73‐2: Impact on the Observer Metameric Failure by Adding a White Channel to RGB‐Primary Display

Observer metamerism, or observer metameric failure, has emerged as a significant challenge for wide color gamut displays. To address this issue, multi‐primary displays have been proposed as a potential solution. However, their high manufacturing costs have hindered their commercialization in consumer products. One notable example of a successful multi‐primary display is white OLED technology. In this study, we investigated how the white sub‐pixel in the white OLED display affects observer metamerism. The results showed that observer metamerism decreases as the proportion of white sub‐pixels increases. Additionally, adding white sub‐pixels was particularly effective in improving metameric failure at narrower display spectra.