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公开(公告)号：US20250044575A1
公开(公告)日：2025-02-06
申请号：US18790882
申请日：2024-07-31
Applicant: SEIKO EPSON CORPORATION
Inventor： Kosuke TABAYASHI , Norikazu KADOTANI
Abstract: A wavelength conversion device includes a rotating plate, a wavelength converter disposed further on the outer side than an opening in a radial direction of the rotating plate, a rotating body coupled to the rotating plate, a driving source configured to rotate the rotating plate and the rotating body centering on a rotation axis, a suction part configured by combining the rotating plate and the rotating body, provided on an inner side of the opening of the rotating plate, and communicating with, via the opening, a space on a side opposite to the driving source with respect to the rotating plate, a plurality of fins rotated together with the rotating plate, and a plurality of flow paths provided among the fins and configured to cause an air flow flowing into an inside of the suction part via the opening to flow to the outside of the rotating body.
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公开(公告)号：US20230314922A1
公开(公告)日：2023-10-05
申请号：US18192823
申请日：2023-03-30
Applicant: SEIKO EPSON CORPORATION
Inventor： Norikazu KADOTANI , Takahiro MIYATA
CPC classification number: G03B21/204 , G03B21/16 , G02F1/13
Abstract: A projector according to the present disclosure includes: a light source device configured to output blue light and fluorescence in time series; a wavelength selection element configured to transmit or reflect the blue light, separate the fluorescence into different colored light, transmit light of one color of the different colored light, and reflect the other colored light; a first liquid crystal panel configured to receive the blue light and the light of one color and output blue image light and image light of one color; a second liquid crystal panel configured to receive the other colored light and output image light of another color; an optical element configured to output the blue image light, the image light of the one color, and the image light of the other color to a common optical path; and a projection optical system.
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公开(公告)号：US20220299851A1
公开(公告)日：2022-09-22
申请号：US17830738
申请日：2022-06-02
Applicant: SEIKO EPSON CORPORATION
Inventor： Norikazu KADOTANI , Takahiro MIYATA
Abstract: A wavelength conversion device includes a rotating device, a substrate rotated by the rotating device, a wavelength conversion element, and a first cooling device including, on an inside, a space in which working fluid is encapsulated, the first cooling device cooling the wavelength conversion element. The first cooling device is disposed in a position corresponding to the wavelength conversion element. The space extends from an outer edge side of the substrate to a rotation axis side. The first cooling device includes an evaporator and a condenser which are provided in the space. The evaporator includes a liquid retaining part configured to retain the working fluid in a liquid phase. The liquid retaining part is provided at the outer edge side in the space and disposed in the position corresponding to the wavelength conversion element.
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公开(公告)号：US20250004358A1
公开(公告)日：2025-01-02
申请号：US18757895
申请日：2024-06-28
Applicant: SEIKO EPSON CORPORATION
Inventor： Norikazu KADOTANI , Kosuke TABAYASHI
Abstract: A wavelength converter according to the present disclosure includes a phosphor irradiated with excitation light, a substrate having a first surface, and a bonding layer that bonds the phosphor to the first surface of the substrate. The bonding layer including an adhesive and a plurality of first fillers mixed with the adhesive, each of the first fillers having a longitudinal axis. The plurality of first fillers are so oriented that a direction along the longitudinal axis of each of the first fillers intersects with the first surface of the substrate. A thermal conductivity of the first fillers is higher than a thermal conductivity of the adhesive.
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公开(公告)号：US20240045255A1
公开(公告)日：2024-02-08
申请号：US18366789
申请日：2023-08-08
Applicant: SEIKO EPSON CORPORATION
Inventor： Norikazu KADOTANI , Yuki NAITO , Tomoaki MIYASHITA , Masanobu NAKANISHI
IPC: G02F1/1333 , H10N10/13
CPC classification number: G02F1/133385 , H10N10/13
Abstract: A temperature adjustment apparatus adjusting a temperature of a liquid crystal panel module, includes a thermoelectric conversion device in contact with the liquid crystal panel module, and a control unit controlling the thermoelectric conversion device, wherein the liquid crystal panel module includes a thermal diffuser having a contact portion in contact with a liquid crystal panel and an extending portion extending from the contact portion and diffusing received heat, the thermoelectric conversion device has a first surface in contact with the extending portion, and a second surface at an opposite side to the first surface, and the control unit is configured to execute warming processing of supplying heat to the thermal diffuser using the thermoelectric conversion device and warming the liquid crystal panel by the heat diffused in the thermal diffuser, and cooling processing of absorbing the heat of the liquid crystal panel transferred to the thermal diffuser.
