LED车灯的光色不均缘娜性标准和测量技术探讨.pdfVIP

LED车灯的光色不均匀性标准和测量技术探讨 1 1 2 1 黄艳 李晟 郭志军 潘建根 1远方光电科学研究院 2远方光电信息股份有限公司 摘要 相比较传统的卤素灯和氙气灯，LED具有独到的优势，如寿命长，发光效率 高，响应速度快，体积小，设计可塑性强等。近几年来，LED 已逐渐被应用在汽 车前照灯中，尤其是在高端车型中。然而，与传统光源相比，LED车灯也有必须 考虑的独特问题，光色性能便是其中一个重要方面。由于其本身发光特性以及温 度影响，LED车灯极易出现颜色漂移以及空间颜色不均匀的现象，这些现象不仅 仅会影响整个车体的外观，也会带来安全隐患。本文将重点分析LED车灯的特性 以及不良光色性能的成因，介绍相关标准中对车灯光色性能的要求，并探讨LED 车灯光色性能的测量方案。 关键词：LED车灯，空间颜色不均匀性，相关标准，测量方案。 LatestStandardandMeasurementTechnologiesonTheSpatialColor NonuniformityofLEDAutoLamps 1 1 2 1 YanHuang ShengLi ZhijunGuo JiangenPan 1 EVERFINEInstituteofOptoelectronics 2 EVERFINEPhoto-E-InfoCo.,Ltd. Abstract In comparison with conventional lamps such as Halogen Lamp and High IntensityDischarge,LEDhastheunusualstrengthswithlonglifetime,highefficiency, fastresponse, smallsize,highplasticityandsoon.Inthelastfewyears,LEDapplied for auto headlamps in gradually and especially for luxury autos. However, the compare between LED lamps and conventional lamps, LED also has the unusual problem to consider. The photochromic performance is an important part of them. Duetothe specialcharacteristicsofluminesenceandtemperture influence,LEDauto lamp easiliy to appear the spactial color nonuniformity and color drift. These apperancesnotonlybringthesatetyproblem,butalsoinfluencetheautoapperance. This paper will major introduce the spatial color distribution of LED characterstics,andanalyzethereasons ofpoorphotochromicperformance. Thecolor specification requirements of LED auto lamps will be introduced in relatived standardsanddiscussthemeasurementmethodsofLEDcolorperformance. Keywords: LED auto lamps, spatial color nonuniformity, relevant standards, measurementsolutions. 1. 前言 LED是一种将电能直接转化为光能的半