Patents by Inventor Akira Nemura
Akira Nemura 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: 11537032Abstract: An optical path shifting device includes: a holding frame holding a rectangular glass plate; a support part supporting the holding frame in a swingable state; an actuator causing the holding frame to swing; a magnetic sensor detecting a position of the holding frame; and a thermistor detecting a temperature of the magnetic sensor. A drive signal processing circuit includes: an amplifier amplifying a reference signal to generate a drive signal and supplying the drive signal to the actuator; and a signal processing unit inputting the reference signal and an amplifier gain to the amplifier. The signal processing unit performs gain adjustment processing to correct an amplitude value found from an output from the magnetic sensor, based on an output from the thermistor, and to adjust the amplifier gain, based on a corrected value.Type: GrantFiled: November 14, 2019Date of Patent: December 27, 2022Assignee: Seiko Epson CorporationInventors: Shinichi Wakabayashi, Akira Nemura, Takao Hirakura, Daisuke Yanagihara, Nozomi Fujishige, Kazunori Maeta
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Patent number: 11131428Abstract: An adjusting mechanism includes a movable plate having a substantially rectangular shape and including a long side and a short side, a position adjusting actuator configured to come into contact with and press the movable plate, a reference plate on which the movable plate is placed, and an elastic member coupling the movable plate and the reference plate, the elastic member being elastically deformable in a direction along an X axis. The position adjusting actuator adjusts a position of the movable plate with respect to the reference plate when the position adjusting actuator presses the movable plate in the direction along the X axis and moves the movable plate in the direction along the X axis and a ?z direction.Type: GrantFiled: February 24, 2020Date of Patent: September 28, 2021Assignee: SEIKO EPSON CORPORATIONInventors: Akira Nemura, Tomohisa Iwazaki, Yutaka Arakawa
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Patent number: 10989992Abstract: An adjusting mechanism for adjusting a position of a display panel includes a first plate including a placing portion on which the display panel is placed, a second plate on which the first plate is placed, the second plate disposed on the opposite side of a display panel side with respect to the first plate, a third plate on which the second plate is placed, the third plate disposed on an opposite side of a first plate side with respect to the second plate, a first position adjusting actuator configured to move the first plate in a direction along a Z axis, a ?x direction, and a ?y direction, a second position adjusting actuator configured to move the second plate in a direction along an X axis and a ?z direction, and a third position adjusting actuator configured to move the third plate in a direction along the Y axis.Type: GrantFiled: February 24, 2020Date of Patent: April 27, 2021Assignee: SEIKO EPSON CORPORATIONInventors: Akira Nemura, Yutaka Arakawa, Tomohisa Iwazaki
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Publication number: 20200271271Abstract: An adjusting mechanism includes a movable plate having a substantially rectangular shape and including a long side and a short side, a position adjusting actuator configured to come into contact with and press the movable plate, a reference plate on which the movable plate is placed, and an elastic member coupling the movable plate and the reference plate, the elastic member being elastically deformable in a direction along an X axis. The position adjusting actuator adjusts a position of the movable plate with respect to the reference plate when the position adjusting actuator presses the movable plate in the direction along the X axis and moves the movable plate in the direction along the X axis and a ?z direction.Type: ApplicationFiled: February 24, 2020Publication date: August 27, 2020Applicant: SEIKO EPSON CORPORATIONInventors: Akira NEMURA, Tomohisa IWAZAKI, Yutaka ARAKAWA
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Publication number: 20200272035Abstract: An adjusting mechanism for adjusting a position of a display panel includes a first plate including a placing portion on which the display panel is placed, a second plate on which the first plate is placed, the second plate disposed on the opposite side of a display panel side with respect to the first plate, a third plate on which the second plate is placed, the third plate disposed on an opposite side of a first plate side with respect to the second plate, a first position adjusting actuator configured to move the first plate in a direction along a Z axis, a ?x direction, and a ?y direction, a second position adjusting actuator configured to move the second plate in a direction along an X axis and a ?z direction, and a third position adjusting actuator configured to move the third plate in a direction along the Y axis.Type: ApplicationFiled: February 24, 2020Publication date: August 27, 2020Applicant: SEIKO EPSON CORPORATIONInventors: Akira NEMURA, Yutaka ARAKAWA, Tomohisa IWAZAKI
