ILLUMINATION DEVICE, PARTICULARLY WITH LUMINESCENT CERAMICS

摘要

The invention relates to an illumination device (10) that comprises an active layer (11), for example a blue LED, covered with a first luminescent ceramic converter layer (12) and partially covered with a second luminescent ceramic converter layer (13). The first and second conversion layers (12, 13) convert primary photons (?_p) emitted by the active layer (11) into photons of different, longer wavelengths (?₁, ?₂), wherein the color point of the illumination device (10) can be adjusted by adjusting the relative size of the second conversion layer (13).