Capacitive touch panel, manufacturing method and scanning method

• US 9,116,580 B2
• Filed: 03/10/2011
• Issued: 08/25/2015
• Est. Priority Date: 05/04/2010
• 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: Ho, Kwan-Sin, Liu, Yong, Huang, Pingping
• Primary Examiner(s): Patel, Kumar
• Assistant Examiner(s): LAM, VINH TANG
• Application Number:
  US13/044,565
• Publication Number:
  US 20110273398A1
• Time in Patent Office: 1,629 Days
• Field of Search: 345173-174, 178/18.06
• US Class Current: 1/1
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• 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
• CPC Class Codes: Y10T 29/43 Electric condenser making

Abstract

The present invention discloses a capacitive touch panel, comprises a touch sensing pattern form on a substrate, which could generate a sensing signals in response to a touch on the capacitive touch panel; a plurality of first signal lines and a second signal line for conducting the sensing signals; the touch sensing pattern comprises a plurality of first conductive assemblies arranged in a first direction, a first end of each first conductive assembly respectively connects to a corresponding first signal line; the second signal line connects the second ends of all of the first conductive assemblies together.

Claims

1. A scanning method comprising:

providing a plurality of first conductive assemblies arranged in a first direction;

sequentially scanning each of the first conductive assemblies through a corresponding first signal line connected to a first end of each first conductive assembly, meanwhile providing a constant signal source with a common driving signal through a second signal line to a plurality of second ends of all the first conductive assemblies, wherein the step of sequentially scanning each of the first conductive assemblies further comprises;

sequentially providing a scanning signal to each of the first conductive assemblies through the corresponding first signal line, and wherein the scanning signal has a same frequency, a same potential and a same phase with the common driving signal;

wherein when scanning one of the first conductive assemblies, the scanning signal is input to the first end of the scanned first conductive assembly to charge and then discharge repeatedly for detecting the capacitance variation thereof, and the second end of the scanned first conductive assembly is connected to the constant signal source through the second signal line while the first ends and the second ends of other non-scanned first conductive assemblies are connected to the constant signal source; and

generating touch sensing signals while the capacitance variation of the scanned first conductive assembly is detected.

2. The scanning method of claim 1, further comprising a step of providing a controller configured to process the touch sensing signals of the first conductive assemblies.

3. The scanning method of claim 2, further comprising arranging the plurality of first conductive assemblies evenly in the first direction.

4. The scanning method of claim 1, wherein the first conductive assemblies, the first signal line and the second signal line are made of a transparent conductive material.

5. A scanning method comprising:

providing a controller with a plurality of first signal lines, a plurality of second signal lines and a first common signal line;

providing a plurality of first conductive assemblies arranged in a first direction and a plurality of second conductive assemblies arranged in a second direction, wherein a first end of each of the first conductive assemblies is connected to the corresponding first signal line, a second end of each of the first conductive assemblies is connected to the first common signal line, and each of the second conductive assemblies is connected to the corresponding second signal line;

providing a common driving signal to the second ends of the first conductive assemblies through the first common signal line;

scanning each of the first conductive assemblies sequentially through the first signal lines for detecting at least one capacitance variation on the first conductive assemblies, wherein the second conductive assemblies are grounded, wherein the step of sequentially scanning each of the first conductive assemblies further comprises;

sequentially providing a scanning signal to each of the first conductive assemblies using the controller through the first signal lines, and wherein the scanning signal has the same frequency, the same potential and the same phase with the common driving signal;

scanning each of the second conductive assemblies sequentially through the second signal lines for detecting at least one capacitance variation on the second conductive assemblies, wherein the first conductive assemblies are grounded; and

generating touch sensing signals while the capacitance variation of the scanned first conductive assembly and the capacitance variation of the scanned second conductive assembly are detected.

6. The scanning method of claim 5, wherein the step of sequentially scanning each of the first conductive assemblies further comprises:

inputting the scanning signal to the first end of the first conductive assembly subjected to scanning to repeatedly charge and discharge the first conductive assembly subjected to scanning, upon scanning one of the first conductive assembly, and

inputting the common driving signal to the second end of the scanning first conductive assembly to charge and discharge the scanning first conductive assembly.

7. The scanning method of claim 5, wherein the controller further has a second common signal line, and wherein a first end of each of the second conductive assemblies is connected to the corresponding second signal line, and wherein a second end of each of the second conductive assemblies is connected to the second common signal line.

8. The scanning method of claim 7, wherein the step of sequentially scanning each of the second conductive assemblies further comprises:

inputting the common driving signal to the second ends of the second conductive assemblies through the second common signal line.

9. The scanning method of claim 8, wherein the step of sequentially scanning each of the second conductive assemblies further comprises:

sequentially providing a scanning signal to each of the second conductive assemblies using the controller through the second signal lines, and wherein the scanning signal has the same frequency, the same potential and the same phase with the common driving signal.

10. The scanning method of claim 9, wherein the step of sequentially scanning each of the second conductive assemblies further comprises:

inputting the scanning signal to the first end of the second conductive assembly subjected to scanning to charge and discharge the second conductive assembly subjected to scanning, upon scanning one of the second conductive assemblies, and

inputting the common driving signal to the second end of the scanning second conductive assembly to charge and discharge the scanning second conductive assembly.

11. The scanning method of claim 5, further comprising arranging the first conductive assemblies parallelly in the first direction, and arranging the second conductive assemblies parallelly in the second direction.

12. The scanning method of claim 5, further comprising arranging the first conductive assemblies and the second conductive assemblies as a matrix structure.

13. The scanning method of claim 5, wherein in the step of providing a plurality of first conductive assemblies and a plurality of second conductive assemblies, each of the first conductive assemblies comprises a plurality of first conductive cells and each of the second conductive assemblies comprises a plurality of second conductive cells, wherein the adjacent first conductive cells are connected by a first conductive line and the adjacent second conductive cells are connected by a second conductive line, wherein an insulator is disposed between the first conductive line and the corresponding second conductive line.

14. The scanning method of claim 13, wherein the first conductive cells and the second conductive cells are made of a transparent conductive material, and the insulator is made of a transparent insulating material.

15. A scanning method comprising:

providing a controller with a plurality of signal lines and a common signal line;

providing a plurality of first conductive assemblies arranged in a first direction, wherein a first end of each of the first conductive assemblies is connected to the corresponding signal line, and a second end of each of the first conductive assemblies connects to the common signal line;

providing a common driving signal to the second ends of the first conductive assemblies through the common signal line;

scanning each of the first conductive assemblies sequentially through the signal lines for detecting at least one capacitance variation on the first conductive assemblies, wherein the step of sequentially scanning each of the first conductive assemblies further comprises;

sequentially providing a scanning signal to each of the first conductive assemblies through the signal lines using the controller, and wherein the scanning signal has the same frequency, the same potential and the same phase with the common driving signal; and

generating touch sensing signals while the capacitance variation of the scanned first conductive assembly is detected.

16. The scanning method of claim 15, wherein the step of sequentially scanning each of the first conductive assemblies further comprises:

inputting the scanning signal to the first end of the first conductive assembly subjected to scanning to charge and discharge the first conductive assembly subjected to scanning upon scanning one of the first conductive assemblies, and

inputting the common driving signal to the second end of the scanning first conductive assembly subjected to scanning to charge and discharge the first conductive assembly subjected to scanning.

17. The scanning method of claim 15, further comprising arranging the plurality of first conductive assemblies evenly in the first direction.

18. The scanning method of claim 15, wherein the first conductive assemblies, the first signal line and the second signal line are made of a transparent conductive material.