The optimal color temperature of smartphone display under various illuminant conditions

The purpose of this study is to find the optimal color temperature of the smartphone display, focusing on the relationship between the illuminant conditions and the ideal whites users perceive. The subjects viewed 16 nuanced whites under 19 illuminant conditions. The study reveals that there exists a positive correlation between the color temperature of illuminant and that of a smartphone display. The optimal color temperature of a white display ranged from 6000 K to 11000 K while the color temperature of illuminant varied from 2500 K to 20000 K. However, under lower illuminance, the correlation was relatively weaker confirming previous color reproduction theories.