METHOD OF DRIVING A DISPLAY PANEL, DISPLAY PANEL DRIVING APPARATUS FOR PERFORMING THE METHOD AND DISPLAY APPARATUS HAVING THE DISPLAY PANEL DRIVING APPARATUS

• US 20140071066A1
• Filed: 01/10/2013
• Published: 03/13/2014
• Est. Priority Date: 09/10/2012
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: LEE, Il-Ho, HWANG, Seong-Mo, KIM, In-Cheol, PARK, Ji-Hong, CHOI, Moon-Sung, NAM, Seung-Ho
• Granted Patent: US 9,128,561 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 3/04166 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 3/04184 Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally
• CPC Class Codes: G06F 3/044 by capacitive means
• CPC Class Codes: G06F 3/0443 using a single layer of sensing electrodes
• 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

Abstract

A display panel driving apparatus a data driving part which applies a first data signal to a data line corresponding to a first area of the display panel during a first sub frame period of a frame period and applies a second data signal to a data line corresponding to a second area of the display panel during a second sub frame period of the frame period, and a touch driving part which applies a touch driving signal to a touch driving line of the display panel during a first blank period next to the first sub frame period and applies the touch driving signal to the touch driving line during a second blank period next to the second sub frame period and included in the frame period.

Claims

1. A method of driving a display panel, the method comprising:

applying a first data signal to a data line corresponding to a first area of the display panel during a first sub frame period of a frame period;

applying a touch driving signal to a touch driving line of the display panel during a first blank period of the frame period, wherein the first blank period is next to the first sub frame period;

applying a second data signal to a data line corresponding to a second area of the display panel during a second sub frame period of the frame period, wherein the second sub frame period is next to the first blank period; and

applying the touch driving signal to the touch driving line during a second blank period of the frame period, wherein the second blank period is next to the second sub frame period.

2. The method of claim 1, wherein

the applying the touch driving signal to the touch driving line during the first blank period comprises sequentially applying the touch driving signal to first to N-th touch driving lines, wherein N is a natural number, and

the applying the touch driving signal to the touch driving line during the second blank period comprises sequentially applying the touch driving signal to the first to N-th touch driving lines.

3. The method of claim 1, wherein

the first area and the second area is determined based on a number of gate lines disposed therein,

a first gate signal is applied to a gate line disposed in the first area during the first sub frame period, and

a second gate signal is applied to a gate line disposed in the second area during the second sub frame period.

4. The method of claim 1, wherein the touch driving signal comprises a plurality of pulses.

5. The method of claim 1, further comprising:

applying a third data signal to a data line corresponding to a third area of the display panel during a third sub frame period of the frame period, wherein the third sub frame period is next to the second blank period; and

applying the touch driving signal to the touch driving line during a third blank period of the frame period, wherein the third blank period is next to the third sub frame period.

6. The method of claim 1, wherein the frame period comprises A sub frame periods and A blank periods respectively next to the A sub frame periods, wherein A is a natural number greater or equal to 2.

7. The method of claim 6, wherein

the display panel comprises A areas,

a data signal is applied to a data line corresponding to the A areas during the A sub frame periods, and

the touch driving signal is applied to the touch driving line during the A blank periods.

8. A display panel driving apparatus comprising:

a data driving part which applies a first data signal to a data line corresponding to a first area of a display panel during a first sub frame period of a frame period and applies a second data signal to a data line corresponding to a second area of the display panel during a second sub frame period of the frame period; and

a touch driving part which applies a touch driving signal to a touch driving line of the display panel during a first blank period next to the first sub frame period and applies the touch driving signal to the touch driving line during a second blank period next to the second sub frame period and included in the frame period.

9. The display panel driving apparatus of claim 8, wherein

the touch driving part sequentially applies the touch driving signal to first to N-th touch driving lines during the first blank period, and sequentially applies the touch driving signal to the first to N-th touch driving lines during the second blank period, wherein N is a natural number.

10. The display panel driving apparatus of claim 8, further comprising:

a gate driving part which applies a first gate signal to a gate line disposed in the first area during the first sub frame period and applies a second gate signal to a gate line disposed in the second area during the second sub frame period,

wherein each of the first area and the second area of the display panel is determined based on a number of gate lines in the display panel.

11. The display panel driving apparatus of claim 8, wherein the touch driving signal comprises a plurality of pulses.

12. The display panel driving apparatus of claim 8, wherein

the data driving part applies a third data signal to a data line corresponding to a third area of the display panel during a third sub frame period next to the second blank period and included in the frame period, and

the touch driving part applies the touch driving signal to the touch driving line during a third blank period next to the third sub frame period and included in the frame period.

13. The display panel driving apparatus of claim 8, wherein

the frame period comprises A sub frame periods and A blank periods respectively next to the A sub frame periods, wherein A is a natural number greater or equal to 2.

14. The display panel driving apparatus of claim 13, wherein

the display panel comprises A areas,

the data driving part applies a data signal to a data line corresponding to the A areas during the A sub frame periods, and

the touch driving part applies the touch driving signal to the touch driving line during each of the A blank periods.

15. A display apparatus comprising:

a display panel which displays an image; and

a display panel driving apparatus comprising;

a data driving part which applies a first data signal to a data line corresponding to a first area of the display panel during a first sub frame period of a frame period and applies a second data signal to a data line corresponding to a second area of the display panel during a second sub frame period of the frame period; and

a touch driving part which applies a touch driving signal to a touch driving line of the display panel during a first blank period next to the first sub frame period and applies the touch driving signal to the touch driving line during a second blank period next to the second sub frame period, wherein the second blank period is in the frame period.

16. The display apparatus of claim 15, wherein a signal line in the display panel operates as the touch driving line.

17. The display apparatus of claim 16, wherein at least one of a common electrode and a gate line operates as the touch driving line.

18. The display apparatus of claim 15, wherein

the display panel further comprises a touch sense line,

the touch sense line and the touch driving line form a capacitance, and

a signal line in the display panel operates as the touch sense line.

19. The display apparatus of claim 18, wherein at least one of a common electrode and a data line operates as the touch sense line.

20. The display apparatus of claim 15, wherein

the frame period comprises A sub frame periods and A blank periods respectively next to the A sub frame periods, wherein A is a natural number greater or equal to 2,

the display panel comprises A areas,

the data driving part applies a data signal to a data line corresponding to one of the A areas during a corresponding sub frame period of the A sub frame periods, and

the touch driving part applies the touch driving signal to the touch driving line during each of the A blank periods.