为了便捷准确地调节出8位LED背光液晶屏超低色温, 通过Adobe Photoshop软件设置填充色RGB数值, 在LED背光液晶屏上显示色块, 结合自制手机屏幕蓝光吸收膜, 实现超低色温调节。通过光谱分析研究了LED背光液晶屏1931 CIE-XYZ标准色度系统色坐标Z值、色容差、主波长、色纯度、峰值波长、质心波长、半峰宽、显色指数Ra随色温的变化, 实现了8位LED背光液晶屏1 000 K超低色温调节; 6 500～1 000 K 10个实测色温与目标色温的平均相对误差为0.349%, 平均绝对误差为7.1 K, 均可保证白平衡。光谱分析结果表明, 增加自制手机屏幕蓝光吸收膜后, 同一色温下会使质心波长平均下降15 nm。当色温小于4 100 K时, 同一色温下半峰宽减小约4 nm, 其他6个参数影响不大。该色温调节方法与结论对防蓝光膜效果最佳优化及液晶屏相关研究具有参考价值。

For convenient and accurate adjustment of ultra-low color temperature of 8-bit LED backlit LCD, the fill color RGB value was set through the Adobe Photoshop, display color blocks on LED backlit LCD, combined with self-made blue light absorption film of mobile phone screen, achieving ultra-low color temperature adjustment. 1931 CIE-XYZ standard chromaticity system color coordinate Z value, color tolerance, main wavelength, color purity, peak wavelength, centroid wavelength, half peak width, color rendering index Ra of LED backlit LCD, were studied by spectral analysis. We realized 8 bit LED backlit LCD 1 000 K ultra-low color temperature adjustment. The average relative error of the 10 measured 6 500-1 000 K color temperatures and the target color temperature is 0.349%, the average absolute error is 7.1 K, which can guarantee the white balance. According to the spectral analysis, after adding the self-made blue light absorption film of mobile phone screen, the centroid wavelength will decrease by 15 nm on average at the same color temperature. When the color temperature is less than 4 100 K, the half-peak width of the same color temperature is about 4 nm smaller. The other six parameters have little influence. The method and conclusion are valuable for optimizing the effect of anti-blue light film and the research of LCD.