Moolman M C, Koek W D, Urbach H P
VSL Thijsseweg 11, 2629 JA Delft, Netherlands.
Opt Express. 2009 Sep 28;17(20):17457-70. doi: 10.1364/OE.17.017457.
High power light-emitting diodes (HPLEDs) are frequently being operated in a pulsed manner. The research presented here focuses on the optical, electrical and thermal behaviour of a HPLED under pulse width modulation (PWM), and has the following twofold aim. Firstly, investigating the temperature dependence of the HPLED's efficiency, where it was found that the exact method of operation and the definition of calculation is crucial when making claims. Secondly, we propose a method to simulate the absolute emitted luminous flux of a current driven HPLED under PWM. This is done by making use of experimentally determined characteristic parameters of the HPLED. This has as advantage that no further physical measurements are needed to investigate the HPLEDs behavior under numerous different PWM circumstances.
高功率发光二极管（HPLED）经常以脉冲方式工作。本文所呈现的研究聚焦于HPLED在脉宽调制（PWM）下的光学、电学和热学行为，并且有以下两个目标。首先，研究HPLED效率的温度依赖性，发现在提出相关论断时，具体的操作方法和计算定义至关重要。其次，我们提出一种方法来模拟电流驱动的HPLED在PWM下的绝对发光通量。这是通过利用实验确定的HPLED特征参数来实现的。这样做的优点是，在研究HPLED在众多不同PWM情况下的行为时，无需进行进一步的物理测量。
