Patents by Inventor Shigekazu Aoki
Shigekazu Aoki 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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Publication number: 20240126156Abstract: A light source device according to the present disclosure is provided with a light emitting element, a light guide member, a support member for supporting the light guide member in a groove part, and a holding member for holding the light guide member outside the groove part. The first face of the light guide member emits light guided by the light guide member, the light emitting element is disposed so as to be opposed to the third face, and the groove part has a support surface, a first wall surface, and a second wall surface. The light guide member has a protruding part which protrudes outside the groove part in at least one of both end portions on the first axis, and the protruding part is held by the holding member.Type: ApplicationFiled: October 12, 2023Publication date: April 18, 2024Inventors: Yuichiro IWAMA, Shigekazu AOKI
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Patent number: 11906888Abstract: A light source apparatus includes a first light source that emits first light belonging to a first wavelength band, a second light source that emits second light belonging to a second wavelength band, a wavelength converter that contains a phosphor and converts the first light into third light belonging to a third wavelength band different from the first, a first heat dissipation member that includes a plurality of first fins and dissipates heat generated by the first light source, a second heat dissipation member that includes a plurality of second fins and dissipates heat generated by the second light source, and a first direction wherein first channels, specified by the gaps between the first fins and along which a refrigerant is supplied, extend coincides with a second direction wherein second channels, specified by the gaps between the second fins and along which the refrigerant is supplied, extend.Type: GrantFiled: March 25, 2021Date of Patent: February 20, 2024Assignee: SEIKO EPSON CORPORATIONInventors: Shigekazu Aoki, Shingo Komiyama, Junichi Suzuki
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Publication number: 20230236490Abstract: A light source apparatus according to an aspect of the present disclosure includes a light emitter that outputs light, a light guiding member that guides the light outputted from the light emitter, and a support member that supports the light guiding member. The light guiding member has a first surface and a second surface that intersect with the longitudinal direction of the light guiding member and are located on sides opposite from each other, and a third surface that intersects with the first and second surfaces, and causes light to exit via the first surface. The support member has a support surface that faces the third surface of the light guiding member. The support surface has a contact section that is in contact with the third surface and a noncontact section that is not in contact with the third surface. The third surface is a planar surface, and the contact section is a planar surface.Type: ApplicationFiled: January 25, 2023Publication date: July 27, 2023Inventor: Shigekazu AOKI
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Publication number: 20210302822Abstract: A light source apparatus includes a first light source that emits first light belonging to a first wavelength band, a second light source that emits second light belonging to a second wavelength band, a wavelength converter that contains a phosphor and converts the first light into third light belonging to a third wavelength band different from the first, a first heat dissipation member that includes a plurality of first fins and dissipates heat generated by the first light source, a second heat dissipation member that includes a plurality of second fins and dissipates heat generated by the second light source, and a first direction wherein first channels, specified by the gaps between the first fins and along which a refrigerant is supplied, extend coincides with a second direction wherein second channels, specified by the gaps between the second fins and along which the refrigerant is supplied, extend.Type: ApplicationFiled: March 25, 2021Publication date: September 30, 2021Applicant: SEIKO EPSON CORPORATIONInventors: Shigekazu AOKI, Shingo KOMIYAMA, Junichi SUZUKI
