Display panel, display device, and photo-alignment method

Abstract

The embodiments of the present application provide a display panel, a display device, and a light alignment method. The display panel includes a first substrate, a second substrate, a liquid crystal layer, a first polarizer, and a second polarizer. The first substrate and the second substrate are arranged opposite to each other, the liquid crystal layer is located between the first substrate and the second substrate, the first polarizer is located on the side of the first substrate away from the second substrate, and the light-taking axis direction of the first polarizer is a first direction, the second polarizer is located on the side of the second substrate away from the first substrate, and the light-taking axis direction of the second polarizer is a second direction, and the second direction is perpendicular to the first direction; the first substrate includes a first alignment layer, the second substrate includes a second alignment layer, and the absolute value of the angle between the alignment of the first alignment layer and the alignment of the second alignment layer in the same domain ranges from 81 degrees to 84 degrees. The embodiments of the present application can improve the brightness and color differences between left and right viewing angles and up and down viewing angles, thereby reducing the color cast of the display panel.

Description

Technical Field

[0001] The present application relates to the field of display technology, and more specifically, to a display panel, a display device, and a light alignment method. Background Art

[0002] Most thin-film transistor (TFT) LCDs currently on the market are backlit liquid crystal displays (LCDs), consisting of a liquid crystal panel and a backlight module. The LCD panel is composed of a color filter (CF), a TFT substrate, and a liquid crystal layer. The LCD panel operates by placing liquid crystal molecules between two parallel glass substrates. The liquid crystal molecules change direction by applying electricity to the glass substrates, refracting light from the backlight module to produce the image.

[0003] Liquid crystal alignment control technology ensures a stable and uniform arrangement of liquid crystal molecules within a panel. This is typically achieved through the use of an alignment film. Photoalignment is a non-contact alignment technique that uses linearly polarized light to illuminate a photosensitive polymer alignment film, aligning the liquid crystal molecules on the substrate uniformly in one direction. This results in a pre-tilt angle (pretilt angle) between the liquid crystal molecules and the substrate.

[0004] The existing UV2A process (ultraviolet vertical alignment process) is a common method for liquid crystal alignment. Specifically, the TFT substrate (also known as the array substrate) and the CF substrate (also known as the color filter substrate) are aligned twice, respectively, so that the alignment of the TFT substrate and the CF substrate are perpendicular to each other. This related technology is prone to differences in brightness and color between left and right viewing angles and top and bottom viewing angles, resulting in color cast issues. Summary of the Invention

[0005] The present application proposes a display panel, a display device, and a light alignment method to solve or alleviate the technical problems of the related art, such as the differences in brightness and color between left and right viewing angles and top and bottom viewing angles, and the large color shift.

[0006] In a first aspect, an embodiment of the present application provides a display panel, comprising:

[0007] a first substrate and a second substrate arranged opposite to each other;

[0008] a liquid crystal layer located between the first substrate and the second substrate,

[0009] a first polarizer, located on a side of the first substrate away from the second substrate, and the light-taking axis direction of the first polarizer is a first direction;

[0010] a second polarizer, located on a side of the second substrate away from the first substrate, with an optical axis of the second polarizer directed in a second direction, the second direction being perpendicular to the first direction;

[0011] The first substrate includes a first alignment layer, the second substrate includes a second alignment layer, and an absolute value of an angle between the alignments of the first alignment layer and the second alignment layer in the same domain ranges from 81 degrees to 84 degrees.

[0012] In a possible implementation, the alignment of the second alignment layer is perpendicular to the first direction, and an absolute value of an angle between the alignment of the first alignment layer and the first direction in the same domain ranges from 9 degrees to 6 degrees.

[0013] In a possible implementation, the first substrate is an array substrate, and the second substrate is a color filter substrate;

[0014] The first substrate further includes a first electrode layer, and the first electrode layer includes a plurality of first slits;

[0015] The absolute value of the angle between the extension direction of the first slit and the first direction in the same domain ranges from 80 degrees to 89 degrees, and the distance between any two adjacent first slits ranges from 1 micron to 4 microns.

[0016] In a possible implementation, the first substrate is a color filter substrate, and the second substrate is an array substrate;

[0017] The first substrate further includes a first electrode layer, and the first electrode layer includes a plurality of first slits;

[0018] The absolute value of the angle between the extension direction of the first slit and the first direction in the same domain ranges from 80 degrees to 89 degrees, and the distance between any two adjacent first slits ranges from 1 micron to 4 microns.

[0019] The absolute value of the included angle between the extension direction of the first slit and the second direction in the same domain ranges from 6 degrees to 9 degrees.

[0020] In a possible implementation, the first substrate further includes a first electrode layer, and the electrode layer includes a plurality of first slits;

[0021] The absolute value of the angle between the first slit and the first direction in the same domain ranges from 80 degrees to 89 degrees, and the distance between any two adjacent first slits ranges from 1 micron to 4 microns;

[0022] The second substrate further includes a first electrode layer, wherein the first electrode layer includes a plurality of second slits;

[0023] The absolute value of the angle between the second slit and the second direction in the same domain ranges from 80 degrees to 89 degrees, and the distance between any two adjacent second slits ranges from 1 micron to 4 microns.

[0024] In a second aspect, an embodiment of the present application provides a display device, comprising: a backlight module and the display panel as described above;

[0025] The display panel is located on the light-emitting side of the backlight module.

[0026] In a third aspect, an embodiment of the present application provides a method for optical alignment, which is applied to the display panel described above, comprising:

[0027] exposing the first alignment material film of the first substrate to a first polarized light and a second polarized light with opposite polarization directions to obtain a first intermediate alignment layer;

[0028] exposing the first intermediate alignment layer to third polarized light having a first angle with the first polarized light and fourth polarized light having a second angle with the first polarized light, to obtain a second intermediate alignment layer; wherein the absolute values ​​of the first angle and the second angle are both in a range of 37 degrees to 53 degrees;

[0029] The second intermediate alignment layer is exposed to light based on fifth polarized light having a polarization direction perpendicular to the first polarized light to obtain a first alignment layer.

[0030] In a possible implementation, the display panel includes a plurality of sub-pixels, and each of the sub-pixels includes at least four domains arranged in an array;

[0031] The four domains in the same sub-pixel are respectively the first domain, the second domain, the third domain and the fourth domain in a clockwise direction;

[0032] The exposing process of the first alignment material film of the first substrate based on the first polarized light and the second polarized light having opposite polarization directions to obtain the first intermediate alignment layer includes: exposing and aligning the first domain area and the fourth domain area using the first polarized light, and exposing and aligning the second domain area and the third domain area using the second polarized light;

[0033] The method comprises: exposing the first intermediate alignment layer to the third polarized light having a first angle between its polarization direction and the first polarized light and the fourth polarized light having a second angle between its polarization direction and the first polarized light to obtain the second intermediate alignment layer, comprising: exposing and aligning the first domain and the fourth domain using the third polarized light, and exposing and aligning the second domain and the third domain using the fourth polarized light;

[0034] The exposing the second intermediate alignment layer based on the fifth polarized light having a polarization direction perpendicular to the first polarized light to obtain the first alignment layer includes: exposing and aligning the third domain and the fourth domain using the fifth polarized light.

