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. 04, 2019
Filed:
Nov. 28, 2017
Hyundai Motor Company, Seoul, KR;
Kia Motors Corporation, Seoul, KR;
Ilseon Yoo, Suwon-si, KR;
HYUNDAI MOTOR COMPANY, Seoul, KR;
KIA MOTORS CORPORATION, Seoul, KR;
Abstract
A microphone includes: a vibration electrode disposed in an upper portion of a substrate which has an acoustic hole; a fixed electrode separated from the upper portion of the vibration electrode by a reference distance and having an insulation membrane on each of an upper surface and a lower surface of the fixed electrode; and a piezoelectric electrode having a plurality of beams disposed in a radial direction outwards from a center of an upper portion of the fixed electrode and uniformly maintaining a space between the vibration electrode and the fixed electrode by bending the fixed electrode in one direction according to an input voltage.