Importance

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Abstract

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).sub.5 (PO.sub.4).sub.3 Cl:Eu.sup.2+ (SECA) and BaMg.sub.2 Al.sub.16 O.sub.27 :Eu.sup.2+ with a second phosphor having the formula (Tb.sub.1-x-y A.sub.x RE.sub.y).sub.3 D.sub.z O.sub.12 (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.

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First Claim