Patent ID: 6930666

Claim:
A display device including a plurality of pixels and a driver circuit to drive said plurality of pixels, said driver circuit including a level converter circuit formed on an insulating substrate and comprised of MISTFTs (Metal Insulator Semiconductor Thin Film Transistors) having semiconductor layers comprised of polysilicon, said level converter circuit comprising: a pair of a first NMISTFT (N-channel type Metal Insulator Semiconductor Thin Film Transistor) and a first PMISTFT (P-channel type Metal Insulator Semiconductor Thin Film Transistor), each of said first NMISTFT and said first PMISTFT having both a gate terminal thereof and a first terminal thereof coupled to an input terminal for receiving an input pulse via a first capacitance; a pair of a second NMISTFT and a second PMISTFT, each of said second NMISTFT and said second PMISTFT having a second terminal thereof coupled to said input terminal via a second capacitance; a third PMISTFT having a gate terminal thereof coupled to said gate terminals and said first terminals of said first NMISTFT and said first PMISTFT; a third NMISTFT having a gate terminal thereof coupled to said second terminals of said second NMISTFT and said second PMISTFT, a first terminal of said third PMISTFT, a second terminal of said first NMISTFT, and a second terminal of said first PMISTFT being coupled to a high-voltage power supply line, a second terminal of said third NMISTFT, a gate terminal and a first terminal of said second NMISTFT, a gate terminal and a first terminal of said second PMISTFT being coupled to a low-voltage power supply line, and a first junction point between a second terminal of said third PMISTFT and a first terminal of said third NMISTFT being connected to an output terminal of said level converter circuit.