CN109445195B - Optical alignment method of display substrate, display substrate and liquid crystal display panel - Google Patents

Optical alignment method of display substrate, display substrate and liquid crystal display panel Download PDF

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CN109445195B
CN109445195B CN201811564861.7A CN201811564861A CN109445195B CN 109445195 B CN109445195 B CN 109445195B CN 201811564861 A CN201811564861 A CN 201811564861A CN 109445195 B CN109445195 B CN 109445195B
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alignment film
sub
alignment
substrate
optical module
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CN109445195A (en
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卢丽君
张振铖
任玮
李静
邱英彰
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Xiamen Tianma Microelectronics Co Ltd
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Xiamen Tianma Microelectronics Co Ltd
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/13378—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation
    • G02F1/133788—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation by light irradiation, e.g. linearly polarised light photo-polymerisation
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/133711—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by organic films, e.g. polymeric films

Abstract

The invention provides a photo-alignment method of a display substrate, the display substrate and a liquid crystal display panel, wherein the display substrate comprises a display area and an optical partThe module setting area, the display area is at least partly around the optical module setting area, and the optical alignment method includes: providing a substrate base plate; coating alignment liquid on one side of a substrate; the alignment liquid covers the display area and the optical module setting area; irradiating the alignment liquid in the display area by using light with a first energy density and irradiating the alignment liquid in the optical module setting area by using light with a second energy density to form an alignment film, wherein the first energy density is not equal to the second energy density; wherein the part of the alignment film in the display region is a first sub-alignment film, the part of the alignment film in the optical module setting region is a second sub-alignment film, and the chromaticity of the first sub-alignment film is (X)1，Y1) The chromaticity of the second sub-alignment film is (X)2，Y2)，X1＞X2，Y1＞Y2. The invention realizes the consistency of the chromaticity of the optical module setting area and the display area.

Description

Optical alignment method of display substrate, display substrate and liquid crystal display panel
Technical Field
The invention relates to the technical field of display, in particular to a photo-alignment method of a display substrate, the display substrate and a liquid crystal display panel.
Background
With the development of scientific technology and the progress of society, people have increasingly relied on information exchange and transmission, and displays as main carriers and material bases for information exchange and transmission become hot spots for research of many scientists.
In order to realize functions such as image capturing, an optical function module is often placed in an optical module installation area. The optical module setting area and the display area have different transmittance spectrums, so that the chromaticity of the optical module setting area is inconsistent with that of the display area. Specifically, under the irradiation of the same light source, the light emitted through the display area is white light, and the light emitted through the optical module setting area is yellow light.
Disclosure of Invention
The invention provides a photo-alignment method of a display substrate, the display substrate and a liquid crystal display panel, which are used for realizing the consistency of the chromaticity of an optical module setting area and the chromaticity of a display area.
In a first aspect, an embodiment of the present invention provides a photo-alignment method for a display substrate, where the display substrate includes a display area and an optical module installation area, the display area at least partially surrounds the optical module installation area, and the photo-alignment method includes:
providing a substrate base plate;
coating alignment liquid on one side of the substrate base plate; the alignment liquid covers the display area and the optical module setting area;
irradiating the alignment liquid in the display area by adopting light with a first energy density, and irradiating the alignment liquid in the optical module setting area by adopting light with a second energy density to form an alignment film, wherein the first energy density is not equal to the second energy density;
wherein the part of the alignment film in the display region is a first sub-alignment film, the part of the alignment film in the optical module setting region is a second sub-alignment film, and the chromaticity of the first sub-alignment film is (X)1，Y1) The chromaticity of the second sub-alignment film is (X)2，Y2)，X1＞X2，Y1＞Y2。
In a second aspect, an embodiment of the present invention provides a display substrate, where the display substrate includes a display area and an optical module installation area, the display area at least partially surrounds the optical module installation area, the display substrate further includes a substrate and an alignment film located on one side of the substrate, where a portion of the alignment film located in the display area is a first sub-alignment film, a portion of the alignment film located in the optical module installation area is a second sub-alignment film, and a chromaticity of the first sub-alignment film is (X)1，Y1) The chromaticity of the second sub-alignment film is (X)2，Y2)，X1＞X2，Y1＞Y2。
In a third aspect, an embodiment of the present invention provides a liquid crystal display panel, including an array substrate and a color film substrate that are arranged oppositely;
wherein the array substrate comprises the display substrate of the second aspect; and/or the color film substrate comprises the display substrate of the second aspect.
