Image Vividness Changes due to White‐Boosting on WOLED Display

ABSTRACT White‐Boosting is a display technique for White Organic Light‐Emitting Diode (WOLED) panels with an RGBW subpixel layout, designed to increase peak brightness. This study explored how White‐Boosting influences the perception of image vividness through psychophysical testing using a paired‐comparison method. Participants viewed pairs of images with identical content but simulated under different display conditions and indicated which appeared more vivid. Across three experiments involving 15–20 participants and 10 image stimuli, peak luminance, chromaticity gamut area, and White‐Boosting ratio were systematically varied. The findings revealed a clear trend: Higher White‐Boosting levels consistently enhanced perceived vividness. In addition, the color gamut volume (CGV) derived in the CIELAB color space using a single reference white condition—referred to as perceptual color gamut volume (pCGV)—demonstrated strong predictive power for the average vividness ratings across display settings. These results highlight the potential of White‐Boosting to enhance the visual impact of WOLED displays and suggest that pCGV can serve as a practical objective indicator for predicting subjective vividness.