Display panel, manufacturing method thereof, and transfer printing device

Patent metadata

Field	Value
Publication number	US-11487162-B2
Application number	US-202016955126-A
Country	US
Kind code	B2
Filing date	Mar 27, 2020
Priority date	Feb 27, 2020
Publication date	Nov 1, 2022
Grant date	Nov 1, 2022

Abstract

The present disclosure provides a display panel, a manufacturing method thereof, and a transfer printing device. In the embodiments of the present disclosure, at least one groove is defined in a transfer printing plate of the transfer printing device, through holes corresponding to blind holes can be formed in an area corresponding to the grooves, thereby preventing blocking effect of an original alignment film on light passing through the blind holes, increasing light transmittance of the blind holes, and improving an overall performance of devices with the blind holes.

First claim

What is claimed is:

1. A manufacturing method of a display panel, comprising steps as follows:
providing a functional layer with a plurality of blind holes, wherein each of the blind holes is surrounded by the functional layer;
preparing a transfer printing device, wherein the transfer printing device comprises a stage, a plate cylinder, and a transfer printing plate disposed on a side wall of the plate cylinder, wherein the stage is horizontally movable to carry a substrate, and a plurality of grooves are defined in the transfer printing plate, and each of the grooves is surrounded by the transfer printing plate; and
coating an alignment liquid on the substrate by using the transfer printing device to form an alignment film with through holes formed by the grooves of the transfer printing plate, wherein each of the through holes is surrounded by the alignment film, and the through holes directly overlap the blind holes.

2. The manufacturing method of the display panel in claim 1 , wherein the step of preparing the transfer printing device comprises:
coating the alignment liquid on the transfer printing plate of the transfer printing device.

3. The manufacturing method of the display panel in claim 1 , wherein the step of coating the alignment liquid on the substrate by using the transfer printing device to form the alignment film with through holes comprises:
rolling the transfer printing device on the substrate to correspond the grooves to the blind holes.

4. The manufacturing method of the display panel in claim 1 , wherein the step of coating the alignment liquid on the substrate by using the transfer printing device to form the alignment film with through holes comprises:
coating the alignment liquid on the substrate;
drying the alignment liquid to form an alignment layer; and
curing the alignment layer to form the alignment film.

5. The manufacturing method of the display panel in claim 4 , wherein the step of curing the alignment layer to form the alignment film comprises:
irradiating the alignment layer with infrared light to cure the alignment layer.

6. The manufacturing method of the display panel in claim 1 , wherein at least two grooves are defined in the transfer printing plate.

7. The manufacturing method of the display panel in claim 1 , wherein the groove is shaped as a circle or a regular polygon.

Assignees

• Wuhan China Star Optoelectronics Technology Co Ltd

Inventors

• Wu Yunfei
• Lin Fan

Classifications

• G02F1/1337

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

• G02F1/13378 Primary

  by treatment of the surface, e.g. embossing, rubbing or light irradiation (G02F1/133711, G02F1/133734, G02F1/133753 take precedence) · CPC title

• G02F1/133788 Primary

  by light irradiation, e.g. linearly polarised light photo-polymerisation · CPC title

• C09K2323/02

  Alignment layer characterised by chemical composition · CPC title

• B41F3/46

  Details · CPC title