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:
Jan. 29, 2002
Filed:
Jan. 17, 2001
Elizabeth B. Taylor, Atlanta, GA (US);
Holley McBroom, Atlanta, GA (US);
Grant H. Lloyd, Lawrenceville, GA (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
The present invention includes a means for charging the battery of an electronic device by converting acoustic energy to electrical current. In one preferred embodiment, the protective layer of a liquid crystal display screen has a magnetic material disposed thereon. The housing of the liquid crystal display includes a corresponding coil of wire. As the protective layer has freedom of motion given by the liquid crystal panel, when acoustic energy is incident upon the protective layer, the protective layer moves, causing the magnetic material to generate a changing magnetic field in the coil. In an alternate embodiment, the protective layer is connected to piezoelectric transducers. When acoustic energy is incident upon the protective layer, the piezoelectric transducers are actuated. In another embodiment, the electronic device comprises an input for receiving concentrated acoustic energy from various sources including loudspeakers and acoustic waveguides.