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:
Jun. 12, 2001
Filed:
Nov. 04, 1998
Haruyuki Nakano, Sakai, JP;
Minolta Co., Ltd., Osaka, JP;
Abstract
The drive device has a detection circuit (,) to which drive signals are input from a drive circuit (,) that drives a piezoelectric linear actuator (,) and that detects the characteristic of the drive signals regarding a prescribed factor and outputs detected characteristic signals that indicate the characteristic, a characteristic sampling circuit (,) that outputs a standard characteristic signal that indicates the characteristic regarding the prescribed factor when the actuator (,) is in the normal state, and a comparison circuit (,) that outputs a control signal when the difference between the two signals exceeds an allowable range.
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