Patents by Inventor Yuichiro Matsumoto
Yuichiro Matsumoto 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: 20240111209Abstract: A light source apparatus according to an aspect of the present disclosure includes a first light source section that outputs first light containing a first polarized component and a second polarized component, a second light source section that outputs second light, a wavelength converter that converts the first light into third light, a light combiner that combines the first light, the second light, and the third light, and a filter that attenuates light of the third wavelength band. The light combiner reflects the first polarized component and transmits the second polarized component to cause one of he first polarized component and the second polarized component to exit toward the wavelength converter, and transmits the first light and the second light or the third light and reflects the third light or the first light and the second light. The filter is movable.Type: ApplicationFiled: September 29, 2023Publication date: April 4, 2024Applicant: SEIKO EPSON CORPORATIONInventors: Wataru YASUMATSU, Yuichiro MATSUMOTO, Naoya SHINDO
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Patent number: 11921444Abstract: A belt unit, for use in an image forming apparatus, includes an endless belt that moves in a movement direction, a transfer member, a collecting member, a storage container, and a conveyance member. The conveyance member conveys toner in a conveyance direction, rotates about a rotational axis extending in a rotational axis direction, includes a shaft and a conveyance portion provided on a shaft outer surface, and has a helical shape having a helical axis extending in the rotational axis direction. The conveyance member further includes a protruding portion protruding from the shaft outer surface in a direction crossing the conveyance member rotational axis, which has a shape different from the helical shape, and which is provided on a shaft portion downstream of the conveyance portion in the conveyance direction. The rotational axis direction is a direction crossing both the endless belt movement direction and a transfer member longitudinal direction.Type: GrantFiled: July 22, 2022Date of Patent: March 5, 2024Assignee: Canon Kabushiki KaishaInventors: Norihiro Matsumoto, Yuichiro Inaba, Akinori Mitsumata
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Patent number: 10855962Abstract: A projector includes a measurement unit and a correction parameter generation unit. The measurement unit measures a color of image light of the image formed on a projection surface in terms of a plurality of colors constituting an RGB color system and a Z value in an XYZ color system. The correction parameter generation unit generates a correction parameter based on a first measurement value and a second measurement value. The first measurement value measured by the measurement unit is obtained by converting a measurement value of the color in the RGB color system into the color in the XYZ color system. The second measurement value measured by the measurement unit is a value in the XYZ color system. The measurement unit includes an optical filter having transmittance characteristics corresponding to spectral characteristics of blue light, in a wavelength range of a color light in the RGB color system.Type: GrantFiled: August 29, 2019Date of Patent: December 1, 2020Assignee: Seiko Epson CorporationInventor: Yuichiro Matsumoto
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Publication number: 20200077058Abstract: A projector includes a measurement unit and a correction parameter generation unit. The measurement unit measures a color of image light of the image formed on a projection surface in terms of a plurality of colors constituting an RGB color system and a Z value in an XYZ color system. The correction parameter generation unit generates a correction parameter based on a first measurement value and a second measurement value. The first measurement value measured by the measurement unit is obtained by converting a measurement value of the color in the RGB color system into the color in the XYZ color system. The second measurement value measured by the measurement unit is a value in the XYZ color system. The measurement unit includes an optical filter having transmittance characteristics corresponding to spectral characteristics of blue light, in a wavelength range of a color light in the RGB color system.Type: ApplicationFiled: August 29, 2019Publication date: March 5, 2020Applicant: SEIKO EPSON CORPORATIONInventor: Yuichiro MATSUMOTO
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Patent number: 8668531Abstract: A terminal 1 which maintains electrical connectivity between a mating terminal and contact spring pieces, reduce size and firmly fixes the contact spring pieces at a terminal main body, includes the conductive, rectangular tube-shaped terminal main body 3 into which the mating terminal 2 is inserted, the plurality of one conductive contact spring pieces 18 extending from one wall 5 to the other wall 6 of the terminal main body and tilted relative to a mating terminal insertion direction, and a plurality of the other conductive contact spring pieces 19 extending from the other wall to the one wall and tilted relative to the insertion direction. The one and the other contact spring pieces 78, 79 are arranged alternatively along the insertion direction.Type: GrantFiled: June 15, 2010Date of Patent: March 11, 2014Assignee: Yazaki CorporationInventors: Yasuhiro Yamaguchi, Hajime Kato, Yuichiro Matsumoto, Masayuki Kataoka, Tsuyoshi Mizushima
