Patent ID: 7843221
Filing Date: 2010-11-30
Classification: G09G,G11C

Abstract:
1. A semiconductor device having a buffer circuit formed on an insulating substrate using single-channel type thin film transistors, wherein the buffer circuit has an output stage which comprises first and second thin film transistors connected in series between first and second power sources, and an output terminal potential of the output stage is switched to the potential of the first or second power source in a complementary manner by the input timings of a set signal adapted to control the first thin film transistor and a reset signal adapted to control the second thin film transistor, wherein the buffer circuit has a first input stage whose output terminal potential is switched in a complementary manner by the input timings of the set and reset signals, wherein the buffer circuit has a second input stage whose output terminal potential is switched in a complementary manner by the input timings of the set and reset signals and whose output terminal potential changes in opposite phase with the output terminal potential of the first input stage, and wherein the output terminal potentials of the first and second input stages are used as the set and reset signals of the output stage.