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

The invention discloses a liquid crystal display composition. The composition comprises the following components by mass percent: 13-62 percent of at least one of liquid crystal compounds of first component shown by Formulas 1-1, 1-2 and 1-3, 5-60 percent of at least one of liquid crystal compounds of second component shown by Formulas 2-1 and 2-2, 7-38 percent of at least one of liquid crystal compounds of third component shown by Formulas 3-1, 3-2 and 3-3 and 0-10 percent of liquid crystal compound of forth component shown by Formula 4. The liquid crystal composition in the invention has the characteristics of wide nematic phase range, appropriate optical anisotropy values, low threshold voltage, low rotary viscosity and the like, is applied to liquid crystal displays of various applications, especially liquid crystal display elements driven by active-matrix thin film transistors with positive dielectric anisotropy.

The invention relates to a negative dielectric anisotropic liquid crystal composition which comprises a first component, a second component and a third component, wherein the first component is at least one compound selected from a negative dielectric anisotropic compound group as shown in Formula I; the second component is at least one compound selected from a negative dielectric anisotropic compound group as shown in Formula II; the third component is at least one compound selected from a neutral dielectric anisotropic compound group as shown in Formula III. According to the invention, the liquid crystal composition has excellent room-temperature and low-temperature solubility, light stability and thermal stability, and is suitable for liquid crystal display devices, especially FFS or IPS, MVA, PVA, PSVA, UV2A and other active matrix display devices based on VA effect.

The invention discloses a liquid crystal composition for active matrix driven liquid crystal display. The composition contains compounds shown in formulas I-III. According to the invention, a liquid crystal composition taking a difluoromethoxy-bridge simultaneously containing cyclopentyl in molecules thereof as a connecting group is used for improving the comprehensive performance of liquid crystal compositions so as to obtain different optimal combinations for meeting the needs of different display modes, therefore, the liquid crystal composition has an important practical value.

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 belongs to the technical field of liquid crystal materials, and particularly relates to a dibenzofuran polymerizable compound and an application thereof. The liquid crystal compound provided by the invention has a structure as shown in a general formula I. Compared with the prior art, the polymerizable liquid crystal compound provided by the invention has good solubility and a betteralignment effect, the polymerization rate is higher, polymerization is more complete, and the residue amount is lower, so that the problem of poor display is improved to a large extent. A liquid crystal composition containing the compound is better in alignment effect, is polymerized more completely and has fewer residues. Moreover, the compound is low in price and stable in performance, can be widely applied to the field of liquid crystal display, and has an important application value.

The invention discloses a compound, a liquid crystal composition and a liquid crystal display. The compound is represented by formula I shown in the description. In the formula I, R1 and R2 are respectively independently selected from the hydrogen atom and C1-15 alkyl or alkyloxy groups; A, B and C are respectively independently selected from groups also shown in the description; Z1 and Z2 are respectively independently selected from a single bond, -CH=CH-, a carbon-carbon triple bond, -COO-, -OOC-, -CF2O-, -OCH2-, -CH2O-, -OCF2-, -CH2CH2-, -CF2CH2-, -CH2CF2-, -C2F4-, -(CH2)4- and -CF=CF-; and a, b, c, d and e are respectively independently selected from 0, 1 and 2. The liquid crystal composition at least comprises the compound. The liquid crystal display includes the liquid crystal composition.

A liquid crystal composition contains one or more compounds represented by formula I, one or more compounds represented by formula II, one or more compounds represented by formula III, and one or morecompounds represented by formula IV. The liquid crystal 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 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.

