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:
Dec. 15, 2020
Filed:
Sep. 18, 2018
Nidec Corporation, Kyoto, JP;
Nidec Seimitsu Corporation, Ueda, JP;
Tetsufumi Hayashi, Ueda, JP;
NIDEC CORPORATION, Kyoto, JP;
NIDEC SEIMITSU CORPORATION, Nagano, JP;
Abstract
A vibration system includes a linear vibration motor, and a controller that controls a drive current waveform of the vibration motor. The drive current waveform includes consecutively arranged large unit waves having the same waveforms side by side on a time axis. Each large unit wave includes a first region having a waveform with a smaller amplitude in one period, which is a width of the large unit wave on the time axis, and a second region having a waveform with a larger amplitude than the amplitude in the first region. The first region and the second region alternatively appear on the time axis.