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公开(公告)号：USRE48753E1
公开(公告)日：2021-09-28
申请号：US16369397
申请日：2019-03-29
Inventor： Michihiro Okuda
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：US09740014B2
公开(公告)日：2017-08-22
申请号：US15004087
申请日：2016-01-22
Inventor： Michihiro Okuda
CPC classification number: G02B27/141 , G02B26/008 , G03B21/2013 , G03B21/204 , G03B21/2066 , G03B33/06 , H04N9/3105 , H04N9/3158 , H04N9/3161
Abstract: A projection display apparatus includes: a laser light source which emits a blue light; a wheel which includes a light emitting body provided on a reflection surface of a substrate, the light emitting body emitting an emission light when the emitting body is irradiated with the blue light; a bandpass filter which is disposed on an optical path on which the emission light of the light emitting body travels; a plurality of optical modulating elements which modulate the blue light and the emission light from the light emitting body; and a projection unit which projects the light modulated by the plurality of optical modulating elements. The bandpass filter allows transmission of part of lights whose wavelength bands are 560 nm to 590 nm in the emission light of the light emitting body, and reflects other lights.
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公开(公告)号：US11550213B2
公开(公告)日：2023-01-10
申请号：US17835228
申请日：2022-06-08
Inventor： Aya Kurita , Michihiro Okuda
Abstract: The light source device includes a first solid-state light source array emitting a first color light, a second solid-state light source array emitting a second color light, a third solid-state light source array emitting a third color light, and a light combiner for combining the first to third color lights respectively from the first to third solid-state light source arrays into a combined color light, and emitting a light flux of the combined color light in the same direction. The third solid-state light source array requiring the lowest target cooling temperature among the first to third solid-state light source arrays is disposed on a first side, and the first and second solid-state light source arrays are disposed on a second side, with an optical axis of the light flux emitted from the light combiner, as a boundary.
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公开(公告)号：US11385535B2
公开(公告)日：2022-07-12
申请号：US17128873
申请日：2020-12-21
Inventor： Aya Kurita , Michihiro Okuda
Abstract: The light source device includes a first solid-state light source array emitting a first color light, a second solid-state light source array emitting a second color light, a third solid-state light source array emitting a third color light, and a light combiner for combining the first to third color lights respectively from the first to third solid-state light source arrays into a combined color light, and emitting a light flux of the combined color light in the same direction. The third solid-state light source array requiring the lowest target cooling temperature among the first to third solid-state light source arrays is disposed on a first side, and the first and second solid-state light source arrays are disposed on a second side, with an optical axis of the light flux emitted from the light combiner, as a boundary.
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公开(公告)号：US10154252B2
公开(公告)日：2018-12-11
申请号：US15284276
申请日：2016-10-03
Inventor： Shigekazu Yamagishi , Michihiro Okuda
IPC: H04N9/31 , H04N13/31 , H04N13/32 , H04N13/334 , H04N13/337 , H04N13/363 , H04N13/365 , H04N13/398
Abstract: A projection-type image display apparatus of the present disclosure includes a fluorescent substance, a blue-color laser diode excitation optical system, a DMD, a projection optical system, a polarizing plate, and a depolarizing plate. The fluorescent substance has characteristics of emitting predetermined fluorescence in response to excitation light. The blue-color laser diode has a semiconductor laser that emits laser light of a wavelength with which the fluorescent substance is excited. The excitation optical system condenses light from the blue-color laser diode. The DMD is controllable by a signal from an external source. The projection optical system is an optical system that can enlarge and project an image displayed by the DMD. The polarizing plate is disposed on the output side of the projection optical system.
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Patent Agency Ranking
公开(公告)号：US09891514B2
公开(公告)日：2018-02-13
申请号：US15008197
申请日：2016-01-27
Inventor： Michihiro Okuda , Hiroshi Kitano
CPC classification number: G03B21/2066 , G03B21/2033
Abstract: A light source apparatus and a projection display apparatus according to the present disclosure include: a laser light source; and a multiplexing reflection mirror having a first surface on which a partial reflection coating having a predetermined reflectance is formed, and a second surface on which a total reflection coating is formed, the first surface and the second surface being opposite to each other and formed in a parallel flat shape. The multiplexing reflection mirror is disposed so as to incline toward an optical path of an emission light from the laser light source such that the emission light is incident from first surface.
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公开(公告)号：US09874805B2
公开(公告)日：2018-01-23
申请号：US15008187
申请日：2016-01-27
Inventor： Michihiro Okuda
CPC classification number: G03B21/204 , G02B26/008 , G02B26/0833 , G02B27/141 , G02B27/149 , G03B21/2013 , G03B21/2066
Abstract: A light source apparatus according to the present disclosure includes: a first light source unit which emits a blue light in a first direction; a second light source unit which emits a blue light in a second direction which intersects with the first direction; a split/combining optical element which splits the blue lights emitted from the first light source unit and the second light source unit, into a first optical path and a second optical path; a light emitting body which is provided on the first optical path and emits an emission light in response to an excitation light; and a combining optical element which combines the first optical path and the second optical path into one optical path.
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公开(公告)号：US10353281B2
公开(公告)日：2019-07-16
申请号：US15899443
申请日：2018-02-20
Inventor： Michihiro Okuda
Abstract: The projection display apparatus according to the present disclosure includes: a light source part; a color separating mirror that separates light emitted from the light source part into a first color light and a second color light; a first light modulation element that modulates the first color light; a second light modulation element that modulates the second color light; a color combining prism unit that combines the first color light modulated by the first light modulation element and the second color light modulated by the second light modulation element; and a projection unit that projects combined light emitted from the color combining prism unit. The color combining prism unit includes four prisms and has two air gap faces that totally reflect or transmit light depending on the angle of incidence.
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公开(公告)号：US10146114B2
公开(公告)日：2018-12-04
申请号：US15497195
申请日：2017-04-25
Inventor： Michihiro Okuda , Manabu Okuno
Abstract: A projection display apparatus of the present disclosure includes a solid state light source discharging blue light in a first wavelength range; a wheel having a transmission part transmitting blue light and a first light-emitting body emitting light in response to irradiation with blue light; a second light-emitting body emitting light in a second wavelength range closer to the longer wavelengths than the first wavelength range is and adjacent to the first wavelength range, in response to irradiation with blue light that has passed through the transmission part; a light uniformizing element uniformizing the blue light and the light emitted from the first and second light-emitting body; a light modulation element modulating the light uniformized by the light uniformizing element; and projection unit projecting the light modulated by the light modulation element.
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公开(公告)号：US10133164B2
公开(公告)日：2018-11-20
申请号：US15590093
申请日：2017-05-09
Inventor： Michihiro Okuda
Abstract: A projection display apparatus of the present disclosure includes a solid state light source that emits blue light in a first wavelength range; a wheel having a light-emitting body that emits emission light in a second wavelength range closer to the longer wavelengths than the first wavelength range is and adjacent to the first wavelength range, in response to irradiation with the blue light; a light uniformizing element that uniformizes the blue light and the emission light; a light modulation element that modulates light uniformized by the light uniformizing element; and a projection unit that projects the light modulated by the light modulation element. An end of the light-emitting body that the blue light enters has a dichroic coating that partly reflects the blue light and transmits emission light.
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