The invention discloses a liquid-crystal compound containing a 1,4-dioxo-six-membered ring as well as a preparation method and an application thereof. The structure general formula of the compound is shown in a formula I. The compound has good thermal stability, so that when a right amount of liquid-crystal compound is used in optical elements, the relatively low threshold voltage can be realized; the liquid-crystal compound has fairly low rotary viscosity and very fast response speed, so that the liquid-crystal compound has very important practical significance for the preparation of a liquid-crystal mixture with the relatively low rotary viscosity. Therefore, the liquid-crystal compound is very suitable for application in the liquid-crystal mixture preparation. The liquid-crystal mixture containing the liquid-crystal compound can be applied to multiple displayers, is particularly suitable for TN-TFT and STN displayers and can be also used in IPS displayers.

The invention discloses a diphenylacetylene butene liquid crystal compound and a synthesis method thereof. The structural formula of the compound is shown as the specification, wherein (F)x and (F)y both represent fluorine atom substitution, x and y indicate the substitution number of fluorine atom, and can be 0 or 1, and R represents C1-C15 alkyl or C1-C15 alkoxy. The method provided by the invention employs acetal deprotection and Witting reaction to prepare the diphenylacetylene butene liquid crystal compound, the preparation method is simple in operation, the product yield and purity are high, and the obtained compound has the characteristics of low melting point, low viscosity, wide liquid crystal phase interval, good low temperature performance, direct preparation of liquid crystal mixture and the like, and is suitable for liquid crystal display, especially for TFT liquid crystal display technology.

The invention relates to a single-naphthalene-containing liquid crystal monomer compound, which belongs to the technical field of liquid crystal materials, and the structural formula of the liquid crystal monomeric compound is shown as follows: in the formula (1), R1, R2 and R3 are alkyl; and the X is any one of phenyl, biphenyl, benzene alkynyl and biphenyl alkynyl. The single-naphthalene-series-containing liquid crystal monomer compound is applied to a liquid crystal composition, and the single-naphthalene-series-containing liquid crystal monomer compound is applied to a liquid crystal display. The compound containing the single naphthalene series liquid crystal monomer is applied to a high-frequency technical component, and the high-frequency technical component is a liquid crystal-based antenna element, a phase shifter, a tunable optical filter or a tunable metamaterial structure. The single-naphthalene-containing liquid crystal compound has high birefringence and wide nematic phase temperature, and the clearing point of liquid crystal components can be improved. Meanwhile, the liquid crystal composition has large anisotropy and dielectric constant, and the performance of the liquid crystal composition can be improved.

The invention relates to the field of liquid crystal display, and particularly relates to a nematic liquid crystal composition containing a fluoroethoxy structure. The nematic liquid crystal composition contains at least one compound represented by a general formula I and at least one compound represented by a general formula II, wherein the compound represented by the formula I is a liquid crystal compound which is of a 2, 3-difluorobenzene structure, the compound has relatively great negative dielectric anisotropy and a high clearing point; and the compound represented by the formula II is abicyclic liquid crystal compound having 2, 3-difluoro-1, 4-phenyl, and a terminus is of a fluoroethoxy structure for greatly improving dielectric anisotropy of the liquid crystal compound. The liquidcrystal composition provided by the invention has low rotational viscosity, excellent low-temperature intersolubility and fast response, is suitable for VA-type liquid crystal display devices such asVA/MVA/PVA/PSVA as well as IPS and FFS mode liquid crystal display devices, and is very effective for improving the response time of liquid crystal displays.

The invention relates to a compound, a liquid crystal medium, a liquid crystal display element and a liquid crystal display. The structural formula of the compound is shown as a formula I in the specification. The compound can be used as a liquid crystal compound; and by using the compound, the clearing point of liquid crystal molecules is further improved on the basis of maintaining good rotary viscosity. Besides, the compound disclosed by the invention is used in a liquid crystal composition, and low-temperature intersolubility is good, so the working temperature range of the liquid crystalcomposition is wide.

