Patents by Inventor Osamu Fujimaki
Osamu Fujimaki 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: 9454069Abstract: In at least one embodiment of the disclosure, an illumination system includes a light source that emits an illumination light flux. A first lens array has a plurality of first small lenses arranged therein. The first small lenses divide the illumination light flux emitted from the light source into a plurality of segmental light fluxes. A second lens array has a plurality of second small lenses arranged therein. The second small lenses have a one-to-one correspondence with the first small lenses and are configured to receive the segmental light fluxes exiting from the first small lenses. At least some of the second small lenses each include a plurality of lens elements disposed in a surface direction that is the same as the second small lenses. A superimposing lens superimposes on an illuminated area the segmental light fluxes exiting from the plurality of second small lenses.Type: GrantFiled: December 15, 2014Date of Patent: September 27, 2016Assignee: Seiko Epson CorporationInventors: Katsumi Tanaka, Osamu Fujimaki
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Patent number: 9104094Abstract: In at least one embodiment of the disclosure, an illumination system includes a light source that emits an illumination light flux. A first lens array has a plurality of first small lenses arranged therein. The first small lenses divide the illumination light flux emitted from the light source into a plurality of segmental light fluxes. A second lens array has a plurality of second small lenses arranged therein. The second small lenses have a one-to-one correspondence with the first small lenses and are configured to receive the segmental light fluxes exiting from the first small lenses. At least some of the second small lenses each include a plurality of lens elements disposed in a surface direction that is the same as the second small lenses. A superimposing lens superimposes on an illuminated area the segmental light fluxes exiting from the plurality of second small lenses.Type: GrantFiled: June 25, 2009Date of Patent: August 11, 2015Assignee: Seiko Epson CoporationInventors: Katsumi Tanaka, Osamu Fujimaki
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Publication number: 20150098063Abstract: In at least one embodiment of the disclosure, an illumination system includes a light source that emits an illumination light flux. A first lens array has a plurality of first small lenses arranged therein. The first small lenses divide the illumination light flux emitted from the light source into a plurality of segmental light fluxes. A second lens array has a plurality of second small lenses arranged therein. The second small lenses have a one-to-one correspondence with the first small lenses and are configured to receive the segmental light fluxes exiting from the first small lenses. At least some of the second small lenses each include a plurality of lens elements disposed in a surface direction that is the same as the second small lenses. A superimposing lens superimposes on an illuminated area the segmental light fluxes exiting from the plurality of second small lenses.Type: ApplicationFiled: December 15, 2014Publication date: April 9, 2015Inventors: Katsumi Tanaka, Osamu Fujimaki
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Patent number: 8474987Abstract: A projector includes: an illuminator that emits an illumination light flux; a light control mechanism that blocks at least part of the illumination light from the illuminator; a light modulator illuminated with the illumination light from the illuminator; a projection system capable of projecting modulated light formed by the light modulator and switching the f number when the modulated light is projected; and a control unit that controls the open/close state of the light control mechanism in accordance with the f number of the projection system so that illumination light having an angular distribution corresponding to the f number of the projection system is incident on the projection system.Type: GrantFiled: June 9, 2010Date of Patent: July 2, 2013Assignee: Seiko Epson CorporationInventors: Kazuhiro Nishida, Osamu Fujimaki, Katsumi Tanaka
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Patent number: 8308305Abstract: A projector includes: a light source device, a color-separating optical system for separating a light beam irradiated by the light source device into a plurality of color light components, a plurality of optical modulators for modulating each of the separated color light components in accordance with image information, a color-combining optical device for combining optical images modulated by the plurality of optical modulators and a projection optical device for projecting the combined optical images in an enlarged manner. An optical filter that reflects a predetermined spectral component of the light beam and transmits the other spectral component is disposed in an optical path between the light source device and the optical modulators The optical filter is disposed such that a light-irradiation side surface for irradiating the light beam is inclined by a predetermined angle relative to a plane orthogonal to an optical axis of the light beam.Type: GrantFiled: August 14, 2006Date of Patent: November 13, 2012Assignee: Seiko Epson CorporationInventors: Kiyotaka Nakano, Osamu Fujimaki, Ryo Hyodo
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Patent number: 8287140Abstract: A projector includes: a light valve configured to modulate light emitted from a light source according to image information to form image light; a support and drive unit configured to support a projection lens for projecting the image light formed by the light valve such that the projection lens can be replaced, and shift a mounted lens as the supported projection lens in a first direction within a plane perpendicular to a system optical axis of the entire projector; and a control unit configured to determine information concerning an allowable range of the shift of the mounted lens in the first direction, and control the operation of the support and drive unit such that the shift of the mounted lens lies within the determined allowable range.Type: GrantFiled: February 1, 2010Date of Patent: October 16, 2012Assignee: Seiko Epson CorporationInventor: Osamu Fujimaki
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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: 20100328631Abstract: A projector includes: an illuminator that emits an illumination light flux; a light control mechanism that blocks at least part of the illumination light from the illuminator; a light modulator illuminated with the illumination light from the illuminator; a projection system capable of projecting modulated light formed by the light modulator and switching the f number when the modulated light is projected; and a control unit that controls the open/close state of the light control mechanism in accordance with the f number of the projection system so that illumination light having an angular distribution corresponding to the f number of the projection system is incident on the projection system.Type: ApplicationFiled: June 9, 2010Publication date: December 30, 2010Applicant: SEIKO EPSON CORPORATIONInventors: Kazuhiro NISHIDA, Osamu Fujimaki, Katsumi Tanaka
