Display device and augmented reality display equipment

Abstract

The invention provides a display device and an augmented reality display device.The display device comprises a display module, a light splitting module, a first waveguide and a second waveguide, the display module is used for emitting imaging light beams, and the imaging light beams comprise the first imaging light beam and the second imaging light beam; the wavelength range of the first imaging light beam is different from that of the second imaging light beam; the light splitting module is arranged on a light emitting path of the imaging light beam and is used for splitting the incident imaging light beam into two imaging light beams, and the two imaging light beams are propagated along a first light path and a second light path respectively; the first waveguide is arranged on the first light path, and a first filtering piece is arranged on a transmission path of the first waveguide and used for screening out and emitting a first imaging light beam to the left eye; the second waveguide is arranged on the second light path, and a second filtering piece is arranged on a transmission path of the second waveguide and used for screening out and emitting a second imaging light beam to the right eye. According to the technical scheme, the stereoscopic display effect can be achieved through the scheme of the single display module.

Description

Technical Field

[0001] The present invention relates to the field of AR glasses optical imaging display technology, and in particular to a display device and an augmented reality display equipment. Background Art

[0002] In the related art, in order to realize the lightweight design of the display device, the display device can adopt a single optical machine solution for display, that is, a single optical machine is used to project images to the left and right eyes of a person at the same time. However, since a single optical machine can usually only display one display screen at the same time, when a single optical machine is used to project images to the left and right eyes of a person at the same time, the left and right eyes will see the same display screen, and the left and right eyes cannot form parallax, thereby failing to achieve a stereoscopic display effect. Summary of the invention

[0003] The main purpose of the present invention is to provide a display device and an augmented reality display equipment, aiming to achieve a stereoscopic display effect through a single display module solution.

[0004] To achieve the above object, the present invention provides a display device, comprising:

[0005] A display module, wherein the display module is used to emit an imaging light beam, wherein the imaging light beam includes a first imaging light beam and a second imaging light beam, and a wavelength range of the first imaging light beam is different from a wavelength range of the second imaging light beam;

[0006] A light splitting module, which is disposed on the light exiting path of the imaging light beam and is used to split the incident imaging light beam into two imaging light beams, and the two imaging light beams propagate along a first light path and a second light path respectively;

[0007] A first waveguide, wherein the first waveguide is disposed on the first optical path, and a first filter is disposed on the transmission path of the first waveguide, for filtering out and coupling out the first imaging light beam to the left eye; and

[0008] A second waveguide is provided on the second optical path. A second filter is provided on the transmission path of the second waveguide for filtering out and coupling out the second imaging light beam to the right eye.

[0009] Optionally, the first waveguide includes a first substrate and a first coupling-in region and a first coupling-out region provided on the first substrate, the first coupling-in region is provided corresponding to the first optical path, and the first coupling-out region and the first coupling-in region are provided at intervals.

[0010] Optionally, the first filter element is arranged upstream of the first coupling-in region or downstream of the first coupling-out region.

[0011] Optionally, the second waveguide includes a second substrate and a second coupling-in region and a second coupling-out region provided on the second substrate, the second coupling-in region is provided corresponding to the second optical path, and the second coupling-out region and the second coupling-in region are provided at intervals.

[0012] Optionally, the second filter element is arranged upstream of the second coupling-in region or downstream of the second coupling-out region.

[0013] Optionally, the first waveguide and / or the second waveguide is a single-layer optical waveguide.

[0014] Optionally, the display module comprises a red light unit, a green light unit and a blue light unit, which are used to emit red light, green light and blue light respectively;

[0015] The first imaging light beam is one of red light, green light and blue light, and the second imaging light beam is correspondingly one of green-blue light, red-blue light and red-green light.

[0016] Optionally, the first imaging light beam is one of red light and green light, and the second imaging light beam is the other of red light and green light;

[0017] And / or, the first imaging light beam is one of red light and blue light, and the second imaging light beam is the other of red light and blue light;

[0018] And / or, the first imaging light beam is one of green light and blue light, and the second imaging light beam is the other of green light and blue light.

