(19)
(11) EP 1 335 341 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
30.06.2004 Bulletin 2004/27

(43) Date of publication A2:
13.08.2003 Bulletin 2003/33

(21) Application number: 03000172.1

(22) Date of filing: 07.01.2003
(51) International Patent Classification (IPC)7: G09G 3/28
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT SE SI SK TR
Designated Extension States:
AL LT LV MK RO

(30) Priority: 16.01.2002 EP 02000946

(71) Applicant: DEUTSCHE THOMSON-BRANDT GMBH
78048 Villingen-Schwenningen (DE)

(72) Inventors:
  • Weiterbruch, Sebastian
    78087 Monchweiler (DE)
  • Thebault, Cédric
    93270 Sevran (FR)
  • Goetzke, Axel
    78052 VS-Obereschach (DE)

(74) Representative: Berthier, Karine 
THOMSON, European Patent Operations, 46 Quai Alphonse Le Gallo
92648 Boulogne Cédex
92648 Boulogne Cédex (FR)

   


(54) Method and apparatus for processing video pictures


(57) The present invention relates to a method for processing video signals for display on a display panel comprising a matrix array of cells which could only be "ON" or "OFF", wherein the time duration of a video field is divided into N sub-fields during which the cells can be activated, each sub-field comprising at least an addressing period and a sustaining period, the duration of which corresponding to the weight associated with said sub-field, said method comprising at least a priming period, characterized in that the position of the priming period is determined as follows :
  • determination of a sustain threshold value D for a given addressing speed and panel technology,
  • calculation of the number of sustain pulses in each sub-field n, n being such that 1 ≤ n < N,
  • if the number of sustain pulses is above or equal to D, addition of a priming pulse before at least the sub-field n + 1.

This method is mainly applicable to plasma display panel.






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