Patents by Inventor Takafumi Sugiyama
Takafumi Sugiyama has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8872203Abstract: In a semiconductor light-emitting device, light from a laser diode is output to the outside after the luminance of the light being enhanced. It includes a support body provided with lead terminals, one or more laser diodes mounted on the support body, a cylindrical reflector fixed to the support body to surround the laser diode(s) and provided with a light reflection surface formed on an inner surface thereof, and a cap placed to cover an opening distal end face of the reflector and held at an opening distal end part of the reflector, the cap being provided at a central part thereof with a solid fluorescent member including a fluorescent substance that is excited by the light from the laser diode and emits light different in colors from light emitted by the laser diode.Type: GrantFiled: September 10, 2008Date of Patent: October 28, 2014Assignee: Nichia CorporationInventors: Shinichi Nagahama, Atsutomo Hama, Takafumi Sugiyama, Yukihiro Hayashi, Naoto Morizumi, Yoshinori Murazaki
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Publication number: 20130322055Abstract: A light source device includes a first light source, a wavelength converter including a fluorescent material, a light-controller. The light-controller is disposed in a path of light propagating from the first light source toward the wavelength converter. The light-controller switches between transmission and reflection of light from the first light source.Type: ApplicationFiled: May 28, 2013Publication date: December 5, 2013Applicant: NICHIA CORPORATIONInventor: Takafumi SUGIYAMA
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Publication number: 20130257264Abstract: A wave-length conversion inorganic member can includes a base body and an inorganic particle layer on the base body. The inorganic particle layer can include particles of an inorganic wave-length conversion substance which is configured to absorb light of a first wave-length and to emit light of a second wave-length different from the first wave-length. The inorganic particle layer can include an agglomerate of a plurality of the particles. Each of the plurality of the particles are in contact with at least one of the other particles or the base body. A cover layer comprises an inorganic material, and the cover layer continuously covers a surface of the base body and surfaces of the particles. The inorganic particle layer has an interstice enclosed by the particles, or by the particles and one of the base body and the cover layer.Type: ApplicationFiled: March 28, 2013Publication date: October 3, 2013Applicant: NICHIA CORPORATIONInventors: Hiroto TAMAKI, Takayoshi WAKAKI, Tadao HAYASHI, Yoshiki SATO, Daisuke OYAMATSU, Takafumi SUGIYAMA, Takao KOSUGI
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Publication number: 20130163225Abstract: Provided is a wavelength converting device having excellent optical output. The wavelength converting device includes a substrate and a wavelength converting member disposed on the substrate. The wavelength converting member includes a fluorescent material powder and a binder binding the fluorescent material powder. An upper surface of the wavelength converting member serves as a light emitting surface which includes upper surfaces of the fluorescent material powder and an upper surface of the binder. The binder has first recesses formed adjacent to the fluorescent material powder in the upper surface of the binder.Type: ApplicationFiled: December 26, 2012Publication date: June 27, 2013Applicant: Nichia CorporationInventors: Yoshitaka NAKATSU, Takafumi Sugiyama
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Patent number: 8106414Abstract: A semiconductor light emitting device is provided which allows emission light from a light source to efficiently outgo from the semiconductor light emitting device so that the light emission intensity of the semiconductor light emitting device is increased. A penetrating opening is formed in the substantially central part of a cap member to communicate the interior side to the exterior side the cap member. The penetrating opening has an inclined portion. The inclined portion is opposed to and spaced away from a semiconductor light emitting element and includes a light entering portion through which emission light from the semiconductor light emitting element passes. The opening width of the inclined portion is getting wider from the light entering portion in the light traveling direction so that the inclined portion is tapered. The emission light from the semiconductor light emitting element can effectively outgo from the semiconductor light emitting device.Type: GrantFiled: November 20, 2007Date of Patent: January 31, 2012Assignee: Nichia CorporationInventor: Takafumi Sugiyama
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Patent number: 8080436Abstract: A method of manufacturing a light emitting device includes: a first step of forming on a supporting substrate made of a stainless steel, a plurality of conductive members each including a first region containing Au and a second region containing a metallic member having a diffusion coefficient with respect to a metal in the stainless steel smaller than a diffusion coefficient of Au with respect to the metal in the stainless steel, a second step of forming a base member made of a light-blocking resin on the supporting substrate between the conductive members, a third step of bonding a light emitting element on an upper surface of a conductive member through an adhesive member, a fourth step of covering the light emitting element with an optically transmissive sealing member, and a fifth step of removing the supporting substrate and individually separating the light emitting devices.Type: GrantFiled: July 28, 2010Date of Patent: December 20, 2011Assignee: Nichia CorporationInventor: Takafumi Sugiyama