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Patent number: 8585421Abstract: A connector 1 includes: a terminal 2; an inner housing 5; and an outer housing 30 receiving the terminal 2 and the inner housing 5. The terminal 2 is provided with a first electric connecting part 21 received and held in the inner housing 5 and electrically connected to the mating connector, a second electric connecting part 22, and a flexible coupling part 23 made of conductive material, movably coupling and electrically connecting the first electric connecting part 21 and the second electric connecting part 22. The outer housing 30 is provided with a receiving part 36 movably receiving the inner housing 5 which receives the first electric connecting part 21, and a fixing part 35 to which the second electric connecting part 22 is fixed.Type: GrantFiled: March 5, 2010Date of Patent: November 19, 2013Assignee: Yazaki CorporationInventors: Yasuhiro Yamaguchi, Nobuaki Yoshioka, Sakai Yagi, Sachiko Yagome, Hiroshi Kawano, Yuichiro Matsumoto
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Patent number: 8242425Abstract: A projector includes: first and second lamps; a combining member configured to combine the light from the first and second lamps; a light modulation device arranged on the downstream side of an optical path of the combining member configured to provide higher modulation contrast with respect to the light emitted from the first lamp and entering in a state of being inclined in a first direction with respect to a system optical axis than modulation contrast with respect to the light emitted from the second lamp and entering in a state of being inclined in a second direction; and an illumination control device configured to turn ON the first lamp having the higher contrast with respect to the light modulation device on a priority basis for illumination of the light modulation device in a one-lamp mode in which only one of the first and second lamps is turned ON.Type: GrantFiled: February 4, 2010Date of Patent: August 14, 2012Assignee: Seiko Epson CorporationInventors: Yuichiro Matsumoto, Osamu Fujimaki, Takeshi Takezawa
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Publication number: 20120108113Abstract: A terminal 1 which maintains electrical connectivity between a mating terminal and contact spring pieces, reduce size and firmly fixes the contact spring pieces at a terminal main body, includes the conductive, rectangular tube-shaped terminal main body 3 into which the mating terminal 2 is inserted, the plurality of one conductive contact spring pieces 18 extending from one wall 5 to the other wall 6 of the terminal main body and tilted relative to a mating terminal insertion direction, and a plurality of the other conductive contact spring pieces 19 extending from the other wall to the one wall and tilted relative to the insertion direction. The one and the other contact spring pieces 78, 79 are arranged alternatively along the insertion direction.Type: ApplicationFiled: June 15, 2010Publication date: May 3, 2012Applicant: Yazaki CorporationInventors: Yasuhiro Yamaguchi, Hajime Kato, Yuichiro Matsumoto, Masayuki Kataoka, Tsuyoshi Mizushima
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Publication number: 20120015546Abstract: To provide a connector able to be surely fitted with a mating connector by absorbing a position gap generated between a terminal and a terminal of the mating connector. A connector 1 includes: a terminal 2; an inner housing 5; and an outer housing 30 receiving the terminal 2 and the inner housing 5. The terminal 2 is provided with a first electric connecting part 21 received and held in the inner housing 5 and electrically connected to the mating connector, a second electric connecting part 22, and a flexible coupling part 23 made of conductive material, movably coupling and electrically connecting the first electric connecting part 21 and the second electric connecting part 22. The outer housing 30 is provided with a receiving part 36 movably receiving the inner housing 5 which receives the first electric connecting part 21, and a fixing part 35 to which the second electric connecting part 22 is fixed.Type: ApplicationFiled: March 5, 2010Publication date: January 19, 2012Applicant: Yazaki CorporationInventors: Yasuhiro Yamaguchi, Nobuaki Yoshioka, Sakai Yagi, Sachiko Yagome, Hiroshi Kawano, Yuichiro Matsumoto
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Publication number: 20100208212Abstract: A projector includes: first and second lamps; a combining member configured to combine the light from the first and second lamps; a light modulation device arranged on the downstream side of an optical path of the combining member configured to provide higher modulation contrast with respect to the light emitted from the first lamp and entering in a state of being inclined in a first direction with respect to a system optical axis than modulation contrast with respect to the light emitted from the second lamp and entering in a state of being inclined in a second direction; and an illumination control device configured to turn ON the first lamp having the higher contrast with respect to the light modulation device on a priority basis for illumination of the light modulation device in a one-lamp mode in which only one of the first and second lamps is turned ON.Type: ApplicationFiled: February 4, 2010Publication date: August 19, 2010Applicant: SEIKO EPSON CORPORATIONInventors: Yuichiro MATSUMOTO, Osamu FUJIMAKI, Takeshi TAKEZAWA