14 May 2002 High-speed response time of LC mixtures containing fluoro-isothiocyanato liquid crystal compounds for LCD monitor and TV applications
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Abstract
A most important parameter for TV application of LCD is a fast switching time for displaying of moving image. To achieve the requirement of faster switching times, the novel LC single materials with large dielectric anisotropies (16~20), high clearing temperatures (195.5 ~ 237.4 degree(s)C), broad nematic ranges (up to 169.9 degree(s)C) and high birefringence (0.220 ~ 0.254) were developed. KUR-series LC mixtures blended these single materials have significantly higher clearing temperatures and dielectric anisotropy values compared with conventional LC mixture. Especially, clearing temperatures of them are 10~30 degree(s)C higher than their host mixture. These LC mixtures showing about 10ms of high-speed response time in TV/Monitor of TFT LCD, which are shorter enough to be addressed in one frame time of 60Hz (16.7ms). The threshold voltage Vth was low enough to operate at a driving voltage of 5V. The VHR values were found to high enough for TFT-LCD in wide temperature range. Our novel LC mixtures are suitable materials for inclusion in LC mixtures for TV application of TN-LCD.
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Yong Bae Kim and Il Kuk Huh "High-speed response time of LC mixtures containing fluoro-isothiocyanato liquid crystal compounds for LCD monitor and TV applications", Proc. SPIE 4658, Liquid Crystal Materials, Devices, and Applications VIII, (14 May 2002); doi: 10.1117/12.467446; https://doi.org/10.1117/12.467446
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