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公开(公告)号：US11193640B2
公开(公告)日：2021-12-07
申请号：US16472963
申请日：2017-12-28
Applicant: Dai Nippon Printing Co., Ltd.
Inventor： Shumpei Nishio , Makio Kurashige
Abstract: An illumination device (10) includes: laser light sources (20) having different radiant fluxes; and diffractive optical elements (40) provided correspondingly to the respective laser light sources. A planar dimension of the diffractive optical element, which corresponds to the laser light source that emits a laser light having a minimum radiant flux, is smaller than a planar dimension of the diffractive optical element, which corresponds to the laser light source that emits a laser light having a maximum radiant flux.
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公开(公告)号：US10400997B2
公开(公告)日：2019-09-03
申请号：US15777291
申请日：2016-11-18
Applicant: Dai Nippon Printing Co., Ltd.
Inventor： Makio Kurashige , Shumpei Nishio
IPC: F21V17/02 , F21V13/06 , F21S2/00 , F21V5/04 , F21V9/00 , F21V14/04 , G02B5/02 , G02B5/32 , G02B26/12 , F21V5/00 , F21V23/00 , G03H1/02
Abstract: An illumination device including a light source; a light scanner for changing a light path of light-source light; a light diffusion device having element diffusion devices; and a light-path adjustment device disposed on a light path of the light-source light, the light-path adjustment device having element adjustment devices corresponding to respective element diffusion devices, adjusting a light path of the light-source light. An incident position of the light-source light on the light-path adjustment device varies depending on a light path determined by the light scanner. An incident angle of the light-source light on each element diffusion device varies depending on an incident position on the element adjustment device corresponding to the element diffusion device. An emergent angle from each element diffusion device varies depending on the incident angle on the element diffusion device. Each element diffusion device illuminates an element illumination area corresponding to the element diffusion device.
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公开(公告)号：US11940139B2
公开(公告)日：2024-03-26
申请号：US17622888
申请日：2020-06-29
Applicant: DAI NIPPON PRINTING CO., LTD.
Inventor： Shumpei Nishio , Toshiyuki Nakai , Makio Kurashige
IPC: F21V3/00 , F21V5/00 , G02B26/10 , F21Y113/10 , F21Y115/30
CPC classification number: F21V3/00 , F21V5/008 , G02B26/101 , F21Y2113/10 , F21Y2115/30
Abstract: A lighting device (1) include a light source (2) that emits coherent light, a scanner (5) that causes the coherent light emitted from the light source to move, a first optical system (6) that regulates an optical path of the coherent light from the scanner, a first optical member (7) that causes the coherent light from the first optical system to diffuse, and a second optical system (8) that regulates an optical path of the coherent light from the first optical member. A lighting zone (LZ) on a plane of projection (PP) is illuminated with the coherent light emitted from the second optical system. An irradiance [W/m2] in a plane orthogonal to an optical axis of the coherent light irradiated on the lighting zone is non-discrete.
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公开(公告)号：US11549664B2
公开(公告)日：2023-01-10
申请号：US17297103
申请日：2019-11-29
Applicant: DAI NIPPON PRINTING CO., LTD.
Inventor： Shumpei Nishio , Kaori Nakatsugawa , Makio Kurashige , Kazutoshi Ishida
IPC: F21L4/00 , F21V14/06 , F21Y115/30
Abstract: A portable lighting device includes: a coherent light source; a shaping optical system that shapes coherent light emitted from the coherent light source; and a diffractive optical element that diffracts the coherent light shaped by the shaping optical system to a surface to be irradiated (IP). The diffractive optical element is rotatably supported. The surface to be irradiated is lighted in a pattern depending on a diffraction pattern of the diffractive optical element.
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公开(公告)号：US11359785B2
公开(公告)日：2022-06-14
申请号：US17448359
申请日：2021-09-22
Applicant: Dai Nippon Printing Co., Ltd.
Inventor： Shumpei Nishio , Makio Kurashige
Abstract: An illumination device includes: laser light sources having different radiant fluxes; and diffractive optical elements provided correspondingly to the respective laser light sources. A planar dimension of the diffractive optical element, which corresponds to the laser light source that emits a laser light having a minimum radiant flux, is smaller than a planar dimension of the diffractive optical element, which corresponds to the laser light source that emits a laser light having a maximum radiant flux.
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Patent Agency Ranking
公开(公告)号：US11505111B2
公开(公告)日：2022-11-22
申请号：US17451206
申请日：2021-10-18
Applicant: Dai Nippon Printing Co., Ltd.
