Display device and augmented reality display equipment

Abstract

The invention provides a display device and augmented reality display equipment, the display device comprises a display assembly, a light splitting assembly, a first waveguide and a second waveguide, the display assembly periodically and alternately emits linearly polarized light with a first polarization state and a second polarization state, and the first polarization state and the second polarization state are orthogonally arranged; the light splitting assembly is arranged on a light emitting path of the display assembly and is used for splitting incident linearly polarized light into two beams, and the two beams are transmitted along a first light path and a second light path respectively; the first waveguide is arranged on the first light path, a first polarization piece is arranged on a transmission path of the first waveguide, and the first polarization piece can screen out and emit linearly polarized light with a first polarization state to the left eye; the second waveguide is arranged on the second light path, a second polarization piece is arranged on a transmission path of the second waveguide, and the second polarization piece can screen out and emit linearly polarized light in a second polarization state to the right eye. According to the technical scheme, the stereoscopic display effect can be achieved through the scheme of the single display assembly.

Description

Technical Field

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

[0002] At present, the display device of augmented reality display equipment mostly uses a dual-optical machine for display, that is, two optical machines are used to project images to the left and right eyes of a person respectively, which can form a good three-dimensional display effect. However, the dual-optical machine solution has a high manufacturing cost and increases the weight and volume of the augmented reality display device, which is not conducive to lightweight design. Summary of the invention

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

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

[0005] A display component, wherein the display component periodically and alternately emits linearly polarized light having a first polarization state and a second polarization state, wherein the first polarization state and the second polarization state are arranged orthogonally;

[0006] A light splitting component, which is arranged on the light output path of the display component and is used to split the incident linearly polarized light into two beams, and transmit them 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, a first polarizer is disposed on the transmission path of the first waveguide, and the first polarizer can filter out and emit linearly polarized light having the first polarization state to the left eye; and

[0008] A second waveguide is arranged on the second optical path. A second polarizer is arranged on the transmission path of the second waveguide. The second polarizer can filter out and emit linearly polarized light having the second polarization state to the right eye.

[0009] Optionally, the display component includes:

[0010] An optical machine, the optical machine is used to periodically and alternately emit a first image and a second image, wherein the first image and the second image are both circularly polarized light; and

[0011] A quarter wave plate, which is movably disposed on the light output path of the optical machine and has a first state and a second state, and the quarter wave plate periodically switches between the first state and the second state;

[0012] When the quarter wave plate is in the first state, it can convert the first image into the linear polarized light with the first polarization state. When the quarter wave plate is in the second state, it can convert the second image into the linear polarized light with the second polarization state.

[0013] Optionally, the quarter wave plate is rotatable along a first direction, and the first direction is perpendicular to a transmission direction of the output light of the optical machine.

[0014] Optionally, the frequency at which the optical machine alternately emits the first image and the second image is an integer multiple of 120 Hz.

[0015] Optionally, the light splitting component includes:

[0016] A fixed structure, the fixed structure having a light incident surface and a light emitting surface arranged in opposite directions, the light incident surface is arranged toward the display device, the light emitting surface has a first light emitting area and a second light emitting area arranged at intervals, the first light emitting area is arranged corresponding to the first light path, and the second light emitting area is arranged corresponding to the second light path;

[0017] A light splitting mechanism, which is disposed on the fixed structure and corresponding to the light incident surface, and is used to receive incident light vertically incident on the light incident surface, and decompose the incident light into a first light beam and a second light beam that are transmitted in opposite directions in a horizontal direction;

[0018] a first emitting mechanism, which is disposed on the fixed structure and located on a transmission path of the first light beam, and is used to receive the first light beam and vertically reflect the first light beam to the first light exiting area, so that the first light beam is transmitted along the first light path; and

[0019] The second emitting mechanism is arranged on the fixed structure and is located on the transmission path of the second light beam. The first emitting mechanism is used to receive the second light beam and vertically reflect the second light beam to the second light exit area so that the second light beam is transmitted along the second light path.

[0020] Optionally, the first waveguide comprises 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 is used to receive the linearly polarized light transmitted along the first optical path, and the first coupling-out region and the first coupling-in region are provided at intervals;

[0021] The first polarizer is disposed upstream of the first coupling-in region. The transmission polarization direction of the first polarizer is the same as the polarization direction of the linear polarized light with the first polarization state, and is used to transmit the linear polarized light with the first polarization state.

