82results about How to "Large elastic constant" patented technology

The invention discloses a liquid crystal composition containing 2-methyl-3,4,5-trifluorophenyl liquid crystal compound and an application thereof. The liquid crystal composition disclosed by the invention comprises the following components in parts by weight: (1) 1-80 parts of one or a plurality of compounds of the general formula I, and (2) 10-70 parts of one or a plurality of compounds of the general formula II. The liquid crystal composition provided by the invention is a nematic liquid crystal composition, and has low rotary viscosity, large elastic constant and fast response speed.

The invention relates to the liquid crystal field, and especially relates to a liquid crystal composition and applications thereof in the liquid crystal display field. The liquid crystal composition is composed of the following compounds in parts by weight: 5 to 40 parts of one or more compounds represented by the formula I, 2 to 30 parts of one or more compounds represented by the formula II, and 20 to 70 parts of one or more compounds represented by the formula III, and may also comprises 4 to 30 parts of one or more compounds represented by the formula IV, or / and 5 to 25 parts of one or more compounds represented by the formula V to IX. By the cooperation among the compounds, the rotation viscosity of the liquid crystal composition can be effectively reduced, the related performances of mixed liquid crystal are improved, and thus the responding time is reduced. The provided liquid crystal composition can be used to produce quick response liquid crystal display with a plurality of display modes.

Provided is a polar compound which has high chemical stability and high ability of aligning liquid crystal molecules, and which enables the achievement of high voltage holding ratio if used for a liquid crystal display element. A compound represented by formula (1). (In the formula, R1 represents, for example, an alkyl group having 1-15 carbon atoms; each of rings A1-A5 represents 1,4-cyclohexylene or 1,4-phenylene; each of Z1 and Z5 represents a single bond or an alkylene group having 1-10 carbon atoms; each of a and b represents a number of 0-4, and the sum of a and b is 4 or less; d represents a number of 1-4; each of c and e represents a number of 0-4; each of P1-P3 represents a polymerizable group represented by one of formulae (P-1)-(P-5), wherein each of M1-M3 represents a hydrogen atom or an alkyl group having 1-5 carbon atoms; and R2 represents a group represented by one of formulae (1a)-(1c), wherein each of Sp1-Sp5 represents a single bond or an alkylene group having 1-10 carbon atoms, S1 represents >CH-, S2 represents >C<, and X1 represents -OH.)

The invention relates to a liquid crystal composition which comprises the following components in parts by weight: 1-30 parts of compound disclosed as general formula I and 10-70 parts of compound disclosed as general formula II. The liquid crystal composition has the advantages of low rotary viscosity, high elastic constant, favorable low-temperature mutual solubility and high response speed, can be used for multiple display modes of quick-response liquid crystal display, and can obviously improve the display effect of the liquid crystal display device in TN (twisted nematic), IPS (in-plane switching) or FFS (fringe field switching)-mode display devices.

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 addresses the problem of providing: a liquid crystal composition which has a sufficiently low solid phase-nematic phase transition temperature (Tcn), a sufficiently small viscosity (η), a sufficiently small rotational viscosity (γ1), a high coefficient of elasticity (K33), and a negative dielectric anisotropy (Δε) with a large absolute value without reducing the refractive index anisotropy (Δｎ) and the nematic phase-isotropic liquid phase transition temperature (Tni); and further a liquid crystal display element which uses the same, has no or suppressed display defects of a VA type, etc., and has excellent display quality and a high response speed. The present invention provides: a liquid crystal composition which comprises a compound represented by formula (N2) as a first component, one type or more of a compound represented by general formula (N3) as a second component, and one type or more of a compound having a negative dielectric anisotropy (Δε) with an absolute value greater than 3 as a third component; and a liquid crystal display element which uses the same.

