Display module and display apparatus

Abstract

Provided in the present application are a display module and a display apparatus. The display module comprises a backlight module, a dimming module, and a display panel. When the display module is configured to be in a first display mode, the total amount of light emitted by the dimming module to a first side is equal to the total amount of light emitted by the display module to a second side; and when the display module is configured to be in a second display mode, the total amount of light emitted by the dimming module to the first side is less than the total amount of light emitted by the display module to the second side.

Description

Display module and display device

[0001] This application claims priority to Chinese patent application No. 202410571279.2, filed on May 8, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of displays, and in particular to a display module and display device. Background Technology

[0003] With the development of intelligent vehicles, the application of in-vehicle displays is becoming increasingly common. Currently, the displays in the passenger area are quite large, allowing the driver to directly access their content. This can potentially distract the driver and create safety hazards while driving. Summary of the Invention

[0004] This application provides a display module and display device to improve the light leakage problem in existing liquid crystal display devices.

[0005] This application proposes a display module, the display module including a first side and a second side opposite to each other, the first side and the second side both located on one side of the light emission direction of the display module; wherein, the display module includes:

[0006] Backlight module;

[0007] A dimming module is located on one side of the light emission direction of the backlight module;

[0008] The display panel is located on the side of the dimming module away from the backlight module;

[0009] Specifically, when the display module is configured in the first display mode, the total amount of light emitted by the dimming module to the first side is equal to the total amount of light emitted by the display module to the second side; when the display module is configured in the second display mode, the total amount of light emitted by the dimming module to the first side is less than the total amount of light emitted by the display module to the second side.

[0010] This application also proposes a display device, the display device comprising a display module, the display module including a first side and a second side opposite to each other, the first side and the second side both located on one side of the light emission direction of the display module; wherein, the display module includes:

[0011] Backlight module;

[0012] A dimming module is located on one side of the light emission direction of the backlight module;

[0013] The display panel is located on the side of the dimming module away from the backlight module;

[0014] Wherein, the display module is configured in a first display mode, where the total amount of light emitted by the dimming module to the first side is equal to the total amount of light emitted by the display module to the second side; and the display module is configured in a second display mode, where the total amount of light emitted by the dimming module to the first side is less than the total amount of light emitted by the display module to the second side. Attached Figure Description

[0015] The technical solution and other beneficial effects of this application will become apparent from the following detailed description of specific embodiments in conjunction with the accompanying drawings.

[0016] Figure 1 is a simplified top view of the display module of this application;

[0017] Figure 2 is a first structural diagram of the display module in this application;

[0018] Figure 3 is a detailed diagram of the film layers in Figure 2;

[0019] Figure 4 is a second structural diagram of the display module in this application;

[0020] Figure 5 is a third structural diagram of the display module in this application;

[0021] Figure 6 is a fourth structural diagram of the display module in this application;

[0022] Figure 7 is a fifth structural diagram of the display module in this application;

[0023] Figure 8 is a structural diagram of the structure in Figure 2 when the dimming liquid crystal is deflected;

[0024] Figure 9 is a schematic diagram of the structure in Figure 8 from a 225° perspective.

[0025] Figure 10 is a schematic diagram of the structure in Figure 8 from a 180° perspective.

[0026] Figure 11 is a schematic diagram of the structure in Figure 8 from a 135° perspective. Embodiments of the present invention

[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. Furthermore, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application.

[0028] In the description of this application, it should be understood that the terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0029] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, features defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, and "at least one" can mean one, two, or more, unless otherwise explicitly specified.

[0030] Please refer to Figures 1 to 11. This application proposes a display module 100, which includes a first side and a second side opposite to each other. The first side and the second side are both located on one side of the light emission direction of the display module 100. For example, in the structure of Figure 1, the display module 100 may include a left side, a right side, an upper side, and a lower side. In this application, the first side can be the left side and the second side can be the right side, or the first side can be the upper side and the second side can be the lower side. In the following embodiments, the first side can be the left side and the second side can be the right side as an example for illustration.

