CN107728385B - Liquid crystal panel and optical alignment method thereof - Google Patents

Liquid crystal panel and optical alignment method thereof Download PDF

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Publication number
CN107728385B
CN107728385B CN201710934626.3A CN201710934626A CN107728385B CN 107728385 B CN107728385 B CN 107728385B CN 201710934626 A CN201710934626 A CN 201710934626A CN 107728385 B CN107728385 B CN 107728385B
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sub
pixel
photomask
pixels
substrate
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CN107728385A (en
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李淑君
陈钢
吴祥
林祥
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Nanjing CEC Panda LCD Technology Co Ltd
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Nanjing CEC Panda LCD Technology Co Ltd
Nanjing CEC Panda FPD Technology 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

Abstract

The invention discloses a liquid crystal panel and a photo-alignment method thereof, wherein the direction of arranging sub-pixels with different colors on the liquid crystal panel is defined as a row direction, and the direction vertical to the row direction is defined as a column direction, and the photo-alignment method comprises the following steps: taking the length of one sub-pixel row direction as the period of the first substrate side photomask, carrying out alignment in the row direction on the sub-pixel regions, wherein the alignment directions of two adjacent sub-pixels are opposite; using 1/4 of the length of one sub-pixel in the row direction as the period of the second substrate side photomask, dividing the sub-pixels into four sub-regions from top to bottom along the row direction, and performing alignment in the row direction, wherein the alignment directions of two adjacent sub-regions are opposite. The invention can reduce dark stripes in the pixel area and improve the transmittance of the display panel. When the first substrate and the second substrate are formed into a box, if box deviation occurs, the problem of color deviation cannot occur.

Description

Liquid crystal panel and optical alignment method thereof
Technical Field
The invention relates to the technical field of liquid crystal display, in particular to a liquid crystal panel and a photo-alignment method thereof.
Background
The optical alignment of the liquid crystal panel utilizes ultraviolet irradiation to control the alignment of liquid crystal molecules, thereby avoiding the surface pollution of a glass substrate or the scratch to an alignment film possibly caused in the process of rubbing alignment and simultaneously realizing multi-domain alignment through a photomask. UV (ultraviolet) light2The A (ultra Violet Vertical alignment) technique is one of the photo-alignment techniques, by UV2The A technology is easy to realize 4-domain alignment of the panel and enhance the visual angle expression of the panel.
FIG. 1 shows a conventional UV2A is a schematic flow chart of optical alignment. Definition ofThe sub-pixel arrangement direction along different colors is a row direction, the direction vertical to the row direction is a column direction, the length of one sub-pixel in the row direction is a, the length of one sub-pixel in the column direction is b, and the alignment steps are as follows:
the first step is as follows: the sub-pixels are divided into left and right regions along the row direction with half of the length of the sub-pixels in the row direction being 0.5a of the period of the array substrate side mask, and the alignment in the column direction is performed, the left and right regions being opposite in the alignment direction
The second step is that: half of the length of one sub-pixel in the row direction is used as the period (namely 0.5b) of the color film substrate side photomask, the sub-pixels are divided into an upper area and a lower area along the row direction, and the alignment direction of the sub-pixels is opposite to that of the upper area and the lower area.
After the exposure is completed, four domains are formed in the upper left, lower left, upper right and lower right regions of one sub-pixel, and the tilt angles of the liquid crystal molecules in the four domains are shown by arrows in fig. 1.
Under the dual actions of the UV photo-alignment and the ITO fringe electric field on the two sides of the array substrate and the color film substrate, as shown in fig. 2, swastika dark stripes or swastika dark stripes appear in the sub-pixels in a white state, which are collectively called as ten-thousand dark stripes, and the positions of the dark stripes are cross-shaped in the middle and account for half of the edges at the periphery. The opening ratio of the pixel area is seriously affected by the dark stripes in Chinese character Wan, and particularly, as the number of pixels per inch of the panel is increased, the transmittance becomes a bottleneck of the photoalignment technology.
When the array substrate and the color filter substrate are subjected to binning, binning shift can cause the size of four domains in one sub-pixel region to be uneven, thereby causing color shift. As shown in FIG. 3, when the box shift and the ten-thousand shading shift to the right, the left two-domain area of each sub-pixel increases and the right two-domain area decreases.
Disclosure of Invention
The invention aims to provide a liquid crystal panel and a photo-alignment method thereof, which can improve the transmittance of the liquid crystal panel and improve the color cast.
The liquid crystal panel includes: the liquid crystal display panel comprises a first substrate, a second substrate and a liquid crystal, wherein the first substrate and the second substrate are opposite, the liquid crystal is positioned between the first substrate and the second substrate, the first substrate and the second substrate are respectively provided with a plurality of sub-pixels which are oppositely arranged, the arrangement direction of the sub-pixels with different colors is defined as a row direction, the direction vertical to the row direction is defined as a column direction, the sub-pixels comprise odd sub-pixels arranged along the row direction and even sub-pixels arranged along the row direction, and the sub-pixels are uniformly divided into a first sub-area, a second sub-area, a third sub-area and a fourth sub-area along the column direction.
According to an exemplary aspect of an embodiment, the optical alignment method disclosed in the present invention includes the steps of:
the first step is as follows: taking the length of a sub-pixel row direction as the period of a photomask on the first substrate side, covering odd sub-pixels arranged along the row direction by a light leakage gap of the photomask, and carrying out alignment in a first direction; taking the length of a sub-pixel row direction as the period of a photomask on the first substrate side, covering even sub-pixels arranged along the row direction by a light leakage gap of the photomask, and carrying out alignment in a second direction, wherein the first direction and the second direction are both parallel to the row direction, and the first direction and the second direction are parallel and opposite;
the second step is that: using 1/4 with a length of one sub-pixel row direction as the period of the second substrate side photomask, covering the first subregion and the third subregion by the light leakage gap of the photomask, and performing alignment in the third direction; the period of the second substrate side photomask is 1/4 with the length of one sub-pixel column direction, the light leakage gap of the photomask covers the second subregion and the fourth subregion, and the illumination is carried out along the fourth direction, wherein the third direction and the fourth direction are both parallel to the row direction, and the third direction and the fourth direction are both parallel and opposite to each other.
According to another exemplary aspect of the embodiments, the photo-alignment method disclosed in the present invention includes the steps of:
the first step is as follows: taking the length of a sub-pixel row direction as the period of a photomask on the first substrate side, covering even sub-pixels arranged along the row direction by a light leakage gap of the photomask, and carrying out alignment in a first direction; taking the length of a sub-pixel row direction as the period of a photomask on the first substrate side, covering odd sub-pixels arranged along the row direction by a light leakage gap of the photomask, and carrying out alignment in a second direction, wherein the first direction and the second direction are both parallel to the row direction, and the first direction and the second direction are parallel and opposite;
the second step is that: using 1/4 with a length of one sub-pixel row direction as the period of the second substrate side photomask, covering the first subregion and the third subregion by the light leakage gap of the photomask, and performing alignment in the third direction; the period of the second substrate side photomask is 1/4 with the length of one sub-pixel column direction, the light leakage gap of the photomask covers the second subregion and the fourth subregion, and the illumination is carried out along the fourth direction, wherein the third direction and the fourth direction are both parallel to the row direction, and the third direction and the fourth direction are both parallel and opposite to each other.
