CAJ | 학술논문

为了研究大功率白光、蓝光LED在整个寿命中的颜色漂移,选用一系列的大功率白光、蓝光发光二极管分别进行了不同电流的恒流点亮.在点亮不同时间阶段测量了LED的发射光谱、色坐标和色温,研究了在不同电流点亮时的光通量、色坐标和色温的变化,分析了电流、时间等因素对颜色漂移的影响.结果表明,在不同电流点亮及同一电流点亮的不同时间阶段,LED的颜色不同.说明大功率LED的颜色漂移不仅是由荧光粉老化所引起,更主要的因素是材料本身的变化.文章对此进行了初步的分析,为白光LED的应用及进一步研究白光LED颜色漂移提供了参考.
위료연구대공솔백광、람광LED재정개수명중적안색표이,선용일계렬적대공솔백광、람광발광이겁관분별진행료불동전류적항류점량.재점량불동시간계단측량료LED적발사광보、색좌표화색온,연구료재불동전류점량시적광통량、색좌표화색온적변화,분석료전류、시간등인소대안색표이적영향.결과표명,재불동전류점량급동일전류점량적불동시간계단,LED적안색불동.설명대공솔LED적안색표이불부시유형광분노화소인기,경주요적인소시재료본신적변화.문장대차진행료초보적분석,위백광LED적응용급진일보연구백광LED안색표이제공료삼고.
To study color offset in the process of high-power LED life aging, a series of power white and blue LEDs are lighted continuously under invariable current respectively. Emission spectra, color coordinates and color temperature are measured at different period. Their changes are researched. Based on the analysis of cause of color offset, the result is that the color of LEDs are different at different period with the same current and different current lighting. It indicated that the colour offset of high-power LEDs are caused not only by aging of phosphors, but also due to the changes in the material itself. The results will provide a reference to the application of white LED and for the further study.