[0019] Optionally, the first waveguide and the second waveguide are arranged side by side, and the display module is arranged at a middle position facing the first waveguide and the second waveguide;

[0020] And / or, the first filter element is attached to the first waveguide;

[0021] And / or, the second filter element is attached to the second waveguide.

[0022] The present invention further provides an augmented reality display device, comprising any one of the display devices described above, wherein the display device comprises:

[0023] A display module, wherein the display module is used to emit an imaging light beam, wherein the imaging light beam includes a first imaging light beam and a second imaging light beam, and a wavelength range of the first imaging light beam is different from a wavelength range of the second imaging light beam;

[0024] A light splitting module, which is disposed on the light exiting path of the imaging light beam and is used to split the incident imaging light beam into two imaging light beams, and the two imaging light beams propagate along a first light path and a second light path respectively;

[0025] A first waveguide, wherein the first waveguide is disposed on the first optical path, and a first filter is disposed on the transmission path of the first waveguide, for filtering out and coupling out the first imaging light beam to the left eye; and

[0026] A second waveguide, the second waveguide is arranged on the second optical path, and a second filter is arranged on the transmission path of the second waveguide, for filtering out and coupling out the second imaging light beam to the right eye 。

[0027] According to the technical solution of the present invention, the imaging light beam emitted by a single display module includes a first imaging light beam and a second imaging light beam with different wavelength ranges, and the imaging light beam can be decomposed into two light paths in different directions under the spectroscopic effect of the spectroscopic module, and respectively transmitted to the first waveguide and the second waveguide; wherein the transmission paths of the first waveguide and the second waveguide are respectively provided with a first filter and a second filter, and the first filter and the second filter can selectively transmit the imaging light beam with a specific wavelength, therefore, the imaging light beam with the first wavelength and the imaging light beam with the second wavelength can be respectively transmitted to the left and right eyes of the user through the first waveguide and the second waveguide, so that the display device can simultaneously project different images to the left and right eyes of the person through a single display module, thereby simulating the situation that there is a difference in the images on the retinas of the left and right eyes when the person is looking at an object, so that the human brain can judge the spatial position relationship of the object according to the difference in the images at the left and right eyes, so that the person has a stereoscopic vision, that is, according to the technical solution of the present invention, different images can be projected toward the left and right eyes respectively through a single display module, so that the left and right eyes form parallax through the difference in the images of the left and right eyes, so that the left and right eyes can form parallax and achieve a stereoscopic display effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0029] Figure 1 FIG. 4 is a structural diagram of a display device according to an embodiment of the present invention.

[0030] Description of Figure Numbers:

[0031]

[0032]

[0033] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0036] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0038] The display device of a traditional augmented reality display device generally adopts a dual-optical machine solution, that is, two optical machines are used to project images to the left and right eyes of a person respectively, and the two optical machines are used to render the images projected to the left and right eyes respectively through an algorithm, so that the left and right eyes can form parallax, thereby achieving a stereoscopic display effect. However, the solution of using a dual-optical machine will increase the weight and volume of the augmented reality display device, which is not conducive to lightweight design. For this reason, in the related art, the display device can also adopt a single-optical machine solution for display, that is, one optical machine is used to project images to the left and right eyes of a person at the same time. However, since a single-optical machine can usually only display one display screen at the same time, when a single-optical machine is used to project images to the left and right eyes of a person at the same time, the left and right eyes will see the same display screen, and the left and right eyes cannot form parallax, so since the single-optical machine has only one display screen, the stereoscopic display effect cannot be achieved. Therefore, the present invention proposes a display device, which simultaneously emits a first imaging light beam and a second imaging light beam with different wavelength ranges through a display module, so that the light beams of the pictures input to the left and right eyes can be screened by screening the wavelength range, so that the display device can project different images to the left and right eyes of a person at the same time through a single display module, thereby simulating the situation where there is a difference in the images on the retinas of the left and right eyes when a person is looking at an object, so that the human brain can judge the spatial position relationship of the object according to the difference in the images at the left and right eyes, so that the person can have stereoscopic vision. That is, the technical solution of the present invention can project different images to the left and right eyes respectively through a single display module 10, so that the left and right eyes form parallax through the difference in the left and right eye images, thereby forming parallax and producing a stereoscopic effect, thereby better achieving the purpose of augmented reality.

