Needle for repairing alignment layer, alignment layer repairing apparatus, and method for repairing alignment layer

Patent metadata

Field	Value
Publication number	US-11249348-B2
Application number	US-201716080968-A
Country	US
Kind code	B2
Filing date	Sep 8, 2017
Priority date	Sep 8, 2017
Publication date	Feb 15, 2022
Grant date	Feb 15, 2022

Abstract

The present application discloses a needle for repairing an alignment layer on a liquid crystal display substrate. The needle includes a needle tip; and a flexible material coating surrounding the needle tip.

First claim

What is claimed is:

1. A method of repairing an alignment layer on a liquid crystal display substrate, comprising:
providing a needle having a needle tip and a flexible material coating surrounding the needle tip; and
coating a defect in the alignment layer with an alignment layer repairing agent using the needle having the flexible material coating surrounding the needle tip;
wherein, prior to providing the needle, the method further comprises forming the flexible material coating surrounding the needle tip;
wherein forming the flexible material coating surrounding the needle tip comprises:
applying a curable fluid polymer material surrounding the needle tip; and
curing the curable fluid polymer material thereby forming the flexible material coating surrounding the needle tip.

2. The method of claim 1 , wherein the need tip is a tip of a hollow needle capable of holding the curable fluid polymer material in a hollow chamber; and
the method further comprises, prior to applying the curable fluid polymer material surrounding the needle tip, holding the curable fluid polymer material in the hollow chamber of the hollow needle.

3. The method of claim 2 , wherein the needle tip has an opening configured to allow the curable fluid polymer material to be dispensed out of the needle tip to be cured;
applying the curable fluid polymer material comprises pushing the curable fluid polymer material out of the needle through the opening of the needle tip, thereby forming a liquid layer of the curable fluid polymer material surrounding the needle tip.

4. The method of claim 1 , prior to coating the defect, further comprising applying the alignment layer repairing agent on the flexible material coating.

5. The method of claim 4 , wherein applying the alignment layer repairing agent on the flexible material coating comprises dipping the flexible material coating in an alignment layer repairing agent.

6. The method of claim 4 , subsequent to applying the alignment layer repairing agent on the flexible material coating, further comprising contacting the flexible material coating with the liquid crystal display substrate at a position corresponding to the defect in the alignment layer.

7. The method of claim 1 , subsequent to coating the defect, further comprising curing the alignment layer repairing agent coated in the defect thereby repairing the defect in the alignment layer.

8. The method of claim 1 , prior to coating the defect, further comprising detecting the defect in the alignment layer; and
determining a relative position of the defect in the alignment layer on the liquid crystal display substrate.

9. The method of claim 1 , wherein the needle tip has a diameter in a range of approximately 10 μm to approximately 20 μm.

10. A method of fabricating a needle for repairing an alignment layer on a liquid crystal display substrate, comprising:
providing a needle having a needle tip;
applying a curable fluid polymer material surrounding the needle tip; and
curing the curable fluid polymer material thereby forming a flexible material coating surrounding the needle tip.

11. The method of claim 10 , wherein applying the curable fluid polymer material comprises pushing the curable fluid polymer material out of the needle through an opening of the needle tip, thereby forming a liquid layer of the curable fluid polymer material surrounding the needle tip.

12. The method of claim 10 , wherein the need tip is a tip of a hollow needle capable of holding the curable fluid polymer material in a hollow chamber; and
the method further comprises, prior to applying the curable fluid polymer material surrounding the needle tip, holding the curable fluid polymer material in the hollow chamber of the hollow needle.

Assignees

• Boe Technology Group Co Ltd
• Hefei Xinsheng Optoelectronics Technology Co Ltd

Inventors

• Sun Guangyan
• Zhang Tieyi
• Huang Lin
• Yang Yu
• Zhu Yu
• Liu Xiang
• Wei Min

Classifications

• G02F1/1337 Primary

  Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers · CPC title

• G02F2201/506

  Repairing, e.g. with redundant arrangement against defective part · CPC title