40 results about "Rotational viscosity" patented technology

The present invention provides a liquid crystal composition and a liquid crystal display device. The liquid crystal composition comprises at least one compound of general formula I and at least one compound selected from compounds of general formula II-1 and / or general formula II-2. The liquid crystal composition provided in the present invention has an appropriate optical anisotropy, an appropriate clearing point, a lower rotational viscosity, a higher Kave value and a higher ε⊥ / Δε ratio, and has higher transmittance and contrast rate, and a remarkable low-temperature storage performance at the same time.

The invention relates to a novel liquid crystal material and application thereof, a double five-membered heteroaromatic ring is used as a core structure unit of a liquid crystal molecule, so that the liquid crystal material keeps high dielectric anisotropy, and meanwhile, the rotary viscosity of the liquid crystal molecule is remarkably reduced. A polar substituent group is introduced at the tail end of a molecule, so that the electro-optical performance is further optimized, particularly, the dimming contrast ratio and the response speed are obviously improved, and the compound also has excellent damp-heat stability and can meet the requirements of application scenes such as large-area intelligent dimming windows and vehicle-mounted anti-dazzle rearview mirrors. The liquid crystal material provided by the invention not only provides excellent electro-optical performance, but also has low-voltage driving, high dimming contrast and excellent environmental stability, provides an innovative material solution for a next-generation high-speed and low-power-consumption liquid crystal display device, and has wide application prospects and good industrialization potential.

The present application provides a liquid crystal composition and a liquid crystal display device thereof. The liquid crystal composition of the present application comprises at least one compound of general formula O and at least one compound of general formula B. The liquid crystal composition of the present application has smaller polymer residue, smaller roughness, better low-temperature storage stability, smaller contact angle, better alignment effect, and better pre-tilt angle stability under the condition of maintaining proper clearing point, proper optical anisotropy, proper absolute value of dielectric anisotropy, larger K value (K 11 and K 33 ) and smaller rotational viscosity, so that the liquid crystal display device comprising the same has proper threshold voltage, better contrast, better response speed, can effectively improve the problems such as "image sticking", display unevenness, "broken bright spot" and the like existing in the existing PSA type liquid crystal display, and has higher practical application value.

The present invention provides a liquid crystal composition and a liquid crystal display device. The liquid crystal composition comprises at least one compound of general formula I and at least one compound selected from compounds of general formula II-1 and / or general formula II-2. The liquid crystal composition provided in the present invention has an appropriate optical anisotropy, an appropriate clearing point, a lower rotational viscosity, a higher Kave value and a higher ε⊥ / Δε ratio, and has higher transmittance and contrast rate, and a remarkable low-temperature storage performance at the same time.

The invention provides a liquid crystal compound containing a polyfluoro substituent group, a composition and application of the liquid crystal compound. The liquid crystal compound disclosed by the invention has a structure as shown in a formula I, and has relatively high negative dielectric anisotropy, good liquid crystal intersolubility and relatively low rotary viscosity. Formula I

The present invention provides a self-aligning agent and a liquid crystal composition thereof. The liquid crystal composition comprising the self aligning agent of general formula O in the present invention has a lower residue concentration, a smaller roughness, a better alignment effect as well as a better low-temperature storage stability and a better pre-tilt angle stability while maintaining an appropriate clearing point, an appropriate optical anisotropy, an appropriate absolute value of dielectric anisotropy, a larger K value (K11 and K33) and a smaller rotational viscosity.

The invention relates to the technical field of liquid crystal materials, and particularly discloses a liquid crystal composition and a liquid crystal display component. The liquid crystal composition provided by the invention comprises a negative compound as shown in the formula I and a positive compound with dielectric anisotropy greater than 2, has proper refractive index anisotropy and dielectric anisotropy and higher transmittance, particularly has excellent low-temperature (-45 DEG C) storage performance and high and low-temperature change rate, can be used in a wider temperature range, and can be applied to the field of liquid crystal display devices. Compared with the prior art, the liquid crystal composition has the advantages that the liquid crystal composition can quickly respond even at a low temperature, meanwhile, the high-low temperature change rate of the liquid crystal composition is better improved through the synergistic effect of the compounds, the operating voltage change amplitude at a low temperature and the rotary viscosity change amplitude at a low temperature are reduced, and excellent reliability can be kept at a high temperature or under long-time illumination. The liquid crystal composition disclosed by the invention can be used for developing a wide-temperature liquid crystal display with high reliability and high transmittance, and is particularly suitable for displays in IPS, FFS, TN and ECB modes. I

