Display device and display equipment
By using the first reflector to replace the reflective polarization film in the display device, the problem that the orange peel effect caused by the reflective polarization film affects the sharpness of the virtual image is solved, and the combination of high light efficiency and low cost is achieved, improving the clearness of the virtual image is reduced. The cost of the whole machine.
Patent Information
- Application Number
- CN202411524044.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-29
- Publication Date
- 2024-12-27
AI Technical Summary
In the prior art, the orange peel effect caused by the reflective polarization film affects the clarity of the virtual image, while the improved reflective polarization film is expensive, resulting in no advantage in the overall machine cost, and it is difficult to achieve a balance between high light efficiency and low cost.
The first reflector is used instead of the reflective polarization film, and is arranged on the light exit side of the display screen and is located outside the main light axis. The light is reflected through the first reflector to the second reflector, and the light is passed through the viewing window to achieve high light efficiency and low light efficiency. Combination of costs.
It improves the reflectivity and utilization of light, reduces internal light interference, improves the clarity of virtual images, and reduces the cost of the whole machine.
Smart Images
Figure CN119200187A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of display technology, and in particular to a display device and a display equipment. Background Art
[0002] In the patent document entitled Optical System and Imaging Device with the patent publication number CN117215072A, it is proposed to use a non-polarizing beam splitter film as a reflective polarizing film to achieve light folding and high light efficiency through the conversion characteristics of the polarization state of the imaging light path. The general reflective polarizing film (such as DEBF) used in this solution has obvious orange peel, which seriously affects the clarity of the virtual image, and the orange peel improved reflective polarizing film (such as IQPS and IQPE) is expensive, resulting in no cost advantage for the whole machine. Summary of the invention
[0003] The embodiments of the present application provide a display device and a display apparatus, which can have high light efficiency while meeting the requirements of low cost of the whole machine and high virtual image clarity.
[0004] On the one hand, an embodiment of the present application provides a display device having a principal light axis, the display device comprising: a display screen, a first reflector, a second reflector, and a window;
[0005] On the main light axis, the window and the second reflector are arranged at intervals; the first reflector is located on the light exit side of the display screen and is arranged outside the main light axis;
[0006] The first reflector is configured to reflect the light emitted from the display screen to the second reflector, and the second reflector is configured to reflect the light reflected by the first reflector and allow the light to pass through the viewing window.
[0007] Optionally, in some embodiments of the present application, in the central field of view of the display device, the optical path of the first reflector and the second reflector is between 100 mm and 200 mm.
[0008] Optionally, in some embodiments of the present application, a direction parallel to the principal light axis is a first direction, and in the first direction, a distance from a center of the window to a center of the second reflector is between 50 mm and 150 mm.
[0009] Optionally, in some embodiments of the present application, the thickness direction of the display device is a second direction, the second direction is perpendicular to the first direction, and the first reflector and the display screen are located above the window;
[0010] Based on the second direction, the central axis of the display screen deflects clockwise by a first angle, the central axis of the first reflector deflects clockwise by a second angle, and the central axis of the second reflector deflects counterclockwise by a third angle;
[0011] The first angle is between 10 degrees and 40 degrees, the second angle is between 10 degrees and 20 degrees, and the third angle is between 10 degrees and 30 degrees.
[0012] Optionally, in some embodiments of the present application, the thickness direction of the display device is a second direction, the second direction is perpendicular to the first direction, and the first reflector and the display screen are located below the window;
[0013] Based on the second direction, the central axis of the display screen is deflected counterclockwise by a first angle, the central axis of the first reflector is deflected counterclockwise by a second angle, and the central axis of the second reflector is deflected clockwise by a third angle;
[0014] The first angle is between 10 degrees and 40 degrees, the second angle is between 10 degrees and 20 degrees, and the third angle is between 10 degrees and 30 degrees.
[0015] Optionally, in some embodiments of the present application, in the first direction, the distance from the center of the window to the center of the first reflector is less than or equal to 20 mm.
[0016] Optionally, in some embodiments of the present application, in the second direction, the distance from the center of the window to the center of the first reflector is between 10 mm and 20 mm.
[0017] Optionally, in some embodiments of the present application, the display screen includes a display panel and a first polarizer arranged on the light-emitting side of the display panel, and the window includes a second polarizer, which is a circular polarizer.
