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:
Dec. 22, 2015
Filed:
May. 14, 2013
Elm Inc., Kagoshima, JP;
Takakazu Miyahara, Kagoshima, JP;
Hiroshi Kirihara, Kagoshima, JP;
Mitsuhiro Hashiguchi, Kagoshima, JP;
ELM INC., Kagoshima, JP;
Abstract
A time-division control circuit individually controls an effective voltage supplied to each lighting load by adjusting the periods during which switching circuits connected to N sets of lighting loads are kept on. A zero-cross signal having a value that changes at the zero-cross point of the AC voltage is generated. An oscillation signal is generated with a frequency equal to, or an integer multiple of the AC frequency. The phase difference between the zero-cross signal and the oscillation signal is measured and a common reference point that defines the timing for turning the switching circuits ON or OFF is determined on the basis of the measured phase difference. An ON/OFF signal for each switching circuit is transmitted at a timing for each of the N sets of switching circuits on the basis of the reference point and the effective voltage to be supplied to the lighting load.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile