the kx-kz plane is H FOV, i.e., the horizontal field of view of the display device 100; in three-dimensional space, as Fig.10 As shown, Fig.10 The angle formed by the two thin dashed lines is D FOV, that is, the diagonal field of view of the display device 100: It can be understood that, Fig.10 The angle formed by the two thin solid lines in is also D FOV. When the image is not distorted, these two angles are equal.
[0046] When setting the first preset angle and the second preset angle, specific settings may be made according to one of a horizontal field of view angle, a vertical field of view angle, and a diagonal field of view angle.
[0047] In summary, in the display device 100 provided by the present application, the first waveguide 110 and the second waveguide 120 are stacked in an offset manner, the first out-coupling region 112 and the second out-coupling region 122 overlap in the stacking direction to form an overlap region 151, and the first in-coupling region 111 and the second in-coupling region 121 are rotationally symmetrical about the center of the overlap region 151, the central beam of the first image beam enters the first in-coupling region 111 at a first preset angle and is coupled into the first waveguide 110 by the first in-coupling region 111, and then is coupled out by the first out-coupling region 112, and the central beam of the second image beam enters the second in-coupling region 122 at a second preset angle. 1 and coupled into the second waveguide 120 by the second coupling-in region 121, and then coupled out by the second coupling-out region 122, so that the direction of total reflection propagation in the first waveguide 110 is opposite to the direction of total reflection propagation in the second waveguide 120, the total reflection propagation directions of the image light beam in the first coupling-out region 112 and the second coupling-out region 122 are opposite, and the first coupling-out region 112 and the second coupling-out region 122 couple light beams in the same direction to form an output image 161. In this way, in the overlap region 151, the intensities of the image light beams in the first waveguide 110 and the second waveguide 120 can compensate each other, thereby improving the uniformity of the output image 161. In addition, the light emitting direction of the first optical machine 130 has a first preset angle with the first direction, so that the first optical machine 130 is tilted relative to the first direction to form the first preset angle, so that the direction of the central light beam of the image light beam coupled through the first coupling region 111 has a first preset angle with the first direction, thereby avoiding ghosting and improving the imaging quality, and the first preset angle is greater than half of the first field of view angle, so that even at the edge of the field of view angle, the first image light beam can enter the observer's eyes at a higher angle to avoid overlapping with the light beam of the central field of view, thereby improving the imaging quality; similarly, the second optical machine 140 is tilted and the tilt angle is greater than the second field of view angle, which can also improve the imaging quality. Therefore, the display device 100 of the present application can improve color uniformity and image quality without increasing costs and implementation difficulties.
[0048] In one implementable manner of the embodiment of the present application, the first preset angle and the second preset angle have the same size and direction, so that in the overlapping area 151, along the propagation direction of total reflection of the light beam, the light intensity of the light beams of the first waveguide 110 and the second waveguide 120 are symmetrical, thereby making the outcoupled image beam compensation of the first waveguide 110 and the second waveguide 120 more uniform, thereby further improving the uniformity of the output image 161.
[0049] Optional, such as Figure 1 and Figure 5 As shown, a first turning region 113 is further provided on the first waveguide 110 , and a second turning region 123 is further provided on the second waveguide 120 . The first turning region 113 and the second turning region 123 are rotationally symmetrical about the center of the overlap region 151 .
[0050] The first turning region 113 and the second turning region 123 are used to turn the light beam coupled in by the corresponding coupling region while propagating, thereby expanding the image light beam and increasing the field of view. The first turning region 113 and the second turning region 123 are rotationally symmetric about the center of the overlap region 151, so that the first turning region 113 and the second turning region 123 perform the same degree of turning and expanding the image light beams coupled in by the two coupling regions, thereby improving the symmetry of the two image light beams at the overlap region 151 and improving the uniformity of the output image 161.
[0051] In one achievable manner of the embodiment of the present application, the first coupling region 111 and the first turning region 113 are arranged on the first waveguide 110 along the first direction, the first turning region 113 is a trapezoid, and the section of the first turning region gradually increases away from the first coupling region 111; the second coupling region 121 and the second turning region 123 are arranged on the second waveguide 120 along the first direction, the second turning region 123 is a trapezoid, and the section of the second turning region gradually increases away from the second coupling region 121.
[0052] Optional, such as Figure 1 and Figure 5 As shown, the first optical engine 130 is disposed on a side of the first waveguide 110 away from the second waveguide 120, and the second optical engine 140 is disposed on a side of the second waveguide 120 close to the first waveguide 110; alternatively, the first optical engine 130 is disposed on a side of the first waveguide 110 close to the second waveguide 120, and the second optical engine 140 is disposed on a side of the second waveguide 120 close to the first waveguide 110.
[0053] The first optical engine 130 and the second optical engine 140 can be arranged on the same side of the combination formed by the two waveguides, or on the opposite sides of the combination formed by the two waveguides. Those skilled in the art can make arrangements according to actual conditions, which can make the display device 100 of the embodiment of the present application more flexible and easy to match different usage scenarios.
[0054] In one achievable manner of the embodiment of the present application, projections of the first outcoupling region 112 and the second outcoupling region 122 in the stacking direction completely overlap.
