CAPACITIVE TOUCH PANEL, SENSING METHOD THEREOF, TOUCH DEVICE USING THE SAME, AND INPUT APPARATUS

• US 20140210772A1
• Filed: 11/30/2013
• Published: 07/31/2014
• Est. Priority Date: 01/25/2013
• Status: Abandoned Application

• Current Assignee: PixArt Imaging Incorporated
• Original Assignee: PixArt Imaging Incorporated
• Inventors: YANG, KUAN-YI, LIAO, CHI-CHIEH
• Application Number:
  US14/093,449
• Publication Number:
  US 20140210772A1
• Time in Patent Office: Days
• US Class Current: 345/174
• CPC Class Codes: G06F 1/3262 Power saving in digitizer or tablet
• 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

The present disclosure provides a capacitive touch panel, a sensing method thereof, a touch device using the same, and an input apparatus. The capacitive touch panel includes a substrate, a plurality of first scan lines, and a plurality of second scan lines. The first scan lines and the second scan lines are respectively formed on the substrate wherein the first scan lines and the second scan lines are interlaced with each other. The first scan lines and the second scan lines are capacitively coupled to each other forming a plurality of sensing regions. Moreover, any one of the second scan lines can formed a sensing region with one or more first scan lines.

Claims

1. A capacitive touch panel, comprising:

a substrate;

a plurality of first scan lines, formed on the substrate, the first scan lines arranged in parallel along a first axis of the substrate; and

a plurality of second scan lines, formed on the substrate, the second scan lines arranged in parallel along a second axis of the substrate, and the second scan lines interlaced with the first scan lines, wherein the second scan lines are capacitively coupled to the first scan lines forming a plurality of sensing regions;

wherein the ith first scan line is capacitively coupled to the jth second scan line forming the kth sensing region;

the ith first scan line and the i+1th first scan line are simultaneously capacitively coupled to the jth second scan line collectively forming the k+1 th sensing region;

the i+1th first scan line is capacitively coupled to the jth second scan line forming the k+2th sensing region;

wherein, i, j, and k are integers.

2. The capacitive touch panel according to claim 1, wherein the i+1th first scan line and the i+2th second scan line are simultaneously capacitively coupled to the jth second scan line collectively forming the k+2th sensing region.

3. The capacitive touch panel according to claim 1, wherein the ith first scan line comprises of two adjacent conducting wires connected in series or in parallel.

4. The capacitive touch panel according to claim 1, wherein the i+1th first scan line comprises of two adjacent conducting wires connected in series or in parallel.

5. The capacitive touch panel according to claim 1, wherein the ith first scan line crosses the kth sensing region and the k+1th sensing region.

6. The capacitive touch panel according to claim 1, wherein the i+1th first scan line crosses the k+1th sensing region and the k+2th sensing region.

7. The capacitive touch panel according to claim 1, wherein the first scan lines are driving lines while the second scan lines are sensing lines.

8. The capacitive touch panel according to claim 1, wherein the first scan lines are sensing lines while the second scan lines are driving lines.

9. A touch device, comprising:

a capacitive touch panel, comprising;

a substrate;

a plurality of first scan lines, formed on the substrate, the first scan lines arranged in parallel along a first axis of the substrate; and

a plurality of second scan lines, formed on the substrate, the second scan lines arranged in parallel along a second axis of the substrate, and the second scan lines interlaced with the first scan lines, wherein the second scan lines are capacitively coupled to the first scan lines forming a plurality of sensing regions; and

wherein the ith first scan line is capacitively coupled to the jth second scan line forming the kth sensing region;

the ith first scan line and the i+1th first scan line are simultaneously capacitively coupled to the jth second scan line collectively forming the k+1th sensing region;

the i+1th first scan line is capacitively coupled to the jth second scan line forming the k+2th sensing region;

wherein, i, j, and k are integers;

a controller, coupled to the first scan lines and the second scan lines, determining whether any of the sensing regions has been touched based on the scan results of the first scan lines and the second scan lines.

10. The touch device according to claim 9, wherein when the controller only detects change in the capacitance value sensed by the ith first scan line and the jth second scan line, the controller determines that the kth sensing region has been touched;

when the controller simultaneously detects changes in the capacitance values sensed by the ith first scan line, the i+1th first scan line, and the jth second scan line, the controller determines that the k+1th sensing region has been touched;

when the controller only detects change in the capacitance value sensed by the i+1th first scan line and the jth second scan line, the controller determines that the k+2th sensing region has been touched.

13. An input apparatus, which has the touch device according to claim 9.

14. The input apparatus according to claim 13, wherein the input apparatus further comprises of a processing chip, which is coupled to the touch device.

15. The input apparatus according to claim 13, wherein the input apparatus is a keyboard or a scrolling wheel mouse.

11. A capacitive touch panel, comprising:

a substrate;

a first group of scan lines, formed on the substrate, the first group of scan lines comprising a plurality of conducting wires arranged in parallel along a first axis of the substrate;

a second group of scan lines, formed on the substrate, the second group of scan lines comprising a plurality of conducting wires arranged in parallel along the first axis of the substrate; and

a third group of scan lines, formed on the substrate, the third group of scan lines comprising a plurality of conducting wires arranged in parallel along the a second axis of the substrate, the conducting wires in the third group of the scan lines interlaced with the conducting wires in the first and the second groups of scan lines, while electrically isolated from the conducting wires in the first and the second groups of scan lines;

wherein the zth conducting wire of the first group of scan lines is connected in series with the zth conducting wires of the second group of scan lines, and z is an integer.