[0022] Optionally, the first polarizer is attached to the first waveguide.

[0023] 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 first optical path and is used to receive the linearly polarized light transmitted along the first optical path, and the second coupling-out region and the second coupling-in region are provided at intervals;

[0024] The second polarizer is disposed upstream of the second coupling-in region. The transmission polarization direction of the second polarizer is the same as the polarization direction of the linear polarized light with the first polarization state, and is used to transmit the linear polarized light with the second polarization state.

[0025] Optionally, the second polarizer is attached to the first waveguide.

[0026] The present invention further provides an augmented reality display device, comprising any one of the display devices described above, wherein the display device comprises:

[0027] A display component, wherein the display component periodically and alternately emits linearly polarized light having a first polarization state and a second polarization state, wherein the first polarization state and the second polarization state are arranged orthogonally;

[0028] A light splitting component, which is arranged on the light output path of the display component and is used to split the incident linearly polarized light into two beams, and transmit them along a first light path and a second light path respectively;

[0029] A first waveguide, wherein the first waveguide is disposed on the first optical path, a first polarizer is disposed on the transmission path of the first waveguide, and the first polarizer can filter out and emit linearly polarized light having the first polarization state to the left eye; and

[0030] A second waveguide is arranged on the second optical path. A second polarizer is arranged on the transmission path of the second waveguide. The second polarizer can filter out and emit linearly polarized light having the second polarization state to the right eye.

[0031] According to the technical solution of the present invention, a single display component can periodically and alternately emit linear polarized light of a first polarization state and a second polarization state, and the linear polarized light of the first polarization state and the second polarization state can be decomposed into two beams by a beam splitter component, and transmitted to the first waveguide and the second waveguide along the first optical path and the second optical path respectively, wherein a first polarizer is provided on the transmission path of the first waveguide, and a second polarizer is provided on the transmission path of the second waveguide, and the first polarizer and the second polarizer can selectively transmit linear polarized light with a specific polarization state, thereby making the linear polarized light of the first polarization state and the second polarization state alternately emitted to the left and right eyes, that is, the first image and the second image emitted by a single display component can be alternately transmitted to the left eye and the right eye, so as to achieve the purpose of seeing different images for the two eyes with the help of the visual persistence mechanism of the human eye, thereby simulating the situation that when a person looks at an object, there is a difference in the images on the retinas of the left and right eyes, 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 as to make the person have stereoscopic vision. Therefore, the technical solution of the present invention achieves the purpose of allowing the two eyes to see different images by alternately transmitting the first image and the second image emitted by a single display component to the left eye and the right eye with the help of the visual persistence mechanism of the human eye. Therefore, the difference between the first image and the second image can be used to form parallax between the left and right eyes to produce a three-dimensional effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] 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.

[0033] Figure 1 is a structural diagram of an embodiment of a display device of the present invention;

[0034] Figure 2 for Figure 1 Structural diagram of the light splitting component of the display device.

[0035] Description of Figure Numbers:

[0036] Label name Label name 100 Display device 31 First base 10 Display Components 32 First coupling region 11 Optical Machine 33 First decoupling zone 12 Quarter Wave Plate 40 The first polarizer 20 Spectral Components 50 Second waveguide 21 Fixed structure 51 Second base 22 Spectroscopic mechanism 52 The second coupling region 23 The first ejection mechanism 53 The second coupling zone 24 The second ejection mechanism 60 Second polarizer 30 First Waveguide

[0037] 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

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] The display device 100 of a conventional 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 dual optical machine solution will increase the weight and volume of the augmented reality display device, which is not conducive to lightweight design. Therefore, the present invention proposes a display device 100, which periodically and alternately emits linearly polarized light with a first polarization state and a second polarization state through a display component 10, so that the polarization state of the linearly polarized light on the transmission path of the first waveguide 30 and the second waveguide 50 can be screened, so that the linearly polarized light with the first polarization state is emitted to the left eye, or the linearly polarized light with the second polarization state is emitted to the right eye; therefore, in the technical solution of the present invention, the display component 10 can periodically and alternately emit linearly polarized light with the first polarization state and the second polarization state, and the linearly polarized light with the first polarization state and the linearly polarized light with the second polarization state can be periodically and alternately emitted to the left and right eyes, that is, the technical solution of the present invention can adopt a time division multiplexing method, so that the linearly polarized light with the first polarization state and the linearly polarized light with the second polarization state emitted by the display screen of a single display component 10 can be alternately arranged in a time period and periodically and repeatedly transmitted, so that the left and right eyes alternately receive the linearly polarized light with the first polarization state and the linearly polarized light with the second polarization state, so that the stereoscopic display effect can be realized by using the visual persistence mechanism of the human eye, and a better augmented reality experience can be achieved.

