188results about How to "Appropriate optical anisotropy" patented technology

The invention disclosed a liquid crystal composition, which contains one or a plurality of compounds represented by a formula I-a and/or I-b, one or a plurality of compounds represented by a formula II, and one or a plurality of compounds represented by a formula III, wherein the formulas I-a, I-b, II and III are defined in the specification. A purpose of the present invention is to provide a liquid crystal composition and a liquid crystal display element or a liquid crystal display device containing the liquid crystal composition. According to the present invention, the liquid crystal composition has low viscosity, can achieve fast response, and further has moderate dielectric anisotropy delta[epsilon], moderate optical anisotropy delta[n], high thermal stability and high light stability;and the liquid crystal display element or the liquid crystal display device containing the liquid crystal composition has advantages of wide nematic phase temperature range, suitable birefringence anisotropy, high resistivity, good ultraviolet resistance, high charge retention, low vapor pressure and the like.

The invention provides a novel polymerizable liquid crystal composition comprising a first component of at least one compound represented by the general formula I, a second component of at least one compound represented by the general formula II, a third component of at least one compound represented by the general formula III, and a fourth component of at least one compound represented by the general formula IV. According to the polymerizable liquid crystal composition, polymerization speed can be controlled, polymeric compound residue can be reduced, and problems such as after-image, image display unevenness, low-temperature crystallization, and the like can be greatly reduced. The composition also has good anti-ultraviolet stability, good low-temperature storage performance, relatively high clearing point, appropriate optical anisotropy, and appropriate dielectric anisotropy. The invention also provides a liquid crystal display device comprising the polymerizable liquid crystal composition.

The invention discloses a liquid crystal compound containing difluoro-methylene key bridge, a preparation method of the liquid crystal compound containing difluoro-methylene key bridge and a composition containing the liquid crystal compound. The liquid crystal compound is a compound shown in a general formula I; and the liquid crystal compound comprises 5-95wt% of a first compound shown in a general formula I, 1-50wt% of a second compound shown in a general formula II and 5-50 percent of a third component shown in a general formula III. The liquid crystal compound has large negative dielectric anisotropy, and is low in viscosity, wide in nematic phase temperature range and high in intermiscibility, uvioresistant performance and high-temperature resistant performance; and the liquid crystal composition containing the liquid crystal compound is high in low-temperature intersolubility, quick in response time, large in optical anisotropy and dielectric anisotropy and low in driving voltage, and can be well suitable for vertical alignment (VA)-type liquid crystal display elements.

The invention discloses a liquid crystal composition which contains compounds shown in formulae I and II and also can contain one or more compounds shown in formula II-B, wherein the definitions of all substituents are given. The composition disclosed by the invention has low viscosity gamma 1, moderate dielectric anisotropy delta epsilon and moderate optical anisotropy delta n and can realize quick response of liquid crystal display.

The invention provides a novel polymerizable liquid crystal composition comprising a first component of at least one compound represented by the general formula I, a second component of at least one compound represented by the general formula II, a third component of at least one compound represented by the general formula III, and a fourth component of at least one compound represented by the general formula IV. According to the polymerizable liquid crystal composition, polymerization speed can be controlled, polymeric compound residues can be reduced, and risks of causing poor display problems such as after-images and image display unevenness can be greatly reduced. The invention also provides a liquid crystal display device comprising the polymerizable liquid crystal composition.

The invention discloses a quick-response liquid crystal composition which comprises 1-80% of component A composed of dielectric positive compounds disclosed as general formula I and general formula II, 1-80% of component B disclosed as general formula III, 1-80% of component C disclosed as general formula IV, 0-30% of component D disclosed as general formula V, and component E disclosed as general formula VI. Besides, an optical rotation compound, which accounts for 0-1.0 wt% of the liquid crystal composition, is also added. The quick-response liquid crystal composition disclosed by the invention has the advantages of moderately high positive dielectric anisotropy, wide nematic phase range, very high charge retentivity, low power consumption, low rotary viscosity, quick response time and appropriate optical anisotropy, is suitable for active matrix and passive matrix electro-optic elements and liquid crystal displays, and can be used for manufacturing quick-response TFT-LCDs (thin film transistor-liquid crystal displays).

The invention discloses a liquid crystal composition and an application thereof. The liquid crystal composition comprises at least one compound of formula I, and at least one compound of formula II. The liquid crystal composition provided by the present invention has suitable optical anisotropy and has a relatively large elastic constants K11 and K33 while a relatively high clearing point, relatively low dielectric anisotropy, and good low-temperature mutual solubility are maintained. When the liquid crystal composition is applied to a liquid crystal display, the liquid crystal composition canhave the advantages of fast response, high contrast, large temperature width and the like.

