MULTI-STACK PACKAGE LED
    9.
    发明申请
    MULTI-STACK PACKAGE LED 审中-公开
    多层包装LED

    公开(公告)号:US20110156071A1

    公开(公告)日:2011-06-30

    申请号:US12976374

    申请日:2010-12-22

    CPC classification number: H01L33/44 H01L33/46 H01L33/50 H01L33/504 H01L33/507

    Abstract: A multi-stack package light emitting diode (LED) includes an LED chip, a first fluorescent powder layer, a first optical bandpass filter layer and a second fluorescent powder layer. The LED chip generates an LED light. The first fluorescent powder layer and the second fluorescent powder layer respectively have a first fluorescent powder and a second fluorescent powder. The first fluorescent powder and the second fluorescent powder are excited by the LED light to respectively generate a first excitation light and a second excitation light. The first optical bandpass filter layer allows the LED light and the first excitation light to pass and reflects the second excitation light. A wavelength of the LED light is shorter than a wavelength of the second excitation light. The wavelength of the second excitation light is shorter than a wavelength of the first excitation light. Therefore, the multi-stack package LED improves a light emission efficiency.

    Abstract translation: 多层封装发光二极管(LED)包括LED芯片,第一荧光粉末层,第一光学带通滤光层和第二荧光粉层。 LED芯片产生LED灯。 第一荧光粉层和第二荧光粉层分别具有第一荧光粉和第二荧光粉。 第一荧光粉和第二荧光粉由LED光激发,分别产生第一激发光和第二激发光。 第一光学带通滤波器层允许LED光和第一激发光通过并反射第二激发光。 LED光的波长比第二激发光的波长短。 第二激发光的波长比第一激发光的波长短。 因此,多层封装LED提高了发光效率。

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