Improvement of fast responsive LC materials by bent-core dopants in optical compensated bend mode liquid crystal displays

Hong-Cheu Lin*, Ling Yung Wang, Meng Dan Jiang, Shin Yi Tsai, Szu Fen Fenny Chen, Robert Lyu, Chi Neng Mo

*Corresponding author for this work

Research output: Contribution to journalArticle

2 Scopus citations

Abstract

Stabilization of bend configuration in optical compensated bend (OCB) mode cells by doping bent-core molecules was developed in this study. The values of response time (t) and threshold voltage (V th) in OCB cells were dependent not only on the concentration but also on the shape, dipole direction, and flexible chain length of the doping molecules. Experimental results showed that the total response time (t total) and threshold voltage (V th) of OCB cells could be reduced by doping bent-core molecules, and smaller t values produced by reducing flexible chain lengths. In addition, attaining smaller V th values could be achieved by reducing polarization of bent-core molecules. In general, higher concentrations of dopants normally induced shorter field-on response time (t on) and a minimum field-off response time (t off) occurred at 0.5% of doping concentration, where the fastest total response time (t total) values were achieved.

Original languageEnglish
Pages (from-to)311-318
Number of pages8
JournalJournal of the Chinese Institute of Engineers, Transactions of the Chinese Institute of Engineers,Series A/Chung-kuo Kung Ch'eng Hsuch K'an
Volume34
Issue number2
DOIs
StatePublished - 1 Mar 2011

Keywords

  • Bent-core dopant
  • Fast response
  • OCB mode cell

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