High brightness light source using light emitting devices of...

Details High brightness light source using light emitting devices of... High brightness light source using light emitting devices of...

2007-06-13

2010-06-29

Truong, Bao Q (Department: 2875)

Illumination

Plural light sources

Particular wavelength

C362S084000, C362S235000, C362S583000

Reexamination Certificate

active

07744241

ABSTRACT:
A wavelength division multiplexer and etendue conserved optics are used to combine multiple wavelength LED lights into a combined light. The combined light, with higher intensity and higher power than the light from an individual LED, is used to excite a wavelength conversion material such as phosphors to generate a high brightness and high power light. Light generated by multiple LEDs of the same wavelength may be coupled into a optical fiber bundle before inputting it into the wavelength-division multiplexer, further increasing the brightness and power. The wavelength conversion material may generate light of three different color under excitation by different LED lights, or a white light with higher brightness and higher power. Such a light source can be used in image display devices such as a projector or in illumination systems.

REFERENCES:
patent: 7070300 (2006-07-01), Harbers et al.
patent: 7415210 (2008-08-01), Gurevich et al.
patent: 2007/0047608 (2007-03-01), Volodin et al.
patent: 2006/102846 (2006-10-01), None

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