Patent ID: 6480179
Filing Date: 2002-11-12
Classification: G09G,H01L

Abstract:
An image display device comprising an image display section including an insulating substrate having a matrix of pixels formed on an inner surface thereof and a liquid crystal layer sandwiched between said insulating substrate and a substrate opposing said insulating substrate comprising:a plurality of signal lines; a plurality of driver circuits for driving said matrix of pixels via said plurality of signal lines; a plurality of voltage amplifiers formed by polycrystalline semiconductor TFTs and each coupled between one of said plurality of signal lines and a corresponding one of said plurality of driver circuits; said plurality of signal lines, said plurality of driver circuits and said plurality of voltage amplifiers being formed on a surface of said insulating substrate on a side thereof facing said liquid crystal layer, wherein a channel, a source and a drain of said polycrystalline semiconductor TFTs each are formed of a polycrystalline semiconductor film, a gate insulating film and a gate electrode are superposed on said polycrystalline semiconductor film in the order named, and said polycrystalline semiconductor TFTs are provided with a second region of said channel having a threshold voltage higher than a threshold voltage of a first region of said channel on a drain side thereof.