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:
Jun. 23, 2009
Filed:
Oct. 23, 2007
Ichiro Masui, Chiba, JP;
Katsunori Ogawa, Kanagawa, JP;
Kenichi Sakai, Tokyo, JP;
Sony Corporation, Tokyo, JP;
Abstract
The present invention relates to an electronic apparatus and a power supply controlling method with which input power source is switched efficiently in accordance with a load of a device. A power controller, upon detecting a USB connection, monitors power consumption of a CPUbased on the operation status of the CPU, and controls a switchin accordance with a current supplied from a USB cable. When the current is less than or equal to 500 mA, the switchis switched to a terminal a. Before configuration, when the current is less than or equal to 100 mA, the switchis switched to the terminal a, and then a regulatoris controlled so that the current will not exceed 100 mA. In USB suspend, the switchis switched to a terminal b, and a regulatorstops output to a backup battery. The present invention can be applied to a digital still camera supporting USB.