Method for repairing a display panel and a display panel

Patent metadata

Field	Value
Publication number	US-11237415-B2
Application number	US-201816303735-A
Country	US
Kind code	B2
Filing date	Mar 23, 2018
Priority date	Jul 7, 2017
Publication date	Feb 1, 2022
Grant date	Feb 1, 2022

Abstract

A method of repairing a display panel comprising: determining a pixel where a bright spot defect resides and a position of the bright spot in the pixel; setting a repair region, the repair region being a region in the pixel including the bright spot defect and having an area smaller than that of a single pixel region; forming a black material layer in the repair region, the black material layer being used for preventing light emitted from a directly-below portion thereof from leaving a display surface of the display panel.

First claim

The invention claimed is:

1. A method for repairing a display panel, the display panel comprising a plurality of pixels for display, each of the pixels including a color filter film on a substrate, at least a portion of the pixels having a bright spot defect, the bright spot defect being a constantly bright spot within a single pixel region, wherein the method comprises:
determining a pixel where the bright spot defect resides and a position of the bright spot defect in the pixel;
setting a repair region, the repair region being a region in the pixel including the bright spot defect and having an area smaller than that of the single pixel region; and
forming a black material layer in the repair region for preventing light emitted from a directly-below portion thereof from leaving a display surface of the display panel,
wherein forming a black material layer in the repair region comprises: performing carbonization treatment on the color filter film in the repair region using a laser, and performing modification treatment on the color filter film in the repair region using a laser prior to performing carbonization treatment on the color filter film in the repair region;
and wherein parameters of the laser for the modification treatment comprise: a wavelength of 349 nm; an energy level of 200 to 400 nJ; an operating rate of 150 to 300 μm/s; and a frequency of 40 to 60 Hz, wherein the operating rate is a traveling speed of the laser device.

2. The method according to claim 1 , wherein parameters of the laser for the carbonization treatment comprise:
for red and green filter films, a wavelength of 446 nm; an energy level of 1050 to 1350 nJ; and an operating rate of 60 to 80 μm/s; for a blue filter film, a wavelength of 446 nm; an energy level of 1350 to 1590 nJ; and an operating rate of 60 to 80 μm/s.

3. The method according to claim 1 , wherein the display panel is a liquid crystal display panel.

Assignees

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

Inventors

• Wang Haiping
• Yan Xu
• Jia Pingping
• Xi Ying
• Guo Dong

Classifications

• G02F1/133512

  Light shielding layers, e.g. black matrix (G02F1/136209 takes precedence) · CPC title

• G02F1/1309 Primary

  Repairing; Testing · CPC title

• G02F1/133516

  Methods for their manufacture, e.g. printing, electro-deposition or photolithography · CPC title

• G02F1/133514

  Colour filters · CPC title