[0031] In this embodiment, referring to FIG2, the display module 100 may include a backlight module 300, a dimming module 400, and a display panel 200. The dimming module 400 may be disposed on one side of the backlight module 300 in the light emission direction, and the display panel 200 may be disposed on the side of the dimming module 400 away from the backlight module 300.

[0032] In this embodiment, when the display module 100 is configured in the first display mode, the total amount of light emitted by the dimming module 400 to the first side is equal to the total amount of light emitted by the display module 100 to the second side; when the display module 100 is configured in the second display mode, the total amount of light emitted by the dimming module 400 to the first side is less than the total amount of light emitted by the display module 100 to the second side.

[0033] This application provides a dimming module 400 in the display module 100 to adjust the light emission angle guided from the backlight module 300 to the display panel 200. This makes the total amount of light guided to the first side of the display module 100 less than the total amount of light guided to the second side of the display module 100, which is equivalent to reducing the total amount of light guided to the first side of the display module 100. This prevents the driver located on the first side of the display module 100 from receiving or only receives a small amount of light emitted from the display module 100, thus avoiding interference from the display screen of the display module 100 and ensuring the safety of vehicle operation.

[0034] It should be noted that the first display mode of this application is the conventional display mode, and the second display mode is the single-sided privacy mode.

[0035] The technical solution of this application will now be described in conjunction with specific embodiments.

[0036] Referring to Figure 3, the display panel 200 may include an array substrate 210 and a color filter substrate 220, which are disposed opposite to each other; a liquid crystal layer LC1 is also provided between the array substrate 210 and the color filter substrate 220. The array substrate 210 may be a conventional array substrate or a substrate on which the color filter layer is disposed on the array layer. In the following embodiments, this application uses a conventional array substrate as an example for description.

[0037] Referring to Figure 3, the array substrate 210 may include a first substrate 211 and an array layer 214 located on the first substrate 211. The first substrate 211 may be made of materials such as glass, quartz, or polyimide.

[0038] In this embodiment, the array layer 214 may include multiple thin-film transistors. These thin-film transistors may be etch-block type, back-channel etch type, or classified as bottom-gate thin-film transistors, top-gate thin-film transistors, etc., depending on the position of the gate and active layer 214c. For example, a bottom-gate thin-film transistor may include a gate layer 214a on the first substrate 211, a gate insulating layer 214b on the gate layer 214a, an active layer 214c on the gate insulating layer 214b, a source-drain layer 214d on the active layer 214c, a planarization layer 214e on the source-drain layer 214d, and a pixel electrode layer 214f ​​on the planarization layer 214e.

[0039] In this embodiment, the color filter substrate 220 may include a second substrate 221, a color resist layer 222 located on the second substrate 221, and a common electrode layer 213 disposed on the color resist layer 222. The electric field formed by the common electrode layer 213 and the pixel electrode layer 214f ​​drives the liquid crystal molecules in the liquid crystal layer LC1 to deflect.

[0040] Please refer to Figures 2 and 3. The display module 100 may further include a third polarizer 530 and a fourth polarizer 540 disposed on both sides of the display panel 200. The third polarizer 530 is disposed on the side of the color filter substrate 220 away from the array substrate 210, and the fourth polarizer 540 is disposed on the side of the array substrate 210 away from the color filter substrate 220.

[0041] In this embodiment, since the fourth polarizer 540 is disposed close to the backlight module 300 in the display device 100, and a portion of the backlight module 300 is in contact with the display panel 200, in order to avoid interference between the fourth polarizer 540 and the backlight module 300, the area of ​​the third polarizer 530 in this application can be larger than the area of ​​the fourth polarizer 540, which is equivalent to reducing the area of ​​the fourth polarizer 540.

[0042] In this embodiment, the third polarizer 530 has a third transmission axis 530a, and the fourth polarizer 540 has a fourth transmission axis 540a. The third transmission axis 530a and the fourth transmission axis 540a are perpendicular to each other.

[0043] In this embodiment, the display device 100 may further include a touch layer (not shown) integrated within the display panel 200; for example, the touch layer may be disposed between the fourth polarizer 540 and the first substrate 211, or the touch layer may be disposed between the third polarizer 530 and the second substrate 221.

