Driving apparatus for plasma display panel and gray level expressing method thereof
US7075243B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 14, 2004 |
| Grant date | Jul 11, 2006 |
| Priority date | — |
| Expiry date | Oct 14, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2360/16
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.