CN116149100A

CN116149100A - Display panel, display device and photoalignment method

Info

Publication number: CN116149100A
Application number: CN202211530245.6A
Authority: CN
Inventors: 李凡; 任驹; 李林; 张勇; 彭林
Original assignee: BOE Technology Group Co Ltd; Chengdu BOE Display Technology Co Ltd
Current assignee: BOE Technology Group Co Ltd; Chengdu BOE Display Technology Co Ltd
Priority date: 2022-11-30
Filing date: 2022-11-30
Publication date: 2023-05-23

Abstract

The embodiment of the application provides a display panel, a display device and a photoalignment method. The display panel comprises a first substrate, a second substrate, a liquid crystal layer, a first polaroid and a second polaroid, wherein the first substrate and the second substrate are oppositely arranged, the liquid crystal layer is positioned between the first substrate and the second substrate, the first polaroid is positioned at one side of the first substrate far away from the second substrate, the optical axis direction of the first polaroid is a first direction, the second polaroid is positioned at one side of the second substrate far away from the first substrate, the optical axis direction of the second polaroid is a second direction, and the second direction is perpendicular to the first direction; the first substrate comprises a first alignment layer, the second substrate comprises a second alignment layer, and the absolute value range of an included angle between the alignment of the first alignment layer and the alignment of the second alignment layer in the same domain is 81-84 degrees. The embodiment of the application can improve the brightness and color difference existing between the left and right visual angles and the upper and lower visual angles, thereby reducing the color cast of the display panel.

Description

Display panel, display device and photoalignment method

Technical Field

The application relates to the technical field of display, in particular to a display panel, a display device and a photoalignment method.

Background

The existing thin film transistor (Thin Film Transistor, TFT) LCDs in the market are mostly backlight type liquid crystal displays, including a liquid crystal panel and a backlight module. The liquid crystal panel is composed of a Color Filter (CF), a TFT substrate and a liquid crystal layer, and the working principle of the liquid crystal panel is that liquid crystal molecules are placed in two parallel glass substrates, and the direction of the liquid crystal molecules is controlled to change by whether the glass substrates are electrified or not, so that light rays of a backlight module are refracted out to generate a picture.

The alignment control technique of the liquid crystal molecules can make the liquid crystal molecules in the panel in stable and uniform arrangement, and generally makes the liquid crystal molecules aligned by an alignment film. Photo-alignment is a non-contact alignment technique that irradiates linearly polarized light onto a photosensitive high molecular polymer alignment film to uniformly align liquid crystal molecules on a substrate in one direction, that is, to make the liquid crystal molecules have a certain tilt angle (pretilt angle) from the substrate surface.

The existing UV2A technology (ultraviolet vertical alignment technology) is a common means for liquid crystal alignment. Specifically, the TFT substrate (also called an array substrate) and the CF substrate (also called a color film substrate) are aligned for 2 times, respectively, so that the alignment of the TFT substrate and the alignment of the CF substrate are perpendicular to each other. In the related art, the phenomena of light and shade and color difference between the left and right viewing angles and the upper and lower viewing angles are easy to occur, and the color cast problem exists.

Disclosure of Invention

The application provides a display panel, a display device and a light alignment method, which are used for solving or relieving the technical problems of light and shade and color difference and larger color deviation of a left viewing angle, a right viewing angle, an upper viewing angle and a lower viewing angle in the related technology.

In a first aspect, embodiments of the present application provide a display panel, including:

a first substrate and a second substrate disposed opposite to each other;

a liquid crystal layer between the first substrate and the second substrate,

the first polaroid is positioned on one side of the first substrate far away from the second substrate, and the optical axis direction of the first polaroid is a first direction;

the second polaroid is positioned on one side of the second substrate far away from the first substrate, the optical axis taking direction of the second polaroid is a second direction, and the second direction is perpendicular to the first direction;

the first substrate comprises a first alignment layer, the second substrate comprises a second alignment layer, and the absolute value range of an included angle between the alignment of the first alignment layer and the alignment of the second alignment layer in the same domain is 81-84 degrees.

In one possible implementation, the alignment of the second alignment layer is perpendicular to the first direction, and the absolute value of the included angle between the alignment of the first alignment layer and the first direction in the same domain is in the range of 9 degrees to 6 degrees.

In one possible implementation manner, the first substrate is an array substrate, and the second substrate is a color film substrate;

the first substrate further comprises a first electrode layer, wherein the first electrode layer comprises a plurality of first slits;

the absolute value range of the included angle between the extending direction of the first slit and the first direction in the same domain is 80-89 degrees, and the interval range between any two adjacent first slits is 1-4 microns.

In one possible implementation manner, the first substrate is a color film substrate, and the second substrate is an array substrate;

The absolute value of the included angle between the extending direction of the first slit and the second direction in the same domain is in the range of 6-9 degrees.

In one possible implementation, the first substrate further includes a first electrode layer including a plurality of first slits;

The absolute value range of the included angle between the first slit and the first direction in the same domain is 80-89 degrees, and the interval range between any two adjacent first slits is 1-4 microns;

the second substrate further comprises a first electrode layer, wherein the first electrode layer comprises a plurality of second slits;

the absolute value of the included angle between the second slit and the second direction in the same domain is 80-89 degrees, and the interval between any two adjacent second slits is 1-4 microns.

In a second aspect, embodiments of the present application provide a display device, including: a backlight module and a display panel as described above;

the display panel is positioned on the light emitting side of the backlight module.

In a third aspect, an embodiment of the present application provides a photoalignment method, which is applied to a display panel as described above, including:

exposing 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;

exposing the first intermediate alignment layer based on third polarized light with an included angle between the polarized direction and the first polarized light being a first angle and fourth polarized light with an included angle between the polarized direction and the first polarized light being a second angle to obtain a second intermediate alignment layer; the absolute value range of the first angle and the second angle is 37 degrees to 53 degrees;

And exposing the second intermediate alignment layer based on fifth polarized light with the polarization direction perpendicular to the first polarized light to obtain a first alignment layer.