[0044] In this embodiment, the backlight module 300 can be a direct-lit backlight module 300 or an edge-lit backlight module 300, depending on the position of the light-emitting device. When the backlight module 300 is a direct-lit backlight module 300, the light emitted by the light-emitting device can directly pass through the optical film and enter the display panel 200; when the backlight module 300 is an edge-lit backlight module 300, the light emitted by the light-emitting device is guided by a light guide plate to the optical film and then incident on the display panel 200.

[0045] In this embodiment, the light-emitting device can be an LED, a Mini LED, or a Micro LED, etc. The size of an LED is at the millimeter level, the size of a Mini LED is at the micrometer level, for example, 50 micrometers to 300 micrometers, and the size of a Micro LED is at the nanometer level, for example, less than 10 micrometers.

[0046] Please refer to Figures 2 and 3. In the display module 100 of this application, the display module 100 may further include a first polarizer 510 and a second polarizer 520. The first polarizer 510 is disposed between the backlight module 300 and the dimming module 400, and the second polarizer 520 is disposed between the dimming module 400 and the display panel 200. Meanwhile, the first polarizer 510 has a first transmission axis 510a, and the second polarizer 520 has a second transmission axis 520a. The first transmission axis 510a and the second transmission axis 520a are perpendicular.

[0047] In this embodiment, the angle between the first transmission shaft 510a and the first direction is 125° to 145°, and the angle between the second transmission shaft 520a and the first direction is 35° to 55°. The first direction is the direction from the first side to the second side. For example, the angle between the first transmission shaft 510a and the first direction is 135°, and the angle between the second transmission shaft 520a and the first direction is 45°.

[0048] In the structure of FIG3, the dimming module 400 may include a first substrate 410, a second substrate 420 disposed opposite to the first substrate 410, and a dimming liquid crystal LC2 disposed between the first substrate 410 and the second substrate 420.

[0049] In this embodiment, the first substrate 410 may include a first substrate 411, a first electrode layer 412 disposed on the side of the first substrate 411 away from the first polarizer 510, and a first alignment layer 413 disposed on the side of the first electrode layer 412 away from the first substrate 410; the second substrate 420 may include a second substrate 421, a second electrode layer 422 disposed on the side of the second substrate 421 away from the second polarizer 520, and a second alignment layer 423 disposed on the side of the second electrode layer 422 away from the second substrate 420.

[0050] In this embodiment, the first electrode layer 412 and the second electrode layer 422 can be disposed as a whole to regulate all dimming liquid crystals LC2, or the first electrode layer 412 and the second electrode layer 422 can be disposed in a patterned manner to regulate local dimming liquid crystals LC2.

[0051] In this embodiment, depending on the type of the dimming liquid crystal LC2, when the display module 100 is configured in the second display mode, the dimming liquid crystal LC2 can be deflected toward the first side or the second side; for example, when the driver is on the first side of the display module 100, the dimming liquid crystal LC2 can be deflected toward the first side, and when the driver is on the second side of the display module 100, the dimming liquid crystal LC2 can be deflected toward the second side.

[0052] To address the issue of light leakage that may occur when viewing the cross polarizer at an angle in the non-axial direction, this application utilizes a compensation film to improve the situation.

[0053] Referring to Figures 2 and 3, the display module 100 further includes a first phase retardation layer 610, which can be disposed between the first polarizer 510 and the second polarizer 520. For example, in the structures of Figures 2 and 3, the first phase retardation layer 610 is disposed between the first polarizer 510 and the dimming module 400; in the structure of Figure 4, the first phase retardation layer 610 is disposed between the second polarizer 520 and the dimming module 400; and in the structure of Figure 5, the first phase retardation layer 610 is disposed between the first polarizer 510 and the dimming module 400, and between the second polarizer 520 and the dimming module 400.

