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:
Jul. 10, 2018
Filed:
May. 17, 2016
Applicant:
Dai-ichi Seiko Co., Ltd., Kyoto-shi, Kyoto, JP;
Inventors:
Assignee:
DAI-ICHI SEIKO CO., LTD., Kyoto, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04R 1/10 (2006.01); H04R 17/00 (2006.01); H04R 3/12 (2006.01); H04R 1/24 (2006.01);
U.S. Cl.
CPC ...
H04R 1/1016 (2013.01); H04R 1/24 (2013.01); H04R 3/12 (2013.01); H04R 17/00 (2013.01);
Abstract
A digital speaker () is provided that is equipped with a piezoelectric element () including n electrodes () spaced apart from one another. Sound pressure is adjusted according to the surface area of the electrodes (), and all the electrodes () can be driven by the same voltage. A speaker system is provided that uses the digital speaker () as a tweeter (), or as all the speakers including a woofer (). By this speaker system, earphones () are provided that are miniaturized and have high sound quality.