We developed a new simulation method for designing the luminescence profiles of phophor-based white light-emitting diodes (LEDs). By combining the rate equations for absorption/emission processes by phosphors with a differential equation for spatial distribution of light intensity, we take into account the cascade process of phosphor emission due to the reabsorption of photons. We found that our model is suitable for a systematic design method of white light sources with multicolor phosphor blends.
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Ishida et al. (2008) studied this question.
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