双通道LED的单占空比调光调色方法

Method for Dual Channel LED Dimming with Single Duty Cycle

基于双通道LED调光调色的理论,建立了单占空比与混合光度量和色度量的映射关系,比较了双占空比与单占空比确定的色温与光通量的可行域,给出了单占空比与相关色温的关系曲线。应用单占空比调光调色,光源相关色温随着冷色温LED占空比的增大而增大。单占空比调光调色方法能在连续调节色温的同时保持光通量不变,方便了照明调节。

Based on the theory of dual-channel LED dimming, the mapping relationship between single duty cycle, light metric and color metric was established to help application. And the feasible range of color temperature and luminous flux determined separately by dual duty cycle and single duty cycle was compared;the relationship between the single duty cycle and the CCT (correlated color temperature) was given. Dimming with single duty cycle, the CCT increased as the duty cycle of the cold LED increased. Single duty cycle dimming can adjust the color temperature continuously when the luminous flux is constant, it is convenient for lighting regulation.