Touch sensitive device

• US 8,982,088 B2
• Filed: 01/20/2010
• Issued: 03/17/2015
• Est. Priority Date: 04/15/2009
• Status: Active Grant

• Current Assignee: HannStar Display Corporation
• Original Assignee: Industrial Technology Research Institute
• Inventors: Kung, Chen-Pang, Chen, Yu-Jen, Lin, Chen-Wei
• Primary Examiner(s): Lee, Gene W
• Application Number:
  US12/690,908
• Publication Number:
  US 20100265193A1
• Time in Patent Office: 1,882 Days
• Field of Search: 345173-183, 178 1801- 1811, 178 1901- 1907
• US Class Current: 345/174
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 2203/04107 Shielding in digitiser, i.e. guard or shielding arrangements, mostly for capacitive touchscreens, e.g. driven shields, driven grounds
• CPC Class Codes: G06F 2203/04112 Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material
• CPC Class Codes: G06F 3/042 by opto-electronic means
• 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: G09G 2300/0426 Layout of electrodes and connections
• CPC Class Codes: G09G 5/00 Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators image data processing or generation, in general G06T

Abstract

A touch sensitive device is provided. The device includes a substrate; a plurality of first electrodes formed on the substrate and arranged along a first direction without overlapping one another; a first insulating layer formed on the substrate and covering the plurality of first electrodes; and a plurality of second electrodes formed on the first insulating layer and arranged along a second direction without overlapping one another, wherein the first direction is vertical to the second direction.

Claims

1. A touch sensing device, comprising:

a substrate;

a plurality of first electrodes formed on the substrate and arranged along a first direction without overlapping one another;

a first insulating layer formed on the substrate and covering the plurality of first electrodes;

a plurality of second electrodes formed on the first insulating layer and arranged along a second direction without overlapping one another, wherein each of the plurality of second electrodes has a first surface facing away from the first insulating layer and two second surfaces being opposite to each other and connecting the first surface and the first insulating layer; and

a material layer formed on the first insulating layer and enclosing the plurality of second electrodes, wherein the material layer directly contacts with and covers the first surface and the second surfaces of each of the plurality of second electrodes, and the material layer comprises a second insulating layer or an adhesive layer;

wherein the first direction is orthogonal to the second direction, the first electrodes and the second electrodes are configured to sense capacitance variation in respond to a conductor indirectly touching the first electrodes,

wherein a display device is disposed directly on the material layer of the touch sensing device.

2. The touch sensing device as claimed in claim 1, further comprising:

one or more layer pairs formed on the material layer, wherein when the one layer pair is formed on the material layer, the layer pair comprises a third electrode layer and a third insulating layer formed on the material layer in sequence, and wherein when the layer pairs are formed on the material layer, the layer pairs are formed on the material layer in sequence, and each of the layer pairs comprises a third electrode layer and a third insulating layer formed in sequence from a side adjacent to the material layer to another side away from the material layer; and

another third electrode layer formed on the one or more layer pairs.

3. The touch sensing device as claimed in claim 1, further comprising the conductor, wherein the first electrodes and the second electrodes are used to sense total capacitance variation according to the conductor indirectly touching the first electrodes.

4. The touch sensing device as claimed in claim 1, further comprising:

a third electrode layer formed on the material layer, wherein the material layer is the second insulating layer.

5. The touch sensing device as claimed in claim 4, wherein the second insulating layer and the third electrode layer form an isolating layer.

6. The touch sensing device as claimed in claim 5, further comprising an adhesive layer formed on the isolating layer.

7. A touch sensing device, comprising:

a substrate;

a plurality of first electrodes formed on the substrate and arranged along a first direction without overlapping one another;

a first insulating layer formed on the substrate and covering the plurality of first electrodes;

a plurality of second electrodes formed on the first insulating layer and arranged along a second direction without overlapping one another, wherein each of the plurality of second electrodes has a first surface facing away from the first insulating layer and two second surfaces being opposite to each other and connecting the first surface and the first insulating layer;

a material layer formed on the first insulating layer and enclosing the plurality of second electrodes, wherein the material layer directly contacts with and covers the first surface and the second surfaces of each of the plurality of second electrodes, and the material layer comprises a second insulating layer or an adhesive layer;

one or more layer pairs formed on the material layer, wherein when the one layer pair is formed on the material layer, the layer pair comprises a third electrode layer and a third insulating layer formed on the material layer in sequence, and wherein when the layer pairs are formed on the material layer, the layer pairs are formed on the material layer in sequence, and each of the layer pairs comprises a third electrode layer and a third insulating layer formed in sequence from a side adjacent to the material layer to another side away from the material layer; and

another third electrode layer formed on the one or more layer pairs,

wherein the first direction is orthogonal to the second direction, the first electrodes and the second electrodes are configured to sense capacitance variation in respond to a conductor indirectly touching the first electrodes.

8. The touch sensing device as claimed in claim 7, wherein the second insulating layer, the one or more layer pairs, and the another third electrode layers form an isolating layer.

9. The touch sensing device as claimed in claim 8, further comprising an adhesive layer formed on the isolating layer.