[0039] Please combine Figure 1 In some embodiments of the display device 100 of the present invention, the display device 100 includes:

[0040] A display module 10, wherein the display module 10 is used to emit an imaging light beam, wherein the imaging light beam includes a first imaging light beam and a second imaging light beam, and the wavelength range of the first imaging light beam is different from the wavelength range of the second imaging light beam;

[0041] A light splitting module 20, which is disposed on the light exiting path of the imaging light beam and is used to split the incident imaging light beam into two imaging light beams, and the two imaging light beams propagate along a first light path and a second light path respectively;

[0042] A first waveguide 30, wherein the first waveguide 30 is disposed on the first optical path, and a first filter 40 is disposed on the transmission path of the first waveguide 30, for filtering and emitting the first imaging light beam to the left eye; and

[0043] The second waveguide 50 is disposed on the second optical path. A second filter 60 is disposed on the transmission path of the second waveguide 50 for filtering out and emitting the second imaging light beam to the right eye.

[0044] In this embodiment, the display module 10 is used to generate an imaging beam for forming a virtual image, and the imaging beam includes a first imaging beam and a second imaging beam with different wavelength ranges; the light splitting module 20 can be set as a beam splitter, which can decompose the imaging beam emitted by the display module 10 into two light beams, which are respectively transmitted along the first light path and the second light path, and are emitted in parallel and collimated to the first waveguide 30 and the second waveguide 50. A first filter 40 is provided on the transmission path of the first waveguide 30, which can transmit a light beam with a specific wavelength, so that the first imaging beam can be screened out and emitted to the left eye; a second filter 60 is provided on the transmission path of the second waveguide 50, which can transmit a light beam with a specific wavelength, so that the second imaging beam can be screened out and emitted to the right eye, thereby realizing binocular display of the display module 10.

[0045] Among them, the first waveguide 30 and the second waveguide 50 can be both set as diffraction waveguides, which can use the diffraction effect to guide and control the propagation of light. The first waveguide 30 and the second waveguide 50 can also be both set as geometric waveguides, which use the principle of total reflection to guide the propagation of light, which is not limited here.

[0046] It should be noted that the display module 10 can be set as an RGB display screen, and the image displayed by the RGB display screen can be divided into three RGB channels, which can be used to emit RGB three-color light. Since the wavelength ranges of the RGB three-color light are different, the imaging light beam can be distinguished by the wavelength range, that is, the display module 10 can be divided into two display parts according to the different wavelength ranges, and used to display two different pictures respectively, so that the two different pictures can be processed for stereoscopic display by the algorithm respectively, and projected on the RGB display screen for display; in this way, the light emitted by the two display parts is emitted to the left and right eyes respectively through the total reflection of the first waveguide 30 and the second waveguide 50, so that the left and right eyes can receive two different images to form binocular parallax and produce a stereoscopic image.

[0047] Please combine Figure 1 In some embodiments of the display device 100 of the present invention, the first waveguide 30 includes a first substrate 31 and a first coupling-in region 32 and a first coupling-out region 33 arranged on the first substrate 31, the first coupling-in region 32 is arranged corresponding to the first optical path, and the first coupling-out region 33 and the first coupling-in region 32 are arranged at intervals.

[0048] In this embodiment, the first waveguide 30 includes a first substrate 31 and a first coupling-in region 32 and a first coupling-out region 33 provided on the first substrate 31. The first coupling-in region 32 is provided corresponding to the first optical path and is used to receive the imaging light beam transmitted along the first optical path. The first coupling-out region 33 and the first coupling-in region 32 are provided at intervals. The first coupling-in region 32 is provided with a coupling-in grating, which is used to change the incident angle of the incident light entering the first substrate 31, so that the incident angle is greater than or equal to the critical angle, so that the incident light can be totally reflected in the first substrate 31 to complete the transmission of the light; the first coupling-out region 33 is provided with a coupling-out grating, and the incident angle of the light coupled into the first substrate 31 by the coupling-in grating is deflected again when it is emitted to form a display image to be obtained by the human eye.

