51results about How to "Proper Dielectric Anisotropy" patented technology

Provided is a liquid crystal compound satisfying at least one physical property from among having excellent stability with respect to heat, light, or the like, a high clearing point, a low liquid-crystal-phase lower limit temperature, a low viscosity, a suitable optical anisotropy, a large negative dielectric anisotropy, a suitable elastic constant, and excellent compatibility with other liquid crystal compounds. The compound is represented by formula (1). In formula (1): R1 and R2 represent C1-15 alkyl groups; ring A1 and ring A2 represent 1, 4-cyclohexylene or 1, 4-phenylene; Z1 and Z2 represent single bonds, -(CH2)2-, -CH=CH-, -C≡C-, -COO-, -OCO-, -CH2O-, -OCH2-, -CF2O-, -OCF2-, or -CF=CF-; a and b represent 0, 1, or 2; and the sum of a and b is 1 or 2.

The invention provides a liquid crystal composition. The liquid crystal composition contains at least one compound of a formula I, at least one compound of a formula II, and at least one compound of aformula III. The liquid crystal composition has high optical anisotropy and also has relatively large elastic constants K11 and K33 while maintaining a high clearing point, appropriate dielectric anisotropy, and good low-temperature mutual solubility. The invention also provides a liquid crystal display device containing the liquid crystal composition; and the display device has the advantages offast response, high contrast, large temperature width range, and the like, thereby having a good display effect and a wide application range.

The invention provides a liquid crystal composition and its application. Based on the total weight of the liquid crystal composition, the liquid crystal composition of the present invention comprises: 3-10% of one or more compounds of general formula I, 30-60% of one or more compounds of general formula II, 15-30% of one or more compounds of general formula III, 0-15% of one or more compounds of general formula IV, 5-30% of one or more compounds of general formula V , and 0-30% of one or more compounds of general formula VI. The liquid crystal composition of the present invention has proper optical anisotropy, proper dielectric anisotropy, higher clearing point, lower driving voltage and fast response characteristics, is suitable for liquid crystal displays, and satisfies high wear resistance of liquid crystal displays. Transparency and fast response requirements.

The invention discloses a liquid crystal composition and a photoelectric display device. The liquid crystal composition comprises, based on the total weight of the composition, 1-30% of at least one compound shown as a general formula I, 5-35% of at least one compound shown as a general formula II and 10-50% of at least one compound shown as a general formula III. The liquid crystal composition has a proper clearing point, proper optical anisotropy, proper dielectric anisotropy, higher voltage retention rate, higher transmittance, better high-temperature resistance and higher response speed, and is suitable for VA, IPS, FFS and other display modes.

The invention discloses a liquid crystal composition containing bicycle-octane, belonging to the field of liquid crystal display materials. The liquid crystal composition is composed of 1-40% of a positive dielectric compound containing a component A shown in the general formula I, 2-40% of a positive dielectric compound containing a component B shown in the general formula II and / or general formula III and 10-80% of a neutral dielectric compound containing a component C shown in the general formula IV; in addition, optically active compound which is 0-0.5% of the sum of the mass of the liquid crystal composition is added. The liquid crystal composition is low in viscosity, short in response time, proper in photology, good in anisotropy, proper in dielectric anisotropy and particularly suitable for manufacturing quick-response active matrix TN-TFTs (Twisted Nematic Thin Film Transistors), IPS-TFTs (In-Plane Switching Thin Film Transistors) or FFS (Fringe Field Switching) liquid crystal display elements and liquid crystal displays.