Illumination – Plural light sources – Particular wavelength
Reexamination Certificate
2007-07-30
2009-06-16
Husar, Stephen F (Department: 2875)
Illumination
Plural light sources
Particular wavelength
C362S293000, C362S555000, C362S583000, C362S284000, C362S324000, C353S020000, C353S031000
Reexamination Certificate
active
07547114
ABSTRACT:
A multicolor illumination device using an excitation light source and a multi-segmented moving plate with wavelength conversion materials (e.g. phosphors) is disclosed. The exciting light source is a light emitting diode or a laser diode emitting in the UV and/or blue region. The wavelength conversion materials absorb the excitation light and emit longer wavelength light. Each segment of the moving plate contains a different wavelength conversion material or no wavelength conversion material. The plate is supported to move so that different segments are exposed to the excitation light at different times. The plate may be a wheel or rectangular in shape and rotates or oscillates linearly. When the plate moves, light of different colors is generated sequentially in time by the different wavelength conversion materials in different segments of the plate. The multicolor illumination device may be used in a projector system having a microdisplay imager for image display.
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International Search report and Written Opinion in counterpart PCT application No. PCT/US2008/070555, dated Sep. 22, 2008.
Li Yi
Xu Li
Chen Yoshimura LLP
Cranson James W
Husar Stephen F
YLX Corp.
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