Patent ID: 6801181
Filing Date: 2004-10-05
Classification: G09G

Abstract:
A level shifter for changing the level of an input signal and outputting the signal, comprising:a first transistor, a second transistor, and a third transistor which are connected in series between a first power supply and a second power supply; and a fourth transistor, a fifth transistor, and a sixth transistor which are connected in series between said first power supply and said second power supply; said first transistor and said forth transistor being transistors of a first conductivity type, and said second transistor, said third transistor, said fifth transistor, and said sixth transistor being transistors of a second conductivity type, wherein, of a pair of input signals having complementary phases, one input signal is input to a gate of said first transistor and a gate of said second transistor, and the other input signal is input to a gate of said fourth transistor and a gate of said fifth transistor, a node between said first transistor and said second transistor is connected to a gate of said sixth transistor, and a node between said fourth transistor and said fifth transistor is connected to a gate of said third transistor, and an output signal is output from a node between said fourth and fifth transistors, said output signal being used for level shifting of gate lines for selecting a pixel in an active matrix type crystal-display apparatus.