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:
Dec. 29, 2009
Filed:
Nov. 30, 2005
Danny A. Grant, Montreal, CA;
Juan Manuel Cruz Hernandez, Montreal, CA;
Pedro Gregorio, Verdun, CA;
Robert A. Lacroix, St. Lambert, CA;
Patrice Favreau, Mascouche, CA;
Danny A. Grant, Montreal, CA;
Juan Manuel Cruz Hernandez, Montreal, CA;
Pedro Gregorio, Verdun, CA;
Robert A. Lacroix, St. Lambert, CA;
Patrice Favreau, Mascouche, CA;
Immersion Corporation, San Jose, CA (US);
Abstract
Systems and methods for controlling a resonant device are described. One described method for braking an actuator includes generating a first actuator signal configured to drive the actuator, the first actuator signal having a first frequency approximately resonant to the actuator, and transmitting the first actuator signal to the actuator. The method also includes generating a second actuator signal, having a second frequency approximately 180 degrees out of phase to the first frequency, the second actuator signal configured to cause a braking force on the actuator, and transmitting the second actuator signal to the actuator.