发明名称 |
A WHITE LIGHT EMITTING PHOSPHOR BLEND FOR LED DEVICES |
摘要 |
There is provided a white light illumination system including a radiation source, a first luminescent material having a peak emission wavelength of about 570 to about 620 nm, and a second luminescent material having a peak emission wavelength of about 480 to about 500 nm, which is different from the first luminescent material. The LED may be a UV LED and the luminescent materials may be a blend of two phosphors. The first phosphor may be an orange emitting Eu<SUP>2+</SUP>,Mn<SUP>2+</SUP> doped strontium pyrophosphate, (Sr<SUB>0.8</SUB>Eu<SUB>0.1</SUB>Mn<SUB>0.1</SUB>)<SUB>2</SUB>P<SUB>2</SUB>O<SUB>7</SUB>. The second phosphor may be a blue-green emitting Eu<SUP>2+</SUP> doped SAE, (Sr<SUB>0.90-0.99 </SUB>Eu<SUB>0.01-0.1</SUB>)<SUB>4</SUB>Al<SUB>14</SUB>O<SUB>25</SUB>. A human observer perceives the combination of the orange and the blue-green phosphor emissions as white light. |
申请公布号 |
EP1295347(A1) |
申请公布日期 |
2003.03.26 |
申请号 |
EP20010935460 |
申请日期 |
2001.05.14 |
申请人 |
GENERAL ELECTRIC COMPANY |
发明人 |
SRIVASTAVA, ALOK, MANI;COMANZO, HOLLY, ANN |
分类号 |
F21V9/16;C09K11/08;C09K11/61;C09K11/62;C09K11/64;C09K11/71;C09K11/72;C09K11/77;F21V5/04;F21Y101/02;H01L33/50;(IPC1-7):H01L33/00;C09K11/80;C09K11/81 |
主分类号 |
F21V9/16 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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