In the photo-alignment method of a display substrate provided by the embodiment of the invention, the alignment liquid in the display region is irradiated by the light with the first energy density to form the first sub-alignment film, the alignment liquid in the optical module setting region is irradiated by the light with the second energy density to form the second sub-alignment film, the chromaticity of the first sub-alignment film along the X-axis is greater than that of the second sub-alignment film along the Y-axis, the chromaticity of the first sub-alignment film along the Y-axis is greater than that of the second sub-alignment film along the Y-axis, therefore, the difference value of the chromaticity of the optical module setting area and the chromaticity of the display area in the prior art can be compensated (in the prior art, the X-axis chromaticity of the light emitted by the optical module setting area is greater than the X-axis chromaticity of the light emitted by the display area, and the Y-axis chromaticity of the light emitted by the optical module setting area is greater than the Y-axis chromaticity of the light emitted by the display area) so as to realize the consistency of the chromaticity of the optical module setting area and the chromaticity of the display area.
Drawings
Fig. 1 is a schematic top view of a display substrate according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view along the direction AA' in FIG. 1;
FIG. 3 is a flowchart illustrating a method for photoalignment of a display substrate according to an embodiment of the present invention;
FIGS. 4 a-4 c are schematic diagrams illustrating the optical alignment of a display substrate according to an embodiment of the present invention;
FIGS. 5 a-5 c are schematic diagrams of alignment liquid irradiated by light with different energy densities;
FIG. 6 is an X-chromaticity distribution diagram of a film formed by irradiating alignment liquid with light of different energy densities;
FIG. 7 is a Y chromaticity distribution diagram of a film formed by irradiating alignment liquid with light of different energy densities;
FIGS. 8 a-8 e are schematic diagrams illustrating optical alignment of another display substrate according to embodiments of the present invention;
FIGS. 9 a-9 e are schematic diagrams illustrating optical alignment of another display substrate according to embodiments of the present invention;
fig. 10 is a schematic cross-sectional view illustrating an lcd panel according to an embodiment of the present invention;
FIG. 11 is a schematic cross-sectional view illustrating another LCD panel according to an embodiment of the present invention;
fig. 12 is a schematic cross-sectional view of another lcd panel according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Table 1 table showing distribution of transmittance and chromaticity of an optical module installation area of a liquid crystal display panel according to an embodiment of the present invention
Numbering Light transmittance ΔWx ΔWy
1 82.6％ 0.008 0.014
2 82.6％ 0.008 0.014
3 82.8％ 0.008 0.014
4 82.6％ 0.008 0.014
5 82.7％ 0.009 0.015
Table 1 is a table of distribution of transmittance and chromaticity of an optical module setting area of a liquid crystal display panel according to an embodiment of the present invention, in which the liquid crystal display panel includes a display area and an optical module setting area, and the optical module setting area may be used to place an optical function module. The alignment films of the liquid crystal display panel are completely the same in the display area and the optical module arrangement area. The light emitted from the display area is white light, and the results of the transmittance and chromaticity tests of the 5 sets of optical module setting areas are shown in table 1 under the same light source condition as that of the illumination display area. The light transmittance of the optical module setting area is 82.6% -82.8%, and the light transmittance is high. Δ WxThe difference between the X-axis chromaticity and the white light chromaticity of the optical module setting area. Δ WyThe difference between the Y-axis chromaticity and the white light chromaticity of the optical module setting area. The chromaticity of white light was (0.333 ). Color is commonly represented by lightness and chroma, which are properties of a color excluding lightness that reflects the hue and saturation of the color. It can be seen that both the X-axis chromaticity and the Y-axis chromaticity of the light emitted through the optical module installation area are greater than the X-axis chromaticity and the Y-axis chromaticity corresponding to the white light chromaticity, i.e., the pass through areaThe X-axis chromaticity of the light emitted from the optical module setting area is greater than the X-axis chromaticity of the light emitted from the display area, and the Y-axis chromaticity of the light emitted from the optical module setting area is greater than the Y-axis chromaticity of the light emitted from the display area. The chromaticity of the optical module installation area is inconsistent with that of the display area, and the problem needs to be solved urgently.
