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:
Jul. 28, 2009
Filed:
Nov. 02, 2005
John R. Lewis, Bellevue, WA (US);
William Standing, Kirkland, WA (US);
Gary Mansouri, Bothell, WA (US);
Tze Siu, Seattle, WA (US);
Jari Honkanen, Monroe, WA (US);
John R. Lewis, Bellevue, WA (US);
William Standing, Kirkland, WA (US);
Gary Mansouri, Bothell, WA (US);
Tze Siu, Seattle, WA (US);
Jari Honkanen, Monroe, WA (US);
Microvision, Inc., Redmond, WA (US);
Abstract
A device for driving a plant such as a beam scanner includes a memory, drive-signal generator, and a calibrator. The memory stores data corresponding to the drive signal, and the generator generates the drive signal from the data and couples the drive signal to the plant. The calibrator measures a response of the plant to the drive signal, calculates a difference between the measured response and a corresponding target response, and reduces the difference by altering the drive signal. Such a device can force the output response of the driven plant to equal a target output response, or to be sufficiently close to the target response for a particular application, while the device is operating in an open-loop configuration. Furthermore, while operating in an open-loop configuration, such a device often has a greater stability margin and greater noise immunity than a comparable device that operates in a closed-loop configuration.