White light illumination device

摘要

An illumination device for generating white light is provided. The device includes a converter and a filter. The converter has a Ce:YAG ceramic, which converts blue excitation light into yellow light of a color location near the white point in the chromaticity diagram. The filter attenuates a light fraction below 530 nm so as to obtain the white light.

主权项

1. An illumination device for generating white light, comprising:
a light source that generates blue light; a converter that converts the blue light into yellow light of a color location near a white point in a chromaticity diagram, the converter comprising a material providing conversion of the blue light into the yellow light with a quantum efficiency of more than 70% at operating temperatures in a range from 200° C. to 250° C.; and a filter that attenuates a green light component of the yellow light emitted from the converter to obtain the white light.