Title :
A Double Zeros Compensated Direct Fast Feedback Current Driver for Medium to Large AMOLED Displays
Author :
Jeon, Jin-Yong ; Jeon, Yong-Joon ; Son, Young-Suk ; Cho, Gyu-Hyeong
Author_Institution :
Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol., Daejeon, South Korea
Abstract :
A current feedback driver with double zeros compensation is proposed for medium to large AMOLED displays. The zeros for lead compensation are implemented with switched-capacitor circuits to reduce chip area. The selection rules for compensation capacitors and zero capacitors are described to obtain wide bandwidth and high speed. The proposed driver has a settling time of 7 μs for the panel load of 10 kΩ/100 pF. De-multiplexing operation is realized to drive two channels using one proposed driver. The chip area is 120 × 183 μm2 per two channels in a 0.35 μm CMOS process.
Keywords :
LED displays; organic light emitting diodes; switched capacitor networks; AMOLED displays; CMOS process; active matrix OLED displays; chip area; compensation capacitor; demultiplexing operation; double zeros compensated direct fast feedback current driver; double zeros compensation; lead compensation; switched capacitor circuit; zero capacitor; Bandwidth; Capacitors; Clocks; Feedback loop; Impedance; Resistance; Resistors; AMOLED; column driver; double zeros; fast feedback current driver; feedback driver; lead compensation;
Journal_Title :
Circuits and Systems I: Regular Papers, IEEE Transactions on
DOI :
10.1109/TCSI.2012.2188948
