CAJ | 학술논문

为了提高AC－LED光利用率，本文设计了一种利用结型场效应管开关特性控制AC－LED中阵列晶粒分段提前导通的电路。利用Pspice软件设计了电路模型，优化了结型场效应管参数，提高了场效应管的开关响应速度、饱和工作时间以及控制了饱和电流值。对LED晶粒分组，降低了LED晶粒开启电压。得到了场效应管依次控制各组LED晶粒提前、恒流导通的效果。仿真结果表明：利用结型场效应管控制AC－LED分段导通，每个周期的导通时间由未加场效应管的40％提高到了90％。
위료제고AC－LED광이용솔，본문설계료일충이용결형장효응관개관특성공제AC－LED중진렬정립분단제전도통적전로。이용Pspice연건설계료전로모형，우화료결형장효응관삼수，제고료장효응관적개관향응속도、포화공작시간이급공제료포화전류치。대LED정립분조，강저료LED정립개계전압。득도료장효응관의차공제각조LED정립제전、항류도통적효과。방진결과표명：이용결형장효응관공제AC－LED분단도통，매개주기적도통시간유미가장효응관적40％제고도료90％。
In order to improve the light source utilization rate , we design a circuit of AC-LED grains segmented conduction controlled by Junction Field-effect Transistor . By designing circuit model and optimizing parameters , The Jfet switch respond speed and saturation time are increased . And also, saturation current is obviously controlled .We divide AC-LED grains into groups with lower forward voltage . The effect is achieved that each group of LED grains controlled by Jfet turn on earlier with constant current . The simulation result shows that the turn-on time of AC-LED controlled by Jfet reaches 90%, meanwhile the turn-on time of AC-LED without the control of Jfet is 40%in a cycle .