Liquid crystal composition, liquid crystal display element, and liquid crystal display

Abstract

The invention discloses a dielectric positive liquid crystal composition. The ratio of the vertical dielectric constant to the dielectric constant of the composition is 1.2-1.7, and the birefringence coefficient is 0.097-0.100. The composition comprises, by mass, 48-64% of one or more compounds as shown in a formula I, 12-26% of one or more compounds as shown in a formula II, 0.5-2% of one compound as shown in a formula III, 1-16% of one or more compounds as shown in a formula IV and 8-15% of one or two compounds as shown in a formula V. The liquid crystal composition has high penetration rate, and is especially suitable for improving the penetration rate of a liquid crystal display in a plane orientation mode.

Description

technical field [0001] The invention belongs to the technical field of liquid crystal materials, and in particular relates to a liquid crystal composition, a liquid crystal display element and a liquid crystal display containing the liquid crystal composition. Background technique [0002] Display is the process of transforming data information that uses electrical signals as the medium of transmission into visual information that uses visible light as the medium of transmission. The device that completes the display is the Man-Machine Interface (MMI). A flat panel display (Flatpanel Display, FPD) is currently the most popular type of display device. Liquid Crystal Display (LCD) is the first product developed and commercialized in FPD. In terms of working principle, LCD is a display device that uses the light emitted by the backlight to generate light and shade corresponding to the light to display the image through the polarizer and the liquid crystal molecules of the liqu...

AI Technical Summary

Problems solved by technology

[0003] When the light is emitted from the backlight, it will pass through the polarizer, glass, liquid crystal, color filter, etc. in sequence, and finally only less than 6% of the light emitted from the backlight will remain, and the light utilization rate is very low.

Especially in the positive IPS / FFS (In-Plane Switching) / (Fringe Field Switching) display mode, the liquid crystal material at the edge of the electrode is affected by the inhomogeneous electric field, and the directors of the positive liquid crystal compound cannot be arranged horizontally under ideal conditions, while According to the direction of the electric field, it is more inclined to be vertically aligned, resulting in a decrease in the retardation of the liquid crystal in the electrode fringe field, and thus a low transmittance

Negative liquid crystal compositions can increase light transmittance, but have higher viscosity, slower response speed, and poorer reliability than positive liquid crystal materials

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