Patents by Inventor Christopher C. Chang

Christopher C. Chang 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: 11870385
    Abstract: A linear motor includes a magnetic assembly and a coil assembly having at least one coil positioned to magnetically engage the magnetic assembly for linear displacement between the magnetic assembly and the coil assembly. The linear motor further includes an encoder strip attached to one of the magnetic assembly and the coil assembly and an encoder reader attached to the other one of the magnetic assembly and the coil assembly to read the encoder strip during the linear displacement between the magnetic assembly and the coil assembly.
    Type: Grant
    Filed: February 16, 2022
    Date of Patent: January 9, 2024
    Assignee: Arcus Technology, Inc.
    Inventor: Christopher C. Chang
  • Patent number: 11615659
    Abstract: A motion system and method of managing health of the motion system uses at least one multi-dimensional motor operational parameter (MOP) model and motion variables used by a servo drive of the motion system to calculate at least one health indication value for the motion system. The health indication value is used to generate a notification for maintenance of the motion system.
    Type: Grant
    Filed: March 2, 2021
    Date of Patent: March 28, 2023
    Assignee: ARCUS TECHNOLOGY, INC.
    Inventor: Christopher C. Chang
  • Publication number: 20220263439
    Abstract: A linear motor includes a magnetic assembly and a coil assembly having at least one coil positioned to magnetically engage the magnetic assembly for linear displacement between the magnetic assembly and the coil assembly. The linear motor further includes an encoder strip attached to one of the magnetic assembly and the coil assembly and an encoder reader attached to the other one of the magnetic assembly and the coil assembly to read the encoder strip during the linear displacement between the magnetic assembly and the coil assembly.
    Type: Application
    Filed: February 16, 2022
    Publication date: August 18, 2022
    Inventor: Christopher C. Chang
  • Patent number: 11237212
    Abstract: A motion system and method for motion performance modeling and monitoring the motion system uses a baseline motion performance model of the motion system, which is created by collecting motor operating variables, to compare real-time motor operating variables with values of the baseline motion performance model to determine the performance state of the motion system.
    Type: Grant
    Filed: January 8, 2018
    Date of Patent: February 1, 2022
    Assignee: ARCUS TECHNOLOGY, INC.
    Inventor: Christopher C. Chang
  • Publication number: 20210183184
    Abstract: A motion system and method of managing health of the motion system uses at least one multi-dimensional motor operational parameter (MOP) model and motion variables used by a servo drive of the motion system to calculate at least one health indication value for the motion system. The health indication value is used to generate a notification for maintenance of the motion system.
    Type: Application
    Filed: March 2, 2021
    Publication date: June 17, 2021
    Inventor: Christopher C. Chang
  • Patent number: 10935954
    Abstract: A motion system and method of managing health of the motion system uses exclusively motion variables used by a servo drive of the motion system to calculate at least one health indication value for the motion system. The health indication value is used to generate a notification for maintenance of the motion system.
    Type: Grant
    Filed: May 16, 2019
    Date of Patent: March 2, 2021
    Assignee: ARCUS TECHNOLOGY, INC.
    Inventor: Christopher C. Chang
  • Patent number: 10910970
    Abstract: A motor and a method of operating the motor uses an encoder disk attached to the rotor of the motor and an encoder reader positioned to optically obtain rotational information of the rotor. The encoder disk and the encoder reader are located within an interior region of the stator of the motor in which the rotor is positioned to rotate.
    Type: Grant
    Filed: June 21, 2019
    Date of Patent: February 2, 2021
    Assignee: ARCUS TECHNOLOGY, INC.
    Inventor: Christopher C. Chang
  • Publication number: 20190393814
    Abstract: A motor and a method of operating the motor uses an encoder disk attached to the rotor of the motor and an encoder reader positioned to optically obtain rotational information of the rotor. The encoder disk and the encoder reader are located within an interior region of the stator of the motor in which the rotor is positioned to rotate.
    Type: Application
    Filed: June 21, 2019
    Publication date: December 26, 2019
    Inventor: Christopher C. Chang
  • Publication number: 20190354077
    Abstract: A motion system and method of managing health of the motion system uses exclusively motion variables used by a servo drive of the motion system to calculate at least one health indication value for the motion system. The health indication value is used to generate a notification for maintenance of the motion system.
    Type: Application
    Filed: May 16, 2019
    Publication date: November 21, 2019
    Inventor: Christopher C. Chang
  • Patent number: 10244220
    Abstract: A multi-camera time slice system and method of producing a three-dimensional (3D) integrated time slice image array uses multiple cameras to capture a subject to produce an array of subject images with transparent backgrounds. The array of subject images with transparent backgrounds is merged with an array of foreground images with transparent backgrounds and an array of background images, which are captured in a similar manner as the array of subject images, to produce the 3D integrated time slice image array.
    Type: Grant
    Filed: February 6, 2017
    Date of Patent: March 26, 2019
    Inventors: Christopher C. Chang, Joshua Minsung Chang
  • Publication number: 20180196104
    Abstract: A motion system and method for motion performance modeling and monitoring the motion system uses a baseline motion performance model of the motion system, which is created by collecting motor operating variables, to compare real-time motor operating variables with values of the baseline motion performance model to determine the performance state of the motion system.