According to another exemplary aspect of the embodiments, the photo-alignment method disclosed in the present invention includes the steps of:
the first step is as follows: taking the length of a sub-pixel row direction as the period of a photomask on the first substrate side, covering odd sub-pixels arranged along the row direction by a light leakage gap of the photomask, and carrying out alignment in a first direction; taking the length of a sub-pixel row direction as the period of a photomask on the first substrate side, covering even sub-pixels arranged along the row direction by a light leakage gap of the photomask, and carrying out alignment in a second direction, wherein the first direction and the second direction are both parallel to the row direction, and the first direction and the second direction are parallel and opposite;
the second step is that: 1/4 with the length of one sub-pixel row direction is taken as the period of a second substrate side photomask, and the light leakage gap of the photomask covers the second subregion and the fourth subregion to carry out alignment in the third direction; using 1/4 with a length of one sub-pixel column direction as the period of the second substrate side light shield, the light leakage gap of the light shield covers the first sub-region and the third sub-region, and the illumination is performed along the fourth direction, wherein the third direction and the fourth direction are both parallel to the row direction, and the third direction is parallel to and opposite to the fourth direction.
According to another exemplary aspect of the embodiments, the photo-alignment method disclosed in the present invention includes the steps of:
the first step is as follows: taking the length of a sub-pixel row direction as the period of a photomask on the first substrate side, covering even sub-pixels arranged along the row direction by a light leakage gap of the photomask, and carrying out alignment in a first direction; taking the length of a sub-pixel row direction as the period of a photomask on the first substrate side, covering odd sub-pixels arranged along the row direction by a light leakage gap of the photomask, and carrying out alignment in a second direction, wherein the first direction and the second direction are both parallel to the row direction, and the first direction and the second direction are parallel and opposite;
the second step is that: 1/4 with the length of one sub-pixel row direction is taken as the period of a second substrate side photomask, and the light leakage gap of the photomask covers the second subregion and the fourth subregion to carry out alignment in the third direction; using 1/4 with a length of one sub-pixel column direction as the period of the second substrate side light shield, the light leakage gap of the light shield covers the first sub-region and the third sub-region, and the illumination is performed along the fourth direction, wherein the third direction and the fourth direction are both parallel to the row direction, and the third direction is parallel to and opposite to the fourth direction.
According to another exemplary aspect of the embodiments, the photo-alignment method disclosed in the present invention includes the steps of:
the first step is as follows: using 1/4 with a length of one sub-pixel row direction as the period of the second substrate side photomask, covering the first subregion and the third subregion by the light leakage gap of the photomask, and performing alignment in the third direction; using 1/4 with a length of one sub-pixel column direction as the period of a second substrate side photomask, and irradiating along a fourth direction by covering the second subregion and a fourth subregion with a light leakage gap of the photomask, wherein the third direction and the fourth direction are both parallel to the row direction, and the third direction is parallel to and opposite to the fourth direction;
the second step is that: taking the length of a sub-pixel row direction as the period of a photomask on the first substrate side, covering odd sub-pixels arranged along the row direction by a light leakage gap of the photomask, and carrying out alignment in a first direction; the length of a sub-pixel row direction is taken as the period of a first substrate side photomask, even sub-pixels arranged along the row direction are covered by a light leakage gap of the photomask, and the alignment of a second direction is carried out, wherein the first direction and the second direction are both parallel to the row direction, and the first direction and the second direction are parallel and opposite.
According to another exemplary aspect of the embodiments, the photo-alignment method disclosed in the present invention includes the steps of:
the first step is as follows: using 1/4 with a length of one sub-pixel row direction as the period of the second substrate side photomask, covering the first subregion and the third subregion by the light leakage gap of the photomask, and performing alignment in the third direction; using 1/4 with a length of one sub-pixel column direction as the period of a second substrate side photomask, and irradiating along a fourth direction by covering the second subregion and a fourth subregion with a light leakage gap of the photomask, wherein the third direction and the fourth direction are both parallel to the row direction, and the third direction is parallel to and opposite to the fourth direction;
the second step is that: taking the length of a sub-pixel row direction as the period of a photomask on the first substrate side, covering even sub-pixels arranged along the row direction by a light leakage gap of the photomask, and carrying out alignment in a first direction; the length of a sub-pixel row direction is taken as the period of a first substrate side photomask, the light leakage gaps of the photomask cover odd sub-pixels arranged along the row direction, and alignment in a second direction is carried out, wherein the first direction and the second direction are both parallel to the row direction, and the first direction and the second direction are parallel and opposite.
According to another exemplary aspect of the embodiments, the photo-alignment method disclosed in the present invention includes the steps of:
the first step is as follows: 1/4 with the length of one sub-pixel row direction is taken as the period of a second substrate side photomask, and the light leakage gap of the photomask covers the second subregion and the fourth subregion to carry out alignment in the third direction; using 1/4 with a length of a sub-pixel column direction as a period of a second substrate side photomask, and irradiating along a fourth direction by covering the first subregion and a third subregion with a light leakage gap of the photomask, wherein the third direction and the fourth direction are both parallel to the row direction, and the third direction is parallel to and opposite to the fourth direction;
the second step is that: taking the length of a sub-pixel row direction as the period of a photomask on the first substrate side, covering odd sub-pixels arranged along the row direction by a light leakage gap of the photomask, and carrying out alignment in a first direction; the length of a sub-pixel row direction is taken as the period of a first substrate side photomask, even sub-pixels arranged along the row direction are covered by a light leakage gap of the photomask, and the alignment of a second direction is carried out, wherein the first direction and the second direction are both parallel to the row direction, and the first direction and the second direction are parallel and opposite.
According to another exemplary aspect of the embodiments, the photo-alignment method disclosed in the present invention includes the steps of:
the first step is as follows: 1/4 with the length of one sub-pixel row direction is taken as the period of a second substrate side photomask, and the light leakage gap of the photomask covers the second subregion and the fourth subregion to carry out alignment in the third direction; using 1/4 with a length of a sub-pixel column direction as a period of a second substrate side photomask, and irradiating along a fourth direction by covering the first subregion and a third subregion with a light leakage gap of the photomask, wherein the third direction and the fourth direction are both parallel to the row direction, and the third direction is parallel to and opposite to the fourth direction;
the second step is that: taking the length of a sub-pixel row direction as the period of a photomask on the first substrate side, covering even sub-pixels arranged along the row direction by a light leakage gap of the photomask, and carrying out alignment in a first direction; the length of a sub-pixel row direction is taken as the period of a first substrate side photomask, the light leakage gaps of the photomask cover odd sub-pixels arranged along the row direction, and alignment in a second direction is carried out, wherein the first direction and the second direction are both parallel to the row direction, and the first direction and the second direction are parallel and opposite.
Further, the mask used in the first step and/or the second step is a halftone mask.
The application also discloses a liquid crystal panel manufactured by adopting any one of the optical alignment methods.
The light alignment method disclosed by the invention can reduce dark stripes in the pixel area and improve the transmittance of the display panel. When the first substrate and the second substrate are formed into a box, if box deviation occurs, the problem of color deviation cannot be caused; compared with the prior art, the liquid crystal panel disclosed by the invention can improve color cast and has higher transmittance.
Drawings
The present invention will be further described in the following detailed description of preferred embodiments, which is to be read in connection with the accompanying drawings.
FIG. 1 is a prior art UV liquid crystal panel2A, a flow diagram of photo-alignment;
FIG. 2 is a schematic diagram of a pixel region of a liquid crystal panel with dark cross-hatching in the prior art;
FIG. 3 is a diagram illustrating the four-domain size of the pixel region when the prior art liquid crystal panel is shifted in cell;
FIG. 4 is a schematic top view of six adjacent sub-pixels of an LCD panel according to the present invention;
FIG. 5 is a schematic flow chart illustrating a photo-alignment process of a liquid crystal panel according to a first embodiment of the present invention;
FIG. 6 is a schematic diagram illustrating tilt angles of liquid crystal molecules in four domains of a pixel region of the liquid crystal panel shown in FIG. 5;
FIG. 7 is a diagram illustrating the four-domain size of the pixel region when the liquid crystal panel shown in FIG. 5 is shifted in cell;
FIG. 8 is a schematic flow chart illustrating a photo-alignment process of a liquid crystal panel according to a second embodiment of the present invention;
fig. 9 is a schematic diagram of tilt angles of liquid crystal molecules in four domains of the pixel region of the liquid crystal panel shown in fig. 8.
