Sensory structure of touch panel

• US 8,537,135 B2
• Filed: 10/10/2008
• Issued: 09/17/2013
• Est. Priority Date: 12/25/2007
• Status: Active Grant

• Current Assignee: Cando Corporation
• Original Assignee: Cando Corporation
• Inventors: Chih-Yung, Ting, Yih-Jer, Lin
• Primary Examiner(s): Sniezek, Andrew L
• Application Number:
  US12/285,647
• Publication Number:
  US 20090160824A1
• Time in Patent Office: 1,803 Days
• Field of Search: None
• US Class Current: 345/174
• CPC Class Codes: G06F 2203/04111 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 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 two-dimensional sensory structure for the capacitive touch panel is provided. The provided two-dimensional sensory structure includes a substrate having plural first metal structures and second metal structures on a first surface thereof, a dot-like insulating layer located on the substrate and composed of plural insulating dots, and an electrode layer located on the dot-like insulating layer and composed of plural conductive traces. The insulating dots are each corresponding to the first metal structures respectively, and thereby a first portion of the conductive traces arranged along a first direction are electrically connected to each other, and the conductive traces that are arranged along a second direction are electrically insulated therefrom. The thickness of the touch panel according to the invention is effectively reduced.

Claims

1. A two-dimensional sensing structure of a capacitive touch panel, comprising:

a substrate having a plurality of metallic structures on a first surface thereof;

a first electrode layer located on said first surface and comprising a plurality of first sensing areas, wherein said first sensing areas are electrically connected with each other through a plurality of first conductive traces in a first direction;

a dot-like insulating layer located on said first electrode layer and comprising a plurality of insulating bodies, wherein said insulating bodies are respectively positioned correspondingly to said first sensing areas; and

a second electrode layer located on a surface of said dot-like insulating layer opposite to said first surface and comprising a plurality of second sensing areas, wherein said second sensing areas are electrically connected with each other through a plurality of second conductive traces in a second direction different from said first direction, and wherein said insulating bodies are positioned at the intersections of said first conductive traces and said second conductive traces without overlapping any of said first sensing areas and said second sensing areas;

wherein each of said first and second conductive traces having at least two conductive bridges and the at least two conductive bridges ensure that a disconnection of the two-dimensional sensing structure does not occur in case of the fault of one of the at least two conductive bridges.

2. The two-dimensional sensing structure of claim 1, further comprising a protection layer on said second electrode layer.

3. The two-dimensional sensing structure of claim 2, wherein said protection layer comprises a pattern layer on either one side thereof, so as to provide an appearance of periphery-like pattern.

4. The two-dimensional sensing structure of claim 3, wherein said protection layer is provided with said pattern layer before being attached on said second electrode layer.

5. The two-dimensional sensing structure of claim 2, wherein said protection layer comprises an optical coating layer on either one side thereof which is one selected from a group consisting of an anti-reflection layer, an anti-glare layer and an anti-static layer.

6. The two-dimensional sensing structure of claim 5, wherein said protection layer is provided with said optical coating layer before being attached on said second electrode layer.

7. The two-dimensional sensing structure of claim 1, further comprising a color filter layer having a black matrix layer on a second surface of said substrate, wherein said second surface is opposite to said first surface.

8. The two-dimensional sensing structure of claim 1, wherein said first sensing areas and said second sensing areas are arranged as a first array and a second array respectively.

9. The two-dimensional sensing structure of claim 8, wherein each of said first and second sensing areas is shaped as one selected from a group consisting of diamond, rectangular, triangular and a combination thereof.

10. A two-dimensional sensing structure of a capacitive touch panel, comprising:

a substrate having a plurality of first conductive structures and having a plurality of second conductive structures for external connection;

a dot-like insulating layer located on said substrate and comprising a plurality of insulating bodies, wherein each of said insulating bodies is positioned correspondingly to each of said first conductive structures respectively; and

an electrode layer located on said dot-like insulating layer and comprising an array of sensing areas;

wherein a first portion of said sensing areas are electrically connected with each other in a first direction through at least one of said first conductive structures, a second portion of said sensing areas are electrically connected with each other through at least one of said second conductive structures in a second direction different from said first direction; and

wherein said insulating bodies are positioned at the intersections of said first conductive structures and said second conductive structures without overlapping any of said sensing areas;

wherein each of said first and second conductive structures having at least two conductive bridges and the at least two conductive bridges ensure that a disconnection of the two-dimensional sensing structure does not occur in case of the fault of one of the at least two conductive bridges.

11. The two-dimensional sensing structure of claim 10, further comprising a protection layer on said electrode layer.

12. The two-dimensional sensing structure of claim 11, wherein said protection layer comprises a pattern layer on either one side thereof, so as to provide an appearance of periphery-like pattern.

13. The two-dimensional sensing structure of claim 12, wherein said protection layer is provided with said pattern layer before being attached on said second electrode layer.

14. The two-dimensional sensing structure of claim 11, wherein said protection layer comprises an optical coating layer on either one side thereof which is one selected from a group consisting of an anti-reflection layer, an anti-glare layer and an anti-static layer.

15. The two-dimensional sensing structure of claim 14, wherein said protection layer is provided with said optical coating layer before being attached on said second electrode layer.

16. The two-dimensional sensing structure of claim 10, wherein each of said sensing areas is shaped as one selected from a group consisting of diamond, rectangular, triangular and a combination thereof.

17. The two-dimensional sensing structure of claim 10, further comprising a color filter layer having a black matrix on a second surface of said substrate, wherein said second surface is opposite to said first surface.