Liquid crystal display with active matrix

Claim 1

An active matrix type liquid crystal display comprising: a plurality of liquid crystal pixels disposed in a matrix form between a pair of plates formed with electrodes, each said liquid crystal pixel including a switching thin film transistor, said liquid crystal pixels being arranged in rows and columns; common drive means for applying a row select signal to a gate of each said switching thin film transistor of said liquid crystal pixels disposed in a same row; and segment drive means for alternately applying as a segment signal, a video signal or a constant bias signal, to a source of each said switching thin film transistor of said liquid crystal pixels disposed in a same column; wherein a row select time in which one row is selected in sequential scanning of rows by said common drive means is divided into a first select time and a second select time following said first select time, and said alternately applied constant bias signal and video signal change synchronously with said first and second select times; wherein said segment signal is said constant bias signal during said first select time, and said segment signal is said video signal during said second select time; and wherein said row select signal applied to the same row in each frame time has a level "1" for selecting the same row, thereafter has a level "0" for at least one row select time, and during each of the following row select time periods, said row select signal repetitively has the level "1" during said first select time and has the level "0" during the second select time for a plurality of first and second select times.