Led light-emitting device
    5.
    发明专利

    公开(公告)号:JP5210109B2

    公开(公告)日:2013-06-12

    申请号:JP2008255115

    申请日:2008-09-30

    CPC classification number: H01L33/58

    Abstract: PROBLEM TO BE SOLVED: To provide an LED light-emitting device capable of easily controlling the outer appearance color of a phosphor layer when light is turned off. SOLUTION: The phosphor layer 13 of the LED light-emitting device 1 has a structure in which a yellow phosphor layer 13a, a red phosphor layer 13b and a blue phosphor layer 13c are sequentially laminated from the side near an LED 10. The thickness and the phosphor concentration of the blue phosphor layer 13c are each set at a value at which when the yellow phosphor layer 13a and the red phosphor layer 13b are excited by an outside light and emit a yellow light and a red light, respectively, the yellow light and the red light do not pass through the blue phosphor layer 43b. As the result, the outer appearance color of the phosphor layer 13 when the LED light-emitting device 1 is lighted off is white as the outer appearance color of the blue phosphor layer 13c. Since the LED light-emitting device 1 emits a white color light and this color matches the outer appearance color of the phosphor layer 13 when light is turned off, the outer appearance quality is high. COPYRIGHT: (C)2010,JPO&INPIT

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