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Dual‐plate OLED display (DOD) based on amorphous‐silicon (a‐Si) TFT backplane
Author(s) -
Han ChangWook,
Tak Yoon Heung,
Kang In Byeong,
Ahn ByungChul,
Chung In Jae
Publication year - 2009
Publication title -
information display
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.182
H-Index - 20
eISSN - 2637-496X
pISSN - 0362-0972
DOI - 10.1002/j.2637-496x.2009.tb00039.x
Subject(s) - backplane , oled , thin film transistor , substrate (aquarium) , amoled , optoelectronics , materials science , luminance , amorphous silicon , silicon , active matrix , electrical engineering , optics , engineering , nanotechnology , layer (electronics) , crystalline silicon , physics , oceanography , geology
An improved AMOLED with an a‐Si TFT backplane based on a unique structure is reported. The new structure is refered to as a dual‐plate OLED display (DOD). While a topemission OLED array is directly fabricated on a TFT backplane, the DOD consists of an upper OLED substrate and a lower TFT substrate, which are independently fabricated. Because the OLED substrate, which is fabricated through the process flow of bottom emission, is attached to the TFT substrate, the light is emitted in the opposite direction to the TFT backplane. The DOD enables the design of large‐sized TFTs and a complicated pixel circuit. It can also not only achieve higher uniformity in luminance in large‐sized displays due to the low electrical resistance of the common electrode, but also wider viewing angles.