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P‐196L: Late‐News Poster : Micro‐Cavity Design of RGBW AMOLED for Wide Color Gamut and Low Color Shift
Author(s) -
Lee Baekwoon,
Hwang Young In,
Lee Haeyeon,
Kim Sungchul,
Kim Sangsoo,
Ju Younggu
Publication year - 2009
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1889/1.3256676
Subject(s) - subpixel rendering , gamut , optics , materials science , ntsc , luminance , oled , transmission (telecommunications) , optoelectronics , pixel , physics , computer science , layer (electronics) , nanotechnology , telecommunications
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.