DISPLAY DEVICE AND DRIVING METHOD THEREOF

• US 20150161955A1
• Filed: 06/09/2014
• Published: 06/11/2015
• Est. Priority Date: 12/09/2013
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Choi, Deok Jun
• Granted Patent: US 9,361,847 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 3/0412 Digitisers structurally integrated in a display
• 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 3/0446 using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
• CPC Class Codes: G09G 2310/0232 Special driving of display border areas
• CPC Class Codes: G09G 2310/0278 Details of driving circuits arranged to drive both scan and data electrodes
• CPC Class Codes: G09G 2310/08 Details of timing specific for flat panels, other than clock recovery
• CPC Class Codes: G09G 3/2092 Details of a display terminals using a flat panel, the details relating to the control arrangement of the display terminal and to the interfaces thereto suitable for both CRT and flat panel G09G5/003; specific for a CRT G09G1/165
• CPC Class Codes: G09G 3/3677 suitable for active matrices only
• CPC Class Codes: G09G 3/3685 Details of drivers for data electrodes
• CPC Class Codes: G09G 3/3688 suitable for active matrices only
• CPC Class Codes: G09G 3/3696 Generation of voltages supplied to electrode drivers

Abstract

A display device with a signal controller is disclosed. The display device includes a display panel, a scan driver, a data driver, a touch screen including a touch controller, a graphics controller and a signal controller. The signal controller generates a multiple control signal for controlling the timing of recording of an image signal and the timing of driving of the touch screen panel. The signal controller transmits the multiple control signal to the graphics controller and the touch controller.

Claims

1. A display device comprising:

a display panel configured to include a plurality of pixels, a scan driver for applying a scanning signal having a gate-on voltage to a plurality of scan lines connected to the pixels, a data driver for applying a data signal to a plurality of data lines connected to the pixels, and a signal controller for controlling operations of the scan driver and the data driver by receiving an image signal from a graphics controller; and

a touch screen panel configured to include a touch controller for detecting a touch position by receiving a detection signal from a plurality of sensing electrodes,

wherein the signal controller is configured to generate a multiple control signal for controlling timing of recording of the image signal and timing of driving of the touch screen panel, and the signal controller is further configured to transmit the multiple control signal to the graphics controller and the touch controller.

2. The display device of claim 1, wherein the multiple control signal is a waveform switched between a high level voltage and a low level voltage in a frame, and maintained at the high level voltage in a porch period between a plurality of frames.

3. The display device of claim 2, wherein the multiple control signal switches between the high level voltage and the low level voltage by one horizontal period in the frame.

4. The display device of claim 3, wherein the scanning signal is sequentially applied to the scanning lines in a pulse width of the horizontal period.

5. The display device of claim 3, wherein the multiple control signal switches to the low level voltage one horizontal period before the porch period ends.

6. The display device of claim 5, wherein the multiple control signal switches to the high level voltage when the porch period ends.

7. The display device of claim 3, wherein the graphics controller is configured to start a first recording of the image signal after the porch period starts.

8. The display device of claim 7, wherein the first recording time is one horizontal period or more.

9. The display device of claim 3, wherein the touch controller is configured to drive the touch screen panel for a duration after a second recording of the image signal when the multiple control signal switches to the high level voltage in the frame.

10. The display device of claim 9, wherein the second recording time is shorter than one horizontal period.

11. The display device of claim 2, wherein the multiple control signal switches to and maintains the high level voltage a delay time after the frame ends.

12. The display device of claim 11, wherein the touch controller is configured to drive the touch screen panel when the multiple control signal switches to the high level voltage in the frame.

13. The display device of claim 1, wherein the multiple control signal is a waveform switched between a high level voltage and a low level voltage in a frame and until a predetermined time after the frame ends, and maintains the high level voltage in a porch period between a plurality of frames after the predetermined time.

14. The display device of claim 13, wherein the graphics controller is configured to record the image signal when the multiple control signal is maintained at the high level voltage in the porch period.

15. A driving method of a display device including a touch screen panel, the method comprising:

generating a multiple control signal in a waveform switched between a high level voltage and a low level voltage in a frame during which a data signal is applied to a plurality of pixels;

generating the multiple control signal at the high level voltage in a porch period between a plurality of frames;

performing a first recording of an image signal when the porch period starts; and

driving the touch screen panel for a duration after a second recording of the image signal when the multiple control signal switches to the high level voltage in the frame.

16. The driving method of claim 15, wherein the multiple control signal switches between the high level voltage and the low level voltage by one horizontal period in the frame.

17. The driving method of claim 16, wherein the multiple control signal switches to the low level voltage one horizontal period before the porch period ends.

18. The driving method of claim 17, wherein the multiple control signal switches to the high level voltage when the porch period ends.

19. The driving method of claim 15, wherein the first recording time is one horizontal period or more.

20. The driving method of claim 15, wherein the second recording time is shorter than one horizontal period.