| Summary: | 碩士 === 國立中央大學 === 光電科學與工程學系 === 102 === In this thesis, we build up the phosphor optical model with multiple pumping wavelengths and thermal effect. This model can predict the shift of the color coordinate at different temperatures. We make the thermal prediction by changing the absorption coefficients and conversion coefficients. Accordingly, we have to find the relationship of absorption coefficient between different wavelengths first by defining the ability of absorption to link. Secondly, the conversion coefficients also need to find the relationship between different wavelengths. Hence, we use the ability of excitation to calculate the conversion coefficients between different wavelengths. However, with the thermal effect in turning on LEDs, the output flux decay of the yellow light must be added. Finally, we can change the absorption coefficients and conversion coefficients to predict the shift of the color coordinate. Last but not the least, we will compare the experiment with the simulation to verify the method.
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