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:
Feb. 13, 2018
Filed:
Dec. 19, 2013
Canon Kabushiki Kaisha, Tokyo, JP;
Toshihiro Ifuku, Yokohama, JP;
Tatsuo Furuta, Machida, JP;
Hiroshi Saito, Kawasaki, JP;
Makoto Kubota, Yokohama, JP;
Satoshi Fujita, Utsunomiya, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
The present invention provides a piezoelectric element that includes a piezoelectric material having first and second surfaces; a common electrode disposed on the first surface; and a plurality of drive phase electrodes, a detection phase electrode, and a non-drive phase electrode disposed on the second surface, the piezoelectric material being sandwiched between the common electrode and the electrodes on the second surface. An absolute value d() of a piezoelectric constant of the piezoelectric material () in portions sandwiched between the drive phase electrodes and the common electrode, an absolute value d() of a piezoelectric constant of the piezoelectric material () in a portion sandwiched between the detection phase electrode and the common electrode, and an absolute value d() of the piezoelectric material () in a portion sandwiched between the non-drive phase electrode and the common electrode satisfy d()<0.95d(), d()<0.95d(), and 0.9≦d()/d()≦1.1.