| 用于OLED驱动电路的振荡器设计 |
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| 引用本文： | 程亮,赵子龙.用于OLED驱动电路的振荡器设计[J].电子与封装,2019,19(4):24-27. |
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| 作者姓名： | 程亮 赵子龙 |
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| 作者单位： | 山西经济管理干部学院,太原,030024;重庆大学土木工程学院,重庆400045;重庆大学山地城镇建设与新技术教育部重点实验室,重庆400045 |
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| 基金项目： | 中国(重庆)新加坡博士后国际培训交流项目;中国((2017)154) |
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| 摘 要： | 有机发光二极管(OLED)在不同的工作温度下发光亮度不同,严重影响显示效果。为解决这一问题,需要在驱动芯片中设计温度传感器,实时采样温度信息来调整光亮度。利用带隙基准原理设计了一种输出信号的频率与绝对温度成线性关系的振荡器。通过带隙基准电源产生与绝对温度成正比例的电流,使用该电流对电容充放电以实现信号的振荡。采用CSMC 0.18μm CMOS工艺对电路仿真,电源电压设置为1.8 V,TT标准工艺角,仿真温度设置为0℃时,输出信号频率为3.447 MHz。温度每升高1℃,输出信号的频率增加16 k Hz,可以为OLED驱动电路提供精确的温度信息。
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| 关 键 词： | 振荡器 正比绝对温度的电流 驱动电路 有机发光二极管 |
A Design of Oscillator for OLED Drive Circuit |
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| CHENG Liang,ZHAO Zilong.A Design of Oscillator for OLED Drive Circuit[J].Electronics & Packaging,2019,19(4):24-27. |
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| Authors: | CHENG Liang ZHAO Zilong |
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| Affiliation: | (Shanxi Institute of Economic Management, Taiyuan 030024, China;School of Civil Engineering, Chongqing University, Chongqing 400045, China;Key Laboratory of New Technology for Construction of Cities in Mountain Area, Chongqing University, Ministry of Education, Chongqing 400045, China) |
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| Abstract: | The organic light emitting diode(OLED) has different luminance at different working temperatures,which affects the display effect. In order to solve this problem, it is necessary to design a temperature sensor in the drive chip to provide temperature information. In this paper, an oscillator with a linear variation in the frequency of the output signal with the temperature is designed. The proportional to absolute temperature(PTAT) current generated by a bandgap reference source is charged and discharged to the capacitor to realize the oscillation of the circuit. The CSMC 0.18 μm CMOS process is used for simulation. Under the 1.8 V power supply, the output frequency is 3.447 MHz at 0 ℃ through the TT corner process. When the temperature rises by1 ℃, the frequency of the output signal increases by 16 k Hz, which can provide effective temperature information for the OLED drive circuit. |
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| Keywords: | oscillator proportional to absolute temperature(PTAT) current drive circuit organic light emitting diode(OLED) |
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