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. 14, 2017
Filed:
May. 13, 2016
Hughey & Phillips, Llc, Urbana, OH (US);
Richard C. Mula, Westlake Village, CA (US);
Steven V. Ricca, Upper Arlington, OH (US);
HUGHEY & PHILLIPS, LLC, Urbana, OH (US);
Abstract
A color-controlled light source includes a plurality of light emitting diodes, the light emitting diodes being configured to emit different colors of light, intensity of the light emitted by the light emitting diodes being selectably adjustable. A sensor receives the light emitted by the light emitting diodes and converts the received light to electrical feedback signals corresponding to the emitted light. A processor generates an electrical reference signal. An amplifier receives the reference signal and the feedback signal, compares the feedback signal and the reference signal, and generates an error signal corresponding to a difference between the feedback signal and the reference signal. A current control receives the error signal and adjusts the intensity of at least one light emitting diode to cancel the error signal. A composite color emitted by the plurality of light emitting diodes has a predetermined, closed-loop controlled chromaticity.