[0049] The coupling-in grating and the coupling-out grating can be printed on the first substrate 31 as separate optical elements, or can be formed into the coupling-in grating and the coupling-out grating structures respectively on the first coupling-in region 32 and the first coupling-out region 33 of the first substrate 31, which is not limited here.

[0050] Please combine Figure 1 In some embodiments of the display device 100 of the present invention, the first filter element 40 is disposed upstream of the first coupling-in region 32 or downstream of the first coupling-out region 33 .

[0051] In this embodiment, the first filter element 40 is disposed on the transmission path of the first waveguide 30, and can play a role in screening the imaging light beam emitted by the display module 10 by transmitting the light beam with a specific wavelength range. In one embodiment, the first filter element 40 is disposed upstream of the first coupling-in region 32, and is used to screen the imaging light beam coupled into the first waveguide 30 into the first imaging light beam; in another embodiment, the first filter element 40 is disposed downstream of the first coupling-out region 33, and is used to convert the imaging light beam coupled out of the first waveguide 30 into the first imaging light beam, so that only the first imaging light beam can be transmitted to the left eye, which is not limited here.

[0052] Among them, the first filter element 40 can be set as a bandpass filter, which can only transmit color light within a specific wavelength range; the first filter element 40 can also be set as a cutoff filter, which is used to cut off the transmission of color light outside a specific wavelength range, which is not limited here.

[0053] Please combine Figure 1 In some embodiments of the display device 100 of the present invention, the second waveguide 50 includes a second substrate 51 and a second coupling-in region 52 and a second coupling-out region 53 arranged on the second substrate 51, the second coupling-in region 52 is arranged corresponding to the second optical path, and the second coupling-out region 53 and the second coupling-in region 52 are arranged at intervals.

[0054] In this embodiment, the second waveguide 50 includes a second substrate 51 and a second coupling-in region 52 and a second coupling-out region 53 provided on the second substrate 51. The second coupling-in region 52 is provided corresponding to the second optical path and is used to receive the imaging light beam transmitted along the second optical path. The second coupling-out region 53 and the second coupling-in region 52 are provided at intervals. Similarly, the second coupling-in region 52 is provided with a coupling-in grating, which is used to change the incident angle of the incident light entering the second substrate 51, so that the incident angle is greater than or equal to the critical angle, so that the incident light can be totally reflected in the second substrate 51 to complete the transmission of the light; the second coupling-out region 53 is provided with a coupling-out grating, and the incident angle of the light coupled into the second substrate 51 by the coupling-in grating is deflected again when it is emitted to form a display image to be obtained by the human eye.

[0055] The coupling-in grating and the coupling-out grating may be printed on the second substrate 51 as separate optical elements, or may be formed into the coupling-in grating and the coupling-out grating structures in the second coupling-in region 52 and the second coupling-out region 53 of the second substrate 51, respectively, which is not limited here.

[0056] Please combine Figure 1 In some embodiments of the display device 100 of the present invention, the second filter element 60 is disposed upstream of the second coupling-in region 52 or downstream of the second coupling-out region 53 .

[0057] In this embodiment, the second filter element 60 is disposed on the transmission path of the second waveguide 50, and can filter the imaging light beam emitted by the display module 10 by transmitting the light beam with a specific wavelength range. In one embodiment, the second filter element 60 is disposed upstream of the second coupling-in region 52, and is used to filter the imaging light beam coupled into the second waveguide 50 into the second imaging light beam; in another embodiment, the second filter element 60 is disposed downstream of the second coupling-out region 53, and is used to convert the imaging light beam coupled out of the second waveguide 50 into the second imaging light beam, so that only the first imaging light beam can be transmitted to the right eye, which is not limited here.

[0058] Among them, the second filter element 60 can be set as a bandpass filter, which can only transmit color light within a specific wavelength range; the second filter element 60 can also be set as a cutoff filter, which is used to cut off the transmission of color light outside a specific wavelength range, which is not limited here.