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Patent number: 10877361Abstract: A cooling device includes an evaporator configured to evaporate working fluid in a liquid phase due to a heat transferred from a cooling target, a condenser configured to condense the working fluid in the vapor phase, a vapor pipe through which the working fluid changed to the vapor phase in the evaporator flow into the condenser, and a liquid pipe through which the working fluid changed to the liquid phase in the condenser flow into the evaporator. The condenser has a phase change flow channel into which the working fluid in the vapor phase inflows via the vapor pipe, and through which the working fluid changed in phase from the vapor phase to the liquid phase flow out to the liquid pipe. The phase change flow channel has a reduced diameter part having a flow channel cross-sectional area decreasing in a direction from upstream toward downstream of the working fluid.Type: GrantFiled: August 20, 2019Date of Patent: December 29, 2020Assignee: SEIKO EPSON CORPORATIONInventors: Shigekazu Aoki, Norio Imaoka
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Publication number: 20200064718Abstract: A cooling device includes an evaporator configured to evaporate working fluid in a liquid phase due to a heat transferred from a cooling target, a condenser configured to condense the working fluid in the vapor phase, a vapor pipe through which the working fluid changed to the vapor phase in the evaporator flow into the condenser, and a liquid pipe through which the working fluid changed to the liquid phase in the condenser flow into the evaporator. The condenser has a phase change flow channel into which the working fluid in the vapor phase inflows via the vapor pipe, and through which the working fluid changed in phase from the vapor phase to the liquid phase flow out to the liquid pipe. The phase change flow channel has a reduced diameter part having a flow channel cross-sectional area decreasing in a direction from upstream toward downstream of the working fluid.Type: ApplicationFiled: August 20, 2019Publication date: February 27, 2020Applicant: SEIKO EPSON CORPORATIONInventors: Shigekazu AOKI, Norio IMAOKA
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Patent number: 10451958Abstract: A wavelength conversion device includes a rotating device and a base member which is rotated by the rotating device. The base member includes a wavelength conversion portion which is disposed in an annular shape on a first surface of the base member, a first region which is located further inside than the wavelength conversion portion, and a second region which is located further outside than the wavelength conversion portion, and is larger in surface area than the first region.Type: GrantFiled: November 8, 2016Date of Patent: October 22, 2019Assignee: Seiko Epson CorporationInventors: Shigekazu Aoki, Akira Egawa, Shunji Kamijima
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Patent number: 9933693Abstract: An optical device includes a reflector and a rotation member that dissipates the heat of the reflector. The rotation member includes a base portion placed on the reflector and a plurality of blade portions that project to the side opposite to the base portion. The plurality of blade portions each include an inclined portion that is inclined with respect to the base portion.Type: GrantFiled: December 19, 2016Date of Patent: April 3, 2018Assignee: Seiko Epson CorporationInventor: Shigekazu Aoki
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Publication number: 20170205692Abstract: An optical device includes a reflector and a rotation member that dissipates the heat of the reflector. The rotation member includes a base portion placed on the reflector and a plurality of blade portions that project to the side opposite to the base portion. The plurality of blade portions each include an inclined portion that is inclined with respect to the base portion.Type: ApplicationFiled: December 19, 2016Publication date: July 20, 2017Inventor: Shigekazu Aoki
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Publication number: 20170176844Abstract: A wavelength conversion device includes a rotating device and a base member which is rotated by the rotating device. The base member includes a wavelength conversion portion which is disposed in an annular shape on a first surface of the base member, a first region which is located further inside than the wavelength conversion portion, and a second region which is located further outside than the wavelength conversion portion, and is larger in surface area than the first region.Type: ApplicationFiled: November 8, 2016Publication date: June 22, 2017Inventors: Shigekazu Aoki, Akira Egawa, Shunji Kamijima
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Patent number: 7256591Abstract: A probe card is used to test an electronic device. The probe card includes a base plate and a cantilever-type probe arranged on the base plate. The cantilever-type probe has an end that contacts the contacted body and moves when contacting the contacted body. A stopper arranged on the base plate restricts the movement of the cantilever-type probe.Type: GrantFiled: October 31, 2002Date of Patent: August 14, 2007Assignee: Fujitsu LimitedInventors: Tsutomu Tatematsu, Kenji Togashi, Tetsuhiro Nanbu, Shigenobu Ishihara, Morihiko Hamada, Yoshikazu Arisaka, Kunihiro Itagaki, Shigekazu Aoki