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

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

the exposure treatment is performed 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, and the method comprises the following steps: performing exposure alignment on the first domain and the fourth domain by using the first polarized light, and performing exposure alignment on the second domain and the third domain by using the second polarized light;

the exposure treatment is carried out on the first intermediate alignment layer based on third polarized light with an included angle between the polarized direction and the first polarized light being a first angle and fourth polarized light with an included angle between the polarized direction and the first polarized light being a second angle, so as to obtain a second intermediate alignment layer, and the exposure treatment comprises the following steps: performing exposure alignment on the first domain and the fourth domain by using the third polarized light, and performing exposure alignment on the second domain and the third domain by using the fourth polarized light;

The exposing treatment is carried out on the second intermediate alignment layer based on the fifth polarized light with the polarization direction perpendicular to the first polarized light to obtain a first alignment layer, and the method comprises the following steps: and carrying out exposure alignment on the third domain area and the fourth domain area by utilizing the fifth polarized light.

In one possible implementation manner, the exposing and aligning the first domain and the fourth domain with the first polarized light, and the exposing and aligning the second domain and the third domain with the second polarized light include:

performing exposure alignment on the first domain area and the fourth domain area by using the first polarized light of first exposure energy, and performing exposure alignment on the second domain area and the third domain area by using the second polarized light of the first exposure energy;

the exposing and aligning the first domain and the fourth domain by using the third polarized light, and exposing and aligning the second domain and the third domain by using the fourth polarized light, including:

performing exposure alignment on the first domain and the fourth domain by using the third polarized light of second exposure energy, and performing exposure alignment on the second domain and the third domain by 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 includes:

exposing and aligning the third domain area and the fourth domain area by using the fifth polarized light with third exposure energy; the third exposure energy is less than or equal to the second exposure energy.

The beneficial technical effects that technical scheme that this application embodiment provided brought include:

because the display panel comprises a first substrate, a second substrate, a liquid crystal layer, a first polaroid and a second polaroid, the first substrate and the second substrate are oppositely arranged, the liquid crystal layer is positioned between the first substrate and the second substrate, the first polaroid is positioned on one side of the first substrate far away from the second substrate, the optical axis direction of the first polaroid is a first direction, the second polaroid is positioned on one side of the second substrate far away from the first substrate, the optical axis direction of the second polaroid is a second direction, and the second direction is perpendicular to the first direction. That is, the display panel in the embodiment of the present application adopts the VA mode. In the VA mode, the absolute value range of the included 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 81-84 degrees, so that the absolute value of the included angle between the long axis of liquid crystal in the liquid crystal box and the horizontal direction approaches 45 degrees (namely 45+/-1 degrees), the absolute value of the included angle between the long axis of liquid crystal in the liquid crystal box and the horizontal direction in the related art is about 40 degrees, and the left and right viewing angles and the up and down viewing angles caused by the absolute value of the included angle are different in brightness and color, so that the color cast of the display panel is reduced.

Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.

Drawings

The foregoing and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

fig. 1 is a schematic diagram of alignment force for bonding an array substrate and a color film substrate in the related art.

Fig. 2 is a schematic diagram of a liquid crystal steering in the related art.

FIG. 3 is a graph showing the relationship between the difference of skin color and viewing angle at left and right viewing angles in the related art;

FIG. 4 is a graph showing the relationship between contrast ratio and viewing angle at left and right viewing angles in the related art;

FIG. 5 is a graph showing the relationship between the difference of skin color and viewing angle at the upper and lower viewing angles in the related art;

FIG. 6 is a graph showing the relationship between contrast ratio and viewing angle at upper and lower viewing angles in the related art;

FIG. 7 is a graph showing the relationship between the azimuth angle difference between the color film substrate and the array substrate and the azimuth angle of the liquid crystal;

FIG. 8 is a graph showing the relationship between the absolute value of the slit angle and the azimuth angle of the liquid crystal;

Fig. 9 is a schematic structural diagram of a display panel according to a first embodiment of the present disclosure;

fig. 10 is an alignment schematic diagram of a first substrate and a second substrate in a display panel according to a first embodiment of the present disclosure;

fig. 11 is a schematic structural diagram of a first electrode layer when a first substrate in a display panel according to a second embodiment of the present disclosure is an array substrate;

fig. 12 is another alignment schematic diagram of a first substrate and a second substrate in a display panel according to a second embodiment of the present disclosure;

fig. 13 is a schematic structural diagram of a first electrode layer in a display panel according to a second embodiment of the present disclosure when the first substrate and the array substrate are disposed opposite to each other;

fig. 14 is a schematic structural diagram of a display device according to a third embodiment of the present disclosure;

fig. 15 is a flowchart of a photoalignment method according to a fourth embodiment of the present application;

fig. 16 is a schematic diagram of step S11 when the photoalignment method according to the fourth embodiment of the present application is applied to an array substrate;

fig. 17 is a schematic diagram of step S12 when the photoalignment method according to the fourth embodiment of the present application is applied to an array substrate;

fig. 18 is a schematic diagram of step S13 when the photoalignment method according to the fourth embodiment of the present application is applied to an array substrate;

fig. 19 is an equivalent schematic diagram of step S12 and step S13 when the photoalignment method according to the fourth embodiment of the present application is applied to an array substrate;

Fig. 20 is a schematic diagram of step S11 when the photoalignment method according to the fourth embodiment of the present application is applied to a first substrate disposed opposite to an array substrate;

fig. 21 is a schematic diagram of step S12 when the photoalignment method according to the fourth embodiment of the present application is applied to a first substrate disposed opposite to an array substrate;

fig. 22 is a schematic diagram of step S13 when the photoalignment method according to the fourth embodiment of the present application is applied to a first substrate disposed opposite to an array substrate;

fig. 23 is an equivalent schematic diagram of step S12 and step S13 when the photoalignment method according to the fourth embodiment of the present application is applied to a first substrate disposed opposite to an array substrate.