[0059] Please combine Figure 1 In some embodiments of the display device 100 of the present invention, the first waveguide 30 and / or the second waveguide 50 is a single-layer optical waveguide.

[0060] In this embodiment, the first waveguide 30 and the second waveguide 50 both use single-layer optical waveguides to transmit the imaging light beam. In this way, compared with the solution of realizing the imaging light beam through a double-layer grating waveguide, the design and process of the double-layer grating waveguide are both difficult, so the uniformity of the full-color image is poor. Therefore, the technical solution of the present invention can improve the uniformity of the image by setting the first waveguide 30 and the second waveguide 50 as single-layer optical waveguides, thereby improving the user experience of the augmented reality display device.

[0061] On this basis, since the first filter element 40 located on the transmission path of the first waveguide 30 and the second filter element 60 located on the transmission path of the second waveguide 50 can respectively filter light beams in different wavelength ranges, the images coupled into the left and right eyes can have different colors, respectively. This can further realize the function of classifying information by color, thereby improving the practicality and functionality of the augmented reality display device.

[0062] In some embodiments of the display device 100 of the present invention, the display module 10 includes a red light unit, a green light unit and a blue light unit, which are used to emit red light, green light and blue light respectively, the first imaging light beam is one of red light, green light and blue light, and the second imaging light beam corresponds to one of green-blue light, red-blue light and red-green light;

[0063] And / or, the first imaging light beam is one of red light and green light, and the second imaging light beam is the other of red light and green light;

[0064] And / or, the first imaging light beam is one of red light and blue light, and the second imaging light beam is the other of red light and blue light;

[0065] And / or, the first imaging light beam is one of green light and blue light, and the second imaging light beam is the other of green light and blue light.

[0066] In the present embodiment, the display module 10 may be an RGB display screen, which includes a red light unit, a green light unit, and a blue light unit, for respectively emitting red light, green light, and blue light, and the wavelength ranges of the red light, green light, and blue light are different. Thus, a filter may be provided to screen wavelengths in a specific range, so that the wavelengths of the light beams respectively coupled into the left and right eyes by the first waveguide 30 and the second waveguide 50 are different, thereby making the light beams respectively coupled into the left and right eyes by the first waveguide 30 and the second waveguide 50 have different colors. Thus, the different-colored images of the left and right eyes seen by the human eye can form parallax to synthesize a stereoscopic image, thereby improving the augmented reality experience.

[0067] Among them, the red light unit, the green light unit and the blue light unit can be divided into two groups, for example, one group is monochromatic light and the other group is two-color light. The monochromatic light can be one of red light, green light and blue light to form a first imaging light beam, and the two-color light can correspond to one of green-blue light, red-blue light and red-green light to form a second imaging light beam.

[0068] Of course, in another embodiment, the red light unit, the green light unit and the blue light unit may only use two monochromatic light units, for example, the first imaging beam and the second imaging beam are set to red light and green light, red light and blue light, green light and blue light, respectively, which is not limited here.

[0069] Please combine Figure 1 In some embodiments of the display device 100 of the present invention, the first waveguide 30 and the second waveguide 50 are arranged side by side, and the display module 10 is arranged at a middle position opposite to the first waveguide 30 and the second waveguide 50 .

[0070] In this embodiment, the first waveguide 30 and the second waveguide 50 are arranged side by side and correspond to the left and right eye positions of the user respectively. The display module 10 is arranged at the middle position opposite to the first waveguide 30 and the second waveguide 50, so that the display module 10 and the spectroscopic module 20 can roughly correspond to the position of the user's nose bridge. Moreover, compared with the setting scheme of the dual-light machine, the space volume and weight occupied by a single display module 10 and a single spectroscopic module 20 are smaller, which is not easy to interfere with the line of sight of the human eye, and can reduce the power consumption of the display device 100 to a certain extent, which is conducive to realizing the lightweight design of the augmented reality display device, and can improve the wearing experience of the reality display device to a certain extent.

[0071] In some embodiments of the display device 100 of the present invention, the first filter element 40 is attached to the first waveguide 30 .

