P-138: Improvement of optical compensated bend (ocb) and vertical alignment (va) mode liquid crystal displays by nano-alignment technique

Wei Hong Chen, Shia Fan Wang, Hong Cheu Lin, Yung Lung Mo, Yun Ching Chuang, Szu Fen Fenny Chen

Research output: Contribution to journalConference article

Abstract

Surface-modified silicon oxide (SiO2) nanoparticles containing surfactants with amino end-groups were synthesized. The amounts of surfactants anchoring on SiO2 nanoparticles were characterized to research 8 wt% by thermogravimetric analysis (TGA). The characteristic amino peak of surfactants on SiO2 nanoparticles can also be confirmed by nuclear magnetic resonance (NMR) spectroscopy. By spin-coating reactive surface-modified SiO2 nanoparticles on the pre-cured polyimide (PI), amino end-groups of the surfactants can be further reacted with pre-cured PI layer over the ITO surface by thermo-curing. Moreover, the distribution of post-cured nanoparticles in the optical compensated bend (OCB) and vertical alignment (VA) cells have been investigated by scanning electron microscope (SEM). As a result, the newly developed nano-alignment technique with different process conditions, such as various particle sizes and concentrations, can be applied to improve the threshold voltage, response time, and pre-tilt angle in the OCB and VA mode liquid crystal display (LCD) cells.

Original languageEnglish
Pages (from-to)1637-1640
Number of pages4
JournalDigest of Technical Papers - SID International Symposium
Volume40
Issue number1
DOIs
StatePublished - 1 Jan 2009
Event2009 Vehicles and Photons Symposium - Dearborn, MI, United States
Duration: 15 Oct 200916 Oct 2009

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