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. 27, 2015
Filed:
Mar. 13, 2013
Stanley Electric Co., Ltd., Meguro-ku, Tokyo, JP;
Takanori Aimono, Tokyo, JP;
Yoshiaki Yasuda, Tokyo, JP;
Stanley Electric Co., Ltd., Tokyo, JP;
Abstract
An optical deflector is provided which can effectively suppress occurrence of a ringing phenomenon when a piezoelectric actuator is driven with a voltage signal of a sawtooth waveform. An optical deflector Aincludes a control circuitthat detects a mechanical natural frequency relevant to swinging about a second axis Xof a movable part. The control circuitapplies a voltage signal of a sawtooth waveform from which the natural frequency and a harmonic component thereof are removed to outside piezoelectric actuatorsand. The control circuitremoves a frequency component, which is equal to or greater than a second threshold value Gwithin a predetermined frequency range out of frequency components of a voltage signal output from a detecting piezoelectric body, from a drive voltage.