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1.发明授权公开(公告)号：US10921697B2
公开(公告)日：2021-02-16
申请号：US16386883
申请日：2019-04-17
Inventor： Takashi Ikeda , Makoto Maeda , Yusaku Nishikawa
Abstract: A wavelength conversion element includes a first phosphor region and a second phosphor region. The second phosphor region is disposed in a thickness direction of the first phosphor region and has a phosphor particle with a particle size different from a particle size of a phosphor particle positioned in the first phosphor region.
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公开(公告)号：US12088969B2
公开(公告)日：2024-09-10
申请号：US17575132
申请日：2022-01-13
Inventor： Makoto Maeda , Sosuke Otani
CPC classification number: H04N9/3152 , H04N9/3158 , H04N9/3164
Abstract: This projection display device includes: a light source unit emitting a white light along a first optical axis; a lighting unit provided on a second optical axis, the lighting unit splitting the white light into predetermined color lights and uniformizing an illuminance distribution of the predetermined color lights; an image generator including a display element modulating the predetermined color lights, and a projection lens projecting an image light including the predetermined color lights modulated along a third optical axis; at least one optical path switching unit selectively switching between reflection and transmission of the white light; a light diffuser including a diffusion optical system spreading the white light to a desired illumination area and projecting the spread white light as an illumination light; and a controller causing the at least one optical path switching unit to switch between emission of the image light and emission of the illumination light.
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公开(公告)号：US20240248385A1
公开(公告)日：2024-07-25
申请号：US18624778
申请日：2024-04-02
Inventor： Takashi Ikeda , Yoshiki TANAKA , Makoto Maeda , Yusaku Nishikawa , Manabu Okuno
CPC classification number: G03B21/2073 , G03B21/142 , G03B21/2066 , G03B33/12
Abstract: A light source device includes: a light source element emitting first light; a first selective reflection element disposed at a position where the first light is incident, the first selective reflection element transmitting a component of first linear polarized light and reflecting a component of second linear polarized light; a second selective reflection element disposed at a position for receiving incident light that has passed through or been reflected by the first selective reflection element, the second selective reflection element transmitting or reflecting the incident light in accordance with a wavelength region; and a first polarization direction conversion element disposed between the first and second selective reflection element, the first polarization direction conversion element converting the first linear polarized light into elliptical polarized light. The first polarization direction conversion element converts the elliptical polarized light reflected by the second selective reflection element into the second linear polarized light.
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公开(公告)号：US11163226B2
公开(公告)日：2021-11-02
申请号：US17027869
申请日：2020-09-22
Inventor： Makoto Maeda
Abstract: A light source system includes an excitation light source, a fluorescent plate that emits fluorescence when exposed to the excitation light from the excitation light source, and a compartment storing the fluorescent plate. The compartment has a heat-receiving section and a heat-dissipation section thermally connected to each other. The heat-receiving section is located opposite a fluorescence light output side of the fluorescent plate, in the compartment. The heat-dissipation section is outside the compartment.
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Patent Agency Ranking
公开(公告)号：US20240248384A1
公开(公告)日：2024-07-25
申请号：US18625786
申请日：2024-04-03
Inventor： Yoshiki Tanaka , Takashi Ikeda , Manabu Okuno , Makoto Maeda
IPC: G03B21/20
CPC classification number: G03B21/204 , G03B21/2013 , G03B21/2066 , G03B21/2073 , G03B21/208
Abstract: A light source device includes a light source element that emits light source light in a first wavelength region, a selective reflection element that separates the light source light into first light and second light, a first light direction conversion element that reflects the first light guided in a first direction from the selective reflection element in a second direction, and a wavelength conversion element that converts the first light into third light in a second wavelength region. The first light direction conversion element reflects the third light in a third direction opposite to the first direction. The selective reflection element transmits the third light reflected by the first light direction conversion element. The selective reflection element guides the second light and the third light in the third direction. The light source element emits the light source light in a direction different from the second direction.
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公开(公告)号：US10816883B2
公开(公告)日：2020-10-27
申请号：US15800076
申请日：2017-11-01
Inventor： Makoto Maeda
Abstract: A light source system includes an excitation light source, a fluorescent plate that emits fluorescence when exposed to the excitation light from the excitation light source, and a compartment storing the fluorescent plate. The compartment has a heat-receiving section and a heat-dissipation section thermally connected to each other. The heat-receiving section is located opposite a fluorescence light output side of the fluorescent plate, in the compartment. The heat-dissipation section is outside the compartment.
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公开(公告)号：US10782601B2
公开(公告)日：2020-09-22
申请号：US15453339
申请日：2017-03-08
Inventor： Makoto Maeda
Abstract: A light source device includes a solid light source, a transmissive fluorescent plate having a phosphor that is excited by excitation light for emitting fluorescent light in a traveling direction of the excitation light, and a color filter plate that cuts a part of a wavelength region of light supplied from the fluorescent plate for trimming the light into desirable color light. The light source device further includes a first reflective film disposed on a light path extending from the fluorescent plate to the color filter plate for reflecting at least a part of the excitation light.
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8.发明授权公开(公告)号：US11442348B2
公开(公告)日：2022-09-13
申请号：US17141503
申请日：2021-01-05
Inventor： Takashi Ikeda , Makoto Maeda , Yusaku Nishikawa
Abstract: A wavelength conversion element includes a first phosphor region and a second phosphor region. The second phosphor region is disposed in a thickness direction of the first phosphor region and has a phosphor particle with a particle size different from a particle size of a phosphor particle positioned in the first phosphor region.
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公开(公告)号：US10802385B2
公开(公告)日：2020-10-13
申请号：US16043313
申请日：2018-07-24
Inventor： Makoto Maeda
Abstract: A phosphor plate includes: a plate substrate, a reflection coating provided on a surface of the plate substrate, a reflecting layer provided on the reflection coating, and composed of metallic oxide and transparent binder, and a phosphor layer provided on the reflecting layer. The reflecting layer has a thickness ranging from 10 μm to 90 μm inclusive, and the metallic oxide is contained in the reflecting layer at a volume density ranging from 15 vol % to 40 vol %.
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