[0035] In a possible implementation, using the first polarized light to expose and align the first domain and the fourth domain, and using the second polarized light to expose and align the second domain and the third domain, includes:

[0036] Expose and align the first domain and the fourth domain using the first polarized light of the first exposure energy, and expose and align the second domain and the third domain using the second polarized light of the first exposure energy;

[0037] The method of using the third polarized light to expose and align the first domain and the fourth domain, and using the fourth polarized light to expose and align the second domain and the third domain, comprises:

[0038] The first domain and the fourth domain are exposed and aligned using the third polarized light of the second exposure energy, and the second domain and the third domain are exposed and aligned using the fourth polarized light of the second exposure energy; the second exposure energy is 0.15 to 0.35 times the first exposure energy;

[0039] The exposing and aligning the third domain and the fourth domain by using the fifth polarized light comprises:

[0040] The third domain and the fourth domain are exposed and aligned using the fifth polarized light of a third exposure energy; the third exposure energy is lower than or equal to the second exposure energy.

[0041] The beneficial technical effects brought about by the technical solutions provided in the embodiments of the present application include:

[0042] The display panel includes a first substrate, a second substrate, a liquid crystal layer, a first polarizer, and a second polarizer. The first substrate and the second substrate are arranged relative to each other, the liquid crystal layer is located between the first substrate and the second substrate, the first polarizer is located on the side of the first substrate away from the second substrate, and the light-taking axis direction of the first polarizer is a first direction. The second polarizer is located on the side of the second substrate away from the first substrate, and the light-taking axis direction of the second polarizer is a second direction, which is perpendicular to the first direction. In other words, the display panel in the embodiment of the present application adopts a VA mode. In the VA mode, the absolute value of the angle between the alignment of the first alignment layer of the first substrate and the alignment of the second alignment layer of the second substrate in the same domain ranges from 81 degrees to 84 degrees, so that the absolute value of the angle between the long axis of the liquid crystal in the liquid crystal cell and the horizontal direction approaches 45 degrees (i.e., 45 degrees ± 1 degrees). This can improve the brightness and color differences between the left and right viewing angles and the up and down viewing angles caused by the absolute value of the angle between the long axis of the liquid crystal in the liquid crystal cell and the horizontal direction being around 40 degrees in the related art, thereby reducing the color cast of the display panel.

[0043] Additional aspects and advantages of the present application will be given in part in the following description, which will become apparent from the following description, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0045] Figure 1 Schematic diagram of the alignment force of the array substrate and the color filter substrate in the related art.

[0046] Figure 2 Schematic diagram of liquid crystal steering in related art.

[0047] Figure 3 A graph showing the relationship between skin color difference and viewing angle under left and right viewing angles in the related art;

[0048] Figure 4 is a graph showing the relationship between contrast and viewing angle at left and right viewing angles in the related art;

[0049] Figure 5 A graph showing the relationship between skin color difference and viewing angle under upper and lower viewing angles in the related art;

[0050] Figure 6 is a graph showing the relationship between contrast and viewing angle at upper and lower viewing angles in the related art;

[0051] Figure 7 A graph showing the relationship between the azimuth angle difference between the color filter substrate and the array substrate and the azimuth angle of the liquid crystal provided in an embodiment of the present application;

[0052] Figure 8 A graph showing the relationship between the absolute value of the angle of the slits in the transparent conductive layer and the azimuth angle of the liquid crystal provided in an embodiment of the present application;

[0053] Figure 9 A schematic structural diagram of a display panel provided in the first embodiment of the present application;

[0054] Figure 10 A schematic diagram of an alignment of the first substrate and the second substrate in the display panel provided in the first embodiment of the present application;

[0055] Figure 11 A schematic structural diagram of the first electrode layer in a display panel provided in the second embodiment of the present application when the first substrate is an array substrate;

[0056] Figure 12 A schematic diagram of another alignment of the first substrate and the second substrate in the display panel provided in the second embodiment of the present application;

[0057] Figure 13 A schematic structural diagram of the first electrode layer in a display panel provided in a second embodiment of the present application when the first substrate and the array substrate are arranged opposite to each other;

[0058] Figure 14 A schematic structural diagram of a display device provided in a third embodiment of the present application;

[0059] Figure 15 A flowchart of a photo-alignment method provided in a fourth embodiment of the present application;

[0060] Figure 16 A schematic diagram of step S11 when the photo-alignment method provided in the fourth embodiment of the present application is applied to an array substrate;

[0061] Figure 17 A schematic diagram of step S12 when the photo-alignment method provided in the fourth embodiment of the present application is applied to an array substrate;

[0062] Figure 18 A schematic diagram of step S13 when the photo-alignment method provided in the fourth embodiment of the present application is applied to an array substrate;

[0063] Figure 19 This is an equivalent schematic diagram of step S12 and step S13 when the photo-alignment method provided in the fourth embodiment of the present application is applied to an array substrate;

[0064] Figure 20 A schematic diagram of step S11 when the photo-alignment method provided in the fourth embodiment of the present application is applied to a first substrate disposed opposite to an array substrate;

[0065] Figure 21A schematic diagram of step S12 when the photo-alignment method provided in the fourth embodiment of the present application is applied to a first substrate disposed opposite to the array substrate;

[0066] Figure 22 A schematic diagram of step S13 when the photo-alignment method provided in the fourth embodiment of the present application is applied to a first substrate disposed opposite to the array substrate;

[0067] Figure 23 This is an equivalent schematic diagram of step S12 and step S13 when the photo-alignment method provided in the fourth embodiment of the present application is applied to a first substrate disposed opposite to the array substrate.

[0068] Reference numerals:

[0069] 100-display panel;

[0070] 11- first substrate;

[0071] 111 - first substrate; 112 - first alignment layer; 113 - first electrode layer; 113a - first slit;

[0072] 12- second substrate;

[0073] 121 - second substrate; 122 - second alignment layer; 123 - first electrode layer;

[0074] 13- liquid crystal layer;

[0075] 14-first polarizer;

[0076] 15- second polarizer;

[0077] a-first domain; b-second domain; c-third domain; d-fourth domain;

[0078] - The angle between the alignment of the color filter substrate and the alignment of the array substrate;

[0079] α-the angle between the extension direction of the first slit and the first direction;

[0080] 10- backlight module;

[0081] U1-first polarized light;

[0082] U2-second polarized light;

[0083] U3-third polarized light;

[0084] U4-fourth polarized light;

[0085] U5-fifth polarized light;

[0086] W-first direction;

[0087] V-second direction;

[0088] X1 and X2 - alignment of color filter substrate;

[0089] Y1 and Y2 - alignment of the array substrate;

[0090] L - extension direction of the first slit;

[0091] X-horizontal direction;

[0092] Y-vertical direction. DETAILED DESCRIPTION

[0093] The following describes the embodiments of the present application in conjunction with the accompanying drawings. It should be understood that the embodiments described below in conjunction with the accompanying drawings are exemplary descriptions for explaining the technical solutions of the embodiments of the present application and do not constitute a limitation on the technical solutions of the embodiments of the present application.

