Composition and liquid crystal display element using same

Abstract

In order to provide a composition that exhibits a liquid crystal phase in a wide temperature range, exhibits a low viscosity, good low-temperature solubility, a high specific resistance and voltage holding ratio, and is stable with respect to heat and light, and to further provide a favorable yield of an IPS or TN, etc., liquid crystal display element that, by using the composition, exhibits superior display quality and in which display defects such as burn-in and dripping marks are suppressed, provided are a composition including a compound expressed by formula (M-1.1) and one or more types of a compound expressed by general formula (L-1-2.2), and a liquid crystal display element using the same.

Description

technical field [0001] The present invention relates to a composition having a positive value for dielectric constant anisotropy (Δε) useful as a liquid crystal display material, and a liquid crystal display element using the same. Background technique [0002] Liquid crystal display elements started with clocks and calculators, and have been used in various measuring equipment, automotive panels, word processors, electronic notepads, printers, computers, televisions, clocks, and advertising display boards. Typical examples of the liquid crystal display system include a TN (Twisted Nematic) type, an STN (Super Twisted Nematic) type, a vertical alignment type using a TFT (Thin Film Transistor), an IPS (In-Plane Switching) type, and the like. The liquid crystal compositions used in these liquid crystal display elements are required to be stable against external stimuli such as moisture, air, heat, and light, and to exhibit a liquid crystal phase in the widest possible temperat...

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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