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Patent number: 7171592Abstract: A semiconductor memory device includes a self-testing circuit and a self-redundancy circuit with simple structures. The self-testing circuit includes a comparison circuit which compares write data with read data with respect to normal memory blocks and redundant memory blocks, and a decision circuit which decides if the semiconductor memory device is good or defective based on the plurality of comparison result signals. A signal transfer and holding circuit is connected between the comparison circuit and the decision circuit to transfer the plurality of comparison result signals to the decision circuit and to supply the plurality of comparison result signals to the self-redundancy circuit as a test result.Type: GrantFiled: February 10, 2003Date of Patent: January 30, 2007Assignee: Fujitsu LimitedInventors: Kenji Togashi, Morihiko Hamada, Shigekazu Aoki, Katsumi Shigenobu, Yukio Saka, Yoshikazu Arisaka, Toyoji Sawada, Tadashi Asai
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Publication number: 20050158005Abstract: An optical fiber holding member in which occurrence of defectives is prevented by increasing the degree of accuracy in pitches of the optical fibers with a simplified manufacturing method, and a method of manufacturing the same are provided. A deflection generating block is disposed in a cavity for molding a holder, and a positioning block is disposed in contact with the cavity. The deflection generating block is formed with V-shaped holding grooves for the optical fibers. The positioning block has grooves for placing the optical fibers. The holding grooves and the grooves are shifted laterally of the extending direction of the optical fibers. The optical fibers and the positioning surfaces of the grooves are in press-contact by a resilient restoring force of the optical fibers, and are positioned in the lateral or vertical direction. In this state, resin is injected into the cavity, whereby obtaining the optical fiber holding member.Type: ApplicationFiled: January 14, 2005Publication date: July 21, 2005Applicant: OMRON CorporationInventors: Hiroyuki Otsuka, Shigekazu Aoki, Masayoshi Tani
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Patent number: 6750744Abstract: An electromagnetic relay is provided with an iron core (50) which has a virtually J-letter shape on a plan view with one end serving as a support-receiving portion (51) and the other end serving as a magnetic pole portion (52), and a movable iron member (60) which is supported by a movable contact member (70) attached to a corner thereof, and has a virtually L-letter shape on a plan view with one end (61) being supported on the support-receiving portion (51) of the iron core (50) so as to freely pivot thereon and an adsorb portion (62) that is the other end being allowed to face the magnetic pole portion (52) of the iron core (50) so as to be adsorbed thereon. The objective of the present invention is to provide an inexpensive electromagnetic relay which is less susceptible to deviations in the adsorb portion of the movable iron member that comes into contact with and separates from the magnetic pole portion of the iron core, and has stable operation characteristics.Type: GrantFiled: August 27, 2002Date of Patent: June 15, 2004Assignee: Omron CorporationInventors: Syuichi Misumi, Yuichi Kariya, Hiroyuki Miyano, Shigekazu Aoki, Kenji Nakamura, Tatsuro Ishikawa, Takehiko Nakagawa
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Publication number: 20030177415Abstract: A semiconductor memory device includes a self-testing circuit and a self-redundancy circuit with simple structures. The self-testing circuit includes a comparison circuit which compares write data with read data with respect to normal memory blocks and redundant memory blocks, and a decision circuit which decides if the semiconductor memory device is good or defective based on the plurality of comparison result signals. A signal transfer and holding circuit is connected between the comparison circuit and the decision circuit to transfer the plurality of comparison result signals to the decision circuit and to supply the plurality of comparison result signals to the self-redundancy circuit as a test result.Type: ApplicationFiled: February 10, 2003Publication date: September 18, 2003Applicant: Fujitsu LimitedInventors: Kenji Togashi, Morihiko Hamada, Shigekazu Aoki, Katsumi Shigenobu, Yukio Saka, Yoshikazu Arisaka, Toyoji Sawada, Tadashi Asai