Detailed Description
The invention is further elucidated with reference to the drawings and the embodiments. It is to be understood that the figures only schematically show parts relevant to the present invention and they do not represent actual structures as products. The upper, lower, left and right correspondence in the embodiment is set based on the manufacturing process, and does not limit the scope of the present invention. The drawings and examples are only for purposes of illustrating the invention and are not to be construed as limiting the scope of the invention, which is defined in the claims appended hereto, as may be amended by those skilled in the art upon reading the present disclosure in a manner equivalent to the present invention.
The liquid crystal panel of the present invention includes: the liquid crystal display panel comprises an array substrate, a color film substrate and a liquid crystal positioned between the array substrate and the color film substrate, wherein the array substrate and the color film substrate are opposite; the array substrate is provided with criss-cross scanning lines and data lines, and a plurality of sub-pixel regions are defined by the scanning lines and the data lines in a crossed manner on the array substrate and the color film substrate.
The direction along which the sub-pixel units of different colors are arranged is defined as a row direction, and the direction perpendicular to the row direction is defined as a column direction.
Example 1:
the photo-alignment process of the present embodiment is illustrated by taking six adjacent sub-pixels in fig. 4 as an example.
The side of the sub-pixel along the row direction is defined as a first side, and the side perpendicular to the row direction is defined as a second side.
In fig. 4, the first edge length of one sub-pixel is c, the second edge length is d, and the magnitude relationship between c and d is not limited. Each sub-pixel is equally divided into a first sub-region 21, a second sub-region 22, a third sub-region 23, and a fourth sub-region 24 in the column direction.
The sub-pixels are arranged in the row direction as a first sub-pixel 11, a second sub-pixel 12, a third sub-pixel 13, a fourth sub-pixel 14, a fifth sub-pixel 15, a sixth sub-pixel 16, and so on. The first subpixel 11, the third subpixel 13, the fifth subpixel 15, and so on are defined as odd-numbered subpixels arranged in the row direction, and the second subpixel 12, the fourth subpixel 14, the sixth subpixel 16, and so on are defined as even-numbered subpixels arranged in the row direction.
As shown in fig. 6, the plurality of sub-pixel regions are separated by a black matrix 30, and the black matrix 30 plays a role of preventing light leakage and separating different color layers.
Example 1 has 8 scenarios with the following:
fig. 5 is a schematic view of the optical alignment process of this embodiment, and the optical alignment steps are as follows:
first protocol for example 1: carrying out alignment in the row direction and then in the column direction; firstly carrying out alignment of odd-numbered sub-pixels arranged along the row direction and then carrying out alignment of even-numbered sub-pixels arranged along the row direction; the alignment of the first sub-region 21 and the third sub-region 23 is performed first and then the alignment of the second sub-region 22 and the fourth sub-region 24 is performed.
The first protocol of example 1 comprises the following steps:
the first step is as follows:
taking the first side length c as the period of the array substrate side mask, the light leakage slit of the mask covers the odd sub-pixels (such as the first sub-pixel 11, the third sub-pixel 13, the fifth sub-pixel 15, etc.) arranged along the row direction, and the alignment in the first direction (the first direction is the direction a shown in fig. 5, i.e. from top to bottom) is performed; taking the first side length c as the period of the array substrate side photomask, the light leakage gap of the photomask covers even sub-pixels (such as the second sub-pixel 12, the fourth sub-pixel 14, the sixth sub-pixel 16, etc.) arranged along the row direction, and the alignment in the second direction (the second direction is the B direction shown in fig. 5, namely from bottom to top) is performed; the first direction and the second direction are both parallel to the row direction, and the first direction and the second direction are parallel and opposite;
the second step is that:
using 1/4 with the second side length as the period of the color film substrate side photomask, the light leakage gap of the photomask covers the first subregion 21 and the third subregion 23, and the alignment in the third direction (the third direction is the C direction shown in fig. 5, i.e. from right to left) is performed; using 1/4 with the second side length as the period of the color film substrate side photomask, the light leakage gap of the photomask covers the second subregion 22 and the fourth subregion 24, and the alignment in the fourth direction (the fourth direction is the D direction shown in fig. 5, i.e. from left to right) is performed; the third direction and the fourth direction are both parallel to the row direction, and the third direction and the fourth direction are parallel and opposite in direction.
After the photo-alignment is completed, four domains are sequentially formed in one sub-pixel along the column direction, and the tilt angles of the liquid crystal molecules in the four domains are shown by arrows in fig. 6.
As shown in fig. 6, in the present embodiment, the same ten-thousand dark fringe is generated in the range of two sub-pixels, and at this time, a long fringe extending along the column direction in the center of the ten-thousand dark fringe is generated at the position of the black matrix 30 between two adjacent sub-pixels. The area occupied by the ten thousand dark stripes in a single sub-pixel is reduced compared with the prior art, and the light alignment method of the embodiment can further improve the transmittance (more than or equal to 4%) of the liquid crystal panel.
As shown in fig. 7, when the array substrate and the color filter substrate are formed into a box, if a box shift occurs, the four-domain area in the first sub-pixel 11 becomes smaller, and the four-domain area in the fourth sub-pixel 14 becomes larger, so that the two sub-pixels are the same color sub-pixels and have complementary areas. Similarly, the second sub-pixel 12 and the fifth sub-pixel 15 are same color sub-pixels and have complementary areas, the third sub-pixel 13 and the sixth sub-pixel 16 are same color sub-pixels and have complementary areas, and so on. Therefore, the liquid crystal panel of the present embodiment does not have the problem of color shift when cell shift occurs.
In other embodiments, the alignment in the row direction may be performed first, and then the alignment in the column direction may be performed, the method including the steps of:
second protocol for example 1: carrying out alignment in a row direction and then alignment in a column direction; firstly carrying out alignment of odd-numbered sub-pixels arranged along the row direction and then carrying out alignment of even-numbered sub-pixels arranged along the row direction; the alignment of the first sub-region 21 and the third sub-region 23 is performed first and then the alignment of the second sub-region 22 and the fourth sub-region 24 is performed.
The second protocol of example 1 was followed:
the first step is as follows:
using 1/4 with the second side length as the period of the color film substrate side photomask, the light leakage gap of the photomask covers the first subregion 21 and the third subregion 23, and the alignment in the third direction (the third direction is the C direction shown in fig. 5, i.e. from right to left) is performed; using 1/4 with the second side length as the period of the color film substrate side photomask, the light leakage gap of the photomask covers the second subregion 22 and the fourth subregion 24, and the alignment in the fourth direction (the fourth direction is the D direction shown in fig. 5, i.e. from left to right) is performed; the third direction and the fourth direction are both parallel to the row direction, and the third direction and the fourth direction are parallel and opposite in direction.
The second step is that:
taking the first side length c as the period of the array substrate side mask, the light leakage slit of the mask covers the odd sub-pixels (such as the first sub-pixel 11, the third sub-pixel 13, the fifth sub-pixel 15, etc.) arranged along the row direction, and the alignment in the first direction (the first direction is the direction a shown in fig. 5, i.e. from top to bottom) is performed; taking the first side length c as the period of the array substrate side photomask, the light leakage gap of the photomask covers even sub-pixels (such as the second sub-pixel 12, the fourth sub-pixel 14, the sixth sub-pixel 16, etc.) arranged along the row direction, and the alignment in the second direction (the second direction is the B direction shown in fig. 5, namely from bottom to top) is performed; the first direction and the second direction are both parallel to the row direction, and the first direction and the second direction are parallel and opposite;
in another embodiment, the alignment of the even sub-pixels arranged along the row direction may be performed first, and then the alignment of the odd sub-pixels arranged along the row direction may be performed, the method including the steps of:
third protocol for example 1: carrying out alignment in the row direction and then in the column direction; firstly carrying out alignment of even sub-pixels arranged along the row direction and then carrying out alignment of odd sub-pixels arranged along the row direction; the alignment of the first sub-region 21 and the third sub-region 23 is performed first and then the alignment of the second sub-region 22 and the fourth sub-region 24 is performed.