[0054] In the display module 100 of this application, the angle of the transmission axis of the first phase retardation layer 610 is parallel to the first direction. For example, in the structure of FIG2, taking the thickness direction of the display module 100 as the Z direction, the lateral direction as the X direction (i.e., the direction from the first side to the second side), and the direction perpendicular to the plane containing the X and Z directions as the Y direction, the angle of the transmission axis of the first phase retardation layer 610 only needs to be parallel to the projection direction of the dimming liquid crystal LC2 on the XY plane. However, the dimming liquid crystal LC2 of this application mainly deflects in the plane containing the XZ, so the projection of the dimming liquid crystal LC2 on the XY plane will be parallel to the X direction, that is, the angle of the transmission axis of the first phase retardation layer 610 is parallel to the first direction.

[0055] Since the transmission axis directions of the second polarizer 520 and the fourth polarizer 540 may not be consistent, some of the light rays that are led out from the second polarizer 520 and incident on the fourth polarizer 540 may be lost. Therefore, this application can provide a second phase delay layer 620 between the second polarizer 520 and the fourth polarizer 540.

[0056] Referring to Figure 2, the display module 100 further includes a second phase retardation layer 620 disposed between the fourth polarizer 540 and the second polarizer 520. The angle of the transmission axis of the second phase retardation layer 620 is half of the sum of the angle of the fourth transmission axis 540a and the angle of the second transmission axis 520a. For example, when the angle of the second transmission axis 520a is 0° and the angle of the fourth transmission axis 540a is 45°, the angle of the transmission axis of the second phase retardation layer 620 can be 22.5°.

[0057] The second phase delay layer 620 of this application can deflect the light emitted from the second polarizer 520 to the same angle as the transmission axis of the fourth polarizer 540, thus avoiding light loss.

[0058] Please refer to Figure 6. The fourth transmission axis 540a and the second transmission axis 520a are parallel, that is, the angle of the light rays exported from the second polarizer 520 is parallel to the transmission axis of the fourth polarizer 540. Therefore, this application can remove the second phase delay layer 620.

[0059] Please refer to Figure 7. Based on Figure 6, since the fourth transmission axis 540a and the second transmission axis 520a are parallel, the second phase delay layer 620 can be removed. When the transmission axis of the second polarizer 520 is perpendicular to the transmission axis of the third polarizer 530, the second polarizer 520 can be reused as the lower polarizer of the display panel 200. That is, the second polarizer 520 can contact the surface of the display panel 200 away from the third polarizer 530. At the same time, the fourth polarizer 540 can be removed, simplifying the structure of the display module 100.

[0060] The working principle of the display module 100 in the first display mode and the second display mode of this application will be described below using the structure in Figure 2 as an example.

[0061] Please refer to Figure 2. When the display module 100 is in the first display mode, i.e., the conventional display mode, the dimming liquid crystal LC2 is arranged in a direction parallel to the X direction, that is, the long axis of the dimming liquid crystal LC2 is parallel to the X direction. Both front-view and side-view light rays from the backlight module 300 can pass through, and the display image of the display module 100 can be obtained from both front-view and side-view angles. At the same time, the light rays from the backlight module 300 form polarized light after passing through the first transmission axis 510a of the first polarizer 510. Under the action of the dimming liquid crystal LC2, the polarization direction of the polarized light is twisted and passes through the second transmission axis 520a of the second polarizer 520. In addition, if the dimming liquid crystal LC2 has a phase delay of λ / 2, the transmittance of the second polarizer 520 can be improved.

[0062] Please refer to Figure 8. When the display module 100 is in the second display mode, i.e., the single-sided privacy display mode, the dimming liquid crystal LC2 will be deflected in the XZ plane. That is, the major axis of the dimming liquid crystal LC2 will be set at an angle to the X-axis, and the angle between the dimming liquid crystal LC2 and the X-axis will range from 20° to 60°. Light rays directed from the backlight module 300, both those facing forward and those directed towards the second side, will pass through normally, while light rays directed from the backlight module 300 towards the second side will not pass through. For example... When the first transmission axis 510a of the first polarizer 510 is 135°, the transmission axis of the second polarizer 520 is 45°, and the angle between the dimming liquid crystal LC2 and the X-axis is 45°, and the driver is located on the first side of the display module 100, the side-view light in the range of 135° to 225° on the first side has low brightness and good privacy protection effect. The privacy protection effect will not decrease due to changes in viewing angle. The following explanation uses viewing angles of 135°, 180° and 225° as examples.