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Publication number: 20030098701Abstract: An inexpensive probing card that has probe pins for contacting pads with high reliability. The probe pins are arranged on a base plate. The probe pins move along the pads when contacting the pads. A stopper restricts the movement of the probe pins.Type: ApplicationFiled: October 31, 2002Publication date: May 29, 2003Applicant: Fujitsu LimitedInventors: Tsutomu Tatematsu, Kenji Togashi, Tetsuhiro Nanbu, Shigenobu Ishihara, Morihiko Hamada, Yoshikazu Arisaka, Kunihiro Itagaki, Shigekazu Aoki
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Publication number: 20030052759Abstract: An electromagnetic relay is provided with an iron core (50) which has a virtually J-letter shape on a plan view with one end serving as a support-receiving portion (51) and the other end serving as a magnetic pole portion (52), and a movable iron member (60) which is supported by a movable contact member (70) attached to a corner thereof, and has a virtually L-letter shape on a plan view with one end (61) being supported on the support-receiving portion (51) of the iron core (50) so as to freely pivot thereon and an adsorb portion (62) that is the other end being allowed to face the magnetic pole portion (52) of the iron core (50) so as to be adsorbed thereon. The objective of the present invention is to provide an inexpensive electromagnetic relay which is less susceptible to deviations in the adsorb portion of the movable iron member that comes into contact with and separates from the magnetic pole portion of the iron core, and has stable operation characteristics.Type: ApplicationFiled: August 27, 2002Publication date: March 20, 2003Applicant: OMRON CorporationInventors: Syuichi Misumi, Yuichi Kariya, Hiroyuki Miyano, Shigekazu Aoki, Kenji Nakamura, Tatsuro Ishikawa, Takehiro Nakagawa
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Publication number: 20020003730Abstract: The semiconductor memory device has a word configuration determination signal generating circuit including a plurality of generating circuits, each of which is formed of two clocked inverters and two inverters. In a normal operation mode, a test mode signal TX4 is inactivated and a word configuration determination signal [×16E] of an H level is output. In a test mode, the test mode signal TX4 is activated and a word configuration determination signal [×4E] of an H level is output. Thus, in the test mode, the word configuration is switched to the one that is smaller than in the normal operation mode. This allows simultaneous testing of a larger number of semiconductor memory devices.Type: ApplicationFiled: December 4, 2000Publication date: January 10, 2002Inventors: Shigekazu Aoki, Seiji Sawada, Mikio Asakura, Takeshi Hamamoto, Masakazu Hirose
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Patent number: 6335887Abstract: The semiconductor memory device has a word configuration determination signal generating circuit including a plurality of generating circuits, each of which is formed of two clocked inverters and two inverters. In a normal operation mode, a test mode signal TX4 is inactivated and a word configuration determination signal [x16E] of an H level is output. In a test mode, the test mode signal TX4 is activated and a word configuration determination signal [x4E] of an H level is output. Thus, in the test mode, the word configuration is switched to the one that is smaller than in the normal operation mode. This allows simultaneous testing of a larger number of semiconductor memory devices.Type: GrantFiled: December 4, 2000Date of Patent: January 1, 2002Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Shigekazu Aoki, Seiji Sawada, Mikio Asakura, Takeshi Hamamoto, Masakazu Hirose
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Patent number: 5943280Abstract: When a special operation mode is instructed, a test oscillation circuit operating at a cycle shorter than a refresh oscillation circuit specifying the cycle of self refresh is activated according to an external row address strobe signal. The internal row address strobe signal is provided to row related control circuitry via a selector. An internal row address strobe signal can be rendered active at a cycle shorter than the cycle of the external row address strobe signal, to carry out row selection. A row is selected at a cycle shorter than the transition cycle of an external signal.Type: GrantFiled: January 22, 1998Date of Patent: August 24, 1999Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Yukihiro Tsukamoto, Koji Kimura, Masaki Nishimoto, Masayuki Kasamoto, Naotaka Okada, Kazuhisa Uetsuki, Masakatsu Murakami, Shigekazu Aoki, Zengcheng Tian, Shin Sekiya, Akihiro Shirai