The third protocol of example 1 was followed:
the first step is as follows:
taking the first side length c as the period of the array substrate side mask, the light leakage gaps of the mask cover the even sub-pixels (such as the second sub-pixel 12, the fourth sub-pixel 14, the sixth sub-pixel 16, etc.) arranged along the row direction, and the alignment in the first direction (the first direction is the direction a shown in fig. 5, i.e. from top to bottom) is performed; taking the first side length c as the period of the array substrate side photomask, the light leakage gap of the photomask covers the odd sub-pixels (such as the first sub-pixel 11, the third sub-pixel 13, the fifth sub-pixel 15, etc.) arranged along the row direction, and the alignment in the second direction (the second direction is the B direction shown in fig. 5, i.e. from bottom to top) is performed; the first direction and the second direction are both parallel to the row direction, and the first direction and the second direction are parallel and opposite;
the second step is that:
using 1/4 with the second side length as the period of the color film substrate side photomask, the light leakage gap of the photomask covers the first subregion 21 and the third subregion 23, and the alignment in the third direction (the third direction is the C direction shown in fig. 5, i.e. from right to left) is performed; using 1/4 with the second side length as the period of the color film substrate side photomask, the light leakage gap of the photomask covers the second subregion 22 and the fourth subregion 24, and the alignment in the fourth direction (the fourth direction is the D direction shown in fig. 5, i.e. from left to right) is performed; the third direction and the fourth direction are both parallel to the row direction, and the third direction and the fourth direction are parallel and opposite in direction.
Fourth protocol for example 1: carrying out alignment in a row direction and then alignment in a column direction; firstly carrying out alignment of even sub-pixels arranged along the row direction and then carrying out alignment of odd sub-pixels arranged along the row direction; the alignment of the first sub-region 21 and the third sub-region 23 is performed first and then the alignment of the second sub-region 22 and the fourth sub-region 24 is performed.
The fourth protocol of example 1 was followed:
the first step is as follows:
using 1/4 with the second side length as the period of the color film substrate side photomask, the light leakage gap of the photomask covers the first subregion 21 and the third subregion 23, and the alignment in the third direction (the third direction is the C direction shown in fig. 5, i.e. from right to left) is performed; using 1/4 with the second side length as the period of the color film substrate side photomask, the light leakage gap of the photomask covers the second subregion 22 and the fourth subregion 24, and the alignment in the fourth direction (the fourth direction is the D direction shown in fig. 5, i.e. from left to right) is performed; the third direction and the fourth direction are both parallel to the row direction, and the third direction and the fourth direction are parallel and opposite in direction.
The second step is that:
taking the first side length c as the period of the array substrate side mask, the light leakage gaps of the mask cover the even sub-pixels (such as the second sub-pixel 12, the fourth sub-pixel 14, the sixth sub-pixel 16, etc.) arranged along the row direction, and the alignment in the first direction (the first direction is the direction a shown in fig. 5, i.e. from top to bottom) is performed; taking the first side length c as the period of the array substrate side photomask, the light leakage gap of the photomask covers the odd sub-pixels (such as the first sub-pixel 11, the third sub-pixel 13, the fifth sub-pixel 15, etc.) arranged along the row direction, and the alignment in the second direction (the second direction is the B direction shown in fig. 5, i.e. from bottom to top) is performed; the first direction and the second direction are both parallel to the row direction, and the first direction and the second direction are parallel and opposite;
in other embodiments, the alignment of the second sub-region 22 and the fourth sub-region 24 may be performed before the alignment of the first sub-region 21 and the third sub-region 23, and the method includes the following steps:
fifth protocol for example 1: firstly, carrying out alignment in a row direction and a column direction; firstly carrying out alignment of odd-numbered sub-pixels arranged along the row direction and then carrying out alignment of even-numbered sub-pixels arranged along the row direction; the alignment of the second sub-region 22 and the fourth sub-region 24 is performed first and then the alignment of the first sub-region 21 and the third sub-region 23 is performed.
The specific steps of the fifth protocol of example 1 are as follows:
the first step is as follows:
taking the first side length c as the period of the array substrate side mask, the light leakage slit of the mask covers the odd sub-pixels (such as the first sub-pixel 11, the third sub-pixel 13, the fifth sub-pixel 15, etc.) arranged along the row direction, and the alignment in the first direction (the first direction is the direction a shown in fig. 5, i.e. from top to bottom) is performed; taking the first side length c as the period of the array substrate side photomask, the light leakage gap of the photomask covers even sub-pixels (such as the second sub-pixel 12, the fourth sub-pixel 14, the sixth sub-pixel 16, etc.) arranged along the row direction, and the alignment in the second direction (the second direction is the B direction shown in fig. 5, namely from bottom to top) is performed; the first direction and the second direction are both parallel to the row direction, and the first direction and the second direction are parallel and opposite;
the second step is that:
using 1/4 with the second side length as the period of the color film substrate side photomask, the light leakage gap of the photomask covers the second subregion 22 and the fourth subregion 24, and the alignment in the third direction (the third direction is the C direction shown in fig. 5, i.e. from right to left) is performed; using 1/4 with the second side length as the period of the color film substrate side photomask, the light leakage gap of the photomask covers the first subregion 21 and the third subregion 23, and the alignment in the fourth direction (the fourth direction is the D direction shown in fig. 5, i.e. from left to right) is performed; the third direction and the fourth direction are both parallel to the row direction, and the third direction and the fourth direction are parallel and opposite in direction.
A sixth protocol of example 1: carrying out alignment in a row direction and then carrying out alignment in a column direction; firstly carrying out alignment of odd-numbered sub-pixels arranged along the row direction and then carrying out alignment of even-numbered sub-pixels arranged along the row direction; the alignment of the second sub-region 22 and the fourth sub-region 24 is performed first and then the alignment of the first sub-region 21 and the third sub-region 23 is performed.
The specific steps of the sixth protocol of example 1 are as follows:
the first step is as follows:
using 1/4 with the second side length as the period of the color film substrate side photomask, the light leakage gap of the photomask covers the second subregion 22 and the fourth subregion 24, and the alignment in the third direction (the third direction is the C direction shown in fig. 5, i.e. from right to left) is performed; using 1/4 with the second side length as the period of the color film substrate side photomask, the light leakage gap of the photomask covers the first subregion 21 and the third subregion 23, and the alignment in the fourth direction (the fourth direction is the D direction shown in fig. 5, i.e. from left to right) is performed; the third direction and the fourth direction are both parallel to the row direction, and the third direction and the fourth direction are parallel and opposite in direction.
The second step is that:
taking the first side length c as the period of the array substrate side mask, the light leakage slit of the mask covers the odd sub-pixels (such as the first sub-pixel 11, the third sub-pixel 13, the fifth sub-pixel 15, etc.) arranged along the row direction, and the alignment in the first direction (the first direction is the direction a shown in fig. 5, i.e. from top to bottom) is performed; taking the first side length c as the period of the array substrate side photomask, the light leakage gap of the photomask covers even sub-pixels (such as the second sub-pixel 12, the fourth sub-pixel 14, the sixth sub-pixel 16, etc.) arranged along the row direction, and the alignment in the second direction (the second direction is the B direction shown in fig. 5, namely from bottom to top) is performed; the first direction and the second direction are both parallel to the row direction, and the first direction and the second direction are parallel and opposite;
the seventh protocol of example 1: firstly, carrying out alignment in a row direction and a column direction; firstly carrying out alignment of even sub-pixels arranged along the row direction and then carrying out alignment of odd sub-pixels arranged along the row direction; the alignment of the second sub-region 22 and the fourth sub-region 24 is performed first and then the alignment of the first sub-region 21 and the third sub-region 23 is performed.