[0018] Optionally, in some embodiments of the present application, the first polarizer includes a first linear polarizing layer and a first quarter wave plate, the first quarter wave plate is located on a side of the first linear polarizing layer away from the display panel, and an angle between an absorption axis of the first linear polarizing layer and a slow axis of the first quarter wave plate is 45 degrees;
[0019] The second polarizer includes a second linear polarizing layer and a second quarter wave plate, and the second quarter wave plate is located on a side of the second linear polarizing layer close to the second reflector;
[0020] The absorption axis of the second linear polarizing layer is perpendicular to the absorption axis of the first linear polarizing layer, and the slow axis of the second quarter wave plate is parallel to the slow axis of the first quarter wave plate; or, the absorption axis of the second linear polarizing layer is parallel to the absorption axis of the first linear polarizing layer, and the slow axis of the second quarter wave plate is perpendicular to the slow axis of the first quarter wave plate.
[0021] Optionally, in some embodiments of the present application, the first polarizer is a linear polarizer, the second polarizer includes a second linear polarizer layer and a second quarter-wave plate, and the second quarter-wave plate is located on a side of the second linear polarizer layer close to the second reflector;
[0022] The fast axis of the second quarter wave plate is perpendicular or parallel to the transmission axis of the first polarizer. The second quarter wave plate is configured to transmit light parallel to the polarization direction of the first polarizer. The transmission axis of the second linear polarizing layer is parallel to the transmission axis of the first polarizer.
[0023] On the other hand, accordingly, an embodiment of the present application further provides a display device, which includes the display apparatus as described in any one of the above embodiments.
[0024] The display device of the embodiment of the present application has a principal light axis, and includes: a display screen, a first reflector, a second reflector and a window; on the principal light axis, the window and the second reflector are arranged at intervals; the first reflector is located on the light emitting side of the display screen and is arranged outside the principal light axis; the first reflector is configured to reflect the light emitted by the display screen to the second reflector, and the second reflector is configured to reflect the light reflected by the first reflector and allow the light to pass through the window.
[0025] Among them, the display device of the embodiment of the present application adopts a first reflector to replace the reflective polarizing film, and sets the first reflector outside the main light axis, which not only achieves the effect of high light efficiency but also meets the requirements of low cost and high definition. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 is a schematic diagram of the structure of a display device provided in an embodiment of the present application;
[0027] Figure 2 is another structural schematic diagram of a display device provided in an embodiment of the present application;
[0028] Figure 3 is a schematic diagram of the structure of light conversion of a display device provided in an embodiment of the present application;
[0029] Figure 4is another structural schematic diagram of light conversion of a display device provided in an embodiment of the present application;
[0030] Figure 5 It is a schematic diagram of the structure of the display device provided in an embodiment of the present application. DETAILED DESCRIPTION
[0031] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, the various embodiments can be combined with each other but will not be repeated one by one, and in the absence of contrary instructions, the directional words used, such as "upper" and "lower", usually refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the drawings; while "inside" and "outside" refer to the outline of the device; the terms "first", "second", "third", etc. are used only as markings, and no numerical requirements are imposed or order is established.
[0032] The embodiments of the present application provide a display device and a display apparatus, which are described in detail below. It should be noted that the description order of the following embodiments is not intended to limit the preferred order of the embodiments.
[0033] Please refer to Figure 1 The embodiment of the present application provides a display device 100 having a principal light axis zz. The display device 100 includes a display screen 11 , a first reflector 12 , a second reflector 13 and a window 14 .
[0034] On the main light axis zz, the windows 14 and the second reflectors 13 are arranged at intervals. The first reflector 12 is located on the light exit side of the display screen 11 and is arranged outside the main light axis zz.
[0035] The first reflector 12 is configured to reflect the light emitted from the display screen 11 to the second reflector 13. The second reflector 13 is configured to reflect the light reflected by the first reflector 12 and allow the light to pass through the viewing window 14.
[0036] Compared with the technical solutions of the background technology, the reflectivity of the non-polarized splitter film is generally in the range of 15% to 85%. In fact, a large part of the light emitted by the image source will directly pass through the light-splitting and light-combining elements to illuminate the structural parts. The reflectivity of the more mature light-absorbing structures on current products is generally between 1% and 5%. Therefore, a large part of the light will still be reflected and become internal stray light that affects the imaging effect.
