TOUCH SENSING DISPLAY PANEL, TOUCH SENSING COLOR FILTER AND FABRICATING METHOD THEREOF

• US 20090322702A1
• Filed: 12/29/2008
• Published: 12/31/2009
• Est. Priority Date: 06/25/2008
• Status: Active Grant

• Current Assignee: AU Optronics Corporation
• Original Assignee: AU Optronics Corporation
• Inventors: Chien, Yu-Feng, Yang, Tun-Chun, Hu, Chih-Jen, Lee, Seok-Lyul
• Granted Patent: US 8,134,527 B2
• Time in Patent Office: Days
• US Class Current: 345/174
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes

Abstract

A touch sensing color filter including a substrate, a black matrix, a color filter layer and a second sensing electrode layer is provided. The black matrix is disposed on the substrate to define a plurality of sub-pixel areas. The black matrix includes a first sensing electrode layer, and the first sensing electrode layer has a plurality of openings corresponding to the sub-pixel areas. The color filter layer includes a plurality of color filter units disposed in the sub-pixel areas respectively. The second sensing electrode layer is disposed on the substrate, and the second sensing electrode layer includes a plurality of sub patterns corresponding to the sub-pixel areas. A method for fabricating the touch sensing color filter and a display panel using the same are further provided.

Claims

1. A touch sensing color filter, comprising:

a substrate;

a black matrix disposed on the substrate to define a plurality of sub-pixel areas, the black matrix comprising a first sensing electrode layer having a plurality of openings corresponding to the sub-pixel areas;

a color filter layer, comprising a plurality of color filter units respectively disposed in the sub-pixel areas; and

a second sensing electrode layer disposed on the substrate and comprising a plurality of sub patterns corresponding to the sub-pixel areas respectively.

2. The touch sensing color filter as claimed in claim 1, wherein the sub patterns of the second sensing electrode layer are respectively disposed on the color filter units of the color filter layer.

3. The touch sensing color filter as claimed in claim 2, further comprising a first dielectric layer covering the color filter layer and the black matrix, and the second sensing electrode layer being disposed on the first dielectric layer.

4. The touch sensing color filter as claimed in claim 1, further comprising a second dielectric layer disposed between the black matrix and the substrate, and the second sensing electrode layer being disposed between the second dielectric layer and the substrate.

5. The touch sensing color filter as claimed in claim 1, further comprising a third dielectric layer covering the black matrix, the color filter layer, and the second sensing electrode layer.

6. The touch sensing color filter as claimed in claim 5, further comprising a common electrode layer disposed on the third dielectric layer.

7. The touch sensing color filter as claimed in claim 1, wherein a material of the first sensing electrode layer is an opaque metal.

8. The touch sensing color filter as claimed in claim 1, wherein the black matrix further comprises a black resin layer overlapping the first sensing electrode layer.

9. The touch sensing color filter as claimed in claim 1, wherein a material of the second sensing electrode layer is a transparent conductor.

10. The touch sensing color filter as claimed in claim 1, wherein the black matrix further comprises an anti-reflective layer disposed between the first sensing electrode layer and the substrate.

11. The touch sensing color filter as claimed in claim 1, wherein the first sensing electrode layer is an X electrode comprising a plurality of individual sensing blocks, wherein each sensing block corresponds to a plurality of sub-pixel areas.

12. The touch sensing color filter as claimed in claim 11, wherein the second sensing electrode layer is a Y electrode, and the sub patterns of the second sensing electrode layer are divided into a plurality of groups corresponding to the sensing blocks and the sub patterns of each group are serially connected with one another.

13. A fabricating method of a touch sensing color filter, comprising:

providing a substrate;

forming a black matrix including a first sensing electrode layer on the substrate to define a plurality of sub-pixel areas, wherein the black matrix including the first sensing electrode layer has a plurality of openings corresponding to the sub-pixel areas in the first sensing electrode layer;

forming a plurality of color filter units in the sub-pixel areas; and

forming a second sensing electrode layer on the substrate, wherein the second sensing electrode layer comprises a plurality of sub patterns corresponding to the sub-pixel areas respectively.

14. The fabricating method as claimed in claim 13, wherein the black matrix is formed on the substrate first, and the sub patterns of the second sensing electrode layer are formed on the color filter units after the color filter units are formed.

15. The fabricating method as claimed in claim 14, further comprising forming a first dielectric layer to cover the color filter units and the black matrix after the black matrix and the color filter units are formed.

16. The fabricating method as claimed in claim 13, further comprising forming a second dielectric layer to cover the second sensing electrode layer after the second sensing electrode layer is formed on the substrate.

17. The fabricating method as claimed in claim 13, further comprising forming a third dielectric layer to cover the black matrix, the color filter units, and the second sensing electrode layer.

18. The fabricating method as claimed in claim 17, further comprising forming a common electrode layer on the third dielectric layer.

19. The fabricating method as claimed in claim 13, wherein a process of forming the black matrix further comprises forming a black resin layer overlapping the first sensing electrode layer.

20. The fabricating method as claimed in claim 13, wherein the process of forming the black matrix further comprises forming an anti-reflective layer between the first sensing electrode layer and the substrate.

21. A touch sensing display panel, comprising:

a color filter, comprising;

a black matrix comprising a first sensing electrode layer disposed on the substrate to define a plurality of sub-pixel areas, and the black matrix comprising the first sensing electrode layer having a plurality of openings corresponding to the sub-pixel areas;

a color filter layer, comprising a plurality of color filter units respectively disposed in the sub-pixel areas; and

a second sensing electrode layer disposed on the substrate and comprising

a plurality of sub patterns corresponding to the sub-pixel areas respectively; and

a display array substrate; and

a liquid crystal layer disposed between the color filter and the display array substrate.