Display panel and display device

Abstract

A display panel and a display device, the display panel comprising a first glass substrate (1), a color filter substrate (2), a first polarizer (3), a liquid crystal layer (4), and a second glass substrate (5), wherein the color filter substrate (2) is arranged on one side of the first glass substrate (1); the first polarizer (3) is arranged on the side of the color filter substrate (2) that faces away from the first glass substrate (1); the liquid crystal layer (4) is arranged on the side of the first polarizer (3) that faces away from the color filter substrate (2); and the second glass substrate (5) is arranged on the side of the liquid crystal layer (4) that faces away from the first polarizer (3).

Description

Display panel and display device

[0001] This application claims priority to Chinese patent application No. 202311540880.7 filed on November 16, 2023, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of display technology, and in particular to a display panel and a display device. Background Art

[0003] With the continuous development of liquid crystal technology, the contrast of liquid crystal display panels has become one of the important indicators to measure the level of liquid crystal technology. SUMMARY OF THE INVENTION

[0004] Due to the limited polarization degree, light that obliquely enters the liquid crystal display panel is scattered and reflected to the front of the panel, resulting in a decrease in the contrast of the display panel.

[0005] A display panel according to an embodiment of the present application comprises:

[0006] a first glass substrate;

[0007] A color film substrate is provided on one side of the first glass substrate;

[0008] a first polarizer, disposed on a side of the color filter substrate facing away from the first glass substrate;

[0009] a liquid crystal layer, disposed on a side of the first polarizer facing away from the color filter substrate;

[0010] The second glass substrate is disposed on a side of the liquid crystal layer away from the first polarizer.

[0011] A display device according to an embodiment of the present application includes a display panel, wherein the display panel includes:

[0012] a first glass substrate;

[0013] A color film substrate is provided on one side of the first glass substrate;

[0014] a first polarizer, disposed on a side of the color filter substrate facing away from the first glass substrate;

[0015] a liquid crystal layer, disposed on a side of the first polarizer facing away from the color filter substrate;

[0016] The second glass substrate is disposed on a side of the liquid crystal layer away from the first polarizer. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below only disclose some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] FIG1 is a schematic diagram of the overall structure of a display panel according to an embodiment of the present application;

[0019] FIG2 is a schematic diagram showing the principle of improving contrast and brightness of a display panel according to an embodiment of the present application.

[0020] Reference numerals:

[0021] 1. First glass substrate; 2. Color film substrate; 3. First polarizer; 4. Liquid crystal layer; 5. Second glass substrate; 6. Second polarizer; 7. Light polarization layer; 71. Fourth polarizer; 72. Additional retarder; 73. Third polarizer; 8. Backlight layer; 9. First optical path; 10. Second optical path; 11. Third optical path; 12. Fourth optical path; X, height direction. Modes for Carrying Out the Invention

[0022] 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 embodiments described 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 making creative efforts are within the scope of protection of this application.

[0023] In the description of this application, it should be understood that the orientation or positional relationship indicated by the terms "upper" and "lower" is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of this application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0024] The present application may repeat reference numerals and / or reference letters in different embodiments. This repetition is for the purpose of simplicity and clarity and does not in itself indicate a relationship between the various embodiments and / or settings discussed.

[0025] A display panel according to an embodiment of the present application comprises:

[0026] a first glass substrate;

[0027] A color film substrate is provided on one side of the first glass substrate;

[0028] a first polarizer, disposed on a side of the color filter substrate facing away from the first glass substrate;

[0029] a liquid crystal layer, disposed on a side of the first polarizer facing away from the color filter substrate;

[0030] The second glass substrate is disposed on a side of the liquid crystal layer away from the first polarizer.

[0031] In some embodiments, a second polarizer is further included. The second polarizer is disposed on a side of the second glass substrate away from the liquid crystal layer. The first polarizer and the second polarizer are made of different materials.

