CAPACITIVE TOUCH PANEL

• US 20100238133A1
• Filed: 03/12/2010
• Published: 09/23/2010
• Est. Priority Date: 03/17/2009
• Status: Abandoned Application

• Current Assignee: Wintek Corporation
• Original Assignee: Wintek Corporation
• Inventors: Huang, Ping-Wen, Wu, Hsien-Hsin
• Application Number:
  US12/722,533
• Publication Number:
  US 20100238133A1
• Time in Patent Office: Days
• US Class Current: 345/174
• CPC Class Codes: G06F 3/0445 using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
• 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 including a first substrate and the elements disposed on the first substrate such as a plurality of first sensing series, a plurality of second sensing series, and a plurality of compensating patterns. Each of the first sensing series is formed by first electrodes serially connected through first connecting lines in a first direction, and each of the second series is formed by second electrodes serially connected through second connecting lines in a second direction intersecting the first direction. The first electrodes and the second electrodes are electrically insulated from one another. Each of the first electrodes is separated from one of the second electrodes by a gap in a horizontal direction parallel to the first substrate. The compensating patterns are located inside the gaps.

Claims

1. A capacitive touch panel, comprising:

a first substrate;

a plurality of first sensing series disposed on a surface of the first substrate, and each of the first sensing series having a plurality of first electrodes and a plurality of first connecting lines, wherein the first connecting lines serially connect the first electrodes in a first direction;

a plurality of second sensing series, each of the second sensing series having a plurality of second electrodes and a plurality of second connecting lines, the second connecting lines serially connecting the second electrodes in a second direction intersecting the first direction, and the first sensing series being electrically insulated from the second sensing series, wherein each of the first electrodes is separated from adjacent one of the second electrodes by a gap in a horizontal direction parallel to the first substrate; and

a plurality of compensating patterns disposed inside the gaps, a difference between a refraction index of the compensating patterns and a refraction index of the first electrodes being at least small than 0.5, and the refraction index of the first electrodes being substantially equal to a refraction index of the second electrodes.

2. The capacitive touch panel as claimed in claim 1, wherein the second electrodes are disposed on the first substrate.

3. The capacitive touch panel as claimed in claim 1, further comprising a second substrate parallel to the first substrate, and the second sensing series being disposed on the second substrate.

4. The capacitive touch panel as claimed in claim 1, further comprising an insulator layer, and the first sensing series and the second sensing series being disposed at two opposite sides of the insulator layer.

5. The capacitive touch panel as claimed in claim 4, further comprising a protection layer covering the second electrodes.

6. The capacitive touch panel as claimed in claim 4, wherein the compensating patterns comprises a plurality of first compensating portions connecting with the insulator layer, the first compensating portions are located between two adjacent first electrodes and corresponding to the second electrodes, and side surfaces of the first compensating portions contact side surfaces of the adjacent first electrodes.

7. The capacitive touch panel as claimed in claim 6, wherein the compensating patterns further comprises a plurality of second compensating portions connecting with the insulator layer, the second compensating portions are located between two adjacent second electrodes and corresponding to the first electrodes, and side surfaces of the second compensating portions contact side surfaces of the adjacent second electrodes.

8. The capacitive touch panel as claimed in claim 7, wherein a material of the compensating patterns comprises a dielectric material.

9. The capacitive touch panel as claimed in claim 8, wherein the refraction index of the compensating patterns is from 1.55 to 2.5.

10. The capacitive touch panel as claimed in claim 1, wherein the compensating patterns comprise a plurality of electrode compensating patterns electrically insulated from the first electrodes and the second electrodes.

11. The capacitive touch panel as claimed in claim 10, wherein each of the electrode compensating patterns is stripe-shaped.

12. The capacitive touch panel as claimed in claim 10, wherein at least a portion of the electrode compensating patterns are connected to one another.

13. The capacitive touch panel as claimed in claim 10, wherein a material of the electrode compensating patterns comprises indium tin oxide or indium zinc oxide.

14. The capacitive touch panel as claimed in claim 10, further comprising a insulator layer, and the first sensing series and the second sensing series being disposed at two opposite sides of the insulator layer.

15. The capacitive touch panel as claimed in claim 14, wherein the electrode compensating patterns and the first electrodes are coplanar disposed.

16. The capacitive touch panel as claimed in claim 14, wherein the electrode compensating patterns and the second electrodes are coplanar disposed.

17. The capacitive touch panel as claimed in claim 14, wherein a portion of the electrode compensating patterns and the first electrodes are coplanar disposed, and the rest electrode compensating patterns and the second electrodes are coplanar disposed.

18. The capacitive touch display panel as claimed in claim 1, wherein the first substrate is a transparent glass, a color filter, a plastic film, or a cover lens.

19. The capacitive touch display panel as claimed in claim 3, wherein the second substrate is a transparent glass, a color filter, a plastic film, or a cover lens.