硅基OLED驱动芯片温度反馈PWM电路设计  

A Temperature Feedback PWM Circuit Design for Silicon-based OLED Driving Chip

作　　者：邱伟 秦昌兵[1,2] 朱会成 徐亭亭 张白雪 QIU Wei;QIN Changbing;ZHU Huicheng;XU Tingting;ZHANG Baixue(The 55th Research Institute of China Electronic Technology Group Corporation,Nanjing 210016,CHN;Nanjing Guozhao Photoelectric Technology Co.,Ltd.,Nanjing 211100,CH)

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]南京国兆光电科技有限公司,南京211100

出　　处：《光电子技术》2022年第1期36-40,共5页Optoelectronic Technology

摘　　要：提出了一种可用于硅基OLED驱动芯片的温度反馈PWM调节电路。该电路能够根据温度变化自动对OLED阵列上的共阴极电压进行PWM调制,从而实现温度变化时,保持OLED微显示器屏幕亮度和灰阶特性不变。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,当温度从-25℃变化至70℃时,屏幕亮度与灰阶特征保持不变。研究解决了OLED微显示器屏幕亮度随温度变化,传统共阴极电压调节方案会改变OLED的灰阶特性的问题。A temperature feedback PWM adjustment circuit has been proposed. The circuit could automatically pulse width modulate the common cathode voltage according to temperature changes,so as to maintain the brightness and gray-scale characteristics of the OLED screen with the temperature changing. The circuit used 0.18 μm 1P6M mixed-signal technology to complete the circuit design and tape-out verification. Simulation and test results showed that when the temperature changed from-45 °C to 70 °C,the screen brightness and grayscale characteristics remained unchanged. In the end,the problem about the brightness of the OLED screen changing with temperature,and the traditional solution changing the gray-scale characteristics were solved.

关 键 词：硅基有机发光二极管 微显示 温度反馈脉宽调制 

分 类 号：TN873[电子电信—信息与通信工程]