Patents by Inventor Lifford McLauchlan

Lifford McLauchlan 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).

  • Closed loop laser control
    Patent number: 8249120
    Abstract: The radiance of a laser is a function of drive current. The radiance is also a function of other factors, such as age and temperature. A laser projection device adjusts laser drive parameters using a gradient descent operation. The device parameters may be adjusted iteratively and periodically. The period may be shorter or longer than a scan line in a video image.
    Type: Grant
    Filed: March 14, 2012
    Date of Patent: August 21, 2012
    Assignee: Microvision, Inc.
    Inventors: Margaret K. Brown, Joel D. Hopkins, Jenchao J. Lin, Lifford McLauchlan
  • Closed Loop Laser Control
    Publication number: 20120176549
    Abstract: The radiance of a laser is a function of drive current. The radiance is also a function of other factors, such as age and temperature. A laser projection device adjusts laser drive parameters using a gradient descent operation. The device parameters may be adjusted iteratively and periodically. The period may be shorter or longer than a scan line in a video image.
    Type: Application
    Filed: March 14, 2012
    Publication date: July 12, 2012
    Applicant: MICROVISION, INC.
    Inventors: Margaret K. Brown, Joel D. Hopkins, Jenchao J. Lin, Lifford McLauchlan
  • Scanning mirror control
    Patent number: 7952783
    Abstract: A scanning beam projection system includes a scanning mirror having a fast-scan axis and a slow-scan axis. Movement on the slow-scan axis is controlled by a slow-scan scanning mirror control system. The control system receives position information describing angular displacement of the mirror. An outer loop of the control system operates in the frequency domain and determines harmonic drive coefficients for a scanning mirror drive signal. An inner loop of the control system operates in the time domain and compensates for a scanning mirror resonant vibration mode at a frequency within the frequency band occupied by the harmonic drive coefficients.
    Type: Grant
    Filed: September 22, 2008
    Date of Patent: May 31, 2011
    Assignee: Microvision, Inc.
    Inventors: Steve Holmes, Clint Charles Rollins, Margaret K. Brown, Michael L. Schaaf, Bruce C. Rothaar, Robert J. Jackson, Lifford McLauchlan, Mehrube Mehrubeoglu, Gregory Schneider
  • Closed Loop Laser Control
    Publication number: 20100156863
    Abstract: The radiance of a laser is a function of drive current. The radiance is also a function of other factors, such as age and temperature. A laser projection device adjusts laser drive parameters using a gradient descent operation. The device parameters may be adjusted iteratively and periodically. The period may be shorter or longer than a scan line in a video image.
    Type: Application
    Filed: December 23, 2008
    Publication date: June 24, 2010
    Applicant: Microvision, Inc.
    Inventors: Margaret K. Brown, Joel D. Hopkins, Jenchao J. Lin, Lifford McLauchlan
  • Scanning Mirror Control
    Publication number: 20100073748
    Abstract: A scanning beam projection system includes a scanning mirror having a fast-scan axis and a slow-scan axis. Movement on the slow-scan axis is controlled by a slow-scan scanning mirror control system. The control system receives position information describing angular displacement of the mirror. An outer loop of the control system operates in the frequency domain and determines harmonic drive coefficients for a scanning mirror drive signal. An inner loop of the control system operates in the time domain and compensates for a scanning mirror resonant vibration mode at a frequency within the frequency band occupied by the harmonic drive coefficients.
    Type: Application
    Filed: September 22, 2008
    Publication date: March 25, 2010
    Applicant: MICROVISION, INC.
    Inventors: Steve Holmes, Clint Charles Rollins, Margaret K. Brown, Michael L. Schaaf, Bruce C. Rothaar, Robert J. Jackson, Lifford McLauchlan, Mehrube Mehrubeoglu, Gregory Schneider