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:
Aug. 16, 2011
Filed:
Mar. 30, 2010
Takeshi Shimizu, Chino, JP;
Daisuke Ishida, Fujimi, JP;
Takeshi Shimizu, Chino, JP;
Daisuke Ishida, Fujimi, JP;
Seiko Epson Corporation, , JP;
Abstract
A mirror device drive control apparatus adapted to perform drive control of a mirror device having a hysteresis characteristic, includes: a drive section adapted to drive the mirror device with a drive signal; a detection section adapted to detect a displacement of a movable section of the mirror device, and to generate and then output a detection signal corresponding to the detection; and a start-up processing section adapted to perform a start-up process of the mirror device, wherein the start-up processing section detects a frequency of an envelope included in abnormal vibration of the movable section as a beat frequency fb based on the detection signal of the detection section, obtains a predetermined frequency fbased on a frequency f of the drive signal of the mirror device with which the beat frequency is detected and the beat frequency fb, and drives the mirror device again with the drive signal having the frequency f