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:
Nov. 24, 2015
Filed:
Mar. 26, 2013
Mitsubishi Chemical Corporation, Chiyoda-ku, JP;
Toru Takeda, Chiyoda-ku, JP;
MITSUBISHI CHEMICAL CORPORATION, Chiyoda-ku, JP;
Abstract
An LED lighting apparatus connected to a power source via two electric lines, includes first and second LEDs having different emission spectrum or chromaticity, a switching unit to monitor ON time length of power supplied from the two electric lines periodically to switch a control mode of the first and second LEDs between first and second modes as a condition that the ON time is not changed continues for more than a threshold value, a first control unit to determine, in the first mode, a total amount of average current to be supplied to the first LED and to the second LED depending on the ON time length of the electric power, and a second control unit to determine, in the second mode, a ratio of average currents to be supplied to the first LED and to the second LED depending on the ON time length.