[0094] Those skilled in the art will understand that, unless otherwise stated, the singular forms "a", "an", "said", and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of this application refers to the presence of the described features, integers, steps, operations, elements and / or components, but does not exclude the implementation of other features, information, data, steps, operations, elements, components and / or combinations thereof supported by the technical field. The term "and / or" used herein refers to at least one of the items defined by the term, for example, "A and / or B" can be implemented as "A", or as "B", or as "A and B".

[0095] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0096] Liquid crystal display panels are usually composed of a color filter substrate (CF substrate), a thin film transistor array substrate (TFT substrate) and a liquid crystal layer (LCL) disposed between the two substrates. Its working principle is to control the rotation of the liquid crystal molecules in the liquid crystal layer by applying a driving voltage on the two glass substrates, refracting the light from the backlight module to produce a picture. According to the different orientation modes of the liquid crystal, the liquid crystal display panels currently on the mainstream market can be divided into the following types: vertical alignment (VA), twisted nematic (TN) or super twisted nematic (STN), in-plane switching (IPS), and fringe field switching (FFS).

[0097] For VA mode, the liquid crystal display device mainly consists of two substrates, upper and lower, and negative liquid crystal molecules sandwiched between the two substrates. A transparent conductive layer (indium tin oxide, ITO) is placed on the inner side of both substrates to form a perpendicular electric field. In the absence of a perpendicular electric field, the negative liquid crystal molecules embedded between the two transparent conductive layers align perpendicularly to the substrate surfaces. When a perpendicular electric field is applied, the liquid crystal molecules align in a specific direction, ultimately aligning perpendicularly to the direction of the electric field.

[0098] The VA mode has the advantages of high contrast and high transmittance display. However, since the VA mode uses vertically rotated liquid crystals, the difference in the birefringence of the liquid crystal molecules is relatively large, resulting in poor viewing angles and serious color shift problems under large viewing angles. Multi-domain VA technology is usually used, which divides a sub-pixel into multiple areas (i.e., multiple domains) and makes the liquid crystal molecules in each area rotate at different angles after voltage is applied, thereby improving the color shift problem.

[0099] Figure 1 Schematic diagram of alignment force when laminating array substrate and color filter substrate in related art. Here, array substrate 20 is obtained after two exposure alignments, and color filter substrate 30 is obtained after two exposure alignments. With the film surface of array substrate 20 facing upward (array substrate 20 is closer to the outside of the paper than color filter substrate 30), the alignment force after laminating array substrate 20 and color filter substrate 30 is shown as follows: Figure 3 As shown on the far right.

[0100] The inventors found that in the UV2A process (ultraviolet vertical alignment process) in the related art, the TFT substrate (also known as the array substrate) and the CF substrate (also known as the color filter substrate) are aligned twice respectively. The liquid crystal molecules are twisted at different angles, and dark lines appear in the area where the rotation exceeds 90°. A "卐"-shaped dark pattern will be formed on the display panel. The dark pattern causes a great loss of transmittance, and as the pixel size decreases, the transmittance loss becomes more serious.

[0101] See Figure 2 , Figure 2 is a schematic diagram of liquid crystal turning in the related art. The liquid crystal turning on the TFT side represents the turning of molecules in the liquid crystal layer under the alignment force of the array substrate, the liquid crystal turning on the CF side represents the turning of molecules in the liquid crystal layer under the alignment force of the color filter substrate, the intermediate state of the liquid crystal layer molecules represents the turning of the liquid crystal molecules under the combined action of the array substrate and the color filter substrate, and the dark line represents the area with extremely low transmittance in the area where the liquid crystal molecules rotate more than 90°.

[0102] In addition, the inventors also found that in the related art, the absolute value of the angle between the long axis of the liquid crystal in the liquid crystal cell and the horizontal direction is about 40°, resulting in differences in brightness, darkness and color between the left and right viewing angles and the upper and lower viewing angles, and there is a color deviation problem.

[0103] For the UV2A process in the related art, in the VA mode, the color deviation specifications generally use Skin Color (skin color difference, representing color difference) and CR(80 / 20) (contrast ratio, representing brightness and darkness) as the judgment basis. The specifications are CR(80 / 20)≥30% at ±30° viewing angle and Skin Color≤0.02 at ±30° viewing angle.

[0104] Figure 3 is the relationship curve between the skin color difference and the viewing angle at the left and right viewing angles in the related art.

[0105] Figure 4 is the relationship curve between the contrast ratio and the viewing angle at the left and right viewing angles in the related art.

[0106] Figure 5 is the relationship curve between the skin color difference and the viewing angle at the upper and lower viewing angles in the related art.

[0107] Figure 6 is the relationship curve between the contrast ratio and the viewing angle at the upper and lower viewing angles in the related art.

[0108] As can be seen, at ±30° horizontal viewing angles, the measured Skin Color is 0.0161, and the CR (80 / 20) is 36.44%. At ±30° vertical viewing angles, the measured Skin Color is 0.0283, and the CR (80 / 20) is 24.61%. It can be seen that the color cast is quite high under vertical viewing angles, and the brightness and color differences between horizontal and vertical viewing angles are obvious.

[0109] Furthermore, the inventors measured the in-plane azimuth angle of the display panel obtained using related technologies and found that the absolute value of the angle between the long axis of the liquid crystal and the horizontal direction is approximately 40°. Given the current azimuth angle, the azimuth angle within the liquid crystal cell is slightly inclined toward the exposure angle of the color filter substrate. Therefore, it is necessary to adjust the exposure method to improve the azimuth angle of the liquid crystal, thereby improving the significant differences in brightness and color between left and right viewing angles and top and bottom viewing angles.

[0110] The inventors further discovered that Figure 7 The figure shows the relationship between the azimuth angle difference between the color filter substrate and the array substrate and the azimuth angle of the liquid crystal. The azimuth angle difference between the color filter substrate and the array substrate refers to the absolute value of the angle between the alignment layer of the color filter substrate and the alignment layer of the array substrate.

[0111] The inventors also discovered that Figure 8 As shown, it is a graph showing the relationship between the absolute value of the angle of the slit (ie, ITO Slit) of the transparent conductive layer (indium tin oxide, ITO) and the azimuth angle of the liquid crystal.

[0112] Specifically, Figure 7 、 Figure 8 Both are applicable to liquid crystal layers with a cell gap (cell thickness) of 3.0 microns to 3.4 microns.

[0113] The following is a detailed description of the technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems with specific embodiments. It should be noted that the following embodiments can refer to, draw on, or combine with each other, and the same terms, similar features, and similar implementation steps in different embodiments will not be repeated.

[0114] The first embodiment of the present application provides a display panel 100, such as Figure 9As shown, it includes: a first substrate 11, a second substrate 12, a liquid crystal layer 13, a first polarizer 14 and a second polarizer 15. The first substrate 11 and the second substrate 12 are arranged opposite to each other, the liquid crystal layer 13 is located between the first substrate 11 and the second substrate 12, the first polarizer 14 is located on the side of the first substrate 11 away from the second substrate 12, and the light-taking axis direction of the first polarizer 14 is a first direction W, the second polarizer is located on the side of the second substrate away from the first substrate, and the light-taking axis direction of the second polarizer is a second direction V, and the second direction V is perpendicular to the first direction W.

[0115] The first substrate includes a first alignment layer, the second substrate includes a second alignment layer, and the absolute value of the angle between the alignments of the first alignment layer and the second alignment layer in the same domain ranges from 81 degrees to 84 degrees.

[0116] The light extraction axis direction of the first polarizer is the first direction W, the light extraction axis direction of the second polarizer is the second direction V, and the second direction V is perpendicular to the first direction W. That is, the display panel in the embodiment of the present application adopts the VA mode.

[0117] See also Figure 7 When the azimuth angle difference between the first substrate and the second substrate is between 81 and 84 degrees, the azimuth angle of the liquid crystal is close to 45 degrees (i.e., 45 degrees ± 1 degree). Therefore, in the embodiment of the present application, in the VA mode, since the absolute value of the angle between the alignment of the first alignment layer of the first substrate and the alignment of the second alignment layer of the second substrate in the same domain is in the range of 81 to 84 degrees, the absolute value of the angle between the long axis of the liquid crystal in the liquid crystal cell and the horizontal direction can be close to 45 degrees, thereby improving the brightness and color differences between the left and right viewing angles and the up and down viewing angles caused by the absolute value of the angle between the long axis of the liquid crystal in the liquid crystal cell and the horizontal direction being around 40 degrees in the related art, thereby reducing the color shift of the display panel; at the same time, since the absolute value of the angle between the long axis of the liquid crystal in the liquid crystal cell and the horizontal direction is close to 45 degrees, the rotation angle of the liquid crystal molecules will not exceed 90 degrees, which can effectively improve the edge dark stripe phenomenon and improve the light transmittance of the backlight module.

[0118] Continue to see Figure 9 The first substrate 11 includes a first underlay 111 and a first alignment layer 112 located on a side of the first substrate 111 close to the second substrate 12. The second substrate 12 includes a second underlay 121 and a second alignment layer 122 located on a side of the second substrate 121 close to the first substrate 11.

[0119] Optionally, the first substrate 11 further includes a first electrode layer 113, which may be located between the first substrate 111 and the first alignment layer 112. The second substrate 12 may further include a second electrode layer 123 (ITO layer, a transparent conductive layer), which is located between the second substrate 121 and the second alignment layer 122. Both the first electrode layer 113 and the second electrode layer 123 may be transparent conductive layers, such as indium tin oxide layers (ITO layers).

[0120] In a possible implementation, the alignment of the second alignment layer is perpendicular to the first direction, and the absolute value of the angle between the alignment of the first alignment layer and the first direction in the same domain ranges from 9 degrees to 6 degrees.

[0121] That is to say, the second alignment layer adopts the existing UV2A process (using two polarized lights with opposite polarization directions for two exposure alignments), and the first alignment layer adjusts the initial azimuth angle of the surface of the first substrate through synthetic exposure so that the absolute value of the angle within the same domain area as the first direction is in the range of 9 degrees to 6 degrees, so that the absolute value of the angle within the same domain area between the alignment of the first alignment layer and the alignment of the second alignment layer is in the range of 81 degrees to 84 degrees, thereby making the azimuth angle in the liquid crystal box close to 45 degrees.

[0122] See also Figure 7 When the azimuth angle difference between the first and second substrates is 90°, the measured azimuth angle of the liquid crystal layer is around 40°. To achieve a 45° azimuth angle of the liquid crystal layer, extensive experimental data analysis revealed that an azimuth angle difference of 81-84° between the first and second substrates effectively reduces the influence of the alignment force on the alignment layer of the substrate on one side of the liquid crystal layer (e.g., the first substrate) on the other side (e.g., the second substrate), bringing the azimuth angle of the liquid crystal layer closer to 45 degrees (i.e., 45°±1°).

[0123] Optionally, in this embodiment, the absolute value range of the angle between the alignment of the first alignment layer and the alignment of the second alignment layer in the same domain is 82 degrees. That is, the absolute value range of the angle between the alignment of the first alignment layer and the first direction in the same domain is 8 degrees. Figure 7 When the azimuth angle difference between the first substrate and the second substrate is 82 degrees, the azimuth angle of the liquid crystal is 45°.

[0124] See also Figure 10In this embodiment, in the display panel 100, the first substrate may be an array substrate, and the second substrate may be a color filter substrate or another substrate including a second alignment layer (in this case, the array substrate and the color filter substrate may be located on the same side of the liquid crystal layer). Specifically, the first substrate utilizes the existing UV2A process, and the alignments of the first substrate are X1 and X2 (both X1 and X2 are parallel to the horizontal direction X). The array substrate adjusts the initial azimuth angle of the array substrate surface through synthetic exposure, thereby changing the azimuth angle within the liquid crystal cell, resulting in the alignments of the array substrate being Y1 and Y2.

[0125] Continue to see Figure 10 , the four domains of the same sub-pixel of the display panel are the first domain a, the second domain b, the third domain c and the fourth domain d. In the first domain a, the alignment of the first substrate is X1, the alignment of the array substrate is Y1, and the angle between the two is In the second domain b, the alignment of the first substrate is X1, the alignment of the array substrate is Y2, and the angle between the two is In the third domain c, the alignment of the first substrate is X2, the alignment of the array substrate is Y1, and the angle between the two is In the fourth domain d, the alignment of the first substrate is X2, the alignment of the array substrate is Y2, and the angle between the two is That is, in the four domains a, b, c, and d of the same sub-pixel of the display panel, the angle between the alignment of the first substrate and the alignment of the array substrate is The absolute value range is 81 degrees to 84 degrees.

[0126] See also Figure 11 The first substrate is an array substrate, the array substrate includes a first electrode layer 113, the first electrode layer 113 may include a plurality of first slits 113a (i.e., ITO Slit), and the absolute value of the angle α between the extension direction L of the first slit 113a and the first direction W (parallel to the horizontal direction at this time) in the same domain area is in a range of 80 degrees to 89 degrees.

[0127] Optionally, the distance between any two adjacent first slits 113 a ranges from 1 micron to 4 microns, wherein the distance between any two adjacent first slits 113 a represents the distance between any two adjacent first slits 113 a in the extension direction L perpendicular to the first slits 113 a.

[0128] That is to say, Figure 11 The absolute value of the angle α between the extension direction L of the first slit 113a and the horizontal direction ranges from 80 degrees to 89 degrees. In other words, the absolute value of the angle between the extension direction L of the first slit 113a and the vertical direction in the same domain ranges from 1 degree to 10 degrees.

[0129] See also Figure 8When the absolute value of the angle of the slit of the transparent conductive layer is 1 degree to 10 degrees, the azimuth angle of the liquid crystal is close to 45 degrees, which can further improve the color deviation problem.

[0130] Continue to see Figure 11 In practical applications, in the four domains a, b, c, and d of the same sub-pixel of the display panel, the extension directions L of the first slits 113a in adjacent domains are arranged axially symmetrically.

[0131] Correspondingly, the second substrate includes a full second electrode layer (excluding the slits, for example, a full ITO layer). This full second electrode layer of the second substrate and the first electrode layer of the array substrate with the slits (i.e., ITO slits) can form an electric field. Liquid crystal molecules (e.g., negative liquid crystals) embedded between the first and second electrode layers align in a specific direction under the action of the electric field, further ensuring that the azimuth angle of the liquid crystal molecules within the liquid crystal cell is close to 45 degrees.

