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:
Nov. 24, 2020
Filed:
Dec. 13, 2018
Hitachi, Ltd., Tokyo, JP;
Takahiro Matsuda, Tokyo, JP;
Yoshiho Seo, Tokyo, JP;
Satoshi Ouchi, Tokyo, JP;
Shinsuke Onoe, Tokyo, JP;
HITACHI, LTD., Tokyo, JP;
Abstract
In an optical scanner, a vibration portionincludes first and third elementsandthat vibrate a light guide pathin a direction substantially perpendicular to an optical axis direction, and second and fourth elementsandthat vibrate the light guide path in a direction substantially perpendicular to a vibration direction thereof. A driving signal is applied to each of electrodesto, each of which corresponds to one electrode of each of the first to fourth elements, and the other electrodeis used as a common electrode having a floating potential. A driving signal generatorgenerates a driving signal such that a median value of driving signals Vand Vapplied to the first and third elements and a median value of driving signals Vand Vapplied to the second and fourth elements correspond to substantially the same value.