Koninklijke Philips Corporation N.v.

Philips Lumileds Lighting Company LLC

Jörg Meyer

Rifat Ata Mustafa Hikmet

Peter Josef Schmidt

Gerd O Mueller

Walter Mayr

Regina B Mueller-Mach

Ramon Pascal Van Gorkom

René Theodorus Wegh

Hans-Dieter Bausen

Martinus P J Peeters

The invention relates to a daylight illumination apparatus. A daylight collector () collects daylight (), which is guided to an illumination location to be illuminated along an optical path by a light guide (), wherein the daylight is absorbed by the light guide. A photoluminescent material () is arranged within the optical path and emits photoluminescent light that compensates for the absorption of the daylight by the light guide. Absorption losses of the daylight can therefore effectively be compensated, without necessarily needing, for example, an active compensation light source. This allows providing compensated daylight illumination in a technically relatively simple way.

Daylight illumination apparatus

The invention concerns an illumination system for generation of colored, especially amber or red light, comprising a radiation source and a fluorescent material comprising at least one phosphor capable of absorbing a part of light emitted by the radiation source and emitting light of wavelength different from that of the absorbed light; wherein said at least one phosphor is a amber to red emitting a rare earth metal-activated oxonitridoalumosilicate of general formula (CaSrBaMg)(AlB)SiNO:RE, wherein 0&#x2266;x&#x2266;1, 0&#x2266;y&#x2266;1, 0&#x2266;z&#x2266;1, 0&#x2266;a&#x2266;1, 0&#x3c;b&#x2266;1 and 0.002&#x2266;n&#x2266;0.2 and RE is selected from europium(II) and cerium(III).

Illumination system comprising a radiation source and a fluorescent material

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Aachen, Germany

Jörg Meyer