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:
Feb. 13, 2018
Filed:
Sep. 05, 2014
Panasonic Corporation, Osaka, JP;
Abstract
A lighting device includes a power converter, a second switching element and a microcomputer. The power converter is configured to convert DC power that is received from a power supply, and supply an output obtained by the conversion to a load. The second switching element is configured to short-circuit at least one LED of a plurality of LEDs, as part of the load. The microcomputer is configured to control the power converter, and control switching on/off of the second switching element. The microcomputer is configured to reduce an output current of the power converter, in a case where a power supply voltage of the battery is a reference voltage or less. A reduction amount of the output current in an on-state of the second switching element is lower than the reduction amount of the output current in an off-state of the second switching element.