Fig. 1 is a schematic top view of a display substrate according to an embodiment of the present invention, and fig. 2 is a schematic cross-sectional view along the direction AA' in fig. 1. referring to fig. 1 and fig. 2, the display substrate includes a display area 110 and an optical module disposing area 120, the display area 110 at least partially surrounds the optical module disposing area 120, the display area 110 may be used for displaying an image, the display area 110 may include a plurality of pixels arranged in an array, and each pixel may include a plurality of sub-pixels. The optical module installation area 120 is an area where no image is displayed.
Fig. 3 is a flowchart of a photo-alignment method for a display substrate according to an embodiment of the present invention, and fig. 4a to 4c are schematic views of a photo-alignment method for a display substrate according to an embodiment of the present invention, and referring to fig. 1, fig. 2, fig. 3, and fig. 4a to 4c, the photo-alignment method for a display substrate includes the following steps:
s110, a substrate 10 is provided.
S120, coating an alignment liquid 200 on one side of the substrate 10, wherein the alignment liquid 200 covers the display region 110 and the optical module disposing region 120.
S130, irradiating the alignment liquid 200 of the display region 110 with light of a first energy density, and irradiating the alignment liquid 200 of the optical module disposing region 120 with light of a second energy density, wherein the first energy density is different from the second energy density, to form the alignment film 20.
Wherein the portion of the alignment film 20 in the display region 110 is a first sub-alignment film 21, the portion of the alignment film 20 in the optical module disposing region 120 is a second sub-alignment film 22, and the chromaticity of the first sub-alignment film 21 is (X)1，Y1) The chromaticity of the second sub-alignment film 22 is (X)2，Y2)，X1＞X2，Y1＞Y2。
In the photo-alignment method of a display substrate provided by the embodiment of the invention, the alignment liquid in the display region is irradiated by the light with the first energy density to form the first sub-alignment film, the alignment liquid in the optical module setting region is irradiated by the light with the second energy density to form the second sub-alignment film, the chromaticity of the first sub-alignment film along the X-axis is greater than that of the second sub-alignment film along the Y-axis, the chromaticity of the first sub-alignment film along the Y-axis is greater than that of the second sub-alignment film along the Y-axis, therefore, the difference value of the chromaticity of the optical module setting area and the chromaticity of the display area in the prior art can be compensated (in the prior art, the X-axis chromaticity of the light emitted by the optical module setting area is greater than the X-axis chromaticity of the light emitted by the display area, and the Y-axis chromaticity of the light emitted by the optical module setting area is greater than the Y-axis chromaticity of the light emitted by the display area) so as to realize the consistency of the chromaticity of the optical module setting area and the chromaticity of the display area.
Fig. 5 a-5 c are schematic diagrams of irradiating the alignment liquid with light of different energy densities, and referring to fig. 2, 4 and 5 a-5 c, the steps of irradiating the alignment liquid 200 in the display region 110 with light of a first energy density and irradiating the alignment liquid 200 in the optical module setting region 120 with light of a second energy density include the following sub-steps:
s131, providing a first mask 310, wherein the first mask 310 includes a first light-transmitting region 311, and the first light-transmitting region 311 exposes the display region 110.
S132, the alignment liquid 200 is irradiated with light of the first energy density through the first mask 310.
When the alignment liquid 200 is irradiated by the light with the first energy density through the first mask 310, the light with the first energy density is shielded by the opaque region of the first mask 310 and cannot be irradiated to the alignment liquid 200 in the optical module setting region 120, and the light with the first energy density is transmitted through the first transparent region 311 of the first mask 310 and can be irradiated to the alignment liquid 200 in the display region 110, so that the alignment liquid 200 in the display region 110 is cured to form the first sub-alignment film 21.
S133, providing a second mask 320, wherein the second mask 320 includes a second light-transmitting region 321, and the second light-transmitting region 321 exposes the optical module disposing region 120.
S134, irradiating the alignment liquid 200 through the second mask 320 by using light with the second energy density.
When the alignment liquid 200 is irradiated with the light with the second energy density through the second mask 320, the light with the second energy density is shielded by the opaque region of the second mask 320 and cannot be irradiated to the first sub-alignment film 21. The light with the second energy density can irradiate the alignment liquid 200 in the optical module disposing region 120 through the second light transmitting region 321 of the second mask 320, so that the alignment liquid 200 in the optical module disposing region 120 is cured to form the second sub-alignment film 22.