Reference numerals:

100-a display panel;

11-a first substrate;

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

12-a second substrate;

121-a second substrate; 122-a second alignment layer; 123-a first electrode layer;

13-a liquid crystal layer;

14-a first polarizer;

15-a second polarizer;

a-a first domains; b-a second domain; c-a third domain; d-fourth domains;

^- an included angle is formed between the alignment of the color film substrate and the alignment of the array substrate;

an included angle between the extending direction of the alpha-first slit and the first direction;

10-a backlight module;

u1-first polarized light;

u2-second polarized light;

u3-third polarized light;

u4-fourth polarized light;

u5-fifth polarized light;

w is the first direction;

v-a second direction;

alignment of X1 and X2-color film substrates;

alignment of Y1 and Y2-array substrates;

an extending direction of the L-first slit;

x-horizontal direction;

y-vertical direction.

Detailed Description

Embodiments of the present application are described below with reference to the drawings in the present application. It should be understood that the embodiments described below with reference to the drawings are exemplary descriptions for explaining the technical solutions of the embodiments of the present application, and the technical solutions of the embodiments of the present application are not limited.

As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless expressly stated otherwise, as understood by those skilled in the art. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of other features, information, data, steps, operations, elements, components, and/or groups thereof, etc. that may be implemented as desired in the art. The term "and/or" as used herein refers to at least one of the items defined by the term, e.g., "a and/or B" may be implemented as "a", or as "B", or as "a and B".

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, the embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

The liquid crystal display panel is generally composed of a color film substrate (Color Filter Substrate, CF substrate), a thin film transistor array substrate (Thin Film Transistor ArraySubstrate, TFT substrate), and a liquid crystal layer (Liquid Crystal Layer) disposed between the two substrates. The working principle is that the rotation of liquid crystal molecules of a liquid crystal layer is controlled by applying driving voltage on two glass substrates, and light rays of a backlight module are refracted out to generate pictures. Liquid crystal display panels currently on the mainstream market can be classified into the following types according to the alignment manner of liquid crystals: vertical alignment (Vertical Alignment, VA), twisted Nematic (TN) or super Twisted Nematic (Super Twisted Nematic, STN), in-plane switching (In-PlaneSwitching, IPS), fringe field switching (Fringe Field Switching, FFS) types.

For VA mode, the liquid crystal display device mainly consists of an upper substrate, a lower substrate, and negative liquid crystal molecules sandwiched between the two substrates. Transparent conductive layers (indium tin oxide, ITO) are arranged on the inner sides of the upper substrate and the lower substrate, so that a vertical electric field can be formed. The negative liquid crystal embedded between the two transparent conductive layers is aligned perpendicular to the surface of the substrate under the condition that no vertical electric field acts, and when the vertical electric field acts, the liquid crystal molecules are aligned in a specific direction, and finally are aligned perpendicular to the direction of the electric field.

The VA mode has the advantages of high contrast ratio and high transmittance, but because the VA mode adopts vertically rotated liquid crystal, the difference of birefringence of liquid crystal molecules is relatively large, which results in poor viewing angle and serious color cast problem under large viewing angle, the VA mode generally adopts a multi-domain VA technology, i.e. one sub-pixel is divided into a plurality of areas (i.e. a plurality of domain areas), and the rotation angles of the liquid crystal molecules in each area are different after voltage is applied, so that the color cast problem is improved.

Fig. 1 is a schematic diagram of alignment force for bonding an array substrate and a color film substrate in the related art. The color film substrate 30 is obtained after 2 times of exposure and alignment of the array substrate 20 obtained after 2 times of exposure and alignment. The alignment force after the array substrate 20 and the color film substrate 30 are attached is schematically shown on the rightmost side in fig. 3 in such a way that the film surface of the array substrate 20 faces upwards (the array substrate 20 is closer to the outside of the paper than the color film substrate 30).

The inventor found that the UV2A process (ultraviolet vertical alignment process) in the related art performs alignment for 2 times on a TFT substrate (also called array substrate) and a CF substrate (also called color film substrate), the liquid crystal molecules are twisted at different angles, dark lines appear in the region rotated by more than 90 °, a "swamp" dark line is formed on the display panel, the dark line causes a great loss of transmittance, and the transmittance loss becomes worse with the decrease of the pixel size.

Referring to fig. 2, fig. 2 is a schematic diagram of liquid crystal turning in the related art. The TFT side liquid crystal turning indicates the turning of molecules in the liquid crystal layer under the action of the alignment force of the array substrate, the CF side liquid crystal turning indicates the turning of molecules in the liquid crystal layer under the action of the alignment force of the color film substrate, the liquid crystal layer molecular intermediate state indicates the turning of liquid crystal molecules under the combined action of the array substrate and the color film substrate, and the dark line indicates the region where the transmittance of the liquid crystal molecules is extremely small when the liquid crystal molecules are rotated by more than 90 degrees.

In addition, the inventor also found that the absolute value of the included angle between the long axis of the liquid crystal in the liquid crystal box and the horizontal direction in the related art is about 40 degrees, so that the left and right viewing angles and the up and down viewing angles have light and shade and color difference, and the color cast problem exists.

For the UV2A process in the related art, in the VA mode, color cast specifications generally take Skin Color difference and CR (80/20) (contrast, light and shade representation) as judging bases, wherein the specifications are CR (80/20) more than or equal to 30% at a viewing angle of +/-30 degrees, and Skin Color less than or equal to 0.02 at a viewing angle of +/-30 degrees.

Fig. 3 is a graph showing the relationship between skin color difference and viewing angle at left and right viewing angles in the related art.

Fig. 4 is a graph showing the relationship between contrast ratio and viewing angle at left and right viewing angles in the related art.

Fig. 5 is a graph showing the relationship between the difference in skin color and viewing angle at the upper and lower viewing angles in the related art.

Fig. 6 is a graph showing the relationship between contrast ratio and viewing angle at upper and lower viewing angles in the related art.

