EP 1949359 B1 20100317 - CIRCUIT FOR PRODUCING A VARIABLE BIAS FOR AN LCD DISPLAY UNIT
Title (en)
CIRCUIT FOR PRODUCING A VARIABLE BIAS FOR AN LCD DISPLAY UNIT
Title (de)
SCHALTUNG ZUR ERZEUGUNG EINER VERÄNDERBAREN VORSPANNUNG FÜR EINE LCD-ANZEIGEEINHEIT
Title (fr)
CIRCUIT DE RÉALISATION D'UNE POLARISATION VARIABLE POUR UNITÉ D'AFFICHAGE LCD
Publication
Application
Priority
- EP 2006063629 W 20060628
- DE 102005055149 A 20051118
Abstract (en)
[origin: WO2007057236A1] The invention relates to a circuit for producing a variable bias, in particular for an LCD display unit, wherein the circuit is connected on the input side to a positive DC voltage source (U+) and to a ground potential (M), has an output connection (U<SUB>LCD</SUB>), to which the LCD display unit can be connected, comprises a first controllable switching element (S1), which is connected with a first switching contact, via a first resistor (R1), to the positive DC voltage source (U+), wherein the output of a pulse-width-modulation controller (PWM) is connected to the control contact of the first switching element (S1), a second switching contact of the first switching element (S1) is connected to a negative DC voltage source (U-) via a second resistor (R2), an impedance converter circuit is provided, which is connected on the input side to the second switching contact of the first switching element (S1) and the negative DC voltage source (U-) and is connected on the output side to the output connection (U<SUB>LCD</SUB>).
IPC 8 full level
G09G 3/36 (2006.01); G02F 1/133 (2006.01)
CPC (source: EP)
G09G 3/3696 (2013.01); G09G 2320/066 (2013.01); G09G 2330/02 (2013.01)
Designated contracting state (EPC)
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
DOCDB simple family (publication)
WO 2007057236 A1 20070524; AT E461512 T1 20100415; DE 102005055149 A1 20070531; DE 502006006471 D1 20100429; EP 1949359 A1 20080730; EP 1949359 B1 20100317
DOCDB simple family (application)
EP 2006063629 W 20060628; AT 06763925 T 20060628; DE 102005055149 A 20051118; DE 502006006471 T 20060628; EP 06763925 A 20060628