Patent ID: 6069605
Filing Date: 2000-05-30
Classification: G09G

Abstract:
A liquid crystal driving device for driving a plurality of liquid crystal elements arrayed in a matrix by supplying a voltage to a first side of selected ones of the liquid crystal elements and supplying a counter voltage to a second side of the selected ones of the liquid crystal elements, comprising:at least one signal driving means, including means for sequentially sampling and holding video signals, analog buffers to which are applied high potential and low potential supply voltages for buffering sample and hold voltages, and selection means for selecting any output from said analog buffers;supply voltage control means for controlling values of said high potential supply voltage and said low potential supply voltage which are supplied to said analog buffers, and for shifting a range of an output voltage of said analog buffers to one of high potential and low potential based on said counter voltage; andselection control means for controlling the selection by said selection means of any output of said analog buffers in which the output voltage range is shifted by said supply voltage control means.