Touch panel

• US 9,547,401 B2
• Filed: 02/10/2015
• Issued: 01/17/2017
• Est. Priority Date: 04/02/2014
• Status: Active Grant

• Current Assignee: TPK Glass Solutions (Xiamen), Inc. (TPK Holding Co., Ltd.)
• Original Assignee: Tpk Touch Systems (Xiamen) Inc. (TPK Holding Co., Ltd.)
• Inventors: Chang, Chen-Hsin, Zhong, Bin, Wu, Che-I, Wang, Fuding, Chen, Lixian, Ke, Yongbin
• Primary Examiner(s): Nguyen, Kevin M
• Application Number:
  US14/617,951
• Publication Number:
  US 20150286315A1
• Time in Patent Office: 707 Days
• US Class Current: 1/1
• CPC Class Codes: G06F 1/1626 with a single-body enclosure integrating a flat display, e.g. Personal Digital Assistants [PDAs]
• CPC Class Codes: G06F 2203/04111 Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate
• CPC Class Codes: G06F 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
• 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 touch panel includes a driving layer and a sensing layer. The driving layer has a first top surface and a driving layer edge. The first top surface has at least one first connecting region. The driving layer edge surrounds the first connecting region and there is a first distance between the first connecting region and the driving layer edge. The sensing layer is disposed on the first top surface of the driving layer. The second top surface of sensing layer away from the driving layer has at least one second connecting region. The sensing layer edge of the sensing layer surrounds the second connecting region, and there is a second distance between the sensing layer edge and the at least one second connecting region.

Claims

1. A touch panel, comprising:

a driving layer having a first top surface and a driving layer edge, wherein the first top surface has at least one first connecting region, the driving layer edge surrounds the first connecting region, and there is a first distance between the driving layer edge and the first connecting region, wherein the driving layer has a driving layer hole being adjacent to the first connecting region; and

a sensing layer disposed on the first top surface of the driving layer, wherein a second top surface of the sensing layer away from the driving layer has at least one second connecting region, a sensing layer edge of the sensing layer surrounds the second connecting region, and there is a second distance between the sensing layer edge and the second connecting region, wherein the sensing layer has a sensing layer hole being adjacent to the second connecting region, the sensing layer hole at least partially overlaps the driving layer hole, and the first connecting region is exposed by the sensing layer hole.

2. The touch panel according to claim 1, wherein the number of first connecting regions is two, the number of second connecting regions is one, and the second connecting region does not overlap the two first connecting regions.

3. The touch panel according to claim 2, wherein the second connecting region is disposed between the two first connecting regions.

4. The touch panel according to claim 1, further comprising a flexible printed circuit board, wherein the flexible printed circuit board comprises a main body and an electrically connecting body extending outward from one end of the main body, the main body passes through the driving layer hole and the sensing layer hole, and the electrically connecting body is attached to and electrically connected to the first connecting region and the second connecting region, respectively.

5. The touch panel according to claim 4, wherein the first connecting region has a driving layer electrical contact, the second connecting region has a sensing layer electrical contact, the electrically connecting body has at least one first electrical contact and at least one second electrical contact, the at least one first electrical contact electrically contacts the driving layer electrical contact, and the at least one second electrical contact electrically contacts the sensing layer electrical contact.

6. The touch panel according to claim 1, further comprising a cover plate disposed on the sensing layer, wherein the cover plate has a cover hole, and at least part of the cover hole overlaps the driving layer hole and the sensing layer hole.

7. The touch panel according to claim 6, further comprising:

a flexible printed circuit board, wherein the flexible printed circuit board comprises a main body and an electrically connecting body extending outward from one end of the main body, the main body passes through the driving layer hole and the sensing layer hole, and the electrically connecting body is attached to and electrically connected to the first connecting region and the second connecting region, respectively; and

an adhesive layer, wherein the adhesive layer has two opposite ends, one end of the adhesive layer is adhered to the electrically connecting body of the flexible printed circuit board and the other end of the adhesive layer is adhered to the cover plate.

8. The touch panel according to claim 7, wherein the main body of the flexible printed circuit board has a curved part, an edge of the adhesive layer has a notch corresponding to the curved part.

9. The touch panel according to claim 6, further comprising two optical adhesive layers, wherein one of the optical adhesive layers is disposed between the cover plate and the sensing layer, and the other optical adhesive layer is disposed between the sensing layer and the driving layer.

10. The touch panel according to claim 6, wherein the cover plate comprises a light transmissive region and a decoration region, the decoration region surrounds the light transmissive region, and the first connecting region and the second connecting region are beneath the decoration region.

11. A touch panel, comprising:

a driving layer having a driving layer edge, a first connecting region, and a driving layer hole, wherein the driving layer edge surrounds the first connecting region, there is a first distance between the driving layer edge and the first connecting region, and the driving layer hole is adjacent to the first connecting region; and

a sensing layer disposed over the driving layer, wherein the sensing layer has at least one second connecting region, a sensing layer edge of the sensing layer surrounds the second connecting region, and there is a second distance between the sensing layer edge and the second connecting region, wherein the sensing layer has a sensing layer hole being adjacent to the second connecting region; and

a flexible printed circuit board, wherein the flexible printed circuit board comprises a main body and an electrically connecting body extending outward from one end of the main body, the main body passes through the driving layer hole and the sensing layer hole, and the electrically connecting body is attached to and electrically connected to the first connecting region and the second connecting region, respectively.

12. The touch panel according to claim 11, wherein the sensing layer hole at least partially overlaps the driving layer hole, and the first connecting region is exposed by the sensing layer hole.

13. The touch panel according to claim 11, wherein the number of first connecting regions is two, the number of second connecting regions is one, and the second connecting region does not overlap the two first connecting regions.

14. The touch panel according to claim 13, wherein the second connecting region is disposed between the two first connecting regions.

15. The touch panel according to claim 11, wherein the first connecting region has a driving layer electrical contact, the second connecting region has a sensing layer electrical contact, the electrically connecting body has at least one first electrical contact and at least one second electrical contact, the at least one first electrical contact electrically contacts the driving layer electrical contact, and the at least one second electrical contact electrically contacts the sensing layer electrical contact.

16. The touch panel according to claim 11, further comprising a cover plate disposed on the sensing layer, wherein the cover plate has a cover hole, and at least part of the cover hole overlaps the driving layer hole and the sensing layer hole.

17. The touch panel according to claim 11, further comprising an adhesive layer, wherein the adhesive layer has two opposite ends, one end of the adhesive layer is adhered to the electrically connecting body of the flexible printed circuit board and the other end of the adhesive layer is adhered to the cover plate.

18. The touch panel according to claim 17, wherein the main body of the flexible printed circuit board has a curved part, an edge of the adhesive layer has a notch corresponding to the curved part.

19. The touch panel according to claim 16, further comprising two optical adhesive layers, wherein one of the optical adhesive layers is disposed between the cover plate and the sensing layer, and the other optical adhesive layer is disposed between the sensing layer and the driving layer.

20. The touch panel according to claim 16, wherein the cover plate comprises a light transmissive region and a decoration region, the decoration region surrounds the light transmissive region, and the first connecting region and the second connecting region are beneath the decoration region.