Method for rubbing alignment layer and liquid crystal display panel

• US 9,632,363 B2
• Filed: 10/30/2014
• Issued: 04/25/2017
• Est. Priority Date: 06/19/2014
• Status: Active Grant

• Current Assignee: Beijing BOE Optoelectronics Technology Co Ltd. (BOE Technology Group Co., Ltd.), BOE Technology Group Co., Ltd.
• Original Assignee: Beijing BOE Optoelectronics Technology Co Ltd. (BOE Technology Group Co., Ltd.), BOE Technology Group Co., Ltd.
• Inventors: Li, Hongpeng, Song, Sunghun, Li, Jingpeng
• Primary Examiner(s): Briggs, Nathanael R
• Application Number:
  US14/528,246
• Publication Number:
  US 20150370134A1
• Time in Patent Office: 908 Days
• CPC Class Codes: G02F 1/133723 Polyimide, polyamide-imide
• CPC Class Codes: G02F 1/133753 with different alignment orientations or pretilt angles on a same surface, e.g. for grey scale or improved viewing angle
• CPC Class Codes: G02F 1/133757 with different alignment orientations
• CPC Class Codes: G02F 1/133784 by rubbing
• CPC Class Codes: G02F 1/13394 spacers regularly patterned on the cell subtrate, e.g. walls, pillars G02F1/133377 takes precedence

Abstract

The present disclosure provides a method for rubbing an alignment layer and a liquid crystal display panel. The method includes: performing a first rubbing on the alignment layer of a liquid crystal display panel in a first rubbing direction; and performing a second rubbing on the alignment layer of the liquid crystal display panel in a second rubbing direction. The second rubbing direction is an arrangement direction of liquid crystal molecules when the liquid crystal molecules are arranged correctly on the alignment layer. The second rubbing direction is different from the first rubbing direction.

Claims

1. A method for rubbing an alignment layer, comprising:

performing at least three rubbings on the alignment layer of a liquid crystal display;

wherein the performing at least three rubbings on the alignment layer of the liquid crystal display includes;

performing an N-th rubbing on the alignment layer of a liquid crystal display in a first rubbing direction; and

performing an (N+1)-th rubbing on the alignment layer on which the N-th rubbing has been performed in a second rubbing direction;

wherein N is an integer greater than 1;

the second rubbing direction is an arrangement direction of liquid crystal molecules when the liquid crystal molecules are arranged correctly on the alignment layer; and

the second rubbing direction is different from the first rubbing direction.

2. The method according to claim 1, wherein an angle between the first rubbing direction and the second rubbing direction is greater than or equal to arctan (b/a), where a represents a row pitch between spacers of the liquid crystal display panel, and b represents a width of one spacer.

3. The method according to claim 1, wherein the performing an N-th rubbing on the alignment layer of a liquid crystal display in a first rubbing direction comprises:

performing the N-th rubbing on a first surface of the alignment layer in the first rubbing direction;

the performing an (N+1)-th rubbing on the alignment layer on which the N-th rubbing has been performed in a second rubbing direction comprises;

performing the (N+1)-th rubbing on the first surface on which the N-th rubbing has been performed in the second rubbing direction.

4. The method according to claim 1, wherein an angle between the first rubbing direction and the second rubbing direction is 11°

.

5. The method according to claim 1, wherein the performing an N-th rubbing on the alignment layer of a liquid crystal display in a first rubbing direction comprises:

rubbing the alignment layer in the first rubbing direction, except for first regions of the alignment layer which correspond to spacers in the first rubbing direction;

the performing an (N+1)-th rubbing on the alignment layer on which the N-th rubbing has been performed in a second rubbing direction comprises;

rubbing the alignment layer in the second rubbing direction, except for second regions of the alignment layer which correspond to the spacers in the second rubbing direction;

wherein the first regions have at least one intersection with the second regions.

6. The method according to claim 5, wherein each of the first regions has an intersection with corresponding one of the second regions;

and an area of the intersection of each of the first regions and the corresponding one of the second regions, is smaller than an area of the corresponding one of the second regions.

7. The method according to claim 6, wherein a rubbing strength of the (N+1)-th rubbing is higher than that of the N-th rubbing.