Liquid Crystal Mixtures of High Response Time and High $T_{NI}$ for LCD-TV Application

  • Ban, Byeong-Seob (R & D team AMLCD Division Semiconductor Business Samsung Electronics CO., LTD) ;
  • Kim, Bong-Hee (R & D team AMLCD Division Semiconductor Business Samsung Electronics CO., LTD) ;
  • Seo, Bong-Sung (R & D team AMLCD Division Semiconductor Business Samsung Electronics CO., LTD) ;
  • Yun, Yong-Kuk (R & D team AMLCD Division Semiconductor Business Samsung Electronics CO., LTD) ;
  • Sakong, Dong-Sik (R & D team AMLCD Division Semiconductor Business Samsung Electronics CO., LTD) ;
  • Chung, Kyu-Ha (R & D team AMLCD Division Semiconductor Business Samsung Electronics CO., LTD) ;
  • Kim, Yong-Bae (Liquid Crystal Research Center, Department of Chemistry, Konkuk University)
  • Published : 2002.08.21

Abstract

In In order to develop liquid crystal mixtures of high response time and high nematic-isotropic transition temperature ($T_{NI}$) for LCD-TV application, novel liquid crystal molecules with a fluoro-isothiocyanate moiety were synthesized. They showed remarkably high $T_{NI}$ over 200 $^{\circ}C$, wide mesophase range of 170 $^{\circ}C$, high dielectric anisotropy of 14 and high optical anisotropy of 0.19. New LC Mixtures of the high $T_{NI}$ ($85{\sim}100 ^{\circ}C$) and fast response time ($8{\sim}10ms$) were blended with the novel fluoro-isothiocyanate containing LC molecules, phenylcyclohexanes, bicyclohexanes and ester compounds. It was also studied on optimum pitch of liquid crystal for high speed twisted nematic LCD-TV applicaton. The LC mixtures show a fast speed of the below one frame rate in real 17" TV panel.

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