Change of blue light hazard and circadian effect of LED backlight displayer with color temperature and age.
Change of blue light hazard and circadian effect of LED backlight displayer with color temperature and age.
复制标题
DOI：
10.1364/oe.26.027021
复制
发表时间：
2018-10-15
期刊：
影响因子：
3.8
通讯作者：
Chun, Li
中科院分区：
文献类型：
--
作者：
Chaopu, Yang;Wenqing, Fang;Chun, Li
为了给LED背光显示器的个性化设计和色温调节提供理论参考，测量了不同色温(1200~6500K)下LED背光显示器的光谱分布。根据不同年龄段(1~100岁)人眼的透过率，计算了LED背光显示器在不同年龄段人眼视网膜上的有效光谱分布。在对人眼响应函数进行拟合的基础上，分别对蓝光危害因子、400~500 nm波段蓝光所占比例、昼夜节律因子、446~477 nm波段蓝光所占比例与色温和年龄的变化进行了相关性研究。结果表明，蓝光危害和昼夜节律随色温的升高而增大，随年龄的增加而减小。对于一岁婴儿，当色温从1200K增加到6500K时，视网膜有效光谱的蓝光危害因子和昼夜节律因子分别增加了12.2倍和9.5倍。对于6500K的LED背光显示器，当年龄从1岁增加到100岁时，这两个因素的对应值分别下降了0.2和0.3倍。400-500 nm波长范围内的蓝光比例可以近似代替蓝光危害因子来表示蓝光危害的程度。这一结论可以为从蓝光危害和昼夜节律角度进行LED背光显示器的个性化设计和使用提供一定的理论参考。
In order to provide a theoretical reference for the personalized design and color temperature adjustment of LED backlight displayer, the spectral distribution of the LED backlight displayer at different color temperatures (1200-6500K) was measured. According to the transmittance of human eye at different ages (1-100 years old), the effective spectral distribution of the LED backlight displayer on the retina of the human eye at different ages was calculated. Based on the fitting of the response function of the human eye, the correlation studies on the changes of the blue light hazard factor, the proportion of blue light in the range of wavelength 400-500 nm, the circadian rhythm factor, and the proportion of blue light in the range of wavelength 446-477 nm with color temperature and age were conducted respectively. The results showed that the blue light hazard and circadian rhythm increased with the increase of the color temperature while decreased with the increase of age. For one-year-old infants, when the color temperature increased from 1200K to 6500K, the blue light hazard factor and circadian rhythm factor of the effective spectrum of the retina increased by 12.2 and 9.5 times respectively. For a 6500K LED backlight displayer, when the age increased from 1-year-old to 100 years old, the corresponding value of the two factors decreased by 0.2 and 0.3 times respectively. The proportion of blue light in the range of wavelength 400-500 nm can be used to approximately replace the blue light hazard factor to demonstrate the degree of blue light hazard. This conclusion can provide a certain theoretical reference for the personalized design and use of LED backlight displayer from the perspective of blue light hazard and circadian rhythm.