[0032] In some embodiments, a light polarizing layer is further included, and the light polarizing layer is disposed on a side of the second polarizer facing away from the second glass substrate.

[0033] In some embodiments, the light polarizing layer includes a third polarizer, and the third polarizer is disposed on a side of the second polarizer facing away from the second glass substrate.

[0034] In some embodiments, the light polarization layer further includes an additional retarder disposed between the second polarizer and the third polarizer.

[0035] In some embodiments, the light polarizing layer further includes a fourth polarizer, and the fourth polarizer is disposed between the additional retarder and the second polarizer.

[0036] In some embodiments, the second polarizer is an absorptive polarizer, the third polarizer is a reflective polarizer, and the fourth polarizer is a reflective polarizer.

[0037] In some embodiments, the first polarizer is a coatable polarizer.

[0038] In some embodiments, a backlight layer is further included, and the backlight layer is disposed on a side of the light polarization layer away from the second polarizer.

[0039] Accordingly, a display device according to an embodiment of the present application includes the display panel described in any one of the aforementioned embodiments.

[0040] Beneficial Effects: A display panel according to an embodiment of the present application includes a first glass substrate, a color filter substrate, a first polarizer, a liquid crystal layer, and a second glass substrate stacked along the thickness direction of the display panel. The color filter substrate is disposed on one side of the first glass substrate; the first polarizer is disposed on the side of the color filter substrate facing away from the first glass substrate; the liquid crystal layer is disposed on the side of the first polarizer facing away from the color filter substrate; and the second glass substrate is disposed on the side of the liquid crystal layer facing away from the first polarizer. By disposing the first polarizer between the color filter substrate and the liquid crystal layer, the first polarizer blocks obliquely transmitted light from sub-pixels, thereby suppressing parallax and effectively improving the contrast of the display panel.

[0041] A display device according to an embodiment of the present application includes the display panel described in any one of the aforementioned embodiments. It is understood that the display device includes the technical features and technical effects of the display panel in the aforementioned embodiments, which will not be described in detail here.

[0042] Please refer to Figures 1 and 2 in combination. An embodiment of the present application provides a display panel, which includes a first glass substrate 1, a color filter substrate 2, a first polarizer 3, a liquid crystal layer 4, and a second glass substrate 5 stacked along the thickness direction X of the display panel; the color filter substrate 2 is arranged on one side of the first glass substrate 1; the first polarizer 3 is arranged on the side of the color filter substrate 2 facing away from the first glass substrate 1; the liquid crystal layer 4 is arranged on the side of the first polarizer 3 facing away from the color filter substrate 2; and the second glass substrate 5 is arranged on the side of the liquid crystal layer 4 facing away from the first polarizer 3.

[0043] It should be noted that the structure of a conventional liquid crystal display panel is generally a first glass substrate 1, a color filter substrate 2, a liquid crystal layer 4, and a second glass substrate 5 stacked along the thickness direction X. Then, an upper polarizer is provided on the side of the first glass substrate 1 facing away from the color filter substrate 2. At this time, light that obliquely enters the liquid crystal display panel is scattered and reflected to the front of the panel. In order to suppress reflection, an AG (Anti-Glare) film layer is provided on the upper polarizer to suppress part of the light reflected to the front of the panel. At this time, a portion of the oblique light component is still scattered toward the front of the panel, resulting in a decrease in contrast. However, the present application disposes the first polarizer 3 between the color filter substrate 2 and the liquid crystal layer 4, so that the first polarizer 3 directly blocks the oblique transmitted light of the sub-pixel, effectively blocking the scattering and reflection of the oblique light, thereby suppressing parallax and effectively improving the contrast of the display panel. There is no need to add an AG film layer or other structures. The first polarizer 3 is built into the display panel and is directly prepared during the formation process of the display unit of the display panel. It is equivalent to a part of the display unit and does not need to be adhered to the outside of the display unit with an additional adhesive. While improving the contrast of the display panel, it is also beneficial to thinning the display panel.

