Projected Capacitive Touch Panel

• US 20110141055A1
• Filed: 05/24/2010
• Published: 06/16/2011
• Est. Priority Date: 12/11/2009
• Status: Abandoned Application

• Current Assignee: Minlead, Ltd.
• Original Assignee: Minlead, Ltd.
• Inventors: Hsu, Jane
• Application Number:
  US12/785,686
• Publication Number:
  US 20110141055A1
• Time in Patent Office: Days
• US Class Current: 345/174
• CPC Class Codes: G06F 2203/04107 Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
• 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
• CPC Class Codes: G06F 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes

Abstract

A projected capacitive touch panel has a lower substrate, an upper substrate and an insulating adhesive layer. The lower substrate has a first-axial conductive area. The first-axial conductive area has multiple conductive strips arranged in parallel in a first axis. The upper substrate has a second-axial conductive area. The second-axial conductive area has multiple conductive strips arranged in parallel in a second axis different from the first axis. The insulating adhesive layer formed between the lower substrate and the upper substrate to adhere the lower substrate and the upper substrate. Two substrates respectively have conductive areas with different axes, so avoid formation of apexes and keep the substrates flat. Therefore, incident light of the projected capacitive touch panel is able to reflect evenly and avoid interference. The projected capacitive touch panel has stable quality and saves costs because no damage occurs during transportation.

Claims

1. A projected capacitive touch panel comprising:

a lower substrate having

an upper surface;

a lower surface; and

a first-axial conductive area formed on the upper surface of the lower substrate and having multiple conductive strips arranged in a first axis and in parallel and each conductive strip having

multiple dots; and

multiple connecting wires and each formed between two dots and connecting the dots;

an anti-electromagnetic interference (EMI) layer formed on the lower surface of the lower substrate;

an upper substrate having

an upper surface;

a lower surface;

a second-axial conductive area formed on the lower surface of the upper substrate and having multiple conductive strips arranged in a second axis different from the first axis and in parallel and each conductive strip having

multiple dots located on the upper substrate corresponding to locations without the first-axial conductive area; and

multiple connecting wires and each formed between two dots and connecting the dots; and

an insulating adhesive layer formed between the lower substrate and the upper substrate to adhere the lower substrate and the upper substrate.

2. The projected capacitive touch panel as claimed in claim 1, wherein

the lower substrate further has multiple conductive wires;

and each conductive strip of the lower substrate further has

two ends; and

one port formed on one of the ends of the conductive strip and respectively connecting the conductive wires; and

the upper substrate further has multiple conductive wires; and

each conductive strip of the upper substrate further has

two ends; and

one port formed on one of the ends of the conductive strip and respectively connecting the conductive wires.

3. The projected capacitive touch panel as claimed in claim 2, wherein

each conductive wire of the lower substrate is made of conductive material;

and

each conductive wire of the upper substrate is made of conductive material.

4. The projected capacitive touch panel as claimed in claim 3, wherein

each conductive wire of the lower substrate is made of silver;

and

each conductive wire of the upper substrate is made of silver.

5. The projected capacitive touch panel as claimed in claim 1, further having a protective layer formed on the upper surface of the upper substrate.

6. The projected capacitive touch panel as claimed in claim 2, further having a protective layer formed on the upper surface of the upper substrate.

7. The projected capacitive touch panel as claimed in claim 3, further having a protective layer formed on the upper surface of the upper substrate.

8. The projected capacitive touch panel as claimed in claim 4, further having a protective layer formed on the upper surface of the upper substrate.

9. The projected capacitive touch panel as claimed in claim 1, wherein the anti-EMI layer is made of indium tin oxide (ITO).

10. The projected capacitive touch panel as claimed in claim 2, wherein the anti-EMI layer is made of ITO.

11. The projected capacitive touch panel as claimed in claim 3, wherein the anti-EMI layer is made of ITO.

12. The projected capacitive touch panel as claimed in claim 4, wherein the anti-EMI layer is made of ITO.

13. The projected capacitive touch panel as claimed in claim 8, wherein the anti-EMI layer is made of ITO.

14. The projected capacitive touch panel as claimed in claim 1, wherein

each dot and each connecting wire of the lower substrate is made of ITO;

and

each dot and each connecting wire of the upper substrate is made of ITO.

15. The projected capacitive touch panel as claimed in claim 2, wherein

each dot and each connecting wire of the lower substrate is made of ITO;

and

each dot and each connecting wire of the upper substrate is made of ITO.

16. The projected capacitive touch panel as claimed in claim 3, wherein

each dot and each connecting wire of the lower substrate is made of ITO;

and

each dot and each connecting wire of the upper substrate is made of ITO.

17. The projected capacitive touch panel as claimed in claim 4, wherein

each dot and each connecting wire of the lower substrate is made of ITO;

and

each dot and each connecting wire of the upper substrate is made of ITO.

18. The projected capacitive touch panel as claimed in claim 8, wherein

each dot and each connecting wire of the lower substrate is made of ITO;

and

each dot and each connecting wire of the upper substrate is made of ITO.

19. The projected capacitive touch panel as claimed in claim 13, wherein

each dot and each connecting wire of the lower substrate is made of ITO;

and

each dot and each connecting wire of the upper substrate is made of ITO.