A Novel Data Driving Method and Circuits for AMOLED Displays

Abstract

A novel current-mode driving method and driving circuits are proposed for AMOLED displays. The data driving speed in conventional current-mode driving methods is dramatically enhanced by the proposed method and circuits. The proposed method shortens data driving time with feedback of the transient charging current from the parasitic capacitance of an adjacent data line. The current consumption and chip size of the data driver IC are reduced by a half, because one data driving circuit can drive two data lines of a display panel. 10 nA data current can be transferred to the pixel circuit of a display panel with subnA accuracy in 15 μsec. The data line parasitic resistance and capacitance are 4 kohm and 20 pF, respectively.