Patents by Inventor Kazumasa Yoshikawa

Kazumasa Yoshikawa 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).

  • Patent number: 7808547
    Abstract: A drive control apparatus for a lens apparatus having a zoom lens movable between a telephoto end and a wide-angle end according to the present invention comprises a selecting member which selects a zoom position between the telephoto end and the wide-angle end, a controller which has a drive range limiting function of controlling drive of the zoom lens by using the selected zoom position as a drive end, and a drive range switch member which switches the drive range limiting function between an invalid state and a valid state. The controller drives the zoom lens to the drive end when the drive range limiting function is switched to the valid state.
    Type: Grant
    Filed: June 1, 2004
    Date of Patent: October 5, 2010
    Assignee: Canon Kabushiki Kaisha
    Inventors: Keisuke Hirai, Kazumasa Yoshikawa
  • Patent number: 7755695
    Abstract: A camera system is disclosed which allows different types of lens apparatuses to be used in combination with a single image-taking apparatus without requiring changes of focus control signals on the side of the image-taking apparatus depending on the type of a lens apparatus mounted on the image-taking apparatus. The camera system includes an image-taking apparatus which outputs a focus control signal and a lens apparatus which includes a focus lens and is mounted on the image-taking apparatus. The lens apparatus includes a controller which produces a drive signal according to a type of focus of the lens apparatus based on the focus control signal and controls drive of the focus lens based on the drive signal.
    Type: Grant
    Filed: September 29, 2004
    Date of Patent: July 13, 2010
    Assignees: Canon Kabushiki Kaisha, Sony Corporation
    Inventors: Satoshi Natsume, Kazumasa Yoshikawa, Yasuyuki Tomita, Katsumi Karasawa, Takashi Kameyama, Seiji Sato, Hidekazu Suto, Hirotsugu Terada
  • Patent number: 7460166
    Abstract: An image taking apparatus which includes an optical apparatus provided with a focus detection and focusing control unit for controlling a focus lens by an automatic focus detection and focusing control; a remote operation apparatus provided with a first switchover signal inputting unit for performing a switchover between a control of the focus lens by the automatic focus detection and focusing control and a control of the focus lens by a remote instruction control, and a second switchover signal inputting unit for performing a switchover between manual operations of the focus lens by a speed control and a position control; and a switchover signal superposing unit for superposing an output from the first switchover signal inputting unit and an output from the second switchover signal inputting unit.
    Type: Grant
    Filed: May 12, 2004
    Date of Patent: December 2, 2008
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazumasa Yoshikawa, Isao Tanaka
  • Patent number: 7456895
    Abstract: A relay unit connected between a remote control unit and an optical device having a focus lens comprises a first switching signal input unit for switching control of the focus lens between automatic focal point detection focusing and control of the focus lens by remote commands from the remote control unit. This enables remote control of a lens unit simply by replacing the lens unit with one having automatic focus capabilities.
    Type: Grant
    Filed: March 22, 2004
    Date of Patent: November 25, 2008
    Assignee: Canon Kabushiki Kaisha
    Inventor: Kazumasa Yoshikawa
  • Patent number: 7388615
    Abstract: A lens apparatus includes a changing unit for changing a user-specified value in a user-specified data segment to a standard set value at any screen state of a display panel. Therefore, a setting information element for each function regarding image capture in the lens apparatus is changed to a standard setting information element by a particular operation. As a result, problems, such as the activation of an undesired function upon the operation of a switch on a drive unit, and the like, are solved.
    Type: Grant
    Filed: April 4, 2005
    Date of Patent: June 17, 2008
    Assignee: Canon Kabushiki Kaisha
    Inventor: Kazumasa Yoshikawa
  • Patent number: 7280148
    Abstract: The optical control system includes a control unit and an optical apparatus. The control unit includes an output switching section. The output switching section is switchable between a first state, in which the command signal from a command signal generation section is output via a first terminal of a first connector, and a second state, in which a switching signal for selecting the second control section, the voltage level of the switching signal being different from that of the command signal, is output from the first terminal. The control switching section of the optical apparatus selects the first control section in response to input of the command signal, and selects the second control section in response to the switching signal, which is input from the second terminal of the second connector.