Fig. 6 is a diagram showing X chromaticity distribution of a film layer formed after the alignment liquid is irradiated with light of different energy densities, fig. 7 is a diagram showing Y chromaticity distribution of a film layer formed after the alignment liquid is irradiated with light of different energy densities, and referring to fig. 6 and 7, chromaticity (X, Y) of the alignment film 20 formed by irradiating the alignment liquid 200 is shown, where X is an ordinate in fig. 6 and represents the magnitude of X-axis chromaticity; y is an ordinate in fig. 7, and represents the magnitude of Y-axis chromaticity. Both X and Y normally vary with the energy density of the light irradiated to the alignment liquid 200, and both X and Y are maximum values when the energy density of the light irradiated to the alignment liquid 200 is the set energy density. Since X and Y are both normally changed according to the energy density of the light irradiating the alignment liquid 200, the chromaticities (including X-axis chromaticity and Y-axis chromaticity) of the two energy densities equal to the set energy density difference are the same when the light irradiating the formation film layer. In order to realize that the X-axis chromaticity of the first sub-alignment film 21 is greater than the X-axis chromaticity of the second sub-alignment film 22 and the Y-axis chromaticity of the first sub-alignment film 21 is greater than the Y-axis chromaticity of the second sub-alignment film 22, a difference between the first energy density and the set energy density may be set smaller than a difference between the second energy density and the set energy density.
Alternatively, the energy density is set to 3000mj/cm2. The alignment liquid 200 in the embodiment of the invention can adopt PI liquid, and the energy density of the PI liquid is 3000mj/cm2The X-axis chromaticity and the Y-axis chromaticity of the film layer formed by the light irradiation of (1) have maximum values.
Illustratively, the first energy density may be 3000mj/cm2Setting the energy density to 3000mj/cm2The difference between the first energy density and the set energy density is 0. The second energy density may be 4000mj/cm2The difference between the second energy density and the set energy density is 1000mj/cm2. The difference between the first energy density and the set energy density is smaller than the difference between the second energy density and the set energy density, thereby realizing that the X-axis chromaticity of the first sub-alignment film 21 is greater than the X-axis chromaticity of the second sub-alignment film 22, and the Y-axis chromaticity of the first sub-alignment film 21 is greater than the Y-axis chromaticity of the second sub-alignment film 22.
Fig. 8a to 8e are schematic diagrams illustrating photo-alignment of another display substrate according to an embodiment of the present invention, and referring to fig. 2, fig. 4a to 4c, fig. 5a to 5c, and fig. 8a to 8e, before coating the alignment liquid 200 on one side of the substrate 10, the method for photo-alignment of the display substrate further includes: forming a buffer layer 41, a gate insulating layer 42, and an interlayer insulating layer 43 in this order on the base substrate 10; the gate insulating layer 42 and the interlayer insulating layer 43 in the optical module disposition region 120 are removed.
Illustratively, the photoalignment method of a display substrate may include the steps of:
s210, forming a buffer layer 41 on one side of the substrate 10, wherein the buffer layer 41 covers the display region 110 and the optical module installation region 120.
And S220, forming a gate insulating layer 42 on the side, away from the substrate base plate 10, of the buffer layer 41, wherein the gate insulating layer 42 covers the display area 110 and the optical module arrangement area 120.
And S230, forming an interlayer insulating layer 43 on the side, away from the substrate base plate 10, of the gate insulating layer 42, wherein the interlayer insulating layer 43 covers the display area 110 and the optical module arrangement area 120.
S240, the gate insulating layer 42 and the interlayer insulating layer 43 in the optical module disposing region 120 are removed.
By removing the gate insulating layer 42 and the interlayer insulating layer 43 in the optical module disposition region 120, the light transmittance of the optical module disposition region 120 can be improved.
S250, forming the alignment film 20 on the side of the interlayer insulating layer 43 away from the base substrate 10.
The process of forming the alignment film 20 may be realized, for example, using the above-described step S110, step S120, and step S130. In the embodiment of the invention, the display substrate is an array substrate, and the alignment film 20 is an alignment film on the array substrate.
Fig. 9a to 9e are schematic diagrams illustrating photo-alignment of another display substrate according to an embodiment of the present invention, and referring to fig. 2, fig. 4a to 4c, fig. 5a to 5c, and fig. 9a to 9e, before coating the alignment liquid 200 on one side of the substrate 10, the method for photo-alignment of the display substrate further includes: sequentially forming a black matrix layer 51, a color resist layer 52 and a planarization layer 53 on the base substrate 10; the black matrix layer 51 and the color resist layer 52 in the optical module providing region 120 are removed.
