(19)
(11) EP 1 622 123 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
06.05.2009 Bulletin 2009/19

(43) Date of publication A2:
01.02.2006 Bulletin 2006/05

(21) Application number: 05300521.1

(22) Date of filing: 28.06.2005
(51) International Patent Classification (IPC): 
G09G 3/20(2006.01)
G09G 3/36(2006.01)
 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 MC NL PL PT RO SE SI SK TR
Designated Extension States:
AL BA HR LV MK YU

(30) Priority: 28.07.2004 EP 04017851

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

(72) Inventors:
  • Schwanenberger, Thomas
    78112 St. Georgen (DE)
  • Schemmann, Heinrich
    78052 Villingen-Schwenningen (DE)
  • Marx, Thilo
    78052 Villingen-Schwenningen (DE)

(74) Representative: Rossmanith, Manfred 
Deutsche Thomson OHG European Patent Operations Karl-Wiechert-Allee 74
30625 Hannover
30625 Hannover (DE)

   


(54) Display device driving circuit


(57) A driving circuit for a display with display elements in rows and/or columns has a shift register, through which tokens are shifted. The shift register's parallel outputs are latched and enable switch cells depending on the tokens. Control signals are supplied to the switch cells which control the output signal in terms of pulse width and/or signal shape. Buffers output the signals to a connected display. Individual or groups of buffers are connected to different supply voltages. The shift register may have more than one input in order to allow for shifting tokens in parallel, e.g. to every second output, using only one clock cycle. Further, inputs are provided for inverting the travelling direction of the tokens, inverting the shape of the signal that is output or switching all outputs to a predetermined state.







Search report