Transparent capacitive touch panel and manufacturing method thereof

• US 8,294,677 B2
• Filed: 12/23/2008
• Issued: 10/23/2012
• Est. Priority Date: 12/24/2007
• Status: Active Grant

• Current Assignee: TPK Holding Co., Ltd.
• Original Assignee: Wintek Corporation
• Inventors: Wu, Jason, Weng, Ruey-Shing, Lai, Chih-Chang, Hung, Yen-Chung
• Primary Examiner(s): Giesy, Adam R
• Application Number:
  US12/342,513
• Publication Number:
  US 20090160817A1
• Time in Patent Office: 1,400 Days
• Field of Search: 345/173, 345/174, 178/18.01, 178/18.03, 178/18.05, 178/18.06, 178/18.07
• US Class Current: 345/173
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• 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

Abstract

A transparent capacitive touch panel comprising a transparent substrate, a transparent cover lens and a transparent adhesive layer is provided, wherein a first transparent electrode layer and a second transparent electrode layer are disposed on the transparent cover lens and the transparent substrate respectively. The transparent adhesive layer is used to bind the first transparent electrode layer and second transparent electrode layer in order to combine the transparent cover lens and the transparent substrate disposed in parallel. Thereby, the manufacturing process of the transparent capacitive touch panel is simplified, and the manufacturing cost of the same is lowered.

Claims

1. A transparent capacitive touch panel, comprising:

a transparent cover lens for assembly with a display panel;

a decoration layer disposed on a surface of a first side of the transparent cover lens and patterned with at least one symbol or text;

a first transparent electrode layer, disposed on the first side of the transparent cover lens;

a nongaseous insulating layer, disposed on a surface of the first transparent electrode layer that is different from the other surface whereon the transparent cover lens is disposed; and

a second transparent electrode layer, disposed on a surface of the nongaseous insulating layer that is different from the other surface whereon the first transparent electrode layer is disposed.

2. The transparent capacitive touch panel as recited in claim 1, further comprising an anti-reflection layer, disposed on a surface of the transparent cover lens that is different from the other surface whereon the first transparent electrode layer is disposed.

3. The transparent capacitive touch panel as recited in claim 1, wherein the first transparent electrode layer and the second transparent electrode layer comprises indium-tin oxide or indium-zinc oxide.

4. The transparent capacitive touch panel as recited in claim 1, wherein the transparent cover lens comprises plastic or glass.

5. The transparent capacitive touch panel as recited in claim 1, wherein the decoration layer is disposed between the transparent cover lens and the first transparent electrode layer.

6. The transparent capacitive touch panel as recited in claim 5, further comprising a planarization layer, disposed between the decoration layer and the first transparent electrode layer.

7. The transparent capacitive touch panel as recited in claim 1, wherein the decoration layer is monochromatic.

8. The transparent capacitive touch panel as recited in claim 1, wherein the decoration layer is multi-chromatic.

9. The transparent capacitive touch panel as recited in claim 1, wherein the decoration layer comprises an insulating material.

10. The transparent capacitive touch panel as recited in claim 1, wherein the decoration layer comprises a conductive material.

11. The transparent capacitive touch panel as recited in claim 1, further comprising a transparent substrate disposed in parallel with the transparent cover lens so that the second transparent electrode layer is disposed on a surface of the transparent substrate facing a surface of the first transparent electrode layer;

wherein the nongaseous insulating layer binds the first transparent electrode layer and the second transparent electrode layer in order to combine the transparent cover lens and the transparent substrate.

12. The transparent capacitive touch panel as recited in claim 11, wherein the nongaseous insulating layer is a transparent adhesive layer.

13. The transparent capacitive touch panel as recited in claim 12, wherein the transparent adhesive layer is a double-sided adhesive tape or a liquid-phase transparent adhesive.

14. The transparent capacitive touch panel as recited in claim 11, wherein the transparent substrate comprises glass or tempered glass.

15. The transparent capacitive touch panel as recited in claim 11, wherein the transparent substrate is a color filter substrate.