Nematic liquid crystal composition and liquid crystal display element using same
A liquid crystal composition and compound technology, which is applied in liquid crystal materials, optics, instruments, etc., can solve problems such as low viscosity, and achieve the effects of low rotational viscosity, practical reliability, and excellent liquid crystallinity
Active Publication Date: 2016-07-06
DIC CORP
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- Abstract
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- Application Information
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Problems solved by technology
(Patent Document 5 to Patent Document 18) However, likewise, these liquid crystal compositions have not yet achieved sufficiently low viscosity
Method used
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Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1 and comparative example 1
[0199] The content ratios and physical property values of the compounds of the prepared liquid crystal composition of the present invention (Example 1) and the liquid crystal composition prepared for comparison (Comparative Example 1) are shown below.
[0200] [Table 2]
[0201]
Embodiment 2～ Embodiment 4
[0204] The liquid crystal compositions (Examples 2 to 4) prepared so as to have approximately the same Δε as in Example 1 and their physical property values are shown below.
[0205] [table 3]
[0206]
[0207] Like the liquid crystal composition of Example 1, the viscosity was low.
Embodiment 5 and comparative example 2
[0209] The content ratios and physical property values of the compounds of the prepared liquid crystal composition of the present invention (Example 5) and the liquid crystal composition prepared for comparison (Comparative Example 2) are shown below.
[0210] [Table 4]
[0211]
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Abstract
The present invention provides a liquid crystal composition which is characterized by having an adjusted refractive anisotropy ([delta]n), while having a sufficiently low viscosity (eta) and a positive dielectric anisotropy ([delta] epsilon) with a large absolute value without deteriorating the temperature range of a nematic phase. This liquid crystal composition is chemically stable with respect to heat, light, water and the like and can be driven at a low voltage, thereby being highly reliable and practical, while having excellent display characteristics. Consequently, this liquid crystal composition is useful for a display element such as a mobile terminal, a liquid crystal TV and a monitor.
Description
technical field [0001] The present invention relates to a nematic liquid crystal composition having a positive dielectric constant anisotropy (Δε) useful as an electro-optic liquid crystal display material. Background technique [0002] Liquid crystal display devices are used in various measuring instruments such as clocks and calculators, automotive panels, word processors, electronic notebooks, printers, computers, televisions, clocks, advertising display boards, etc. Representative liquid crystal display methods include TN (Twisted Nematic) type, STN (Super Twisted Nematic) type, VA type characterized by vertical alignment using TFT (Thin Film Transistor), and IPS characterized by horizontal alignment. (plane switching) type / FFS type, etc. The liquid crystal composition used in these liquid crystal display elements is required to be stable against external factors such as moisture, air, heat, light, etc., and to display a liquid crystal phase in as wide a temperature ran...
Claims
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IPC IPC(8): C09K19/42C09K19/12C09K19/20C09K19/30C09K19/32C09K19/34C09K19/54G02F1/13
CPCC09K19/20C09K19/322C09K19/44C09K2019/0466C09K2019/124C09K2019/3012C09K2019/3019C09K2019/3025C09K2019/3422
Inventor 谷口士朗河村丞治
Owner DIC CORP