Invention Grant
- Patent Title: Drive apparatus, electronic device, drive control program, and drive signal generating method
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Application No.: US15139465Application Date: 2016-04-27
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Publication No.: US09684377B2Publication Date: 2017-06-20
- Inventor: Kiyoshi Taninaka , Yasuhiro Endo , Akihiko Yabuki
- Applicant: FUJITSU LIMITED
- Applicant Address: JP Kawasaki
- Assignee: FUJITSU LIMITED
- Current Assignee: FUJITSU LIMITED
- Current Assignee Address: JP Kawasaki
- Agency: Fujitsu Patent Center
- Main IPC: G08B21/00
- IPC: G08B21/00 ; G08B19/00 ; H04Q1/30 ; G08B5/22 ; H04B3/36 ; G08B23/00 ; G09B21/00 ; H04M11/00 ; H04M3/00 ; G06F3/01 ; B06B1/06 ; G06F3/041 ; B06B1/04 ; H02P25/032

Abstract:
A drive apparatus includes a memory to store waveform data representing a sinusoidal drive signal satisfying a frequency f1=(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 f0; 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 f1=(m/n)×f2, to vibrate the vibration-generating device m times if m≠n, or ((m/2)×r) times.
Public/Granted literature
- US20160239089A1 DRIVE APPARATUS, ELECTRONIC DEVICE, DRIVE CONTROL PROGRAM, AND DRIVE SIGNAL GENERATING METHOD Public/Granted day:2016-08-18
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