The seventh protocol of example 1 comprises the following specific steps:
the first step is as follows:
taking the first side length c as the period of the array substrate side mask, the light leakage gaps of the mask cover the even sub-pixels (such as the second sub-pixel 12, the fourth sub-pixel 14, the sixth sub-pixel 16, etc.) arranged along the row direction, and the alignment in the first direction (the first direction is the direction a shown in fig. 5, i.e. from top to bottom) is performed; taking the first side length c as the period of the array substrate side photomask, the light leakage gap of the photomask covers the odd sub-pixels (such as the first sub-pixel 11, the third sub-pixel 13, the fifth sub-pixel 15, etc.) arranged along the row direction, and the alignment in the second direction (the second direction is the B direction shown in fig. 5, i.e. from bottom to top) is performed; the first direction and the second direction are both parallel to the row direction, and the first direction and the second direction are parallel and opposite;
the second step is that:
using 1/4 with the second side length as the period of the color film substrate side photomask, the light leakage gap of the photomask covers the second subregion 22 and the fourth subregion 24, and the alignment in the third direction (the third direction is the C direction shown in fig. 5, i.e. from right to left) is performed; using 1/4 with the second side length as the period of the color film substrate side photomask, the light leakage gap of the photomask covers the first subregion 21 and the third subregion 23, and the alignment in the fourth direction (the fourth direction is the D direction shown in fig. 5, i.e. from left to right) is performed; the third direction and the fourth direction are both parallel to the row direction, and the third direction and the fourth direction are parallel and opposite in direction.
Eighth protocol for example 1: carrying out alignment in a row direction and then carrying out alignment in a column direction; firstly carrying out alignment of even sub-pixels arranged along the row direction and then carrying out alignment of odd sub-pixels arranged along the row direction; the alignment of the second sub-region 22 and the fourth sub-region 24 is performed first and then the alignment of the first sub-region 21 and the third sub-region 23 is performed.
The specific steps of the eighth protocol of example 1 are as follows:
the first step is as follows:
using 1/4 with the second side length as the period of the color film substrate side photomask, the light leakage gap of the photomask covers the second subregion 22 and the fourth subregion 24, and the alignment in the third direction (the third direction is the C direction shown in fig. 5, i.e. from right to left) is performed; using 1/4 with the second side length as the period of the color film substrate side photomask, the light leakage gap of the photomask covers the first subregion 21 and the third subregion 23, and the alignment in the fourth direction (the fourth direction is the D direction shown in fig. 5, i.e. from left to right) is performed; the third direction and the fourth direction are both parallel to the row direction, and the third direction and the fourth direction are parallel and opposite in direction.
The second step is that:
taking the first side length c as the period of the array substrate side mask, the light leakage gaps of the mask cover the even sub-pixels (such as the second sub-pixel 12, the fourth sub-pixel 14, the sixth sub-pixel 16, etc.) arranged along the row direction, and the alignment in the first direction (the first direction is the direction a shown in fig. 5, i.e. from top to bottom) is performed; taking the first side length c as the period of the array substrate side photomask, the light leakage gap of the photomask covers the odd sub-pixels (such as the first sub-pixel 11, the third sub-pixel 13, the fifth sub-pixel 15, etc.) arranged along the row direction, and the alignment in the second direction (the second direction is the B direction shown in fig. 5, i.e. from bottom to top) is performed; the first direction and the second direction are both parallel to the row direction, and the first direction and the second direction are parallel and opposite;
in other embodiments, for any of the eight schemes of embodiment 1, the first step thereof may be performed on the color filter substrate side, and the second step thereof may be performed on the array substrate side.
Example 2:
example 2 is also given, differing from example 1 in that a half-tone mask is used in the photo-alignment process of the first or second step.
In embodiment 1, if the non-halftone mask is used in both the first step and the second step, after the photo-alignment is completed, the tilt angles of the liquid crystal molecules in the first sub-region and the third sub-region of each sub-pixel are the same, and the tilt angles of the liquid crystal molecules in the second sub-region and the fourth sub-region are the same, a "false 4-domain" phenomenon may occur, which affects the viewing angle performance of the liquid crystal panel. The "false 4-domain" phenomenon can be addressed by using a halftone mask in photo-alignment or by using voltage coupling in array design.
In embodiment 2, the halftone mask is used in the first step or the second step, so that the tilt angles of the four-domain liquid crystal molecules in the sub-pixel regions are all controlled to be different, and the transmittances in the four domains are different, thereby realizing true 4-domain display.
In this example, an improvement is made on the first embodiment of example 1, in which a halftone mask is used in the second step, and the step of photo-alignment is shown in fig. 8.
The specific optical alignment steps are as follows:
the first step is as follows:
taking the first side length c as the period of the array substrate side photomask, the light leakage gap of the photomask covers the odd sub-pixels (such as the first sub-pixel 11, the third sub-pixel 13, the fifth sub-pixel 15, etc.) arranged along the row direction, and the alignment in the first direction (the first direction is the A direction shown in FIG. 5, namely from top to bottom) is carried out, at this time, the halftone photomask is not adopted, namely, the even sub-pixel regions arranged along the row direction are completely shielded, and the light transmittance in the odd sub-pixel regions arranged along the row direction is the same;
then, the first edge length c is taken as the period of the array substrate side photomask, the light leakage gaps of the photomask cover the even sub-pixels (such as the second sub-pixel 12, the fourth sub-pixel 14, the sixth sub-pixel 16 and the like) arranged along the row direction, and the alignment in the second direction (the second direction is the B direction shown in fig. 5, namely from bottom to top) is carried out, at this time, the half tone photomask is not adopted, namely, the light is fully shielded in the odd sub-pixel regions arranged along the row direction, and the light transmittance in the even sub-pixel regions arranged along the row direction is the same;
the first direction and the second direction are both parallel to the row direction, and the first direction and the second direction are parallel and opposite;
the second step is that:
using 1/4 with the second side length as the period of the color film substrate side photomask, the light leakage gap of the photomask covers the first subregion 21 and the third subregion 23, and performing alignment in the third direction (the third direction is the C direction shown in fig. 5, i.e. from right to left), at this time, a halftone photomask is used to completely shield the second subregion 22 and the fourth subregion 24, and the transmittances of the first subregion 21 and the third subregion 23 are different;
then, 1/4 with the second side length is used as the period of the color film substrate side photomask, the light leakage gap of the photomask covers the second subregion 22 and the fourth subregion 24, and the alignment in the fourth direction (the fourth direction is the D direction shown in fig. 5, i.e., from left to right) is performed, at this time, the halftone photomask is used to completely shield the first subregion 21 and the third subregion 23, and the transmittances of the second subregion 22 and the fourth subregion 24 are different;
the third direction and the fourth direction are both parallel to the column direction, and the third direction and the fourth direction are parallel and opposite in direction;
after the photo-alignment is completed, the tilt angles of the liquid crystal molecules in the four domains of the sub-pixel region are as shown in fig. 9. At this time, the inclination angles of the liquid crystals in the first subregion 21 and the third subregion 23 form a certain included angle, and the transmittances are different; the inclination angles of the liquid crystal in the second sub-region 22 and the fourth sub-region 24 form a certain included angle, and the transmittance is different, so that the inclination angles of the liquid crystal molecules in the four domains are different, the true 4-domain display is realized, and the liquid crystal panel has better visual angle performance.
