Display device integrated with touch screen

Patent metadata

Field	Value
Publication number	US-9658718-B2
Application number	US-201414582857-A
Country	US
Kind code	B2
Filing date	Dec 24, 2014
Priority date	Jun 30, 2014
Publication date	May 23, 2017
Grant date	May 23, 2017

Abstract

A display device integrated with a touch screen and a method for driving the same are disclosed, in which parasitic capacitance is prevented from being generated. The display device comprises a panel including a plurality of electrodes; a rear resistance film provided on the plurality of electrodes of the panel; a touch integrated circuit (IC) applying a touch driving signal to the plurality of electrodes when a driving mode of the panel is a touch driving mode; and a gate driver sequentially applying scan signals to the plurality of gate lines and a data driver applying a data voltage to the plurality of data lines, when the driving mode of the panel is a display driving mode, wherein the touch driving signal or a signal corresponding to the touch driving signal is applied to the rear resistance film when the driving mode of the panel is the touch driving mode.

First claim

What is claimed is:

1. A display device integrated with a touch screen, the display device comprising:
a panel including a plurality of gate lines, a plurality of data lines, and a plurality of electrodes;
a rear resistance film provided on the plurality of electrodes of the panel to reduce a parasitic capacitance between the rear resistance film and the plurality of electrodes;
a touch integrated circuit (IC) applying a touch driving signal to the plurality of electrodes if a driving mode of the panel is a touch driving mode; and
a gate driver sequentially applying scan signals to the plurality of gate lines and a data driver applying a data voltage to the plurality of data lines when the driving mode of the panel is a display driving mode,
wherein the touch driving signal or a signal corresponding to the touch driving signal generated in the touch IC is applied to the rear resistance film, the plurality of gate lines, and the plurality of data lines when the driving mode of the panel is the touch driving mode.

2. The display device of claim 1 , wherein the signal corresponding to the touch driving signal is a signal of a same phase as that of the touch driving signal.

3. The display device of claim 1 , wherein the signal corresponding to the touch driving signal is a signal modulated to a pulse of a same size as that of the touch driving signal.

4. The display device of claim 1 , wherein the touch driving signal or the signal corresponding to the touch driving signal is applied to the rear resistance film through the touch IC.

5. The display device of claim 1 , further comprising a pulse generator generating the touch driving signal or the signal corresponding to the touch driving signal.

6. The display device of claim 5 , wherein the pulse generator is provided outside the gate driver, the data driver and the touch IC.

7. The display device of claim 5 , wherein the pulse generator is provided inside the gate driver or the data driver, or is provided inside the touch IC.

8. The display device of claim 1 , wherein the rear resistance film is an indium tin oxide (ITO) film.

9. The display device of claim 1 , wherein at least one signal line connected to each of the plurality of electrodes, transmitting the touch driving signal is provided in the panel in a direction of the data lines.

10. The display device of claim 9 , wherein the at least one signal line is connected with each of the plurality of electrodes through at least two contact holes.

11. The display device of claim 1 , wherein the gate driver applies the touch driving signal or the signal corresponding to the touch driving signal to the plurality of gate lines when the driving mode of the panel is the touch driving mode.

12. The display device of claim 1 , wherein the data driver applies the touch driving signal or the signal corresponding to the touch driving signal to the plurality of data lines when the driving mode of the panel is the touch driving mode.

13. The display device of claim 1 , wherein the touch IC is provided inside the data driver.

14. The display device of claim 1 , wherein the touch IC is provided outside the data driver or the gate driver.

15. The display device of claim 1 , wherein the plurality of electrodes are driven as touch electrodes for sensing a touch input of the panel in accordance with the applied touch driving signal when the driving mode of the panel is the touch driving mode, and the plurality of electrodes are driven as common electrodes for generating electric field together with a pixel electrode provided in the panel in accordance with a common voltage, which is applied, and displaying images, when the driving mode of the panel is the display driving mode.

16. The display device of claim 1 , wherein the rear resistance film is formed to adjoin an upper portion of a color filter (CF) substrate constituting the panel.

17. The display device of claim 1 , wherein the rear resistance film is formed by AS Pol and Y1 Coating.

18. The display device of claim 1 , wherein the rear resistance film additionally reduces a parasitic capacitance between the rear resistance film and a touch input. the display driving mode.

Assignees

• Lg Display Co Ltd

Inventors

• Choi Su Min
• Kwon Keuk Sang
• Park Seung Chul

Classifications

• G06F3/044

  by capacitive means · CPC title

• G06F3/0412 Primary

  Digitisers structurally integrated in a display · CPC title

• G06F3/0418 Primary

  for error correction or compensation, e.g. based on parallax, calibration or alignment · CPC title

• G06F3/04184 Primary

  Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally · CPC title

• G09G3/3648

  using an active matrix (G09G3/367 - G09G3/3696 take precedence) · CPC title