    Type: Grant
    Filed: April 20, 2004
    Date of Patent: October 9, 2007
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazumasa Yoshikawa, Isao Tanaka
  • Patent number: 7265788
    Abstract: A lens apparatus in which setting information for each function related to image-capturing with the lens apparatus can be changed only by special operations. The lens apparatus includes an optical device, memory for storing setting data, and a controller for controlling changing the data in the memory. The function settings defined for each subject of TV shooting cannot be easily changed. As such, the problem of accidentally activating unintended functions during the operation of switches on a drive unit can thus be prevented.
    Type: Grant
    Filed: April 4, 2005
    Date of Patent: September 4, 2007
    Assignee: Canon Kabushiki Kaisha
    Inventor: Kazumasa Yoshikawa
  • Patent number: 7158179
    Abstract: Disclosed is an optical device including an optical member, a memory unit for storing preset driving information about driving of the optical member, a driving unit for driving the optical member, an operation unit having an operation member, and a control unit for performing drive control of the driving unit. The control unit changes the preset driving information in accordance with the operation of the operation unit.
    Type: Grant
    Filed: March 29, 2001
    Date of Patent: January 2, 2007
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazumasa Yoshikawa, Satoshi Natsume, Masayuki Sakamoto
  • Patent number: 7095566
    Abstract: A drive controller for a lens apparatus including a first lens unit which moves for changing magnification and a second lens unit which moves to prevent an image plane variation in response to the first lens unit moving to change the magnification. The drive controller includes a memory storing a plurality of tracking data corresponding to position data of the second lens unit, and a control unit for detecting a change in a focus state of the lens apparatus during the movement of the first lens unit and for changing one of the plurality of tracking data based on the detection result. The control unit stores a direction of the changing of the one tracking data and thereafter changes the one tracking data based on the stored direction.
    Type: Grant
    Filed: May 16, 2005
    Date of Patent: August 22, 2006
    Assignee: Canon Kabushiki Kaisha
    Inventors: Noboru Suzuki, Kazumasa Yoshikawa
  • Patent number: 7079182
    Abstract: The invention provides an optical apparatus comprising an optical member, a memory unit for memorizing preset speed information, and preset position information or preset direction information a memory instructing operation unit to be operated for causing the memory unit to memorize the preset speed information, and a control unit for executing preset drive control on the optical member, wherein the control unit is adapted to cause the memory unit to memorize arbitrary preset speed information, or arbitrary preset speed information and arbitrary preset direction information, in response to the operation of the memory instructing operation unit, and to drive the optical member either to a position corresponding to the memorized preset position information with a speed corresponding to the memorized preset speed information, or with a speed corresponding to the memorized preset speed information and with a direction corresponding to the memorized preset direction information.
    Type: Grant
    Filed: October 26, 2000
    Date of Patent: July 18, 2006
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazumasa Yoshikawa, Satoshi Natsume
  • Publication number: 20050254141
    Abstract: A drive controller for a lens apparatus including a first lens unit which moves for changing magnification and a second lens unit which moves to prevent an image plane variation in response to the first lens unit moving to change the magnification. The drive controller includes a memory storing a plurality of tracking data corresponding to position data of the second lens unit, and a control unit for detecting a change in a focus state of the lens apparatus during the movement of the first lens unit and for changing one of the plurality of tracking data based on the detection result. The control unit stores a direction of the changing of the one tracking data and thereafter changes the one tracking data based on the stored direction.
    Type: Application
    Filed: May 16, 2005
    Publication date: November 17, 2005
    Applicant: Canon Kabushiki Kaisha
    Inventors: Noboru Suzuki, Kazumasa Yoshikawa
  • Publication number: 20050225661
    Abstract: A lens apparatus in which setting information for each function related to image-capturing with the lens apparatus can be changed only by special operations. The lens apparatus includes an optical device, memory for storing setting data, and a controller for controlling changing the data in the memory. The function settings defined for each subject of TV shooting cannot be easily changed. As such, the problem of accidentally activating unintended functions during the operation of switches on a drive unit can thus be prevented.