While a halftone mask is used in the second step of the first scheme of example 1 in this embodiment, in other embodiments, any of the eight schemes of example 1 may be modified to use a halftone mask in the first and/or second steps thereof.
In this embodiment, the transmittance of the partial light-transmitting region of the halftone mask is between 70% and 95%, so as to control the tilt angles of the liquid crystals in different domains to be different and the included angles to be appropriate, and increase the viewing angle of the liquid crystal panel.
According to the embodiments and the combination thereof, the invention also provides a liquid crystal panel manufactured by the optical alignment method. The dark stripes in each sub-pixel of the liquid crystal panel have higher transmittance than the liquid crystal panel of the prior art shown in fig. 2, as shown in fig. 6. And no color shift occurs when the cell shift occurs in the liquid crystal panel.
According to the optical alignment method disclosed by the invention, after optical alignment is finished, the same ten-thousand-character dark stripe is generated in the range of two sub-pixels, and at the moment, a long stripe extending along the second direction at the center of the ten-thousand-character dark stripe is generated at the position of a black matrix 30 between two adjacent sub-pixels. Compared with the prior art, the transmittance (more than or equal to 4%) of the liquid crystal panel can be further improved. When the liquid crystal panel manufactured by the optical alignment method of the invention is subjected to box forming of the array substrate and the color film substrate, if box deviation occurs, the problem of color deviation is not generated. In the photo-alignment process, a halftone photomask is used, so that different liquid crystal molecule inclination angles and different transmittances in four domains of a sub-pixel region can be controlled, and real 4-domain display is realized. Compared with the prior art, the liquid crystal panel disclosed by the invention can improve color cast and has higher transmittance.
It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that various modifications and adaptations can be made by those skilled in the art without departing from the principle of the present invention, and should be considered as the scope of the present invention.

Claims (9)

1. A photo-alignment method of a liquid crystal panel, the liquid crystal panel comprising: the liquid crystal display panel comprises a first substrate, a second substrate and a liquid crystal, wherein the first substrate and the second substrate are opposite, the liquid crystal is positioned between the first substrate and the second substrate, the first substrate and the second substrate are respectively provided with a plurality of sub-pixels which are oppositely arranged, the arrangement direction of the sub-pixels with different colors is defined as a row direction, the direction vertical to the row direction is defined as a column direction, the sub-pixels comprise odd sub-pixels arranged along the row direction and even sub-pixels arranged along the row direction, and each sub-pixel is divided into a first sub-area, a second sub-area, a third sub-area and a fourth sub-area along the column direction, and the liquid crystal display panel is characterized by comprising the following steps:
the first step is as follows: taking the length of a sub-pixel row direction as the period of a photomask on the first substrate side, covering odd sub-pixels arranged along the row direction by a light leakage gap of the photomask, and carrying out alignment in a first direction; taking the length of a sub-pixel row direction as the period of a photomask on the first substrate side, covering even sub-pixels arranged along the row direction by a light leakage gap of the photomask, and carrying out alignment in a second direction, wherein the first direction and the second direction are both parallel to the row direction, and the first direction and the second direction are parallel and opposite;
the second step is that: using 1/4 with a length of one sub-pixel row direction as the period of the second substrate side photomask, covering the first subregion and the third subregion by the light leakage gap of the photomask, and performing alignment in the third direction; using 1/4 with a length of one sub-pixel column direction as the period of a second substrate side photomask, and irradiating along a fourth direction by covering the second subregion and a fourth subregion with a light leakage gap of the photomask, wherein the third direction and the fourth direction are both parallel to the row direction, and the third direction is parallel to and opposite to the fourth direction;
the light shade adopted in the first step and/or the second step is a half-tone light shade so as to control different pouring angles of liquid crystal molecules in four domains of each sub-pixel and different transmittances in the four domains of each sub-pixel, wherein the four domains are respectively a first subregion, a third subregion, a second subregion and a fourth subregion; for six adjacent sub-pixels in the same row, the first sub-pixel and the fourth sub-pixel are same-color sub-pixels, the second sub-pixel and the fifth sub-pixel are same-color sub-pixels, and the third sub-pixel and the sixth sub-pixel are same-color sub-pixels.
2. A photo-alignment method of a liquid crystal panel, the liquid crystal panel comprising: the liquid crystal display panel comprises a first substrate, a second substrate and a liquid crystal, wherein the first substrate and the second substrate are opposite, the liquid crystal is positioned between the first substrate and the second substrate, the first substrate and the second substrate are respectively provided with a plurality of sub-pixels which are oppositely arranged, the arrangement direction of the sub-pixels with different colors is defined as a row direction, the direction vertical to the row direction is defined as a column direction, the sub-pixels comprise odd sub-pixels arranged along the row direction and even sub-pixels arranged along the row direction, and each sub-pixel is divided into a first sub-area, a second sub-area, a third sub-area and a fourth sub-area along the column direction, and the liquid crystal display panel is characterized by comprising the following steps:
the first step is as follows: taking the length of a sub-pixel row direction as the period of a photomask on the first substrate side, covering even sub-pixels arranged along the row direction by a light leakage gap of the photomask, and carrying out alignment in a first direction; taking the length of a sub-pixel row direction as the period of a photomask on the first substrate side, covering odd sub-pixels arranged along the row direction by a light leakage gap of the photomask, and carrying out alignment in a second direction, wherein the first direction and the second direction are both parallel to the row direction, and the first direction and the second direction are parallel and opposite;
the second step is that: using 1/4 with a length of one sub-pixel row direction as the period of the second substrate side photomask, covering the first subregion and the third subregion by the light leakage gap of the photomask, and performing alignment in the third direction; using 1/4 with a length of one sub-pixel column direction as the period of a second substrate side photomask, and irradiating along a fourth direction by covering the second subregion and a fourth subregion with a light leakage gap of the photomask, wherein the third direction and the fourth direction are both parallel to the row direction, and the third direction is parallel to and opposite to the fourth direction;
the light shade adopted in the first step and/or the second step is a half-tone light shade so as to control different pouring angles of liquid crystal molecules in four domains of each sub-pixel and different transmittances in the four domains of each sub-pixel, wherein the four domains are respectively a first subregion, a third subregion, a second subregion and a fourth subregion; for six adjacent sub-pixels in the same row, the first sub-pixel and the fourth sub-pixel are same-color sub-pixels, the second sub-pixel and the fifth sub-pixel are same-color sub-pixels, and the third sub-pixel and the sixth sub-pixel are same-color sub-pixels.
3. A photo-alignment method of a liquid crystal panel, the liquid crystal panel comprising: the liquid crystal display panel comprises a first substrate, a second substrate and a liquid crystal, wherein the first substrate and the second substrate are opposite, the liquid crystal is positioned between the first substrate and the second substrate, the first substrate and the second substrate are respectively provided with a plurality of sub-pixels which are oppositely arranged, the arrangement direction of the sub-pixels with different colors is defined as a row direction, the direction vertical to the row direction is defined as a column direction, the sub-pixels comprise odd sub-pixels arranged along the row direction and even sub-pixels arranged along the row direction, and each sub-pixel is divided into a first sub-area, a second sub-area, a third sub-area and a fourth sub-area along the column direction, and the liquid crystal display panel is characterized by comprising the following steps:
the first step is as follows: taking the length of a sub-pixel row direction as the period of a photomask on the first substrate side, covering odd sub-pixels arranged along the row direction by a light leakage gap of the photomask, and carrying out alignment in a first direction; taking the length of a sub-pixel row direction as the period of a photomask on the first substrate side, covering even sub-pixels arranged along the row direction by a light leakage gap of the photomask, and carrying out alignment in a second direction, wherein the first direction and the second direction are both parallel to the row direction, and the first direction and the second direction are parallel and opposite;
the second step is that: 1/4 with the length of one sub-pixel row direction is taken as the period of a second substrate side photomask, and the light leakage gap of the photomask covers the second subregion and the fourth subregion to carry out alignment in the third direction; using 1/4 with a length of a sub-pixel column direction as a period of a second substrate side photomask, and irradiating along a fourth direction by covering the first subregion and a third subregion with a light leakage gap of the photomask, wherein the third direction and the fourth direction are both parallel to the row direction, and the third direction is parallel to and opposite to the fourth direction;
the light shade adopted in the first step and/or the second step is a half-tone light shade so as to control different pouring angles of liquid crystal molecules in four domains of each sub-pixel and different transmittances in the four domains of each sub-pixel, wherein the four domains are respectively a first subregion, a third subregion, a second subregion and a fourth subregion; for six adjacent sub-pixels in the same row, the first sub-pixel and the fourth sub-pixel are same-color sub-pixels, the second sub-pixel and the fifth sub-pixel are same-color sub-pixels, and the third sub-pixel and the sixth sub-pixel are same-color sub-pixels.
