EP 1258859 A1 20021120 - Method for a segmented inverse gamma correction for a plasma display panel
Title (en)
Method for a segmented inverse gamma correction for a plasma display panel
Title (de)
Verfahren zur segmentierten invertierten Gammakorrektur für eine Plasmaanzeigetafel
Title (fr)
Procédé segmenté pour correction inverse de gamma pour un panneau d'affichage à plasma
Publication
Application
Priority
EP 01112260 A 20010518
Abstract (en)
A process of effecting various anti compensation processes on input image on a plasma display panel comprises the steps of a) performing a gamma (i.e., gamma equal to 0.45) compensation process on a video signal received by the PDP with respect to a gamma ; b) dividing the video signal into at least two segments based on a gray level thereof; and c) performing a variety of anti compensation processes on the video signal in respective segment. A smaller gamma is used in the anti compensation process with respect to the video signal in a range of low gray level for increasing the gray level in the range of low gray level. Similarly, a larger gamma is used in the anti compensation process with respect to the video signal in a range of high gray level for increasing a gradient in the range of high gray level, thereby obtaining a sharp image contrast, improving image quality, and rendering an enhanced image brightness. <IMAGE>
IPC 1-7
IPC 8 full level
CPC (source: EP)
G09G 3/2007 (2013.01); G09G 3/28 (2013.01); G09G 2320/0271 (2013.01); G09G 2320/0276 (2013.01)
Citation (applicant)
- JP H06311394 A 19941104 - FUJITSU GENERAL LTD
- JP H08317250 A 19961129 - FUJITSU GENERAL LTD
Citation (search report)
- [X] EP 0947975 A1 19991006 - HITACHI LTD [JP], et al
- [A] EP 0831643 A2 19980325 - MATSUSHITA ELECTRIC IND CO LTD [JP], et al
Designated contracting state (EPC)
DE FR GB IT NL
DOCDB simple family (publication)
DOCDB simple family (application)
EP 01112260 A 20010518