Illustratively, the photoalignment method of a display substrate may include the steps of:
s310, forming a black matrix layer 51 on one side of the base substrate 10, wherein the black matrix layer 51 covers the display region 110 and the optical module installation region 120.
And S320, forming a color resistance layer 52 between the adjacent black matrix layers 51, wherein the color resistance layer 52 covers the display area 110 and the optical module arrangement area 120.
S330, removing the black matrix layer 51 and the color resistance layer 52 in the optical module setting area 120.
The black matrix layer 51 and the color resist layer 52 in the optical module setting area 120 are removed to prevent the black matrix layer 51 and the color resist layer 52 from affecting the light passing through the optical module setting area 120, thereby ensuring the normal operation of the optical function module in the optical module setting area 120.
S340, forming a planarization layer 53 covering the black matrix layer 51, the color resist layer 52 and the substrate 10 on the side of the color resist layer 52 away from the substrate 10, wherein the planarization layer 53 covers the display region 110 and the optical module installation region 120.
And S350, forming the alignment film 20 on the side, away from the substrate 10, of the planarization layer 53.
The process of forming the alignment film 20 may be realized, for example, using the above-described step S110, step S120, and step S130. In the embodiment of the present invention, the display substrate is a color film substrate, and the alignment film 20 is an alignment film on the color film substrate.
The embodiment of the invention also provides a display substrate, and the display substrate can be formed by the photo-alignment method of the display substrate provided by the embodiment of the invention. Referring to fig. 1 and 2, the display substrate includes a display area 110 and an optical module installation area 120, and the display area 110 at least partially surrounds the optical module installation area 120. The display substrate further comprises a substrate 10 toAnd an alignment film 20 on one side of the base substrate 10. Wherein the portion of the alignment film 20 in the display region 110 is a first sub-alignment film 21, the portion of the alignment film 20 in the optical module disposing region 120 is a second sub-alignment film 22, and the chromaticity of the first sub-alignment film 21 is (X)1，Y1) The chromaticity of the second sub-alignment film 22 is (X)2，Y2)，X1＞X2，Y1＞Y2。
In the display substrate provided in the embodiment of the present invention, the chromaticity of the first sub-alignment film in the X-axis direction is greater than the chromaticity of the second sub-alignment film in the X-axis direction, and the chromaticity of the first sub-alignment film in the Y-axis direction is greater than the chromaticity of the second sub-alignment film in the Y-axis direction, so that a difference between the chromaticities of the optical module setting region and the display region in the prior art can be compensated, and the chromaticities of the optical module setting region and the display region are consistent.
Alternatively, referring to fig. 2, the alignment film 20 includes a high molecular polymer material, and the chain length of the high molecular polymer in the first sub-alignment film 21 is not equal to the chain length of the high molecular polymer in the second sub-alignment film 22. For example, the longer the chain length of the polymer, the higher the cyclization degree of the polymer, and the shorter the chain length of the polymer, the lower the cyclization degree of the polymer. The cyclization degree of the high molecular polymer in the film layers formed by light irradiation with different energy densities is different. The higher the energy density of light, the more the cyclization degree of the high molecular weight polymer is; the smaller the energy density of light, the lower the degree of cyclization of the polymer.
Alternatively, the high molecular polymer is (C)14N2O5H10)NAnd N is a positive integer. The polymer having repeating unit C14N2O5H10The repeating arrangement is performed such that the longer the chain length of the polymer, the larger the number of repeating units N, and the shorter the chain length of the polymer, the smaller the number of repeating units N.
Further, the chemical formula of the repeating unit of the high molecular polymer is:
Figure GDA0003103134740000111
alternatively, referring to fig. 2 and 8e, a buffer layer 41 is further disposed between the second sub-alignment film 22 of the optical module disposition region 120 and the base substrate 10. A buffer layer 41, a gate insulating layer 42, and an interlayer insulating layer 43 are further sequentially disposed between the first sub-alignment film 21 of the display region 110 and the substrate 10 in a direction away from the substrate 10. In the embodiment of the invention, the display substrate is an array substrate, and the alignment film 20 is an alignment film on the array substrate.
Alternatively, referring to fig. 2 and 9e, a planarization layer 53 is further disposed between the second sub-alignment film 22 of the optical module disposing region 120 and the substrate 10, and a black matrix layer 51, a color resist layer 52, and a planarization layer 53 are further disposed between the first sub-alignment film 21 of the display region 110 and the substrate 10 in sequence along a direction away from the substrate 10. In the embodiment of the present invention, the display substrate is a color film substrate, and the alignment film 20 is an alignment film on the color film substrate.
