Remote wavelength conversion in an illumination device

Details Remote wavelength conversion in an illumination device Remote wavelength conversion in an illumination device

2006-07-04

2006-07-04

O'Shea, Sandra (Department: 2875)

Illumination

Plural light sources

Particular wavelength

C362S019000, C362S293000

Reexamination Certificate

active

07070300

ABSTRACT:
An illumination device uses a wavelength converting element, such as a phosphor layer, that is physically separated from a light source, such as one or more light emitting diodes, a Xenon lamp or a Mercury lamp. The wavelength converting element is optically separated from the light source, so that the converted light emitted by the wavelength converting element is prevented from being incident on the light source. Accordingly, the temperature limitations of the wavelength converting element are removed, thereby permitting the light source to be driven with an increased current to produce a higher radiance. Moreover, by optically separating the wavelength converting element from the light source, the conversion and recycling efficiency of the device is improved, which also increases radiance.

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