It was found that Skin Color was found to be 0.0161 and CR (80/20) was found to be 36.44% at a viewing angle of about.+ -. 30 ℃. Skin Color was found to be 0.0283 and CR (80/20) was found to be 24.61% at an angle of up + -30 deg.. It can be seen that the color deviation level difference is obvious in the up and down visual angles, and the brightness and color difference between the left and right visual angles and the up and down visual angles is obvious.

The inventors measured the azimuth angle in the plane of the display panel obtained by the related art, and found that the absolute value of the angle between the long axis of the liquid crystal and the horizontal direction was about 40 °. In combination with the current azimuth condition, the azimuth angle in the liquid crystal box slightly leans to the exposure angle of the color film substrate, so that the azimuth angle of the liquid crystal is required to be adjusted by an exposure mode, and the brightness and color difference between the left and right viewing angles and the upper and lower viewing angles are obviously improved.

The inventors further found that, as shown in fig. 7, the azimuth angle difference between the color film substrate and the array substrate was plotted against the azimuth angle of the liquid crystal. The azimuth angle difference between the color film substrate and the array substrate refers to the absolute value of an included angle between the alignment of the alignment layer of the color film substrate and the alignment of the alignment layer of the array substrate.

The inventors have also found that, as shown in fig. 8, the absolute value of the angle of the Slit (i.e., ITO Slit) of the transparent conductive layer (indium tin oxide, ITO) is plotted against the azimuth angle of the liquid crystal.

Specifically, fig. 7 and 8 are applicable to liquid crystal layers having CELL GAP (CELL thickness) of 3.0 micrometers to 3.4 micrometers.

The following describes the technical solutions of the present application and how the technical solutions of the present application solve the above technical problems in detail with specific embodiments. It should be noted that the following embodiments may be referred to, or combined with each other, and the description will not be repeated for the same terms, similar features, similar implementation steps, and the like in different embodiments.

The first embodiment of the present application provides a display panel 100, as shown in fig. 9, including: the liquid crystal display comprises a first substrate 11, a second substrate 12, a liquid crystal layer 13, a first polaroid 14 and a second polaroid 15, wherein the first substrate 11 and the second substrate 12 are oppositely arranged, the liquid crystal layer 13 is positioned between the first substrate 11 and the second substrate 12, the first polaroid 14 is positioned on one side of the first substrate 11 far away from the second substrate 12, the optical axis direction of the first polaroid 14 is a first direction W, the second polaroid is positioned on one side of the second substrate far away from the first substrate, the optical axis direction of the second polaroid is a second direction V, and the second direction V is perpendicular to the first direction W.

The first substrate comprises a first alignment layer, the second substrate comprises a second alignment layer, and the absolute value of an included angle between the alignment of the first alignment layer and the alignment of the second alignment layer in the same domain is in the range of 81-84 degrees.

The optical axis direction of the first polarizer is a first direction W, the optical axis direction of the second polarizer is a 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.

Referring to fig. 7, the liquid crystal azimuth angle approaches 45 ° (i.e., 45 ° ± 1 °) when the azimuth angle difference between the first substrate and the second substrate is 81 to 84 degrees. Therefore, in the VA mode, the absolute value of the included 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 included angle between the long axis of the liquid crystal in the liquid crystal box and the horizontal direction approaches 45 degrees, and the absolute value of the included angle between the long axis of the liquid crystal in the liquid crystal box and the horizontal direction in the related art is improved to be about 40 degrees, and the left and right viewing angles and the up and down viewing angles have light and shade and color differences, so that the color cast of the display panel is reduced; meanwhile, the absolute value of the included angle between the long axis of the liquid crystal in the liquid crystal box and the horizontal direction is close to 45 degrees, so that the rotating angle of liquid crystal molecules cannot exceed 90 degrees, the phenomenon of dark fringes at the edge can be effectively improved, and the light transmittance of the backlight module is improved.

With continued reference to fig. 9, the first substrate 11 includes a first substrate 111 and a first alignment layer 112 located on a side of the first substrate 111 adjacent to the second substrate 12. The second substrate 12 includes a second substrate 121 and a second alignment layer 122 located on a side of the second substrate 121 near the first substrate 11.

Optionally, the first substrate 11 further includes a first electrode layer 113, and the first electrode layer 113 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, transparent conductive layer), the second electrode layer 123 being located between the second substrate 121 and the second alignment layer 122. Wherein, the first electrode layer 113 and the second electrode layer 123 may each be a transparent conductive layer, for example, an indium tin oxide layer (ITO layer).

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

That is, the second alignment layer adopts the existing UV2A process (two exposure alignment is performed by respectively using two polarized lights with opposite polarization directions), and the first alignment layer adjusts the initial azimuth angle of the surface of the first substrate to be 9 to 6 degrees in the absolute value range of the included angle in the same domain with the first direction through synthetic exposure, so that the absolute value range of the included angle between the alignment of the first alignment layer and the alignment of the second alignment layer in the same domain is 81 to 84 degrees, and the azimuth angle in the liquid crystal box is close to 45 degrees.

Referring to fig. 7, when the azimuth difference between the first substrate and the second substrate is 90 °, the azimuth of the liquid crystal layer is measured to be about 40 °. In order to obtain the azimuth angle of the liquid crystal layer of 45 degrees, according to a large amount of experimental data analysis, when the azimuth angle difference between the first substrate and the second substrate is 81-84 degrees, the influence of the alignment force of one side substrate (for example, the first substrate) of the liquid crystal layer on the alignment layer of the other side substrate (for example, the second substrate) can be effectively reduced, so that the azimuth angle of the liquid crystal layer is more approximate to 45 degrees (namely, 45+/-1 degrees).

Alternatively, in this embodiment, the absolute value range of the included angle between the alignment of the first alignment layer and the alignment of the second alignment layer in the same domain may be 82 degrees. That is, the absolute value of the included angle between the alignment of the first alignment layer and the first direction in the same domain is 8 degrees. Referring to fig. 7, the liquid crystal azimuth angle is 45 ° when the azimuth angle difference between the first substrate and the second substrate is 82 °.