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Publication number: 20200159093Abstract: An optical path shifting device includes: a holding frame holding a rectangular glass plate; a support part supporting the holding frame in a swingable state; an actuator causing the holding frame to swing; a magnetic sensor detecting a position of the holding frame; and a thermistor detecting a temperature of the magnetic sensor. A drive signal processing circuit includes: an amplifier amplifying a reference signal to generate a drive signal and supplying the drive signal to the actuator; and a signal processing unit inputting the reference signal and an amplifier gain to the amplifier. The signal processing unit performs gain adjustment processing to correct an amplitude value found from an output from the magnetic sensor, based on an output from the thermistor, and to adjust the amplifier gain, based on a corrected value.Type: ApplicationFiled: November 14, 2019Publication date: May 21, 2020Applicant: SEIKO EPSON CORPORATIONInventors: Shinichi WAKABAYASHI, Akira NEMURA, Takao HIRAKURA, Daisuke YANAGIHARA, Nozomi FUJISHIGE, Kazunori MAETA
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Patent number: 10571785Abstract: Provided is a lens alignment adjustment device capable of suitably correcting an angle accuracy of an optical axis of a lens unit with respect to a projector main body. A lens alignment adjustment device is provided to a projector to retain a projection lens, and is capable of adjusting inclination of an optical axis of the projection lens with respect to the projector. The lens alignment adjustment device includes: a base plate which is retained in a predetermined posture with respect to the projector; and a lens fixing plate to which the projection lens is fixed. The lens fixing plate is rockably coupled to the base plate through intermediation of a first center pin orthogonal to an optical axis of the projection lens. First adjusting means for setting an inclination angle of the lens fixing plate with respect to the base plate about the first center pin is provided.Type: GrantFiled: January 13, 2017Date of Patent: February 25, 2020Assignees: THK CO., LTD., SEIKO EPSON CORPORATIONInventors: Noriaki Chikamoto, Hiroyuki Furui, Akira Nemura
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Patent number: 10460424Abstract: A projector includes a light source, a light modulator that has an image drawing region where an image is drawable and modulates light emitted from the light source by using an image drawn in the image drawing region, and a projection system that includes a projection lens and projects image light modulated by the light modulator. The projector further includes a lens shift mechanism that moves the projection lens and a control section that controls the image drawing performed by the light modulator, and the control section provides, based on the position of the projection lens, the image drawing region of the light modulator with a suppression region where the amount of the image light is suppressed.Type: GrantFiled: July 28, 2017Date of Patent: October 29, 2019Assignee: SEIKO EPSON CORPORATIONInventors: Shuji Narimatsu, Takateru Mori, Akira Nemura, Hiroyuki Furui
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Publication number: 20190033696Abstract: Provided is a lens alignment adjustment device capable of suitably correcting an angle accuracy of an optical axis of a lens unit with respect to a projector main body. A lens alignment adjustment device is provided to a projector to retain a projection lens, and is capable of adjusting inclination of an optical axis of the projection lens with respect to the projector. The lens alignment adjustment device includes: a base plate which is retained in a predetermined posture with respect to the projector; and a lens fixing plate to which the projection lens is fixed. The lens fixing plate is rockably coupled to the base plate through intermediation of a first center pin orthogonal to an optical axis of the projection lens. First adjusting means for setting an inclination angle of the lens fixing plate with respect to the base plate about the first center pin is provided.Type: ApplicationFiled: January 13, 2017Publication date: January 31, 2019Applicants: THK CO., LTD., SEIKO EPSON CORPORATIONInventors: Noriaki Chikamoto, Hiroyuki Furui, Akira Nemura
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Patent number: 10146111Abstract: A light adjuster includes: a first light shield and a second light shield disposed across a central axis of an emitted light beam; a drive section; a movement mechanism configured to move the first light shield and the second light shield using a driving force; a board; and a cover member combined with the board, in which the movement mechanism includes: a pinion gear; and a first gear and a second gear configured to be rotated in conjunction with a rotation of the pinion gear, the first light shield is attached to the first gear, the second light shield is attached to the second gear, and the cover member supports the first gear and the second gear so that the first gear and the second gear are rotatable, and is combined with the board to cover the pinion gear, the first gear and the second gear.Type: GrantFiled: July 20, 2017Date of Patent: December 4, 2018Assignee: SEIKO EPSON CORPORATIONInventors: Akira Nemura, Shinichi Wakabayashi, Keita Tsukioka, Satoshi Chikuni
