Byeongjin Kim, a Ph.D. student of Color Lab, has published an article entitled “Comfortable Brightness of watching television in the Dark” in the Journal of Information Display(JID). In this study, he investigated the appropriate brightness of the display when watching the image and video in a dark room. In this experiment, the participants assessed the brightness of provided image stimuli with various levels of brightness. Through this research, he expects the display manufacturers can design the optimal dark mode of the display and televisions.
This study exploits an optimal display brightness for watching television in the dark. Two experiments were carried out in a dark room, and static and moving images were tested in each experiment. In Experiment I, three different, full-screen color images were presented with brightness levels ranging from 20 to 400 nit. A total of 23 college students assessed each stimulus’ degree of visual comfort. Experiment II was conducted with 31 participants, and six videos with a range of brightness from 20 to 500 nit were shown. As a result, when watching the static image, the participants’ assessments were almost the same among stimuli. However, when watching a video, the characteristics of the stimuli made the evaluation vary. This study provides empirical evidence and estimations of visual comfort based on display luminance that should be considered when designing for more comfortable viewing in a dark environment.