The application provides a liquid crystal compound and application thereof. The liquid crystal compound has a structure as shown in formula I. The liquid crystal compound has excellent characteristics such as high dielectric anisotropy, good liquid crystal mutual solubility, low rotational viscosity and the like, and can be used to improve the performance of a liquid crystal material. Formula I

The application provides a negative liquid crystal composition and application thereof, and belongs to the technical field of liquid crystal materials. The negative liquid crystal composition comprises at least one compound represented by a general formula I, at least one compound represented by a general formula II, at least one compound represented by a general formula III, at least one compound represented by a general formula IV and at least one compound represented by a general formula V. The negative liquid crystal composition provided by the application has low rotational viscosity, large elastic constant, small optical dispersion, good low-temperature mutual solubility, relatively high transmittance and fast response speed, can be used for fast response liquid crystal display of various display modes, improves the transmittance and contrast ratio, and is especially suitable for IPS and FFS mode liquid crystal displays.

A liquid crystal composition includes at least one biphenyl or terphenyl compound and at least one compound represented by formula II. The liquid crystal composition has a relatively large absolute value of dielectric anisotropy, a relatively large K value, a relatively long low-temperature storage time period, a relatively low polymer layer surface roughness, a relatively small pre-tilt angle, a relatively fast speed for forming pre-tilt angle, a relatively low polymer residue, a relatively high VHR and a relatively good pre-tilt angle stability, while maintaining appropriate clearing points, optical anisotropy and rotational viscosity. A liquid crystal display device containing the liquid crystal composition has a relatively wide temperature usage range, relatively good contrast, and relatively good low-temperature mutual solubility. In addition, the production process of PSA-type liquid crystal displays is improved, and at the same time, the problems of “image sticking”, uneven display and “broken bright spots”.

This invention provides a liquid crystal compound, a composition, and their applications. The liquid crystal compound has the structure shown in Formula I. The liquid crystal compound and composition of this invention have advantages such as low rotational viscosity, high dielectric anisotropy, good miscibility, and stable performance, and also have the effect of reducing device driving voltage.

The invention discloses a diphenylacetylene liquid crystal compound containing a difluoroethylene terminal group and a composition of the diphenylacetylene liquid crystal compound, the structure of the liquid crystal compound is shown as a general formula I, R1 is one of alkyl and alkoxy with the carbon atom number of 1-10 and alkenyl or alkenyloxy with the carbon atom number of 2-10, and hydrogen on the carbon atom can be substituted by fluorine; and X1, X2 and X3 are one of H, F, Cl,-CH3,-C2H5,-CF3 or-OCF3. The liquid crystal composition comprises a liquid crystal compound with a structure shown in a general formula I. The diphenylacetylene liquid crystal compound containing the difluoroethylene end group has the advantages of low melting point, wide nematic liquid crystal range, high birefringence, low rotary viscosity and high dielectric adjustability, and is especially suitable for microwave antennas, liquid crystal THz optical devices and the like.

A liquid crystal composition includes at least one compound represented by formula I and at least one compound represented by formula II. The liquid crystal composition has a relatively large absolute value of dielectric anisotropy, a relatively large K value, a relatively long low-temperature storage time period, a relatively low polymer layer surface roughness, a relatively small pre-tilt angle, a relatively fast speed for forming pre-tilt angle, a relatively low polymer residue, a relatively high VHR and a relatively good pre-tilt angle stability, while maintaining appropriate clearing points, optical anisotropy and rotational viscosity. A liquid crystal display device containing the liquid crystal composition has a relatively wide temperature usage range, relatively good contrast, and relatively good low-temperature mutual solubility. In addition, the production process of PSA-type liquid crystal displays is improved, and at the same time, the problems of “image sticking”, uneven display and “broken bright spots”.

A liquid crystal composition and a use thereof. The liquid crystal composition comprises at least one compound of general formula I, at least one compound of general formula II, at least one compound of general formula III, and at least one compound of general formula IV, and can also comprise at least one compound of general formula V. The liquid crystal composition exhibits low rotational viscosity, large elastic constant, large optical anisotropy, good low-temperature intersolubility and fast response speed, and can be used in VA, IPS or FFS-mode liquid crystal displays.

