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Friction alignment method and device thereof

A technology of alignment device and rubbing cloth, which is applied in the direction of instruments, nonlinear optics, optics, etc., can solve the problems of regional alignment ability differences, waste, friction defects, etc., to improve production quality and authenticity rate, maintain consistency, reduce Quantity effect

Inactive Publication Date: 2021-01-26
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the rubbing alignment process, when the rubbing roller rolls on the surface of the substrate along the set direction, the step difference on the surface of the substrate will cause defects such as local hairiness, less hairiness or damage to the rubbing cloth. There is a difference between the regional alignment ability and the normal area, resulting in the difference or inversion of the pretilt angle of the liquid crystal alignment in the local area, that is, the occurrence of rubbing defects (Rubbing Mura), resulting in poor display
[0004] At present, for the microscopic process of rubbing alignment, the existing technology cannot effectively monitor the alignment quality during the rubbing alignment process, and can only realize the rubbing defect by detecting the substrate after the rubbing alignment is completed. When rubbing defects are detected, a large number of substrates have already been aligned, resulting in large waste

Method used

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  • Friction alignment method and device thereof
  • Friction alignment method and device thereof
  • Friction alignment method and device thereof

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0071] figure 2 It is a flow chart of the first embodiment of the rubbing alignment method of the present invention. Such as figure 2 As shown, the rubbing alignment method of this embodiment includes:

[0072] S11. During the process of rubbing and aligning the substrate, measure the resilience of the rubbing cloth;

[0073] S12, generating friction traces on the substrate according to the resilience force;

[0074] S13, judging the quality of the rubbing alignment according to the rubbing traces.

[0075] This embodiment provides a rubbing alignment method, which realizes effective monitoring of alignment quality during the rubbing alignment process. The technical idea of ​​this embodiment is that for rubbing alignment, the alignment ability refers to the strength of the alignment film's ability to align liquid crystal molecules in a certain direction, which can be characterized by measuring the optical anisotropy value DΔ of the alignment film. The larger the DΔ, the...

no. 2 example

[0079] image 3 It is a flow chart of the second embodiment of the rubbing alignment method of the present invention. Such as image 3 As shown, the rubbing alignment method of this embodiment includes:

[0080] S21. During the process of rubbing and aligning the substrate, measure the resilience of the rubbing cloth;

[0081] S22. Generate friction traces on the substrate according to the resilience force;

[0082] S23. When judging that the rebound force exceeds a preset standard threshold, mark the friction marks corresponding to the rebound force;

[0083] S24. Determine defect points of the rubbing cloth according to the marks.

[0084] This embodiment provides a rubbing alignment method, which realizes effective monitoring of defects of the rubbing cloth during the rubbing alignment process. The technical idea of ​​this embodiment is that, for the normal rubbing alignment process, under the same press-in amount and friction pressure, the rubbing cloth will produce t...

no. 3 example

[0091] Figure 4 It is a flow chart of the third embodiment of the rubbing alignment method of the present invention. Such as Figure 4 As shown, the rubbing alignment method of this embodiment includes:

[0092] S31, measuring the characteristic length of the fluff of the rubbing cloth;

[0093] S32. Calculate the mean value and deviation value of the characteristic length;

[0094] S33, judging whether the deviation value is less than or equal to the preset standard deviation value, if yes, execute step 34, otherwise execute step 38;

[0095] S34. Set the pressing amount of the friction cloth according to the average value;

[0096] S35. Control the friction cloth to press into the substrate according to the press-in amount, and start friction alignment;

[0097] S36. During the process of rubbing and aligning the substrate, measure the resilience of the rubbing cloth;

[0098] S37. Generate friction traces on the substrate according to the resilience force;

[0099] ...

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Abstract

Embodiments of the present invention provide a frictional alignment method and device thereof. The rubbing alignment method includes: during the rubbing alignment process, measuring the resilience of the rubbing cloth; and generating rubbing marks of the substrate according to the resilience. The present invention not only realizes the effective monitoring of the rubbing alignment quality in the rubbing alignment process, but also realizes the effective monitoring of the rubbing alignment in the rubbing alignment process cloth defects. Compared with the prior art, the present invention effectively monitors the rubbing alignment quality and rubbing cloth defects during the rubbing alignment process, so that rubbing defects can be found in time and corresponding treatment can be performed, reducing the number of substrates with rubbing defects, and the maximum Waste is avoided to a minimum.

Description

technical field [0001] The invention relates to the technical field of display technology production, in particular to a friction alignment method and a device thereof. Background technique [0002] A Liquid Crystal Display (LCD) panel is formed by combining an array substrate and a color filter substrate, and liquid crystal is drip-filled between the array substrate and the color filter substrate. In order to arrange the liquid crystal molecules in a certain direction in the absence of an electric field, an alignment film is provided on the opposite surfaces of the array substrate and the color filter substrate, and grooves arranged in a certain direction are arranged on the alignment film. The grooves can In the absence of an electric field, the liquid crystal molecules are uniformly arranged on the surface of the substrate along the grooves according to the set direction, and the alignment of a plurality of liquid crystal molecules is realized. Usually, the grooves on th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/1337
Inventor 井杨坤
Owner BOE TECH GRP CO LTD