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. 26, 2008
Filed:
Jul. 26, 2005
Seiichiro Oku, Kanagawa, JP;
Seiichiro Oku, Kanagawa, JP;
Fujifilm Corporation, Tokyo, JP;
Abstract
The drive circuit drives a plurality of piezoelectric elements connected in a matrix connection, each of the piezoelectric elements having a first electrode and a second electrode, and the drive circuit comprises: a drive signal generating device which generates a drive signal with voltage of a single polarity to be applied to the piezoelectric elements; a drive controlling device which controls a timing for applying the drive signal to each of the piezoelectric elements; and a plurality of switching devices which apply the drive signal to the piezoelectric elements according to control of the drive controlling device, a number of the plurality of switching devices being smaller than a number of the plurality of piezoelectric elements, wherein the drive controlling device sequentially applies the drive signal with voltage of the single polarity to the first electrode and the second electrode in succession.