21results about How to "Low rotational viscosity" patented technology

The invention relates to the technical field of liquid crystal display materials, in particular to a liquid crystal compound and a preparation method and application thereof, and the liquid crystal compound has a structure as shown in a general formula I: # imgabs0 # (I). The liquid crystal compound with the specific structure has the advantages of high dielectric anisotropy, good liquid crystal intersolubility and the like, the dielectric anisotropy epsilon of the liquid crystal composition can be remarkably improved when the liquid crystal compound is specifically applied to the liquid crystal composition, meanwhile, proper refractive index anisotropy n is kept, and the liquid crystal composition can be applied to the liquid crystal composition. The obtained liquid crystal composition has the remarkable characteristics of quick response and low-voltage driving.

The invention relates to the technical field of liquid crystal materials, in particular to a liquid crystal composition and application thereof.The liquid crystal composition comprises one or more compounds with the structure shown in the general formula I, one or more compounds with the structure shown in the general formula II and one or more compounds with the structure shown in the general formula III, and one or more compounds with structures as shown in a general formula IV. The liquid crystal composition provided by the invention has the excellent properties of low rotary viscosity, large elastic constant, large optical anisotropy, high response speed, good low-temperature intersolubility and the like, can effectively improve the response speed of a liquid crystal display, and can be used for fast-response liquid crystal display of multiple display modes; when the liquid crystal composition is used in a VA, IPS or FFS mode display, the display effect of a liquid crystal display can be obviously improved, and the liquid crystal composition is particularly suitable for IPS and FFS mode liquid crystal displays.

The present invention relates to a dielectric negative liquid crystal composition and a display device thereof, belonging to the field of liquid crystal materials. The liquid crystal composition comprises at least one dielectric negative compound represented by general formula I: at least one compound represented by general formula F: at least one dielectric negative compound M, compound M is selected from the compounds represented by the following general formula M: and at least one compound represented by general formula III: The liquid crystal composition of the present invention has a large ε ∥ , thus having a larger liquid crystal capacitance, and also having a larger ε ⊥ , with a higher ε ⊥ / |Δε| ratio, having high transmittance and contrast. The prepared PSVA mixture has good pre-tilt angle forming ability, and the formed pre-tilt angle has good stability. At the same time, the liquid crystal composition of the present invention has good low-temperature storage stability and low rotational viscosity, and can reduce the response time of the liquid crystal display.

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 invention discloses a liquid crystal composition with low viscosity and high birefringence. The liquid crystal composition disclosed by the invention comprises 60-100% by mass of a compound as shown in a general formula I as a first component. In a further scheme, the compound also comprises the following components in percentage by mass: 0-30% of a compound as shown in a structural general formula II, 0-30% of a compound as shown in a structural general formula III or / and 0-30% of a compound as shown in a structural general formula IV. According to the liquid crystal composition, the birefringence is larger than 0.39 at the temperature of 25 DEG C and the wavelength of 589 nm, and the rotary viscosity is smaller than 180 mPa.s. The liquid crystal compound has the advantages of low viscosity, high birefringence, low viscoelastic coefficient and wide nematic phase temperature interval. # imgabs0 #

The subject of the present invention is to provide a liquid crystal composition having a liquid crystal phase in a wide temperature range, high refractive index anisotropy, high absolute value of dielectric constant anisotropy, low viscosity or rotational viscosity, good solubility at low temperature, high resistivity and voltage holding rate, thermal and light stability, and negative Δε; further, by using the liquid crystal composition, a high-speed response liquid crystal display element such as VA type and PSVA type with excellent display quality and less prone to display defects such as drip marks and line afterimages is provided. The inventors have studied various liquid crystal compounds and various chemical substances and found that by combining specific compounds, the aforementioned problems can be solved and a liquid crystal display element using the liquid crystal composition can be provided.

