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:
Apr. 28, 2009
Filed:
Jan. 16, 2007
Takashi Katsumata, Kariya, JP;
Takeshi Ito, Okazaki, JP;
Hirofumi Higuchi, Okazaki, JP;
Mutsuhito Ogino, Okazaki, JP;
Tetsuya Morishima, Ichinomiya, JP;
Takashi Katsumata, Kariya, JP;
Takeshi Ito, Okazaki, JP;
Hirofumi Higuchi, Okazaki, JP;
Mutsuhito Ogino, Okazaki, JP;
Tetsuya Morishima, Ichinomiya, JP;
DENSO CORPORATION, Kariya, JP;
Nippon Soken, Inc., Nishio, JP;
Abstract
An angular velocity sensor includes first and second vibrators having a movable portion with driving and detecting purpose movable electrodes and a fixed portion with first and second side driving and detecting purpose fixed electrodes. The driving voltages applied to the first side driving purpose fixed electrode in the first vibrator is a first driving voltage including direct and alternating voltages. The driving voltage applied to the second side driving purpose fixed electrode in the first vibrator is a second driving voltage including direct and alternating voltages. At least one of the direct voltages, one of the alternating voltages, or one of duty ratios of the first and second driving voltages is controlled so that the first vibrator vibrates opposite to the second vibrator.