Positive dielectric anisotropy liquid crystal composition, liquid crystal display element or liquid crystal display

The invention discloses a nematic liquid crystal composition with positive dielectric anisotropy. The liquid crystal composition comprises one or more compounds as shown in a formula I and one or more compounds as shown in a formula II. The composition has the characteristics of high transmittance, high dielectric anisotropy, high optical anisotropy, high vertical dielectric anisotropy, high epsilon perpendicular to/delta epsilon ratio, wide nematic phase temperature range, strong ultraviolet resistance and high temperature resistance, no residual image defect and the like. The invention also discloses a liquid crystal display element and a liquid crystal display comprising the liquid crystal composition. 本发明公开了一种正介电各向异性向列相液晶组合物，所述液晶组合物包含一种或多种式Ⅰ所示的化合物、以及一种或多种式Ⅱ所示的化合物。该组合物兼具高的透过率、高的介电各向异性、较高的光学各向异性、高的垂直介电各向异性、高的ε⊥/Δε比值，较宽的向列相温度范围，以及抗紫外抗高温能力强，无残像缺陷等特征。本发明还公开了包含该液晶组合物的液晶显示元件和液晶显示器。