[0044] In some embodiments, the first polarizer 3 is a coatable polarizer.

[0045] It should be noted that the thickness and composition of the coatable polarizer can be designed and adjusted according to the polarization characteristics requirements of the display panel, so that optical effects with different polarization directions can be obtained according to the requirements, thereby facilitating the direct blocking of the inclined light transmitted by the liquid crystal layer 4 in the present application, achieving the purpose of suppressing parallax, and thereby improving the contrast of the display panel.

[0046] In some embodiments, a second polarizer 6 is further included. The second polarizer 6 is disposed on a side of the second glass substrate 5 facing away from the liquid crystal layer 4 . The first polarizer 3 and the second polarizer 6 are made of different materials.

[0047] It should be noted that the second polarizer 6 is provided to polarize the incident light from below the liquid crystal layer 4 , thereby controlling the direction of the light entering the liquid crystal layer 4 .

[0048] The second polarizer 6 is an absorption polarizer, which is made of a material with absorption properties and can selectively absorb light waves in a specific direction, so that the light passing through it has a certain polarization property.

[0049] Specifically, in the embodiment of the present application, the second polarizer 6 is set to absorb part of the oblique incident light, thereby achieving partial absorption of the oblique light of the incident light entering the liquid crystal layer 4, reducing the oblique light in the incident light, thereby increasing the proportion of axial incident light, and further improving the axial contrast of the display panel.

[0050] In some embodiments, a light polarizing layer 7 is further included. The light polarizing layer 7 is disposed on a side of the second polarizer 6 facing away from the second glass substrate 5 .

[0051] It should be noted that, in the embodiment of the present application, the light polarization layer 7 is configured to perform initial light polarization on the incident light of the display panel, in order to ensure the incident amount of axial light and reduce the incident amount of oblique light.

[0052] In some embodiments, the light polarizing layer 7 includes a third polarizer 73 . The third polarizer 73 is disposed on a side of the second polarizer 6 facing away from the second glass substrate 5 .

[0053] In the embodiment of the present application, the light polarization layer 7 can be a third polarizer 73. At this time, the third polarizer 73 is used to perform initial polarization on the incident light. After the initial polarization by the third polarizer 73, the light enters the second polarizer 6 for polarized absorption, thereby achieving partial absorption of inclined light, reducing off-axis light, and improving axial contrast.

[0054] The third polarizer 73 in the embodiment of the present application can be a reflective polarizer, which converts the incident light into linearly polarized light and initially reflects part of the inclined light in the incident light to ensure smooth transmission of axial light and effectively reduce off-axis light.

[0055] In some embodiments, the light polarizing layer 7 further includes an additional retarder 72 , which is disposed between the second polarizer 6 and the third polarizer 73 .

[0056] In an embodiment of the present application, the optical fiber polarization layer also includes an additional retarder 72. At this time, the incident light is first converted into linearly polarized light through the third polarizer 73, and then reaches the additional retarder 72. After passing through the additional retarder 72, it becomes elliptically polarized light, and then enters the second polarizer 6 to be converted into linearly polarized light. After the incident light passes through the third polarizer 73, the additional retarder 72 and the second polarizer 6, the off-axis light entering the liquid crystal layer 4 is effectively reduced, the proportion of axial light in the light entering the liquid crystal layer 4 is greatly increased, and the incidence of oblique light is reduced, thereby increasing the axial light emitted from the surface of the display panel, thereby effectively improving the axial contrast of the liquid crystal display panel.

[0057] It should be noted that the additional retarder 72 can specifically be an additional phase retarder, which has off-axis refractive index anisotropy but on-axis refractive index is isotropy. Therefore, after the linearly polarized light converted by the third polarizer 73 passes through the additional retarder 72, the optical properties of the axial light are not affected, so that the off-axis light is weakened before entering the liquid crystal layer 4, thereby suppressing axial light leakage and improving the front view contrast.

