Capacitive touch panel

Patent metadata

Field	Value
Publication number	US-10162441-B2
Application number	US-201715450214-A
Country	US
Kind code	B2
Filing date	Mar 6, 2017
Priority date	Mar 10, 2016
Publication date	Dec 25, 2018
Grant date	Dec 25, 2018

Abstract

A capacitive touch panel is disclosed. A touch sensing module in its laminated structure includes same touch sensor patterns. Each touch sensor pattern includes a first electrode, a second electrode and a bridge structure. The first electrode includes a first sub-electrode˜a fourth sub-electrode and the second electrode includes a fifth sub-electrode˜an eighth sub-electrode formed by sections of conductive material having different slopes. First sub-electrode and second sub-electrode are symmetrical to a first direction of a first axis; third sub-electrode and fourth sub-electrode are symmetrical to a second direction of first axis. Fifth sub-electrode and sixth sub-electrode are symmetrical to a third direction of a second axis; seventh sub-electrode and eighth sub-electrode are symmetrical to a fourth direction of second axis. The bridge structure disposed at intersection of first axis and second axis bridges second electrode and provides insulation between second electrode and first electrode.

First claim

What is claimed is:

1. A capacitive touch panel having an on-cell type, the capacitive touch panel comprising:
a laminated structure, comprising:
a liquid-crystal display module;
a touch sensing module disposed on the liquid-crystal display module; and
a polarization module disposed on the touch sensing module;

wherein the touch sensing module comprises a plurality of same touch sensor patterns, and each touch sensor pattern comprises:
a first electrode comprising a first sub-electrode, a second sub-electrode, a third sub-electrode and a fourth sub-electrode, wherein the first sub-electrode, the second sub-electrode, the third sub-electrode and the fourth sub-electrode are formed by sections of conductive material having different slopes respectively, the first sub-electrode and the second sub-electrode are extended and symmetrical to a first direction of a first axis, and the third sub-electrode and the fourth sub-electrode are extended and symmetrical to a second direction of the first axis, wherein the first direction and the second of the first axis are opposite;
a second electrode comprising a fifth sub-electrode, a sixth sub-electrode, a seventh sub-electrode and a eighth sub-electrode, wherein the fifth sub-electrode, the sixth sub-electrode, the seventh sub-electrode and the eighth sub-electrode are formed by sections of conductive material having different slopes respectively, the fifth sub-electrode and the sixth sub-electrode are symmetrical to a third direction of a second axis and the seventh sub-electrode and the eighth sub-electrode are symmetrical to a fourth direction of the second axis, wherein the third direction and the fourth of the second axis are opposite; and
a bridge structure, disposed at an intersection of the first axis and the second axis, for bridging the second electrode and providing insulation between the second electrode and the first electrode.

2. The capacitive touch panel of claim 1 , wherein the first sub-electrode and the third sub-electrode are symmetrical to the second axis.

3. The capacitive touch panel of claim 1 , wherein the second sub-electrode and the fourth sub-electrode are symmetrical to the second axis.

4. The capacitive touch panel of claim 1 , wherein the fifth sub-electrode and the seventh sub-electrode are symmetrical to the first axis.

5. The capacitive touch panel of claim 1 , wherein the sixth sub-electrode and the eighth sub-electrode are symmetrical to the first axis.

6. The capacitive touch panel of claim 1 , wherein the intersection of the first axis and the second axis is a center of the touch sensor pattern.

7. The capacitive touch panel of claim 6 , wherein the first sub-electrode and the fourth sub-electrode are symmetrical to the center.

8. The capacitive touch panel of claim 6 , wherein the second sub-electrode and the third sub-electrode are symmetrical to the center.

9. The capacitive touch panel of claim 6 , wherein the fifth sub-electrode and the eighth sub-electrode are symmetrical to the center.

10. The capacitive touch panel of claim 6 , wherein the sixth sub-electrode and the seventh sub-electrode are symmetrical to the center.

11. The capacitive touch panel of claim 1 , wherein the bridge structure comprises:
a conductive layer for bridging the fifth sub-electrode, the sixth sub-electrode, the seventh sub-electrode and the eighth sub-electrode of the second electrode; and
an insulating layer, disposed between the conductive layer and the first electrode, for providing insulation between the first electrode and the conductive layer bridging the second electrode.

12. The capacitive touch panel of claim 1 , wherein the touch sensor pattern also comprises a dummy electrode disposed out of the first electrode and the second electrode and there is a fixed space between the dummy electrode and the first electrode and between the dummy electrode and the second electrode.

13. The capacitive touch panel of claim 12 , wherein the dummy electrode is floating.

14. The capacitive touch panel of claim 12 , wherein an area of the dummy electrode is larger than an area of the first electrode and an area of the second electrode.

15. The capacitive touch panel of claim 1 , wherein a width of the first electrode ranges between 150˜450 um.

16. The capacitive touch panel of claim 1 , wherein a width of the second electrode ranges between 150˜450 um.

17. The capacitive touch panel of claim 1 , wherein the first axis is Y axis and the first direction and the second direction are a positive direction and a negative direction of the Y axis.

18. The capacitive touch panel of claim 1 , wherein the second axis is X axis and the third direction and the fourth direction are a positive direction and a negative direction of the X axis.

19. The capacitive touch panel of claim 1 , wherein the first electrode is used as touch driving electrode and the second electrode is used as touch sensing electrode.

20. The capacitive touch panel of claim 1 , wherein the first electrode is used as touch sensing electrode and the second electrode is used as touch driving electrode.

Assignees

• Raydium Semiconductor Corp

Inventors

• Lin Yi-Ying
• Shieh Hsin-Wei

Classifications

• G06F3/0418

  for error correction or compensation, e.g. based on parallax, calibration or alignment · CPC title

• G06F3/044 Primary

  by capacitive means · CPC title

• G02F1/13338

  Input devices, e.g. touch panels · CPC title

• G06F2203/04111

  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 title

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title