Touch panel and operation method thereof

Patent metadata

Field	Value
Publication number	US-9495043-B2
Application number	US-201213409049-A
Country	US
Kind code	B2
Filing date	Feb 29, 2012
Priority date	Jul 28, 2011
Publication date	Nov 15, 2016
Grant date	Nov 15, 2016

Abstract

The present invention relates to a touch panel. The touch panel includes a substrate, a plurality of first traces, a plurality of second traces, and a plurality of sensing pads. The first traces are disposed on the substrate and are parallel to each other along a first direction. The second traces are disposed on the substrate and are parallel to each other along a second direction. The first traces and the second traces interlace with each other to form a plurality of sensing pad areas. Each sensing pad is disposed in each sensing pad area, and is electrically connected to each first trace and each second trace. The present invention further provides a method of operating the same. In the present invention, the thickness of the touch panel is decreased, and the material for the electrodes is economized. Consequently, the costs of the touch panel can be reduced.

First claim

What is claimed is:

1. A touch panel, comprising:
a substrate, wherein the substrate has a first surface and a second surface opposite to the first surface;
a plurality of first traces parallel to each other along a first direction;
a plurality of second traces parallel to each other along a second direction, wherein the first traces and the second traces are disposed on the first surface of the substrate; and
a plurality of sensing pads disposed on the second surface of the substrate, wherein each sensing pad is a single layer electrode, and wherein each sensing pad is electrically connected to one of the first traces through a first conducting path and electrically connected to one of the second traces through a second conducting path, wherein the first conducting path and the second conducting path are located under the corresponding sensing pad;
wherein the first conducting path comprises a first auxiliary trace and a first contact hole and the second conducting path comprises a second contact hole, wherein the first contact hole and the second contact hole are covered by the corresponding sensing pad, the first auxiliary trace is connected between the first contact hole and the corresponding first trace.

2. The touch panel according to claim 1 , further comprising a driving chip connected to the first traces and the second traces, wherein the driving chip supplies a sensing signal to the first traces in a first time mode, and wherein the driving chip supplies the sensing signal to the second traces in a second time mode.

3. The touch panel according to claim 1 , further comprising a plurality of insulation mounds disposed at each intersection of the first traces and the second traces.

4. The touch panel according to claim 1 , wherein the second conducting path further comprises a second auxiliary trace, and the second auxiliary trace is connected between the second contact hole and the corresponding second trace.

5. A touch panel, comprising:
a substrate, wherein the substrate has a first surface and a second surface opposite to the first surface;
a plurality of first traces and a plurality of second traces, wherein the first traces are disposed on the first surface of the substrate and parallel to each other along a first direction and the second traces are disposed on the second surface of the substrate and parallel to each other along a second direction; and
a plurality of sensing pads disposed on the first surface of the substrate, wherein each sensing pad is a single layer electrode, and each sensing pad is electrically connected to a corresponding one of the first traces through a first conducting path, and wherein each sensing pad is electrically connected to a corresponding one of the second traces through a second conducting path;
wherein the first conducting path comprises a first auxiliary trace and the second conducting path comprises a contact hole, wherein the contact hole is covered by the corresponding sensing pad.

6. The touch panel according to claim 5 , further comprising a driving chip connected to the first traces and the second traces, wherein the driving chip supplies a sensing signal to the first traces in a first time mode, and wherein the driving chip supplies the sensing signal to the second traces in a second time mode.

7. The touch panel according to claim 5 , wherein the second conducting path further comprises a second auxiliary trace, and the second auxiliary trace is connected between the contact hole and the corresponding second trace.

8. The touch panel according to claim 7 , wherein the first auxiliary trace is a branch portion extending from the corresponding sensing pad.

9. The touch panel according to claim 5 , wherein the first auxiliary trace is a branch portion extending from the corresponding sensing pad.

10. A touch panel, comprising:
a substrate, wherein the substrate has a first surface and a second surface opposite to the first surface;
a plurality of first traces and a plurality of second traces, wherein the first traces are disposed on the first surface of the substrate and parallel to each other along a first direction and the second traces are disposed on the second surface of the substrate and parallel to each other along a second direction; and
a plurality of sensing pads disposed on the first surface of the substrate, wherein each sensing pad is a single layer electrode, and each sensing pad is electrically connected to a corresponding one of the first traces through a first conducting path, and wherein each sensing pad is electrically connected to a corresponding one of the second traces through a second conducting path;
wherein each sensing pad makes contact with the corresponding first trace to form the first conducting path, and wherein the second conducting path comprises a contact hole, and wherein the contact hole is covered by the corresponding sensing pad.

11. The touch panel according to claim 10 , wherein the second conducting path further comprises an auxiliary trace, and the auxiliary trace is connected between the contact hole and the corresponding second trace.

12. The touch panel according to claim 1 , further comprising an insulation layer disposed on the substrate and located between each two adjacent sensing pads, and a top surface of each sensing pad is exposed from the insulation layer.

13. The touch panel according to claim 12 , wherein the insulation layer comprises at least one of TiO 2 or Zro 2 .

14. The touch panel according to claim 5 , further comprising an insulation layer disposed on the substrate and located between each two adjacent sensing pads, and a top surface of each sensing pad is exposed from the insulation layer.

15. The touch panel according to claim 14 , wherein the insulation layer comprises at least one of TiO 2 or Zro 2 .

16. A touch panel, comprising:
a substrate, wherein the substrate has a first surface and a second surface opposite to the first surface;
a plurality of first traces and a plurality of second traces, wherein the first traces are disposed on the first surface of the substrate and parallel to each other along a first direction and the second traces are disposed on the second surface of the substrate and parallel to each other along a second direction; and
a plurality of sensing pads disposed on the first surface of the substrate, wherein each sensing pad is a single layer electrode, and each sensing pad is electrically connected to a corresponding one of the first traces through a first conducting path, and wherein each sensing pad is electrically connected to a corresponding one of the second traces through a second conducting path;
wherein the second conducting path is covered by the corresponding sensing pad.

17. The touch panel according to claim 10 , further comprising an insulation layer disposed on the substrate and located between each two adjacent sensing pads, and a top surface of each sensing pad is exposed from the insulation layer.

18. The touch panel according to claim 17 , wherein the insulation layer comprises at least one of TiO 2 or Zro 2 .

19. The touch panel according to claim 16 , further comprising an insulation layer disposed on the substrate and located between each two adjacent sensing pads, and a top surface of each sensing pad is exposed from the insulation layer.

20. The touch panel according to claim 19 , wherein the insulation layer comprises at least one of TiO 2 or Zro 2 .

Assignees

• Ding Hua
• Yu Silu
• Tpk Touch Solutions Xiamen Inc

Inventors

• Ding Hua
• Yu Silu

Classifications

• G06F3/045 Primary

  using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact · CPC title

• G06F3/044 Primary

  by capacitive means · CPC title

• G06F3/041 Primary

  Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means · CPC title

• G06F3/0446

  using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes · CPC title

• G06F3/0445

  using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer · CPC title