FLICKER AND VISUAL COMFORT EVALUATIONS OF LED PANEL DISPLAY

This study investigated the discomfort glare produced by the high brightness LED panel and aimed to reduce discomfort feelings by modulating four important factors: flicker frequency, luminance, panel area size and ambient illuminance. Twenty-five conditions were chosen by the orthogonal design. Levels of these factors were selected according to hardware specifications and common nighttime illumination conditions. The results show that visual comfort is not affected by ambient illuminance but by area size, luminance, and especially flicker frequency. We concluded that the range of flicker frequency around 8 Hz to 16 Hz is not suitable for LED panel display and the lower luminance the better. There are some evidences pointing out that these four factors have interactions with each other. The interaction must be considered in the future research.