Plasma display apparatus and method of driving the same

Abstract

A plasma display apparatus and a method of driving the same are disclosed. The plasma display apparatus includes a plasma display panel, a driver that supplies a driving voltage to the plasma display panel, and a controller. After a luminance difference between a first area and a second area of the plasma display panel is maintained at a first luminance difference for a predetermined period of time, the controller compensates for a luminance of at least one of the first area or the second area when video data of an equal gray level is input in the first area and the second area.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The accompany drawings, which are included to provide a further understanding of the invention and are incorporated on and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention.

FIG. 1 illustrates a plasma display apparatus according to one embodiment;

FIG. 2 illustrates a configuration of a plasma display panel according to one embodiment;

FIG. 3 illustrates an example of a method for representing a gray level of an image in the plasma display panel according to one embodiment;

FIG. 4 illustrates a driving waveform in the plasma display panel according to one embodiment;

FIGS. 5 a and 5b are block diagrams of a controller of the plasma display apparatus according to one embodiment;

FIG. 6 is a flow chart of a method for compensating for image retention in the plasma display apparatus according to one embodiment;

FIGS. 7 a and 7b illustrate a process for compensating for bright image retention in the plasma display apparatus according to one embodiment;

FIGS. 8 a and 8b illustrate a process for compensating for dark image retention in the plasma display apparatus according to one embodiment;

FIGS. 9 a and 9b illustrate a relationship between video data and screen luminance in the processes for compensating for the bright image retention and the dark image retention; and

FIGS. 10 a and 10b illustrate a driving method for compensating for the bright image retention and the dark image retention in the plasma display apparatus according to one embodiment.

Claims

1. A plasma display apparatus comprising: a plasma display panel;a driver that supplies a driving voltage to the plasma display panel; anda controller that after a luminance difference between a first area and a second area of the plasma display panel is maintained at a first luminance difference for a predetermined period of time, compensates for a luminance of at least one of the first area or the second area when video data of an equal gray level is input in the first area and the second area.

2. The plasma display apparatus of claim 1, wherein after the luminance difference between the first area and the second area is maintained at the first luminance difference for the predetermined period of time, the controller compensates for the luminance of at least one of the first area or the second area when a gray level of video data in the second area changes to be less than a difference between a gray level of video data in the first area and the gray level of the video data in the second area.

3. The plasma display apparatus of claim 2, wherein the controller compensates for the luminance of at least one of the first area or the second area by controlling the gray level of at least one of the first area or the second area.

4. The plasma display apparatus of claim 2, wherein the controller compensates for the luminance of at least one of the first area or the second area by controlling the number of ON subfields in at least one of the first area or the second area.

5. The plasma display apparatus of claim 2, wherein after the luminance of at least one of the first area or the second area is compensated for, the first area or the second area has a compensated luminance different from a luminance of the first area or the second area corresponding to the video data input from the outside.

6. The plasma display apparatus of claim 2, wherein after the luminance difference between the first area and the second area is maintained at the first luminance difference for the predetermined period of time, the controller compensates for the luminance of the second area when the gray level of the video data in the second area increases.

7. The plasma display apparatus of claim 6, wherein the controller reduces the luminance of the second area when the gray level of the video data in the second area increases.

8. The plasma display apparatus of claim 2, wherein after the luminance difference between the first area and the second area is maintained at the first luminance difference for the predetermined period of time, the controller compensates for the luminance of the first area when the gray level of the video data in the second area decreases.

9. The plasma display apparatus of claim 8, wherein the controller increases the luminance of the first area when the gray level of the video data in the second area decreases.

10. The plasma display apparatus of claim 4, wherein after the luminance difference between the first area and the second area is maintained at the first luminance difference for the predetermined period of time, a weight of a sustain pulse corresponding to the gray level of the video data in the first area is different from a weight of a sustain pulse corresponding to the gray level of the video data in the second area when the video data of the equal gray level is input in the first area and the second area.

11. A method of driving a plasma display apparatus comprising: after a luminance difference between a first area and a second area of a plasma display panel is maintained at a first luminance difference for a predetermined period of time, compensating for a luminance of at least one of the first area or the second area when video data of an equal gray level is input in the first area and the second area.

12. The method of claim 11, wherein after the luminance difference between the first area and the second area is maintained at the first luminance difference for the predetermined period of time, the luminance of at least one of the first area or the second area is compensated for when a gray level of video data in the second area changes to be less than a difference between a gray level of video data in the first area and the gray level of the video data in the second area.

13. The method of claim 12, wherein the luminance of at least one of the first area or the second area is compensated for by controlling the gray level of at least one of the first area or the second area.

14. The method of claim 12, wherein the luminance of at least one of the first area or the second area is compensated for by controlling the number of ON subfields in at least one of the first area or the second area.

15. The method of claim 12, wherein after the luminance of at least one of the first area or the second area is compensated for, the first area or the second area has a compensated luminance different from a luminance of the first area or the second area corresponding to the video data input from the outside.

16. The method of claim 12, wherein after the luminance difference between the first area and the second area is maintained at the first luminance difference for the predetermined period of time, the luminance of the second area is compensated for when the gray level of the video data in the second area increases.

17. The method of claim 16, wherein the luminance of the second area decreases when the gray level of the video data in the second area increases.

18. The method of claim 12, wherein after the luminance difference between the first area and the second area is maintained at the first luminance difference for the predetermined period of time, the luminance of the first area is compensated for when the gray level of the video data in the second area decreases.

19. The method of claim 18, wherein the luminance of the first area increases when the gray level of the video data in the second area decreases.

20. The method of claim 14, wherein after the luminance difference between the first area and the second area is maintained at the first luminance difference for the predetermined period of time, a weight of a sustain pulse corresponding to the gray level of the video data in the first area is different from a weight of a sustain pulse corresponding to the gray level of the video data in the second area when the video data of the equal gray level is input in the first area and the second area.