Patents by Inventor Tomoya Takei

Tomoya Takei 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).

  • Publication number: 20190273451
    Abstract: There is provided a drive controller including a determination part that compares a target stop position of a movable body, which is driven by a piezoelectric actuator driven by a piezoelectric element expanded and contracted in response to an applied voltage, with a real position of the movable body acquired on the basis of a position sensor, and determines whether or not the target stop position matches with the real position, and a drive control part that turns off energization of the piezoelectric actuator when the target stop position matches with the real position while the movable body is being driven by the piezoelectric actuator.
    Type: Application
    Filed: May 16, 2019
    Publication date: September 5, 2019
    Inventor: TOMOYA TAKEI
  • Patent number: 10326384
    Abstract: There is provided a drive controller including a determination part that compares a target stop position of a movable body, which is driven by a piezoelectric actuator driven by a piezoelectric element expanded and contracted in response to an applied voltage, with a real position of the movable body acquired on the basis of a position sensor, and determines whether or not the target stop position matches with the real position, and a drive control part that turns off energization of the piezoelectric actuator when the target stop position matches with the real position while the movable body is being driven by the piezoelectric actuator.
    Type: Grant
    Filed: August 4, 2017
    Date of Patent: June 18, 2019
    Assignee: SONY CORPORATION
    Inventor: Tomoya Takei
  • Publication number: 20170338751
    Abstract: There is provided a drive controller including a determination part that compares a target stop position of a movable body, which is driven by a piezoelectric actuator driven by a piezoelectric element expanded and contracted in response to an applied voltage, with a real position of the movable body acquired on the basis of a position sensor, and determines whether or not the target stop position matches with the real position, and a drive control part that turns off energization of the piezoelectric actuator when the target stop position matches with the real position while the movable body is being driven by the piezoelectric actuator.
    Type: Application
    Filed: August 4, 2017
    Publication date: November 23, 2017
    Inventor: TOMOYA TAKEI
  • Patent number: 9762149
    Abstract: There is provided a drive controller including a determination part that compares a target stop position of a movable body, which is driven by a piezoelectric actuator driven by a piezoelectric element expanded and contracted in response to an applied voltage, with a real position of the movable body acquired on the basis of a position sensor, and determines whether or not the target stop position matches with the real position, and a drive control part that turns off energization of the piezoelectric actuator when the target stop position matches with the real position while the movable body is being driven by the piezoelectric actuator.
    Type: Grant
    Filed: September 29, 2014
    Date of Patent: September 12, 2017
    Assignee: SONY CORPORATION
    Inventor: Tomoya Takei
  • Publication number: 20150103234
    Abstract: There is provided a drive controller including a determination part that compares a target stop position of a movable body, which is driven by a piezoelectric actuator driven by a piezoelectric element expanded and contracted in response to an applied voltage, with a real position of the movable body acquired on the basis of a position sensor, and determines whether or not the target stop position matches with the real position, and a drive control part that turns off energization of the piezoelectric actuator when the target stop position matches with the real position while the movable body is being driven by the piezoelectric actuator.
    Type: Application
    Filed: September 29, 2014
    Publication date: April 16, 2015
    Inventor: Tomoya TAKEI
  • Publication number: 20140293461
    Abstract: A drive device includes a moving body having a driven portion with an engagement holding portion and an insertion portion, and an element holding portion holding an optical element; a piezoelectric driver having a piezoelectric element and a drive axis that moves the moving body while being inserted into the insertion portion; and a leaf spring being inserted into the insertion portion, being held by the moving body and urging the drive axis to the driven portion in a pressing direction. In a state in which the leaf spring is inserted into the insertion portion, the leaf spring is elastically deformed in the insertion portion by inserting the drive axis which is inserted into the insertion portion, and the drive axis is pressed against the driven portion by the leaf spring, while the leaf spring is engaged with the engagement holding portion and held by the moving body.
    Type: Application
    Filed: March 17, 2014
    Publication date: October 2, 2014
    Applicant: SONY CORPORATION
    Inventors: HAJIME NAKAMURA, TOMOYA TAKEI, TOSHIAKI EDAMITSU, YUTAKA MAEDA, TSUTOMU NAITOU, TETSU TANAKA
  • Publication number: 20130242421
    Abstract: There are provided a position detection device that makes it possible to enhance the precision of detection, an image pickup apparatus equipped with the position detection device, and a magnet provided in the position detection device. The position detection device includes: a magnet and a magnetic detection device arranged opposite to each other to be relatively movable in a straight-line direction. The magnet has a first surface facing the magnetic detection device, and has periodic projections and recesses arrayed on the first surface in a relative movement direction.
    Type: Application
    Filed: March 5, 2013
    Publication date: September 19, 2013
    Applicant: SONY CORPORATION
    Inventor: Tomoya Takei
  • Patent number: 8269841
    Abstract: An optical element driving device includes an optical element holder, first and second magnets, first and second magnetic bodies each having a cross section including a vertex and first and second legs forming an opening therebetween, first and second piezoelectric elements that move the optical element holder in directions perpendicular to each other by slidingly moving the first and second magnetic bodies by vibrating the first and second magnets, and first and second magnetic sensors that detect a position of the optical element holder, wherein the first and second piezoelectric elements are driven in a state in which the first and second magnets are coupled to the first and second legs from the opening side, wherein the first and second magnets are each magnetized in directions perpendicular to a magnetization line, and wherein the second magnetic sensor is disposed at a position that is not on the magnetization line.
