Late-news poster: Micro-cavity design of rgbw amoled for wide color gamut and low color shift

Previously, we reported two optical structures for bottom-emitting white OLED, exhibiting wide color gamut (> 100% NTSC) and high (> 40%) transmission through color filter. The panels employed RGBW color system for efficiency. The color shifts at oblique angles for the individual R, G, B, and R+G+B were maintained below Δu’v’ < 0.02 @ 60°. However, the colors produced by the combination of R/G/B subpixels and W subpixels exhibit large color shift when viewed at oblique angles because the luminance profiles, as a function of viewing angle, of the R/G/B which employ strong resonance, and the W which has weak resonance, are very different. In this report, we present a novel optical architecture for the W-subpixel. The color shift for the W-subpixel was reduced from Δu’v’ = 0.059 to 0.026 and the luminance profile was much closer to those of R/G/B subpixels. The efficiency of the W-subpixel with the new structure was on the same level as that of the conventional, plain, weak-resonance structure.