The present invention provides a liquid crystal composition and a liquid crystal display device comprising the same, wherein the liquid crystal composition comprises at least one compound of formula I and at least one compound of formula II. Through the selection and compounding of components, the liquid crystal composition has a higher clearing point, appropriate optical anisotropy, appropriate dielectric anisotropy, lower rotational viscosity, a larger elastic constant K value, a shorter response time and a faster response speed, a smaller dark state transmittance, a larger bright state transmittance and a higher contrast, so that the liquid crystal display device comprising the same has a better contrast, a higher transmittance, a faster response speed, a shorter refresh time and a wider operating temperature range, which helps to significantly improve the display effect of the liquid crystal display and is suitable for display modes such as VA, PSVA, IPS, and NFFS.

The invention relates to a dielectric positive liquid crystal composition and application thereof, and belongs to the field of liquid crystal materials. The dielectric positive liquid crystal composition comprises at least one compound with a structure as shown in a general formula I: # imgabs0 #, at least one compound as shown in a general formula F: # imgabs1 #, at least one compound as shown in a general formula N: # imgabs2 # and at least one compound as shown in a general formula D: # imgabs3 #. The liquid crystal composition provided by the invention has the advantages of larger Kave, large refractive index, quick response, high penetration rate and the like; the liquid crystal display device containing the liquid crystal composition has the advantages of high response speed, high contrast ratio and high transmittance. According to the liquid crystal composition, the compound shown in the general formula I is added, so that the liquid crystal composition has higher optical anisotropy and higher average elastic constant, the technical effect of effectively adjusting the transmittance can be realized, and a liquid crystal display device obtains relatively less light scattering; therefore, the liquid crystal display device using the liquid crystal composition can obtain a good display effect.

The present invention provides a liquid crystal composition and a liquid crystal display device comprising the same, wherein the liquid crystal composition comprises at least one compound of formula I, at least one compound of formula II and at least one compound of formula III. By selecting and compounding the components, the liquid crystal composition has a suitable clearing point and a suitable dielectric anisotropy, and also has a larger optical anisotropy and a larger average elastic constant K ave , higher vertical dielectric to dielectric ratio, lower rotational viscosity γ1, higher transmittance and contrast, longer low-temperature storage time and better low-temperature storage stability, faster response speed of liquid crystal materials, suitable for fast-response IPS, TN, VA, NFFS and other display modes.

The present invention relates to a liquid crystal composition and a display device thereof, and belongs to the field of liquid crystal materials. The liquid crystal composition comprises at least one dielectric negative compound M, and the compound M is selected from compounds represented by the general formula M-I and / or M-II: at least one compound represented by the general formula G: at least one compound represented by the general formula I: and at least one compound represented by the general formula P: The liquid crystal composition of the present invention has large vertical dielectric and parallel dielectric of the liquid crystal, high storage capacitance, and high transmittance and contrast. The PSVA mixture prepared by the present invention has good pre-tilt angle forming ability, and the liquid crystal composition of the present invention has good low-temperature storage stability, low rotational viscosity, and can reduce the response time of the liquid crystal display.

The present invention provides a liquid crystal composition and a liquid crystal display device comprising the same, wherein the liquid crystal composition comprises at least one compound of general formula F, at least one compound of general formula I and at least one compound of general formula II. The liquid crystal composition of the present invention has a smaller rotational viscosity and a higher VHR (UV) while maintaining an appropriate clearing point, an appropriate optical anisotropy, an appropriate absolute value of dielectric anisotropy and an appropriate VHR (initial), so that the liquid crystal display device comprising the same has a faster response speed, better low temperature stability and higher reliability.

The present invention relates to a polymerizable liquid crystal composition and a display device thereof, and belongs to the field of liquid crystal materials. The polymerizable liquid crystal composition comprises at least one compound having a structure shown in general formula I: at least one compound shown in general formula P: at least one compound shown in general formula II: at least one compound shown in general formula III: and at least one compound shown in general formula M, wherein compound M is selected from compounds represented by general formula M-I and / or M-II: The liquid crystal composition of the present invention has very low rotational viscosity, good phase performance and good low-temperature performance, and can form a lower pretilt angle after UV irradiation, has less RM residue, lower threshold voltage and faster response time, and the formed pretilt angle has long-term stability under high and low temperature conditions, and can meet the requirements of liquid crystal display devices for low power consumption and good display effect.

