(19)
(11) EP 1 821 277 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
17.02.2010 Bulletin 2010/07

(43) Date of publication A2:
22.08.2007 Bulletin 2007/34

(21) Application number: 07102607.4

(22) Date of filing: 19.02.2007
(51) International Patent Classification (IPC): 
G09G 3/28(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
Designated Extension States:
AL BA HR MK RS

(30) Priority: 20.02.2006 EP 06290293

(71) Applicant: Thomson Licensing
92443 Issy-les-Moulineaux Cedex (FR)

(72) Inventors:
  • Thebault, Cédric
    92648 BOULOGNE CEDEX (FR)
  • Correa, Carlos
    92648 BOULOGNE CEDEX (FR)
  • Weitbruch, Sébastien
    92648 BOULOGNE CEDEX (FR)

(74) Representative: Le Dantec, Claude 
Thomson European Patent Operations 46 Quai Alphonse Le Gallo
92648 Boulogne-Billancourt
92648 Boulogne-Billancourt (FR)

   


(54) Method for driving plasma display panel with attenuation estimation and compensation and corresponding apparatus


(57) The picture quality on a plasma display panel shall be improved when the contrast and/or the brightness are reduced. This is achieved by estimating the reduction of the dynamic occurring in the front-end (2) of the data processing of the plasma display device and by compensating it in the back-end (3). Specifically, the gain and/or offset of the video input data are adjusted (5) and the power level of the adjusted video data is measured (10). The resulting power level information is updated (13) on the basis of an attenuation information (12). The updated power level is used for the power management (9) and the level of the video data being reduced (5) in the front-end (2) is increased (14) on the basis of the attenuation information. Thus, the dynamic of the video and, as a result, the picture quality are improved.







Search report