Stabilized wavelength converting element

Abstract

A wavelength converting member is provided, comprising a wavelength converting layer comprising an organic wavelength converting compound distributed in a matrix comprising an amorphous or semi-crystalline aromatic polyester wherein the aromatic polyester molecules are predominantly in a randomly oriented state, said wavelength converting member further comprising at least one support element. By avoiding uniaxial or biaxial orientation of the polyester matrix, the organic wavelength converting compound (organic phosphor) is well protected against photo-chemical degradation. The support element ensures the dimensional stability of the polyester matrix at temperature above the glass transition temperature.

Dependencies are inferred from the claim text.