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公开(公告)号：US20230305376A1
公开(公告)日：2023-09-28
申请号：US18191051
申请日：2023-03-28
Applicant: SEIKO EPSON CORPORATION
Inventor： Shoichi UCHIYAMA , Chigusa TAKAGI , Tomoko AKAGAWA , Tetsuo SHIMIZU , Ryota TATSUMI
IPC: G03B21/20
CPC classification number: G03B21/204 , G03B21/2066 , G03B21/208
Abstract: A light source apparatus includes a first laser light emitter that emits first light, a wavelength converter that converts the first light into second light, a base including a first support part that supports the first laser light emitter, and a second support part that supports the wavelength converter, a light transmissive member that has first and second surfaces, the first light being incident on the first surface, a first reflector that is disposed at the second surface and reflects the first light toward the wavelength converter, and a light collection optical element that collects light emitted from the wavelength converter. A first distance along an optical axis of the light collection optical element between the wavelength converter and the light collection optical element is shorter than a second distance along the optical axis between the first laser light emitter and the light collection optical element.
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公开(公告)号：US20220299855A1
公开(公告)日：2022-09-22
申请号：US17698606
申请日：2022-03-18
Applicant: SEIKO EPSON CORPORATION
Inventor： Koya SHIRATORI , Mizuha HIROKI , Tetsuo SHIMIZU
Abstract: A wavelength conversion element includes a substrate, reflection layer on the substrate, wavelength conversion layer in the reflection layer and converting a light in a first wavelength range into a light in a second wavelength range, structure in the wavelength conversion layer and scattering a part of the light in the first wavelength range, and optical layer in the structure, reflecting a part of the light in the first wavelength range, transmitting another part of the light in the first wavelength range, and transmitting the light in the second wavelength range. The structure includes a first structure portion, second structure portion, and planar portion between the first and second structure portions, the optical layers in the first and second structure portions have first reflectance for the light in the first wavelength range, and the optical layer in the planar portion has second reflectance.
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公开(公告)号：US20180246400A1
公开(公告)日：2018-08-30
申请号：US15892570
申请日：2018-02-09
Applicant: SEIKO EPSON CORPORATION
Inventor： Kunihiko TAKAGI , Tetsuo SHIMIZU
IPC: G03B21/20
CPC classification number: G03B21/2066 , G03B21/204 , G03B21/2053 , G03B21/208 , G03B21/2093
Abstract: The color separation/light combining element included in an illuminator has at least one first region and at least one second region. The light ray flux contains a first light ray flux outputted from the first light emission unit and a second light ray flux outputted from the second light emission unit. a wavelength conversion element, a diffusive reflection element, and the color separation/light combining element are so disposed that part of the first light ray flux is incident on the diffusive reflection element via the first region, the other part of the first light ray flux is incident on the wavelength conversion element via the first region, a part of the second light ray flux is incident on the wavelength conversion element via the second region, and the second region combines the converted light with a part of light reflected off the diffusive reflection element to produce illumination light.
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公开(公告)号：US20170227836A1
公开(公告)日：2017-08-10
申请号：US15419275
申请日：2017-01-30
Applicant: SEIKO EPSON CORPORATION
Inventor： Kunihiko TAKAGI , Tetsuo SHIMIZU
CPC classification number: G03B21/204 , F21V13/14 , G02B27/141 , G02B27/283 , G03B21/005 , G03B21/2066
Abstract: A wavelength conversion element includes: a wavelength conversion layer; a light-transmissive member provided on a light-incident surface side of the wavelength conversion layer and including a support surface including an inclined portion inclined with respect to the light-incident surface; and a first reflection portion provided along the support surface and reflecting fluorescence light. The first reflection portion includes a dichroic film that transmits excitation light. The excitation light passes through the dichroic film and the light-incident surface in this order to enter the wavelength conversion layer. Defining a plane including the light-incident surface as a reference surface, a distance between the reference surface and the first reflection portion in a periphery region of the first reflection portion is smaller than a distance between the reference surface and the first reflection portion in a central region of the first reflection portion.
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公开(公告)号：US20200064721A1
公开(公告)日：2020-02-27
申请号：US16547698
申请日：2019-08-22
Applicant: SEIKO EPSON CORPORATION
Inventor： Tetsuo SHIMIZU , Wataru Yasumatsu
Abstract: A light source apparatus according to an aspect of the present disclosure includes a substrate having a first surface, a frame, a lid with which the frame is provided, a light emitter that is accommodated in an accommodation space, a wavelength converter that is provided at the substrate, is accommodated in the accommodation space, converts first light emitted from the light emitter into second light having a wavelength different from the wavelength of the first light, and outputs the second light, and a first optical film that is provided in the light path between the light emitter and the wavelength converter, transmits one of the first light and the second light, and reflects the other one of the first light and the second light, and the light emitter emits the first light in such a way that the chief ray of the first light travels along the first surface.