    Type: Application
    Filed: April 4, 2005
    Publication date: October 13, 2005
    Applicant: Canon Kabushiki Kaisha
    Inventor: Kazumasa Yoshikawa
  • Publication number: 20050225660
    Abstract: A lens apparatus includes a changing unit for changing a user-specified value in a user-specified data segment to a standard set value at any screen state of a display panel. Therefore, a setting information element for each function regarding image capture in the lens apparatus is changed to a standard setting information element by a particular operation. As a result, problems, such as the activation of an undesired function upon the operation of a switch on a drive unit, and the like, are solved.
    Type: Application
    Filed: April 4, 2005
    Publication date: October 13, 2005
    Applicant: Canon Kabushiki Kaisha
    Inventor: Kazumasa Yoshikawa
  • Publication number: 20050094023
    Abstract: A camera system is disclosed which allows different types of lens apparatuses to be used in combination with a single image-taking apparatus without requiring changes of focus control signals on the side of the image-taking apparatus depending on the type of a lens apparatus mounted on the image-taking apparatus. The camera system includes an image-taking apparatus which outputs a focus control signal and a lens apparatus which includes a focus lens and is mounted on the image-taking apparatus. The lens apparatus includes a controller which produces a drive signal according to a type of focus of the lens apparatus based on the focus control signal and controls drive of the focus lens based on the drive signal.
    Type: Application
    Filed: September 29, 2004
    Publication date: May 5, 2005
    Inventors: Satoshi Natsume, Kazumasa Yoshikawa, Yasuyuki Tomita, Katsumi Karasawa, Takashi Kameyama, Seiji Sato, Hidekazu Suto, Hirotsugu Terada
  • Publication number: 20040227842
    Abstract: Disclosed is an image taking apparatus which includes an optical apparatus provided with a focus detection and focusing control unit for controlling a focus lens by an automatic focus detection and focusing control; a remote operation apparatus provided with a first switchover signal inputting unit for performing a switchover between a control of the focus lens by the automatic focus detection and focusing control and a control of the focus lens by a remote instruction control, and a second switchover signal inputting unit for performing a switchover between manual operations of the focus lens by a speed control and a position control; and a switchover signal superposing unit for superposing an output from the first switchover signal inputting unit and an output from the second switchover signal inputting unit.
    Type: Application
    Filed: May 12, 2004
    Publication date: November 18, 2004
    Inventors: Kazumasa Yoshikawa, Isao Tanaka
  • Publication number: 20040212722
    Abstract: The optical control system includes a control unit and an optical apparatus. The control unit includes an output switching section. The output switching section is switchable between a first state, in which the command signal from a command signal generation section is output via a first terminal of a first connector, and a second state, in which a switching signal for selecting the second control section, the voltage level of the switching signal being different from that of the command signal, is output from the first terminal. The control switching section of the optical apparatus selects the first control section in response to input of the command signal, and selects the second control section in response to the switching signal, which is input from the second terminal of the second connector.
    Type: Application
    Filed: April 20, 2004
    Publication date: October 28, 2004
    Inventors: Kazumasa Yoshikawa, Isao Tanaka
  • Patent number: D509351
    Type: Grant
    Filed: November 15, 2004
    Date of Patent: September 13, 2005
    Assignee: ASICS Corporation
    Inventors: Toshikazu Kayano, Kazumasa Yoshikawa
  • Patent number: D513115
    Type: Grant
    Filed: November 15, 2004
    Date of Patent: December 27, 2005
    Assignee: ASICS Corporation
    Inventors: Toshikazu Kayano, Kazumasa Yoshikawa
  • Patent number: D514286
    Type: Grant
    Filed: November 15, 2004
    Date of Patent: February 7, 2006
    Assignee: ASICS Corporation
    Inventors: Toshikazu Kayano, Kazumasa Yoshikawa
  • Patent number: D522229
    Type: Grant
    Filed: December 11, 2003
    Date of Patent: June 6, 2006
    Assignee: ASICS Corp.
    Inventors: Seiji Kubo, Kazumasa Yoshikawa