This invention provides a liquid crystal composition, a liquid crystal display device comprising the same, and applications thereof. 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 and high transmittance; thus, the liquid crystal display device comprising the same has a fast response speed and a high contrast ratio; the liquid crystal composition of this invention is suitable for application in fast-response display modes such as VA, PSVA, IPS, and NFFS.

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 discloses a liquid crystal compound containing 2, 5-difluorobenzyne, a synthesis method and a liquid crystal composition. The structure of the liquid crystal compound containing 2, 5-difluorobenzyne is shown as a formula I in the specification. The invention further discloses a liquid crystal composition with the structure shown in the general formula I. According to the liquid crystal compound disclosed by the invention, after two fluorine substituents are introduced into a specific position of a benzene ring, the liquid crystal compound has remarkably improved liquid crystal phase transition temperature characteristics, such as the characteristics of wide nematic phase liquid crystal temperature region, low melting point and high clearing point; the low-temperature intermiscibility is better, and the rotary viscosity is low; in addition, the low dielectric loss characteristic and the large dielectric anisotropy are achieved at the high frequency; meanwhile, the high birefringence is also realized. The method is suitable for preparing devices such as microwave antennas and liquid crystal optical devices. # imgabs0 #

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 present invention discloses a liquid crystal composition with negative dielectric anisotropy and its application, wherein the liquid crystal composition with negative dielectric anisotropy comprises at least one compound represented by general formula I, at least one compound represented by general formula M, and at least one compound represented by general formula C. The present invention has the following beneficial effects: the liquid crystal composition containing a tetracyclic terminal olefin compound has a lower rotational viscosity, can achieve a fast response, and has a larger elastic constant, good low-temperature mutual solubility and moderate optical anisotropy, can adapt to different cell thickness designs, and obtain a good display effect.

The present invention relates to a dielectric negative liquid crystal composition and a display device thereof, and belongs to the field of liquid crystal materials. The liquid crystal composition comprises at least one dielectric negative compound represented by general formula I: at least one dielectric negative compound represented by general formula M: at least one compound represented by general formula G: and at least one compound represented by general formula II: The liquid crystal composition of the present invention has a large vertical dielectric constant and a large parallel dielectric constant, high storage capacitance, good transmittance, good low temperature performance, and fast response time. The liquid crystal composition of the present invention has a large ε⊥ / |Δε ratio, low rotational viscosity, fast response time, and has good pre-tilt angle forming ability when applied to PSVA.

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

The present invention discloses a liquid crystal composition with a wide temperature range and a high birefringence, wherein the liquid crystal composition comprises one or more liquid crystal compounds as shown in the general structural formulas I, II, and III: #imgabs0# The present invention also discloses an optical communication element and a high-frequency component comprising the liquid crystal composition.

The invention relates to a novel liquid crystal material and application thereof, the liquid crystal material takes a structure combining a hetero-five-membered aromatic ring and a benzene ring as a molecular core skeleton, different types of heteroatoms are introduced into the hetero-five-membered aromatic ring, and adjustable substituents are arranged at the benzene ring and the molecular terminal, so that the novel liquid crystal material is obtained. Cooperative regulation and control of molecular rigidity and flexibility, polarization capability and intermolecular interaction are realized. Through the structural design, the liquid crystal material disclosed by the invention effectively reduces the rotary viscosity of molecules and improves the electro-optical response speed while maintaining good dielectric properties and optical modulation capability, and is beneficial to reducing the driving voltage of a device, so that the comprehensive optimization of the performance of the liquid crystal material is realized. The liquid crystal material is suitable for being used as a liquid crystal working medium or a liquid crystal formula component in a liquid crystal display device, and is especially suitable for liquid crystal display application scenes with relatively high requirements on low power consumption and quick response.