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:
Sep. 08, 1998
Filed:
Aug. 11, 1995
Chih-Ming Yang, Hsinchu, TW;
Jyi-Tyan Yeh, Hsinchu, TW;
Industrial Technology Research Institute, Hsinchu, TW;
Abstract
A thin, high-fidelity piezoelectric loudspeaker is disclosed which comprises: (a) first and second metal discs that are spaced apart; (b) at least one damping disc sandwiched between the first and second metal discs; (c) first piezoelectric disc affixed to the first metal disc on the opposite side of the damping disc; and (d) second piezoelectric disc affixed to the second metal disc on the opposite of the damping disc. The metal discs and the piezoelectric discs are electrically connected, respectively, via varnished wires. These improved piezoelectric loudspeakers can be most advantageously used in portable electronic devices such as notebook personal computers, electronic dictionaries, personal digital assistants, electronic Rolodexes.RTM., etc, where space, especially thickness, is often at a premium and high-fidelity, miniature-sized speakers are highly desired.