Patent ID: 6118423
Filing Date: 2000-09-12
Classification: G09G

Abstract:
A circuit for generating a series of LCD bias signals, said circuit comprising:a variable reference voltage source outputting a variable reference voltage (V.sub.REF);a first component receiving said variable reference voltage and generating a third LCD bias voltage (V.sub.LCD3) dependent on said variable reference voltage and between said supply voltage (V.sub.DD) and a fifth LCD bias voltage (V.sub.LCD5);a second component generating a fourth LCD bias voltage (V.sub.LCD4) having a magnitude equal to (V.sub.LCD3 -V.sub.LCD5)/2+V.sub.LCD5 ;a third component generating a second LCD bias voltage (V.sub.LCD2) having a magnitude equal to V.sub.DD -(V.sub.LCD3 -V.sub.LCD5); anda fourth component generating a first LCD bias voltage (V.sub.LCD1) having a magnitude equal to (V.sub.LCD2 -V.sub.DD)/2+V.sub.DD.