Referring to fig. 10, in the display panel 100 of the present embodiment, the first substrate may be an array substrate, the second substrate may be a color film substrate or other substrates including the second alignment layer (in this case, the array substrate and the color film substrate may be located on the same side of the liquid crystal layer). That is, the first substrate adopts the existing UV2A process, and the alignment of the first substrate is X1 and X2 (X1 and X2 are parallel to the horizontal direction X). The array substrate adjusts the initial azimuth angle of the surface of the array substrate through synthetic exposure, so that the azimuth angle in the liquid crystal box is changed, and the alignment of the array substrate is Y1 and Y2.

With continued reference to fig. 10, four domains in the same sub-pixel of the display panel are a first domain a, a second domain b, a third domain c, and a fourth domain d, respectively. In the first domain area a, the alignment of the first substrate is X1, the alignment of the array substrate is Y1, and the included angle between the two is

In the second domain b, the first substrate has an alignment of X1, the array substrate has an alignment of Y2, and the included angle between the two is +.>

In the third domain c, the first substrate has an alignment of X2, the array substrate has an alignment of Y1, and the angle between the two is +.>

In the fourth domain d, the first substrate has an alignment of X2, the array substrate has an alignment of Y2, and the included angle between the two is +.>

Namely, in four domains a, b, c, 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 values of (a) are all in the range of 81 degrees to 84 degrees.

Referring to fig. 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 an absolute value of an included angle α between an extending direction L of the first slits 113a and a first direction W (parallel to a horizontal direction at this time) in the same domain is in a range of 80 degrees to 89 degrees.

Optionally, the pitch between any two adjacent first slits 113a ranges from 1 micron to 4 microns, wherein the pitch between any two adjacent first slits 113a characterizes the distance of any two adjacent first slits 113a in a direction perpendicular to the extending direction L of the first slits 113 a.

That is, the absolute value of the angle α between the extending direction L of the first slit 113a and the horizontal direction in fig. 11 ranges from 80 degrees to 89 degrees, in other words, the absolute value of the angle between the extending direction L of the first slit 113a and the vertical direction in the same domain ranges from 1 degree to 10 degrees.

Referring to fig. 8, when the absolute value of the angle of the slit of the transparent conductive layer is 1 to 10 degrees, the azimuth angle of the liquid crystal is close to 45 degrees, so that the color cast problem can be further improved.

With continued reference to fig. 11, in practical application, in four domains a, b, c, d of the same sub-pixel of the display panel, the extending directions L of the first slits 113a in adjacent domains are axisymmetrically arranged.

Correspondingly, the second substrate includes a whole layer of the second electrode layer (excluding the Slit, for example, may be a whole layer of the ITO layer), and the whole layer of the second electrode layer of the second substrate and the first electrode layer of the array substrate having the Slit (i.e., the ITO Slit) may form an electric field. Liquid crystal molecules (for example, negative liquid crystal) embedded between the first electrode layer and the second electrode layer are aligned in a specific direction under the action of an electric field, so that the azimuth angle of the liquid crystal molecules in the liquid crystal box is further ensured to be close to 45 degrees.

It should be noted that, since the alignment layer of the array substrate adjusts the initial azimuth angle of the surface by synthesizing the exposure, and the first electrode layer of the array substrate is provided with the first Slit (i.e., ITO Slit), both measures are located at one side of the array substrate, the first Slit of the first electrode layer can be better matched with the first alignment layer, so that the azimuth angle of the liquid crystal cell can tend to be more ideal 45 degrees.

Of course, when the alignment layer of the array substrate synthesizes the initial azimuth angle of the exposure adjustment surface, one side of the array substrate can be provided with the whole first electrode layer, the second electrode layer of the second substrate is provided with the electrode layer with the second slit, and at this time, the second slit of the second electrode layer can also enable the azimuth angle of the liquid crystal box to be more close to an ideal 45 degrees to a certain extent.

Alternatively, the absolute value of the included angle between the extending direction of the first slit 113a and the second direction in the same domain is in the range of 6 degrees to 9 degrees. At this time, the absolute value of the angle between the extending direction L of the first slit 113a and the horizontal direction in the same domain is 81 to 84 degrees, and the absolute value of the angle between the extending direction L of the slit and the vertical direction in the same domain is 6 to 9 degrees. By doing so, it is possible to achieve an azimuth angle of the liquid crystal molecules in the liquid crystal cell closer to 45 degrees (i.e., 45++1°). Referring to fig. 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 °.

In this embodiment, the absolute value of the angle between the extending direction of the first slit 113a and the second direction in the same domain may be 8 degrees, so that the azimuth angle of the liquid crystal is more approximate to 45 degrees. Referring to fig. 8, when the absolute value of the angle of the transparent conductive layer (i.e., the absolute value of the angle between the extending 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.

in the VA mode, the absolute value range of the included 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 81-84 degrees, so that the absolute value of the included angle between the long axis of liquid crystal in the liquid crystal box and the horizontal direction approaches 45 degrees, the absolute value of the included angle between the long axis of liquid crystal in the liquid crystal box and the horizontal direction is about 40 degrees in the related art, the left and right visual angles and the up and down visual angles which are caused have light and shade and color differences can be improved, and the color cast of the display panel is reduced; meanwhile, the absolute value of the included angle between the long axis of the liquid crystal in the liquid crystal box and the horizontal direction is close to 45 degrees, so that the rotating angle of liquid crystal molecules cannot exceed 90 degrees, the phenomenon of dark fringes at the edge can be effectively improved, and the light transmittance of the backlight module is improved.

The second embodiment of the present application provides a display panel, see fig. 12, and the main difference is that the second substrate may be an array substrate, the first substrate may be a color film substrate, or other substrates including the second alignment layer (at this time, the array substrate and the color film substrate may be located on the same side of the liquid crystal layer).

