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    • 81. 发明授权
    • White light emitting phosphor blends for LED devices
    • 用于LED器件的白色发光荧光粉混合物
    • US06621211B1
    • 2003-09-16
    • US09570932
    • 2000-05-15
    • Alok Mani SrivastavaHolly Ann ComanzoThomas Francis McNulty
    • Alok Mani SrivastavaHolly Ann ComanzoThomas Francis McNulty
    • H01J3300
    • H01L33/504C09K11/7734H01L2224/48091H01L2924/12044Y02B20/181H01L2924/00014H01L2924/00
    • There is provided white light illumination system including a radiation source, a first luminescent material having a peak emission wavelength of about 575 to about 620 nm, a second luminescent material having a peak emission wavelength of about 495 to about 550 nm, which is different from the first luminescent material and a third luminescent material having a peak emission wavelength of about 420 to about 480 nm, which is different from the first and second luminescent materials. The LED may be a UV LED and the luminescent materials may be a blend of three or four phosphors. The first phosphor may be an orange emitting Eu2+, M+ activated strontium pyrophosphate, Sr2P2O7:Eu2+, Mn2+. The second phosphor may be a blue-green emitting Eu2+ activated barium silicate, (Ba,Sr,Ca)2SiO4:Eu2+. The third phosphor may be a blue emitting SECA phosphor, (Sr,Ba,Ca)5(PO4)3Cl:Eu2+. Optionally, the fourth phosphor may be a red emitting Mn4+ activated magnesium fluorogermanate, 3.5MgO*0.5MgF2*GeO2:Mn4+. A human observer perceives the combination of the orange, blue-green, blue and/or red phosphor emissions as white light.
    • 提供了包括辐射源的白光照明系统,具有约575至约620nm的峰值发射波长的第一发光材料,具有约495至约550nm的峰值发射波长的第二发光材料,其不同于 第一发光材料和具有约420至约480nm的峰值发射波长的第三发光材料,其不同于第一和第二发光材料。 LED可以是UV LED,发光材料可以是三种或四种荧光体的混合物。 第一个磷光体可以是橙色发射的Eu 2+,M +活化的焦磷酸锶,Sr2P2O7:Eu2 +,Mn2 +。 第二荧光体可以是发蓝光的Eu2 +活化的硅酸钡(Ba,Sr,Ca)2 SiO 4:Eu 2+。 第三荧光体可以是发蓝光的SECA荧光体(Sr,Ba,Ca)5(PO4)3Cl:Eu2 +。 任选地,第四个磷光体可以是发射红色的Mn4 +活化的氟化氟镁,3.5MgO * 0.5MgF2 * GeO2:Mn4 +。 人类观察者将橙色,蓝绿色,蓝色和/或红色荧光体发射的组合视为白光。