US 2010/0142182 A1 · ILLUMINATION SYSTEM

Abstract

The invention provides an illumination system comprising a light-emitting device which excites a first luminescent element, which forms part of the light-emitting device. The light emitted from the first luminescent element and/or the light emitted by the light-emitting device excite a second luminescent element, physically separated from the light-emitting device. By employing two luminescent elements, the first element in the light-emitting device, and the second element physically separated from the light-emitting device, such as on a cover plate, the conversion of light produced by the light-emitting device is performed at both a “local” and a “remote” location, respectively, and the amount of luminescent material required at the remote location may be reduced compared to the situation of the prior art where the light conversion was only performed at a remote location.

Claims13

Dependent claims

An illumination system comprising:

a semiconductor light-emitting device configured to emit light of a first primary color, the semiconductor device comprising a first luminescent element which is configured to absorb at least part of the light of the first primary color and to emit light of a second primary color;
a second luminescent element separated from the semiconductor light-emitting device and configured to absorb at least part of the light of the first or second primary colors and to emit light of a third primary color;
wherein the illumination system is configured to combine light of at least one or more of said first, second and third primary colors to form the output light of the illumination system, an effective thickness of the second luminescent element being selected for correcting a color point of the output to attain a desired target point of the output light.

Dependencies are inferred from the claim text.

Illumination system

Life of this patent

Illumination system

Life of this patent

Abstract

Claims13