This invention relates to the field of liquid crystal display technology, and more particularly to a liquid crystal composition and its application. The liquid crystal composition provided by this invention contains a diacetyl group compound, which, while exhibiting low light dispersion and high transmittance, also possesses excellent properties such as low rotational viscosity, high elastic constant, good low-temperature miscibility, and fast response speed. It can be used in fast-response liquid crystal displays of various display modes, and can significantly improve the display effect of liquid crystal displays when applied to VA, IPS, or FFS mode displays, especially suitable for IPS and FFS mode liquid crystal displays.

The utility model discloses a kind of temperature-variable rotary viscosity testers, including base, instrument body and rotor, machine base is provided on the top of base, heating cavity is provided on machine base;Instrument body is located above machine base, the front of instrument body is provided with touch screen, inside is provided with motor and control module, the lower end of instrument body is provided with the rotor connector connected with motor driving end;The lower of instrument body is provided with the rotor of detachable connection with rotor connector, temperature measuring head is arranged on the side of the rotor of instrument body;Instrument body is connected with base by lifting rotary adjusting mechanism, tank is provided in heating cavity, heating assembly is arranged between heating cavity and tank;Tank and heating cavity are detachably connected.The utility model can automatically and continuously test measured fluid at different temperatures, with heating efficient and uniform, good heat preservation effect, wide testable temperature range, accurate viscosity test and easy to operate, etc. Characteristics, suitable for the viscosity test of high-temperature molten body.

A liquid crystal composition includes at least one compound of general formula I, at least one compound of general formula II and at least one compound of general formula III. The liquid crystal composition has a suitable optical anisotropy, a suitable clearing point, a suitable dielectric anisotropy absolute value, a large K value, a low rotational viscosity, a short response time, a high transmittance, a high contrast and a long low-temperature storage time. A liquid crystal display device having the liquid crystal composition has excellent performance and is suitable for fast response, high-contrast VA, IPS, NFFS and other display modes.

The present disclosure relates to a liquid crystal composition and the use thereof. The liquid crystal composition comprises one or more compounds having a structure represented by general formula I, one or more compounds having a structure represented by general formula II, one or more compounds having a structure represented by general formula III, and one or more compounds having a structure represented by general formula IV. The liquid crystal composition has low rotary viscosity, a large elastic constant, high optical anisotropy, good low-temperature intersolubility and a fast response speed, and can be used for fast-response liquid crystal display in multiple display modes. The use of the liquid crystal composition in a VA, IPS or FFS mode display can significantly improve the display effect of the liquid crystal display, and the liquid crystal composition is particularly suitable for IPS and FFS mode liquid crystal displays.

The present invention provides a liquid crystal composition and a liquid crystal display device. The liquid crystal composition comprises at least one compound of general formula I and at least one compound selected from compounds of general formula II-1 and / or compounds of general formula II-2. The liquid crystal composition according to the present invention has suitable optical anisotropy, a suitable clearing point, low rotational viscosity, high K ave value and high ε ⊥ / Δε ratio, and has high transmittance and contrast, as well as excellent low-temperature storage properties.

The invention discloses a liquid crystal compound, a liquid crystal composition, a liquid crystal display element and a liquid crystal display. The liquid crystal compound is selected from a compound shown in a formula I, and in the formula I, X represents-O-or-S-; r2 represents a chain alkyl group with the carbon atom number of 1-10; and R3 represents H or chain alkyl with the carbon atom number of 1-10. The liquid crystal compound has an appropriate clearing point and dielectric anisotropy, especially has a relatively small elastic constant and rotary viscosity, and also has a relatively small ratio of the elastic constant to an absolute value of the dielectric anisotropy, a relatively small ratio of the rotary viscosity to the elastic constant and good low-temperature performance; the liquid crystal composition containing the liquid crystal compound also has a proper clearing point, proper dielectric anisotropy, a relatively small ratio of an elastic constant to an absolute value of dielectric anisotropy, a relatively small ratio of rotary viscosity to the elastic constant and good low-temperature performance; and the method can be used for developing a wide-temperature display with relatively high response speed, low power consumption and the like. I

The invention relates to the technical field of liquid crystal display, in particular to a liquid crystal composition containing high-reliability thiophene monomers and application of the liquid crystal composition, the liquid crystal composition comprises a deuterated thiophene compound, has low rotary viscosity and large elastic constant, has excellent reliability, and can be applied to liquid crystal display. The response speed of the liquid crystal display can be obviously improved, and the occurrence probability of the afterimage problem in a panel can be effectively reduced.