[0055] As can be seen from the above, at the position where the first outcoupling region 112 and the second outcoupling region 122 overlap, the image light beam emitted by the first optical machine 130 and the image light beam emitted by the second optical machine 140 compensate each other, thereby improving the uniformity of the output image 161. The projections of the first outcoupling region 112 and the second outcoupling region 122 in the stacking direction completely overlap, thereby making full use of the first outcoupling region 112 and the second outcoupling region 122, thereby improving the uniformity of the output image 161 while reducing the volume of the display device 100.
[0056] It should be noted that the complete overlap of the projections of the first outcoupling region 112 and the second outcoupling region 122 in the stacking direction is a preferred embodiment of the present application. Figure 7 As shown, there is partial overlap, and those skilled in the art can set the size of the overlapping area 151 according to actual conditions.
[0057] Optionally, the brightness of the first image light beam and the second image light beam are different to improve the color uniformity of the output image light beam.
[0058] Among them, the first image beam is the beam emitted by the first optical machine 130, and the second image beam is the beam emitted by the second optical machine 140, that is, the display device of the embodiment of the present application includes two independent optical machines, the first optical machine 130 and the second optical machine 140. By adjusting the brightness of the beams emitted by the first optical machine 130 and the second optical machine 140, that is, adjusting the brightness of the first image beam and the second image beam, the color uniformity of the output image beam can be improved.
[0059] Specifically, an independent brightness control unit is used to control the light output brightness of the first optical engine 130 and the second optical engine 140 respectively, so that the light output brightness of each can be accurately adjusted, so that the color uniformity of the output image light beam can be achieved and the color deviation can be reduced. In addition, by independently controlling the brightness of the two light engines, the display characteristics can be adjusted more flexibly to adapt to different display contents and viewing environments. Furthermore, the brightness of the optical engine can be adjusted according to the real-time image content in combination with an algorithm to improve the adaptability of the display device and the user experience.
[0060] The present application also discloses an AR device, including the above-mentioned display device 100. The AR device includes the same structure and beneficial effects as the display device 100 in the above-mentioned embodiment. The structure and beneficial effects of the display device 100 have been described in detail in the above-mentioned embodiment, and will not be repeated here.
[0061] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A display device, characterized in that: The invention comprises a first display component and a second display component, wherein the first display component comprises a first optical machine and a first waveguide arranged on the light-emitting side of the first optical machine, the second display component comprises a second optical machine and a second waveguide arranged on the light-emitting side of the second optical machine, the first waveguide and the second waveguide are staggered and stacked, the first waveguide is provided with a first coupling-in region and a first coupling-out region, the second waveguide is provided with a second coupling-in region and a second coupling-out region, the first coupling-out region and the second coupling-out region at least partially overlap in a stacking direction to form an overlapping region, the first optical machine emits a first image light beam having a first field of view angle, and the first image The central beam of the light beam enters the first coupling region at a first preset angle and is coupled into the first waveguide by the first coupling region, and then is coupled out by the first coupling region. The second optical machine emits a second image beam with a second field of view angle. The central beam of the second image beam enters the second coupling region at a second preset angle and is coupled into the second waveguide by the second coupling region, and then is coupled out by the second coupling region. The first preset angle is greater than half of the first field of view angle, and the second preset angle is greater than half of the second field of view angle. The first image beam coupled out by the first coupling region and the second image beam coupled out by the second coupling region are combined to form an output image beam.
2. The display device according to claim 1, characterized in that The first preset angle and the second preset angle have the same magnitude and the same direction.
3. The display device according to claim 1, characterized in that The first image light beam and the second image light beam carry the same image information.
4. The display device according to claim 1, characterized in that The first waveguide is further provided with a first turning region, and the second waveguide is further provided with a second turning region, and the first turning region and the second turning region are rotationally symmetric about the center of the overlapping region.
5. The display device according to claim 4, characterized in that: The first coupling region and the first turning region are arranged on the first waveguide along a first direction, the first turning region is trapezoidal, and the section of the first turning region gradually increases away from the first coupling region; The second coupling region and the second turning region are arranged on the second waveguide along a first direction, the second turning region is trapezoidal, and a section of the second turning region gradually increases away from the second coupling region.
6. The display device according to claim 1, characterized in that: The first optical engine is arranged on a side of the first waveguide away from the second waveguide, and the second optical engine is arranged on a side of the second waveguide close to the first waveguide; alternatively, the first optical engine is arranged on a side of the first waveguide close to the second waveguide, and the second optical engine is arranged on a side of the second waveguide close to the first waveguide.
7. The display device according to claim 1, characterized in that: Projections of the first outcoupling region and the second outcoupling region in the stacking direction completely overlap.
8. The display device according to claim 1, characterized in that: The first coupling region and the second coupling region are rotationally symmetric about the center of the overlap region.
9. The display device according to claim 1, characterized in that: The brightness of the first image light beam and the second image light beam are different to improve the color uniformity of the output image light beam.
10. An AR device, characterized in that: A display device comprising any one of claims 1 to 9.