| 实现64级灰度显示的无源OLED驱动芯片的设计 |
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| 引用本文： | 刘铭,秦波,肖雯玉,钟辉明,陈亮,刘利芳,贾晨,陈志良.实现64级灰度显示的无源OLED驱动芯片的设计[J].半导体学报,2006,27(11). |
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| 作者姓名： | 刘铭 秦波 肖雯玉 钟辉明 陈亮 刘利芳 贾晨 陈志良 |
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| 作者单位： | 清华大学微电子学研究所,北京,100084 |
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| 摘 要： | 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Chartered0.35μm 18V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.
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| 关 键 词： | 有机电致发光二极管 灰度显示 脉冲宽度调制 预充 列驱动 行驱动 |
A 64-Step Gray Scale Driver Chip for a 132×64-Pixel Passive Matrix OLED |
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| Liu Ming,Qin Bo,Xiao Wenyu,Zhong Huiming,Chen Liang,Liu Lifang,Jia Chen,Chen Zhiliang.A 64-Step Gray Scale Driver Chip for a 132×64-Pixel Passive Matrix OLED[J].Chinese Journal of Semiconductors,2006,27(11). |
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| Authors: | Liu Ming Qin Bo Xiao Wenyu Zhong Huiming Chen Liang Liu Lifang Jia Chen Chen Zhiliang |
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| Abstract: | 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 0.35μm 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. |
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| Keywords: | OLED gray scale PWM pre-charge segment driver common driver |
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