Fig. 10 is a schematic cross-sectional structure view of a liquid crystal display panel according to an embodiment of the present invention, and referring to fig. 10, the liquid crystal display panel includes an array substrate 60 and a color filter substrate 70 that are oppositely disposed. The liquid crystal display panel may further include a liquid crystal layer 80 located between the array substrate 60 and the color film substrate 70, where the liquid crystal layer 80 includes a plurality of liquid crystal molecules. The array substrate 60 may employ a display substrate as shown in fig. 2 and 8 e. Since the array substrate 60 and the color filter substrate 70 may include alignment films, for clarity, the alignment film in the array substrate 60 is referred to as an array substrate alignment film 620, and the alignment film in the color filter substrate 70 is referred to as a color filter substrate alignment film 720. The portion of the alignment film 620 in the display region 110 is a third sub-alignment film 621, the portion of the alignment film 620 in the optical module disposing region 120 is a fourth sub-alignment film 622, and the chromaticity of the third sub-alignment film 621 is (X)3，Y3) The chromaticity of the fourth sub-alignment film 622 is (X)4，Y4)，X3＞X4，Y3＞Y4. The chromaticity of the color film substrate alignment film 720 in the display area 110 is the same as that in the optical module installation area 120. In the liquid crystal display panel provided by the embodiment of the invention, the X-axis chroma of the third sub-alignment film is greater than that of the fourth sub-alignment filmThe X-axis chromaticity of the sub-alignment films and the Y-axis chromaticity of the third sub-alignment film are larger than the Y-axis chromaticity of the fourth sub-alignment film, so that the difference value of the chromaticities of the optical module setting area and the display area in the prior art can be compensated, and the chromaticities of the optical module setting area and the display area are consistent.
Fig. 11 is a schematic cross-sectional structure view of another liquid crystal display panel according to an embodiment of the present invention, and referring to fig. 11, the liquid crystal display panel includes an array substrate 60 and a color filter substrate 70 that are oppositely disposed. The liquid crystal display panel may further include a liquid crystal layer 80 located between the array substrate 60 and the color film substrate 70, where the liquid crystal layer 80 includes a plurality of liquid crystal molecules. The color filter substrate 70 may be a display substrate as shown in fig. 2 and 9 e. Since the array substrate 60 and the color filter substrate 70 may include alignment films, for clarity, the alignment film in the array substrate 60 is referred to as an array substrate alignment film 620, and the alignment film in the color filter substrate 70 is referred to as a color filter substrate alignment film 720. The chromaticity of the alignment film 620 of the array substrate is the same in the display region 110 and the optical module disposing region 120. The portion of the color film substrate alignment film 720 in the display region 110 is a fifth sub-alignment film 721, the portion of the color film substrate alignment film 720 in the optical module setting region 120 is a sixth sub-alignment film 722, and the chromaticity of the fifth sub-alignment film 721 is (X)5，Y5) The chromaticity of the sixth sub-alignment film 722 is (X)6，Y6)，X5＞X6，Y5＞Y6. In the liquid crystal display panel provided in the embodiment of the present invention, the X-axis chromaticity of the fifth sub-alignment film is greater than the X-axis chromaticity of the sixth sub-alignment film, and the Y-axis chromaticity of the fifth sub-alignment film is greater than the Y-axis chromaticity of the sixth sub-alignment film, so that a difference between chromaticities of the optical module setting area and the display area in the prior art can be compensated, and the chromaticities of the optical module setting area and the display area are consistent.
