硅基有机发光微显示像素驱动电路设计  

Design of OLED-on-Silicon Microdisplay Pixel Driving Circuits

作　　者：王晓慧[1] 王文博[1] 陈淑芬[2] 孟彦龙[2] 杜寰[1] 韩郑生[1] 赵毅[2] 

机构地区：[1]中国科学院微电子研究所,北京100029 [2]吉林大学集成光电子学国家重点实验室,吉林长春130023

出　　处：《液晶与显示》2008年第1期68-72,共5页Chinese Journal of Liquid Crystals and Displays

基　　金：国家重点基础研究发展计划资助项目(No.2003CB314705)

摘　　要：由于微型显示像素面积的限制,硅基有机发光微显示像素驱动电路需要实现足够小的驱动电流。文章提出的三管电压控制型像素驱动电路与常规的采用电流镜电路的电流控制型像素驱动电路都能实现微显示所需的小电流驱动。利用Synopsys公司的H-spice软件对两种电路仿真比较,发现电流控制型电路具有线性灰度和较宽的有效灰度范围,但是通过调整电压控制型电路中与OLED并联的晶体管的宽长比,即可使其有效灰度范围与电流控制型电路可比。同时也发现电流控制型电路的功耗是电压控制型电路的4倍以上,且电路形式较复杂,工艺要求较高。所以三管电压控制型电路更适合于硅基有机发光微显示驱动电路。Because of the limit of microdisplay＇s pixel area, the driving current of OLED-on-Silicon microdisplay pixel driver should be small enough. A new voltage-programmed pixel driver with three transistors proposed by author and the current-programmed pixel driver based on the current mirror circuit can both provide small enough driving currents. With the software H-spice of Synopsys, these two circuits were simulated and compared. Simulation results show that current-programmed driver has linear gray scales and wider gray levels. While through adjusting the W/L of the transistor paralleled to OLED in the voltage-programmed driver, a comparable gray levels can be obtained. Additionally, the current-programmed driver＇s power consumption is about 4 times than that of the voltage-programmed driver, and it＇s more complex, and its process requirement is higher. So the conclusion is that the three-transistor voltage-programmed pixel driver is preferable for OLED-on-silicon microdisplay.

关 键 词：硅基有机发光微显示驱动 电压控制型 电流控制型 像素驱动 小电流驱动 

分 类 号：TN27[电子电信—物理电子学] TN702