TOUCH PANEL AND LIQUID CRYSTAL DISPLAY PANEL

• US 20090096765A1
• Filed: 09/30/2008
• Published: 04/16/2009
• Est. Priority Date: 10/16/2007
• Status: Active Grant

• Current Assignee: Wintek Corporation
• Original Assignee: Wintek Corporation
• Inventors: Wang, Wen-Chun, Kuo, Chien-Chung
• Granted Patent: US 8,134,540 B2
• Time in Patent Office: Days
• US Class Current: 345/174
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/133514 Colour filters
• 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 panel having a color-filtering function is provided. The touch panel includes a first electrode layer, a second electrode layer, a first dielectric layer and a second dielectric layer. The second electrode layer is disposed above the first electrode layer. The first dielectric layer is disposed between the first electrode layer and the second electrode layer, while the second dielectric layer is disposed on the second electrode layer. Further, the second electrode layer is located between the first dielectric layer and the second dielectric layer. Here, either the first dielectric layer or the second dielectric layer is a color filter layer. A liquid crystal display panel using the above touch panel as a color filter is also provided.

Claims

1. A touch panel having a color-filtering function, the touch panel comprising:

a first electrode layer;

a second electrode layer disposed above the first electrode layer;

a first dielectric layer disposed between the first electrode layer and the second electrode layer; and

a second dielectric layer disposed on the second electrode layer and the second electrode layer located between the first dielectric layer and the second dielectric layer, wherein either the first dielectric layer or the second dielectric layer is a color filter layer.

2. The touch panel of claim 1, wherein the first electrode layer comprises a plurality of first stripe electrode patterns arranged in parallel.

3. The touch panel of claim 2, wherein the second electrode layer comprises a plurality of second stripe electrode patterns arranged in parallel, and a direction in which the second stripe electrode patterns are arranged is substantially perpendicular to a direction in which the first stripe electrode patterns are arranged.

4. The touch panel of claim 1, further comprising a substrate, wherein the first electrode layer is disposed on the substrate, the color filter layer comprises a plurality of color filter films and a black matrix defining a plurality of sub-pixel areas on the substrate, and each of the color filter films is located within one of the sub-pixel areas.

5. The touch panel of claim 4, wherein an overlapping area between the first electrode layer and the second electrode layer covers two or more sub-pixel areas.

6. The touch panel of claim 5, wherein the color filter films comprise red filter films, green filter films or blue filter films.

7. The touch panel of claim 1, further comprising a passivation layer disposed between the second electrode layer and the second dielectric layer.

8. The touch panel of claim 7, further comprising a grounding conductive layer disposed between the passivation layer and the second dielectric layer.

9. The touch panel of claim 1, further comprising a planar layer disposed on a surface of the color filter layer, wherein the surface is away from the first electrode layer.

10. The touch panel of claim 1, wherein a material of the first electrode layer and the second electrode layer comprises a transparent conductive material composed of indium tin oxide (ITO) or indium zinc oxide (IZO).

11. The touch panel of claim 1, wherein the first dielectric layer comprises a glass substrate or a plastic substrate.

12. The touch panel of claim 1, further comprising an optical lens disposed on a surface of the first electrode layer, wherein the surface is away from the first dielectric layer.

13. A liquid crystal display (LCD) panel, comprising:

a first substrate, comprising;

a first electrode layer;

a second electrode layer disposed above the first electrode layer;

a first dielectric layer disposed between the first electrode layer and the second electrode layer;

a second dielectric layer disposed on the second electrode layer and the second electrode layer located between the first dielectric layer and the second dielectric layer, wherein either the first dielectric layer or the second dielectric layer is a color filter layer; and

a third electrode layer completely covering the second dielectric layer;

a second substrate parallel to the first substrate; and

a liquid crystal layer disposed between the third electrode layer of the first substrate and the second substrate.

14. The LCD panel of claim 13, wherein the first electrode layer comprises a plurality of first stripe electrode patterns arranged in parallel.

15. The LCD panel of claim 14, wherein the second electrode layer comprises a plurality of second stripe electrode patterns arranged in parallel, and a direction in which the second stripe electrode patterns are arranged is substantially perpendicular to a direction in which the first stripe electrode patterns are arranged.

16. The LCD panel of claim 13, further comprising a substrate, wherein the first electrode layer is disposed on the substrate, the color filter layer comprises a plurality of color filter films and a black matrix defining a plurality of sub-pixel areas on the substrate, and each of the color filter films is located within one of the sub-pixel areas.

17. The LCD panel of claim 16, wherein an overlapping area between the first electrode layer and the second electrode layer covers two or more sub-pixel areas.

18. The LCD panel of claim 16, wherein the color filter films comprise red filter films, green filter films or blue filter films.

19. The LCD panel of claim 13, further comprising a passivation layer disposed between the second electrode layer and the second dielectric layer.

20. The LCD panel of claim 19, further comprising a grounding conductive layer disposed between the passivation layer and the second dielectric layer.

21. The LCD panel of claim 13, further comprising a planar layer disposed on a surface of the color filter layer, wherein said surface is away from the first electrode layer.

22. The LCD panel of claim 13, wherein a material of the first electrode layer, the second electrode layer, and the third electrode layer comprises a transparent conductive material composed of ITO or IZO.

23. The LCD panel of claim 13, wherein the second substrate comprises an active device array structure.

24. The LCD panel of claim 13, wherein the first dielectric layer comprises a glass substrate or a plastic substrate.

25. The LCD panel of claim 13, further comprising an optical lens disposed on a surface of the first electrode layer, wherein the surface is away from the first dielectric layer.