    Type: Grant
    Filed: August 30, 2010
    Date of Patent: September 18, 2012
    Assignee: Sony Corporation
    Inventor: Tomoya Takei
  • Patent number: 8131141
    Abstract: A lens position detecting device 200 has a position detecting magnet 202, a magnetic force detecting sensor 204, a positional information generating means 206, etc. The position detecting magnet 202 is mounted on a rear surface of a lens holder frame 1460. The magnetic force detecting sensor 204 serves to generate a detected signal having a magnitude depending on the intensity of a magnetic force generated from the magnetic poles of the position detecting magnet 202. The magnetic force detecting sensor 204 is disposed on a straight line that passes through the position detecting magnet 202 parallel to the optical axis. The magnetic force detecting sensor 204 outputs a detected signal having a voltage corresponding (proportional) to the intensity of the magnetic force. An amplifying circuit 208 of a positional information generating means 206 amplifies the detected signal Ss from the magnetic force detecting sensor 204.
    Type: Grant
    Filed: August 18, 2005
    Date of Patent: March 6, 2012
    Assignee: Sony Corporation
    Inventors: Tomoya Takei, Toshifumi Takaoka, Hideo Takagi, Yoshikazu Ito, Masanori Hayashi, Tomohiro Yasui, Hideki Yamaoka, Kentaro Tashita
  • Patent number: 7986468
    Abstract: A lens barrel including: an imaging optical system; a tube configured to contain the imaging optical system; a holder configured to hold a lens included in the imaging optical system in the tube in such a way that the lens is movable along a direction of an optical axis of the imaging optical system; a sensor unit configured to output a cyclic detection signal whose peak value changes depending on a movement amount of the holder; a memory unit configured to store a relationship between peak values of the detection signal and a position of the holder in the direction of the optical axis in advance; and an arithmetic processor configured to calculate a position of the holder in the direction of the optical axis from a peak value of a detection signal detected by the sensor unit in movement of the holder based on the relationship stored in the memory unit.
    Type: Grant
    Filed: January 16, 2009
    Date of Patent: July 26, 2011
    Assignee: Sony Corporation
    Inventors: Kentaro Abe, Tomoya Takei
  • Publication number: 20110102665
    Abstract: An optical element driving device includes an optical element holder, first and second magnets, first and second magnetic bodies each having a cross section including a vertex and first and second legs forming an opening therebetween, first and second piezoelectric elements that move the optical element holder in directions perpendicular to each other by slidingly moving the first and second magnetic bodies by vibrating the first and second magnets, and first and second magnetic sensors that detect a position of the optical element holder, wherein the first and second piezoelectric elements are driven in a state in which the first and second magnets are coupled to the first and second legs from the opening side, wherein the first and second magnets are each magnetized in directions perpendicular to a magnetization line, and wherein the second magnetic sensor is disposed at a position that is not on the magnetization line.
    Type: Application
    Filed: August 30, 2010
    Publication date: May 5, 2011
    Applicant: Sony Corporation
    Inventor: Tomoya Takei
  • Patent number: 7840128
    Abstract: An image-blur compensating device includes an optical component configured to compensate blur in an image, an actuator driving the optical component, a displacement detector detecting a position of the optical component changed by the actuator, an angular velocity detector detecting an angular velocity applied from outside, and a target displacement calculator calculating a driving amount when the actuator has driven the optical axis changing unit based on the angular velocity detected by the angular velocity detector and the position detected by the displacement detector. The target displacement calculator then obtains, as a result of compensating an amount of influence on the position of the optical component, a driving amount when driving the actuator based on the calculated driving amount. The image-blur compensating device further includes a driver driving the actuator based on the driving amount calculated by the target displacement calculator.
    Type: Grant
    Filed: June 18, 2008
    Date of Patent: November 23, 2010
    Assignee: Sony Corporation
    Inventors: Hideo Takagi, Tatsuyuki Takahashi, Toshifumi Takaoka, Tomoya Takei
  • Publication number: 20090185285
    Abstract: A lens barrel including: an imaging optical system; a tube configured to contain the imaging optical system; a holder configured to hold a lens included in the imaging optical system in the tube in such a way that the lens is movable along a direction of an optical axis of the imaging optical system; a sensor unit configured to output a cyclic detection signal whose peak value changes depending on a movement amount of the holder; a memory unit configured to store a relationship between peak values of the detection signal and a position of the holder in the direction of the optical axis in advance; and an arithmetic processor configured to calculate a position of the holder in the direction of the optical axis from a peak value of a detection signal detected by the sensor unit in movement of the holder based on the relationship stored in the memory unit.