4. A photo-alignment method of a liquid crystal panel, the liquid crystal panel comprising: the liquid crystal display panel comprises a first substrate, a second substrate and a liquid crystal, wherein the first substrate and the second substrate are opposite, the liquid crystal is positioned between the first substrate and the second substrate, the first substrate and the second substrate are respectively provided with a plurality of sub-pixels which are oppositely arranged, the arrangement direction of the sub-pixels with different colors is defined as a row direction, the direction vertical to the row direction is defined as a column direction, the sub-pixels comprise odd sub-pixels arranged along the row direction and even sub-pixels arranged along the row direction, and each sub-pixel is divided into a first sub-area, a second sub-area, a third sub-area and a fourth sub-area along the column direction, and the liquid crystal display panel is characterized by comprising the following steps:
the first step is as follows: taking the length of a sub-pixel row direction as the period of a photomask on the first substrate side, covering even sub-pixels arranged along the row direction by a light leakage gap of the photomask, and carrying out alignment in a first direction; taking the length of a sub-pixel row direction as the period of a photomask on the first substrate side, covering odd sub-pixels arranged along the row direction by a light leakage gap of the photomask, and carrying out alignment in a second direction, wherein the first direction and the second direction are both parallel to the row direction, and the first direction and the second direction are parallel and opposite;
the second step is that: 1/4 with the length of one sub-pixel row direction is taken as the period of a second substrate side photomask, and the light leakage gap of the photomask covers the second subregion and the fourth subregion to carry out alignment in the third direction; using 1/4 with a length of a sub-pixel column direction as a period of a second substrate side photomask, and irradiating along a fourth direction by covering the first subregion and a third subregion with a light leakage gap of the photomask, wherein the third direction and the fourth direction are both parallel to the row direction, and the third direction is parallel to and opposite to the fourth direction;
the light shade adopted in the first step and/or the second step is a half-tone light shade so as to control different pouring angles of liquid crystal molecules in four domains of each sub-pixel and different transmittances in the four domains of each sub-pixel, wherein the four domains are respectively a first subregion, a third subregion, a second subregion and a fourth subregion; for six adjacent sub-pixels in the same row, the first sub-pixel and the fourth sub-pixel are same-color sub-pixels, the second sub-pixel and the fifth sub-pixel are same-color sub-pixels, and the third sub-pixel and the sixth sub-pixel are same-color sub-pixels.
5. A photo-alignment method of a liquid crystal panel, the liquid crystal panel comprising: the liquid crystal display panel comprises a first substrate, a second substrate and a liquid crystal, wherein the first substrate and the second substrate are opposite, the liquid crystal is positioned between the first substrate and the second substrate, the first substrate and the second substrate are respectively provided with a plurality of sub-pixels which are oppositely arranged, the arrangement direction of the sub-pixels with different colors is defined as a row direction, the direction vertical to the row direction is defined as a column direction, the sub-pixels comprise odd sub-pixels arranged along the row direction and even sub-pixels arranged along the row direction, and each sub-pixel is divided into a first sub-area, a second sub-area, a third sub-area and a fourth sub-area along the column direction, and the liquid crystal display panel is characterized by comprising the following steps:
the first step is as follows: using 1/4 with a length of one sub-pixel row direction as the period of the second substrate side photomask, covering the first subregion and the third subregion by the light leakage gap of the photomask, and performing alignment in the third direction; using 1/4 with a length of one sub-pixel column direction as the period of a second substrate side photomask, and irradiating along a fourth direction by covering the second subregion and a fourth subregion with a light leakage gap of the photomask, wherein the third direction and the fourth direction are both parallel to the row direction, and the third direction is parallel to and opposite to the fourth direction;
the second step is that: taking the length of a sub-pixel row direction as the period of a photomask on the first substrate side, covering odd sub-pixels arranged along the row direction by a light leakage gap of the photomask, and carrying out alignment in a first direction; taking the length of a sub-pixel row direction as the period of a photomask on the first substrate side, covering even sub-pixels arranged along the row direction by a light leakage gap of the photomask, and carrying out alignment in a second direction, wherein the first direction and the second direction are both parallel to the row direction, and the first direction and the second direction are parallel and opposite;
the light shade adopted in the first step and/or the second step is a half-tone light shade so as to control different pouring angles of liquid crystal molecules in four domains of each sub-pixel and different transmittances in the four domains of each sub-pixel, wherein the four domains are respectively a first subregion, a third subregion, a second subregion and a fourth subregion; for six adjacent sub-pixels in the same row, the first sub-pixel and the fourth sub-pixel are same-color sub-pixels, the second sub-pixel and the fifth sub-pixel are same-color sub-pixels, and the third sub-pixel and the sixth sub-pixel are same-color sub-pixels.
6. A photo-alignment method of a liquid crystal panel, the liquid crystal panel comprising: the liquid crystal display panel comprises a first substrate, a second substrate and a liquid crystal, wherein the first substrate and the second substrate are opposite, the liquid crystal is positioned between the first substrate and the second substrate, the first substrate and the second substrate are respectively provided with a plurality of sub-pixels which are oppositely arranged, the arrangement direction of the sub-pixels with different colors is defined as a row direction, the direction vertical to the row direction is defined as a column direction, the sub-pixels comprise odd sub-pixels arranged along the row direction and even sub-pixels arranged along the row direction, and each sub-pixel is divided into a first sub-area, a second sub-area, a third sub-area and a fourth sub-area along the column direction, and the liquid crystal display panel is characterized by comprising the following steps:
the first step is as follows: using 1/4 with a length of one sub-pixel row direction as the period of the second substrate side photomask, covering the first subregion and the third subregion by the light leakage gap of the photomask, and performing alignment in the third direction; using 1/4 with a length of one sub-pixel column direction as the period of a second substrate side photomask, and irradiating along a fourth direction by covering the second subregion and a fourth subregion with a light leakage gap of the photomask, wherein the third direction and the fourth direction are both parallel to the row direction, and the third direction is parallel to and opposite to the fourth direction;
the second step is that: taking the length of a sub-pixel row direction as the period of a photomask on the first substrate side, covering even sub-pixels arranged along the row direction by a light leakage gap of the photomask, and carrying out alignment in a first direction; taking the length of a sub-pixel row direction as the period of a photomask on the first substrate side, covering odd sub-pixels arranged along the row direction by a light leakage gap of the photomask, and carrying out alignment in a second direction, wherein the first direction and the second direction are both parallel to the row direction, and the first direction and the second direction are parallel and opposite;
the light shade adopted in the first step and/or the second step is a half-tone light shade so as to control different pouring angles of liquid crystal molecules in four domains of each sub-pixel and different transmittances in the four domains of each sub-pixel, wherein the four domains are respectively a first subregion, a third subregion, a second subregion and a fourth subregion; for six adjacent sub-pixels in the same row, the first sub-pixel and the fourth sub-pixel are same-color sub-pixels, the second sub-pixel and the fifth sub-pixel are same-color sub-pixels, and the third sub-pixel and the sixth sub-pixel are same-color sub-pixels.
