Touch location detecting panel having a simple layer structure

• US 8,654,094 B2
• Filed: 08/23/2012
• Issued: 02/18/2014
• Est. Priority Date: 03/05/2007
• Status: Active Grant

• Current Assignee: Melfas Incorporated
• Original Assignee: Melfas Incorporated
• Inventors: Bae, Sang-ho
• Primary Examiner(s): Eisen, Alexander
• Assistant Examiner(s): Marinelli, Patrick F
• Application Number:
  US13/592,433
• Publication Number:
  US 20130002588A1
• Time in Patent Office: 544 Days
• Field of Search: 345156-184, 178 1801- 2004
• US Class Current: 345/173
• CPC Class Codes: G06F 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• 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
• CPC Class Codes: G06F 3/0448 Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality

Abstract

The present invention relates to a touch location detecting panel and, more particularly, to a touch location panel having a plurality of sensing areas arranged two-dimensionally. The touch location detecting panel of the invention has on a surface at one side of a single film a plurality of sensing areas arranged two-dimensionally. Each of the sensing areas includes a plurality of partitioned areas electrically isolated from each other, and the partitioned areas are respectively connected to separate channels of a circuit for detecting a user'"'"'s touch on each of the partitioned areas. Accordingly, durability and productivity of the touch location detecting panel can be improved by simplifying the panel structure.

Claims

1. A method for manufacturing a touch detecting panel having a touch detecting area, a wiring area outside the touch detecting area and a plurality of wirings having a first portion within the touch detecting area and a second portion in the wiring area, the method comprising:

forming a conductive layer on a surface of a substrate;

patterning the conductive layer to form together a plurality of sensing areas arranged two-dimensionally in a matrix greater than or equal to 3×

3 to define the touch detecting area, wherein each of the plurality of sensing areas includes;

a separate and distinct first partitioned electrode for detecting a first axis location of a touch; and

a second partitioned electrode for detecting a second axis location of the touch, the second partitioned electrode being electrically separated from the first partitioned electrode,

wherein first partitioned electrodes arrayed at the same position on the first axis are electrically connected to one another through the first portion and the second portion of the plurality of wirings, and

wherein second partitioned electrodes arrayed at the same position on the second axis are contiguously connected to one another in the touch detecting area to form a sensing bar extended along the first axis direction; and

electrically connecting each of the first partitioned electrodes and the second partitioned electrodes to a separate channel of a touch detecting circuit.

2. The method according to claim 1, further comprising a protective layer formed on the touch detecting area.

3. The method according to claim 1, further comprising forming a transparent window of a display device on the substrate.

4. The method according to claim 1, further comprising forming a shielding layer on an opposite surface of the substrate.

5. The method according to claim 1, wherein the sensing bar has at least two different thicknesses.

6. The method according to claim 5, wherein the first partitioned electrodes have at least one of a ‘

L’

shape, a ‘

M’

shape and a triangular shape.

7. The method according to claim 1, wherein the first and the second partitioned electrodes and the first portion of the plurality of wirings are on the same surface of the substrate.

8. The method according to claim 1, wherein the substrate is formed of a transparent material.

9. The method according to claim 1, wherein the first partitioned electrode and the second partitioned electrode are substantially identical in area.

10. The method according to claim 1, wherein the first axis and the second axis intersect perpendicularly to each other.

11. The method according to claim 1, wherein the touch detecting circuit which detects the touch based on change in electric capacitance caused by the touch.

12. The method according to claim 1, wherein the first partitioned electrodes and the second partitioned electrodes are formed of a transparent conductive material.