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. 27, 2007
Filed:
Aug. 24, 2004
Hiroshi Tanaka, Yokohama, JP;
Masanori Yachi, Yokohama, JP;
Takashi Kato, Sannohe, JP;
Hiroshi Ishikawa, Kawasaki, JP;
Hiroshi Tanaka, Yokohama, JP;
Masanori Yachi, Yokohama, JP;
Takashi Kato, Sannohe, JP;
Hiroshi Ishikawa, Kawasaki, JP;
Fujitsu Media Devices Limited, Yokohama, JP;
Abstract
An acceleration sensor includes a weight and a vibrator that supports the weight at its center of gravity. When acceleration is applied to the weight, stress equivalent to the applied acceleration is generated in the vibrator. As the vibrator is arranged to support the weight at its center of gravity, a characteristic relationship is observed between the acceleration, such as angular acceleration or translational acceleration, and the size of electric charges and the polarity. By taking advantage of this relationship, different types of acceleration can be easily detected.