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为了从蓝光危害与节律效应角度给不同显示器的选购及使用提供参考,测量了不同色温(1200 K-6500 K)CCFL背光LCD、LED背光LCD、OLED以及CRT的光谱分布,根据人眼响应函数的拟合结果,计算了不同色温下四种显示器的蓝光危害因子、节律因子、400-500 nm蓝光占比以及446-477 nm蓝光占比。结果表明:四种显示器的蓝光危害和节律效应均随色温升高而增大;色温1200 K-6500 K内,OLED蓝光危害因子均最小;可利用400-500 nm蓝光占比代替蓝光危害因子近似表征蓝光危害强弱;色温为6500 K时,同时考虑蓝光危害与节律效应,四种显示器的优劣依次为:LED>OLED>CCFL>CRT。
In order to provide a reference for choosing and using different displays from the perspective of the hazard and rhythm of blue light, the spectral distributions of CCFL backlit LCDs, LED backlit LCDs, OLEDs and CRTs with different color temperatures (1200 K-6500 K) were measured. According to the human eye response function The blue hazard factor, rhythm factor, the proportion of 400-500 nm blue light and the proportion of blue light of 446-477 nm were calculated for four kinds of displays at different color temperatures. The results showed that both the blue hazard and the rhythm effect of the four kinds of displays increased with the increase of color temperature, and the lowest of the blue light in the color temperature of 1200 K-6500 K. The blue light of 400-500 nm could be used to replace the blue light hazard factor Approximately characterize the intensity of blue light damage; when the color temperature is 6500 K, taking into account the blue hazard and rhythm effects, the advantages and disadvantages of the four kinds of displays are as follows: LED> OLED> CCFL> CRT.