无源驱动白光LED照明系统通过实现电流动态调制特性，使系统具有效率高、寿命长等优势，该系统有望引领白光LED照明的新发展趋势。无源驱动白光LED照明系统动态纹波电流调制特性、余辉荧光粉的激发光谱动态响应特性、瞬态混合光调制特性之间存在复杂的相互交叉问题，然而目前缺少理论揭示上述变化规律。我们前期已揭示在双脉冲驱动模式下白光LED照明系统动态颜色变化规律，因此本项目提出无源驱动白光LED照明系统动态能量传递机理和瞬态混合光调制特性的研究目标是可行的。本研究拟在明确陷阱中心、发光中心与发光性能关系的基础上，证明掺杂离子之间的二次激发过程以及发光离子之间的光子传递，将动态改变能量传递路径，并通过余辉响应时间谱和动态纹波电流调制特性之间的内在联系规律，对蓝光LED芯片发射光谱和余辉荧光粉激发光谱产生混合光动态变化规律开展深入研究。这将有助于开辟无源驱动白光LED照明系统应用的新途径。

A white LED system with passive driver is proposed that dynamic current modulation is allowed in the output properties. Consequently, passive components can be used to enable high efficiency and long lifetime of the overall system. It will open a new development trend to white LED lighting. There are complex interactions of the system among dynamic modulation properties of ripple current, dynamic response characteristics of excitation spectrum for afterglow phosphor, transient modulation modeling of mixture light. However, the above issues lack the necessary theory for clarification the superiority. We have revealed the dynamic color theory for the white LED system with double-pulse operation. Therefore, it is feasibility that the project proposes the research target for dynamic energy transfer and transient modulation properties for the white LED system with passive driver. The project will confirm the linking among trapping centers, luminescence centers, and luminescent properties. It should prove that second excitation process among doped ions and photon transfer among luminescent ions can cause the dynamic change in energy flow path. The mixture light consists of the emission spectrum of blue LED chip and excitation spectrum of afterglow phosphor. The dynamic variation mechanism of the mixture light is found to be result of the complex interactions between response time spectrum of afterglow and dynamic modulation properties of ripple current. The proposed idea opens a new research opportunity to the white LED system with passive driver.