That is, the array substrate adopts the existing UV2A process, and the array substrate has the alignment of Y1 and Y2 (both Y1 and Y2 are parallel to the vertical direction Y). The first substrate adjusts the initial azimuth angle of the surface of the color film substrate through synthetic exposure, so that the azimuth angle in the liquid crystal box is changed, and the alignment of the first substrate is X1 and X2.

With continued reference to fig. 12, four domains in the same sub-pixel of the display panel are a first domain a, a second domain b, a third domain c, and a fourth domain d, respectively. In the first domain area a, the alignment of the first substrate is X1, the alignment of the array substrate is Y1, and the included angle between the two is

In the fourth domain d, the first substrate has an alignment of X2, the array substrate has an alignment of Y2, and the included angle between the two is +. >

That is, four of the same sub-pixels in the display panelIn the domains a, b, c and d, the included angle between the alignment of the first substrate and the alignment of the array substrate is +.>

And all ranges from 81 degrees to 84 degrees.

Referring to fig. 13, the first substrate includes a first electrode layer 113, and the first electrode layer 113 may include a plurality of first slits 113a (i.e., ITO Slit). At this time, the absolute value of the included angle β between the extending direction of the first slit 113a and the first direction W (parallel to the vertical direction at this time) in the same domain is in the range of 80 degrees to 89 degrees.

That is, the absolute value of the angle β between the extending direction L of the first slit 113a and the vertical direction in fig. 13 ranges from 80 degrees to 89 degrees, in other words, the absolute value of the angle between the extending direction L of the first slit 113a and the horizontal direction in the same domain ranges from 1 degree to 10 degrees.

With continued reference to fig. 13, in practical applications, in four domains a, b, c, d of the same sub-pixel of the display panel, the extending directions L of the first slits 113a in adjacent domains are axisymmetrically arranged.

Correspondingly, the array substrate comprises a whole first electrode layer (without slits, a whole first electrode layer), and the whole first electrode layer of the array substrate and the first electrode layer of the color film substrate with slits (namely, ITO Slit) can form an electric field. Liquid crystal molecules (for example, negative liquid crystal) embedded between the two first electrode layers are aligned in a specific direction under the action of an electric field, so that the azimuth angle of the liquid crystal molecules in the liquid crystal box is further ensured to be close to 45 degrees.

It should be noted that, since the first alignment layer of the first substrate (e.g., color film substrate) adjusts the initial azimuth angle of the surface by synthesizing the exposure, and the first Slit (i.e., ITO Slit) provided on the first electrode layer of the first substrate, both measures are located on one side of the first 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 cell can tend to be more ideal 45 degrees. In other words, the angle of the alignment layer and the slit of the first substrate (e.g. color film substrate) in this embodiment are similar to those of the array substrate, and the alignment layer and the slit with the changed angle are both disposed on the same side in structure, so the change rule of the azimuth angle of the liquid crystal cell in this embodiment is similar to that of fig. 8.

Of course, when the alignment layer of the first substrate is used to synthesize the initial azimuth angle of the exposure adjustment surface, one side of the first substrate may be provided with the whole first electrode layer, and the second electrode layer of the second substrate is provided with the electrode layer having the second slit, so that the azimuth angle of the liquid crystal cell can be more approximately 45 degrees to a certain extent.

Alternatively, the absolute value of the included angle between the extending direction of the first slit 113a and the second direction in the same domain is in the range of 6 degrees to 9 degrees. At this time, the absolute value of the angle between the extending direction L of the first slit 113a and the horizontal direction in the same domain is 81 to 84 degrees, and the absolute value of the angle between the extending direction L of the slit and the vertical direction in the same domain is 6 to 9 degrees. By doing so, it is possible to achieve an azimuth angle of the liquid crystal molecules in the liquid crystal cell closer to 45 degrees (i.e., 45++1°).

In this embodiment, the absolute value of the angle between the extending direction of the first slit 113a and the second direction in the same domain may be 8 degrees, so that the azimuth angle of the liquid crystal is more approximate to 45 degrees. Referring to fig. 8, 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.

In the VA mode, the absolute value range of the included 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 81-84 degrees, so that the absolute value of the included angle between the long axis of liquid crystal in the liquid crystal box and the horizontal direction approaches 45 degrees, the absolute value of the included angle between the long axis of liquid crystal in the liquid crystal box and the horizontal direction is about 40 degrees in the related art, the left and right visual angles and the up and down visual angles which are caused have light and shade and color differences can be improved, and the color cast of the display panel is reduced; meanwhile, the absolute value of the included angle between the long axis of the liquid crystal in the liquid crystal box and the horizontal direction is close to 45 degrees (namely, 45 degrees plus or minus 1 degree), so that the rotation angle of liquid crystal molecules cannot exceed 90 degrees, the phenomenon of dark fringes at the edge can be effectively improved, and the light transmittance of the backlight module is improved.

In other possible embodiments, the array substrate and the color film substrate may each include an electrode layer having slits. The first substrate is taken as an array substrate as an example.

Specifically, the first substrate 11 further includes a first electrode layer 113, and the first electrode layer 113 includes a plurality of first slits. The absolute value of the included angle between the first slits and the first direction in the same domain is 80-89 degrees, and the interval between any two adjacent first slits is 1-4 microns.

That is, the absolute value of the included angle between the extending direction of the first slit of the array substrate and the vertical direction in the same domain is 1 to 10 degrees. Optionally, the absolute value of the included angle between the extending direction of the first slit of the array substrate and the vertical direction in the same domain is in the range of 6 degrees to 9 degrees.

The second substrate 12 may further include a second electrode layer 123, and the second electrode layer 113 includes a plurality of second slits. The absolute value of the included angle between the second slits and the second direction in the same domain is 80-89 degrees, and the interval between any two adjacent second slits is 1-4 microns.

