一种用于硅基OLED驱动芯片的PWM电路设计  

Design of a PWM Circuit for Silicon based OLED Driving Chip

作　　者：秦昌兵[1,2] 陈啟宏 徐亭亭 张白雪 杨建兵[1,2] QIN Changbing;CHEN Qihong;XU Tingting;ZHANG Baixue;YANG Jianbing(The 55th Research Institute of China Electronic Technology Group Corporation,Nanjing 210016,CHN;National Flat Panel Display Engineering Technology Research Center,Nanjing 210016,CHN)

机构地区：[1]中国电子科技集团公司第五十五研究所,南京210016 [2]国家平板显示工程技术研究中心,南京210016

出　　处：《光电子技术》2020年第1期44-47,51,共5页Optoelectronic Technology

摘　　要：为改善传统模拟驱动方式在调亮时会改变OLED灰阶特性的现象,提出了一种可用于硅基OLED驱动芯片的脉宽调制电路(Pulse Width Modulation,PWM)电路。该电路对加在OLED阵列上的共阴极电压进行PWM调制,从而达到在调节亮度时灰阶特性不变的目的。电路采用0.18μm 1P6M混合信号工艺完成了电路设计和流片验证。仿真和测试结果表明,当亮度从100 cd/m^2调节到500 cd/m^2时,灰阶特征得到了明显的改善。In order to improve the gray-scale characteristics when the traditional analog driving scheme is dimmed,a PWM circuit for silicon-based OLED driving chip has been presented.The cir cuit could modulate the common cathode voltage applied to the OLED array with PWM,so as to achieve the same gray scale characteristics when adjusting brightness.The circuit was designed and verified by the 0.18μm mix-signal 1P6M CMOS process.Simulation and test results show that when the brightness is adjusted from 100 cd/m^2 to 500 cd/m^2,the gray-scale characteristics could be signifi cantly improved.

关 键 词：硅基有机发光二极管 微显示 脉宽调制电路(PWM) 

分 类 号：TN312.8[电子电信—物理电子学] TN432