Transreflective color filter and method for manufacturing the same and liquid crystal display device

Patent metadata

Field	Value
Publication number	US-9250466-B2
Application number	US-201213703119-A
Country	US
Kind code	B2
Filing date	Oct 10, 2012
Priority date	Oct 24, 2011
Publication date	Feb 2, 2016
Grant date	Feb 2, 2016

Abstract

The invention provides a transreflective color filter and a method for manufacturing the same, and a liquid crystal display device. The transreflective color filter comprises a substrate and color resin layers formed on the substrate, wherein the color resin layers include transmissive portions and reflective portions, regions of the substrate corresponding to the transmissive portions have concaves formed therein, and a part of the transmissive portion fills the concave.

First claim

The invention claimed is:

1. A transreflective color filter comprising:
a substrate; and
color resin layers formed on the substrate,
wherein the color resin layers include transmissive portions and reflective portions, regions of the substrate corresponding to the transmissive portions have concaves formed therein, and a part of the transmissive portion fills the concave;
a black matrix pattern formed on the substrate to define pixel regions,
wherein a top surface of the black matrix pattern and top surfaces of the transmissive and reflective portions are in same horizontal plane, and a thickness of the black matrix pattern is same as a thickness of the reflective portion and is smaller than a thickness of the transmissive portion, and
wherein the color resin layer is formed through the black matrix pattern in the pixel region.

2. The transreflective color filter according to claim 1 , further comprising:
a planarization layer formed on the color resin layers; and
a transparent electrode layer formed on the planarization layer.

3. The transreflective color filter according to claim 1 , further comprising:
a planarization layer formed on the color resin layers and the black matrix; and
a transparent electrode layer formed on the planarization layer.

4. The transreflective color filter according to claim 1 , wherein the depth of the concave is in a range from 0.5 μm to 3 μm.

5. The transreflective color filter according to claim 1 , wherein a thickness ratio of the reflective portion to the transmissive portion is in a range from 1:3 to 1:2.

6. The transreflective color filter according to claim 1 , wherein an area ratio of the reflective portion to the transmissive portion is in a range from 1:9 to 1:1.

7. A liquid crystal display device including a transreflective color filter, the transreflective color filter comprising:
a substrate; and
color resin layers formed on the substrate,
wherein the color resin layers include transmissive portions and reflective portions, regions of the substrate corresponding to the transmissive portions have concaves formed therein, and a part of the transmissive portion fills the concave;
wherein the transreflective color filter further comprises:
a black matrix pattern formed on the substrate to define pixel regions,
wherein a top surface of the black matrix pattern and top surfaces of the transmissive and reflective portions are in same horizontal plane, and a thickness of the black matrix pattern is same as a thickness of the reflective portion and is smaller than a thickness of the tranemissive portion, and
wherein the color resin layer is formed through the black matrix pattern in the pixel region.

8. The liquid crystal display device according to claim 7 , wherein the transreflective color filter further comprises:
a planarization layer formed on the color resin layers; and
a transparent electrode layer formed on the planarization layer.

9. The liquid crystal display device of claim 7 , wherein the transreflective color filter further comprises:
a planarization layer formed on the color resin layers and the black matrix; and
a transparent electrode layer formed on the planarization layer.

10. A method for manufacturing a transreflective color filter, which comprises:
forming concaves on a substrate; and
forming color resin layers on the substrate, wherein the color resin layers includes transmissive portions and reflective portions, locations of the transmissive portions corresponds to the concaves, and a part of the transmissive portion fills the concaves,
forming a black matrix pattern on the substrate to define pixel regions,
wherein a top surface of the black matrix pattern and top surfaces of the transmissive and reflective portions are in same horizontal plane, and a thickness of the black matrix pattern is same as a thickness of the reflective portion and is smaller than a thickness of the transmissive, and
wherein the color resin layer is formed through the black matrix pattern in the pixel region.

11. The method for manufacturing the transreflective color filter according to claim 10 , further comprising:
forming a planarization layer on the color resin layers; and
forming a transparent electrode layer on the planarization layer.

12. The method for manufacturing the transreflective color filter according to claim 10 , further comprising:
forming a planarization layer on the color resin layers and the black matrix pattern; and
forming a transparent electrode layer on the planarization layer.

13. The method for manufacturing the transrefiective color filter according to claim 10 , wherein a depth of the concave is in a range from 0.5 μm to 3 μm.

14. The method for manufacturing the transreflective color filter according to claim 10 , wherein a thickness ratio of the reflective portion to the transmissive portion is in a range from 1:3 to 1:2.

15. The method for manufacturing the transreflective color filter according to claim 10 , wherein an area ratio of the reflective portion to the transmissive portion is in a range from 1:9 to 1:1.

Assignees

• Boe Technology Group Co Ltd

Inventors

• Lu Jinbo
• Zhao Jisheng
• Xue Jianshe
• Liu Chen

Classifications

• G02B5/201

  in the form of arrays · CPC title

• G02F1/133516

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

• G02F1/133555

  Transflectors · CPC title

• G02B5/22

  Absorbing filters {(G02B5/201 - G02B5/208 take precedence)} · CPC title

• G02F1/133514 Primary

  Colour filters · CPC title