CAPACITIVE TOUCH PANEL

• US 20130201348A1
• Filed: 01/28/2013
• Published: 08/08/2013
• Est. Priority Date: 02/08/2012
• Status: Abandoned Application

• Current Assignee: Wintek China Technology Ltd., Wintek Corporation
• Original Assignee: Wintek China Technology Ltd., Wintek Corporation
• Inventors: Li, Chong-Wei, Liao, Shiao-Hui, Hsu, Ching-Fu, Chang, Heng-Yi, Wu, Yu-Hua
• Application Number:
  US13/751,149
• Publication Number:
  US 20130201348A1
• Time in Patent Office: Days
• US Class Current: 348/174
• 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

Abstract

A capacitive touch panel includes a substrate, a plurality of first axis electrodes, and a plurality of second axis electrodes. Each of the first axis electrodes includes at least one first sensing electrode, and the first sensing electrode has a first electrode pattern region and a second electrode pattern region. Each of the second axis electrodes includes at least one second sensing electrode, and the second sensing electrode has a third electrode pattern region and a fourth electrode pattern region. A pattern density of the first electrode pattern region is higher than a pattern density of the second electrode pattern region, and a pattern density of the third electrode pattern region is higher than a pattern density of the fourth electrode pattern region.

Claims

1. A capacitive touch panel, comprising:

a substrate;

a plurality of first axis electrodes, disposed on the substrate, extending along a first direction, wherein each of the first axis electrodes comprises at least one first sensing electrode, and the first sensing electrode has a first electrode pattern region and a second electrode pattern region; and

a plurality of second axis electrodes, disposed on the substrate, extending along a second direction, wherein each of the second axis electrodes comprises at least one second sensing electrode, and the second sensing electrode has a third electrode pattern region and a fourth electrode pattern region,

wherein a pattern density of each of the first electrode pattern regions is higher than a pattern density of each of the second electrode pattern regions, and a pattern density of each of the third electrode pattern regions is higher than a pattern density of each of the fourth electrode pattern regions.

2. The capacitive touch panel of claim 1, wherein each of the first sensing electrodes and each of the second sensing electrodes comprise a plurality of stripe patterns.

3. The capacitive touch panel of claim 2, wherein a width of each of the stripe patterns in the first electrode pattern region is equal to a width of each of the stripe patterns in the second electrode pattern region, and a spacing between two adjacent stripe patterns in the first electrode pattern region is different from a spacing between two adjacent stripe patterns in the second electrode pattern region.

4. The capacitive touch panel of claim 2, wherein a width of each of the stripe patterns in the third electrode pattern region is equal to a width of each of the stripe patterns in the fourth electrode pattern region, and a spacing between two adjacent stripe patterns in the third electrode pattern region is different from a spacing between two adjacent stripe patterns in the fourth electrode pattern region.

5. The capacitive touch panel of claim 2, wherein a spacing between two adjacent stripe patterns in the first electrode pattern region is equal to a spacing between two adjacent stripe patterns in the second electrode pattern region, and a width of each of the stripe patterns in the first electrode pattern region is different from a width of each of the stripe patterns in the second electrode pattern region.

6. The capacitive touch panel of claim 2, wherein a spacing between two adjacent stripe patterns in the third electrode pattern region is equal to a spacing between two adjacent stripe patterns in the fourth electrode pattern region, and a width of each of the stripe patterns in the third electrode pattern region is different from a width of each of the stripe patterns in the fourth electrode pattern region.

7. The capacitive touch panel of claim 2, wherein a width of each of the stripe patterns in the first electrode pattern region is different from a width of each of the stripe patterns in the second electrode pattern region, and a spacing between two adjacent stripe patterns in the first electrode pattern region is different from a spacing between two adjacent stripe patterns in the second electrode pattern region.

8. The capacitive touch panel of claim 2, wherein a width of each of the stripe patterns in the third electrode pattern region is different from a width of each of the stripe patterns in the fourth electrode pattern region, and a spacing between two adjacent stripe patterns in the third electrode pattern region is different from a spacing between two adjacent stripe patterns in the fourth electrode pattern region.

9. The capacitive touch panel of claim 1, wherein a shape of the first electrode pattern region is symmetric to a shape of the second electrode pattern region of the first sensing electrode, and a shape of the third electrode pattern region is symmetric to a shape of the fourth electrode pattern region of the second sensing electrode.

10. The capacitive touch panel of claim 1, wherein each of the first axis electrodes comprises a plurality of first sensing electrodes disposed along the first direction and a plurality of first connecting electrodes respectively disposed between two adjacent first sensing electrodes to electrically connect the first sensing electrodes of one first axis electrode;

each of the second axis electrodes comprises a plurality of second sensing electrodes disposed along the second direction and a plurality of second connecting electrodes respectively disposed between two adjacent second sensing electrodes to electrically connect the second sensing electrodes of one second axis electrode; and

the capacitive touch panel further comprises an insulating layer disposed on the substrate, wherein the insulating layer at least partially disposed between the first connecting electrode and the second connecting electrode.

11. The capacitive touch panel of claim 10, wherein each of the first electrode pattern regions and each of the second electrode pattern regions are alternately disposed along the first direction, and each of the third electrode pattern regions and each of the fourth electrode pattern regions are alternately disposed along the second direction.

12. The capacitive touch panel of claim 10, wherein each of the first electrode pattern regions and each of the second electrode pattern regions are alternately disposed along the second direction, and each of the third electrode pattern regions and each of the fourth electrode pattern regions are alternately disposed along the first direction.

13. The capacitive touch panel of claim 1, wherein each of the first sensing electrodes includes a long stripe electrode extending along the first direction, each of the second sensing electrodes includes a long strip electrode extending along the second direction, and each of the first sensing electrodes partially overlaps the second sensing electrodes along a third direction perpendicular to the substrate.

14. The capacitive touch panel of claim 13, wherein the substrate has a first surface and a second surface, the first axis electrodes are disposed on the second surface of the substrate, and the second axis electrodes are disposed on the first surface of the substrate.

15. The capacitive touch panel of claim 13, wherein each of the first electrode pattern regions and each of the second electrode pattern regions are alternately disposed along the second direction, and each of the third electrode pattern regions and each of the fourth electrode pattern regions are alternately disposed along the first direction.

16. The capacitive touch panel of claim 1, wherein under a first driving mode, a sensing timing of the first axis electrode is separated from a sensing timing of the second axis electrode, a charging time and a discharging time of the first axis electrode when the first electrode pattern region is touched are longer than a charging time and a discharging time of the first axis electrode when the second electrode pattern region is touched, and a charging time and a discharging time of the second axis electrode when the third electrode pattern region is touched are longer than a charging time and a discharging time of the second axis electrode when the fourth electrode pattern region is touched.

17. The capacitive touch panel of claim 1, wherein under a second driving mode, sensing timings of the first axis electrodes are separated from each other, a charging time and a discharging time of the first axis electrode when the first electrode pattern region is touched are longer than a charging time and a discharging time of the first axis electrode when the second electrode pattern region is touched, and a charging time and a discharging time of the second axis electrode when the third electrode pattern region is touched are longer than a charging time and a discharging time of the second axis electrode when the fourth electrode pattern region is touched.