An active matrix type liquid crystal display (LCD) having a thin film transistor for each liquid crystal cell, capable of decreasing attenuation off a video signal in each pixel. The active matrix type LCD has a number of liquid crystal pixels disposed in a matrix form each having a switching thin film transistor, a common drive unit for applying a row select signal to the gate of each of the switching thin film transistors of the liquid crystal pixels on the same row, and a segment drive unit for selectively applying one of the video signal and a constant bias signal to the source of each of the switching thin film transistors of the liquid crystal pixels on the same column.