Touch panel

• US 9,058,076 B2
• Filed: 06/27/2014
• Issued: 06/16/2015
• Est. Priority Date: 05/09/2008
• Status: Active Grant

• Current Assignee: AU Optronics Corporation
• Original Assignee: AU Optronics Corporation
• Inventors: Wijaya, Martinus Tony, Ma, Mei-Sheng, Wu, Yuan-Chun, Lee, Hsin-Hung, Cheng, Kuo-Hsing, Kuo, Han Ping
• Primary Examiner(s): MANDEVILLE, JASON M
• Application Number:
  US14/316,888
• Publication Number:
  US 20140307185A1
• Time in Patent Office: 354 Days
• Field of Search: 345/173, 178/18.01, 178/18.06, 178/18.09
• US Class Current: 1/1
• 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, wherein the circuit end and the non-circuit end are adjacent to each other and are arranged in an L shape at adjacent edges of the image driving circuit substrate, and an image driving element is disposed on an inner surface of the image driving circuit substrate at the circuit end for controlling an image driving circuit;

a display substrate, disposed over the image driving circuit substrate to partially overlap with the image driving circuit substrate and expose the circuit end of the image driving circuit substrate, the display substrate having a first end corresponding to the non-circuit end and overhanging the non-circuit end, and a second end corresponding to an end opposite to the non-circuit end, wherein the first end and the second end are opposite to each other at opposing ends of the display substrate, the display substrate having a protruding part corresponding to the first end protruding beyond the non-circuit end, and the image driving circuit substrate having a protruding part corresponding to the circuit end protruding from one end adjacent to the second end;

a liquid crystal layer disposed between the image driving circuit substrate and the display substrate wherein an end of the liquid crystal layer is aligned with the non-circuit end and another end of the liquid crystal layer is aligned with the second end;

a touch sensing circuit disposed on an inner surface of the display substrate to coincide with the first end and the second end of the display substrate and disposed between the liquid crystal layer and the display substrate; and

a touch sensing processor electrically connected to the touch sensing circuit, wherein the touch sensing processor is disposed on the protruding part of the display substrate and an inner surface of the touch sensing circuit.

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

3. 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.

4. 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.

5. The touch panel of claim 1, wherein the image driving element is electrically connected with the image driving circuit substrate, the circuit end overhangs one end adjacent to the second end, and the image driving element is disposed on the image driving circuit substrate near the circuit end.

6. The touch panel of claim 5, wherein the image driving circuit substrate has the image driving circuit disposed thereon and electrically connected to the image driving element.

7. The touch panel of claim 5, 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.

8. A touch panel, comprising:

an image driving circuit substrate, having a circuit end and a non-circuit end, wherein the circuit end and the non-circuit end are adjacent to each other and are arranged in an L shape at adjacent edges of the image driving circuit substrate, and an image driving element is disposed on an inner surface of the image driving circuit substrate near the circuit end for controlling an image driving circuit;

a display substrate, disposed over the image driving circuit substrate, the display substrate having a first end corresponding to the non-circuit end and overhanging the non-circuit end, and a second end corresponding to an end opposite to the non-circuit end, wherein the first end and the second end are opposite each other at opposing ends of the display substrate, the display substrate having a protruding part corresponding to the first end protruding beyond the non-circuit end, and the image driving circuit substrate having a protruding part corresponding to the circuit end protruding from one end adjacent to the first end;

a display media layer disposed between the image driving circuit substrate and the display substrate wherein an end of the display media layer is aligned with the non-circuit end and another end of the display media layer is aligned with the second end;

a touch sensing circuit disposed on an inner surface of the display substrate to coincide with the first end and the second end of the display substrate and disposed between the display media layer and the display substrate; and

a touch sensing processor electrically connected to the touch sensing circuit, wherein the touch sensing processor is disposed on the protruding part of the display substrate and an inner surface of the touch sensing circuit.

9. The touch panel of claim 8, further comprising a color filter layer disposed on the inner surface of the display substrate, the touch sensing circuit is disposed between the color filter layer and the display substrate.

10. The touch panel of claim 8, 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.

11. The touch panel of claim 8, 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.

12. The touch panel of claim 8, wherein the image driving element is electrically connected with the image driving circuit substrate, the circuit end overhangs one end adjacent to the second end, and the image driving element is disposed on the image driving circuit substrate near the circuit end.

13. The touch panel of claim 12, wherein the image driving circuit substrate has the image driving circuit disposed thereon and electrically connected to the image driving element.

14. The touch panel of claim 12, 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.

15. The touch panel of claim 8, wherein the display media layer is a liquid crystal layer or an organic light emitting diode layer.