    Type: Application
    Filed: January 16, 2009
    Publication date: July 23, 2009
    Inventors: Kentaro ABE, Tomoya Takei
  • Publication number: 20090034950
    Abstract: Disclosed is an image-blur compensating device including an optical axis changing unit changing an optical axis, an actuator driving the optical axis changing unit, a displacement detector detecting a position of the optical axis changed by the optical axis changing unit, an angular velocity detector detecting an angular velocity applied from outside, and a target displacement calculator calculating a driving amount when the actuator has driven the optical axis changing unit based on the angular velocity detected by the angular velocity detector and the position detected by the displacement detector. The target displacement calculator then obtains, as a result of compensating an amount of influence on the position of the optical axis, a driving amount when driving the actuator based on the calculated driving amount. The image-blur compensating device further includes a driver driving the actuator based on the driving amount calculated by the target displacement calculator.
    Type: Application
    Filed: June 18, 2008
    Publication date: February 5, 2009
    Applicant: Sony Corporation
    Inventors: Hideo Takagi, Tatsuyuki Takahashi, Toshifumi Takaoka, Tomoya Takei
  • Patent number: 7342733
    Abstract: A lens actuating device moves a movable lens held by a lens holder in predetermined directions. The lens actuating device has a power transmitting shaft connected to the lens holder for movement in axial directions thereof, and a fluid case having a shaft support sleeve and filled with a working fluid, the power transmitting shaft being axially slidably supported in the shaft support sleeve. The fluid case includes a piezoelectric device as a portion thereof. When a drive voltage is applied to the piezoelectric device, the piezoelectric device can be deformed to displace the working fluid in the fluid case to move the power transmitting shaft axially, thereby moving the lens holder and the movable lens in the predetermined directions.
    Type: Grant
    Filed: June 5, 2006
    Date of Patent: March 11, 2008
    Assignee: Sony Corporation
    Inventor: Tomoya Takei
  • Publication number: 20070273364
    Abstract: A lens position detecting device 200 has a position detecting magnet 202, a magnetic force detecting sensor 204, a positional information generating means 206, etc. The position detecting magnet 202 is mounted on a rear surface of a lens holder frame 1460. The magnetic force detecting sensor 204 serves to generate a detected signal having a magnitude depending on the intensity of a magnetic force generated from the magnetic poles of the position detecting magnet 202. The magnetic force detecting sensor 204 is disposed on a straight line that passes through the position detecting magnet 202 parallel to the optical axis. The magnetic force detecting sensor 204 outputs a detected signal having a voltage corresponding (proportional) to the intensity of the magnetic force. An amplifying circuit 208 of a positional information generating means 206 amplifies the detected signal Ss from the magnetic force detecting sensor 204.
    Type: Application
    Filed: August 18, 2005
    Publication date: November 29, 2007
    Inventors: Tomoya Takei, Toshifumi Takaoka, Hideo Takagi, Yoshikazu Ito, Masanori Hayashi, Tomohiro Yasui, Hideki Yamaoka, Kentaro Tashita
  • Publication number: 20060279849
    Abstract: A lens actuating device moves a movable lens held by a lens holder in predetermined directions. The lens actuating device has a power transmitting shaft connected to the lens holder for movement in axial directions thereof, and a fluid case having a shaft support sleeve and filled with a working fluid, the power transmitting shaft being axially slidably supported in the shaft support sleeve. The fluid case includes a piezoelectric device as a portion thereof. When a drive voltage is applied to the piezoelectric device, the piezoelectric device can be deformed to displace the working fluid in the fluid case to move the power transmitting shaft axially for thereby moving the lens holder and the movable lens in the predetermined directions.
    Type: Application
    Filed: June 5, 2006
    Publication date: December 14, 2006
    Applicant: Sony Corporation
    Inventor: Tomoya Takei
  • Patent number: 6968129
    Abstract: To enable the thrust of a linear actuator comprised of a driving magnet and a drive coil to act in a fixed and stable manner, the present invention is a lens driving device that comprises a driven body supporting an optical lens capable of freely moving along an optical axis direction, a drive coil fitted to the driven body, and a magnet having a surface set so as to have a prescribed gap with the moving drive coil, wherein a gap between the surface of the magnet and the drive coil is set in such a manner as to be broader at a central part of the range of movement of the drive coil than at an end part.
    Type: Grant
    Filed: April 6, 2004
    Date of Patent: November 22, 2005
    Assignee: Sony Corporation
    Inventors: Tomoya Takei, Shinichi Orimo
  • Publication number: 20040234258
    Abstract: To enable thrust of a linear actuator comprised of a driving magnet and a drive coil to act in a fixed and stable manner, the present invention is a lens driving device that comprises a driven body supporting an optical lens capable of freely moving along an optical axis direction, a drive coil fitted to the driven body, and a magnet having a surface set so as to have a prescribed gap with the moving drive coil, wherein a gap between the surface of the magnet and the drive coil is set in such a manner as to be broader at a central part of a range of movement of the drive coil than at an end part.
    Type: Application
    Filed: April 6, 2004
    Publication date: November 25, 2004
    Inventors: Tomoya Takei, Shinichi Orimo