[0037] It should be understood that the principal ray axis zz is the ray direction within the luminous viewing angle range of the display device 200 and coincides with the virtual line connecting the center of the window 14 and the center of the second reflector 13. When the human eye is located in the principal ray axis zz, the human eye has the best viewing angle.
[0038] The display device 100 of the embodiment of the present application adopts the first reflector 12 to replace the non-polarizing splitter film. Based on the reflectivity of the first reflector 12 being greater than 85%, the first reflector 12 is arranged outside the main light axis zz, thereby improving the integrity and utilization of the light emitted by the reflective display screen and reducing the risk of internal light interference; secondly, compared with the general reflective polarizing film solution, the present application improves the clarity of the virtual image; compared with the orange peel improved reflective polarizing film, the embodiment of the present application can reduce the cost.
[0039] Optionally, the display screen 11 includes a display panel 111 and a first polarizer 112 disposed on a light-emitting side of the display panel 111 .
[0040] Optionally, the display panel 111 may be a panel with a display function selected from a liquid crystal panel, an organic light emitting diode panel, a sub-millimeter light emitting diode panel, a micro light emitting diode panel, a quantum dot light emitting diode panel or an electrophoretic panel.
[0041] Secondly, the first polarizer 112 can be a circular polarizer or a linear polarizer.
[0042] Optionally, the reflection surface of the first reflection mirror 12 and the reflection surface of the second reflection mirror 13 may each be one of a plane, a spherical surface, a cylindrical surface, a biconical surface and a free-form surface.
[0043] Optionally, the central axis of the window 14 is perpendicular to the principal light axis zz, but is not limited thereto. For example, the central axis of the window 14 may be non-perpendicular to the principal light axis zz.
[0044] It is understood that the distance between the human eye and the window 14 is generally between 300 mm and 500 mm, such as 300 mm, 350 mm, 400 mm, 450 mm or 500 mm, but not limited thereto. For example, the distance between the human eye and the window 14 may be greater than 500 mm according to requirements.
[0045] Optionally, in some embodiments of the present application, the direction parallel to the principal light axis zz is the first direction F1. In the first direction F1, the distance from the center of the window 14 to the center of the second reflector 13 is between 50 mm and 150 mm, for example, 50 mm, 60 mm, 70 mm, 80 mm, 90 mm, 100 mm, 110 mm, 120 mm, 130 mm, 140 mm or 150 mm.
[0046] Optionally, in some embodiments of the present application, in the central field of view of the display device 100, the optical path of the first reflector 12 and the second reflector 13 is between 100 mm and 200 mm, for example, it can be 100 mm, 110 mm, 120 mm, 130 mm, 140 mm, 150 mm, 160 mm, 170 mm, 180 mm, 190 mm or 200 mm.
[0047] It should be understood that the central field of view of the display device 100 refers to the viewing angle of the human eye corresponding to the center of the virtual image when the human eye is at the center of the display device 100.
[0048] Optionally, in some embodiments of the present application, the thickness direction of the display device 100 is the second direction F2 , and the second direction F2 is perpendicular to the first direction F1 . The first reflector 12 and the display screen 11 are located above the window 14 .
[0049] Based on the second direction F2, the central axis of the display screen 11 deflects by a first angle a1 clockwise, the central axis of the first reflector 12 deflects by a second angle a2 clockwise, and the central axis of the second reflector 13 deflects by a third angle a3 counterclockwise.
[0050] The first angle a1 is between 10 and 40 degrees, such as 10, 15, 20, 25, 30, 35 or 40 degrees. The second angle a2 is between 10 and 20 degrees, such as 10, 15 or 20 degrees. The third angle a3 is between 10 and 30 degrees, such as 10, 15, 20, 25 or 30 degrees.
[0051] Optionally, in some embodiments of the present application, such as Figure 2 As shown, the first reflector 12 and the display screen 11 are located below the viewing window 14 .
[0052] Based on the second direction F2, the central axis of the display screen 11 deflects counterclockwise by a first angle a1, the central axis of the first reflector 12 deflects counterclockwise by a second angle a2, and the central axis of the second reflector 13 deflects clockwise by a third angle a3.
