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:
Jan. 18, 2011
Filed:
Oct. 30, 2006
Noboru Toyozawa, Kanagawa, JP;
Yoshiharu Nakajima, Kanagawa, JP;
Noboru Toyozawa, Kanagawa, JP;
Yoshiharu Nakajima, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
A power supply generating circuit, a display apparatus incorporating the same, and a portable terminal device using the display apparatus as an output display unit are provided. In a DC-DC converter having a charge pump circuit (), a voltage dividing circuit (), and a regulation circuit (), p-channel MOS transistors (QpQpQp) are turned on/off based on an enable pulse enb to make the voltage dividing circuit () and a comparator () active only for a period of regulation time and inactive otherwise. This can cause a current to flow in voltage-divider resistors (RR) and the comparator () only for a certain period of time required for the regulation operation, thus reducing the power consumption loss caused by a constant current flow in the voltage-divider resistors (RR) and the comparator ().