That is, the absolute value of the included angle between the extending direction of the second slit of the second substrate and the horizontal direction in the same domain is 1 to 10 degrees. Optionally, the absolute value of the included angle between the extending direction of the second slit of the second substrate and the horizontal direction in the same domain is in the range of 6 degrees to 9 degrees.

In this embodiment, the absolute value range of the included angle between the extending direction of the first slit 113a and the second direction in the same domain may be 8 degrees, and the absolute value of the included angle between the extending direction of the second slit of the second substrate and the horizontal direction in the same domain may be 8 degrees, so that the azimuth angle of the liquid crystal is more approximate to 45 degrees. Referring to fig. 8, 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.

Through setting the two sides of the array substrate and the second substrate as the electrode layers with slits, the steering of liquid crystal molecules can be corrected from two directions, and the absolute value of the included angle between the long axis of liquid crystal in the liquid crystal box and the horizontal direction is further ensured to be approximately 45 degrees, so that the brightness and color difference between the left and right visual angles and the up and down visual angles are improved.

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

Based on the same inventive concept, a third embodiment of the present application provides a display device, as shown in fig. 14, including: the backlight module 10 and the display panel as described above are disposed on the light emitting side of the backlight module 10.

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 arrangement is described in the foregoing embodiments, and will not be described herein.

In this embodiment, the backlight module 10 may be disposed on a side of the display panel 100 near the first polarizer 14.

Since the present embodiment is an example of a display device corresponding to the display panel, the technical details in the example of the display panel are still applicable in the example, and the present embodiment can achieve similar technical effects as the example of the display panel, which is not repeated here.

Based on the same inventive concept, a fourth embodiment of the present application provides a photoalignment method applied to the display panel described above, as shown in fig. 15, including:

s11: and exposing 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.

S12: and performing exposure treatment on the first intermediate alignment layer based on third polarized light with an included angle between the polarization direction and the first polarized light being a first angle and fourth polarized light with an included angle between the polarization direction and the first polarized light being a second angle, so as to obtain a second intermediate alignment layer.

Wherein the absolute value of the first angle and the second angle are in the range of 37 degrees to 53 degrees.

S13: and exposing the second intermediate alignment layer based on fifth polarized light with the polarization direction perpendicular to the first polarized light to obtain the first alignment layer.

Through the steps, an included angle of 6-9 degrees exists between the alignment of the first alignment layer of the first substrate and the vertical direction (the vertical direction is perpendicular to the alignment of the second alignment layer of the second substrate), so that the absolute value of the included 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 after alignment is ensured to be 81-84 degrees in the same domain region, the absolute value of the included angle between the long axis of liquid crystal in the liquid crystal box and the horizontal direction is enabled to approach 45 degrees, the absolute value of the included angle between the long axis of liquid crystal in the liquid crystal box and the horizontal direction in the related technology is improved to be about 40 degrees, and the resulting left and right visual angles and the up and down visual angles have light and shade and color differences, so that the color deviation of a display panel is reduced.

It should be noted that, by executing step S12 first and then executing step S13, only a part of the domains in step S13 are aligned by exposure, the alignment of a part of the domains in the second intermediate alignment layer obtained in step S12 can be adjusted, so that the alignment of four domains of the first substrate is different, and the problem that it is difficult to form four domains with different alignments is solved.

Alternatively, the second alignment layer may be obtained by performing exposure treatment on the second alignment material film of the second substrate based on the sixth polarized light and the seventh polarized light having the polarization directions perpendicular to the first polarized light and opposite to each other.

In this embodiment, the first base may be an array substrate. At this time, the first polarized light and the second polarized light are in the vertical direction.

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

Referring to fig. 16, step S11 may include: the first polarized light U1 is used for exposing and aligning the first domain a and the fourth domain d, and the second polarized light U2 is used for exposing and aligning the second domain b and the third domain c.

Referring to fig. 17, step S12 may include: the first domain a and the fourth domain d are subjected to exposure alignment by using the third polarized light U3, and the second domain b and the third domain c are subjected to exposure alignment by using the fourth polarized light U4.

Referring to fig. 18, step S13 may include: and performing exposure alignment on the third domain c and the fourth domain d by using fifth polarized light U5.

In this embodiment, in step S13, exposure alignment may be performed on only the third domain c and the fourth domain d by using the fifth polarized light U5, and exposure alignment may not be performed on the first domain a and the second domain b.

At this time, the exposure alignment of step S12 and step S13 may be equivalent to the exposure alignment shown in fig. 19. The alignment schematic diagram of the first alignment layer obtained after step S11, step S12 and step S13 is shown in fig. 10.

Further, in this embodiment, step S11 may include: and performing exposure alignment on the first domain and the fourth domain by using first polarized light of first exposure energy, and performing exposure alignment on the second domain and the third domain by using second polarized light of the first exposure energy.

In this embodiment, the first exposure energy may be in the range of 18 to 22J/cm ² (joules per square centimeter). Alternatively, it may be 19J/cm ² 、20J/cm ² 、21J/cm ² 。

In this step, the polarizer may be separated by PBS (Polarization Beam Splitter) to obtain the first polarized light and the second polarized light.

Step S12 may include: and performing exposure alignment on the first domain and the fourth domain by using third polarized light of second exposure energy, and performing exposure alignment on the second domain and the third domain by using fourth polarized light of second exposure energy.

Wherein the second exposure energy is 0.15 times to 0.35 times the first exposure energy. In this embodiment, the second exposure energy may be in the range of 3 to 7J/cm ² (joules per square centimeter). Alternatively, it may be 4J/cm ² 、5J/cm ² 、6J/cm ² 。

In this step, WGP (Wire Grid Polarize, wire grid polarizer) may be used to obtain light of the third polarization and light of the fourth polarization.

Step S13 may include: exposing and aligning the third domain area and the fourth domain area by using fifth polarized light of third exposure energy; the third exposure energy is less than or equal to the second exposure energy.

