Patent ID: 6037924
Filing Date: 2000-03-14
Classification: G09G

Abstract:
An electro-optical system comprising:a substrate;a signal line drive circuit comprising a first plurality of thin film transistors formed over said substrate;a scanning line drive circuit comprising a second plurality of thin film transistors formed over said substrate; anda threshold value control circuit for controlling a threshold value of each of said second plurality of thin film transistors,wherein each of said second plurality of thin film transistors comprises a source region and a drain region doped with a first conductive type impurity and a region doped with a second conductive type impurity, said first conductive type being opposite to said second conductive type,wherein said threshold value control circuit is connected to said region doped with the second conductive type impurity through a terminal in order to reduce power consumption of said scanning line drive circuit by applying voltage to said terminal.