Title :
A Single Driver Chip for Gray Scale Passive-Matrix OLED
Author :
Liu, Ming ; Jia, Chen ; Chen, Zhiliang
Author_Institution :
Inst. of Microelectron., Tsinghua Univ., Beijing
Abstract :
A single driver chip for the 132times64-pixel passive-matrix OLED panel is presented. The developed driver chip has a 64-step gray scale control using PWM method and two-step voltage pre-charge technology to pre-charge the OLED pixels. It consists of a digital controller, a SRAM as display data memory, a DC-DC voltage converter, reference current generators, a pre-charge voltage generator, 64 common drivers and 132 segment drivers. The chip is a typical current-drive circuit. Power consumption of the whole chip and all pixels with a constant driver current 100 muA is investigated by the Nanosim simulation. When all pixels displaying the highest gray scale, it is shown that the consumed power is about 340 mW at 15 V high voltage supply and 3.3 V low voltage supply
Keywords :
LED displays; driver circuits; flat panel displays; low-power electronics; organic light emitting diodes; 100 muA; 132 pixel; 15 V; 3.3 V; 64 pixel; 8448 pixel; DC-DC voltage converter; PWM method; SRAM; current-drive circuit; digital controller; display data memory; gray scale passive-matrix OLED; organic light emitting display; reference current generator; single driver chip; two-step voltage precharge technology; Circuit simulation; DC-DC power converters; Digital control; Driver circuits; Energy consumption; Flat panel displays; Organic light emitting diodes; Pulse width modulation; Random access memory; Voltage control;
Conference_Titel :
Communications, Circuits and Systems Proceedings, 2006 International Conference on
Conference_Location :
Guilin
Print_ISBN :
0-7803-9584-0
Electronic_ISBN :
0-7803-9585-9
DOI :
10.1109/ICCCAS.2006.285112
