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:
Oct. 06, 2015
Filed:
Feb. 02, 2011
Takeshi Morita, Saitama, JP;
Ryuichi Yoshida, Sakai, JP;
Takeshi Morita, Saitama, JP;
Ryuichi Yoshida, Sakai, JP;
KONICA MINOLTA, INC., , JP;
Abstract
Disclosed is a drive devicewhich is adapted to move a driven member used on a speed difference between during extending and during contracting in a course of vibration of a vibrator. The vibrator, e.g., a piezoelectric element, is formed in a structure which has two resonance modes identical in terms of a vibration direction, and allows a ratio between resonance frequencies of the two resonance modes to become approximately 2. A drive signal to be given to the vibrator is configured to approximately conform to the two resonance modes. The drive devicehaving the above configuration makes it possible to generate pseudo-sawtooth displacement vibration multiplied by an amplitude amplification factor Q through resonance, thereby improving a movement speed, and allow a larger part of input energy to be used for mechanical vibration, thereby improving energy efficiency.