TOUCH PANEL AND TOUCH DISPLAY PANEL

• US 20120169626A1
• Filed: 06/08/2011
• Published: 07/05/2012
• Est. Priority Date: 12/31/2010
• Status: Active Grant

• Current Assignee: AU Optronics Corporation
• Original Assignee: AU Optronics Corporation
• Inventors: Hsieh, Ming-Lun
• Granted Patent: US 9,086,766 B2
• Time in Patent Office: Days
• US Class Current: 345/173
• 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 touch panel including a substrate, a plurality of driving electrode series and a plurality of sensing electrode series is provided. The plurality of driving electrode series extending along a first direction is disposed on the substrate. The plurality of sensing electrode series extending along a second direction different from the first direction is disposed on the substrate. The plurality of driving electrode series and the plurality of sensing electrode series are intersected to constitute a plurality of sensing units, in which each sensing unit has a center region and a surrounding region. A first electrode spacing is formed between the driving electrode series and the sensing electrode series disposed in the center region, and a second electrode spacing is formed between the driving electrode series and the sensing electrode series disposed in the surrounding region. The second electrode spacing is smaller than the first electrode spacing.

Claims

1. A touch panel, comprising:

a substrate;

a plurality of driving electrode series, disposed on the substrate, each of the plurality of driving electrode series extending along a first direction; and

a plurality of sensing electrode series, disposed on the substrate, each of the plurality of sensing electrode series extending along a second direction, the first direction being different from the second direction, the plurality of driving electrode series and the plurality of sensing electrode series being intersected to constitute a plurality of sensing units, each sensing unit having a center region and a surrounding region, wherein a first electrode spacing is formed between the driving electrode series and the sensing electrode series disposed in the center region, a second electrode spacing is formed between the driving electrode series and the sensing electrode series disposed in the surrounding region, and the second electrode spacing is smaller than the first electrode spacing.

2. The touch panel according to claim 1, wherein each of the sensing units constituted by intersecting the driving electrode series and the sensing electrode has a geometric center.

3. The touch panel according to claim 2, wherein in each sensing unit, a distance from the geometric center to a boundary of the sensing unit is D, and a distance d from a boundary of the center region to the geometric center satisfies a formula of 0≦

d≦

0.95 D.

4. The touch panel according to claim 3, wherein the distance d from the boundary of the center region to the geometric center satisfies a formula of 0≦

d≦

0.8 D.

5. The touch panel according to claim 3, wherein the distance d from the boundary of the center region to the geometric center satisfies a formula of 0≦

d≦

0.5 D.

6. The touch panel according to claim 1, wherein in each sensing unit, a ratio of the second electrode spacing G2 to the first electrode spacing G1 is in the range of 0.06≦

G2/G1≦

0.8.

7. The touch panel according to claim 1, wherein a ratio of the second electrode spacing G2 to the first electrode spacing G1 is in the range of 0.07≦

G2/G1≦

0.7.

8. The touch panel according to claim 1, wherein a ratio of the second electrode spacing G2 to the first electrode spacing G1 is in the range of 0.1≦

G2/G1≦

0.6.

9. The touch panel according to claim 1, wherein the plurality of driving electrode series is electrically insulated from each other, and the plurality of sensing electrode series is electrically insulated from each other.

10. The touch panel according to claim 1, wherein each of the plurality of driving electrode series comprises a driving electrode trunk extending along the first direction and a plurality of driving electrode branches extending along the second direction, and each of the plurality of sensing electrode series comprises a sensing electrode trunk extending along the second direction and a plurality of sensing electrode branches extending along the first direction.

11. The touch panel according to claim 10, wherein each driving electrode trunk comprises a plurality of strip conductors and a plurality of driving bridge connectors, and each driving bridge connector spans the corresponding sensing electrode trunk and is connected between two adjacent strip conductors.

12. The touch panel according to claim 1, further comprising a plurality of patterned dielectric layers, located at intersection points of the plurality of driving electrode series and the plurality of sensing electrode series, wherein each patterned dielectric layer is located between each of the plurality of driving electrode series and each of the plurality of sensing electrode series, so as to electrically isolate the driving electrode and the sensing electrode.

13. A touch display panel, comprising:

a display panel;

a touch sensing element, disposed on the display panel, wherein the touch sensing element comprises;

a plurality of driving electrode series, each of the plurality of driving electrode series extending along a first direction; and

a plurality of sensing electrode series, each of the plurality of sensing electrode series extending along a second direction, the plurality of driving electrode series and the plurality of sensing electrode series being intersected to constitute a plurality of sensing units, each sensing unit having a center region and a surrounding region, wherein a first electrode spacing is formed between the driving electrode series and the sensing electrode series disposed in the center region, and a second electrode spacing is formed between the driving electrode series and the sensing electrode series disposed in the surrounding region, and the second electrode spacing is smaller than the first electrode spacing.

14. The touch display panel according to claim 13, wherein the touch sensing element is directly integrated on the display panel.

15. The touch display panel according to claim 13, further comprising an auxiliary substrate, wherein the touch sensing element is disposed on the display panel through the auxiliary substrate.

16. The touch display panel according to claim 13, wherein the touch sensing element is embedded and integrated into the display panel.