Low-Power a-IGZO TFT Emission Driver With Shoot-Through Current-Free QB Control Block

This paper proposes an emission driver for active-matrix organic light emitting diode (AMOLED) displays using amorphous indium-gallium-zinc-oxide thin-film transistors (a-IGZO TFTs). The proposed circuit effectively eliminates shoot-through current in QB control block, achieving 97% reduction in power consumption compared to conventional one. It stably operates in both depletion and enhancement modes and supports pulse-width modulation (PWM) driving for better low gray level expression of AMOLED displays. Simulation results show that the proposed circuit has the robust performance for high-resolution AMOLED displays.