Patent ID: 7102606

Claim:
An active matrix type display device comprising: a plurality of gate lines; a plurality of data lines crossing said plurality of gate lines; a plurality of pixel electrodes; a thin film transistor disposed at each intersection between said plurality of gate lines and said plurality of data lines, and including a gate electrode and an active region, said gate electrode being connected to one of said plurality of gate lines, and said active region having a first region connected to one of said plurality of data lines and a second region connected to a corresponding one of said plurality of pixel electrodes; and a gate line driver for sequentially applying a gate selection signal with a pulse- shaped voltage waveform to a selected one of said plurality of gate lines; wherein said gate line driver causes a falling edge of said gate selection signal with said pulse-shaped voltage waveform to be smoother than a rising edge thereof; wherein said gate selection signal requires at least a time t/2 and shorter than t to fall, where t is the time from when a first gate line assumes an unselected state to when subsequent second gate line assumed a selected state.