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Patent Agency Ranking
公开(公告)号：US20190302592A1
公开(公告)日：2019-10-03
申请号：US16365790
申请日：2019-03-27
Applicant: SEIKO EPSON CORPORATION
Inventor： Tetsuo SHIMIZU , Akira EGAWA
Abstract: A wavelength converter to which the invention is applied includes a phosphor that converts the wavelength of blue light to emit fluorescence, a rotating mechanism that rotates the phosphor around an axis of rotation that extends in a light incident direction in which the blue light is incident, and a heat insulating member that is provided between the phosphor and the rotating mechanism in the light incident direction. The phosphor has a coinciding section that coincides with the rotating mechanism when viewed in the light incident direction.
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公开(公告)号：US20230305379A1
公开(公告)日：2023-09-28
申请号：US18191072
申请日：2023-03-28
Applicant: SEIKO EPSON CORPORATION
Inventor： Chigusa TAKAGI , Shoichi UCHIYAMA , Tetsuo SHIMIZU , Tomoko AKAGAWA , Ryota TATSUMI
IPC: G03B21/20
CPC classification number: G03B21/204 , G03B21/2066
Abstract: A light source device includes a first laser emitter configured to emit first light, a light transmissive member having a first surface and a second surface, the first light emitted from the first laser emitter being incident on the second surface, a base having a first support part configured to support the first laser emitter and a second support part configured to support the light transmissive member, and a wavelength converter arranged on the first surface and configured to convert the first light into second light. The wavelength converter has an incident surface including an incident area where the first light enters and an emission surface disposed at an opposite side to the incident surface and configured to emit the second light. The second support part supports the second surface of the light transmissive member in an area corresponding to the incident area.
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公开(公告)号：US20220299854A1
公开(公告)日：2022-09-22
申请号：US17698136
申请日：2022-03-18
Applicant: SEIKO EPSON CORPORATION
Inventor： Mizuha HIROKI , Koya SHIRATORI , Shinichi YOTSUYA , Tetsuo SHIMIZU , Ryuta KOIZUMI , Shoichi UCHIYAMA , Tomoko AKAGAWA
IPC: G03B21/20
Abstract: An illuminator includes a light source that outputs first light, a wavelength converter that converts the first light into second light, an optical element that reflects the first light toward the wavelength converter and transmits the second light, and an illumination system which is disposed on the opposite side of the optical element from the wavelength converter. The wavelength converter includes a substrate, a reflection layer facing a first surface of the substrate, a wavelength conversion layer having a second surface and facing the reflection layer, and a structural element facing the second surface and having a plurality of protrusions that reflect part of the first light. The plurality of protrusions each have an inclining surface that inclines with respect to the second surface, and at least part of the first light and reflected off the inclining surface enters the illumination system without traveling via the optical element.
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公开(公告)号：US20190324360A1
公开(公告)日：2019-10-24
申请号：US16390053
申请日：2019-04-22
Applicant: SEIKO EPSON CORPORATION
Inventor： Tetsuo SHIMIZU , Akira EGAWA , Hidemitsu SORIMACHI
Abstract: A light source device according to the present disclosure includes a substrate having a first surface, a plurality of light emitting elements disposed on the first surface side of the substrate, a frame body which is disposed so as to surround the plurality of light emitting elements, and which is bonded on the first surface side of the substrate, and a lid body which has a light transmissive member configured to transmit light emitted from the plurality of light emitting elements, which is disposed so as to be opposed to the first surface of the substrate, and which is bonded on an opposite side of the frame body to the substrate. The plurality of light emitting elements is housed in a housing space, the housing space being formed by the substrate, the frame body and the lid body. The frame body is formed of a material including resin.
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公开(公告)号：US20190302587A1
公开(公告)日：2019-10-03
申请号：US16364267
申请日：2019-03-26
Applicant: SEIKO EPSON CORPORATION
Inventor： Tetsuo SHIMIZU , Akira EGAWA
Abstract: A wavelength conversion element according to an aspect of the invention includes a first wavelength conversion layer that has a first light incident surface on which excitation light is incident and a first light exiting surface facing away from the first light incident surface and emits first fluorescence, a second wavelength conversion layer that has a second light incident surface on which at least the first fluorescence is incident and emits second fluorescence, and a substrate that has a first surface and a second surface facing away from the first surface and includes a light transmitting portion that transmits at least the first fluorescence. The first wavelength conversion layer is so provided that the first light exiting surface faces the first surface of the substrate, and the second wavelength conversion layer is so provided that the second light incident surface faces the second surface of the substrate.
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