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. 08, 2003
Filed:
Feb. 07, 2001
Masato Hashimoto, Toyota, JP;
Toyota Jidosha Kabushiki Kaisha, Toyota, JP;
Abstract
A physical quantity detector apparatus detects a physical quantity in accordance with the displacement of a vibrator. The apparatus includes: a comb-like fixed electrode having a plurality of electrode fingers; and a comb-like movable electrode being displaceable together with the vibrator and having a plurality of electrode fingers. A voltage is applied between the fixed electrode and the movable electrode. A distance D from a distal end surface of each electrode finger of the movable electrode to a basal portion of the fixed electrode facing the distal end surface of each electrode finger of the movable electrode, a distance D from a distal end surface of each electrode finger of the fixed electrode to a basal portion of the movable electrode facing the distal end surface of each electrode finger of the fixed electrode, a maximum displacement A of the movable electrode in the direction of the axis of each electrode finger, a width w of each electrode finger of the movable electrode and of each electrode finger of the fixed electrode, and a distance d between each electrode finger of the movable electrode and an adjacent electrode finger of the fixed electrode in a direction of the width are set so as to satisfy a relationship of 1/(5dw)>{1/(D −A) }+{1/(D −A) }.