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A 5‐in. flexible ferroelectric liquid‐crystal display driven by organic thin‐film transistors
Author(s) -
Fujisaki Yoshihide,
Sato Hiroto,
Takei Tatsuya,
Yamamoto Toshihiro,
Fujikake Hideo,
Tokito Shizuo,
Kurita Taiichiro
Publication year - 2008
Publication title -
journal of the society for information display
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.578
H-Index - 52
eISSN - 1938-3657
pISSN - 1071-0922
DOI - 10.1889/jsid16.12.1251
Subject(s) - thin film transistor , materials science , backlight , liquid crystal display , optoelectronics , active matrix , flexible display , ferroelectricity , transistor , pentacene , organic field effect transistor , lamination , electrode , voltage , threshold voltage , field effect transistor , nanotechnology , electrical engineering , layer (electronics) , dielectric , chemistry , engineering
Abstract— An organic thin‐film‐transistor (OTFT) driven color flexible ferroelectric‐liquid‐crystal (FLC) display with 160 × 120 pixels and a resolution of 50 ppi has been developed. The flexible FLC was fabricated on a pentacene‐OTFT array using printing and lamination techniques. To drive the display at a fast driving speed, an OTFT was developed with a short channel length having a large current output. The fabricated OTFT array with a channel length of 5 μm exhibits a carrier mobility of 0.3 cm 2 /V‐sec and an ON/OFF ratio of over 10 7 at a low drain voltage of −6 V. A field‐sequential‐color system with a flexible backlight unit was also developed and used to drive the display. Color moving images were successively shown on the 5‐in. display using an active‐matrix driving technique of the OTFT.