Light source device and projection display apparatus
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United States of America Patent
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Nov 25, 2014
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app pub date -
Apr 20, 2012
filing date -
Apr 20, 2011
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Abstract
A solid-state light source unit emits excitation light. Fluorescent material layer is formed on each side of a glass substrate of a fluorescent plate so as to interpose a reflective film therebetween. The first optical system optically guides, to a rod integrator, red and blue LED light, and green fluorescence that is generated by excitation occurring when blue laser light emitted from the solid-state light source unit is applied to the fluorescent material layer on one surface of the fluorescent plate, and that is emitted in the −X direction. The second optical system optically guides, to the rod integrator, red and blue LED light, and green fluorescence that is generated by excitation occurring when blue laser light emitted from the solid-state light source unit is applied to the fluorescent material layer on the other surface of the fluorescent plate, and that is emitted in the +X direction.
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