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. 05, 2017
Filed:
May. 27, 2014
The University of Hong Kong, Hong Kong, CN;
Other;
Abstract
A correlated color temperature control system () for a LED lighting system () having at least two LED sources () with different correlated color temperatures. The LED lighting system () has a combined correlated color temperature resulting from the combination of the different correlated color temperatures of the at least two LED sources (), and a combined luminous flux resulting from the combination of the luminous fluxes of the at least two LED sources (), with each LED source being supplied with a supply current. The correlated color temperature control system () comprises a controller () to independently control one or both of the duty cycle and amplitude of each supply current, the duty cycle or amplitude of each supply current being varied by the controller in a non-linear relationship with the duty cycle or amplitude of at least one other of the supply currents, to generate a desired combined correlated color temperature for the LED lighting system () at a desired combined luminous flux for the LED lighting system (). An associated method is also provided.