A 64-Step Gray Scale Driver Chip for a 132×64-Pixel Passive Matrix OLED  

实现64级灰度显示的无源OLED驱动芯片的设计(英文)

作　　者：刘铭[1] 秦波[1] 肖雯玉[1] 钟辉明[1] 陈亮[1] 刘利芳[1] 贾晨[1] 陈志良[1] 

机构地区：[1]清华大学微电子学研究所,北京100084

出　　处：《Journal of Semiconductors》2006年第11期1889-1893,共5页半导体学报（英文版）

摘　　要：A mixed-signal driver chip for a 132 × 64-pixel passive matrix OLED panel is presented. The chip has a 64-step gray scale control using the PWM method and two-step voltage pre-charge technology to pre-charge the OLED pixels. It consists of a digital controller,SRAM for display data memory,a DC-DC voltage converter,reference current generators,a pre-charge voltage generator,64 common drivers, and 132 segment drivers. The single chip is a typical current-drive circuit. It has been implemented in a Chartered 0.35/μm 18V HV （DDD） CMOS process with a die area of 10mm× 2mm. Test results show that the power consumption of the whole chip and all pixels with a constant driving current of 100μA while displaying the highest gray scale is 294mW with a 12V high voltage supply and a 3V low voltage supply.设计出了一种实现64级灰度显示的单片混合信号驱动芯片,它采用脉冲宽度调制方法和两级电压预充方式,适用于驱动132×64像素的无源OLED显示屏.芯片内部主要包括数字控制器,显示数据存取器,DC-DC电压转换器,参考电流产生器,电压预充电路产生器,64个行驱动电路和132个列驱动电路.它已经用Chartered0.35μm18V高压CMOS工艺制作完成,芯片面积约为10mm×2mm.测试结果表明芯片性能良好,在电源低压为3V,高压为12V,显示电流为100mA并处于最高级灰度显示的条件下,芯片与面板的总功耗为294mW.

关 键 词：OLED gray scales PWMs pre-charge segment driver common driver 

分 类 号：TN47[电子电信—微电子学与固体电子学]