CIRCUIT STRUCTURE FOR A CAPACITIVE TOUCH PANEL

• US 20120012450A1
• Filed: 07/02/2009
• Published: 01/19/2012
• Est. Priority Date: 03/24/2009
• Status: Active Grant

• Current Assignee: TPK Touch Solutions (Xiamen) Inc. (TPK Holding Co., Ltd.)
• Original Assignee: TPK Touch Solutions (Xiamen) Inc. (TPK Holding Co., Ltd.)
• Inventors: Liu, Chen-Yu, Wang, Ching-Yi
• Granted Patent: US 9,733,766 B2
• Time in Patent Office: Days
• US Class Current: 200/600
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• 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 circuit structure for capacitive touch panel is disclosed herein. The circuit structure for capacitive touch panel includes a plurality of metal leads and a plurality of electrode sensing blocks. Those electrode sensing blocks are isolated to each other and electrically connected to the metal leads. The electrode sensing blocks will output a plurality of capacitive signals in accordance with a plurality of touch positions. According to the electrode pattern structure described above, the impedance of the electrode structure can be decreased and the efficiency of the signal transmission can be improved and the sensibility of the touch panel can be increased.

Claims

1. A circuit structure for capacitive touch panel, comprising:

at least one sensing electrode group, and said sensing electrode group includes;

at least one metal lead; and

a plurality of electrode sensing blocks, and said electrode sensing blocks are electrically isolated to each other respectively and electrically connected to said metal leads, and output a capacitive signal in accordance with at least one touch position.

2. The circuit structure of claim 1, further comprising a plurality of intervals, and each of said intervals is disposed between two of said electrode sensing blocks and includes an equal distance.

3. The circuit structure of claim 2, wherein the area in each of said electrode sensing block is the same and said circuit structure outputs said capacitive signal in accordance with the area of said electrode sensing block covered by said touch position.

4. The circuit structure of claim 2, wherein the area of each of said electrode sensing block is different and said circuit structure outputs said capacitive signal in accordance with the area of said electrode sensing block covered by said touch position.

5. The circuit structure of claim 1, further comprising a plurality of intervals, and each of said intervals is disposed between two of said electrode sensing blocks and includes a different distance.

6. The circuit structure of claim 5, wherein the area of each of said electrode sensing block is the same and said circuit structure outputs said capacitive signal in accordance with the area of said electrode sensing block covered by said touch position.

7. The circuit structure of claim 5, wherein the area of each of said electrode sensing blocks is different and said circuit structure outputs said capacitive signal in accordance with the area of said electrode sensing block covered by said touch position.

8. The circuit structure of claim 7, wherein the areas of said electrode sensing blocks in said sensing electrode group are become smaller and smaller from left to right and the intervals are become larger and larger from left to right.

9. The circuit structure of claim 1, further comprising a plurality of intervals, and each of said intervals is disposed between two of said electrode sensing blocks and includes an equal distance and said circuit structure outputs said capacitive signal in accordance with the area of said electrode sensing block covered by said touch position.

10. The circuit structure of claim 1, further comprising a plurality of intervals, and each of said intervals is disposed between two of said electrode sensing blocks and includes a different distance and said circuit structure outputs said capacitive signal in accordance with the area of said electrode sensing block covered by said touch position.

11. The circuit structure of claim 1, wherein said electrode sensing blocks are made of Indium Tim Oxide (ITO).

12. The circuit structure of claim 1, wherein said metal leads include a plurality of first metal leads and a plurality of second metal leads, and each of said first metal leads is used to electrically connect said capacitive touch panel and said electrode sensing block, and each of said second metal leads is used to electrically connect with each of said electrode sensing blocks.

13. The circuit structure of claim 1, wherein said electrode sensing blocks and said metal lead are stacked to each other.