电致发光器件的复合开关电路驱动技术  

Driving technique of electroluminescent devices by complex switching circuits

作　　者：卯龙 何志毅[2] 郑岩 郭士玉 MAO Long;HE Zhi-yi;ZHENG Yan;GUO Shi-yu(Information and Communication College,Guilin University of Electronic Technology,Guilin 541004,China;Guangxi Key Laboratory of Wireless Broadband Communication and Signal Processing,Guilin University of Electronic Technology,Guilin 541004,China;Shanghai Kerune phosphor technology Co.,Ltd.,Shanghai 200233,China)

机构地区：[1]桂林电子科技大学信息与通信学院,广西桂林541004 [2]桂林电子科技大学广西无线宽带通信与信号处理重点实验室,广西桂林541004 [3]上海科润光电材料有限公司,上海200233

出　　处：《液晶与显示》2022年第4期444-450,共7页Chinese Journal of Liquid Crystals and Displays

基　　金：国家自然科学基金(No.61961008);广西无线宽带通信与信号处理重点实验室(No.GXKL06190103);桂林电子科技大学研究生科研创新项目(No.2022YCXS035)。

摘　　要：设计了一种柔性电致发光(EL)器件驱动电源的复合开关电路。EL器件表现为容性负载,造成其交流驱动电源开关电路中晶体管开通瞬间很大的尖峰电流而易烧毁,降低了驱动电源可靠性。因此使用瞬时电流容量大的可控硅(SCR)充当驱动电源电路的主开关管,在其阳极-阴极两端并联MOS管延迟导通/关断,起到分流和短接可控硅的作用,从而使可控硅在开通之后能够关断。适当调节MOS管延迟开关时间错开尖峰电流且使两种开关管的温升相等或相近,进一步提高这种可控硅-MOS管复合开关电路的可靠性。A composite switching circuit for flexible electroluminescent(EL)device driver was designed.The EL devices behave as capacitive loads,resulting in the transistors’breaking down by the high peak current of the transistors at the instant as they are turned on and thus low reliability of the drivers.The thyristors(SCRs)with higher transient current capacity were employed as the main switching devices for the driver,in parallel connection to the MOSFETs.The MOSFETs play the roles of current shunt and shortcircuiting,thereby turn off the thyristors after being turned on.The MOSFETs can stay off the peak current and the two kinds of transistor,both the thyristors and MOSFETs,could have the same or nearly the same temperature rise by properly adjusting the delay time of the MOSFETs,further improve the reliability of this composite thyristor-MOSFET switching circuit.

关 键 词：电致发光 驱动电源 容性负载 复合开关电路 

分 类 号：TM923[电气工程—电力电子与电力传动]