摘要
大功率LED照明单元在光通量提高的同时伴随着散热,且普通功率型白光LED多采用蓝光芯片激发荧光粉的方法,随着温度的提升,荧光粉对应的波长会发生漂移。本文从功率型白光LED的发热原理出发,试验了其在脉冲源作用下,用于照明的可能性。试验表明,在此激励源的作用下,LED输出与散热很好,并从理论上进行了解释。
White LEDs may be used as light source, however, the thermal dissipation of powerful white LEDs which comes along with the high luminous flux is a great trouble. The most of commercial white LEDs are made of blue chip and fluorescence powder,and the powder is sensitive to temperature. With the rise of temperature, the corresponding wavelength of the powder will be excursion. This paper demonstrated the possibility of LEDs being used as light source when driven by pulse. The results show that powerful white LED is better at thermal dissipation when driven by this kind of energy input. The author has given explanation at the end of the article.
出处
《光电子．激光》
EI
CAS
CSCD
北大核心
2006年第8期945-947,957,共4页
Journal of Optoelectronics·Laser
基金
国家科技攻关计划资助项目(00-068)
关键词
白光LED
光通量
散热
脉冲源
white LEDs
luminous flux
thermal dissipation
pulse
