Touch Panel

• US 20090278813A1
• Filed: 05/06/2009
• Published: 11/12/2009
• Est. Priority Date: 05/09/2008
• Status: Active Grant

• Current Assignee: AU Optronics Corporation
• Original Assignee: AU Optronics Corporation
• Inventors: Kuo, Han Ping, Wijaya, Martinus Tony, Wu, Yuan-Chun, Lee, Hsin-Hung, Ma, Mei-Sheng, Cheng, Kuo-Hsing
• Granted Patent: US 8,803,815 B2
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G06F 2203/04103 Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
• CPC Class Codes: G06F 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/0416 Control or interface arrangements specially adapted for digitisers
• CPC Class Codes: G06F 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
• CPC Class Codes: G06F 3/044 by capacitive means

Abstract

The present invention provides a touch panel used in a display device. The touch panel of the present invention is configured to display images and to receive as well as to process instructions inputted by user'"'"'s touches. A display substrate partially overlaps with an image driving circuit substrate of the touch panel. A touch sensing circuit is disposed on the inner side of the display substrate. A touch sensing processor is disposed on the inner side of a touch sensing circuit and is also electrically coupled to the touch sensing circuit. Consequently, the thickness of the touch panel as well as the overall thickness of the display device is reduced.

Claims

1. A touch panel, comprising:

an image driving circuit substrate, having a circuit end and a non-circuit end;

a display substrate, disposed over the image driving circuit substrate to at least partially overlap with the image driving circuit substrate, the display substrate having a first end corresponding to the non-circuit end and overhanging the non-circuit end;

a touch sensing circuit on an inner side of the display substrate; and

a touch sensing processor electrically connected to the touch sensing circuit, wherein the touch sensing processor is disposed on the inner side of the display substrate near the first end and is exposed outside the non-circuit end.

2. The touch panel of claim 1, wherein the circuit end and the non-circuit end are opposite each other.

3. The touch panel of claim 1, wherein the circuit end and the non-circuit end are adjacent each other and are arranged in an L shape.

4. The touch panel of claim 1, wherein the display substrate is disposed to expose the circuit end of the image driving circuit substrate.

5. The touch panel of claim 1, further comprising a color filter layer disposed on the inner side of the display substrate, the touch sensing processor is disposed between the color filter layer and the display substrate.

6. The touch panel of claim 1, wherein the touch sensing circuit comprises a capacitive touch sensing circuit, a resistive touch sensing circuit, an surface acoustic wave touch sensing circuit, or an infrared touch sensing circuit.

7. The touch panel of claim 1, further comprising a position signal transmission module electrically connected to the touch sensing processor, the position signal transmission module receiving and transmitting a position signal from the touch sensing processor, wherein the position signal transmission module overhanges the display substrate.

8. The touch panel of claim 1, further comprising an image driving element electrically connected with the image driving circuit substrate, wherein the display substrate has a second end corresponding to the circuit end, the circuit end overhangs the second end, the image driving element is disposed on the image driving circuit substrate near the circuit end.

9. The touch panel of claim 8, wherein the image driving circuit substrate has an image driving circuit disposed thereon and electrically connected to the image driving element.

10. The touch panel of claim 8, further comprising an image signal transmission module, wherein the image signal transmission module is electrically connected to the image driving element and transmits a driving signal to the image driving element, and the image signal transmission module overhangs the image driving circuit substrate from the circuit end.

11. The touch panel of claim 8, further comprising a transmission module disposed between the image driving circuit substrate and the display substrate, the transmission module including:

a first conduction pad disposed on the inner side of the display substrate and electrically connected to the touch sensing processor;

a second conduction pad disposed on the image driving circuit substrate and corresponding to the first conduction pad; and

a conduction medium disposed between the first conduction pad and the second conduction pad, wherein one end of the conduction medium is electrically connected to the first conduction pad while the other end of the conduction medium is electrically connected to the second conduction pad.

12. The touch panel of claim 11, further comprising an integrated signal transmission module, wherein the integrated signal transmission module is electrically connected to the image driving element for transmitting a driving signal to the image driving element, the integrated signal transmission module is disposed on the image driving circuit substrate and extends over the circuit end, the integrated signal transmission module is also electrically connected to the transmission module for receiving and transmitting a position signal processed by the touch sensing processor.