Indene-ring-containing compound and liquid crystal medium

Abstract

The invention relates to an indene-ring-containing compound in a structure of a formula I-1 or I-2 and also relates to a liquid crystal medium. The liquid crystal medium comprises the indene-ring-containing compound serving as a liquid crystal medium component and further comprises a compound shown as a formula II and a compound shown as a formula III. By optimized combination and optimized ratiosof various liquid crystal compounds, reasonable introduction of new functional groups into monocrystal compound structures and introduction of an indene ring into the compound shown as the formula I,compound stability is improved, and a clearing point is effectively raised. Appropriate high clearing point, appropriate double refraction anisotropy, high dielectric anisotropy, low rotary viscosityand high response speed are realized, and the compound is especially applicable to low-cell-gap high-image-display-quality active matrix MVA and PVA liquid crystal display components and liquid crystal displays.

Description

technical field [0001] The invention relates to a compound containing an indene ring, and also relates to a liquid crystal medium containing the compound containing an indene ring, which belongs to the field of liquid crystal display materials. Background technique [0002] As a leader in flat panel display technology, TFT-LCD has gradually occupied a dominant position in the display field. TFT-LCD is currently mostly used in high-end fields that have strict requirements on viewing angles, such as aerospace, medical treatment, and graphics and image processing. However, when viewed in a direction deviated from the normal direction of the display, the contrast of the display screen is obviously reduced, which seriously affects the application field of TFT-LCD. [0003] At present, the more popular wide viewing angle technologies mainly include TN+Wide Film, VA, including PVA, MVA, PSVA, etc., IPS, FFS, etc. Due to the high contrast and fast response of vertically oriented l...

AI Technical Summary

Problems solved by technology

However, when it is observed away from the normal direction of the display, the contrast of the display screen is significantly reduced, which seriously affects the application field of TFT-LCD.

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