The invention provides a liquid crystal compound and application thereof. The liquid crystal compound disclosed by the invention has a structure as shown in a formula I, has relatively high dielectric anisotropy, good liquid crystal intersolubility and proper rotary viscosity, and can be used for improving the performance of a liquid crystal material. Formula I

The present invention provides a liquid crystal composition and a liquid crystal display device. The liquid crystal composition comprises at least one compound of general formula I, at least one compound of general formula II and at least one compound of general formula III. The liquid crystal composition provided in the present invention has an appropriate optical anisotropy, an appropriate clearing point, an appropriate absolute value of dielectric anisotropy, a larger K value, a smaller rotational viscosity, a shorter response time, a higher transmittance, a higher contrast rate and a longer low-temperature storage time, and a liquid crystal display device prepared thereby has excellent performances and is suitable for fast-response, high-contrast VA, IPS, NFFS display modes and the like.

This invention provides a liquid crystal composition comprising 40%–70% component I, 0%–20% component II, 0%–20% component III, 5%–40% component IV, and 0%–30% component V. This liquid crystal composition exhibits a high clearing point and low rotational viscosity, which is beneficial for increasing the operating temperature range of the liquid crystal material and improving its response speed.

The application provides a negative liquid crystal composition and application thereof, and belongs to the technical field of liquid crystal materials. The negative liquid crystal composition comprises at least one compound represented by general formula I, at least one compound represented by general formula II and at least one compound represented by general formula III. The negative liquid crystal composition provided by the application has low rotational viscosity, large elastic constant, large optical anisotropy, good low-temperature mutual solubility and fast response speed, can effectively improve the contrast ratio of a liquid crystal display, simultaneously takes into account the response speed of the liquid crystal display, and can obviously improve the display effect of the liquid crystal display in a VA, IPS or FFS mode display.

The embodiment of the present application discloses a liquid crystal composition and a display panel, the liquid crystal composition comprises at least one first compound represented by general formula (I), at least one second compound selected from general formula (II) and at least one third compound selected from general formula (III-1) to general formula (III-3), the present application improves the performance of the liquid crystal composition in the aspects of clearing point, rotational viscosity, dielectric anisotropy and optical anisotropy by adding the first compound, the second compound and the third compound in the liquid crystal composition, thereby improving the display effect and product quality of the display panel using the liquid crystal composition.

The present invention provides a liquid crystal composition and a liquid crystal display device. The liquid crystal composition includes at least one compound represented by general formula I, at least one compound represented by general formula II, and at least one compound represented by general formula III. The liquid crystal composition according to the present invention has suitable optical anisotropy, a suitable clearing point, a suitable absolute value of dielectric anisotropy, a large K value, a small rotational viscosity, a short response time, high transmittance, high contrast, and a long low-temperature storage time. The liquid crystal display device manufactured using the composition has excellent performance, a fast response, and a high contrast, and is applicable to display modes such as VA, IPS, and NFFS.

The present application provides a liquid crystal composition and a display panel, the liquid crystal composition comprises at least one compound represented by formula (1), at least one compound represented by formula (2), at least one compound represented by formula (3), at least one compound represented by formula (4), at least one compound represented by formula (5), at least one compound represented by formula (6), and at least one compound represented by formula (7), the liquid crystal composition is obtained by designing the structure of liquid crystal molecules and combining liquid crystal molecules with different structures, experiments prove that the liquid crystal composition has low rotational viscosity, high dielectric anisotropy, high thermal stability and suitable optical anisotropy, so that the liquid crystal composition can be applied to the liquid crystal layer material of the display panel.

This invention provides a liquid crystal composition, a liquid crystal display device comprising the same, and their applications. The liquid crystal composition of this invention comprises at least one compound of general formula I, at least one compound of general formula F, at least one compound of general formula M, and at least one compound of general formula N. In the liquid crystal composition of this invention, through the specific structure and content of the compounds, it maintains appropriate dielectric anisotropy, good optical anisotropy, and good clearing point, while possessing a large elastic constant, high transmittance, low rotational viscosity, fast low-temperature response speed, and good low-temperature storage stability. This results in liquid crystal display devices comprising the same having fast response speeds and high contrast ratios, and can be applied to fast-response display modes such as VA, IPS, and NFFS.