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:
Oct. 19, 2021
Filed:
Nov. 05, 2020
Hyundai Motor Company, Seoul, KR;
Kia Motors Corporation, Seoul, KR;
Yonghwan Hwang, Hwaseong-si, KR;
Hyundai Motor Company, Seoul, KR;
Kia Motors Corporation, Seoul, KR;
Abstract
A broadband speaker includes: a first vibration plate configured to operate in a high frequency band, a second vibration plate disposed coaxially outside the first vibration plate, a first voice coil connected to the first vibration plate to vibrate the first vibration plate, a second voice coil disposed coaxially outside the first voice coil and connected to the second vibration plate, a magnet assembly configured to form a magnetic field, an amplifier configured to apply a first output signal of a high frequency band to the first voice coil and a second output signal of a frequency band lower than that of the first output signal to the second voice coil, and a controller configured to control the amplifier to apply a signal for suppressing vibration of the second vibration plate to the second voice coil when the first output signal is applied to the first voice coil.