Patent ID: 8319720

Claim:
An active matrix type display device comprising: a substrate; a first thin film transistor formed over the substrate; a pixel electrode electrically connected to the first thin film transistor formed over the substrate; a gate driver circuit operationally connected to a gate electrode of the first thin film transistor, the gate driver circuit including a shift register, wherein the shift register comprises: a second thin film transistor formed over the substrate; a third thin film transistor formed over the substrate wherein one of source and drain regions of the second thin film transistor is electrically connected to one of source and drain regions of the third transistor; and a capacitor electrically connected to the one of the source and drain regions of the second thin film transistor and the one of the source and drain regions of the third thin film transistor, wherein each of the first, second and third thin film transistors has a same conductivity type, and wherein each of the first, second and third thin film transistors is of n-channel type.