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Patent number: 9933695Abstract: A position detection device includes: a sensor that includes a light emission unit and a light reception unit receiving light emitted from the light emission unit; a driving unit; a gear (transmission gear) that is disposed at a position facing the sensor and is rotated by power from the driving unit; and a control unit that drives the driving unit based on an amount of light received by the light reception unit and detected by the sensor.Type: GrantFiled: January 17, 2017Date of Patent: April 3, 2018Assignee: Seiko Epson CorporationInventors: Hirofumi Okubo, Kazunori Maeta, Akira Nemura
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Publication number: 20180031956Abstract: A light adjuster includes: a first light shield and a second light shield disposed across a central axis of an emitted light beam; a drive section; a movement mechanism configured to move the first light shield and the second light shield using a driving force; a board; and a cover member combined with the board, in which the movement mechanism includes: a pinion gear; and a first gear and a second gear configured to be rotated in conjunction with a rotation of the pinion gear, the first light shield is attached to the first gear, the second light shield is attached to the second gear, and the cover member supports the first gear and the second gear so that the first gear and the second gear are rotatable, and is combined with the board to cover the pinion gear, the first gear and the second gear.Type: ApplicationFiled: July 20, 2017Publication date: February 1, 2018Applicant: SEIKO EPSON CORPORATIONInventors: Akira NEMURA, Shinichi WAKABAYASHI, Keita TSUKIOKA, Satoshi CHIKUNI
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Publication number: 20180033123Abstract: A projector includes a light source, a light modulator that has an image drawing region where an image is drawable and modulates light emitted from the light source by using an image drawn in the image drawing region, and a projection system that includes a projection lens and projects image light modulated by the light modulator. The projector further includes a lens shift mechanism that moves the projection lens and a control section that controls the image drawing performed by the light modulator, and the control section provides, based on the position of the projection lens, the image drawing region of the light modulator with a suppression region where the amount of the image light is suppressed.Type: ApplicationFiled: July 28, 2017Publication date: February 1, 2018Applicant: SEIKO EPSON CORPORATIONInventors: Shuji NARIMATSU, Takateru MORI, Akira NEMURA, Hiroyuki FURUI
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Publication number: 20170205699Abstract: A position detection device includes: a sensor that includes a light emission unit and a light reception unit receiving light emitted from the light emission unit; a driving unit; a gear (transmission gear) that is disposed at a position facing the sensor and is rotated by power from the driving unit; and a control unit that drives the driving unit based on an amount of light received by the light reception unit and detected by the sensor.Type: ApplicationFiled: January 17, 2017Publication date: July 20, 2017Inventors: Hirofumi Okubo, Kazunori Maeta, Akira Nemura
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Patent number: 9535312Abstract: A lens shift mechanism includes a movable portion configured to support a projection lens and movable in two directions orthogonal to each other in a plane orthogonal to an optical axis; first and second operating units configured to generate drive forces for moving the movable portion in the two directions, respectively, first and second rotating portions to which the drive forces generated by the first and second operating units are transmitted, and a lock mechanism configured to be capable of switching between a locked state in which the two operating units are locked and an unlocked state in which the two rotating portions are rotatable, and the lock mechanism includes first and second locking members configured to lock the first and second rotating portions respectively and a lever mechanism configured to move the two locking members.Type: GrantFiled: September 1, 2015Date of Patent: January 3, 2017Assignee: Seiko Epson CorporationInventor: Akira Nemura