Fig. 12 is a schematic cross-sectional structure view of another liquid crystal display panel according to an embodiment of the present invention, and referring to fig. 12, the liquid crystal display panel includes an array substrate 60 and a color filter substrate 70 that are oppositely disposed. The liquid crystal display panel may further include a liquid crystal layer 80 located between the array substrate 60 and the color film substrate 70, where the liquid crystal layer 80 includes a plurality of liquid crystal molecules. The array substrate 60 can be as shown in fig. 2 andas the display substrate shown in fig. 8e, the color filter substrate 70 may be the display substrate shown in fig. 2 and 9 e. Since the array substrate 60 and the color filter substrate 70 may include alignment films, for clarity, the alignment film in the array substrate 60 is referred to as an array substrate alignment film 620, and the alignment film in the color filter substrate 70 is referred to as a color filter substrate alignment film 720. The portion of the alignment film 620 in the display region 110 is a third sub-alignment film 621, the portion of the alignment film 620 in the optical module disposing region 120 is a fourth sub-alignment film 622, and the chromaticity of the third sub-alignment film 621 is (X)3，Y3) The chromaticity of the fourth sub-alignment film 622 is (X)4，Y4)，X3＞X4，Y3＞Y4. The portion of the color film substrate alignment film 720 in the display region 110 is a fifth sub-alignment film 721, the portion of the color film substrate alignment film 720 in the optical module setting region 120 is a sixth sub-alignment film 722, and the chromaticity of the fifth sub-alignment film 721 is (X)5，Y5) The chromaticity of the sixth sub-alignment film 722 is (X)6，Y6)，X5＞X6，Y5＞Y6. In the liquid crystal display panel provided in the embodiment of the present invention, the chromaticity of the third sub-alignment film in the X-axis direction is greater than the chromaticity of the fourth sub-alignment film in the X-axis direction, the chromaticity of the third sub-alignment film in the Y-axis direction is greater than the chromaticity of the fourth sub-alignment film in the Y-axis direction, the chromaticity of the fifth sub-alignment film in the X-axis direction is greater than the chromaticity of the sixth sub-alignment film in the X-axis direction, and the chromaticity of the fifth sub-alignment film in the Y-axis direction is greater than the chromaticity of the sixth sub-alignment film in the Y-axis direction, so that a difference between the chromaticities of the optical module setting region and the display region in the prior art can be compensated, and the chromaticities of the optical module setting region and the display region are consistent.
Alternatively, referring to fig. 12, the chromaticity of the third sub-alignment film 621 is equal to the chromaticity of the fifth sub-alignment film 721, i.e., the X-axis chromaticity of the third sub-alignment film 621 is equal to the X-axis chromaticity, X, of the fifth sub-alignment film 7213＝X5The Y-axis chromaticity of the third sub-alignment film 621 is equal to the Y-axis chromaticity of the fifth sub-alignment film 721, Y3＝Y5. The chromaticity of the fourth sub-alignment film 622 is equal to the chromaticity of the sixth sub-alignment film 722, i.e., the X-axis chromaticity of the fourth sub-alignment film 622 is equal to the X-axis chromaticity, X, of the sixth sub-alignment film 7224＝X6The Y-axis chromaticity of the fourth sub-alignment film 622 is equal to the Y-axis chromaticity of the sixth sub-alignment film 722, Y4＝Y6. If the chromaticity of the third sub-alignment film 621 is not equal to that of the fifth sub-alignment film 721, the chromaticity of light passing through the third sub-alignment film 621 and the fifth sub-alignment film 721 is neither the chromaticity of the third sub-alignment film 621 nor the chromaticity of the fifth sub-alignment film 721. If the chromaticity of the third sub-alignment film 621 is equal to the chromaticity of the fifth sub-alignment film 721, the chromaticity of light passing through the third and fifth sub-alignment films 621 and 721 is the chromaticity of the third sub-alignment film 621 or the chromaticity of the fifth sub-alignment film 721. If the chromaticity of the fourth sub-alignment film 622 is not equal to the chromaticity of the sixth sub-alignment film 722, the chromaticity of light passing through the fourth sub-alignment film 622 and the sixth sub-alignment film 722 is neither the chromaticity of the fourth sub-alignment film 622 nor the chromaticity of the sixth sub-alignment film 722. If the chromaticity of the fourth sub-alignment film 622 is equal to the chromaticity of the sixth sub-alignment film 722, the chromaticity of light passing through the fourth sub-alignment film 622 and the sixth sub-alignment film 722 is the chromaticity of the fourth sub-alignment film 622 or the chromaticity of the sixth sub-alignment film 722. It can be seen that when the chromaticity of the light of the sixth sub-alignment film 722 and the chromaticity of the fourth sub-alignment film 622 are set to be equal to the chromaticity of the sixth sub-alignment film 722, the compensation for the difference between the chromaticities of the optical module setting region and the display region in the prior art is easily achieved.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims (12)

1. A photo-alignment method of a display substrate, the display substrate comprising a display area and an optical module installation area, the display area at least partially surrounding the optical module installation area, the optical module installation area being an area where no image is displayed, the photo-alignment method comprising:
providing a substrate base plate;
coating alignment liquid on one side of the substrate base plate; the alignment liquid covers the display area and the optical module setting area;
irradiating the alignment liquid in the display area by adopting light with a first energy density, and irradiating the alignment liquid in the optical module setting area by adopting light with a second energy density to form an alignment film, wherein the first energy density is not equal to the second energy density;
wherein the part of the alignment film in the display region is a first sub-alignment film, the part of the alignment film in the optical module setting region is a second sub-alignment film, and the chromaticity of the first sub-alignment film is (X)1，Y1) The chromaticity of the second sub-alignment film is (X)2，Y2)，X1＞X2，Y1＞Y2。
2. The method of claim 1, wherein the illuminating the alignment liquid in the display region with a first energy density light and the illuminating the alignment liquid in the optical module disposing region with a second energy density light comprises:
providing a first mask, wherein the first mask comprises a first light-transmitting area, and the first light-transmitting area is exposed out of the display area;
irradiating the alignment liquid through the first mask by adopting light with first energy density;
providing a second mask, wherein the second mask comprises a second light-transmitting area, and the second light-transmitting area is exposed out of the optical module setting area;
and irradiating the alignment liquid through the second mask by adopting light with a second energy density.
