发明名称 |
LIGHT EMITTING DEVICE |
摘要 |
Light source comprises an element emitting light in the blue and/or UV region of the optical spectrum; and a luminophore made from an alkaline earth orthosilicate optionally activated with europium and absorbing a portion of the light emitted by the light source and emitting in another spectral region. The an alkaline earth orthosilicate has the composition: (2-x-y)SrO.x(Ba u, Ca v).(1-a-b-c-d)SiO 2.aP 2O 5bAl 2O 3cB 2O 3dGeO 2: yEu 2> +> (where x = 0-1.6; y = 0.005-0.5; x + y = 1.6; a, b, c, d = 0-0.5; u + v = 1), and/or the composition: (2-x-y)BaO.x(Sr u, Ca v).(1-a-b-c-d)SiO 2.aP 2O 5bAl 2O 3cB 2O 3dGeO 2: yEu 2> +> (where x = 0-1.6; y = 0.005-0.5; a, b, c, d = 0-0.5; u + v = 1; and x.u is at least 0.4). At least one of a, b, c and d is more than 0.01. Preferred Features: At least a part of the silicon in the luminophore can be replaced by gallium. One or more LED chips (1) are arranged on a circuit board (2) within a reflector (4) and the luminophore is dispersed in a light plate (5) arranged above the reflector. |
申请公布号 |
EP1347517(A4) |
申请公布日期 |
2009.01.14 |
申请号 |
EP20010272546 |
申请日期 |
2001.12.28 |
申请人 |
TOYODA GOSEI CO., LTD.;TORIDONIC OPTOELECTRONICS GMBH;LITEC GBR;LEUCHSTOFFWERK BREITUNGEN GMBH |
发明人 |
OTA, KOICHI;HIRANO, ATSUO;OTA, AKIHITO;TASCH, STEFAN;PACHLER, PETER;ROTH, GUNDULA;TEWS, WALTER;KEMPFERT, WOLFGANG;STARICK, DETLEF |
分类号 |
H01L33/50;C09K11/77;H01L33/06;H01L33/32;H05B33/20 |
主分类号 |
H01L33/50 |
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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