Browsing by Author "Lee, Chin-Yang"

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Anchoring Energy Enhancement for Plasma Alignment Technology
(2009)
Hsu, Chih-Yi
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Lee, Tse-Hsien
;
Chen, Huang-Ming Philip
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Kuo, Hui-Chien J.
;
Chen, Yi-Fan
The oxygen plasma post-treatment was adopted for alignment preparation in Ar plasma alignment process. The light leakage at the dark slate was suppressed by the new treatment. The NEXAFS data suggested that the out of plane carbonyl groups have been regenerated under oxygen plasma post-treatment. The polar anchoring energy was two times increased comparing to the Ar treated PI. The cell's EO properties by new plasma treatment were comparable to the rubbed PI surface.
Innovative plasma alignment method in flexible liquid crystal display films
(2007)
Liu, Kang-Hung
;
Lee, Chin-Yang
;
Ho, Cheng-Ta
;
Cheng, Horng-Long
;
Lin, Shih-Ting
Liquid crystals (LCs) in flexible cell were aligned on polyimide (PI) surface treated by a paperlike plasma beam. The beam had energy of 450 eV and incident angle of 70 with respect to normal flexible indium-zinc oxide-coated substrate. The pretilt angle and anchoring energy of LCs on plasma-aligned PI surface were almost identical to the angle and energy of the rubbing PI. However, optical performance of the plasma-aligned cell was superior to the rubbing cell under various bending conditions. Furthermore, such noncontact alignment technology is suitable for large area and roll-to-roll fabrication of flexible LC films. (c) 2007 The Electrochemical Society.
Medical displays by using plasma-beam-alignment technology
(2008-01-01)
Lee, Chin-Yang
;
Liu, Chi-Hung
;
Chen, Chih-Wei
;
Miki, Saodo
;
Chen, Huang-Ming Philip
Novel anode layer plasma within minimum chamber space was developed for non-contact alignment process. The plasma-treated polyimide (PI) surface showed no particle contamination and no micro-scratches. Surface morphology was investigated by using scanning electron microscope (SEM), an atomic force microscope (AFM), and X-ray photoemission spectroscopy. The different oxygen-to-carbon ratio ([O]/[C] ratio) for XPS spectra indicated a composition change after plasma treatment. Surface pretilt angles were varied from 0 to 2.1 degrees under different plasma exposure times. Finally, a prototype 20.8-in. QXGA IPS-mode gray-scale medical liquid-crystal display was successfully demonstrated with high contrast ratio, excellent uniformity, and wide viewing angle using this new plasma-beam-alignment technique.
Plasma beam alignment technique for OCB mode liquid crystal display
(2007)
Chou, Hong-Chieh
;
Wu, Wei-Qing
;
Chen, Yi-Fan
;
Chen, Huang-Ming Philip
;
Lee, Chin-Yang
Plasma beam alignment technique for OCB mode was first adopted in this study. Different exposure time of OCB cells were fabricated with sheet-like accelerated Ar+ plasma generated from anode layer thruster (ALT). Fast response time (3.3 ms) was revealed and has the potential for OCB mode LCD to replace conventional rubbing process.