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Patent Agency Ranking
公开(公告)号：US20220390822A1
公开(公告)日：2022-12-08
申请号：US17830704
申请日：2022-06-02
Applicant: SEIKO EPSON CORPORATION
Inventor： Kosuke TABAYASHI , Norikazu KADOTANI
Abstract: A wavelength conversion device according to the present disclosure includes a wheel substrate, a phosphor layer formed on the wheel substrate, and a cooling fin unit disposed on the wheel substrate. The cooling fin unit has a base part to be bonded to the wheel substrate. A surface of the wheel substrate includes a first area corresponding to the phosphor layer, and a second area located closer to the central axis than the first area, the surface of the wheel substrate and a surface at the wheel substrate side of the base part are separated from each other to form a space between the wheel substrate and the base part, and a coupling part configured to thermally couple the surface of the wheel substrate and the surface at the wheel substrate side of the base part is disposed in at least the second area of the second surface.
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公开(公告)号：US20170357149A1
公开(公告)日：2017-12-14
申请号：US15541446
申请日：2015-12-09
Applicant: SEIKO EPSON CORPORATION
Inventor： Norikazu KADOTANI , Keita TSUKIOKA
CPC classification number: G03B21/145 , G03B21/006 , G03B21/16 , G03B33/12 , H04N9/3144
Abstract: A projector includes an exterior housing including an exhaust port and a cooling device provided in the exterior housing and configured to discharge the air, which has cooled a cooling target, to the outside of the exterior housing via the exhaust port. The exterior housing includes a partition member that partitions the exhaust port and forms a plurality of openings. The partition member includes projecting sections projecting from an end edge of at least one of the plurality of openings into the opening.
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公开(公告)号：US20240069374A1
公开(公告)日：2024-02-29
申请号：US18387635
申请日：2023-11-07
Applicant: SEIKO EPSON CORPORATION
Inventor： Norikazu KADOTANI
IPC: G02F1/1333 , G03B21/16 , H04N9/31
CPC classification number: G02F1/133385 , G03B21/16 , H04N9/3144
Abstract: A transmissive liquid crystal panel includes a pixel region where a plurality of pixels are arrayed, a liquid crystal layer configured to modulate light for the plurality of pixels, an incident section configured to make the light incident on liquid crystal layer, an emission section configured to emit, as image light, the light modulated by liquid crystal layer, and a vapor chamber including an opening section corresponding to pixel region, a heat receiving section provided around the opening section, and a heat radiating section configured to radiate heat received by heat receiving section, the vapor chamber vaporizing, with the heat received by heat receiving section, a coolant in a liquid phase encapsulated on an inside of the vapor chamber and radiating, with the heat radiating section, heat of the coolant in a gas phase to thereby condense the coolant in the gas phase into the coolant in the liquid phase.
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公开(公告)号：US20240027883A1
公开(公告)日：2024-01-25
申请号：US18224692
申请日：2023-07-21
Applicant: SEIKO EPSON CORPORATION
Inventor： Kosuke TABAYASHI , Norikazu KADOTANI
CPC classification number: G03B21/16 , G02B26/008 , G03B21/204
Abstract: A wavelength conversion device includes a rotating body having a disk-like shape, a wavelength converter disposed in a portion at circumferential edge side of the rotating body so as to form a ring-like shape centering on a rotational axis of the rotating body, and a motor configured to rotate the rotating body, wherein the rotating body includes a vapor chamber, the vapor chamber includes a sealed container configured to contain a working fluid changing in phase between a vapor phase and a liquid phase, the sealed container includes a heat receiver which is arranged in an outer circumferential part of the sealed container, and which is configured to receive heat of the wavelength converter, and a heat dissipater which is arranged at the rotational axis side of the heat receiver, and which is configured to release the heat received by the heat receiver.
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公开(公告)号：US20230324777A1
公开(公告)日：2023-10-12
申请号：US18192854
申请日：2023-03-30
Applicant: SEIKO EPSON CORPORATION
Inventor： Takahiro MIYATA , Norikazu KADOTANI
CPC classification number: G03B21/204 , G03B21/006
Abstract: A projector the present disclosure includes: a first liquid crystal panel output image light of a first color and image light of a second color in time series; a second liquid crystal panel output image light of a third color; and a light source devicesupplied first colored light, second colored light, and third colored light, and having a solid light source emitted the first colored light and a wavelength conversion element. A ratio between output periods of the first colored light and the converted light is the same as a ratio between output periods of the image light of the first color and the image light of the second color at a frame rate, and an output intensity of the first colored light is set according to an output intensity of the converted light based on the ratio between the output periods of the first colored light and the converted light.
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