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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
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Publication number: 20100195063Abstract: A projector includes: a light valve configured to modulate light emitted from a light source according to image information to form image light; a support and drive unit configured to support a projection lens for projecting the image light formed by the light valve such that the projection lens can be replaced, and shift a mounted lens as the supported projection lens in a first direction within a plane perpendicular to a system optical axis of the entire projector; and a control unit configured to determine information concerning an allowable range of the shift of the mounted lens in the first direction, and control the operation of the support and drive unit such that the shift of the mounted lens lies within the determined allowable range.Type: ApplicationFiled: February 1, 2010Publication date: August 5, 2010Applicant: SEIKO EPSON CORPORATIONInventor: Osamu Fujimaki
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Publication number: 20100007854Abstract: In at least one embodiment of the disclosure, an illumination system includes a light source that emits an illumination light flux. A first lens array has a plurality of first small lenses arranged therein. The first small lenses divide the illumination light flux emitted from the light source into a plurality of segmental light fluxes. A second lens array has a plurality of second small lenses arranged therein. The second small lenses have a one-to-one correspondence with the first small lenses and are configured to receive the segmental light fluxes exiting from the first small lenses. At least some of the second small lenses each include a plurality of lens elements disposed in a surface direction that is the same as the second small lenses. A superimposing lens superimposes on an illuminated area the segmental light fluxes exiting from the plurality of second small lenses.Type: ApplicationFiled: June 25, 2009Publication date: January 14, 2010Applicant: Seiko Epson CorporationInventors: Katsumi Tanaka, Osamu Fujimaki
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Publication number: 20070064200Abstract: A projector that includes: a light source; a integrator illumination optical system that divides a light from the light source into a plurality of luminous fluxes, and superimposes the luminous fluxes on an illumination area using an superimposing lens; a color separation system that separates a light from the superimposing lens into first to third color lights; and first to third light modulation devices that modulate the first to third color lights in accordance with image information.Type: ApplicationFiled: August 30, 2006Publication date: March 22, 2007Applicant: Seiko Epson CorporationInventors: Osamu Ishibashi, Osamu Fujimaki, Kiyotaka Nakano
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Publication number: 20070047052Abstract: A projector includes: a light source device, a color-separating optical system for separating a light beam irradiated by the light source device into a plurality of color light components, a plurality of optical modulators for modulating each of the separated color light components in accordance with image information, a color-combining optical device for combining optical images modulated by the plurality of optical modulators and a projection optical device for projecting the combined optical images in an enlarged manner. An optical filter that reflects a predetermined spectral component of the light beam and transmits the other spectral component is disposed in an optical path between the light source device and the optical modulators The optical filter is disposed such that a light-irradiation side surface for irradiating the light beam is inclined by a predetermined angle relative to a plane orthogonal to an optical axis of the light beam.Type: ApplicationFiled: August 14, 2006Publication date: March 1, 2007Applicant: SEIKO EPSON CORPORATIONInventors: Kiyotaka Nakano, Osamu Fujimaki, Ryo Hyodo
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Patent number: 6664839Abstract: In a semiconductor integrated circuit having a first circuit which outputs n (n is an integer of 2 or more) clock signals CKi (i is an integer of 1 to n) each of which is delayed by a delay time of i×T (T is a constant time) from a reference signal, and a second circuit which carries out signal processing using n clock signals input from the first circuit via n signal wirings, for at least a part of the n signal wirings, the positions of the edges of two clock signals transmitted on the two adjacent signal wirings are separated, as seen on the time base, by more than T in the time.Type: GrantFiled: August 19, 2002Date of Patent: December 16, 2003Assignee: NEC Electronics CorporationInventors: Toshikazu Ootake, Osamu Fujimaki
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Publication number: 20030038664Abstract: In a semiconductor integrated circuit having a first circuit which outputs n (n is an integer of 2 or more) clock signals CKi (i is an integer of 1 to n) each of which is delayed by a delay time of i×T (T is a constant time) from a reference signal, and a second circuit which carries out signal processing using n clock signals input from the first circuit via n signal wirings, for at least a part of the n signal wirings, the positions of the edges of two clock signals transmitted on the two adjacent signal wirings are separated, as seen on the time base, by more than T in the time.Type: ApplicationFiled: August 19, 2002Publication date: February 27, 2003Applicant: NEC CorporationInventors: Toshikazu Ootake, Osamu Fujimaki
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Patent number: 6507612Abstract: A bus control circuit of the present invention, which is connected to a request source through a bus, includes a first element which detects a fault of one part of the bus when data is sent through all parts of the bus and a second element which outputs a signal showing that it is impossible to send data through all parts of the bus to the request source when the first element detects the fault. A bus control system of the present invention has a host device, a control circuit, and a bus which connects the host device and the control circuit and includes a first part and a second part. The system includes a first element which is provided in the control circuit and detects a fault of the first part when the host device sends data through the first and second parts. A second element is provided in the control circuit and outputs a signal showing that it is impossible to send data through the first and second parts to the host device.Type: GrantFiled: June 30, 1999Date of Patent: January 14, 2003Assignee: NEC CorporationInventor: Osamu Fujimaki
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Patent number: D558252Type: GrantFiled: November 9, 2005Date of Patent: December 25, 2007Assignee: Seiko Epson CorporationInventors: Toshio Matsumiya, Takeshi Utagawa, Osamu Fujimaki