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Publication number: 20110024786Abstract: A method of manufacturing a light emitting device includes: a first step of forming on a supporting substrate made of a stainless steel, a plurality of conductive members each including a first region containing Au and a second region containing a metallic member having a diffusion coefficient with respect to a metal in the stainless steel smaller than a diffusion coefficient of Au with respect to the metal in the stainless steel, a second step of forming a base member made of a light-blocking resin on the supporting substrate between the conductive members, a third step of bonding a light emitting element on an upper surface of a conductive member through an adhesive member, a fourth step of covering the light emitting element with an optically transmissive sealing member, and a fifth step of removing the supporting substrate and individually separating the light emitting devices.Type: ApplicationFiled: July 28, 2010Publication date: February 3, 2011Inventor: Takafumi Sugiyama
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Patent number: 7878696Abstract: An optical component that can be attached to an end portion of an optical guiding member, and a light converting member used in the optical component. The optical component comprises a cap having an engaging portion defining a bore engaged with an end member of a light guiding member, and an arranging portion defining a opening connected to the bore in the engaging portion, and a light converting member disposed in the opening formed in the arranging portion.Type: GrantFiled: December 12, 2006Date of Patent: February 1, 2011Assignee: Nichia CorporationInventors: Atsutomo Hama, Yoshinori Murazaki, Takafumi Sugiyama, Yukihiro Hayashi, Naoto Morizumi
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Patent number: 7751661Abstract: There is provided a light emitting device using an optical component capable of emitting light having a wavelength different from that of light exit from an optical fiber and obtaining light of high output, and capable of being easily attached to an end of the optical fiber. The optical component includes an optical fiber holding member for holding an optical fiber, a light conversion member, and a cap having an inner hole allowing the light conversion member and the optical fiber holding member to be inserted into and an engagement part with an opening for engaging inserted members at one end of the inner hole. The light conversion member inserted into the inner hole of the cap is fitted into the inner hole with the optical fiber holding member pressed against the engagement part. The opening of the engagement part is smaller than a maximum diameter of the light conversion member.Type: GrantFiled: September 20, 2007Date of Patent: July 6, 2010Assignees: Nippon Electric Glass Co, Ltd, Nichia CorporationInventors: Masaaki Kadomi, Yoshio Umayahara, Tadahito Furuyama, Masaru Iwao, Atsutomo Hama, Takafumi Sugiyama, Yukihiro Hayashi, Naoto Morizumi
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Patent number: 7591575Abstract: The present invention provides a light emitting device comprising: an excitation light source which radiates excitation light; a wavelength converting member which absorbs and converts the wavelength of at least part of the excitation light radiated from the excitation light source, and releases light with a predetermined wavelength band; a light guide for guiding the excitation light radiated from the excitation light source to the wavelength converting member, with one end at the excitation light source and the other end at the wavelength converting member, wherein the refractive index of the cross-sectional center region (core) is higher than that of the circumferential region (clad); and a thermally conductive transparent film which contacts with the wavelength converting member.Type: GrantFiled: January 18, 2008Date of Patent: September 22, 2009Assignee: Nichia CorporationInventors: Atsutomo Hama, Junji Takeichi, Takafumi Sugiyama, Yukihiro Hayashi
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Publication number: 20090003400Abstract: In a semiconductor light-emitting device, light from a laser diode is output to the outside after the luminance of the light being enhanced. It includes a support body provided with lead terminals, one or more laser diodes mounted on the support body, a cylindrical reflector fixed to the support body to surround the laser diode(s) and provided with a light reflection surface formed on an inner surface thereof, and a cap placed to cover an opening distal end face of the reflector and held at an opening distal end part of the reflector, the cap being provided at a central part thereof with a solid fluorescent member including a fluorescent substance that is excited by the light from the laser diode and emits light different in colors from light emitted by the laser diode.Type: ApplicationFiled: September 10, 2008Publication date: January 1, 2009Applicant: NICHIA CORPORATIONInventors: Shinichi Nagahama, Atsutomo Hama, Takafumi Sugiyama, Yukihiro Hayashi, Naoto Morizumi, Yoshinori Murazaki
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Patent number: 7440482Abstract: A nitride semiconductor laser element, comprises a substrate, a nitride semiconductor layer laminated over said substrate and having a ridge on its surface, and an electrode, wherein a first protective film is formed so that an air gap is located on at least part of the region extending from the side of the ridge to the surface of the nitride semiconductor layer on both sides of said ridge.Type: GrantFiled: October 24, 2006Date of Patent: October 21, 2008Assignee: Nichia CorporationInventors: Takafumi Sugiyama, Eiji Sakaguchi, Masaki Yoshida