12. The capacitive touch panel according to claim 11, wherein the first group of scan lines has the same number of conducting wires as the second group of scan lines.

16. A sensing method for a capacitive touch panel, comprising:

scanning a plurality of first scan lines and a plurality of second scan lines interlaced with the first scan lines disposed on a substrate;

determining whether any of a plurality of sensing regions capacitively formed between the first scan lines and the second scan lines has been touched according to the scan results of the first and the second scan lines;

when only detects change in the capacitance value sensed by the ith first scan line and the jth second scan line, determines that the kth sensing region has been touched;

when simultaneously detects changes in the capacitance values sensed by the ith first scan line, the i+1th first scan line, and the jth second scan line, determines that the k+1th sensing region has been touched; and

when only detects change in the capacitance value sensed by the i+1th first scan line and the jth second scan line, determines that the k+2th sensing region has been touched;

wherein i, j, and k are integers.

17. The sensing method according to claim 16, wherein the step of determining whether any of the sensing regions has been touched comprises:

when only detects that the change in the capacitance value sensed by the ith first scan line and the jth second scan line is greater than a predetermined sensing threshold, determines that the kth sensing region has been touched;

when simultaneously detects that the changes in the capacitance values sensed by the ith first scan line, the i+1th first scan line, and the jth second scan line is greater than the predetermined sensing threshold, determines that the k+1th sensing region has been touched; and

when only detects that the change in the capacitance value sensed by the i+1th first scan line and the jth second scan line is greater than the predetermined sensing threshold, determines that the k+2th sensing region has been touched.

18. A sensing method for a capacitive touch panel, comprising:

scanning a plurality of first scan lines and second scan lines being staggeredly arranged on a substrate;

determining whether any of a plurality of sensing regions formed between the first scan lines and the second scan lines has been touched according to the scanning results of the first and the second scan lines;

when only detects change in the capacitance value sensed by the ith first scan line and the jth second scan line, determines that the kth sensing region has been touched;

when simultaneously detects changes in the capacitance values sensed by the ith first scan line, the i+1th first scan line, and the jth second scan line, determines that the k+1th sensing region has been touched;

when only detects change in the capacitance value sensed by the i+1th first scan line and the jth second scan line, determines that the k+2th sensing region has been touched;

when simultaneously detects changes in the capacitance values sensed by the i+1th first scan line, the i+2th first scan line, and the jth second scan line, determines that the k+3th sensing region has been touched; and

when only detects change in the capacitance value sensed by the i+2th first scan line and the jth second scan line, determines that the k+4th sensing region has been touched;

wherein i, j, and k are integers.

19. The sensing method according to claim 18, wherein the step of determining whether the sensing region has been touched comprises:

when only detects that the change in the capacitance value sensed by the ith first scan line and the jth second scan line is greater than a predetermined sensing threshold, determines that the kth sensing region has been touched;

when simultaneously detects that the changes in the capacitance values sensed by the ith first scan line, the i+1th first scan line, and the jth second scan line is greater than the predetermined sensing threshold, determines that the k+1th sensing region has been touched; and

when only detects that the change in the capacitance value sensed by the i+1th first scan line and the jth second scan line is greater than the predetermined sensing threshold, determines that the k+2th sensing region has been touched

when simultaneously detects that the changes in the capacitance values sensed by the i+1th first scan line, the i+2th first scan line, and the jth second scan line is greater than the predetermined sensing threshold, determines that the k+3th sensing region has been touched; and

when only detects that the change in the capacitance value sensed by the i+2th first scan line and the jth second scan line is greater than the predetermined sensing threshold, determines that the k+4th sensing region has been touched.

20. A capacitive touch panel, comprising:

a substrate;

a plurality of first scan lines, formed on the substrate, the first scan lines arranged in parallel along a first axis of the substrate; and

a plurality of second scan lines, formed on the substrate, the second scan lines arranged in parallel along a second axis of the substrate, and the second scan lines interlaced with the first scan lines, wherein the second scan lines are capacitively coupled to the first scan lines forming a plurality of sensing regions;

wherein at least a sensing region covers a plurality of first scan lines.

21. The capacitive touch panel according to claim 20, wherein the ith first scan line is in adjacent to the i+1th first scan line of the plurality of first scan lines covered by the sensing region.

22. The capacitive touch panel according to claim 21, wherein the ith first scan line and the i+1th first scan line collectively forming the sensing region with the jth second scan line.

23. The capacitive touch panel according to claim 21, wherein at least one of the ith first scan line and the i+1th first scan line comprises of two adjacent conducting wires connected in series or in parallel.

24. The capacitive touch panel according to claim 20, wherein the first scan lines are driving lines while the second scan lines are sensing lines.

25. The capacitive touch panel according to claim 20, wherein the first scan lines are sensing lines while the second scan lines are driving lines.