[0132] It should be noted that since the alignment layer of the array substrate adjusts the initial azimuth angle of the surface through synthetic exposure, and the first electrode layer of the array substrate is provided with a first slit (i.e., ITO Slit), both measures are located on one side of the array substrate. The first slit of the first electrode layer can better cooperate with the first alignment layer, so that the azimuth angle of the liquid crystal box can be closer to the ideal 45 degrees.

[0133] Of course, when the initial azimuth angle of the surface of the alignment layer of the array substrate is adjusted through synthetic exposure, a whole first electrode layer can also be set on one side of the array substrate, and the second electrode layer of the second substrate can be set as an electrode layer with a second slit. At this time, the second slit of the second electrode layer can also make the azimuth angle of the liquid crystal box closer to the ideal 45 degrees to a certain extent.

[0134] Optionally, the absolute value of the angle between the extension direction L of the first slit 113a and the second direction in the same domain ranges from 6 degrees to 9 degrees. In this case, the absolute value of the angle between the extension direction L of the first slit 113a and the horizontal direction in the same domain ranges from 81 degrees to 84 degrees, and the absolute value of the angle between the extension direction L of the slit and the vertical direction in the same domain ranges from 6 degrees to 9 degrees. This arrangement can achieve an azimuth angle of the liquid crystal molecules in the liquid crystal cell closer to 45 degrees (i.e., 45°±1°). See Figure 8 When the absolute value of the angle of the transparent conductive layer is 6 degrees to 9 degrees, the azimuth angle of the liquid crystal is 46 to 47 degrees.

[0135] In this embodiment, the absolute value of the angle between the extension direction of the first slit 113a and the second direction in the same domain can be 8 degrees, so that the azimuth angle of the liquid crystal is closer to 45 degrees. Figure 8It can be seen that when the absolute value of the angle of the transparent conductive layer (ie, the absolute value of the angle between the extension direction of the first slit 113a and the second direction in the same domain) is 8 degrees, the azimuth angle of the liquid crystal is 45 degrees.

[0136] The beneficial technical effects brought about by the technical solutions provided in the embodiments of the present application include:

[0137] In VA mode, the absolute value of the angle between the alignment of the first alignment layer of the first substrate and the alignment of the second alignment layer of the second substrate in the same domain ranges from 81 degrees to 84 degrees, so that the absolute value of the angle between the long axis of the liquid crystal in the liquid crystal box and the horizontal direction is close to 45°, thereby improving the brightness and color differences between the left and right viewing angles and the up and down viewing angles caused by the absolute value of the angle between the long axis of the liquid crystal in the liquid crystal box and the horizontal direction being around 40° (degrees) in the related technology, thereby reducing the color cast of the display panel; at the same time, since the absolute value of the angle between the long axis of the liquid crystal in the liquid crystal box and the horizontal direction is close to 45°, the rotation angle of the liquid crystal molecules will not exceed 90°, which can effectively improve the edge dark pattern phenomenon and improve the light transmittance of the backlight module.

[0138] The second embodiment of the present application provides a display panel. Figure 12 The main difference is that the second substrate can be an array substrate, the first substrate can be a color filter substrate, or other substrates including a second alignment layer (in this case, the array substrate and the color filter substrate can be located on the same side of the liquid crystal layer).

[0139] That is, the array substrate uses the existing UV2A process, and the alignment of the array substrate is Y1 and Y2 (Y1 and Y2 are both parallel to the vertical direction Y). The first substrate adjusts the initial azimuth angle of the color filter substrate surface through synthetic exposure, thereby changing the azimuth angle within the liquid crystal cell. The alignment of the first substrate is X1 and X2.

[0140] Continue to see Figure 12 , the four domains of the same sub-pixel of the display panel are the first domain a, the second domain b, the third domain c and the fourth domain d. In the first domain a, the alignment of the first substrate is X1, the alignment of the array substrate is Y1, and the angle between the two is In the second domain b, the alignment of the first substrate is X1, the alignment of the array substrate is Y2, and the angle between the two is In the third domain c, the alignment of the first substrate is X2, the alignment of the array substrate is Y1, and the angle between the two is In the fourth domain d, the alignment of the first substrate is X2, the alignment of the array substrate is Y2, and the angle between the two is That is, in the four domains a, b, c, and d of the same sub-pixel of the display panel, the angle between the alignment of the first substrate and the alignment of the array substrate is The range is 81 degrees to 84 degrees.

[0141] See also Figure 13 The first substrate includes a first electrode layer 113, which may include a plurality of first slits 113a (i.e., ITO slits). In this case, the absolute value of the angle β between the extension direction of the first slits 113a and the first direction W (parallel to the vertical direction) within the same domain ranges from 80 degrees to 89 degrees.

[0142] Optionally, the distance between any two adjacent first slits 113 a ranges from 1 micron to 4 microns, wherein the distance between any two adjacent first slits 113 a represents the distance between any two adjacent first slits 113 a in the extension direction L perpendicular to the first slits 113 a.

[0143] That is to say, Figure 13 The absolute value of the angle β between the extension direction L of the first slit 113a and the vertical direction ranges from 80 degrees to 89 degrees. In other words, the absolute value of the angle between the extension direction L of the first slit 113a and the horizontal direction in the same domain ranges from 1 degree to 10 degrees.

[0144] Continue to see Figure 13 In practical applications, in the four domains a, b, c, and d of the same sub-pixel of the display panel, the extension directions L of the first slits 113a in adjacent domains are arranged axially symmetrically.

[0145] Correspondingly, the array substrate includes a full first electrode layer (excluding the slits, a complete first electrode layer). This full first electrode layer of the array substrate and the first electrode layer of the color filter substrate with the slits (i.e., ITO slits) form an electric field. Liquid crystal molecules (e.g., negative-tone liquid crystals) embedded between the two first electrode layers align in a specific direction under the influence of the electric field, further ensuring that the azimuth angle of the liquid crystal molecules within the liquid crystal cell is close to 45 degrees.

[0146] It should be noted that, since the first alignment layer of the first substrate (for example, a color filter substrate) adjusts the initial azimuth angle of the surface through synthetic exposure, and the first electrode layer of the first substrate is provided with a first slit (i.e., ITO Slit), both measures are located on one side of the first substrate, and the first slit of the first electrode layer can better cooperate with the first alignment layer, so that the azimuth angle of the liquid crystal box can be closer to the ideal 45 degrees. In other words, the angle setting of the alignment layer and the slit of the first substrate (for example, a color filter substrate) in this embodiment is similar to that of the array substrate described above, and structurally, both of them set the alignment layer and the slit with changing angles on the same side, so the change pattern of the azimuth angle of the liquid crystal box in this embodiment is the same as that of the array substrate. Figure 8 resemblance.

[0147] Of course, when the initial azimuth angle of the surface of the alignment layer of the first substrate is adjusted through synthetic exposure, a whole first electrode layer can also be set on one side of the first substrate, and the second electrode layer of the second substrate can be set as an electrode layer with a second slit. At this time, the second slit of the second electrode layer can also make the azimuth angle of the liquid crystal box closer to the ideal 45 degrees to a certain extent.

