Patent ID: 6084580
Filing Date: 2000-07-04
Classification: G09G

Abstract:
A voltage generating circuit for supplying a voltage to a display device having a capacitive element, comprising:an output terminal connected to said display device;two input terminals to which voltages V.sub.a and V.sub.b are input, respectively;a switch, provided between said output terminal and said input terminals, for switching a state between first and second states;a capacitor provided between said switch and said output terminal; anda rectifying element connected to said capacitor in parallel,wherein, when said switch is in the first state, the voltage V.sub.a is output from said output terminal, and said capacitor is charged,when said switch is in the second state, a sum voltage V.sub.d of a voltage V.sub.c charged on said capacitor and one of the voltages V.sub.a and V.sub.b input from said input terminals is output from said output terminal,V.sub.a and V.sub.d have same polarity with respect to a reference voltage,.vertline.V.sub.a .vertline.<.vertline.V.sub.d .vertline., and.vertline.V.sub.b .vertline.<.vertline.V.sub.d .vertline.