Patent ID: 7667682

Claim:
A display comprising a shift register circuit including: a shift register circuit portion including a first circuit portion having a first transistor connected to a first voltage and a second transistor connected to a clock signal line and turned on in response to a first signal and a second circuit portion having a third transistor turned on in response to a clock signal, a fourth transistor connected to said first voltage, a fifth transistor connected between the gate of said third transistor and said first voltage and a sixth transistor connected between the gate of said third transistor and said clock signal line and turned on in response to a second signal providing an ON-state period not overlapping with an ON-state period of said second transistor receiving said first signal thereby supplying said clock signal to the gate of said third transistor; a scanning direction switching circuit portion for switching a scanning direction; and an input signal switching circuit portion for switching said first signal and said second signal supplied to the gate of said second transistor and the gate of said sixth transistor respectively in response to said scanning direction.