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13.4: A 20.8‐inch WXGA Full Color AMOLED Display by Integrating Scattering Reflector with Micro‐Bumps
Author(s) -
Okutani Satoshi,
Kamiura Norihiko,
Sano Hiroshi,
Sawatani Takumi,
Fujita Daisuke,
Takehara Toshifumi,
Sunohara Kazuyuki,
Kobayashi Michiya,
Ibaraki Nobuki
Publication year - 2007
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 - 10.1889/1.2785256
Subject(s) - oled , reflector (photography) , amoled , materials science , scattering , optoelectronics , optics , light scattering , substrate (aquarium) , diode , layer (electronics) , nanotechnology , light source , physics , oceanography , geology , active matrix , thin film transistor
In order to improve light extraction efficiency from organic light emitting diodes (OLED), we report a novel structure of top‐emission OLED by integrating a scattering reflector with micro‐bumps into the substrate. The mechanism of light extraction has been investigated by evaluating the dependency of flux on the shape of the micro‐bumps. It was confirmed that the scattering effect of the micro‐bumps improves the light extraction of OLED. Moreover, the scattering reflector has been applied on a 20.8‐inch WXGA full color AMOLED display. This is the world's first report that actually proves a light extraction technology, integrating scattering reflector, applied on AMOLED display.