大尺寸LED彩色显示屏的人眼光生物安全性分析

Photobiological Safety Analyzing of Large-Size LED Color Screen for Human Eyes

大尺寸LED点阵彩色显示屏因其特有的高亮度、广色域、高对比度等优势在众多场合中受到人们青睐;同时,该类显示屏对人眼的光生物安全性问题也受到人们重视。本文依据现行的国际标准,对LED显示屏的光生物安全性,从视网膜蓝光危害和热危害两个方面,进行了测量,并选取了两台等离子(PDP)电视和液晶(LCD)电视样机作为比对。结果表明,对三种测试样品,在同等亮度和白场条件下,LED彩色显示屏的对人眼视网膜的危害指数与等离子(PDP)电视和液晶(LCD)电视没有显著性差异。

Large-size LED lattice color screen is widely used due to the advantages of high brightness, wide color gamut, high contrast etc.;meanwhile the photobiological safety issue of LED screen is con-cerned. According to current CIE standard, this paper sets up an objective model for evaluating the photobiological safety of LED screen. Based on this model, by using the spectral radiance mea-surement, this paper calculates the blue light hazard and heat radiation hazard on human retina of LED color screen, also those of PDP television and LCD television as comparison. The results show that, in the same brightness and white point application, the hazard index on human retina of LED color screen does not have obviously differences from PDP television and LCD television.