[0043] Please refer to Figure 1 to Figure 2 In some embodiments of the display device 100 of the present invention, the display device 100 includes:

[0044] A display component 10, wherein the display component 10 periodically and alternately emits linearly polarized light having a first polarization state and a second polarization state, wherein the first polarization state and the second polarization state are orthogonally arranged;

[0045] A light splitting component 20, which is disposed on the light output path of the display component 10, and is used to split the incident linearly polarized light into two beams, and transmit them along a first light path and a second light path respectively;

[0046] A first waveguide 30, wherein the first waveguide 30 is disposed on the first optical path, and a first polarizer 40 is disposed on the transmission path of the first waveguide 30, and the first polarizer 40 can filter out and emit linearly polarized light having the first polarization state to the left eye;

[0047] The second waveguide 50 is disposed on the second optical path. A second polarizer 60 is disposed on the transmission path of the second waveguide 50. The second polarizer 60 can filter out and emit linearly polarized light having the second polarization state to the right eye.

[0048] In this embodiment, the display device 100 includes a display component 10, a light splitting component 20, a first waveguide 30, and a second waveguide 50. The light beam emitted by the display component 10 can be split into two beams by the light splitting component 20, and one of the light beams is transmitted to the first waveguide 30 along a first optical path, and the other light beam is transmitted to the second waveguide 50 along a second optical path. The display component 10 can periodically and alternately emit linearly polarized light having a first polarization state and a second polarization state. A first polarizer 40 is provided on the transmission path of the first waveguide 30, and a second polarizer 60 is provided on the transmission path of the second waveguide 50. Both the first polarizer 40 and the second polarizer 60 have polarization selection characteristics, and can screen out linearly polarized light having a specific polarization state. In this way, when the linearly polarized light having a first polarization state emitted by the display component 10 is split into two beams under the action of the light splitting component 20 and transmitted to the first polarizer 40 and the second polarizer 60 respectively, the linearly polarized light having a first polarization state is selected. The linear polarized light with the second polarization state can only pass through the first polarizer 40 and be emitted to the left eye. Similarly, when the linear polarized light with the second polarization state emitted by the display component 10 is divided into two beams under the action of the splitter component 20 and transmitted to the first polarizer 40 and the second polarizer 60 respectively, the linear polarized light with the second polarization state can only pass through the second polarizer 60 and be emitted to the right eye. In this way, the left and right eyes can respectively receive the linear polarized light with the first polarization state and the linear polarized light with the second polarization state, so that the stereoscopic display effect can be realized by utilizing the human eye's visual persistence mechanism, and a better augmented reality experience can be achieved.

[0049] Furthermore, a collimating lens is provided on the light output path of the display component 10, which can collimate the light emitted by the display component 10, so that the light beam emitted by the display component 10 is transmitted to the light splitting component 20 in the form of parallel light, thereby ensuring the accuracy of optical signal transmission.

[0050] Please refer to Figure 1 In some embodiments of the display device 100 of the present invention, the display component 10 includes:

[0051] An optical machine 11, wherein the optical machine 11 is used to periodically and alternately emit a first image and a second image, wherein both the first image and the second image are circularly polarized light; and

[0052] A quarter wave plate 12, wherein the quarter wave plate 12 is movably disposed on the light output path of the optical machine 11 and has a first state and a second state, and the quarter wave plate 12 periodically switches between the first state and the second state;

[0053] When the quarter wave plate 12 is in the first state, it can convert the first image into the linear polarized light having the first polarization state. When the quarter wave plate 12 is in the second state, it can convert the second image into the linear polarized light having the second polarization state.

[0054] In this embodiment, the display component 10 includes an optical machine 11 and a quarter-wave plate 12. The optical machine 11 is used to periodically alternately emit a first image and a second image. The first image and the second image are both circularly polarized light. The circularly polarized light can be set to left-handed polarized light or right-handed polarized light. The quarter-wave plate 12 can be movably arranged on the light output path of the optical machine 11, and has a first state and a second state, and can be periodically alternately switched between the first state and the second state to periodically alternately emit linearly polarized light having a first polarization state and linearly polarized light having a second polarization state.

