ELECTRO-OPTIC DEVICE

摘要

PROBLEM TO BE SOLVED: To achieve a gradation display with 256 steps or more by pure digital control, by providing this device with an inverter consisting of each specific NTFT(N-channel Thin Film Transistor) and PTFT. SOLUTION: An active matrix circuit uses an inverter circuit where an NTFT and a PTFT operate complementarily. Gate electrodes of NTFT and PTFT are connected with a signal line Xn, and one or the other of a source or a drain is connected with a picture element Zn,m, and the other is connected with signal lines -Ym, Ym. And NTFT has a channel area, a semiconductor layer provided with plural N-type impurity area, a gate insulating film provided thereon, and a gate electrode provided further thereon and superimposing at least one of the Ntype impurity. And PTFT has the channel area, the semiconductor layer provided with plural N-type impurity area, the gate insulating film provided thereon, and the gate electrode provided thereon.