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. 31, 2010
Filed:
Apr. 25, 2008
Yukio Sakashita, Kanagawa-ken, JP;
Tsutomu Sasaki, Kanagawa-ken, JP;
Yuuichi Okamoto, Minamiashigara, JP;
Munenori Nakai, Kanagawa-ken, JP;
Yukio Sakashita, Kanagawa-ken, JP;
Tsutomu Sasaki, Kanagawa-ken, JP;
Yuuichi Okamoto, Minamiashigara, JP;
Munenori Nakai, Kanagawa-ken, JP;
Fujifilm Corporation, Tokyo, JP;
Abstract
A piezoelectric body contains a ferroelectric substance phase having characteristics such that, in cases where an applied electric field is increased from the time free from electric field application, phase transition of the ferroelectric substance phase to a ferroelectric substance phase of a different crystal system occurs at least two times. The piezoelectric body should preferably be actuated under conditions such that a minimum applied electric field Emin and a maximum applied electric field Emax satisfy Formula (1):Emin<E1<Emax  (1)wherein the electric field Erepresents the electric field at which the first phase transition of the ferroelectric substance phase begins.