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公开(公告)号：US11882639B2
公开(公告)日：2024-01-23
申请号：US17605515
申请日：2020-04-21
Inventor： Kenta Watanabe , Yoshihiko Ishida , Hisao Kataoka , Hiroshi Sugimoto
IPC: H05B47/155 , H05B47/125 , H05B47/175
CPC classification number: H05B47/125 , H05B47/155 , H05B47/175
Abstract: An illumination control system includes an illumination device including light sources, and an illumination control device which is capable of individually controlling light emission of the light sources and includes: a measurer which obtains space information regarding a space in which the illumination device is to be installed and position information indicating a position at which the illumination device is to be installed inside the space; an information transmitter which transmits control information to the illumination device; and an information processor which optimizes control information for controlling a lighting mode of each of the light sources, according to an installation condition of the illumination device indicated in the space information and the position information.
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公开(公告)号：US10698307B2
公开(公告)日：2020-06-30
申请号：US16221120
申请日：2018-12-14
Inventor： Kenta Watanabe
Abstract: A wavelength conversion device is provided. The wavelength conversion device includes a light-transmissive substrate that includes an incidence surface and an emission surface opposite the incidence surface. The light-transmissive substrate is configured to receive, by the incidence surface, excitation light and emit, from the emission surface, the excitation light. A phosphor layer is configured to emit fluorescent light when excited by the excitation light emitted from the emission surface. The phosphor layer includes a first phosphor layer and a second phosphor layer. The first phosphor layer includes first phosphor particles. The second phosphor layer includes second phosphor particles configured to emit fluorescent light including a peak wavelength longer than a peak wavelength of fluorescent light emitted by the first phosphor particles. The first phosphor layer includes a refractive index different from a refractive index of the second phosphor layer.
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公开(公告)号：US10574950B2
公开(公告)日：2020-02-25
申请号：US15947320
申请日：2018-04-06
Inventor： Kenta Watanabe
Abstract: A wavelength conversion device includes: a substrate; and a phosphor layer on the substrate. The phosphor layer includes: a base material; and a first phosphor and a second phosphor each of which emits fluorescent light when excited by excitation light. Where chromaticity coordinates of the fluorescent light emitted by the first phosphor and chromaticity coordinates of the fluorescent light emitted by the second phosphor are (x1, y1) and (x2, y2), respectively, −0.02≤x1−x2≤0.02 and −0.02≤y1−y2≤0.02 are satisfied. A peak wavelength of an excitation spectrum of the first phosphor is different from a peak wavelength of an excitation spectrum of the second phosphor.
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公开(公告)号：US09785039B2
公开(公告)日：2017-10-10
申请号：US14832117
申请日：2015-08-21
Inventor： Atsushi Motoya , Kenta Watanabe , Ran Zheng , Sachiko Azuma , Yoshihisa Nagasaki , Takahiro Hamada , Mitsuru Nitta , Takashi Maniwa , Toshio Mori , Kazuhiro Matsuo
CPC classification number: G03B21/204 , G02B27/141 , G03B21/2066 , H01L2933/0041 , H01S5/0092
Abstract: A wavelength conversion member includes a substrate, a dichroic mirror layer, an SiO2 layer, a ZnO layer, and a phosphor layer, which are sequentially stacked from the substrate. The dichroic mirror layer reflects at least part of light incident from the above. The phosphor layer includes a plurality of phosphors and ZnO between the phosphors.
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