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:
Aug. 18, 2009
Filed:
Oct. 23, 2003
Ryota Odake, Tokyo, JP;
Junichi Ohsako, Tokyo, JP;
Hideo Kawabe, Saitama, JP;
Mitsunori Ueda, Tokyo, JP;
Ryota Odake, Tokyo, JP;
Junichi Ohsako, Tokyo, JP;
Hideo Kawabe, Saitama, JP;
Mitsunori Ueda, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
In a contactless IC card (), a rectification circuit () rectifies an electromagnetic wave received via an antenna () to provide a DC voltage, and an electric double-layer capacitor () quickly stores the power from the rectification circuit (). The electric double-layer capacitor () supplies the electric power to circuits such as a modem (), CPU (), memory (), controller IC (), driver IC (), etc. for operation, and rewrites information for display on a display device () using a cholesteric liquid crystal, ferroelectric liquid crystal or the like.