Improved Transient Current Feedforward Output Buffer for Fast and Compact Active-Matrix OLED Column Drivers

Abstract

An improved transient current feedforward driver is designed for compact implementation and low-power consumption by adopting the demultiplexing operation of the proposed driver based on the fast driving speed of 6 mu s for the panel load of 6 k Omega/40 pF, which is equivalent to that of extended-graphic-array active-matrix organic light-emitting diode displays. The driver has the structural advantages of simple frequency compensation and low-power consumption, which come from the elimination of an internal operational transconductance amplifier (OTA). The chip implementation confers that the area of the driver is 32.5 x 217 mu m(2), and the power consumption is 6.5 mu A for each channel.