P‐196L: Late‐News Poster: Micro‐Cavity Design of RGBW AMOLED for Wide Color Gamut and Low Color Shift

Abstract

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.

46‐4: 513‐ppi Hybrid Display with Stacked Transistors

“…For these reasons, we develop a color display using a bottom-emission white tandem OLED and a color filter in order to increase the resolution [31]. Furthermore, the RGBW structure was employed instead of the RGB structure [32,33].…”

High-resolution OLED display with remarkably low power consumption using blue/yellow tandem structure and RGBY subpixels

“…[2][3][4] For the white subpixel, light emission from the white OLED can be used directly without a color filter, leading to high efficiency and low power consumption.…”

70.1: High‐Resolution OLED Display with the World's Lowest Level of Power Consumption Using Blue/Yellow Tandem Structure and RGBY Subpixels

“…As a solution to these performance problems, an OLED display using a white OLED with red, green, blue, and white (RGBW) subpixels has been reported [2][3][4]. For the white subpixel, light emission from the white OLED can be used directly without a color filter, leading to high efficiency and low power consumption.…”