Wherein the third exposure energy is lower (may be slightly lower) or equal to the second exposure energy. In the present embodiment, the third exposure energy may be in the range of 2 to 6J/cm ² (joules per square centimeter). Alternatively, it may be 3J/cm ² 、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 treatment in step S13 can have an excessive influence on the alignment of the first substrate, resulting in an overcorrect azimuth angle The absolute value range of the included angle between the finally obtained 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 area is 81-84 degrees, so that the absolute value of the included angle between the long axis of liquid crystal in the liquid crystal box and the horizontal direction is more approximate to 45 degrees, and the brightness and color difference between the left and right visual angles and the up and down visual angles are improved.

In this step, PBS (Polarization Beam Splitter, plate separation polarizer) may be used to obtain the first five polarized light.

That is, among three sets of exposure processes (a first exposure process, a second exposure process, and a third exposure process) performed on the first substrate, the exposure energy of the second exposure process is 0.15 to 0.35 times that of the first exposure process, and the exposure energy of the third exposure process is lower than or equal to that of the second exposure process.

In other possible embodiments, the first substrate may be a substrate disposed opposite the array substrate. At this time, the first polarized light and the second polarized light are in the horizontal direction.

Referring to fig. 20, step S11 may include: the first polarized light U1 is used for exposing and aligning the first domain a and the second domain b, and the second polarized light U2 is used for exposing and aligning the third domain c and the fourth domain d.

Referring to fig. 21, step S12 may include: the first domain a and the second domain b are subjected to exposure alignment by using third polarized light U3, and the third domain c and the fourth domain d are subjected to exposure alignment by using fourth polarized light U4.

Referring to fig. 22, step S13 may include: and performing exposure alignment on the second domain b and the third domain c by using fifth polarized light U5.

At this time, the exposure alignment of step S12 and step S13 may be equivalent to the exposure alignment shown in fig. 23. The alignment schematic diagram of the first alignment layer obtained after step S11, step S12 and step S13 is shown in fig. 12.

Specific exposure energy is described above, and 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 are not described here again.

In practical applications, the optical alignment method in this embodiment may be used to obtain the display panel in the foregoing embodiment, so technical details in the display panel embodiment are still applicable in this embodiment, and are not repeated herein.

The beneficial technical effects that technical scheme that this application embodiment provided brought include: by the optical alignment method, an included angle of 6-9 degrees exists between the alignment of the first alignment layer of the first substrate and the vertical direction (the vertical direction is perpendicular to the alignment of the second alignment layer of the second substrate), so that the absolute value of the included 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 after alignment is 81-84 degrees in the same domain area, the absolute value of the included angle between the long axis of liquid crystal in the liquid crystal box and the horizontal direction is approximate to 45 degrees (namely, 45+/-1 degrees), the absolute value of the included angle between the long axis of liquid crystal in the liquid crystal box and the horizontal direction in the related art is improved to be about 40 degrees, and the resulting left and right viewing angles and up and down viewing angles have light and color differences, so that the color bias of the display panel is reduced.

Those of skill in the art will appreciate that the various operations, methods, steps in the flow, actions, schemes, and alternatives discussed in the present application may be alternated, altered, combined, or eliminated. Further, other steps, means, or steps in a process having various operations, methods, or procedures discussed in this application may be alternated, altered, rearranged, split, combined, or eliminated. Further, steps, measures, schemes in the related art having various operations, methods, flows disclosed in the present application may also be alternated, altered, rearranged, decomposed, combined, or deleted.

In the description of the present application, the directions or positional relationships indicated by the words "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., are based on the exemplary directions or positional relationships shown in the drawings, are for convenience of description or simplifying the description of the embodiments of the present application, and do not indicate or imply that the apparatus or components referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application.

The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.

In the description of the present specification, a particular feature, structure, material, or characteristic may be combined in any suitable manner in one or more embodiments or examples.

It should be understood that, although the steps in the flowcharts of the figures are shown in order as indicated by the arrows, the order in which the steps are performed is not limited to the order indicated by the arrows. In some implementations of embodiments of the present application, the steps in each flow may be performed in other orders as desired, unless explicitly stated herein. Moreover, some or all of the steps in the flowcharts may include multiple sub-steps or multiple stages based on the actual implementation scenario. Some or all of the sub-steps or stages may be executed at the same time, or may be executed at different times, where the execution sequence of the sub-steps or stages may be flexibly configured according to the requirements, which is not limited by the embodiment of the present application.

The foregoing is only a part of the embodiments of the present application, and it should be noted that, for those skilled in the art, other similar implementation means based on the technical ideas of the present application are adopted without departing from the technical ideas of the solutions of the present application, and also belong to the protection scope of the embodiments of the present application.

Claims

1. A display panel, comprising:

a first substrate and a second substrate disposed opposite to each other;

a liquid crystal layer between the first substrate and the second substrate,

2. The display panel according to claim 1, wherein the alignment of the second alignment layer is perpendicular to the first direction, and an absolute value of an included angle between the alignment of the first alignment layer and the first direction in the same domain is in a range of 9 degrees to 6 degrees.

3. The display panel of claim 2, wherein the first substrate is an array substrate;

4. The display panel of claim 2, wherein the second substrate is an array substrate;

5. The display panel according to claim 3 or 4, wherein an absolute value of an included angle between the extending direction of the first slit and the second direction in the same domain is in a range of 6 degrees to 9 degrees.

6. The display panel of claim 1, wherein the first substrate further comprises a first electrode layer comprising a plurality of first slits;

the second substrate further comprises a second electrode layer, and the second electrode layer comprises a plurality of second slits;

7. A display device, comprising: a backlight module and a display panel according to any one of claims 1 to 6;

8. A photoalignment method, characterized by being applied to the display panel according to any of claims 1 to 6, comprising:

9. The photoalignment method according to claim 8, wherein the display panel comprises a plurality of sub-pixels, each sub-pixel comprising at least four domains arranged in an array;

10. The photoalignment method according to claim 8, wherein performing exposure alignment on the first domain and the fourth domain using the first polarized light and performing exposure alignment on the second domain and the third domain using the second polarized light comprises: