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68.4: Micro‐cavity Design of RGBW AMOLED for 100% Color Gamut
Author(s) -
Lee Baekwoon,
Hwang Young In,
Lee Haeyeon,
Kim Chi Woo,
Ju Younggu
Publication year - 2008
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 - 10.1889/1.3069314
Subject(s) - gamut , ntsc , materials science , subpixel rendering , rgb color model , oled , optics , optoelectronics , transmission (telecommunications) , pixel , computer science , physics , computer vision , telecommunications , layer (electronics) , composite material
We report two optical structures for bottom‐emitting white OLED. We employed RGBW color system because of its high efficiency. for RGB‐subpixels, the cavity resonance was enhanced by dielectric mirror, and for W‐subpixel, the mirror was removed. Optical lengths were controlled by two different methods: by the thickness of dielectric filler on top of the mirror or by the angle of oblique emission. with both methods, we were able to fabricate AMOLEDs that exhibited color gamut exceeding 100% NTSC. More importantly, the transmission of white OLED through R/G/B color filters was significantly higher (up to 50%) than that of the conventional structure employing no mirror, even though the color gamut increased from ∼75% to ∼100%.