基于纹波特性的白光led器件动态及稳态光通量模型

Abstract

time LED measurement method is demonstrated in this paper, so as to analyze and develop dynamic light outputs in real time. The dynamic illuminance, percent flicker, and flicker index of LED sources can be calculated independently as a function of heatsink temperature, frequency, voltage amplitude, amplification factors, and electrical power. By using the proposed model, it is possible to convert the dynamic light output from LED sources into flicker indexes and percent flickers under different conditions. There is good agreement between measured and calculated optical and flicker results, even when measured at different heatsink temperatures and driver parameters. According to dynamic optical and flicker performance, the tool allows designers to optimize LED system designs. Therefore, researchers and engineers can determine dynamic illuminance and flicker index using the LED and driver datasheets instead of optical instruments.