[0058] In some embodiments, the light polarizing layer 7 further includes a fourth polarizer 73 , which is disposed between the additional retarder 72 and the second polarizer 6 .

[0059] In the embodiment of the present application, a fourth polarizer 73 is arranged between the second polarizer 6 and the additional retarder 72, and the fourth polarizer 73 can be a reflective polarizer, which can reflect part of the off-axis polarized light through the fourth polarizer 73 after the light passes through the additional retarder 72, and reflect the linear polarized light back to the additional retarder 72 and convert the negative pressure retarder into elliptically polarized light, and a part of the polarized light returns to the light-emitting side through the third polarizer 73.

[0060] In some embodiments, a backlight layer 8 is further included. The backlight layer 8 is disposed on a side of the light polarizing layer 7 facing away from the second polarizer 6 .

[0061] In an embodiment of the present application, a backlight layer 8 is provided on the side of the light polarization layer 7 facing away from the second polarizer 6, and the backlight layer 8 is utilized to provide a backlight source for the display panel. As the light-emitting side of the display panel, the emitted light is polarized by the light polarization layer 7 and then input into the second polarizer 6 and passes through the second polarizer 6 to enter the liquid crystal layer 4, and finally is polarized by the first polarizer 3 and emitted from the display panel.

[0062] It should be noted that in the embodiment of the present application, the display panel can achieve different light emitting effects for the light emitted by the backlight layer 8. Specifically, the display panel of the embodiment of the present application is mainly used to improve the display contrast of the oblique light emitted by the backlight layer 8 on the display panel.

[0063] As shown in Figure 2 , when viewing the image straight ahead, the light follows the first optical path 9 in Figure 2 . At this point, the polarization state of the light remains unchanged due to the additional retarder 72, and the light enters the liquid crystal layer 4 axially, i.e., along the thickness direction X of the display panel. This leaves the normal viewing experience unaffected. When viewing the image sideways, the light emitted by the backlight layer 8 is converted into linearly polarized light by the third polarizer 73, and then converted into elliptically polarized light by the additional retarder 72. The specific optical path is shown as the second optical path 10 in Figure 2 . The light in the second optical path 10 is partially absorbed by the second polarizer 6, thereby reducing off-axis light before entering the liquid crystal layer 4 and improving axial contrast. A fourth polarizer 73 is arranged between the additional retarder 72 and the second polarizer 6. After the light of the second light path passes through the additional retarder 72, the linearly polarized light reflected by the fourth polarizer 73 is converted into elliptically polarized light after passing through the additional retarder 72. A part of the elliptically polarized light returns to the backlight layer 8 through the third polarizer 73. The specific light path is shown as the third light path 11 in Figure 2. The light guide plate of the backlight layer 8 again reflects part of the light in the third light path 11 axially toward the liquid crystal layer 4. The specific light path is shown as the fourth light path 12 in Figure 2, which helps to improve the brightness of the axial light, thereby achieving the purpose of reducing the backlight power consumption.

[0064] Accordingly, a display device according to an embodiment of the present application includes the display panel described in any one of the aforementioned embodiments.

[0065] It should be noted that the display device of the embodiment of the present application can be: a mobile phone, a television, a display screen, a car display, a learning machine and other display devices.

[0066] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0067] In summary, although the present application is disclosed above with preferred embodiments, the above preferred embodiments are not intended to limit the present application. Ordinary technicians in this field can make various changes and modifications without departing from the spirit and scope of the present application. Therefore, the scope of protection of the present application is based on the scope defined by the claims.

Claims

1. A display panel, wherein: include: The display panel is stacked along the thickness direction (X) A first glass substrate (1); A color film substrate (2) arranged on one side of the first glass substrate (1); A first polarizer (3) arranged on a side of the color film substrate (2) facing away from the first glass substrate (1); A liquid crystal layer (4) is arranged on a side of the first polarizer (3) facing away from the color film substrate (2); The second glass substrate (5) is arranged on a side of the liquid crystal layer (4) facing away from the first polarizer (3).

