39results about How to "Suitable Dielectric Anisotropy" patented technology

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 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 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 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 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 provides an ultra-wide range temperature liquid crystal composition which comprises the following components by weight percent: 1-20 percent compound of general formula I, 10-60 percent of compound of general formula II, 5-30 percent of compound of general formula III, 10-50 percent of compound of general formula IV, and 1-25 percent of compound of general formula V. The liquid crystal composition has the advantages of extensive nematic-phase temperature range, superhigh clearing point, low melting point, lower rotary viscosity, suitable optical anisotropy, applicable dielectric anisotropy, higher response speed, favorable low-temperature storage stability, favorable UV resistance and thermal stability, can be used for outdoor and high-altitude liquid crystal display, also for environments where the temperature is high, and UV light radiation is strong, or the temperature is extremely low, including polar regions, high-altitude, plateau, tropical zones, deep sea area, or for special display field in similar harsh regions, and has favorable weatherability. The invention further provides a liquid crystal display comprising the liquid crystal composition.

The invention provides a liquid crystal composition and a liquid crystal display device. The liquid crystal composition is composed of at least one compound shown as the formula I, at least one compound shown as the formula II and at least one compound shown as the formula III, and through the cooperation of the three compounds, can achieve higher optical anisotropy and dielectric anisotropy, goodlow-temperature intersolubility, excellent electric resistivity and voltage retention rate under ultraviolet irradiation, thereby well solving the problem of image retention. Meanwhile, in the liquidcrystal composition, the polymerizable compounds can be more uniform and less prone to form large polymerized particles during polymerization and accordingly can avoid affecting display effects in the panel of the liquid crystal display device due to formation of light spots.

The invention discloses a polymer liquid-crystal composition. The polymer liquid-crystal composition comprises a first component, a second component and a third component, wherein the first component is selected from a group consisting of a general formula I-1, a general formula I-2 and a general formula I-3 as well as an assembly thereof; the second component is selected from a group consisting of a general formula II-1, a general formula II-2, a general formula II-3, a general formula II-4 as well as an assembly thereof; the third component is selected from a general formula III. The invention further discloses a liquid crystal display apparatus comprising the polymer liquid-crystal composition. The polymer liquid-crystal composition provided by the invention has proper refractive index anisotropy, proper dielectric anisotropy, a relatively wide nematic phase temperature range, a relatively high clearing point and relatively low RM residues, is stronger in anchoring effect of polymer RM, greatly reduces risk of bad display problems such as image ghost and uneven image display, and can be suitable for the liquid crystal display apparatus, so that the liquid crystal display apparatus has the characteristics such as good display at high temperature. The structural formula of I-1, I-2, I-3, II-1, II-2, II-3, II-4 and III are shown in the description.

The invention discloses a polymer liquid-crystal composition and a liquid crystal display apparatus comprising same. The polymer liquid-crystal composition comprises one or more compounds selected from a group consisting of a general formula I-1, a general formula I-2 and a general formula I-3 as well as an assembly thereof; one or more compounds selected from a group consisting of a general formula II-1, a general formula II-2, a general formula II-3, a general formula II-4 as well as an assembly thereof; one or more compounds selected from general formula III. The polymer liquid-crystal composition provided by the invention has proper refractive index anisotropy, proper dielectric anisotropy, a relatively wide nematic phase temperature range, a relatively high clearing point, relatively high response speed and good UV stability, can be applicable to a liquid crystal display, can meet the quick response needs of the liquid crystal display and good display needs under the UV condition, and obtains obvious technological progress. The structural formula of I-1, I-2, I-3, II-1, II-2, II-3, II-4 and III are shown in the description.

The invention provides a liquid crystal composition which comprises 1-20 wt% of compound disclosed as Formula I, 5-35 wt% of compound selected from Formula II-1, Formula II-2, Formula II-3 and combination thereof, 25-50 wt% of compound disclosed as Formula III, 5-25 wt% of compound composed of Formula IV-1, Formula IV-2 and combination thereof, and 5-25 wt% of compound composed of Formula V-1, Formula V-2 and combination thereof. The liquid crystal composition provided by the invention has the advantages of appropriate optical anisotropy, appropriate dielectric anisotropy, high response speed, high low-temperature storage stability, favorable ultraviolet irradiation resistance and favorable heat stability, and is suitable for IPS (in-plane switching), FFS (fringe field switching) and other display modes. The invention also provides a liquid crystal display device comprising the liquid crystal composition.

The invention provides a liquid crystal composition, which comprises at least a compound in a general formula I; at least a compound in a general formula II; and at least a compound selected from a general formula III-1, a general formula III-2, a general formula III-3, a general formula III-4 and its combination. The liquid crystal composition has characteristics of appropriate optical anisotropy, appropriate dielectric anisotropy and fast response speed. The invention also provides a liquid crystal display containing the liquid crystal composition.

The invention provides a liquid crystal composition. The composition comprises the following components: at least one compound with general formula I; at least one compound with general formula II andat least one compound with general formula III. The liquid crystal composition is provided with properly dielectric anisotropy, higher clearing point, higher optical anisotropy and good low temperature intersolubility, and other characteristics. Especially, the liquid crystal composition is provided with higher elastic constant. The invention also provides an application of the liquid crystal composition to liquid crystal displays, and the display has the advantages of fast response, high contrast, wide temperature width, and the like.

The invention relates to a liquid crystal composition and application thereof. The liquid crystal composition comprises at least one compound as shown in a general formula I, and at least one compound as shown in a general formula II-1 and/or at least one compound as shown in a general formula II-2, the liquid crystal composition provided by the invention can maintain VHR-initial and low-temperature storage performance at a stable level on the premise of proper optical anisotropy and dielectric anisotropy, relatively high clearing point, relatively low rotational viscosity and relatively high Kave value, and has remarkably lower conductivity I/V value and higher ion dissipation speed, the ghost shadow of a liquid crystal panel can be effectively improved, and the reliability is higher.

The invention discloses a liquid crystal composition and a liquid crystal display device thereof. The liquid crystal composition comprises at least a compound as a first component in a general formula I-1 and/or a formula I-2 as well as at least a compound in a general formula I-3; a compound as a second component in a general formula II; and at least a compound as a third component shown in a general formula III. The liquid crystal composition has characteristics of appropriate large refractive index anisotropy, appropriate dielectric anisotropy, high nematic phase temperature upper limit, and fast response speed. The liquid crystal composition can be used in the liquid crystal display device, and the liquid crystal display device has characteristic of short response time.