7. A photo-alignment method of a liquid crystal panel, the liquid crystal panel comprising: the liquid crystal display panel comprises a first substrate, a second substrate and a liquid crystal, wherein the first substrate and the second substrate are opposite, the liquid crystal is positioned between the first substrate and the second substrate, the first substrate and the second substrate are respectively provided with a plurality of sub-pixels which are oppositely arranged, the arrangement direction of the sub-pixels with different colors is defined as a row direction, the direction vertical to the row direction is defined as a column direction, the sub-pixels comprise odd sub-pixels arranged along the row direction and even sub-pixels arranged along the row direction, and each sub-pixel is divided into a first sub-area, a second sub-area, a third sub-area and a fourth sub-area along the column direction, and the liquid crystal display panel is characterized by comprising the following steps:
the first step is as follows: 1/4 with the length of one sub-pixel row direction is taken as the period of a second substrate side photomask, and the light leakage gap of the photomask covers the second subregion and the fourth subregion to carry out alignment in the third direction; using 1/4 with a length of a sub-pixel column direction as a period of a second substrate side photomask, and irradiating along a fourth direction by covering the first subregion and a third subregion with a light leakage gap of the photomask, wherein the third direction and the fourth direction are both parallel to the row direction, and the third direction is parallel to and opposite to the fourth direction;
the second step is that: taking the length of a sub-pixel row direction as the period of a photomask on the first substrate side, covering odd sub-pixels arranged along the row direction by a light leakage gap of the photomask, and carrying out alignment in a first direction; taking the length of a sub-pixel row direction as the period of a photomask on the first substrate side, covering even sub-pixels arranged along the row direction by a light leakage gap of the photomask, and carrying out alignment in a second direction, wherein the first direction and the second direction are both parallel to the row direction, and the first direction and the second direction are parallel and opposite;
the light shade adopted in the first step and/or the second step is a half-tone light shade so as to control different pouring angles of liquid crystal molecules in four domains of each sub-pixel and different transmittances in the four domains of each sub-pixel, wherein the four domains are respectively a first subregion, a third subregion, a second subregion and a fourth subregion; for six adjacent sub-pixels in the same row, the first sub-pixel and the fourth sub-pixel are same-color sub-pixels, the second sub-pixel and the fifth sub-pixel are same-color sub-pixels, and the third sub-pixel and the sixth sub-pixel are same-color sub-pixels.
8. A photo-alignment method of a liquid crystal panel, the liquid crystal panel comprising: the liquid crystal display panel comprises a first substrate, a second substrate and a liquid crystal, wherein the first substrate and the second substrate are opposite, the liquid crystal is positioned between the first substrate and the second substrate, the first substrate and the second substrate are respectively provided with a plurality of sub-pixels which are oppositely arranged, the arrangement direction of the sub-pixels with different colors is defined as a row direction, the direction vertical to the row direction is defined as a column direction, the sub-pixels comprise odd sub-pixels arranged along the row direction and even sub-pixels arranged along the row direction, and each sub-pixel is divided into a first sub-area, a second sub-area, a third sub-area and a fourth sub-area along the column direction, and the liquid crystal display panel is characterized by comprising the following steps:
the first step is as follows: 1/4 with the length of one sub-pixel row direction is taken as the period of a second substrate side photomask, and the light leakage gap of the photomask covers the second subregion and the fourth subregion to carry out alignment in the third direction; using 1/4 with a length of a sub-pixel column direction as a period of a second substrate side photomask, and irradiating along a fourth direction by covering the first subregion and a third subregion with a light leakage gap of the photomask, wherein the third direction and the fourth direction are both parallel to the row direction, and the third direction is parallel to and opposite to the fourth direction;
the second step is that: taking the length of a sub-pixel row direction as the period of a photomask on the first substrate side, covering even sub-pixels arranged along the row direction by a light leakage gap of the photomask, and carrying out alignment in a first direction; taking the length of a sub-pixel row direction as the period of a photomask on the first substrate side, covering odd sub-pixels arranged along the row direction by a light leakage gap of the photomask, and carrying out alignment in a second direction, wherein the first direction and the second direction are both parallel to the row direction, and the first direction and the second direction are parallel and opposite;
the light shade adopted in the first step and/or the second step is a half-tone light shade so as to control different pouring angles of liquid crystal molecules in four domains of each sub-pixel and different transmittances in the four domains of each sub-pixel, wherein the four domains are respectively a first subregion, a third subregion, a second subregion and a fourth subregion; for six adjacent sub-pixels in the same row, the first sub-pixel and the fourth sub-pixel are same-color sub-pixels, the second sub-pixel and the fifth sub-pixel are same-color sub-pixels, and the third sub-pixel and the sixth sub-pixel are same-color sub-pixels.
9. A liquid crystal panel fabricated by the photoalignment method of any one of claims 1 to 8.
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Publication number Priority date Publication date Assignee Title
CN109459891B (en) * 2018-12-29 2022-05-03 成都中电熊猫显示科技有限公司 Light alignment method of display panel, display panel and display device
CN110045548B (en) * 2019-06-06 2021-12-07 成都中电熊猫显示科技有限公司 Mask equipment

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103257480A (en) * 2013-05-27 2013-08-21 南京中电熊猫液晶显示科技有限公司 Alignment method for liquid crystal VA model
CN103389598A (en) * 2012-05-10 2013-11-13 群康科技(深圳)有限公司 Distribution-balanced multi-horizon liquid crystal display
CN104483779A (en) * 2014-11-20 2015-04-01 深圳市华星光电技术有限公司 UV2A pixel structure
CN104730857A (en) * 2015-03-24 2015-06-24 南京中电熊猫液晶显示科技有限公司 Mask plate of liquid crystal display panel and exposure method using mask plate
CN104932147A (en) * 2015-06-19 2015-09-23 深圳市华星光电技术有限公司 Manufacturing table and method for liquid crystal display panel
CN105158995A (en) * 2015-10-27 2015-12-16 深圳市华星光电技术有限公司 Pixel electrode and array substrate
CN105759508A (en) * 2016-04-21 2016-07-13 深圳市华星光电技术有限公司 Light alignment device for liquid crystal display panel

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101613629B1 (en) * 2009-01-19 2016-04-20 삼성디스플레이 주식회사 Liquid crystal display device, method of manufacturing the same and alignment layer composition
KR102070436B1 (en) * 2013-07-02 2020-01-29 삼성디스플레이 주식회사 Liquid crystal display

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103389598A (en) * 2012-05-10 2013-11-13 群康科技(深圳)有限公司 Distribution-balanced multi-horizon liquid crystal display
CN103257480A (en) * 2013-05-27 2013-08-21 南京中电熊猫液晶显示科技有限公司 Alignment method for liquid crystal VA model
CN104483779A (en) * 2014-11-20 2015-04-01 深圳市华星光电技术有限公司 UV2A pixel structure
CN104730857A (en) * 2015-03-24 2015-06-24 南京中电熊猫液晶显示科技有限公司 Mask plate of liquid crystal display panel and exposure method using mask plate
CN104932147A (en) * 2015-06-19 2015-09-23 深圳市华星光电技术有限公司 Manufacturing table and method for liquid crystal display panel
CN105158995A (en) * 2015-10-27 2015-12-16 深圳市华星光电技术有限公司 Pixel electrode and array substrate
CN105759508A (en) * 2016-04-21 2016-07-13 深圳市华星光电技术有限公司 Light alignment device for liquid crystal display panel

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