The present invention discloses a liquid crystal composition having rapid response, wherein the liquid crystal composition comprises one or a plurality of compounds represented by a general formula I, one or a plurality of compounds represented by a general formula II, one or a plurality of compounds represented by general formulas III-1, III-2 and III-3 or a composition of the compounds represented by general formulas III-1, III-2 and III-3. According to the present invention, the liquid crystal composition has characteristics of suitable optical anisotropy, suitable dielectric anisotropy, high clearing point, rapid response, wide work temperature range and the like, and can be used for liquid crystal displays, particularly the liquid crystal display having the rapid response requirement.

The invention provides a liquid crystal composition and an application thereof. The liquid crystal composition comprises a compound which is 1-50% of the total weight of the liquid crystal composition and is shown as a formula (I), a compound which is 1-60% of the total weight of the liquid crystal composition and is shown as a formula (II) and a compound which is 20-90% of the total weight of the liquid crystal composition and is shown as a formula (III). The liquid crystal composition has a low rotary viscosity and a relatively high responding speed. The invention further provides a liquid crystal display containing the liquid crystal composition.

The invention provides a liquid crystal composition which comprises at least one compound disclosed as general formula I as a first component, at least one compound disclosed as general formula II as a second component, at least one compound disclosed as general formula III as a third component, and at least one compound disclosed as general formula IV as a fourth component. The liquid crystal composition can control the polymerization rate, lower the polymer compound residues and greatly reduce the risks of display defectiveness problems, such as image ghost, nonuniform image display and the like. The invention also provides a liquid crystal display device comprising the liquid crystal composition.

The invention discloses a negative dielectric anisotropy liquid crystal monomer represented by a general formula I and liquid crystal medium containing such monomers. The liquid crystal medium includes one or more types of compounds represented by the general formula I and one or more types of compounds represented by a general formula II. The liquid crystal composition provided by the invention is excellent in performance, has proper negative dielectric anisotropy, proper optical anisotropy, and a relatively large K value, and can be used for active matrix display elements containing the liquid crystal medium, such as active matrix displays with an ECB, FFS or IPS, MVA, PVA or HVA effect. (The general formulas I and II are shown in the description.

The invention provides a liquid crystal composition which has negative dielectric anisotropy. The liquid crystal composition comprises a compound of a general formula I accounting for 1-30% of the total weight of the liquid crystal composition, and 15-70% of a compound of a general formula II-1 and/or II-2, and 10-55% of a compound of free general formula III. The liquid crystal composition provided by the invention can be used for a liquid crystal element, and has properties of low viscosity, high response speed, excellent low-temperature reliability and the like. The liquid crystal composition provided by the invention is especially suitable for liquid crystal displays such as VA, PSVA (Polymer Stabilize Vertical Align), PS-IPS and the like. The invention also provides a liquid crystal display comprising the liquid crystal composition.

The invention discloses a liquid crystal compound having dielectric anisotropy. The structure of the compound is as shown in a formula I. The negative liquid crystal compound has negative dielectric anisotropy with a large absolute value, high reliability and relatively low viscosity, is good in intermiscibility with other liquid crystal components, and can be widely suitable for a liquid crystal display device. A liquid crystal composition comprising the compound can be applied to a liquid crystal display.

The invention discloses a quick-response nematic phase type liquid crystal composite. The liquid crystal composite comprises 1%-40% (mass percentage) of liquid crystal compound as shown in structural formula I, 5%-70% (mass percentage) of liquid crystal compound as shown in structural formula II, 5%-50% (mass percentage) of liquid crystal compound as shown in structural formula III, 0%-40% (mass percentage) of liquid crystal compound as shown in structural formula IV, and 0%-40% (mass percentage) of liquid crystal compound as shown in structural formula V; the sum of mass percentages of the liquid crystal compounds respectively as shown in structural formulae I, II, III, IV and V is 100%; moreover, an optically active compound occupying 0%-0.5% of the sum of mass of the liquid crystal composite is also added. The composite has low rotary viscosity, quick response speed and proper positive dielectric anisotropy, and is especially suitable for manufacturing quick-response active matrix TN-TFT and IPS-TFT liquid crystal display elements and liquid crystal displayers.

The invention discloses a liquid crystal composition. The liquid crystal composition comprises one or more compounds as shown in formula I and one or more compounds as shown in formula II; and the liquid crystal composition comprises a compound as shown in II-A: FORMULA as shown in the specification, wherein each substituent group is defined. The composition provided by the invention has low viscosity gamma 1, moderate dielectric anisotropy delta epsilon and moderate optical anisotropy delta n, and can realize quick response of liquid crystal display.