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Patent number: 9482934Abstract: A projector includes: an optical unit body having a light modulating apparatus configured to modulate an optical flux emitted from a light source according to image information; a projection lens configured to project the optical flux modulated by the light modulating apparatus; and an adjusting mechanism configured to adjust an inclination of the projection lens with respect to the optical unit body. The adjusting mechanism includes; a supporting portion configured to support the projection lens; a base portion configured to constitute part of the optical unit body; a clamping portion configured to clamp the base portion in cooperation with the supporting portion; a fixing member configured to fix the supporting portion to the clamping portion; and adjusting members configured to be capable of adjusting a distance between the base portion and the supporting portion.Type: GrantFiled: September 20, 2013Date of Patent: November 1, 2016Assignee: Seiko Epson CorporationInventors: Akira Nemura, Masayuki Okoshi
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Publication number: 20150370152Abstract: A lens shift mechanism includes a movable portion configured to support a projection lens and movable in two directions orthogonal to each other in a plane orthogonal to an optical axis; first and second operating units configured to generate drive forces for moving the movable portion in the two directions, respectively, first and second rotating portions to which the drive forces generated by the first and second operating units are transmitted, and a lock mechanism configured to be capable of switching between a locked state in which the two operating units are locked and an unlocked state in which the two rotating portions are rotatable, and the lock mechanism includes first and second locking members configured to lock the first and second rotating portions respectively and a lever mechanism configured to move the two locking members.Type: ApplicationFiled: September 1, 2015Publication date: December 24, 2015Inventor: Akira Nemura
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Patent number: 9154755Abstract: A lens shift mechanism includes a movable portion configured to support a projection lens and movable in two directions orthogonal to each other in a plane orthogonal to an optical axis; first and second operating units configured to generate drive forces for moving the movable portion in the two directions, respectively, first and second rotating portions to which the drive forces generated by the first and second operating units are transmitted, and a lock mechanism configured to be capable of switching between a locked state in which the two operating units are locked and an unlocked state in which the two rotating portions are rotatable, and the lock mechanism includes first and second locking members configured to lock the first and second rotating portions respectively and a lever mechanism configured to move the two locking members.Type: GrantFiled: September 19, 2013Date of Patent: October 6, 2015Assignee: Seiko Epson CorporationInventor: Akira Nemura
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Publication number: 20140092371Abstract: A projector includes: an optical unit body having a light modulating apparatus configured to modulate an optical flux emitted from a light source according to image information; a projection lens configured to project the optical flux modulated by the light modulating apparatus; and an adjusting mechanism configured to adjust an inclination of the projection lens with respect to the optical unit body. The adjusting mechanism includes; a supporting portion configured to support the projection lens; a base portion configured to constitute part of the optical unit body; a clamping portion configured to clamp the base portion in cooperation with the supporting portion; a fixing member configured to fix the supporting portion to the clamping portion; and adjusting members configured to be capable of adjusting a distance between the base portion and the supporting portion.Type: ApplicationFiled: September 20, 2013Publication date: April 3, 2014Applicant: Seiko Epson CorporationInventors: Akira Nemura, Masayuki Okoshi
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Publication number: 20140092370Abstract: A lens shift mechanism includes a movable portion configured to support a projection lens and movable in two directions orthogonal to each other in a plane orthogonal to an optical axis; first and second operating units configured to generate drive forces for moving the movable portion in the two directions, respectively, first and second rotating portions to which the drive forces generated by the first and second operating units are transmitted, and a lock mechanism configured to be capable of switching between a locked state in which the two operating units are locked and an unlocked state in which the two rotating portions are rotatable, and the lock mechanism includes first and second locking members configured to lock the first and second rotating portions respectively and a lever mechanism configured to move the two locking members.Type: ApplicationFiled: September 19, 2013Publication date: April 3, 2014Applicant: Seiko Epson CorporationInventor: Akira Nemura