[0063] At a viewing angle of 225°, please refer to Figure 9. The major axis of the dimming liquid crystal LC2 is perpendicular to the first transmission axis 510a of the first polarizer 510. The polarized light emitted from the backlight module 300 after passing through the first polarizer 510 has a component only on the minor axis of the dimming liquid crystal LC2. Therefore, the polarized light will not be deflected after passing through the dimming liquid crystal LC2. The polarization direction of the polarized light is perpendicular to the second transmission axis 520a of the second polarizer 520. The polarized light cannot pass through the second polarizer 520. Therefore, at a viewing angle of 225°, the display module 100 appears black.

[0064] At a 180° viewing angle, please refer to Figure 10. The major axis of the dimming liquid crystal LC2 is parallel to the driver's viewing angle. The polarized light emitted from the backlight module 300 after passing through the first polarizer 510 has a component only on the minor axis of the dimming liquid crystal LC2. Therefore, the polarized light will not be deflected after passing through the dimming liquid crystal LC2. The polarization direction of the polarized light is perpendicular to the second transmission axis 520a of the second polarizer 520. The polarized light cannot pass through the second polarizer 520. Therefore, at a 180° viewing angle, the display module 100 appears black.

[0065] At a viewing angle of 135°, please refer to Figure 11. The long axis of the dimming liquid crystal LC2 is parallel to the first transmission axis 510a of the first polarizer 510. The polarized light emitted from the backlight module 300 after passing through the first polarizer 510 has a component only on the long axis of the dimming liquid crystal LC2. Therefore, the polarized light will not be deflected after passing through the dimming liquid crystal LC2. The polarization direction of the polarized light is perpendicular to the second transmission axis 520a of the second polarizer 520. The polarized light cannot pass through the second polarizer 520. Therefore, at a viewing angle of 225°, the display module 100 appears black.

[0066] Based on the above analysis, when the driver is within the range of 135° to 225° on the first side of the display module 100, the side view light of the display module 100 at this angle has low brightness, and the anti-peeping effect will not decrease due to the change of viewing angle, thereby realizing the unilateral anti-peeping of the display module 100 and ensuring the safety of vehicle driving.

[0067] This application also proposes a display device, which includes the above-mentioned display module. The display device can be any product or component with display function, such as a mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or navigator.

[0068] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0069] The technical solutions provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions in the embodiments of this application.

Claims

1. A display module, wherein, The display module includes a first side and a second side opposite to each other, both the first side and the second side being located on one side of the light emission direction of the display module; wherein, the display module includes: Backlight module; A dimming module is located on one side of the light emission direction of the backlight module; The display panel is located on the side of the dimming module away from the backlight module; Wherein, the display module is configured in a first display mode, where the total amount of light emitted by the dimming module to the first side is equal to the total amount of light emitted by the display module to the second side; and the display module is configured in a second display mode, where the total amount of light emitted by the dimming module to the first side is less than the total amount of light emitted by the display module to the second side.

2. The display module according to claim 1, wherein, The display module also includes: A first polarizer is disposed between the backlight module and the dimming module, and the first polarizer has a first transmission axis; A second polarizer is disposed between the dimming module and the display panel. The second polarizer has a second transmission axis, and the first transmission axis and the second transmission axis are perpendicular to each other. The dimming module further includes a dimming liquid crystal, which is deflected toward the first side or the second side when the display module is configured in the second display mode.

3. The display module according to claim 2, wherein, The angle between the first transmission axis and the first direction is 125° to 145°, and the angle between the second transmission axis and the first direction is 35° to 55°. The first direction is the direction from the first side to the second side.

4. The display module according to claim 2, wherein, The display module further includes a first phase delay layer, which is disposed between the first polarizer and the dimming module.

5. The display module according to claim 2, wherein, The first phase delay layer is disposed between the second polarizer and the dimming module.

6. The display module according to claim 2, wherein, The first phase delay layer is disposed between the first polarizer and the dimming module, and between the second polarizer and the dimming module.

7. The display module according to any one of claims 4 to 6, wherein, The transmission axis of the first phase delay layer is parallel to the first direction.

