一种单级无汞平面光源高压驱动电源的设计与研究

Design and Implement a New Type of High Voltage Power Supply for Mercury Free Flat Fluorescent Lamp

无汞平面光源由于具有无污染、寿命长、响应时间短等优点,因而在液晶背光源和照明领域具有非常广阔的前景。传统的无汞平面光源采用两级或者多级结构,本文给出了一种单级结构的无汞平面光源的高压驱动电源并对其工作原理进行了简要分析。最后设计制作了基于该结构的无汞平面光源电路原型并同传统的多级结构进行了比较,实验证明,采用单级结构可以提高无汞平面光源的发光效率。

Mercury free flat fluorescent lamp （FFL） has a cheerful prospect in many areas, such as hacklight for LCD and lighting since it is environmental, long life and has a short response time. Traditionally, the driving power supply of FFL including two or more stage, in this paper, a switching power supply driving circuit with single stage, which can drive the FFL efficiently, was proposed and analyzed. Finally a circuit prototype was build and efficiency was compared with the traditional one; it shows the designed circuit can improve the luminous efficiency of FFL with higher converter efficiency and lower costs.