Journal of the Korean Institute of Illuminating and Electrical Installation Engineers (조명전기설비학회논문지)

The Korean Institute of IIIuminating and Electrical Installation Engineers (한국조명전기설비학회)
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Digital Light Color Control System of LED Lamp using Inverse Tri-Stimulus Algorithm

역 삼자극치 알고리즘을 이용한 LED램프 디지털 광색제어시스템

  • 강신호 (숭실대학교 대학원 전기공학과) ;
  • 이정민 (숭실대학교 대학원 전기공학과) ;
  • 염정덕 (숭실대학교 전기공학부)
  • Received : 2010.08.10
  • Accepted : 2010.10.30
  • Published : 2011.01.31
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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.

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References

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