Dynamic-effect compensating technique for stable a-Si:H AMOLED displays

A reliable driving scheme that can compensate for temporal instability of hydrogenated amorphous silicon (a-Si:H) backplane and OLED degradation is a prerequisite for the operation of a-Si:H AMOLED displays. In particular, for large-area and high-resolution displays, the technique should be accurate and fast. Although several driving schemes have been proposed to compensate for the static effect of the V_T-shift, they are prone to the dynamic effects associated with charge injection and clock feed-through. The simulation results show that the dynamic effects can induce up to 10% error in the pixel current. A new driving scheme that enables control of the static and dynamic effects of the V_T-shift is presented.