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. 05, 2016
Filed:
Mar. 13, 2015
Hisahiro Kamata, Kanagawa, JP;
Hisahiro Kamata, Kanagawa, JP;
Ricoh Company, Ltd., Tokyo, JP;
Abstract
An inverter device includes a switching device which performs on-off switching of an input voltage, a step-up transformer which applies an excitation current to its winding during a switching-device-on period and outputs an output voltage during a switching-device-off period, an input-voltage detector which detects the input voltage and output an input-voltage detection signal, an output voltage detector which detects the output voltage and output an output-voltage detection signal, an output-produced-period detector which detects a period when the output voltage is produced based on the output-voltage detection signal, a comparator which detects a period when the output-voltage detection signal exceeds the input-voltage detection signal and output information indicating the output-high period, and a shifting unit which shifts the information indicating the output-high period to a next period when absence of the output produced period is detected. The control unit adjusts the switching-device-on period based on information indicating the shifted output-high period.