[0148] Optionally, the absolute value of the angle between the extension direction L of the first slit 113a and the second direction within the same domain ranges from 6 degrees to 9 degrees. In this case, the absolute value of the angle between the extension direction L of the first slit 113a and the horizontal direction within the same domain ranges from 81 degrees to 84 degrees, and the absolute value of the angle between the extension direction L of the slit and the vertical direction within the same domain ranges from 6 degrees to 9 degrees. This configuration can achieve an azimuth angle of the liquid crystal molecules within the liquid crystal cell closer to 45 degrees (i.e., 45°±1°).

[0149] In this embodiment, the absolute value of the angle between the extension direction of the first slit 113a and the second direction in the same domain can be 8 degrees, so that the azimuth angle of the liquid crystal is closer to 45 degrees. Figure 8 It can be seen that when the absolute value of the angle of the transparent conductive layer is 8 degrees, the azimuth angle of the liquid crystal is 45 degrees.

[0150] The beneficial technical effects brought about by the technical solutions provided in the embodiments of the present application include:

[0151] In VA mode, the absolute value of the angle between the alignment of the first alignment layer of the first substrate and the alignment of the second alignment layer of the second substrate in the same domain ranges from 81 degrees to 84 degrees, so that the absolute value of the angle between the long axis of the liquid crystal in the liquid crystal box and the horizontal direction is close to 45°, thereby improving the brightness and color differences between the left and right viewing angles and the up and down viewing angles caused by the absolute value of the angle between the long axis of the liquid crystal in the liquid crystal box and the horizontal direction being around 40° (degrees) in the related technology, thereby reducing the color cast of the display panel; at the same time, since the absolute value of the angle between the long axis of the liquid crystal in the liquid crystal box and the horizontal direction is close to 45° (i.e., 45°±1°), the rotation angle of the liquid crystal molecules will not exceed 90°, which can effectively improve the edge dark pattern phenomenon and improve the light transmittance of the backlight module.

[0152] In some other feasible embodiments, the array substrate and the color filter substrate may both include an electrode layer having slits. In the following, the first substrate is taken as an array substrate as an example.

[0153] Specifically, the first substrate 11 further includes a first electrode layer 113, which includes a plurality of first slits. The absolute value of the angle between the first slits and the first direction in the same domain ranges from 80 degrees to 89 degrees, and the spacing between any two adjacent first slits ranges from 1 micron to 4 microns.

[0154] That is, the absolute value of the angle between the extension direction of the first slit of the array substrate and the vertical direction in the same domain ranges from 1 degree to 10 degrees. Optionally, the absolute value of the angle between the extension direction of the first slit of the array substrate and the vertical direction in the same domain ranges from 6 degrees to 9 degrees.

[0155] The second substrate 12 may further include a second electrode layer 123. The second electrode layer 113 includes a plurality of second slits. The absolute value of the angle between the second slits and the second direction in the same domain ranges from 80 degrees to 89 degrees, and the spacing between any two adjacent second slits ranges from 1 micron to 4 microns.

[0156] That is, the absolute value of the angle between the extension direction of the second slit of the second substrate and the horizontal direction in the same domain ranges from 1 degree to 10 degrees. Optionally, the absolute value of the angle between the extension direction of the second slit of the second substrate and the horizontal direction in the same domain ranges from 6 degrees to 9 degrees.

[0157] In this embodiment, the absolute value of the angle between the extension direction of the first slit 113a and the second direction in the same domain can be 8 degrees, and the absolute value of the angle between the extension direction of the second slit of the second substrate and the horizontal direction in the same domain can be 8 degrees, so that the azimuth angle of the liquid crystal is closer to 45 degrees. Figure 8 It can be seen that when the absolute value of the angle of the transparent conductive layer is 8 degrees, the azimuth angle of the liquid crystal is 45 degrees.

[0158] By setting both sides of the array substrate and the second substrate as electrode layers with slits, the rotation of the liquid crystal molecules can be corrected in both directions, further ensuring that the absolute value of the angle between the long axis of the liquid crystal in the liquid crystal box and the horizontal direction is close to 45°, thereby improving the brightness and color differences between the left and right viewing angles and the up and down viewing angles.

[0159] The beneficial technical effects brought about by the technical solutions provided in the embodiments of the present application include:

[0160] In VA mode, the absolute value of the angle between the alignment of the first alignment layer of the first substrate and the alignment of the second alignment layer of the second substrate in the same domain ranges from 81 degrees to 84 degrees, so that the absolute value of the angle between the long axis of the liquid crystal in the liquid crystal box and the horizontal direction is close to 45°, thereby improving the brightness and color differences between the left and right viewing angles and the up and down viewing angles caused by the absolute value of the angle between the long axis of the liquid crystal in the liquid crystal box and the horizontal direction being around 40° (degrees) in the related technology, thereby reducing the color cast of the display panel; at the same time, since the absolute value of the angle between the long axis of the liquid crystal in the liquid crystal box and the horizontal direction is close to 45°, the rotation angle of the liquid crystal molecules will not exceed 90°, which can effectively improve the edge dark pattern phenomenon and improve the light transmittance of the backlight module.

[0161] It should be noted that the angle between the two directions in the above embodiment refers to the angle between the orthographic projections of the two directions in the WV plane (the plane formed by the first direction W and the second direction V).

[0162] Based on the same inventive concept, the third embodiment of the present application provides a display device, such as Figure 14 As shown, it includes: a backlight module 10 and the display panel as mentioned above, and the display panel is located on the light-emitting side of the backlight module 10.

[0163] Specifically, the display panel 100 may include: a first substrate 11, a second substrate 12, a liquid crystal layer 13, a first polarizer 14, and a second polarizer 15. The first substrate 11 includes a first substrate 111, a first alignment layer 112, and a first electrode layer 113. The second substrate 12 includes a second substrate 121, a second alignment layer 122, and a second electrode layer 123. The specific configuration is described in the previous embodiment and will not be repeated here.

[0164] In this embodiment, the backlight module 10 may be disposed on a side of the display panel 100 close to the first polarizer 14 .

[0165] Since this embodiment is an embodiment of a display device corresponding to a display panel, the technical details in the display panel embodiment are still applicable in this embodiment, and this embodiment can also achieve technical effects similar to those of the display panel embodiment, which will not be repeated here.

[0166] Based on the same inventive concept, the fourth embodiment of the present application provides a light alignment method, which is applied to the display panel as described above. Figure 15 As shown, including:

[0167] S11: performing an exposure process on the first alignment material film of the first substrate based on the first polarized light and the second polarized light with opposite polarization directions to obtain a first intermediate alignment layer.

[0168] S12: exposing the first intermediate alignment layer to the third polarized light having a first angle with the first polarized light and the fourth polarized light having a second angle with the first polarized light to obtain a second intermediate alignment layer.

[0169] The absolute value ranges of the first angle and the second angle are both 37 degrees to 53 degrees.

[0170] S13: performing an exposure process on the second intermediate alignment layer based on a fifth polarized light having a polarization direction perpendicular to the first polarized light, to obtain a first alignment layer.