[0053] The first angle a1 is between 10 and 40 degrees, such as 10, 15, 20, 25, 30, 35 or 40 degrees. The second angle a2 is between 10 and 20 degrees, such as 10, 15 or 20 degrees. The third angle a3 is between 10 and 30 degrees, such as 10, 15, 20, 25 or 30 degrees.
[0054] It is understandable that the viewing quality of the virtual image is improved by coordinated adjustment based on the distance from the center of the window 14 to the center of the second reflector 13, the optical path of the first reflector 12 and the second reflector 13, the first angle a1, the second angle a2 and the third angle a3.
[0055] In addition, based on the setting of the first reflector 12, the first angle a1 of the display screen 11 is smaller, which can reduce the space in the first direction F1; and the second angle a2 of the first reflector 12 is smaller than the first angle a1, which further reduces the space of the first reflector 12 in the first direction F1.
[0056] Optionally, the second angle a2 is less than or equal to half of the first angle a1, and in the second direction F2, the window 14 and the first reflector 12 at least partially overlap to further reduce the occupied space.
[0057] Optionally, in some embodiments of the present application, in the first direction F1, the distance from the center of the window 14 to the center of the first reflector 12 is less than or equal to 20 mm, for example, 0 mm, 5 mm, 10 mm, 15 mm or 20 mm.
[0058] Since the first reflector 12 is tilted, even if the center of the window 14 and the center of the first reflector 12 are offset, the first reflector 12 can fully cover the window 14 in the second direction F2 to save space.
[0059] Optionally, in some embodiments of the present application, in the second direction F2, the distance from the center of the window 14 to the center of the first reflector 12 is between 10 mm and 20 mm.
[0060] It is understandable that, based on the requirements of processing and assembly and considering reducing the volume of the display device 100, the distance from the center of the first reflector 12 to the center of the window 14 is set between 10 mm and 20 mm, for example, it can be 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm or 20 mm.
[0061] Optionally, in some embodiments of the present application, the window 14 includes a second polarizer 15. The second polarizer 15 is a circular polarizer.
[0062] Among them, a circular polarizer is arranged on the window 14 to reduce the influence of external stray light on the interior of the display device 100 .
[0063] Optionally, the window 14 includes a transparent substrate 141 , and the second polarizer 15 is disposed on a side of the transparent substrate 141 close to the second reflector 13 .
[0064] The second polarizer 15 is disposed on a side of the transparent substrate 141 close to the second reflector 13 , so that the transparent substrate 141 can protect the second polarizer 15 and avoid the risk of the second polarizer 15 being scratched or collided by external objects.
[0065] Optionally, in some embodiments, the second polarizer 15 may also be disposed on a side of the transparent substrate 141 away from the second reflector 13 .
[0066] Optionally, the transparent substrate 141 may be a light-transmitting material, for example, a hard material such as glass.
[0067] Optionally, the second polarizer 15 includes a second linear polarizer layer 15 a and a second quarter wave plate 15 b , and the second quarter wave plate 15 b is located on a side of the second linear polarizer layer 15 a close to the second reflector 13 .
[0068] It can be understood that the second linear polarizing layer 15a and the second quarter wave plate 15b are both arranged on the side of the transparent substrate 141 close to the second reflector 13, but it is not limited thereto. For example, the second linear polarizing layer 15a and the second quarter wave plate 15b can be both arranged on the side of the transparent substrate 141 away from the second reflector 13; or the second quarter wave plate 15b can be arranged on the side of the transparent substrate 141 close to the second reflector 13, and the second linear polarizing layer 15a can be arranged on the side of the transparent substrate 141 away from the second reflector 13.
[0069] Optionally, in some embodiments of the present application, such as Figure 3 As shown, the first polarizer 112 includes a first linear polarizer layer 11a and a first quarter wave plate 11b. The first quarter wave plate 11b is located on a side of the first linear polarizer layer 11a away from the display panel 111. The angle between the absorption axis of the first linear polarizer layer 11a and the slow axis of the first quarter wave plate 11b is 45 degrees.