[0055] Specifically, the fast axis direction of the quarter wave plate 12 in the first state is recorded as the x-direction, and the slow axis direction of the quarter wave plate is recorded as the y-direction. At this time, if the incident circularly polarized light is right-handed polarized light, the output light passing through the quarter wave plate 12 is linearly polarized light with a first polarization state, and the light vector of the linear polarized light with the first polarization state is 45° to the x-axis; if the incident circularly polarized light is left-handed polarized light, the output light passing through the quarter wave plate 12 is linearly polarized light with a second polarization state, and the light vector of the linear polarized light with the second polarization state is -45° to the x-axis.

[0056] When the quarter wave plate 12 is transformed from the first state to the second state, the fast axis direction of the quarter wave plate 12 is parallel to the y direction, and the slow axis direction of the quarter wave plate 12 is parallel to the x direction. At this time, if the incident circularly polarized light is right-handed polarized light, the outgoing light passing through the quarter wave plate 12 is linearly polarized light with a second polarization state, and the light vector of the linear polarized light with the second polarization state is -45° to the x-axis; if the incident circularly polarized light is left-handed polarized light, the outgoing light passing through the quarter wave plate 12 is linearly polarized light with a first polarization state, and the light vector of the linear polarized light with the first polarization state is 45° to the x-axis.

[0057] Therefore, when the polarization direction of the circularly polarized light emitted by the optical machine 11 remains unchanged, by alternately switching the quarter-wave plate 12 between the first state and the second state, the function of alternately converting the circularly polarized light into linearly polarized light having the first polarization state and the second polarization state can be achieved.

[0058] In some embodiments of the display device 100 of the present invention, the quarter wave plate 12 is rotatable along a first direction, and the first direction is perpendicular to the transmission direction of the output light of the optical engine 11 .

[0059] In this embodiment, the quarter wave plate 12 is rotatable along a first direction, and the first direction is perpendicular to the transmission direction of the output light of the optical machine 11. In this way, the quarter wave plate 12 can be quickly switched between the first state and the second state by rotating, so as to convert the incident circularly polarized light into linearly polarized light with a first polarization state and linearly polarized light with a second polarization state, respectively.

[0060] In some embodiments of the display device 100 of the present invention, the frequency at which the optical engine 11 alternately emits the first image and the second image is an integer multiple of 120 Hz.

[0061] In this embodiment, the frequency of the optical machine 11 alternately emitting the first image and the second image is an integer multiple of 120 Hz, that is, it can be set to 120 Hz, 240 Hz, 360 Hz, etc. The specific implementation method can be set according to actual needs and is not limited here.

[0062] Please refer to Figure 2 In some embodiments of the display device 100 of the present invention, the light splitting component 20 includes:

[0063] A fixed structure 21, wherein the fixed structure 21 has a light incident surface and a light emitting surface that are arranged opposite to each other, the light incident surface is arranged toward the display device 100, and the light emitting surface has a first light emitting area and a second light emitting area that are arranged at intervals, the first light emitting area is arranged corresponding to the first light path, and the second light emitting area is arranged corresponding to the second light path;

[0064] A light splitting mechanism 22, which is disposed on the fixed structure 21 and corresponds to the light incident surface, and is used to receive incident light vertically incident on the light incident surface, and split the incident light into a first light beam and a second light beam that are transmitted in opposite directions in a horizontal direction;

[0065] a first emitting mechanism 23, which is disposed on the fixed structure 21 and located on the transmission path of the first light beam, and is used to receive the first light beam and vertically reflect the first light beam to the first light emitting area, so that the first light beam is transmitted along the first light path; and

[0066] The second emitting mechanism 24 is arranged on the fixed structure 21 and is located on the transmission path of the second light beam. The first emitting mechanism 23 is used to receive the second light beam and vertically reflect the second light beam to the second light emitting area so that the second light beam is transmitted along the second light path.

[0067] In this embodiment, the fixed structure 21 is used to encapsulate a splitting mechanism 22, a first emitting mechanism 23 and a second emitting mechanism 24, wherein the splitting mechanism 22 is arranged corresponding to the light incident surface of the fixed structure 21, and the light beam emitted by the display screen is transmitted to the light incident surface in the form of parallel light, and is decomposed by the splitting mechanism 22 into a first light beam and a second light beam transmitted in opposite directions along a horizontal direction, and the first emitting mechanism 23 and the second emitting mechanism 24 are respectively located on the transmission paths of the first light beam and the second light beam, and are used to vertically reflect the first light beam and the second light beam to the first light exit area and the second light exit area on the light exit surface of the fixed structure 21, respectively. In this way, the first light beam and the second light beam can be transmitted to the first waveguide 30 and the second waveguide 50 in the form of parallel light, respectively.

