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http://dx.doi.org/10.5207/JIEIE.2011.25.1.001

Digital Light Color Control System of LED Lamp using Inverse Tri-Stimulus Algorithm  

Kang, Shin-Ho (숭실대학교 대학원 전기공학과)
Lee, Jeong-Min (숭실대학교 대학원 전기공학과)
Ryeom, Jeong-Duk (숭실대학교 전기공학부)
Publication Information
Journal of the Korean Institute of Illuminating and Electrical Installation Engineers / v.25, no.1, 2011 , pp. 1-8 More about this Journal
Abstract
In this paper, the method to calculate chromaticity coordinate from spectral power distribution of LED is presented. Also, inverse tri-stimulus algorithm to find mixed luminance of red, green, blue LED from targeted luminance and chromaticity coordinate is proposed. Besides, digital light color control system of LED lamp applied this algorithm has been developed. In experiments, each chromaticity coordinate of red, green, blue LED calculated from this algorithm has relative percentage error of few % to measured values. Digital code is drawn from inverse tri-stimulus algorithm, and measured values of luminance and chromaticity coordinate of LED lamp digitally controlled by this code also have relative percentage error within a few % to targeted luminance and chromaticity coordinate.
Keywords
LED Drive Method; RGB Color; Tri-Stimulus Values; Chromaticity Coordinates; Digital Control;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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