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. 22, 2015
Filed:
Feb. 20, 2013
Ntt Docomo, Inc., Chiyoda-ku, JP;
Renesas Electronics Corporation, Kawasaki-shi, JP;
Kumiko Yamaguchi, Tokyo, JP;
Tetsuhiro Tanno, Tokyo, JP;
Kunio Yoshikawa, Tokyo, JP;
Tomohiro Akiyama, Tokyo, JP;
Tetsuhiro Sasagawa, Tokyo, JP;
Kazuaki Gemma, Kanagawa, JP;
Satoshi Akita, Kanagawa, JP;
Norihisa Yamamoto, Kanagawa, JP;
NTT DOCOMO, INC., Chiyoda-ku, JP;
Renesas Electronics Corporation, Kawasaki-shi, JP;
Abstract
A portable terminal supplies power to a chip card therein with host power off. A power controller supplies power from a battery to a host, the chip card, and a CLF; a first switch opens/closes a power supply channel to the chip card, branching from a power supply channel from the power controller to the host; a second switch opens/closes a power supply channel to the chip card, branching from a power supply channel from the power controller to the CLF; a switch controller opens the first switch and closes the second switch if the CLF detects a contactless RF signal, if the host is off or if the portable terminal is in a low battery mode, and if the contactless RF signal conforms to the communication method of the chip card, and the switch controller closes the first switch and opens the second switch if the host is on.