    Type: Application
    Filed: January 8, 2018
    Publication date: July 12, 2018
    Inventor: Christopher C. Chang
  • Publication number: 20170230631
    Abstract: A multi-camera time slice system and method of producing a three-dimensional (3D) integrated time slice image array uses multiple cameras to capture a subject to produce an array of subject images with transparent backgrounds. The array of subject images with transparent backgrounds is merged with an array of foreground images with transparent backgrounds and an array of background images, which are captured in a similar manner as the array of subject images, to produce the 3D integrated time slice image array.
    Type: Application
    Filed: February 6, 2017
    Publication date: August 10, 2017
    Inventors: Christopher C. Chang, Joshua Minsung Chang
  • Patent number: 9066024
    Abstract: A multi-camera system and method of calibrating the multi-camera system uses at least one timer to synchronize cameras of the multi-camera system with respect to time. The cameras are used to capture images of the at least one timer. The images are then analyzed to adjust an image-capture timing parameter of at least one of the cameras to time synchronize the cameras.
    Type: Grant
    Filed: June 8, 2012
    Date of Patent: June 23, 2015
    Inventors: Christopher C. Chang, Joshua Minsung Chang
  • Patent number: 8486841
    Abstract: A corrosion resistant component of a plasma chamber includes a liquid crystalline polymer. In a preferred embodiment, the liquid crystalline polymer (LCP) is provided on an aluminum component having an anodized or non-anodized surface. The liquid crystalline polymer can also be provided on an alumina component. The liquid crystalline polymer can be deposited by a method such as plasma spraying. The liquid crystalline polymer may also be provided as a preformed sheet or other shape adapted to cover the exposed surfaces of the reaction chamber. Additionally, the reactor components may be made entirely from liquid crystalline polymer by machining the component from a solid block of liquid crystalline polymer or molding the component from the polymer. The liquid crystalline polymer may contain reinforcing fillers such as glass or mineral fillers.
    Type: Grant
    Filed: September 14, 2009
    Date of Patent: July 16, 2013
    Assignee: Lam Research Corporation
    Inventors: Robert J. O'Donnell, Christopher C. Chang, John E. Daugherty
  • Patent number: 8436293
    Abstract: An optical encoder and method for measuring displacement information uses an encoder member that includes multiple optical tracks of diffractive optical regions having different periodicities with respect to consecutive identical diffractive optical regions to produce diffracted beams of light from at least one beam of light emitted from a light source. The diffracted beams of light are received at photodetectors, which produce electrical signals in response to the received beams of light. The electrical signals are related to the displacement information being measured.
    Type: Grant
    Filed: February 23, 2010
    Date of Patent: May 7, 2013
    Inventor: Christopher C. Chang
  • Patent number: 8368257
    Abstract: A linear brushless DC motor uses a movable coil assembly, which includes at least one coil, an amplifier and a motor controller, that is configured to move relative to a stationary base assembly. The coil, the amplifier and the motor controller are assembled so that the coil, the amplifier and the motor controller are collectively displaced when the movable coil assembly is moved relative to the stationary base assembly.
    Type: Grant
    Filed: October 23, 2009
    Date of Patent: February 5, 2013
    Assignee: Arcus Technology, Inc.
    Inventor: Christopher C. Chang
  • Publication number: 20120314089
    Abstract: A multi-camera system and method of calibrating the multi-camera system uses at least one timer to synchronize cameras of the multi-camera system with respect to time. The cameras are used to capture images of the at least one timer. The images are then analyzed to adjust an image-capture timing parameter of at least one of the cameras to time synchronize the cameras.
    Type: Application
    Filed: June 8, 2012
    Publication date: December 13, 2012
    Inventors: Christopher C. Chang, Joshua Minsung Chang
  • Patent number: 8044339
    Abstract: An optical encoder and method for measuring displacement information using an optical encoder uses an encoder member with multiple digital diffractive optic regions to optically diffract an incident beam of light to produce output beams of light having intensity distribution patterns, which are used to generate electrical signals that provide relative displacement information of the encoder member.
    Type: Grant
    Filed: January 2, 2009
    Date of Patent: October 25, 2011
    Assignee: Arcus Technology, Inc.
    Inventors: Christopher C. Chang, Bernard C. Kress
  • Patent number: 8030876
    Abstract: A stepper motor device uses compensating non-sinusoidal driving values to compensate for operational non-sinusoidal drive characteristics of a motor of the device due to at least design and manufacturing imperfections in the motor. The compensating non-sinusoidal driving values may be derived using back electromagnetic force produced from the motor or using measured rotational positions of the motor when the motor is driven using known driving values.
    Type: Grant
    Filed: September 29, 2008
    Date of Patent: October 4, 2011
    Assignee: Arcus Technology, Inc.
    Inventors: Christopher C. Chang, Edward Li, Thomas Judge
  • Publication number: 20100213358
    Abstract: An optical encoder and method for measuring displacement information uses an encoder member that includes multiple optical tracks of diffractive optical regions having different periodicities with respect to consecutive identical diffractive optical regions to produce diffracted beams of light from at least one beam of light emitted from a light source. The diffracted beams of light are received at photodetectors, which produce electrical signals in response to the received beams of light. The electrical signals are related to the displacement information being measured.
    Type: Application
    Filed: February 23, 2010
    Publication date: August 26, 2010
    Inventor: Christopher C. Chang