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:
Jan. 21, 2020
Filed:
Oct. 23, 2017
North Inc., Kitchener, CA;
North Inc., Kitchener, ON, CA;
Abstract
According to the present invention there is provided a method of controlling the position of a MEMS mirror in a MEMS device, wherein the MEMS device comprises, a MEMS mirror, a magnet which provides a magnetic field (B), an actuating means which operatively cooperates with the MEMS mirror so that it can apply a force to the MEMS mirror which can tilt the MEMS mirror about at least one rotational axis when the actuating means is provided with a drive signal, wherein the magnitude force applied by the actuating means to the MEMS mirror is dependent on the amplitude of the drive signal, and a detection coil which is mounted on the MEMS mirror, the method comprising the steps of, detecting a change in the resistance (R) of the detection coil so as to detect a change in temperature of the MEMS mirror; determining the drive signal amplitude required to maintain the MEMS mirror at a predefined angular position (Θ); providing the actuating means with a drive signal which has an amplitude which is equal to the determined drive signal amplitude.