[0171] Through the above steps, the alignment of the first alignment layer of the first substrate can be made to have an angle of 6 degrees to 9 degrees with the vertical direction (the vertical direction is perpendicular to the alignment of the second alignment layer of the second substrate), thereby ensuring that the absolute value of the angle between the alignment of the first alignment layer of the first substrate and the alignment of the second alignment layer of the second substrate in the same domain after cell alignment is in the range of 81 degrees to 84 degrees, so that the absolute value of the angle between the long axis of the liquid crystal in the liquid crystal box and the horizontal direction is close to 45°, thereby improving the problem in the related art that the absolute value of the angle between the long axis of the liquid crystal in the liquid crystal box and the horizontal direction is around 40° (degrees), resulting in differences in brightness and color between the left and right viewing angles and the up and down viewing angles, thereby reducing the color cast of the display panel.

[0172] It should be noted that by first executing step S12 and then executing step S13, only part of the domain area is exposed and aligned in step S13, and the alignment of part of the domain area of ​​the second intermediate alignment layer obtained in step S12 can be adjusted, so that the alignment of the four domain areas of the first substrate are different, solving the problem of difficulty in forming four domain areas with different alignments.

[0173] Optionally, the second alignment material film of the second substrate may be exposed based on sixth polarized light and seventh polarized light whose polarization directions are perpendicular to the first polarized light and opposite to each other to obtain a second alignment layer.

[0174] In this embodiment, the first substrate may be an array substrate. In this case, the first polarized light and the second polarized light are along a vertical direction.

[0175] Specifically, the display panel may include multiple sub-pixels, each sub-pixel includes four domains arranged in an array, and the four domains in the same sub-pixel are respectively the first domain, the second domain, the third domain and the fourth domain in a clockwise direction.

[0176] refer to Figure 16 Step S11 may include: using the first polarized light U1 to expose and align the first domain a and the fourth domain d, and using the second polarized light U2 to expose and align the second domain b and the third domain c.

[0177] refer to Figure 17 Step S12 may include: using the third polarized light U3 to expose and align the first domain a and the fourth domain d, and using the fourth polarized light U4 to expose and align the second domain b and the third domain c.

[0178] refer to Figure 18 Step S13 may include: using the fifth polarized light U5 to perform exposure and alignment on the third domain c and the fourth domain d.

[0179] In this embodiment, in step S13 , the fifth polarized light U5 may be used to perform exposure and alignment only on the third domain c and the fourth domain d, while the first domain a and the second domain b are not exposed and aligned.

[0180] At this time, the exposure alignment of step S12 and step S13 can be equivalent to Figure 19 The exposure alignment shown. The alignment diagram of the first alignment layer obtained after step S11, step S12 and step S13 is shown in FIG. Figure 10 .

[0181] Furthermore, in this embodiment, step S11 may include: exposing and aligning the first domain and the fourth domain using the first polarized light of the first exposure energy, and exposing and aligning the second domain and the third domain using the second polarized light of the first exposure energy.

[0182] In this embodiment, the first exposure energy range may be 18 to 22 J / cm 2 (Joules per square centimeter). Optionally, it can be 19J / cm 2 , 20J / cm 2 , 21J / cm 2 .

[0183] In this step, a PBS (Polarization Beam Splitter) may be used to obtain the first polarized light and the second polarized light.

[0184] Step S12 may include: exposing and aligning the first domain and the fourth domain using the third polarized light of the second exposure energy, and exposing and aligning the second domain and the third domain using the fourth polarized light of the second exposure energy.

[0185] The second exposure energy is 0.15 to 0.35 times the first exposure energy. In this embodiment, the second exposure energy can be in the range of 3 to 7 J / cm 2 (Joules per square centimeter). Optionally, it can be 4J / cm 2 , 5J / cm 2 , 6J / cm 2 .

[0186] In this step, a WGP (Wire Grid Polarize) may be used to obtain the third polarized light and the fourth polarized light.

[0187] Step S13 may include: performing exposure and alignment on the third domain and the fourth domain using fifth polarized light of third exposure energy; the third exposure energy is lower than or equal to the second exposure energy.

[0188] The third exposure energy is lower (may be slightly lower) or equal to the second exposure energy. In this embodiment, the third exposure energy may be in the range of 2 to 6 J / cm 2 (Joules per square centimeter). Optionally, it can be 3J / cm2 , 4J / cm 2 , 5J / cm 2 By setting the third exposure energy to be slightly lower than or equal to the second exposure energy, the exposure process in step S13 can prevent the alignment of the first substrate from being overly affected, resulting in an overcorrection of the azimuth angle. This ensures that the alignment of the first alignment layer of the first substrate and the alignment of the second alignment layer of the second substrate are within the same domain, with an absolute value of the angle ranging from 81 degrees to 84 degrees. This further makes the absolute value of the angle between the long axis of the liquid crystal in the liquid crystal cell and the horizontal direction closer to 45 degrees, thereby improving the brightness and color differences between left and right viewing angles and up and down viewing angles.

[0189] In this step, a PBS (Polarization Beam Splitter) can be used to obtain the first five polarized lights.

[0190] That is to say, in the three groups of exposure treatments (first exposure treatment, second exposure treatment and third exposure treatment) performed on the first substrate, the exposure energy of the second exposure treatment is 0.15 times to 0.35 times the exposure energy of the first exposure treatment, and the exposure energy of the third exposure treatment is lower than or equal to the exposure energy of the second exposure treatment.

[0191] In some other feasible implementations, the first substrate may be a substrate disposed opposite to the array substrate. In this case, the first polarized light and the second polarized light are along a horizontal direction.

[0192] refer to Figure 20 Step S11 may include: using the first polarized light U1 to expose and align the first domain a and the second domain b, and using the second polarized light U2 to expose and align the third domain c and the fourth domain d.

[0193] refer to Figure 21 Step S12 may include: using the third polarized light U3 to expose and align the first domain a and the second domain b, and using the fourth polarized light U4 to expose and align the third domain c and the fourth domain d.

[0194] refer to Figure 22 Step S13 may include: using the fifth polarized light U5 to perform exposure and alignment on the second domain b and the third domain c.

[0195] At this time, the exposure alignment of step S12 and step S13 can be equivalent to Figure 23 The exposure alignment shown. The alignment diagram of the first alignment layer obtained after step S11, step S12 and step S13 is shown in FIG. Figure 12 .

[0196] The specific exposure energy is as described above. The polarizers used to generate the first polarized light, the second polarized light, the third polarized light, the fourth polarized light and the fifth polarized light are similar to those described above and will not be described in detail here.

[0197] In practical applications, the photo-alignment method in this embodiment can be applied to obtain the display panel in the aforementioned embodiment. Therefore, the technical details in the display panel embodiment are still applicable in this embodiment and will not be repeated here.

[0198] The beneficial technical effects brought about by the technical solution provided in the embodiments of the present application include: through the above-mentioned optical alignment method, the alignment of the first alignment layer of the first substrate can be made to have an angle of 6 degrees to 9 degrees with the vertical direction (the vertical direction is perpendicular to the alignment of the second alignment layer of the second substrate), thereby ensuring that the absolute value of the angle between the alignment of the first alignment layer of the first substrate and the alignment of the second alignment layer of the second substrate in the same domain after the box is aligned is in the range of 81 degrees to 84 degrees, so that the absolute value of the angle between the long axis of the liquid crystal in the liquid crystal box and the horizontal direction is close to 45° (i.e., 45°±1°), thereby improving the absolute value of the angle between the long axis of the liquid crystal in the liquid crystal box and the horizontal direction in the related technology of about 40° (degrees), resulting in differences in brightness and color between the left and right viewing angles and the up and down viewing angles, thereby reducing the color deviation of the display panel.

