H - Electricity – 01 – L
Patent
H - Electricity
01
L
H01L 33/50 (2010.01) C09K 11/80 (2006.01) C09K 11/81 (2006.01)
Patent
CA 2375069
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 Eu2+, Mn2+ doped strontium pyrophosphate, (Sr0.8Eu0.1Mn0.1)2P2O7. The second phosphor may be a blue-green emitting Eu2+ doped SAE, (Sr0.90-0.99 Eu0.01-0.1)4Al14O25. A human observer perceives the combination of the orange and the blue-green phosphor emissions as white light.
La présente invention concerne un système d'éclairage à lumière blanche comportant une source de rayonnement, un premier matériau luminescent présentant une longueur d'onde maximale d'émission comprise entre environ 570 et environ 620 nm, et un second matériau luminescent présentant une longueur d'onde maximale d'émission comprise entre environ 480 et environ 500 nm, donc différent du premier matériau luminescent. Le dispositif à DEL peut être un DEL à UV et les matériaux luminescents peuvent être un mélange de deux phosphores. Le premier phosphore peut être du pyrophosphate de strontium dopé orange émettant Eu?+2¿ et Mn?2+¿, (Sr¿0.8?Eu¿0.1?Mn¿0.1?)¿2?P¿2?O¿7?. Le second phosphore peut être un SAE dopé bleu-vert émettant Eu?+2¿, (Sr¿0.90?-¿0?.¿99? Eu¿0?.¿01?-¿0.1?)¿4?Al¿14?O¿25?. L'oeil humain perçoit la combinaison des émissions de phosphore orange et bleu-vert comme une lumière blanche.
Comanzo Holly Ann
Srivastava Alok Mani
Company General Electric
Craig Wilson And Company
LandOfFree
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