Touch Panel Structure

• US 20100164881A1
• Filed: 05/18/2009
• Published: 07/01/2010
• Est. Priority Date: 12/25/2008
• Status: Abandoned Application

• Current Assignee: AU Optronics Corporation
• Original Assignee: AU Optronics Corporation
• Inventors: Wijaya, Martinus Tony, Kuo, Han-Ping
• Application Number:
  US12/467,577
• Publication Number:
  US 20100164881A1
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G02F 1/133512 Light shielding layers, e.g. black matrix G02F1/136209 takes precedence
• CPC Class Codes: G06F 3/044 by capacitive means

Abstract

A touch panel structure is provided. The touch panel structure comprises a cover glass, a first transparent electrode and a light shielding element. The cover glass has a touch surface, a sensing surface corresponding to the touch surface, wherein the sensing surface is defined with a center area and a peripheral area surrounding the center area thereon. The first transparent electrode is formed on the cover glass, comes into contact with the sensing surface and is disposed in the center area correspondingly. The light shielding element is formed on the cover glass, comes into contact with the sensing surface and is disposed in the peripheral area correspondingly.

Claims

1. A touch panel structure, comprising:

a cover glass, having a touch surface and a sensing surface corresponding to the touch surface, the sensing surface having a center area and a peripheral area surrounding the center area defined thereon;

a first transparent electrode, disposed on the cover glass, contacting the sensing surface and disposed correspondingly inside the center area; and

a light shielding element, disposed on the cover glass, contacting the sensing surface and disposed correspondingly inside the peripheral area.

2. The touch panel structure as claimed in claim 1, wherein the first transparent electrode has a thickness between 1 micrometer and 2 micrometers.

3. The touch panel structure as claimed in claim 1, wherein the light shielding element has a thickness between 1 micrometer and 2 micrometers.

4. The touch panel structure as claimed in claim 1, wherein at least one side of the light shielding element is aligned with a side of the cover glass.

5. The touch panel structure as claimed in claim 1, wherein the sensing surface further has a groove, and the light shielding element at least fills up the groove.

6. The touch panel structure as claimed in claim 5, wherein the groove has a depth between 5 micrometers and 15 micrometers.

7. The touch panel structure as claimed in claim 5, wherein the light shielding element has a thickness between 6 micrometers and 17 micrometers.

8. The touch panel structure as claimed in claim 1, wherein a material of the light shielding element is made of high-temperature endurable ceramic pigment.

9. The touch panel structure as claimed in claim 1, wherein the light shielding element has a heat-resistant temperature between 200°

C. and 800°

C.

10. The touch panel structure as claimed in claim 1, further comprising a second transparent electrode, disposed on the cover glass and correspondingly to the peripheral area.

11. The touch panel structure as claimed in claim 10, wherein the second transparent electrode has a thickness between 1 micrometer and 2 micrometers.

12. The touch panel structure as claimed in claim 10, wherein the second transparent electrode at least covers one part of the light shielding element.

13. The touch panel structure as claimed in claim 10, wherein the second transparent electrode contacts a surface of the light shielding element.

14. The touch panel structure as claimed in claim 10, wherein the light shielding element is disposed between the cover glass and the second transparent electrode.

15. The touch panel structure as claimed in claim 10, wherein at least one side of the light shielding element is aligned with a side of the second transparent electrode.

16. The touch panel structure as claimed in claim 10, further comprising an adhesive protecting layer, disposed on the cover glass and contacting the sensing surface, the surface of the first transparent electrode and one of the surface of the light shielding element and the surface of the second transparent electrode.

17. The touch panel structure as claimed in claim 16, further comprising a color filter substrate and an active-element array substrate both disposed correspondingly to the adhesive protecting layer.

18. The touch panel structure as claimed in claim 17, further comprising a top polarizing layer, disposed between the adhesive protecting layer and the color filter substrate.

19. The touch panel structure as claimed in claim 18, further comprising an adhesion layer, disposed between the adhesive protecting layer and the top polarizing layer.

20. The touch panel structure as claimed in claim 17, further comprising a bottom polarizing layer, disposed on the surface of the active-element array substrate.