Repairing Method for Dark Spots on Copper Interconnect COA LCD Panel and Structure of Copper Interconnect COA LCD Panel

Patent metadata

Field	Value
Publication number	US-2016178939-A1
Application number	US-201514429077-A
Country	US
Kind code	A1
Filing date	Feb 9, 2015
Priority date	Dec 18, 2014
Publication date	Jun 23, 2016
Grant date	—

Abstract

A method of repairing dark spots on a COA LCD panel includes: providing a COA LCD panel having a substrate ( 11 ), a metal layer ( 12 ), a passivation layer ( 13 ), a color resistance layer ( 14 ), and a pixel electrode layer ( 15 ), the COA LCD panel including pixels, among which exist pixels of light spot defect, and via holes ( 41 ) through the color resistance layer, each via hole corresponding to one pixel; using laser from a side of the substrate ( 11 ) targeting at the via holes ( 41 ) corresponding to the defective pixel; controlling the laser to melt the metal layer ( 12 ) and welding the metal layer ( 12 ) with the pixel electrode layer ( 15 ); adjusting a relative potential and a pixel voltage of the pixel electrode layer ( 15 ) to be zero, so that a pixel area in the pixel electrode ( 15 ) layer shows as constant darkness, which finishes the repairing operation.

First claim

What is claimed is:

1 . A method of repairing dark spots on a copper interconnect color filter on array (COA) liquid crystal display (LCD) panel, comprising:
Step 1: providing a copper interconnect COA LCD panel comprising a substrate, a metal layer configured on the substrate, a passivation layer configured on the metal layer, a color resistance layer configured on the passivation layer, and a pixel electrode layer configured on the color resistance layer, the copper interconnect COA LCD panel comprising a plurality of pixels, among which exist a defective pixel of light spot defect, and a plurality of via holes through the color resistance layer, each via hole corresponding to one of the plurality of pixels; Step 2: using laser from a side of the substrate targeting at the plurality of via holes corresponding to the defective pixel on the color resistance layer; Step 3: controlling a volume of the laser so as to melt the metal layer and welding the metal layer, through the corresponding via hole, with the pixel electrode layer; and Step 4: adjusting a relative potential of the pixel electrode layer to be zero, adjusting a corresponding pixel voltage in the pixel electrode layer to be zero, so that a corresponding pixel area in the pixel electrode layer shows as constant darkness, which finishes the repairing operation.

2 . The method of claim 1 , wherein a common electrode is configured in the copper interconnect COA LCD panel, and the metal layer electrically connects to the common electrode.

3 . The method of claim 1 , wherein a thickness of the metal layer is 0.3 um, a thickness of the passivation layer is 0.4 um, a thickness of the color resistance layer 14 is 3 um and a thickness of the pixel electrode layer 15 is 0.04 um.

4 . The method of claim 1 , wherein the pixel electrode layer is made of indium tin oxide.

5 . The method of claim 1 , wherein the metal layer is made of copper or copper alloy.

6 . A copper interconnect COA LCD panel comprising: a substrate, a metal layer configured on the substrate, a passivation layer configured on the metal layer, a color resistance layer configured on the passivation layer, and a pixel electrode layer configured on the color resistance layer, wherein a plurality of pixels are configured in the copper interconnect COA LCD panel, and a plurality of via holes, corresponding to the pixels, is configured on the color resistance layer.

7 . The copper interconnect COA LCD panel of claim 6 , wherein a common electrode is configured in the copper interconnect COA LCD panel, and the metal layer electrically connects to the common electrode.

8 . The copper interconnect COA LCD panel of claim 6 , wherein a thickness of the metal layer is 0.3 um, a thickness of the passivation layer is 0.4 um, a thickness of the color resistance layer 14 is 3 um and a thickness of the pixel electrode layer 15 is 0.04 um.

9 . The copper interconnect COA LCD panel of claim 6 , wherein the pixel electrode layer is made of indium tin oxide.

10 . The copper interconnect COA LCD panel of claim 6 , wherein the metal layer is made of copper or copper alloy.

11 . A method of repairing dark spots on a copper interconnect color filter on array (COA) liquid crystal display (LCD) panel, comprising:
Step 1: providing a copper interconnect COA LCD panel comprising a substrate, a metal layer configured on the substrate, a passivation layer configured on the metal layer, a color resistance layer configured on the passivation layer, and a pixel electrode layer configured on the color resistance layer, the copper interconnect COA LCD panel comprising a plurality of pixels, among which exist a defective pixel of light spot defect, and a plurality of via holes through the color resistance layer, each via hole corresponding to one of the plurality of pixels; Step 2: using laser from a side of the substrate targeting at the plurality of via holes corresponding to the defective pixel on the color resistance layer; Step 3: controlling a volume of the laser so as to melt the metal layer and welding the metal layer, through the corresponding via hole, with the pixel electrode layer; and Step 4: adjusting a relative potential of the pixel electrode layer to be zero, adjusting a corresponding pixel voltage in the pixel electrode layer to be zero, so that a corresponding pixel area in the pixel electrode layer shows as constant darkness, which finishes the repairing operation; wherein a common electrode is configured in the copper interconnect COA LCD panel, and the metal layer electrically connects to the common electrode; wherein a thickness of the metal layer is 0.3 um, a thickness of the passivation layer is 0.4 um, a thickness of the color resistance layer 14 is 3 um and a thickness of the pixel electrode layer 15 is 0.04 um.

12 . The method of claim 11 , wherein the pixel electrode layer is made of indium tin oxide.

13 . The method of claim 11 , wherein the metal layer is made of copper or copper alloy.

Assignees

• Shenzhen China Star Optoelect

Inventors

• Cheng Quan
• Yuan Jiwang
• Sun Tao

Classifications

• G02F1/13439

  characterised by their electrical, optical, physical properties; materials therefor; method of making · CPC title

• G02F1/1309 Primary

  Repairing; Testing · CPC title

• G02F1/133514

  Colour filters · CPC title

• G02F1/136259

  Repairing; Defects · CPC title

• G02F2201/508

  Pseudo repairing, e.g. a defective part is brought into a condition in which it does not disturb the functioning of the device · CPC title