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:
Jun. 20, 2017
Filed:
Apr. 27, 2016
Fujitsu Limited, Kawasaki-shi, Kanagawa, JP;
FUJITSU LIMITED, Kawasaki, JP;
Abstract
A drive apparatus includes a memory to store waveform data representing a sinusoidal drive signal satisfying a frequency f=(m/n)×q(t) (m and n: natural numbers, m≠n), to vibrate a vibration-generating device m times, where q(t) is a time characteristic of a resonance frequency of the vibration-generating device, or ((m/2)×r) times (r: natural number≠0, m and n: positive odd, m≠n), the vibration-generating device having the resonance frequency varying depending on an acceleration amplitude in a range between first and second resonance frequencies including the rated value f; and a drive-processor to output the drive signal to the vibration-generating device. The q(t) is obtained when driving the vibration-generating device by a sinusoidal drive signal satisfying f=(m/n)×f, to vibrate the vibration-generating device m times if m≠n, or ((m/2)×r) times.