能馈式LED阵列驱动电路的效率控制优化及调光调色策略

Energy-recycle interface circuit for LED matrix driving under maximum-efficiency operation point tracking control with brightness and color control strategy

为了在全负载范围下高效率地驱动规则及不规则LED阵列,基于能馈式LED阵列驱动接口电路提出一种可最高效率点跟踪的控制策略,使能馈式LED阵列驱动接口电路在负载发生变化的情况下仍可工作在最高效率点。在负载组合已知的前提下基于RGBLED负载切换可实现调光调色,建立了反向传播(BP)神经网络负载控制的调光调色模型。制作了24V输入、3通道输出、开关频率为100kHz的能馈式RGBLED通道电路样机并搭建了相应的取色平台。实验结果表明,最高效率点跟踪的能馈式LED阵列驱动接口电路可利用神经网络负载控制模型实现有限空间下的调光调色。

In order to efficiently drive the regular and irregular LED arrays under the full load range,a control strategy based on the energy recycle LED matrix driving circuit that can track the maximum-efficiency operation point is proposed to enable the driving circuit work at the maximum-efficiency point at the load under changing circumstances.The brightness and color control can be achieved based on RGBLED load switching,and a load-controlled brightness and color control model of back propagation(BP)neural network is established.A RGBLED channle circuit prototype with 24V input,3 channel output,and a switching frequency of 100kHz is made and the corresponding color extraction platform is built.The experimental results show that the energy-recycle interface circuit for LED matrix driving under maximum-efficiency operation point tracking control can realize the brightness and color control in limited space by using the neural network load control model.