The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 31, 2011
Filed:
Sep. 22, 2008
Steve Holmes, Sammamish, WA (US);
Clint Charles Rollins, Poulsbo, WA (US);
Margaret K. Brown, Seattle, WA (US);
Michael L. Schaaf, Bainbridge Island, WA (US);
Bruce C. Rothaar, Woodinville, WA (US);
Robert J. Jackson, Monroe, WA (US);
Lifford Mclauchlan, Corpus Christi, TX (US);
Mehrube Mehrubeoglu, Corpus Christi, TX (US);
Gregory Schneider, Occidental, CA (US);
Steve Holmes, Sammamish, WA (US);
Clint Charles Rollins, Poulsbo, WA (US);
Margaret K. Brown, Seattle, WA (US);
Michael L. Schaaf, Bainbridge Island, WA (US);
Bruce C. Rothaar, Woodinville, WA (US);
Robert J. Jackson, Monroe, WA (US);
Lifford McLauchlan, Corpus Christi, TX (US);
Mehrube Mehrubeoglu, Corpus Christi, TX (US);
Gregory Schneider, Occidental, CA (US);
Microvision, Inc., Redmond, WA (US);
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.