40results about How to "Clear point height" patented technology

A liquid crystal composition contains one or more compounds represented by formula I, one or more compounds represented by formula II, and one or more compounds represented by formula III. The liquidcrystal composition has a low viscosity, can realize quick response, and has a moderate dielectric anisotropy delta epsilon, a proper optical anisotropy delta n and a high stability to heat and light.A liquid crystal display element or a liquid crystal display containing the liquid crystal composition has the advantages of wide nematic phase temperature range, proper birefringence anisotropy, very high resistivity, good ultraviolet resistance, high charge retention rate, low vapor pressure and the like.

The embodiment of the invention provides negative thermal expansion microspheres, a preparation method and a liquid crystal display panel and relates to the technical field of display. A LC Margin range can be widened, low-temperature bubbles and uniform gravitational display are decreased, and the problem of liquid crystal clearing points for ensuring normal display can be avoided. The liquid crystal display panel comprises an adjusting layer arranged on the surface, in contact with a liquid crystal layer, of an array substrate and / or arranged on the surface, in contact with a liquid crystal layer, of a paired box substrate, wherein the adjusting layer includes the negative thermal expansion microspheres and is arranged in a no-light-transmitting portion of a display zone and a non-display zone within a frame adhesive, and the negative thermal expansion microspheres include sealed housings and inner cores coated by the sealed housings. The sealed housings are made from a negative thermal expansion material. The inner cores comprise heat storage bodies, and the heat storage bodies are made from a heat storage material. The volumes of the heat storage bodies in the heat absorbing process are smaller than or equal to the volumes of the sealed housings in thermal expansion.

The invention relates to the field of liquid crystals, and in particular relates to fluorine-containing dibenzothiophene sulfone single liquid crystal applied in a liquid crystal composition and a liquid crystal display, and a preparation method thereof. The fluorine-containing dibenzothiophene sulfone single liquid crystal has the structure formula shown in the specification, wherein in the formula, X is H or F, Y is H or F, W is linear-chain alkyl or linear-chain alkoxyl of C1-C10; and at least one substituent group of X and Y is F. According to the fluorine-containing dibenzothiophene sulfone single liquid crystal and the preparation method and applications thereof, not only is the synthesis method simple, but also the fluorine-containing dibenzothiophene sulfone single liquid crystal contains the two polar groups of fluorine and dibenzothiophene sulfone, so that the polarity of molecules can be enhanced, and the product has wider nematic phase temperature range, as well as larger anisotropicity and higher resistivity; and the fluorine-containing dibenzothiophene sulfone single liquid crystal can be liquid crystal components to improve the property of the liquid crystal material, and can also be used for producing the liquid crystal display.

The invention discloses a compound shown in the formula I. R1 and R2 are respectively selected from hydrogen atoms or alkyl groups or alkoxy groups with 1-15 carbon atoms, A1, A2, A3 and A4 are respectively selected from the following groups (please see the groups in the specification), L1, L2 and L3 are respectively selected from -CF2O and alkyl groups or alkoxy groups with 1-12 carbon atoms, and a, b, c, d, e, f and g are respectively selected from 0 or 1. A liquid crystal composition comprises 1-5 kinds of compounds. A liquid crystal displayer contains the liquid crystal composition.

The present invention relates to a compound containing an indene ring. The compound has the structure of general formula I-1 or I-2. The present invention also relates to a liquid crystal medium, which comprises the above-mentioned compound containing an indene ring as a component of the liquid crystal medium, and further comprises a compound represented by the general formula II and a compound represented by the general formula III. In the present invention, through the optimized combination and optimal ratio of various liquid crystal compounds, through the rational introduction of new functional groups into the structure of single crystal compounds, the compound shown in general formula I introduces an indene ring, which improves the compound's Stability, and effectively improve the clearing point. The invention achieves the effects of proper high-definition bright spots, proper birefringence anisotropy, high dielectric anisotropy, low rotational viscosity, and fast response speed, and is especially suitable for active matrix MVA with low box thickness and high display quality pictures , PVA liquid crystal display components and liquid crystal displays.

The invention provides a TN first minimum nematic liquid crystal mixture, which comprises 8 to 35 percent of at least one liquid crystal compound shown in a formula (I), 8 to 15 percent of at least one liquid crystal compound shown in a formula (II), 37 to 80 percent of at least one liquid crystal compound shown in a formula (III) and 0 to 24 percent of an optional liquid crystal compound shown in a formula (IV). An antistatic compound is added in the preparation process. The mixing process is carried out in a closed container with the vacuum degree between -100 and -50 KPa. Because the liquid crystal mixture adopts the liquid crystal compounds with good low-temperature property and big dielectric constant as well as the liquid crystal compounds with high clearing point and less temperature dependence, and is added with the antistatic compound, so that the liquid crystal mixture is good in comprehensive property.

The invention discloses compounds, liquid crystal composition and a liquid crystal display. The compounds are as shown in the formula I in the description. The liquid crystal composition contains at least one of the compounds. The liquid crystal display is made of the liquid crystal composition.

The invention discloses a compound, a liquid crystal composition and a liquid crystal display (LCD). The compound is as shown in the formula I in the specification. In the formula I, R1 and R2 are respectively selected from hydrogen atom, fluorine atom or C1-15 alkyl group or alkoxy group; A1, A2, A3 and A4 are respectively selected from groups as shown in the specification; at least one group in L1, L2 and L3 is -CF2O and other groups are respectively selected from C1-12 alkyl group or alkoxy group; and a, b, c, d, e, f and g are respectively selected from 0 or 1. The liquid crystal composition comprises 1-5 types of the above compound. The LCD contains the above liquid crystal composition.