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    • 4. 发明授权
    • UV reflectors and UV-based light sources having reduced UV radiation leakage incorporating the same
    • 紫外线反射器和紫外线光源具有降低的包含其的紫外线辐射泄漏
    • US06686676B2
    • 2004-02-03
    • US09681560
    • 2001-04-30
    • Thomas Francis McNultyDaniel Darcy DoxseeJames Wilson Rose
    • Thomas Francis McNultyDaniel Darcy DoxseeJames Wilson Rose
    • H01K130
    • H01L33/44B82Y20/00G02B5/206G02B5/208H01L33/501H01L2224/48091H01L2224/48247H01L2924/19107H01L2933/0091H01L2924/00014
    • UV reflectors incorporated in UV LED-based light sources reduce the amount of UV radiation emission into the surroundings and increase the efficiency of such light sources. UV reflectors are made of nanometer-sized particles having a mean particle diameter less than about one-tenth of the wavelength of the UV light emitted by the UV LED, dispersed in a molding or casting material surrounding the LED. Other UV reflectors are series of layers of materials having alternating high and low refractive indices; each layer has a physical thickness of one quarter of the wavelength divided by the refractive index of the material. Nanometer-sized textures formed on a surface of the multilayered reflector further reduce the emission of UV radiation into the surroundings. UV LED-based light sources include such a multilayered reflector disposed on an encapsulating structure of a transparent material around a UV LED, particles of a UV-excitable phosphor dispersed in the transparent material. Alternatively, the transparent material also includes nanometer-sized particles of a UV-radiation scattering material.
    • 结合在UV基于LED的光源中的紫外线反射器减少了向周围环境中的紫外线辐射的量,并提高了这种光源的效率。 UV反射器由纳米尺寸的颗粒制成,其平均粒径小于由UV LED发射的UV光的波长的大约十分之一,分散在围绕LED的成型或铸造材料中。 其他UV反射器是具有交替的高折射率和低折射率的一系列材料层; 每个层的物理厚度为波长的四分之一除以材料的折射率。 形成在多层反射镜的表面上的纳米尺寸的纹理进一步减少了向周围环境的紫外线辐射。 UV基于LED的光源包括设置在UV LED周围的透明材料的封装结构上的这种多层反射器,分散在透明材料中的可紫外线激发的荧光体的颗粒。 或者,透明材料还包括紫外线辐射散射材料的纳米尺寸的颗粒。
    • 6. 发明授权
    • White light emitting device based on UV LED and phosphor blend
    • 基于UV LED和荧光粉混合的白光发光器件
    • US06765237B1
    • 2004-07-20
    • US10342995
    • 2003-01-15
    • Daniel Darcy DoxseeCherian Jacob
    • Daniel Darcy DoxseeCherian Jacob
    • H01L29227
    • H01L33/504C09K11/7734C09K11/7739C09K11/7774H01L33/502H01L2224/48247H01L2224/48257H01L2924/181Y02B20/181H01L2924/00012
    • A light source including a specific LED and phosphor combination capable of emitting white light for direct illumination. In one embodiment, the light source includes an LED chip emitting in the 380-420 nm range radiationally coupled to a phosphor blend first phosphor selected from the group consisting of (Sr,Ba,Ca,Mg)5(PO4)3Cl:Eu2+ (SECA) and BaMg2Al16O27:Eu2+ with a second phosphor having the formula (Tb1-x-yAxREy)3DzO12 (TAG), where A is a member selected from the group consisting of Y, La, Gd, and Sm; RE is a member selected from the group consisting of Ce, Pr, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb, and Lu; D is a member selected from the group consisting of Al, Ga, and In; x is in the range from 0 to about 0.5, y is in the range from about 0 to about 0.2, and z is in the range from about 4 to about 5. The light source thus produced will provide a high quality white light.
    • 一种光源,包括能够发出白光直接照明的特定LED和荧光体组合。 在一个实施例中,光源包括发射在380-420nm范围内的LED芯片,其辐射耦合到选自由(Sr,Ba,Ca,Mg)5(PO 4)3 Cl:Eu 具有式(Tb1-x-yAxREy)3DzO12(TAG)的第二种磷光体,其中A是选自Y,La,Gd, 和Sm; RE为选自Ce,Pr,Nd,Sm,Eu,Gd,Dy,Ho,Er,Tm,Yb和Lu的成员; D是选自Al,Ga和In的成员; x在0至约0.5的范围内,y在约0至约0.2的范围内,并且z在约4至约5的范围内。由此产生的光源将提供高质量的白光。