[0072] And / or, the second filter element 60 is attached to the second waveguide 50 .

[0073] In this embodiment, the first filter can be an independently arranged optical element, or can be set as a film layer plated or attached to the surface of the first waveguide 30, so that the first filter and the first waveguide 30 can be arranged compactly, which is beneficial to reduce the occupied space of the screen module. The first filter can be attached to the first coupling-in area 32 of the first waveguide 30, or to the first coupling-out area 33 of the first waveguide 30, which is not limited here.

[0074] Similarly, the second filter can be an independently arranged optical element, or can be set as a film layer plated or attached to the surface of the first waveguide 30, so that the second filter and the second waveguide 50 can be arranged compactly, which is beneficial to reduce the occupied space of the screen module. The second filter can be attached to the second coupling-in area 52 of the second waveguide 50, or to the second coupling-out area 53 of the second waveguide 50.

[0075] The present invention further proposes an augmented reality display device, which includes the display device 100 described in any of the aforementioned embodiments. The specific structure of the display device 100 refers to any of the aforementioned embodiments. Since the augmented reality display device proposed in this application can apply all the technical solutions in all the aforementioned embodiments, it at least has all the beneficial effects brought by the aforementioned technical solutions, which are not described one by one here.

[0076] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A display device, characterized in that: include: A display module, wherein the display module is used to emit an imaging light beam, wherein the imaging light beam includes a first imaging light beam and a second imaging light beam, and a wavelength range of the first imaging light beam is different from a wavelength range of the second imaging light beam; A light splitting module, which is disposed on the light exiting path of the imaging light beam and is used to split the incident imaging light beam into two imaging light beams, and the two imaging light beams propagate along a first light path and a second light path respectively; A first waveguide, wherein the first waveguide is disposed on the first optical path, and a first filter is disposed on the transmission path of the first waveguide, for filtering and emitting the first imaging light beam to the left eye; as well as A second waveguide is provided on the second optical path. A second filter is provided on the transmission path of the second waveguide for filtering out and emitting the second imaging light beam to the right eye.

2. The display device according to claim 1, wherein: The first waveguide includes a first substrate and a first coupling-in region and a first coupling-out region arranged on the first substrate. The first coupling-in region is arranged corresponding to the first optical path, and the first coupling-out region and the first coupling-in region are arranged at intervals.

3. The display device according to claim 2, wherein: The first filter element is disposed upstream of the first coupling-in region or downstream of the first coupling-out region.

4. The display device according to claim 1, wherein: The second waveguide includes a second substrate and a second coupling-in region and a second coupling-out region disposed on the second substrate. The second coupling-in region is disposed corresponding to the second optical path, and the second coupling-out region and the second coupling-in region are disposed at intervals.

5. The display device according to claim 4, characterized in that The second filter element is disposed upstream of the second incoupling region or downstream of the second outcoupling region.

6. The display device according to any one of claims 1 to 5, characterized in that: The first waveguide and / or the second waveguide is a single-layer optical waveguide.

7. The display device according to any one of claims 1 to 5, characterized in that: The display module comprises a red light unit, a green light unit and a blue light unit, which are used to emit red light, green light and blue light respectively; The first imaging light beam is one of red light, green light and blue light, and the second imaging light beam is correspondingly one of green-blue light, red-blue light and red-green light.

8. The display device according to any one of claims 1 to 5, characterized in that: The first imaging light beam is one of red light and green light, and the second imaging light beam is the other of red light and green light; And / or, the first imaging light beam is one of red light and blue light, and the second imaging light beam is the other of red light and blue light; And / or, the first imaging light beam is one of green light and blue light, and the second imaging light beam is the other of green light and blue light.

9. The display device according to any one of claims 1 to 5, characterized in that: The first waveguide and the second waveguide are arranged side by side, and the display module is arranged at a middle position opposite to the first waveguide and the second waveguide; And / or, the first filter element is attached to the first waveguide; And / or, the second filter element is attached to the second waveguide.

10. An augmented reality display device, characterized in that: A display device as claimed in any one of claims 1 to 9.

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