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公开(公告)号：US09958765B2
公开(公告)日：2018-05-01
申请号：US15297852
申请日：2016-10-19
Inventor： Michihiro Okuda
CPC classification number: G03B21/208 , G02B5/04 , G02B17/04 , G02B27/0927 , G02B27/0961 , G02B27/141 , G03B21/2013 , G03B21/204
Abstract: A projection image display device includes: laser diodes which emit excitation light; a top-hat diffusing element which diffuses and provides the excitation light with a top-hat intensity distribution; a phosphor which emits light when illuminated by the excitation light diffused by the top-hat diffusing element; an integrator rod which homogenizes the light emitted by the phosphor; DMDs which modulate the light homogenized by the integrator rod; and a projector which projects the light modulated by the DMDs.
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公开(公告)号：US09645481B2
公开(公告)日：2017-05-09
申请号：US15006223
申请日：2016-01-26
Inventor： Takaaki Tanaka , Michihiro Okuda
CPC classification number: G03B21/208 , F21V9/08 , G02B26/007 , G02B27/141 , G03B21/008 , G03B21/204 , G03B21/2073 , H04N9/3114 , H04N9/3158 , H04N9/3167
Abstract: The light source apparatus of the present disclosure includes a solid-state light source, a dichroic mirror for reflecting blue excitation light emitted from the solid-state light source, a phase difference plate for receiving the excitation light reflected on the dichroic mirror, a fluorescent plate having a fluorescent region irradiated with the excitation light, which is reflected on the dichroic mirror and transmitted through the phase difference plate, to emit fluorescent light and a reflection region for reflecting the excitation light, and a plurality of condenser lenses that are disposed between the phase difference plate and the fluorescent plate and condense the excitation light and the fluorescent light. Among the plurality of condenser lenses, the condenser lens closest to the fluorescent plate is made of a glass material having a linear expansion coefficient of 32.5×10−7 or less.
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