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:
Jul. 01, 2014
Filed:
Jun. 10, 2011
Qifei Tu, Shanghai, CN;
Wa-hing Leung, Hong Kong, CN;
Qifei Tu, Shanghai, CN;
Wa-Hing Leung, Hong Kong, CN;
Huizhou Light Engine Ltd, Huizhou, CN;
Abstract
A lighting apparatus includes: first, second and third groups of solid state light emitters; a first group of lumiphors; at least first, second and third power lines, the first, second and third group of solid state light emitters each being electrically coupled to at least one of the first, second and third power lines. A current controller controls the relative flux ratios of the first, second and third groups, the controller being programmed to, in response to receipt of a command, retrieve a set of data from a look-up table that contains information of the required flux output of each group of LEDs and generate pulse width modulation (PWM) signals to control current supplied to each group to alter the flux output of each group in order to achieve a desired CCT and total flux output.