Driving apparatus for plasma display panel and gray level...

Details Driving apparatus for plasma display panel and gray level... Driving apparatus for plasma display panel and gray level...

2006-07-11

2006-07-11

Dinh, Trinh (Department: 2821)

Electric lamp and discharge devices: systems

Plural power supplies

Plural cathode and/or anode load device

C345S060000, C345S063000, C345S068000, C315S169300

Reexamination Certificate

active

07075243

ABSTRACT:
A PDP driving apparatus and a gray level expressing method thereof that improves the expression of the gray level and reduces pseudo-contour. The average signal level of one frame data of an input image signal is calculated to determine a sustain pulse number, and an inverse gamma correction gray level corresponding to the sustain pulse numbers is expressed with reference to inverse gamma correction tables selected according thereto. The sustain pulse numbers determined according to the signal level are divided into a plurality of groups, and then are converted to the subfields depending on the sustain pulse numbers corresponding to the respective groups. In that situation, the sustain pulse numbers at the subfields corresponding to the respective groups are different from each other.

REFERENCES:
patent: 6100863 (2000-08-01), Zhu
patent: 6965358 (2005-11-01), Kasahara et al.
patent: 2002/0190927 (2002-12-01), Shoji et al.
patent: 2003/0048242 (2003-03-01), Jeong et al.
patent: 2003/0058476 (2003-03-01), Kwon et al.
patent: 2003/0151565 (2003-08-01), Kim et al.

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