光电子技术, 2016, 36 (4): 265, 网络出版: 2016-12-21   

一种高分辨率硅基OLED驱动芯片设计

The Design of High Resolution OLED-on-silicon Microdisplay Driving Chip
作者单位
中国电子科技集团公司第五十五研究所, 南京 210016
摘要
设计了一款分辨率为1400×1050的OLED微显示器驱动芯片。利用10位的DAC将数字视频信号转成模拟信号, 内置10位计数器和数字比较器完成视频信号的传输, 内置温度检测、负压电源CUK电路、正压电源LDO以及I2C接口等模块电路, 可满足硅基OLED微显示器高集成度的需要。像素电路采用了改进的电压型驱动方式, 能够在较宽的OLED公共阴极电压范围内维持很大的电流比率。采用0.18 μm 1P6M混合信号工艺完成了电路设计和仿真验证, 仿真结果表明, 芯片在120M时钟频率下能够实现256级灰度, 输出OLED像素电流范围为11 pA~215 nA, 可以满足高分辨率OLED阵列高亮度和高对比度的要求。
Abstract
A 1400×1050 pixel OLED on silicon microdisplay driving circuit was presented. The 10-bit DAC converted the digital video signal to analog signal, and the internal 10-bit counter and digital comparator could complete the video signal conversion. The chip integrated the temperature sensor, negative CUK voltage converter, positive LDO voltage converter and I2C interface, which could meet the requirement of high integration. The pixel circuits employed the proposed voltage driving method, which could still reach a high contrast ratio in a wide range of the OLED common cathode voltage. The circuit was designed by the 0.18 μm mix-signal 1P6M CMOS process. Simulation results show that the chip can work properly at a pixclk frequency of 120 MHz and has a 256 grayscale display. The pixel current is modulated between 11 pA and 215 nA, which could meet the requirement of high resolution OLED microdisplay with high brightness and high contrast ratio.

张白雪, 秦昌兵, 任健雄, 杨建兵. 一种高分辨率硅基OLED驱动芯片设计[J]. 光电子技术, 2016, 36(4): 265. ZHANG Baixue, QIN Changbing, REN Jianxiong, YANG Jianbing. The Design of High Resolution OLED-on-silicon Microdisplay Driving Chip[J]. Optoelectronic Technology, 2016, 36(4): 265.

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