The Study of LED Pulse Current Drive and Luminous Efficacy
Wen Huaijiang
Abstract：This thesis demonstrates that the amplitude , duty ratio , frequency and waveform of pulse will affect LED luminous efficacy , through research and experiment on the relationship between pulse current drivers and luminous efficacy of white LEDs .The luminous efficacy of LED will be more strongly affected when pulse current is high peak with low duty ratio .LED has relatively higher luminous efficacy when the pulse frequency in the range of 200~2000Hz.LED luminous efficacy will be improved certainly when pulse is rated peak with low duty ratio .The smaller the pulse ripple factor , the higher the LED luminous efficacy is.Compared to triangular wave , sine wave , square wave of pulse waveform , pulse of the triangular wave will produce higher luminous efficacy .
Keywords：LEDpulse driveluminous efficacyduty ratio
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 74-79 )