[0070] The absorption axis of the second linear polarizing layer 15a is perpendicular to the absorption axis of the first linear polarizing layer 11a, and the slow axis of the second quarter wave plate 15b is parallel to the slow axis of the first quarter wave plate 11b; or, the absorption axis of the second linear polarizing layer 15a is parallel to the absorption axis of the first linear polarizing layer 11a, and the slow axis of the second quarter wave plate 15b is perpendicular to the slow axis of the first quarter wave plate 11b.
[0071] like Figure 3As shown, the light emitted by the display panel 111 passes through the first linear polarization layer 11a, the first quarter wave plate 11b, the second quarter wave plate 15b, and the second linear polarization layer 15a in sequence. Among them, the light is converted into circular polarization after passing through the first linear polarization layer 11a and the first quarter wave plate 11b, and the circular polarization is converted into linear polarization after passing through the second quarter wave plate 15b. The polarization direction of the linear polarization is parallel or perpendicular to the transmission axis direction of the first linear polarization layer 11a, and the polarization direction of the linear polarization is the same as the transmission axis direction of the second linear polarization layer 15a. The second quarter wave plate 15b and the second linear polarization layer 15a can reduce the interference of ambient light and achieve the effect of the cavity being close to an optical black body in the screen-off state.
[0072] Optionally, in some embodiments of the present application, such as Figure 4 As shown, the first polarizer 112 is a linear polarizer. The fast axis of the second quarter wave plate 15b is perpendicular or parallel to the transmission axis of the first polarizer 112, and the second quarter wave plate 15b is configured to transmit light parallel to the polarization direction of the first polarizer 112, and the transmission axis of the second linear polarizer 15a is parallel to the transmission axis of the first polarizer 112.
[0073] Please refer to Figure 4 , the light emitted by the display panel 111 passes through the first polarizer 112, the second quarter wave plate 15b and the second linear polarization layer 15a in sequence. Among them, the light is converted into linear polarization after passing through the first polarizer 112, and the linear polarization is still linear polarization after passing through the second quarter wave plate 15b. The polarization direction of the linear polarization is parallel to the transmission axis direction of the first polarizer 112, and the polarization direction of the linear polarization is the same as the transmission axis direction of the second linear polarization layer 15a. The second quarter wave plate 15b and the second linear polarization layer 15a can reduce the interference of ambient light and achieve the effect of the cavity being close to an optical black body in the screen-off state.
[0074] Figure 4 The corresponding embodiment is compared with Figure 3 In the corresponding embodiment, the first quarter wave plate 11 b is saved.
[0075] It should be noted that the following tables 1 and 2 are based on Figure 1 and Figure 3 Comparative data of imaging spot and field curvature performance of the display device 100 of the corresponding embodiment and the optical architecture of FIG. 7 in the patent document of the background technology under the same optical design parameters (viewing distance of 300 mm, field of view angle range of 31 degrees * 17 degrees, display screen of 5 inches).
[0076]
[0077]
[0078] It can be seen from the data in Table 1 and Table 2 that the size of the imaging spot of the display device 100 of the embodiment of the present application is comparable to that of the imaging spot of the background technology, and the field curvature performance of the display device 100 of the embodiment of the present application is slightly better than that of the background technology.
[0079] It is important to understand that the smaller the imaging spot, the smaller the aberration of the optical system, and the clearer the image. A small field curvature value means that the optimal virtual image distance position deviation of each observation field is small, and the human eye does not need to make multiple large-scale adaptive adjustments to the clearest position when viewing the entire picture, similar to a TV being close to a flat surface.
[0080] Please refer to Figure 5 , an embodiment of the present application further provides a display device 1000, which includes the display apparatus 100 as described in any one of the above embodiments.
[0081] It should be noted that the display device 100 of the display apparatus 1000 of the embodiment of the present application has a structure similar to or the same as that of the display device 100 of any of the above embodiments, and therefore will not be described in detail herein.
[0082] The display device 100 of the display apparatus 1000 of the embodiment of the present application has a principal light axis zz. The display device 100 includes a display screen 11, a first reflector 12, a second reflector 13 and a window 14. On the principal light axis zz, the window 14 and the second reflector 13 are arranged at intervals. The first reflector 12 is located on the light-emitting side of the display screen 11 and is arranged outside the principal light axis zz. The first reflector 12 is configured to reflect the light emitted by the display screen 11 to the second reflector 13, and the second reflector 13 is configured to reflect the reflected light of the first reflector 12 and allow the light to pass through the window 14.
