DISPLAY DEVICE WITH INTEGRATED TOUCH SCREEN AND METHOD OF DRIVING THE SAME

• US 20140176459A1
• Filed: 10/03/2013
• Published: 06/26/2014
• Est. Priority Date: 12/26/2012
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Display Co., Ltd.
• Inventors: PYO, Seung Eun
• Granted Patent: US 9,575,584 B2
• 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 3/041661 using detection at multiple resolutions, e.g. coarse and fine scanning; using detection within a limited area, e.g. object tracking window
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes

Abstract

Discussed is a display device with integrated touch screen including a panel including a plurality of electrodes; a data driver for converting RGB data into a data voltage, and supplying the data voltage to data lines; a gate driver for sequentially supplying a gate-on signal to n-numbered gate lines to apply the data voltage to pixels of the panel when a driving mode of the panel is a display driving mode; and a touch IC for generating a touch scan signal and supplying the touch scan signal to the plurality of electrodes of the panel when a driving mode of the panel is a touch driving mode, wherein the gate driver sequentially supplies the gate-on signal to the gate lines, and then simultaneously supplies the gate-on signal to the gate lines, and the data driver supplies the data voltage of the same level to the data lines.

Claims

1. A display device with integrated touch screen, comprising:

a panel including a plurality of electrodes;

a data driver for converting RGB data inputted from a timing controller into a data voltage, and supplying the data voltage to data lines;

a gate driver for sequentially supplying a gate-on signal to first to nth gate lines so as to apply the data voltage to pixels of the panel when a driving mode of the panel is a display driving mode; and

a touch IC for generating a touch scan signal and supplying the touch scan signal to the plurality of electrodes of the panel when a driving mode of the panel is a touch driving mode,

wherein the gate driver sequentially supplies the gate-on signal to the first to nth gate lines, and then simultaneously supplies the gate-on signal to the first to nth gate lines, and

the data driver supplies the data voltage of the same level to the data lines.

2. The display device of claim 1, wherein the data voltage of the same level is the data voltage of black level.

3. A display device with integrated touch screen, comprising:

a panel including a plurality of electrodes;

a data driver for converting RGB data inputted from a timing controller into a data voltage, and supplying the data voltage to data lines;

a gate driver for sequentially supplying a gate-on signal to first to nth gate lines so as to apply the data voltage to pixels of the panel when a driving mode of the panel is a display driving mode; and

a touch IC for generating a touch scan signal and supplying the touch scan signal to the plurality of electrodes of the panel when a driving mode of the panel is a touch driving mode,

wherein the gate driver sequentially supplies the gate-on signal to the first to nth gate lines, divides the gate lines into at least two groups, and then separately supplies the gate-on signal by group, and

the data driver supplies the data voltage of the same level to the data lines.

4. The display device of claim 3, wherein the gate-on signal is simultaneously supplied to the respective groups.

5. The display device of claim 3, wherein the gate-on signal is separately supplied with time intervals to each of the groups.

6. The display device of claim 3, wherein at least two groups include the first group comprising the odd numbered gate lines, and the second group comprising the even numbered gate lines.

7. The display device of claim 3, wherein at least two groups include the first group comprising the first to (n/2)th gate lines, and the second group comprising the (n/2+1)th to nth gate lines.

8. The display device of claim 3, wherein the data voltage of the same level is the data voltage of black level.

9. A method of driving a display device with integrated touch screen comprising a panel including a plurality of electrodes, a data driver for supplying a data voltage to data lines, a gate driver for supplying a gate-on signal to first to nth gate lines, and a touch IC for applying a touch scan signal to the panel, comprising:

converting RGB data into the data voltage, and supplying the data voltage to the data lines;

when a driving mode of the panel is a display driving mode, sequentially supplying the gate-on signal to first to nth gate lines so as to apply the data voltage to pixels of the panel, simultaneously supplying the gate-on signal to the first to nth gate lines, and supplying the data voltage of the same level to the data lines; and

when a driving mode of the panel is a touch driving mode, generating the touch scan signal and applying the touch scan signal to the plurality of electrodes of the panel.

10. The method of claim 9, wherein the data voltage of the same level is the data voltage of black level.

11. A method of driving a display device with integrated touch screen comprising a panel including a plurality of electrodes, a data driver for supplying a data voltage to data lines, a gate driver for supplying a gate-on signal to first to nth gate lines, and a touch IC for applying a touch scan signal to the panel, comprising:

converting RGB data into the data voltage, and supplying the data voltage to the data lines;

when a driving mode of the panel is a display driving mode, sequentially supplying the gate-on signal to first to nth gate lines so as to apply the data voltage to pixels of the panel, dividing the gate lines into at least two groups, and separately supplying the gate-on signal by group; and

when a driving mode of the panel is a touch driving mode, generating the touch scan signal, and applying the touch scan signal to the plurality of electrodes of the panel.

12. The method of claim 11, wherein the gate-on signal is simultaneously supplied to the respective groups.

13. The method of claim 11, wherein the gate-on signal is separately supplied with time intervals to each of the groups.

14. The method of claim 11, wherein at least two groups include the first group comprising the odd numbered gate lines, and the second group comprising the even numbered gate lines.

15. The method of claim 11, wherein at least two groups include the first group comprising the first to (n/2)th gate lines, and the second group comprising the (n/2+1)th to nth gate lines.

16. The method of claim 11, wherein the data voltage of the same level is the data voltage of black level.