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Publication number: 20080117620Abstract: The present invention provides a light emitting device comprising: an excitation light source which radiates excitation light; a wavelength converting member which absorbs and converts the wavelength of at least part of the excitation light radiated from the excitation light source, and releases light with a predetermined wavelength band; a light guide for guiding the excitation light radiated from the excitation light source to the wavelength converting member, with one end at the excitation light source and the other end at the wavelength converting member, wherein the refractive index of the cross-sectional center region (core) is higher than that of the circumferential region (clad); and a thermally conductive transparent film which contacts with the wavelength converting member.Type: ApplicationFiled: January 18, 2008Publication date: May 22, 2008Applicant: NICHIA CORPORATIONInventors: Atsutomo HAMA, Junji TAKEICHI, Takafumi SUGIYAMA, Yukihiro HAYASHI
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Publication number: 20080116473Abstract: A semiconductor light emitting device is provided which allows emission light from a light source to efficiently outgo from the semiconductor light emitting device so that the light emission intensity of the semiconductor light emitting device is increased. A penetrating opening is formed in the substantially central part of a cap member to communicate the interior side to the exterior side the cap member. The penetrating opening has an inclined portion. The inclined portion is opposed to and spaced away from a semiconductor light emitting element and includes a light entering portion through which emission light from the semiconductor light emitting element passes. The opening width of the inclined portion is getting wider from the light entering portion in the light traveling direction so that the inclined portion is tapered. The emission light from the semiconductor light emitting element can effectively outgo from the semiconductor light emitting device.Type: ApplicationFiled: November 20, 2007Publication date: May 22, 2008Applicant: Nichia CorporationInventor: Takafumi SUGIYAMA
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Patent number: 7356054Abstract: The present invention provides a light emitting device comprising: an excitation light source which radiates excitation light; a wavelength converting member which absorbs and converts the wavelength of at least part of the excitation light radiated from the excitation light source, and releases light with a predetermined wavelength band; a light guide for guiding the excitation light radiated from the excitation light source to the wavelength converting member, with one end at the excitation light source and the other end at the wavelength converting member, wherein the refractive index of the cross-sectional center region (core) is higher than that of the circumferential region (clad); and a thermally conductive transparent film which contacts with the wavelength converting member.Type: GrantFiled: December 16, 2005Date of Patent: April 8, 2008Assignee: Nichia CorporationInventors: Atsutomo Hama, Junji Takeichi, Takafumi Sugiyama, Yukihiro Hayashi
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Publication number: 20080075406Abstract: There is provided a light emitting device using an optical component capable of emitting light having a wavelength different from that of light exit from an optical fiber and obtaining light of high output, and capable of being easily attached to an end of the optical fiber. The optical component includes an optical fiber holding member for holding an optical fiber, a light conversion member, and a cap having an inner hole allowing the light conversion member and the optical fiber holding member to be inserted into and an engagement part with an opening for engaging inserted members at one end of the inner hole. The light conversion member inserted into the inner hole of the cap is fitted into the inner hole with the optical fiber holding member pressed against the engagement part. The opening of the engagement part is smaller than a maximum diameter of the light conversion member.Type: ApplicationFiled: September 20, 2007Publication date: March 27, 2008Inventors: Masaaki Kadomi, Yoshio Umayahara, Tadahito Furuyama, Masaru Iwao, Atsutomo Hama, Takafumi Sugiyama, Yukihiro Hayashi, Naoto Morizumi
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Publication number: 20070195538Abstract: An optical component that can be attached to an end portion of an optical guiding member, and a light converting member used in the optical component. The optical component comprises a cap having an engaging portion defining a bore engaged with an end member of a light guiding member, and an arranging portion defining a opening connected to the bore in the engaging portion, and a light converting member disposed in the opening formed in the arranging portion.Type: ApplicationFiled: December 12, 2006Publication date: August 23, 2007Applicant: NICHIA CORPORATIONInventors: Atsutomo Hama, Yoshinori Murazaki, Takafumi Sugiyama, Yukihiro Hayashi, Naoto Morizumi
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Publication number: 20070189352Abstract: A light emitting device, comprises: a light source that emits excitation light; a light guide that propagates the excitation light, and in which the refractive index of the center part (core) of a cross section is higher than the refractive index of the peripheral part (cladding); a wavelength conversion member that absorbs the excitation light propagated by the light guide and converts the wavelength thereof, and releases light of a predetermined wavelength band; and a shielding member that blocks the wavelength of at least part of the excitation light and the light emitted from the wavelength conversion member.Type: ApplicationFiled: February 6, 2007Publication date: August 16, 2007Applicant: NICHIA CORPORATIONInventors: Shinichi Nagahama, Atsutomo Hama, Takafumi Sugiyama, Tomohisa Kishimoto
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Patent number: D591438Type: GrantFiled: April 18, 2007Date of Patent: April 28, 2009Assignee: Nichia CorporationInventors: Atsutomo Hama, Takafumi Sugiyama, Yukihiro Hayashi, Naoto Morizumi
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Patent number: D595881Type: GrantFiled: April 18, 2007Date of Patent: July 7, 2009Assignees: Nichia Corporation, Nippon Electric Glass Co., Ltd.Inventors: Atsutomo Hama, Takafumi Sugiyama, Yukihiro Hayashi, Naoto Morizumi, Masaaki Kadomi, Tadahito Furuyama