Light-emitting arrangement with organic phosphor

Abstract

The invention provides a light-emitting arrangement comprising: a light source adapted to emit light of a first wavelength; a wavelength converting member comprising an organic wavelength converting material adapted to receive light of said first wavelength and to convert at least part of the received light to light of a second wavelength, said wavelength converting member and said light source being mutually spaced apart; and a sealing structure at least partially surrounding said wavelength converting member to form a sealed cavity containing at least said wavelength converting member, the gas pressure within said sealed cavity being 1*10−5 bar (1 Pa) or less. At such pressure, the organic phosphor has been found to have particularly good stability, thus resulting in a longer life time of the phosphor.

Dependencies are inferred from the claim text.