[0068] In one embodiment, the first output mechanism 23 may be configured as a reflective film, and the reflective film is arranged at an angle of 45° to the light incident surface, thereby realizing the vertical reflection function of the first output mechanism 23. Similarly, the second output mechanism 24 may be configured as a reflective film, and the reflective film is arranged at an angle of 135° to the light incident surface, thereby realizing the vertical reflection function of the second output mechanism 24. Of course, the first output mechanism 23 and the second output mechanism 24 may also be configured as semi-reflective and semi-transmissive films, which are not limited here.

[0069] Please refer to 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 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 linearly polarized light transmitted along the first optical path, and the first coupling-out region 33 and the first coupling-in region 32 are provided at intervals;

[0070] The first polarizer 40 is disposed upstream of the first coupling-in region 32 . The transmission polarization direction of the first polarizer 40 is the same as the polarization direction of the linearly polarized light with the first polarization state, and is used to transmit the linearly polarized light with the first polarization state.

[0071] 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 linearly polarized light 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.

[0072] In addition, a first polarizer 40 is further provided on the transmission path of the first waveguide 30. The transmission polarization direction of the first polarizer 40 is the same as the polarization direction of the linear polarized light having the first polarization state, and is used to transmit the linear polarized light having the first polarization state, so as to play a role in screening the linear polarized light emitted by the display component 10. In one embodiment, the first polarizer 40 is provided upstream of the first coupling-in region 32, and is used to screen the linear polarized light coupled into the first waveguide 30 into the linear polarized light having the first polarization state; in another embodiment, the first polarizer 40 is provided downstream of the first coupling-out region 33, and is used to screen the linear polarized light coupled out of the first waveguide 30 into the linear polarized light having the first polarization state, so that the linear polarized light having the first polarization state is transmitted to the left eye, which is not limited here.

[0073] In some embodiments of the display device 100 of the present invention, the first polarizer 40 is attached to the first waveguide 30 .

[0074] In this embodiment, the first polarizer 40 may be an independently arranged optical element and attached to the surface of the first waveguide 30. The first polarizer 40 may also be set as a film layer plated or attached to the surface of the first waveguide 30. In this way, the first polarizer 40 and the first waveguide 30 may be arranged compactly, which is beneficial to reducing the occupied space of the display device 100. The first polarizer 40 may be attached to the first coupling-in region 32 of the first waveguide 30, or to the first coupling-out region 33 of the first waveguide 30, which is not limited here.

[0075] Please refer to 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 provided on the second substrate 51, the second coupling-in region 52 is provided corresponding to the first optical path and is used to receive the linearly polarized light transmitted along the first optical path, and the second coupling-out region 53 and the second coupling-in region 52 are provided at intervals;

[0076] The second polarizer 60 is disposed upstream of the second coupling-in region 52 . The transmission polarization direction of the second polarizer 60 is the same as the polarization direction of the linearly polarized light with the first polarization state, and is used to transmit the linearly polarized light with the second polarization state.

[0077] 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 linearly polarized light transmitted along the second optical path. The second coupling-out region 53 and the second coupling-in region 52 are provided at intervals. 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.

[0078] In addition, a second polarizer 60 is further provided on the transmission path of the second waveguide 50. The transmission polarization direction of the second polarizer 60 is the same as the polarization direction of the linear polarized light having the second polarization state, and is used to transmit the linear polarized light having the second polarization state, so as to play a role in screening the linear polarized light emitted by the display component 10. In one embodiment, the second polarizer 60 is provided upstream of the second coupling-in region 52, and is used to screen the linear polarized light coupled into the second waveguide 50 into the linear polarized light having the second polarization state; in another embodiment, the second polarizer 60 is provided downstream of the second coupling-out region 53, and is used to convert the linear polarized light coupled out of the second waveguide 50 into the linear polarized light having the second polarization state, so that the linear polarized light having the second polarization state is transmitted to the left eye, which is not limited here.

