光子学报

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基于金属线路板的新型大功率LED及其光电特性研究

李炳乾   

  1. 佛山科学技术学院物理系,广东佛山 528000
  • 收稿日期:2004-04-12 出版日期:2005-03-25 发布日期:2005-03-25

A New Type High Power Lighting Emitting Diodes Based on MCPCB and its Opto-electrical Characteristics

Li Bingqian   

  1. Department of Physics, Foshan University, Guangdong 528000
  • Received:2004-04-12 Online:2005-03-25 Published:2005-03-25

摘要: 设计、制作了基于金属线路板和板上芯片技术的大功率白光LED,对其光电特性进行了实验测量,输入电流达到800 mA,对应的输入功率3.3 W,大功率LED的输出光通量才达到饱和.输入电流达到900 mA,对应的输入功率3.8 W,大功率LED电流—电压特性仍未表现出饱和特性.实验结果表明,采用金属线路板和板上芯片技术可以得到良好的散热特性,大大提高LED的输入功率.同时还测量了光谱分布、光通量、色坐标随电流的变化情况,对其中的变化规律进行了理论分析.

关键词: 大功率, 白光LED, 金属线路板

Abstract: A new type of high power white LEDs (HPW-LEDs) based on metal core printed circuit board (MCPCB) and chip on board (COB) technique is designed and demonstrated, its opto-electrical characteristics are measured. The saturated characteristics of luminous flux is obvious at the forward current 800 mA (corresponding the forward power 3.3 mW), and the saturated characteristics of voltage-current is obvious until the forward current added to 800 mA, (corresponding the forward power 3.3 mW). These results show the MCPCB and COB technique could solve the problem of heat transfers very well, so the HPW-LEDs could work at a high level forward power. At the same time, the spectrum, luminous flux, and chromaticity coordinates of HPW-LEDs change with forward current are studied.

Key words: High power, White LED, Metal core printed circuit board