[0199] Those skilled in the art will appreciate that the steps, measures, and schemes in the various operations, methods, and processes discussed in this application may be interchanged, modified, combined, or deleted. Furthermore, other steps, measures, and schemes in the various operations, methods, and processes discussed in this application may also be interchanged, modified, rearranged, decomposed, combined, or deleted. Furthermore, steps, measures, and schemes in the related art that are similar to those disclosed in this application may also be interchanged, modified, rearranged, decomposed, combined, or deleted.

[0200] In the description of this application, the directions or positional relationships indicated by words such as "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", and "outside" are exemplary directions or positional relationships based on the accompanying drawings. They are intended to facilitate or simplify the description of the embodiments of this application, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on this application.

[0201] 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 the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0202] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0203] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0204] It should be understood that, although the various steps in the flowchart of the accompanying drawings are displayed in sequence as indicated by the arrows, the order of implementation of these steps is not limited to the order indicated by the arrows. Unless otherwise clearly stated herein, in some implementation scenarios of the embodiments of the present application, the steps in each process can be performed in other orders as required. Moreover, some or all of the steps in each flowchart may include multiple sub-steps or multiple stages based on actual implementation scenarios. Some or all of these sub-steps or stages may be executed at the same time, or may be executed at different times in different scenarios at the execution time. The execution order of these sub-steps or stages may be flexibly configured as required, and the embodiments of the present application do not limit this.

[0205] The above is only part of the implementation methods of the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the technical concept of the solution of the present application, other similar implementation methods based on the technical ideas of the present application also fall within the protection scope of the embodiments of the present application.

Claims

1. A display panel, characterized in that: include: a first substrate and a second substrate arranged opposite to each other; a liquid crystal layer located between the first substrate and the second substrate, a first polarizer, located on a side of the first substrate away from the second substrate, and the optical axis direction of the first polarizer is a first direction; a second polarizer, located on a side of the second substrate away from the first substrate, with an optical axis of the second polarizer directed in a second direction, the second direction being perpendicular to the first direction; The first substrate includes a first alignment layer, the second substrate includes a second alignment layer, and the absolute value of the angle between the alignment of the first alignment layer and the alignment of the second alignment layer in the same domain ranges from 81 degrees to 84 degrees; the alignment of the second alignment layer is perpendicular to the first direction, and the absolute value of the angle between the alignment of the first alignment layer and the first direction in the same domain ranges from 6 degrees to 9 degrees.

2. The display panel according to claim 1, wherein: The first substrate is an array substrate; The first substrate further includes a first electrode layer, and the first electrode layer includes a plurality of first slits; The absolute value of the angle between the extension direction of the first slit and the first direction in the same domain ranges from 80 degrees to 89 degrees, and the distance between any two adjacent first slits ranges from 1 micron to 4 microns.

3. The display panel according to claim 1, wherein: The second substrate is an array substrate; The first substrate further includes a first electrode layer, and the first electrode layer includes a plurality of first slits; The absolute value of the angle between the extension direction of the first slit and the first direction in the same domain ranges from 80 degrees to 89 degrees, and the distance between any two adjacent first slits ranges from 1 micron to 4 microns.

4. The display panel according to claim 2 or 3, wherein: The absolute value of the included angle between the extension direction of the first slit and the second direction in the same domain ranges from 6 degrees to 9 degrees.

5. The display panel according to claim 1, wherein: The first substrate further includes a first electrode layer, and the first electrode layer includes a plurality of first slits; The absolute value of the angle between the first slit and the first direction in the same domain ranges from 80 degrees to 89 degrees, and the distance between any two adjacent first slits ranges from 1 micron to 4 microns; The second substrate further includes a second electrode layer, and the second electrode layer includes a plurality of second slits; The absolute value of the angle between the second slit and the second direction in the same domain ranges from 80 degrees to 89 degrees, and the distance between any two adjacent second slits ranges from 1 micron to 4 microns.

6. A display device, characterized in that: include: A backlight module and a display panel according to any one of claims 1 to 5; The display panel is located on the light-emitting side of the backlight module.

7. A photo-alignment method, characterized in that: The display panel according to any one of claims 1 to 5 comprises: exposing the first alignment material film of the first substrate to a first polarized light and a second polarized light with opposite polarization directions to obtain a first intermediate alignment layer; exposing the first intermediate alignment layer to third polarized light having a first angle with the first polarized light and fourth polarized light having a second angle with the first polarized light, to obtain a second intermediate alignment layer; wherein the absolute values ​​of the first angle and the second angle are both in a range of 37 degrees to 53 degrees; The second intermediate alignment layer is exposed to light based on fifth polarized light having a polarization direction perpendicular to the first polarized light to obtain a first alignment layer.

8. The photo-alignment method according to claim 7, wherein: The display panel includes a plurality of sub-pixels, and each of the sub-pixels includes at least four domains arranged in an array; The four domains in the same sub-pixel are respectively the first domain, the second domain, the third domain and the fourth domain in a clockwise direction; The exposing process of the first alignment material film of the first substrate based on the first polarized light and the second polarized light having opposite polarization directions to obtain the first intermediate alignment layer includes: exposing and aligning the first domain area and the fourth domain area using the first polarized light, and exposing and aligning the second domain area and the third domain area using the second polarized light; The method comprises: exposing the first intermediate alignment layer to the third polarized light having a first angle between its polarization direction and the first polarized light and the fourth polarized light having a second angle between its polarization direction and the first polarized light to obtain the second intermediate alignment layer, comprising: exposing and aligning the first domain and the fourth domain using the third polarized light, and exposing and aligning the second domain and the third domain using the fourth polarized light; The exposing the second intermediate alignment layer based on the fifth polarized light having a polarization direction perpendicular to the first polarized light to obtain the first alignment layer includes: exposing and aligning the third domain and the fourth domain using the fifth polarized light.

9. The photo-alignment method according to claim 8, wherein: The method of exposing and aligning the first domain and the fourth domain by using the first polarized light, and exposing and aligning the second domain and the third domain by using the second polarized light, comprises: Expose and align the first domain and the fourth domain using the first polarized light of the first exposure energy, and expose and align the second domain and the third domain using the second polarized light of the first exposure energy; The method of using the third polarized light to expose and align the first domain and the fourth domain, and using the fourth polarized light to expose and align the second domain and the third domain, comprises: The first domain and the fourth domain are exposed and aligned using the third polarized light of the second exposure energy, and the second domain and the third domain are exposed and aligned using the fourth polarized light of the second exposure energy; the second exposure energy is 0.15 to 0.35 times the first exposure energy; The exposing and aligning the third domain and the fourth domain by using the fifth polarized light comprises: The third domain and the fourth domain are exposed and aligned using the fifth polarized light of a third exposure energy; the third exposure energy is lower than or equal to the second exposure energy.

Images