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. 31, 2024
Filed:
May. 29, 2020
Lg Innotek Co., Ltd., Seoul, KR;
LG INNOTEK CO., LTD., Seoul, KR;
Abstract
A mask, according to an embodiment, comprises: a first wiring disposed on a first base layer; a piezoelectric element disposed on the first wiring; a second wiring disposed on the piezoelectric element; a second base layer disposed on the second wiring; a protective layer disposed between the first and second base layers and surrounding the first wire, the second wire, and the piezoelectric element; and a control unit which controls a driving frequency of the piezoelectric element. The control unit controls the driving frequency of the piezoelectric element in a frequency band defined as a first range, and the temperature of the piezoelectric element changes by means of the control of the driving frequency of the control unit.