8. The display module according to claim 2, wherein, The display module also includes: A third polarizer is disposed on the side of the display panel away from the dimming module, and the third polarizer has a third transmission axis; The second polarizer is in contact with the surface of the display panel away from the third polarizer, and the third transmission axis is perpendicular to the second transmission axis.

9. The display module according to claim 2, wherein, The display module also includes: A third polarizer is disposed on the side of the display panel away from the dimming module, and the third polarizer has a third transmission axis; A fourth polarizer is disposed between the display panel and the second polarizer, the fourth polarizer having a fourth transmission axis, and the third transmission axis being perpendicular to the fourth transmission axis; A second phase delay layer is disposed between the fourth polarizer and the second polarizer; The angle of the transmission axis of the second phase delay layer is half the sum of the angle of the fourth transmission axis and the angle of the second transmission axis.

10. The display module according to claim 9, wherein, The fourth transmission axis is parallel to the second transmission axis.

11. The display module according to any one of claims 2 to 6, wherein, The dimming module includes: The first substrate includes a first substrate material, a first electrode layer disposed on the side of the first substrate away from the first polarizer, and a first alignment layer disposed on the side of the first electrode layer away from the first substrate. The second substrate includes a second substrate, a second electrode layer disposed on the side of the second substrate away from the second polarizer, and a second alignment layer disposed on the side of the second electrode layer away from the second substrate; A dimming liquid crystal is disposed between the first substrate and the second substrate.

12. The display module according to claim 11, wherein, The first electrode layer and the second electrode layer are integrally formed.

13. A display device, wherein, The display device includes a display module, the display module including a first side and a second side opposite to each other, the first side and the second side both located on one side of the light emission direction of the display module; wherein, the display module includes: Backlight module; A dimming module is located on one side of the light emission direction of the backlight module; The display panel is located on the side of the dimming module away from the backlight module; Wherein, the display module is configured in a first display mode, where the total amount of light emitted by the dimming module to the first side is equal to the total amount of light emitted by the display module to the second side; and the display module is configured in a second display mode, where the total amount of light emitted by the dimming module to the first side is less than the total amount of light emitted by the display module to the second side.

14. The display device according to claim 13, wherein, The display module also includes: A first polarizer is disposed between the backlight module and the dimming module, and the first polarizer has a first transmission axis; A second polarizer is disposed between the dimming module and the display panel. The second polarizer has a second transmission axis, and the first transmission axis and the second transmission axis are perpendicular to each other. The dimming module further includes a dimming liquid crystal, which is deflected toward the first side or the second side when the display module is configured in the second display mode.

15. The display device according to claim 14, wherein, The angle between the first transmission axis and the first direction is 125° to 145°, and the angle between the second transmission axis and the first direction is 35° to 55°. The first direction is the direction from the first side to the second side.

16. The display device according to claim 14, wherein, The display module further includes a first phase delay layer, which is disposed between the first polarizer and the dimming module; Alternatively, the first phase delay layer may be disposed between the second polarizer and the dimming module. Alternatively, the first phase delay layer may be disposed between the first polarizer and the dimming module, and between the second polarizer and the dimming module.

17. The display device according to claim 16, wherein, The transmission axis of the first phase delay layer is parallel to the first direction.

18. The display device according to claim 14, wherein, The display module also includes: A third polarizer is disposed on the side of the display panel away from the dimming module, and the third polarizer has a third transmission axis; The second polarizer is in contact with the surface of the display panel away from the third polarizer, and the third transmission axis is perpendicular to the second transmission axis.

19. The display device according to claim 14, wherein, The display module also includes: A third polarizer is disposed on the side of the display panel away from the dimming module, and the third polarizer has a third transmission axis; A fourth polarizer is disposed between the display panel and the second polarizer, the fourth polarizer having a fourth transmission axis, and the third transmission axis being perpendicular to the fourth transmission axis; A second phase delay layer is disposed between the fourth polarizer and the second polarizer; The angle of the transmission axis of the second phase delay layer is half the sum of the angle of the fourth transmission axis and the angle of the second transmission axis.

20. The display device according to claim 19, wherein, The fourth transmission axis is parallel to the second transmission axis.

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