Inventor： Shumpei Nishio , Makio Kurashige , Kaori Nakatsugawa , Tomoe Sato
Abstract: An illumination apparatus that illuminates an illumination zone having a first direction and a second direction crossing the first direction is provided with a light source to emit a coherent light beam, and a diffraction optical device to diffract the coherent light beam incident from the light source. The diffraction optical device diffracts the incident coherent light beam so that a width of the illumination zone in the second direction gradually becomes wider along the first direction of the illumination zone from a nearer side to the diffraction optical device.
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公开(公告)号：US11092305B2
公开(公告)日：2021-08-17
申请号：US16609556
申请日：2018-05-18
Applicant: Dai Nippon Printing Co., Ltd.
Inventor： Shumpei Nishio , Makio Kurashige
IPC: G03H1/32 , F21S41/16 , F21S41/675 , F21S41/40 , F21S41/20 , G02B5/32 , F21W102/135
Abstract: A coherent light beam from a light source is scanned by a scanning member and is incident to a light receiving surface of a light diffusing element. The incident light beam is emitted as diffused light, passes through an illumination optical system, and forms a drawing spot on an illumination target surface. When a scan control unit controls scanning of the light beam, an illumination area is formed by the moving drawing spot on the illumination target surface.
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公开(公告)号：US10773636B2
公开(公告)日：2020-09-15
申请号：US16309241
申请日：2017-06-13
Applicant: Dai Nippon Printing Co., Ltd.
Inventor： Shumpei Nishio , Makio Kurashige , Kaori Nakatsugawa , Tomoe Sato
Abstract: An illumination apparatus that illuminates an illumination zone having a first direction and a second direction crossing the first direction is provided with a light source to emit a coherent light beam, and a diffraction optical device to diffract the coherent light beam incident from the light source. The diffraction optical device diffracts the incident coherent light beam so that a width of the illumination zone in the second direction gradually becomes wider along the first direction of the illumination zone from a nearer side to the diffraction optical device.
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公开(公告)号：US10754168B2
公开(公告)日：2020-08-25
申请号：US16398561
申请日：2019-04-30
Applicant: Dai Nippon Printing Co., Ltd.
Inventor： Makio Kurashige , Kaori Nakatsugawa , Shumpei Nishio
IPC: G02B27/48 , F21S41/00 , B60Q1/14 , G02B3/00 , G02B5/02 , H05B47/16 , H05B47/105 , F21V5/00 , F21V13/04 , F21V14/04 , G02B5/32 , G03B1/00 , H04N5/00 , B60Q1/04 , G03H1/04
Abstract: An illumination device has a coherent light source, an optical device that diffuses the plurality of coherent light beams and illuminates a predetermined illumination area, and a timing control unit that individually controls incident timing of the plurality of coherent light beams to the optical device or illumination timing of the illumination area, wherein the optical device has a plurality of diffusion regions, the diffusion regions being provided corresponding to the plurality of coherent light beams, the plurality of diffusion regions illuminate the illumination range by diffusion of incident coherent light beams, the plurality of diffusion regions have a plurality of element diffusion regions, the plurality of element diffusion regions illuminate partial regions in the illumination area by diffusion of incident coherent light beams, and at least parts of the partial regions illuminated by the plurality of element diffusion regions are different from one another.
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公开(公告)号：US12038147B2
公开(公告)日：2024-07-16
申请号：US18278452
申请日：2022-02-07
Applicant: DAI NIPPON PRINTING CO., LTD.
Inventor： Makio Kurashige , Shumpei Nishio
IPC: F21S43/20 , F21V5/04 , F21W103/60 , F21Y113/00
CPC classification number: F21S43/26 , F21V5/04 , F21W2103/60 , F21Y2113/30
Abstract: A lighting system includes a projection surface and a lighting device that projects a projection pattern on the projection surface and includes a light source emitting coherent light and a diffractive optical element diffracting the coherent light to form the projection pattern and including fundamental pieces of diffractive optical element two-dimensionally arranged in a direction parallel to the projection surface. A fundamental period of spatial resolution r (on the projection surface and determined from a specified spatial resolution of the projection pattern at an intersection position of a perpendicular line drawn from a center of certain one of the fundamental pieces of diffractive optical element with respect to the projection surface), an angle θ (a half of an angle projecting the fundamental piece of diffractive optical element at the position), and a wavelength λ of light in the projection pattern projected at the position) satisfy sin θ>λ/(6r).
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