3. The photoalignment method according to claim 1, wherein the chromaticity (X, Y) of the alignment film formed by irradiating the alignment solution is normally varied with energy density of light irradiating the alignment solution; when the energy density of light irradiating the alignment liquid is set, X and Y are maximum values;
the difference between the first energy density and the set energy density is less than the difference between the second energy density and the set energy density.
4. The photoalignment method according to claim 3, wherein the set energy density is 3000mj/cm2。
5. The photo-alignment method according to claim 1, further comprising, before applying the alignment liquid to one side of the substrate base plate:
sequentially forming a buffer layer, a gate insulating layer and an interlayer insulating layer on the substrate;
and removing the gate insulating layer and the interlayer insulating layer in the optical module setting area.
6. The photo-alignment method according to claim 1, further comprising, before applying the alignment liquid to one side of the substrate base plate:
sequentially forming a black matrix layer, a color resistance layer and a planarization layer on the substrate base plate;
and removing the black matrix layer and the color resistance layer in the optical module setting area.
7. The display substrate is characterized by comprising a display area and an optical module setting area, wherein the display area at least partially surrounds the optical module setting area, the optical module setting area is an area without image display, the display substrate further comprises a substrate base plate and an alignment film positioned on one side of the substrate base plate, the portion, positioned in the display area, of the alignment film is a first sub-alignment film, and the alignment film is positioned in the optical module setting areaPart of the region is a second sub-alignment film, and the chromaticity of the first sub-alignment film is (X)1，Y1) The chromaticity of the second sub-alignment film is (X)2，Y2)，X1＞X2，Y1＞Y2。
8. The display substrate of claim 7, wherein the alignment film comprises a polymer material, and the chain length of the polymer in the first sub-alignment film is not equal to the chain length of the polymer in the second sub-alignment film.
9. The display substrate according to claim 8, wherein the high molecular polymer is (C)14N2O5H10)NAnd N is a positive integer.
10. The display substrate according to claim 7, wherein a buffer layer is further disposed between the second sub-alignment film of the optical module disposing region and the substrate; and a buffer layer, a gate insulating layer and an interlayer insulating layer are sequentially arranged between the first sub-alignment film and the substrate base plate in the display area along the direction deviating from the substrate base plate.
11. The display substrate according to claim 7, wherein a planarization layer is further disposed between the second sub-alignment film of the optical module disposing region and the substrate; and a black matrix layer, a color resistance layer and a planarization layer are sequentially arranged between the first sub-alignment film and the substrate base plate of the display area along the direction departing from the substrate base plate.
12. The liquid crystal display panel is characterized by comprising an array substrate and a color film substrate which are oppositely arranged;
wherein the array substrate comprises the display substrate of any one of claims 7-10; and/or the color film substrate comprises the display substrate of any one of claims 7-9 and 11.
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CN106353924A (en) * 2016-11-30 2017-01-25 厦门天马微电子有限公司 Display panel manufacturing method and display panel
CN108398824A (en) * 2018-03-01 2018-08-14 厦门天马微电子有限公司 Display device

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CN106353924A (en) * 2016-11-30 2017-01-25 厦门天马微电子有限公司 Display panel manufacturing method and display panel
CN108398824A (en) * 2018-03-01 2018-08-14 厦门天马微电子有限公司 Display device

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