DISPLAY DEVICE AND CONTROL METHODS THEREFOR

• US 20080088560A1
• Filed: 10/15/2007
• Published: 04/17/2008
• Est. Priority Date: 10/16/2006
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Lee, Jun-pyo, Bae, Jae-sung, Park, Jin-ho
• Granted Patent: US 7,929,001 B2
• Time in Patent Office: Days
• US Class Current: 345/90
• CPC Class Codes: G09G 2300/0447 for multi-domain technique to improve the viewing angle in a liquid crystal display, such as multi-vertical alignment [MVA]
• CPC Class Codes: G09G 2310/061 for resetting or blanking
• CPC Class Codes: G09G 2320/0261 in the context of movement of objects on the screen or movement of the observer relative to the screen
• CPC Class Codes: G09G 3/2025 the sub-frames having all the same time duration
• CPC Class Codes: G09G 3/2081 with combination of amplitude modulation and time modulation space and time error diffusion G09G3/2066
• CPC Class Codes: G09G 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence

Abstract

A display device, includes: a display panel comprising a plurality of pixels; a signal controller which receives an n+k bit first image signal to divide one frame into 2^k number of sub frames and generates a non-image signal according to an upper k most significant bits of the binary code and a second image signal with a lower n bit, of the first image signal in one frame with a predetermined rate; and a data driver which supplies a data voltage selected on the basis of the non-image signal and the second image signal, to the pixels.

Claims

1. A display device comprising:

a display panel comprising a plurality of pixels;

a signal controller which receives an n+k bit binary coded first image signal, divides one frame into 2^k sub frames, and generates a non-image signal from the upper k most significant bits of the binary code and a second image signal from the lower n bits in one frame with a predetermined rate; and

a data driver which supplies the pixels with a data voltage selected on the basis of the non-image signal and the second image signal.

2. The display device according to claim 1, wherein the signal controller generates the second image signal in m+1 of the sub frames if the decimal value of the upper k most significant bits of the binary code is m.

3. The display device according to claim 1, wherein the signal controller generates the second image signal in 2^k−

m number of sub frames if the decimal value of the upper k most significant bits of the binary code is m.

4. The display device according to claim 2, wherein a sub frame displaying the non-image signal in one frame is formed prior to a sub frame displaying the second image signal.

5. The display device according to claim 3, wherein a sub frame displaying the non-image signal in one frame is formed prior to the sub frame displaying the second image signal.

6. The display device according to claim 2, wherein a sub frame displaying the second image signal in one frame is formed prior to a sub frame displaying the non-image signal.

7. The display device according to claim 3, wherein the sub frame displaying the second image signal in one frame is formed prior to a sub frame displaying the non-image signal.

8. The display device according to claim 2, wherein sub frames displaying the non-image signal are consecutively formed.

9. The display device according to claim 3, wherein sub frames displaying the non-image signal are consecutively formed.

10. The display device according to claim 1, wherein the sub frame displaying the non-image signal is represented in black in the display panel.

11. The display device according to claim 1, wherein the sub frame displaying the non-image signal is represented in gray in the display panel.

12. The display device according to claim 1, wherein 60 frames are formed per second.

13. The display device according to claim 1, wherein the display panel further comprises a first substrate, a second substrate and a liquid crystal layer disposed between the first and second substrates, the liquid crystal layer comprising liquid crystal molecules aligned in an optically compensated birefringent (OCB) mode.

14. A method of controlling a display device, comprising:

receiving an n+k bit first image signal in one frame;

dividing one frame into 2^k sub frames and generating a non-image signal formed according to the upper k most significant bits of the binary code in the first image signal and a second image signal from the lower n bits of the first image signal in one frame with a predetermined rate;

forming a data voltage based on the non-image signal and the second image signal; and

forming a plurality of the sub frames in one frame by supplying the data voltage.

15. The method according to claim 14, wherein the forming of the sub frames comprises generating the second image signal in m+1 number of the sub frames if the decimal value of the upper k most significant bits of the binary code is m.

16. The method according to claim 14, wherein the forming of the sub frames comprises generating the second image signal in 2^k−

m number of the sub frames if the decimal value of the upper k most significant bits of the binary code is m.

17. The method according to claim 15, wherein the forming of the sub frames comprises forming a sub frame displaying the non-image signal in one frame prior to a sub frame displaying the second image signal.

18. The method according to claim 15, wherein the forming of the sub frames comprises forming a sub frame displaying the second image signal in one frame prior to a sub frame displaying the non-image signal.

19. The method according to claim 15, wherein the forming of the sub frames comprises forming sub frames displaying the non-image signal consecutively.

20. The method according to claim 14, wherein the sub frame displaying the non-image signal is represented in black or gray in the display panel.

21. The method according to claim 14, wherein 60 frames are formed per second.