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    Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/28115


    Title: New collection systems for multi LED light engines
    Authors: Tu,SH;Pan,JW;Wang,CM;Lee,YC;Chang,JY
    Contributors: 光電科學研究所
    Date: 2009
    Issue Date: 2010-06-29 19:41:57 (UTC+8)
    Publisher: 中央大學
    Abstract: Light emitting diodes (LEDs) have numerous advantages as light sources in projectors. LEDs are more compact, exhibit a larger color gamut, have a longer lifetime, and need a lower supply voltage. However, there is still one important disadvantage: the optical power per unit of ,tendue (luminance) of an LED is significantly low. As a result of the ,tendue limitations of LEDs, the projected flux on the screen will not be high. Despite this shortcoming, LED's are still of great interest for low power applications because of their other superior properties. Thus we collect the available light flux optimally and combine multiple high luminance LEDs within the system. In this study we discuss three collection systems designed to collect the LED flux with high optical efficiency while retaining small device size. The best collection efficiency attained with our collection systems is 96%. The fabrication tolerance and cost of our collection systems are also analyzed.
    Relation: OPTICAL REVIEW
    Appears in Collections:[光電科學研究所] 期刊論文

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