DISPLAY DEVICE WITH TOUCH FUNCTION AND 2D SENSING METHOD THEREOF

• US 20110242031A1
• Filed: 03/31/2011
• Published: 10/06/2011
• Est. Priority Date: 04/02/2010
• Status: Abandoned Application

• Current Assignee: Novatek Microelectronics Corporation (Novatek Microelectronics Corp Limited)
• Original Assignee: Novatek Microelectronics Corporation (Novatek Microelectronics Corp Limited)
• Inventors: Yu, Wen-Hao, Huang, Chiu-Huang, Cheng, Wen-Hsin, Kuo, Feng-Jung
• Application Number:
  US13/076,454
• Publication Number:
  US 20110242031A1
• 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 3/04166 Details of scanning methods, e.g. sampling time, grouping of sub areas or time sharing with display driving Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally G06F3/04184
• 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 3/045 using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact

Abstract

A display device with a touch function is provided. The display device includes a display panel and a touch panel. The display panel has a plurality of image scan lines, and the image scan lines are respectively activated by a plurality of scan signals generated by a gate driver according to a time sequence. The touch panel has a plurality of touch scan lines and a plurality of touch sensing lines, wherein the touch scan lines and the touch sensing lines are disposed crossing each other for sensing a touched position. The gate driver also provides a plurality of touch scan signals to the touch scan lines according to a time sequence.

Claims

1. A display device with a touch function, comprising:

a display panel, having a plurality of image scan lines, wherein the image scan lines are respectively activated by a plurality of scan signals generated by a gate driver according to a first time sequence; and

a touch panel, having a plurality of touch scan lines and a plurality of touch sensing lines, wherein the touch scan lines and the touch sensing lines are disposed crossing each other for sensing a touched position, and the gate driver also provides a plurality of touch scan signals respectively to the touch scan lines according to a second time sequence.

2. The display device according to claim 1, wherein the touch scan lines are in a horizontal direction of the display panel, and the touch sensing lines are in a vertical direction of the display panel.

3. The display device according to claim 1 further comprising a controller, wherein the controller is connected to the display panel and the touch panel for obtaining a corresponding position of a touch point on the display panel.

4. The display device according to claim 1, wherein the touch panel has a plurality of touch sensing units, wherein the touch sensing units are arranged as a 2-dimensional (2D) array and are connected to the touch scan lines and the touch sensing lines.

5. The display device according to claim 1, wherein the display panel comprises a thin film transistor (TFT) array.

6. The display device according to claim 1, wherein the display panel is a thin film transistor liquid crystal display (TFT-LCD) panel.

7. The display device according to claim 1, wherein when the touch scan lines are sequentially activated, signals at a plurality of sensing points on the touch scan lines are output through the touch sensing lines.

8. The display device according to claim 1, wherein the gate driver respectively generates the scan signals and the touch scan signals for the display panel and the touch panel.

9. The display device according to claim 1, wherein the gate driver generates the scan signals, and the touch scan signals are sequentially selected from the scan signals and input to the touch scan lines of the touch panel.

10. A display device with a touch function, comprising:

a gate driver, for generating a plurality of pulse signals according to a time sequence;

a display panel, having a plurality of image scan lines, wherein the image scan lines are respectively and sequentially activated by the pulse signals; and

a touch panel, having a plurality of scan sensing lines and a plurality of touch sensing lines, wherein the scan sensing lines and the touch sensing lines are disposed crossing each other, and the scan sensing lines are also activated by the pulse signals.

11. The display device according to claim 10, wherein the gate driver generates the pulse signals and respectively inputs the pulse signals to the display panel and the touch panel.

12. The display device according to claim 10, wherein the gate driver generates the pulse signals for the display panel and sequentially selects and inputs a portion of the pulse signals to the touch panel.

13. The display device according to claim 10 further comprising a controller, wherein the controller is connected to the display panel and the touch panel for obtaining a corresponding position of a touch point on the display panel.

14. A 2D sensing method of a touch panel, wherein the touch panel is stacked with a display panel, and the display panel is driven by a gate driver, the 2D sensing method comprising:

sequentially generating a plurality of pulse signals in the gate driver; and

sequentially inputting the pulse signals to the touch panel to activate a plurality of touch scan lines.

15. The 2D sensing method according to claim 14, wherein the pulse signals generated by the gate driver are respectively input to the display panel and the touch panel.

16. The 2D sensing method according to claim 14, wherein

when the pulse signals generated by the gate driver are input to the display panel, a portion of the pulse signals are sequentially selected and input to the touch panel.

17. The 2D sensing method according to claim 14 further comprising sensing at least one touch signal on the touch scan lines through a plurality of touch sensing lines of the touch panel, so as to determine a touched position of a touch point.

18. The 2D sensing method according to claim 14 further comprising converting the touched position into a corresponding position on the display panel.