高显色指数LED灯的设计

Design for LED Lamps with High Color Rendering Index

针对目前室内照明用发光二极管(LED)灯显色性的不足,提出一种解决方案,采用3种不同类型的LED共同构成LED灯的发光模块。通过程序计算3种LED各自使用不同数目时的LED发光模块的色温、显色指数和光效。分析了每种LED使用数目的变化对结果的影响,同时以色温为3800K和4800K的结果为例对优化组合的选择加以说明,并从大量的结果中优选了不同色温下(3400K～5600K)显色指数(均在90左右)和光效都较为理想的组合结果。与其他提高白光LED显色指数的方法相比,本方案更易于实现,且更适用于室内照明灯具。该研究结果为LED灯在满足优质照明对显色性的要求方面提供了一个发展方向。

Aiming at the insufficiency of color rendering of existing light-emitting diode （LED） based lamps used for indoor lighting, a solution of LED modules consisting of three different kinds of LED is proposed. Correlated color temperature （CCT）, color rendering index （CRI） and luminous efficiency （LER） of LED modules are calculated when different numbers of three kinds of LED are set respectively. Influences of changing the number of each kind of LED on the results are analyzed. Besides, the selections of optimized combinations are described by setting results on CCT values of 3800 K and 4800 K as examples. Moreover, ideal results with high CRI （90 around） as well as good LER on different CCT values （3400 K^5600 K） are acquired. This solution is easier to impletment and more suitable for indoor lighting lamps compared with other methods used for improving CRI of white LED. This result may provide some guidance for the design of LED-based lamps with satisfying CRI for quality lighting.