[0079] In some embodiments of the display device 100 of the present invention, the second polarizer 60 is attached to the first waveguide 30 .

[0080] In this embodiment, the second polarizer 60 may be an independently arranged optical element and attached to the surface of the second waveguide 50. The second polarizer 60 may also be arranged as a film layer plated or attached to the surface of the second waveguide 50. In this way, the second polarizer 60 and the second waveguide 50 may be arranged compactly, which is beneficial to reducing the occupied space of the display device 100. The second polarizer 60 may be attached to the second coupling-in region 52 of the second waveguide 50, or to the second coupling-out region 53 of the second waveguide 50, which is not limited here.

[0081] The present invention further provides 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.

[0082] 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 component, wherein the display component periodically and alternately emits linearly polarized light having a first polarization state and a second polarization state, wherein the first polarization state and the second polarization state are arranged orthogonally; A light splitting component, which is arranged on the light output path of the display component and is used to split the incident linearly polarized light into two beams, and transmit them 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, a first polarizer is disposed on the transmission path of the first waveguide, and the first polarizer can filter out and emit linearly polarized light having the first polarization state to the left eye; as well as A second waveguide is arranged on the second optical path. A second polarizer is arranged on the transmission path of the second waveguide. The second polarizer can filter out and emit linearly polarized light having the second polarization state to the right eye.

2. The display device according to claim 1, wherein: The display assembly comprises: An optical machine, the optical machine is used to periodically and alternately emit a first image and a second image, wherein the first image and the second image are both circularly polarized light; and A quarter wave plate, which is movably disposed on the light output path of the optical machine and has a first state and a second state, and the quarter wave plate periodically switches between the first state and the second state; When the quarter wave plate is in the first state, it can convert the first image into the linear polarized light with the first polarization state. When the quarter wave plate is in the second state, it can convert the second image into the linear polarized light with the second polarization state.

3. The display device according to claim 2, wherein: The quarter wave plate is rotatably arranged along a first direction, and the first direction is perpendicular to the transmission direction of the output light of the optical machine.

4. The display device according to claim 2, wherein: The frequency at which the optical machine alternately emits the first image and the second image is an integer multiple of 120 Hz.

5. The display device according to any one of claims 1 to 4, characterized in that: The light splitting component comprises: A fixed structure, the fixed structure having a light incident surface and a light emitting surface arranged in opposite directions, the light incident surface is arranged toward the display device, the light emitting surface has a first light emitting area and a second light emitting area arranged at intervals, the first light emitting area is arranged corresponding to the first light path, and the second light emitting area is arranged corresponding to the second light path; A light splitting mechanism, which is disposed on the fixed structure and corresponding to the light incident surface, and is used to receive incident light vertically incident on the light incident surface, and decompose the incident light into a first light beam and a second light beam that are transmitted in opposite directions in a horizontal direction; a first emitting mechanism, which is disposed on the fixed structure and located on a transmission path of the first light beam, and is used to receive the first light beam and vertically reflect the first light beam to the first light exiting area, so that the first light beam is transmitted along the first light path; and The second emitting mechanism is arranged on the fixed structure and is located on the transmission path of the second light beam. The first emitting mechanism is used to receive the second light beam and vertically reflect the second light beam to the second light exit area so that the second light beam is transmitted along the second light path.

6. The display device according to any one of claims 1 to 4, characterized in that: The first waveguide comprises 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 is used to receive the linearly polarized light transmitted along the first optical path, and the first coupling-out region and the first coupling-in region are arranged at intervals; The first polarizer is disposed upstream of the first coupling-in region. The transmission polarization direction of the first polarizer is the same as the polarization direction of the linear polarized light with the first polarization state, and is used to transmit the linear polarized light with the first polarization state.

7. The display device according to claim 6, wherein: The first polarizer is attached to the first waveguide.

8. The display device according to any one of claims 1 to 4, characterized in that: The second waveguide comprises 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 first optical path and is used to receive the linearly polarized light transmitted along the first optical path, and the second coupling-out region and the second coupling-in region are provided at intervals; The second polarizer is disposed upstream of the second coupling-in region. The transmission polarization direction of the second polarizer is the same as the polarization direction of the linear polarized light with the first polarization state, and is used to transmit the linear polarized light with the second polarization state.

9. The display device according to claim 8, wherein: The second polarizer is attached to the first waveguide.

10. An augmented reality display device, characterized in that: Comprising the display device according to any one of claims 1 to 7.

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