Patent ID: 6278135
Filing Date: 2001-08-21
Classification: C09K,H01L,H05B,Y02B

Abstract:
A light source comprising:a light emitting diode which emits ultraviolet light; anda phosphor composition that is capable of absorbing ultraviolet radiation and emitting visible light, the phosphor composition comprising at least one of: Ba.sub.2 SiO.sub.4 :Eu.sup.2+ ; Ba.sub.2 MgSi.sub.2 O.sub.7 :Eu.sup.2+, Ba.sub.2 ZnSi.sub.2 O.sub.7 :Eu.sup.2+ ; BaAl.sub.2 O.sub.4 :Eu.sup.2+ ; SrAl.sub.2 O.sub.4 :Eu.sup.2+ ; and BaMg.sub.2 Al.sub.16 O.sub.27 :Eu.sup.2+.