Display device, color filter and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-9720275-B2
Application number	US-201314350479-A
Country	US
Kind code	B2
Filing date	Dec 12, 2013
Priority date	Apr 28, 2013
Publication date	Aug 1, 2017
Grant date	Aug 1, 2017

Abstract

A method of manufacturing a color filter is provided. The method includes: forming at least black matrix electrodes, first electrodes, second electrodes and third electrodes insulated from each other on a base substrate; and depositing at least a black matrix layer, a first color filter pattern, a second color filter pattern and a third color filter patter on the base substrate using an electrophoretic deposition process respectively by means of the black matrix electrodes, the first electrodes, the second electrodes and the third electrodes. A color filter and a display device are also provided. The described solution provides a process which is simple, convenient to operate, ease of control, and allows fast film formation.

First claim

What is claimed is:

1. A method of manufacturing a color filter, comprising:
step 1, at least forming black matrix electrodes, first electrodes, second electrodes and third electrodes insulated from each other on a base substrate; and
step 2, at least forming a black matrix layer, a first color filter pattern, a second color filter pattern and a third color filter pattern on the base substrate using an electrophoretic deposition process respectively by the black matrix electrodes, the first electrodes, the second electrodes and the third electrodes; wherein the step 1 comprises:
forming the black matrix electrodes with a plurality of opening areas on the base substrate, the plurality of opening areas of the black matrix electrodes defining at least a first sub-pixel area, a second sub-pixel area and a third sub-pixel area;
forming an insulating layer on a side of the black matrix electrode facing away from the base substrate; and
forming the first electrodes, the second electrodes and the third electrodes on a side of the insulating layer facing away from the black matrix electrodes, wherein the first electrodes are formed in portions of the side corresponding to the first sub-pixel areas, the second electrodes are formed in portions corresponding to the second sub-pixel areas and the third electrodes are formed in portions corresponding to the third sub-pixel areas.

2. The method of manufacturing a color filter according to claim 1 , wherein
the step 2 comprises:
providing an electrophoresis bath filled with a first suspension containing charged black matrix pigment particles;
providing an electrode substrate;
dipping the base substrate that has experienced the step 1 and the electrode substrate in the first suspension, wherein the black matrix electrodes on the base substrate are disposed oppositely to the electrode substrate; and
applying a voltage with opposite polarities onto the black matrix electrodes and the electrode substrate, respectively, wherein the voltage applied onto the black matrix electrodes has a polarity opposite to that of charges carried by the black matrix pigment particles, the black matrix pigment particles are deposited on the base substrate in portions corresponding to the black matrix electrodes to form the black matrix layer.

3. The method of manufacturing a color filter according to claim 2 , further comprising:
removing the base substrate and cleaning and curing it after depositing the black matrix pigment particles on the base substrate in portions corresponding to the black matrix electrodes in the step 2.

4. The method of manufacturing a color filter according to claim 2 , wherein the black matrix pigment particles are made of acid black 1, acid black 210 or acid black 234 material.

5. The method of manufacturing a color filter according to claim 2 , wherein the step 2 further comprises:
providing an electrophoresis bath filled with a second suspension containing charged first color pigment particles;
dipping the base substrate that has experienced the step 1 and the electrode substrate in the second suspension, wherein the first electrodes on the base substrate are disposed oppositely to the electrode substrate; and
applying a voltage with opposite polarities onto the first electrodes and the electrode substrate respectively, wherein the voltage applied onto the first electrodes has a polarity opposite to that of charges carried by the first color pigment particles, the first color pigment particles are deposited on the first electrodes of the base substrate to form the first color filter pattern.

6. The method of manufacturing a color filter according to claim 5 , wherein the first color pigment particles are made of acid red or metal complex red material.

7. The method of manufacturing a color filter according to claim 5 , further comprising:
removing the base substrate and cleaning and curing it after depositing the first color pigment particles on the first electrodes of the base substrate in the step 2.

8. The method of manufacturing a color filter according to claim 5 , wherein the step 2 further comprises:
providing an electrophoresis bath filled with a third suspension containing charged second color pigment particles;
dipping the base substrate that has experienced the step 1 and the electrode substrate in the third suspension, wherein the second electrodes on the base substrate are disposed oppositely to the electrode substrate; and
applying a voltage with opposite polarities onto the second electrodes and the electrode substrate respectively, wherein the voltage applied onto the second electrodes has a polarity opposite to that of the charges carried by the second color pigment particles, the second color pigment particles are deposited on the second electrodes of the base substrate to form the second color filter pattern.

9. The method of manufacturing a color filter according to claim 8 , wherein the second color pigment particles are made of metal complex green material.

10. The method of manufacturing a color filter according to claim 8 , further comprising:
removing the base substrate and cleaning and curing it after depositing the second color pigment particles on the second electrodes of the base substrate in the step 2.

11. The method of manufacturing a color filter according to claim 8 , wherein the step 2 further comprises:
providing an electrophoresis bath filled with a fourth suspension containing charged third color pigment particles;
dipping the base substrate that has experienced the step 1 and the electrode substrate in the fourth suspension, wherein the third electrodes on the base substrate are disposed oppositely to the electrode substrate; and
applying a voltage with opposite polarities onto the third electrodes and the electrode substrate respectively, wherein the voltage applied onto the third electrodes has a polarity opposite to that of the charges carried by the third color pigment particles, the third color pigment particles are deposited on the third electrodes of the base substrate to form the third color filter pattern.

12. The method of manufacturing a color filter according to claim 11 , wherein the third color pigment particles are made of metal complex blue material.

13. The method of manufacturing a color filter according to claim 11 , further comprising: removing the base substrate and cleaning and curing it after depositing the third color pigment particles on the third electrodes of the base substrate in the step 2.

14. A color filter manufactured by the method of claim 1 , wherein
the first color filter pattern is formed on the base substrate in portions corresponding to the first electrodes;
the second color filter pattern is formed on the base substrate in portions corresponding to the second electrodes; and
the third color filter pattern is formed on the base substrate in portions corresponding to the third electrodes.

15. The color filter according to claim 14 , wherein
the first color filter pattern is formed on a side of the first electrodes facing away from the insulating layer and corresponds to the locations of the first electrodes;
the second color filter pattern is formed on a side of the second electrodes facing away from the insulating layer and corresponds to the locations of the second electrodes; and
the third color filter pattern is formed on a side of the third electrodes facing away from the insulating layer and corresponds to the locations of the third electrodes.

16. A display device, comprising the color filter according to claim 14 .

Assignees

• Boe Technology Group Co Ltd
• Chengdu Boe Optoelect Tech Co

Inventors

• Yan Shaning

Classifications

• C25D13/12

  characterised by the article coated · CPC title

• G02F1/133512

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

• C25D13/20

  Pretreatment · CPC title

• C25D13/22

  Servicing or operating {apparatus or multistep processes} · CPC title

• C25D13/02

  with inorganic material · CPC title