TOUCH-SENSING DISPLAY DEVICE

• US 20130207899A1
• Filed: 02/09/2012
• Published: 08/15/2013
• Est. Priority Date: 02/09/2012
• Status: Abandoned Application

• Current Assignee: Wintek China Technology Ltd., Wintek Corporation
• Original Assignee: Wintek China Technology Ltd., Wintek Corporation
• Inventors: Su, Chen-Hao, Wang, Po-Hsien, Chen, Yu-Ting, Li, Chung-Hsien
• Application Number:
  US13/369,908
• Publication Number:
  US 20130207899A1
• Time in Patent Office: Days
• US Class Current: 345/173
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• CPC Class Codes: G06F 3/04164 Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
• CPC Class Codes: G06F 3/04184 Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes

Abstract

A touch-sensitive display device includes a plurality of gate lines, a plurality of data lines, and a plurality of touch-sensing lines. Each of the gate lines receives at least one first gate drive signal and at least one second gate drive signal. Each of the data lines receives at least one pixel data signal. The touch-sensing lines is overlapped with and spaced apart from the gate lines. The gate lines are divided into multiple line groups, and each of the line groups includes a plurality of gate lines. Each of the touch-sensing lines receives a sensing signal, and each of the line groups is overlapped with a touch-sensing line to form multiple overlapping regions that function as a touch-sensing unit.

Claims

1. A touch-sensitive display device, comprising:

a plurality of gate lines, wherein each of the gate lines receives at least one first gate drive signal and at least one second gate drive signal;

a plurality of data lines crossing the gate lines, wherein each of the data lines receives at least one pixel data signal, and two adjacent gate lines are intersected with two adjacent data lines to define the distribution area of a pixel unit; and

a plurality of touch-sensing lines being overlapped with and spaced apart from the gate lines, wherein the gate lines are divided into multiple line groups, each of the line groups comprises a plurality of gate lines, each of the touch-sensing lines receives a sensing signal, and each of the line groups is overlapped with a touch-sensing line to form multiple overlapping regions that function as a touch-sensing unit;

wherein the frame time of each display frame of the touch-sensitive display device has a data write-in period and a touch-sensing period, the first gate drive signal, in the data write-in period, successively drives the gate lines to allow the pixel data signal to be written into the pixel unit, and the second gate drive signal, in the touch-sensing period, successively drives each of the line groups at a time to allow each of the touch-sensing units to sense coupling capacitance formed as a result of a touch operation.

2. The touch-sensitive display device as claimed in claim 1, wherein, in the data write-in period, only one gate line is driven at one time by the first gate drive signal.

3. The touch-sensitive display device as claimed in claim 1, wherein the touch-sensing lines substantially parallel to the data lines and perpendicular to the gate lines.

4. The touch-sensitive display device as claimed in claim 1, wherein the second gate drive signal drives a gate line before the time when the first gate drive signal drives the same gate line.

5. The touch-sensitive display device as claimed in claim 1, wherein all gate lines in one of the line groups are driven by the second gate drive signal before the time when all gate lines in the same line group are successively driven by the first gate signal.

6. The touch-sensitive display device as claimed in claim 1, wherein the second gate drive signal is a negative-voltage signal or a positive-voltage signal.

7. The touch-sensitive display device as claimed in claim 1, wherein, in the touch-sensing period, the first gate drive signal is in a low level.

8. The touch-sensitive display device as claimed in claim 1, wherein the gate lines serve as an X-axis sensing series and the touch-sensing lines serve as a Y-axis sensing series of a touch-sensing structure.

9. A touch-sensitive display device, comprising:

a plurality of gate lines, wherein each of the gate lines receives at least one display scan signal and at least one coupling signal, the coupling signal is enabled when the display scan signal is in a low level, and the coupling signal drives a gate line before the time when the display scan signal drives the same gate line;

a plurality of data lines crossing the gate lines, wherein each of the data lines receives at least one pixel data signal, and two adjacent gate lines are intersected with two adjacent data lines to define the distribution area of a pixel unit; and

a plurality of touch-sensing lines being overlapped with and spaced apart from the gate lines, wherein the gate lines are divided into multiple line groups, each of the line groups comprises a plurality of gate lines, each of the touch-sensing lines receives a sensing signal, and each of the line groups is overlapped with a touch-sensing line to form multiple overlapping regions that function as a touch-sensing unit;

wherein the display scan signal successively drives the gate lines to allow the pixel data signal to be written into the pixel unit, and the coupling signal successively drives each of the line groups at a time to allow each of the touch-sensing units to sense coupling capacitance formed as a result of a touch operation.

10. The touch-sensitive display device as claimed in claim 9, wherein the touch-sensing lines substantially parallel to the data lines and perpendicular to the gate lines.

11. The touch-sensitive display device as claimed in claim 9, wherein the coupling signal is a negative-voltage signal or a positive-voltage signal.

12. The touch-sensitive display device as claimed in claim 9, wherein the gate lines serve as an X-axis sensing series and the touch-sensing lines serve as a Y-axis sensing series of a touch-sensing structure.

13. The touch-sensitive display device as claimed in claim 9, wherein all gate lines in one of the line groups are driven by the coupling signal before the time when all gate lines in the same line group are successively driven by the display scan signal.