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

• US 9,250,466 B2
• Filed: 10/10/2012
• Issued: 02/02/2016
• Est. Priority Date: 10/24/2011
• Status: Active Grant

• Current Assignee: BOE Technology Group Co., Ltd.
• Original Assignee: BOE Technology Group Co., Ltd.
• Inventors: Lu, Jinbo, Zhao, Jisheng, Xue, Jianshe, Liu, Chen
• Primary Examiner(s): Kim, Richard
• Assistant Examiner(s): Hsu, Kendrick
• Application Number:
  US13/703,119
• Publication Number:
  US 20140078452A1
• Time in Patent Office: 1,210 Days
• Field of Search: 349/106, 349/114
• US Class Current: 1/1
• CPC Class Codes: G02B 5/201 in the form of arrays
• CPC Class Codes: G02B 5/22 Absorbing filters G02B5/201 - G02B5/208 take precedence
• CPC Class Codes: G02F 1/133514 Colour filters
• CPC Class Codes: G02F 1/133516 Methods for their manufacture, e.g. printing, electro-deposition or photolithography
• CPC Class Codes: G02F 1/133555 Transflectors

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.

Claims

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 μ

m to 3 μ

m.

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 μ

m to 3 μ

m.

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.