TOUCH INPUT DEVICE

• US 20110242011A1
• Filed: 07/14/2010
• Published: 10/06/2011
• Est. Priority Date: 03/30/2010
• Status: Abandoned Application

• Current Assignee: Chunghwa Picture Tubes Limited (Tatung Co., Ltd.)
• Original Assignee: Chunghwa Picture Tubes Limited (Tatung Co., Ltd.)
• Inventors: Hu, Cheng-Chung, Wu, Chun-Wei, Ho, Yu-Ping, Jhuo, Long-Cai, Lin, Jyun-Cheng
• Application Number:
  US12/836,387
• Publication Number:
  US 20110242011A1
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes

Abstract

A touch input device includes a substrate and a plurality of touch-sensing strips. The substrate has a flat surface. The touch-sensing strips are all disposed side by side on the flat surface. Each touch-sensing strip includes a plurality of sensing electrodes electrically connected to one another in series. Each sensing electrode has a top surface, and the areas of the top surfaces in at least two sensing electrodes of each touch-sensing strip are not equal to each other.

Claims

1. A touch input device, comprising:

a substrate, having a flat surface; and

a plurality of touch-sensing strips, all disposed side by side on the flat surface, each touch-sensing strip including a plurality of sensing electrodes electrically connected to one another in series, wherein each sensing electrode has a top surface and an areas of the top surfaces in at least two sensing electrodes of each touch-sensing strip are not equal to each other.

2. The touch input device as claimed in claim 1, wherein a total area of any two top surfaces of each touch-sensing strip is not equal to a total area of other two top surfaces of the same touch-sensing strip.

3. The touch input device as claimed in claim 1, wherein the touch-sensing strips all extend in a direction and the sensing electrodes of each sensing strip are arranged in a row in the direction.

4. The touch input device as claimed in claim 1, wherein the flat surface has a first side edge and a second side edge opposite to each other;

the touch-sensing strips extend from the first side edge towards the second side edge, and the areas of the top surfaces in one of the touch-sensing strips increase by degrees from the first side edge to the second side edge.

5. The touch input device as claimed in claim 4, wherein the areas of the top surfaces in another of the touch-sensing strips decrease by degrees from the first side edge to the second side edge.

6. The touch input device as claimed in claim 1, wherein the sensing electrodes are at least one metal film or at least one transparent conductive film.

7. The touch input device as claimed in claim 6, wherein a material of the transparent conductive film includes indium tin oxide or indium zinc oxide.

8. The touch input device as claimed in claim 1, wherein the substrate and the touch-sensing strips are integrated into a printed circuit board.

9. The touch input device as claimed in claim 1, wherein each touch-sensing strip further includes at least one connecting line electrically connected between two adjacent sensing electrodes.

10. The touch input device as claimed in claim 9, wherein the connecting line is a metal wire or a transparent conductive wire.

11. The touch input device as claimed in claim 10, wherein a material of the transparent conductive wire includes indium tin oxide or indium zinc oxide.

12. The touch input device as claimed in claim 1, further comprising a plurality of peripheral traces all disposed on the flat surface and respectively electrically connected to the touch-sensing strips.

13. The touch input device as claimed in claim 12, further comprising a chip disposed on the flat surface, wherein the peripheral traces are electrically connected between the chip and the touch-sensing strips.

14. The touch input device as claimed in claim 13, wherein the peripheral traces are disposed between the chip and the touch-sensing strips.

15. The touch input device as claimed in claim 1, further comprising a protective layer disposed on the flat surface and covering the touch-sensing strips.

16. The touch input device as claimed in claim 15, wherein the protective layer is transparent.

17. The touch input device as claimed in claim 1, wherein the substrate is a transparent plate.

18. The touch input device as claimed in claim 17, wherein a material of the transparent plate includes glass.