2. The display panel according to claim 1, wherein: It also comprises a second polarizer (6), the second polarizer (6) being arranged on a side of the second glass substrate (5) facing away from the liquid crystal layer (4), and the first polarizer (3) and the second polarizer (6) being made of different materials.

3. The display panel according to claim 2, wherein: It also comprises a light polarization layer (7), wherein the light polarization layer (7) is arranged on a side of the second polarizer (6) facing away from the second glass substrate (5).

4. The display panel according to claim 3, wherein: The light polarization layer (7) comprises a third polarizer (73), and the third polarizer (73) is arranged on a side of the second polarizer (6) facing away from the second glass substrate (5).

5. The display panel according to claim 4, wherein: The light polarization layer (7) further comprises an additional retarder (72), wherein the additional retarder (72) is arranged between the second polarizer (6) and the third polarizer (73).

6. The display panel according to claim 5, wherein: The additional delay device is an additional phase delay device.

7. The display panel according to claim 5, wherein: The light polarization layer (7) further comprises a fourth polarizer (71), wherein the fourth polarizer (71) is arranged between the additional retarder (72) and the second polarizer (6).

8. The display panel according to claim 7, wherein: The second polarizer (6) is an absorption-type polarizer, the third polarizer (73) is a reflection-type polarizer, and the fourth polarizer (71) is a reflection-type polarizer.

9. The display panel according to claim 1, wherein: The first polarizer (3) is a coatable polarizer.

10. The display panel according to claim 3, wherein: It also comprises a backlight layer (8), wherein the backlight layer (8) is arranged on a side of the light polarization layer (7) facing away from the second polarizer (6).

11. A display device, wherein: A display panel is included, wherein the display panel includes: A first glass substrate (1); A color film substrate (2) arranged on one side of the first glass substrate (1); A first polarizer (3) arranged on a side of the color film substrate (2) facing away from the first glass substrate (1); A liquid crystal layer (4) is arranged on a side of the first polarizer (3) facing away from the color film substrate (2); The second glass substrate (5) is arranged on a side of the liquid crystal layer (4) facing away from the first polarizer (3).

12. The display device according to claim 11, wherein: It also comprises a second polarizer (6), the second polarizer (6) being arranged on a side of the second glass substrate (5) facing away from the liquid crystal layer (4), and the first polarizer (3) and the second polarizer (6) being made of different materials.

13. The display device according to claim 12, wherein: It also comprises a light polarization layer (7), wherein the light polarization layer (7) is arranged on a side of the second polarizer (6) facing away from the second glass substrate (5).

14. The display device according to claim 13, wherein: The light polarization layer (7) comprises a third polarizer (73), and the third polarizer (73) is arranged on a side of the second polarizer (6) facing away from the second glass substrate (5).

15. The display device according to claim 14, wherein: The light polarization layer (7) further comprises an additional retarder (72), wherein the additional retarder (72) is arranged between the second polarizer (6) and the third polarizer (73).

16. The display device according to claim 15, wherein: The light polarization layer (7) further comprises a fourth polarizer (71), wherein the fourth polarizer (71) is arranged between the additional retarder (72) and the second polarizer (6).

17. The display device according to claim 16, wherein: The additional delay device is an additional phase delay device.

18. The display device according to claim 16, wherein: The second polarizer (6) is an absorption-type polarizer, the third polarizer (73) is a reflection-type polarizer, and the fourth polarizer (71) is a reflection-type polarizer.

19. The display device according to claim 11, wherein: The first polarizer (3) is a coatable polarizer.

20. The display device according to claim 13, wherein: It also comprises a backlight layer (8), wherein the backlight layer (8) is arranged on a side of the light polarization layer (7) facing away from the second polarizer (6).

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