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. 01, 2019
Filed:
Mar. 14, 2018
Brother Kogyo Kabushiki Kaisha, Nagoya-shi, Aichi-ken, JP;
Hideki Arimoto, Nagoya, JP;
BROTHER KOGYO KABUSHIKI KAISHA, Nagoya-Shi, Aichi-Ken, JP;
Abstract
A switching power supply includes: a main power supply; a rectifying-and-smoothing circuit configured to rectify and smooth an AC voltage; a transformer connected to the rectifying-and-smoothing circuit; a first switching element connected to a primary coil of the transformer; a switch controller configured to perform switching-control the first switching element to oscillate the primary side of the transformer, thereby inducing a voltage to a secondary side of the transformer; and a second switching element connected in series with the smoothing capacitor of the rectifying-and-smoothing circuit and configured to switch between on-and-off states of energization by a control signal that is to be output from the switch controller, wherein the switch controller is configured to limit an on-time period of the second switching element by the control signal during an output stop mode in which the oscillation of the transformer is to be stopped.