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 relates to the field of liquid crystal display, in particular to a liquid crystal medium and application thereof. The liquid crystal medium at least contains a compound represented by ageneral formula I and at least one compound represented by at least one general formula II, wherein the compound represented by the general formula I is a three-ring compound with 2,3-difluorobenzenestructures; the structure has greater negative dielectric anisotropy and high clear points; the compound represented by the general formula II provided by the invention is a two ring compound with 2,3-difluorobenzene structures; the structure is the negative dielectric anisotropy liquid crystal compounds; the fluoro ethyoxyl structure is used as the tail end; the dielectric anisotropy of the liquid crystal compound is greatly improved. The liquid crystal medium provided by the invention has low rotary viscosity, good low-temperature mutual solubility and fast response time, is applicable to VAtype liquid crystal display devices such as VA/MVA/PVA/PSVA and IPS and FFS mode liquid crystal display devices; the medium is very effective on the improvement of the response time of the liquid crystal display. (The formulas are shown in the description.).

The invention relates to a liquid crystal composition comprising four compounds with different structural formulas and chiral compounds, wherein the four compounds with different structural formulas are at least one selected from a compound represented by a general formula I, at least one selected from a compound represented by a general formula II, at least one selected from a compound represented by a general formula III and at least one selected from a compound represented by a general formula IV respectively. By optimizing the content of each component in the liquid crystal composition, the clearing point is improved while the N-TB phase change point is reduced, the bistable liquid crystal dimming device prepared from the liquid crystal composition is provided, the working temperature range of the bistable liquid crystal dimming device is widened, and the value of the bistable liquid crystal dimming device in practical application is improved.

The invention provides a liquid crystal composition, which comprises at least one compound represented by a general formula I, at least one compound represented by a general formula N, at least one compound represented by a general formula II, and at least one compound represented by a general formula M. The invention also provides a liquid crystal display device containing the liquid crystal composition. The liquid crystal composition provided by the invention has properly high optical anisotropy, properly high clearing point, high transmittance, large average elastic constant, good low-temperature stability, high response speed and low rotary viscosity. When the liquid crystal composition is applied to an IPS liquid crystal display device, the transmittance of the display device can be effectively improved, so that the display device can have a good display effect.

The invention discloses compounds, liquid crystal composition and a liquid crystal display. The compounds are as shown in the formula I in the description, wherein R is at least one of hydrogen, vinyland C1-C10 alkyl independently, each group in the description is at least one of the following groups shown in the description, and X1, X2, X3, X4, X5, X6, X7, X8 and X9 are independently selected from H, F, Cl, CH3, CF3 and OCF3; m is selected from 0, 1, 2 or 3; n is selected from 0 or 1. The liquid crystal composition contains at least one of the compounds. The liquid crystal display is made ofthe liquid crystal composition.

The invention provides a liquid crystal compound shown in a general formula I, a liquid crystal composition containing the liquid crystal compound and a liquid crystal display device containing the liquid crystal composition. Compared with the prior art, the liquid crystal compound shown in the general formula I provided by the invention has a relatively large clearing point, relatively large optical anisotropy and a relatively large dielectric anisotropy absolute value under the condition of maintaining proper rotary viscosity, the liquid crystal composition containing the liquid crystal compound has a large clearing point, large optical anisotropy, a large dielectric anisotropy absolute value, a large elastic constant and a small ratio of the rotary viscosity to the spreadwise elastic constant under the condition that proper low-temperature storage stability and proper rotary viscosity are maintained, and the liquid crystal display device containing the liquid crystal composition has a wide nematic phase temperature range, a good contrast ratio, a low threshold voltage and short response time.

The invention provides a compound, a liquid crystal composition thereof and a liquid crystal display device. The compound is shown in a general formula I, and has a large clearing point, large optical anisotropy and a large dielectric anisotropy absolute value. The liquid crystal composition containing the compound has, under the condition of maintaining proper low-temperature storage time, a relatively large clearing point, relatively large optical anisotropy and a relatively large dielectric anisotropy absolute value, so that the liquid crystal display device containing the liquid crystal composition has a relatively wide temperature application range, relatively good contrast ratio and relatively low threshold voltage.