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:
Sep. 17, 2002
Filed:
Dec. 22, 2000
Koji Ikeda, Hyogo, JP;
Koji Matsuo, Fukuoka, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
In order to maximally improve the deformation characteristic of a piezoelectric actuator of an ink jet head so as to improve the printed image quality, the present invention newly provides expansion/contraction sections in the vicinity of a displacement section which is displaced in the thickness direction by the expansion/contraction in the planar direction of a piezoelectric layer in the piezoelectric actuator, wherein the expansion/contraction sections are expanded/contracted in the planar direction by the expansion/contraction of the piezoelectric layer in the planar direction, so that the displacement of the displacement section in the thickness direction is controlled by the expansion/contraction of the expansion/contraction section in the planar direction.