[0083] Among them, the display device 1000 of the embodiment of the present application adopts the first reflector 12 to replace the reflective polarizing film, and sets the first reflector 12 outside the main light axis zz, which not only achieves the effect of high light efficiency but also meets the requirements of low cost and high definition.
[0084] The above is a detailed introduction to a display device and a display equipment provided in the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea. At the same time, for technical personnel in this field, according to the idea of the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.
Claims
1. A display device having a principal light axis, characterized in that: include: A display screen, a first reflector, a second reflector and a window; On the principal light axis, the viewing window and the second reflector are arranged at intervals; The first reflector is located at the light exiting side of the display screen and is arranged outside the main light axis; The first reflector is configured to reflect the light emitted from the display screen to the second reflector, and the second reflector is configured to reflect the light reflected by the first reflector and allow the light to pass through the window.
2. The display device according to claim 1, characterized in that In the central field of view of the display device, the optical path of the first reflector and the second reflector is between 100 mm and 200 mm.
3. The display device according to claim 2, characterized in that: The direction parallel to the principal light axis is a first direction. In the first direction, the distance from the center of the window to the center of the second reflector is between 50 mm and 150 mm.
4. The display device according to claim 3, characterized in that: The thickness direction of the display device is a second direction, the second direction is perpendicular to the first direction, and the first reflector and the display screen are located above the window; Based on the second direction, the central axis of the display screen deflects clockwise by a first angle, the central axis of the first reflector deflects clockwise by a second angle, and the central axis of the second reflector deflects counterclockwise by a third angle; The first angle is between 10 degrees and 40 degrees, the second angle is between 10 degrees and 20 degrees, and the third angle is between 10 degrees and 30 degrees.
5. The display device according to claim 3, characterized in that: The thickness direction of the display device is a second direction, the second direction is perpendicular to the first direction, and the first reflector and the display screen are located below the window; Based on the second direction, the central axis of the display screen is deflected counterclockwise by a first angle, the central axis of the first reflector is deflected counterclockwise by a second angle, and the central axis of the second reflector is deflected clockwise by a third angle; The first angle is between 10 degrees and 40 degrees, the second angle is between 10 degrees and 20 degrees, and the third angle is between 10 degrees and 30 degrees.
6. The display device according to claim 4 or 5, characterized in that: In the first direction, a distance from the center of the window to the center of the first reflector is less than or equal to 20 mm.
7. The display device according to claim 6, characterized in that: In the second direction, a distance from a center of the window to a center of the first reflector is between 10 mm and 20 mm.
8. The display device according to any one of claims 1 to 5, characterized in that: The display screen includes a display panel and a first polarizer arranged on the light-emitting side of the display panel, and the window includes a second polarizer, which is a circular polarizer.
9. The display device according to claim 8, characterized in that: The first polarizer includes a first linear polarizing layer and a first quarter wave plate, wherein the first quarter wave plate is located on a side of the first linear polarizing layer away from the display panel, and an angle between an absorption axis of the first linear polarizing layer and a slow axis of the first quarter wave plate is 45 degrees; The second polarizer includes a second linear polarizing layer and a second quarter wave plate, and the second quarter wave plate is located on a side of the second linear polarizing layer close to the second reflector; The absorption axis of the second linear polarizing layer is perpendicular to the absorption axis of the first linear polarizing layer, and the slow axis of the second quarter wave plate is parallel to the slow axis of the first quarter wave plate; or, the absorption axis of the second linear polarizing layer is parallel to the absorption axis of the first linear polarizing layer, and the slow axis of the second quarter wave plate is perpendicular to the slow axis of the first quarter wave plate.
10. The display device according to claim 8, characterized in that: The first polarizer is a linear polarizer, the second polarizer includes a second linear polarizer layer and a second quarter-wave plate, and the second quarter-wave plate is located on a side of the second linear polarizer layer close to the second reflector; The fast axis of the second quarter wave plate is perpendicular or parallel to the transmission axis of the first polarizer. The second quarter wave plate is configured to transmit light parallel to the polarization direction of the first polarizer. The transmission axis of the second linear polarizing layer is parallel to the transmission axis of the first polarizer.
11. A display device, characterized in that: Comprising the display device as described in any one of claims 1-10.