Composition and liquid crystal display element using same

Abstract

The objective of the present invention is to provide a composition which exhibits a liquid crystalline phase over a broad temperature range, has reduced viscosity, has good solubility at low temperatures, has high resistivity and voltage holding ratio, and is heat and light stable. The objective of the present invention is also to provide, with a high yield by using the composition, liquid crystal display elements of IPS types, TN types, etc. which have excellent display quality and do not tend to cause display defects such as burn-in or drop marks. The present invention provides a composition which comprises a compound represented by general formula (i), and liquid crystal display elements using the same.

Description

technical field [0001] The present invention relates to a composition having a positive dielectric constant anisotropy (Δε) useful as a liquid crystal display material, and a liquid crystal display element using the same. Background technique [0002] From clocks and calculators, liquid crystal display components have developed into various measurement equipment, automotive panels, word processors, electronic notepads, printers, computers, televisions, clocks, advertising display boards, etc. Typical liquid crystal display methods include TN (Twisted Nematic) type, STN (Super Twisted Nematic) type, vertical alignment type using TFT (Thin Film Transistor), and IPS (In-Plane Switching) type. The liquid crystal composition used in these liquid crystal display elements is required to be stable against external stimuli such as moisture, air, heat, light, etc., to exhibit a liquid crystal phase in as wide a temperature range as possible around room temperature, to have low viscosi...

AI Technical Summary

Problems solved by technology

If the difference between the injection amount and the optimum value becomes large, the balance between the refraction index and the driving electric field designed in advance of the liquid crystal display element will collapse, and display defects such as the occurrence of spots and poor contrast will occur.

In particular, it is difficult to control the deviation from the optimum value within a certain range since the optimum liquid crystal injection amount is small, especially for the small liquid crystal display elements that are widely used in the recently popular smartphones.

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