(19)
(11) EP 1 887 549 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
18.03.2009 Bulletin 2009/12

(43) Date of publication A2:
13.02.2008 Bulletin 2008/07

(21) Application number: 07111202.3

(22) Date of filing: 27.06.2007
(51) International Patent Classification (IPC): 
G09G 3/32(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 MT NL PL PT RO SE SI SK TR
Designated Extension States:
AL BA HR MK RS

(30) Priority: 30.06.2006 EP 06300742

(71) Applicant: Thomson Licensing
92100 Boulogne-Billancourt (FR)

(72) Inventors:
  • Weitbruch, Sébastien
    92648 Boulogne Cedex (FR)
  • Correa, Carlos
    92648 Boulogne Cedex (FR)
  • Thebault, Cédric
    92648 Boulogne Cedex (FR)

(74) Representative: Le Dantec, Claude 
46, Quai Alphonse Le Gallo
92100 Boulogne-Billancourt
92100 Boulogne-Billancourt (FR)

   


(54) Method and apparatus for driving an amoled with variable driving voltage


(57) The sharpness impression when displaying a movement on an AMOLED (Active Matrix Organic Light Emitting Display) shall be improved. For this purpose, an apparatus for driving a cell of an AMOLED is provided including driving means (14, 16) for applying a driving voltage to the cell and for applying a luminance control signal to the cell during a pregiven time frame. The apparatus further includes controlling means (17, 18) for varying the driving voltage within the time frame according to a predefined function of time. For example, the driving voltage may be varied in the form of a triangle so that the lighting time over the frame is reduced while a CRT like behavior is emulated.







Search report