The invention provides a liquid crystal composition with the high reliability and application thereof. The liquid crystal composition is prepared from, by weight, 5-40 parts of a compound represented by the general formula I (the formula is shown in the description), 20-70 parts of a compound represented by the general formula II (the formula is shown in the description), 1-40 parts of a compound represented by the general formula III (the formula is shown in the description) and 0-30 parts of a compound represented by the general formula IV (the formula is shown in the description). The liquid crystal composition has the high voltage holding ratio, the low ion concentration, the excellent light stability, the appropriate optical anisotropy, the good low-temperature intersolubility, the high elastic constant and the good thermal stability and can effectively solve the reliability problem of a liquid crystal display, effectively solve the residual image problem of the liquid crystal display, improve the display quality of the liquid crystal display and prolong the service life of the liquid crystal display. Therefore, the liquid crystal composition is suitable for high-reliability TN, IPS and FFS type TFT liquid crystal display devices and especially suitable for IPS and FFS type liquid crystal display devices.

The invention relates to field of liquid crystal display technology, and especially relates to a nematic liquid crystal composition and an application thereof. The nematic liquid crystal composition at least comprises a compound represented by a general formula I: R1 and R2 respectively and independently represent linear alkyl of C1-C12, wherein one or more CH2 which are not adjacent can be substituted by O, S or CH=CH; the composition at least comprises one compound shown in general formula II: R3 and R4 respectively and independently represent linear alkyl of C1-C12, wherein one or more CH2 which are not adjacent can be substituted by O, S or CH=CH; A1 and A2 respectively and independently represent trans-1,4-cyclohexyl or 1,4-phenylene. Preferably, the liquid crystal composition comprises 1-40 parts by weight of the compound represented by the general formula I and 1-60 parts by weight of the compound represented by the general formula II. The liquid crystal composition comprises low rotary viscosity and high elastic constant, and shows shorter response time, so that problem of slow response speed of the liquid crystal display is effectively solved.

Provided are a liquid crystal composition containing a compound represented by general formula (I-IV) and containing a compound represented by general formula (I), and a liquid crystal display element which uses the liquid crystal composition. This liquid crystal composition has adequately low viscosity (eta), adequately low rotational viscosity (gamma1), a large elastic coefficient (K33), a high voltage holding rate (VHR (UV)) after UV irradiation, and negative dielectric anisotropy ([delta]epsilon) having a large absolute value without a reduction in refractive index anisotropy ([delta]n) and nematic phase-isotropic liquid phase transition temperature (Tni), and a display element which uses the liquid crystal composition makes it possible to realize high response speed and excellent display quality in which display defects are eliminated or suppressed.

The invention discloses a liquid crystal composition and application thereof. The liquid crystal composition comprises: at least one compound of general formula I and at least one compound of generalformula I'. The liquid crystal composition provided by the invention has suitable optical anisotropy, has relatively high bright spot, and has relatively large elastic constants K11 and K33 while maintaining relatively high clearing point and relatively low dielectric anisotropy and good low-temperature clearing point. When applied to liquid crystal displays, the liquid crystal composition can show the advantages of fast response, high contrast, wide temperature range, etc.

Provided are: a liquid crystal composition which, without causing a decrease in the refractive index anisotropy (delta n) or the nematic phase-isotropic liquid phase transition temperature (Tni), has a sufficiently low viscosity (eta), a sufficiently low rotational viscosity (gamma 1), a high elastic constant (K33), and a large absolute value for negative dielectric constant anisotropy (delta epsilon); and a liquid crystal display element which uses the liquid crystal composition, in which display defects are non-existent or suppressed in VA type displays and the like, which exhibits excellent display quality, and which exhibits a rapid response speed. Specifically, provided are: a liquid crystal composition which has negative dielectric constant anisotropy, contains one or more compounds represented by general formula (i) as a first component, and contains one or more compounds selected from among compounds represented by general formula (L) as a second component; and a liquid crystal display element which uses the liquid crystal composition.

The invention relates to a negative dielectric anisotropic liquid crystal composition containing benzofuran and applications thereof. The liquid crystal composition comprises at least one or more compounds represented by the formula I and one or more compounds represented by the formula II. The provided liquid crystal composition has the advantages of low rotary viscosity, large elastic constant,good low temperature inter-solubility, and quick response speed, can be applied to multiple display modes of quick response liquid crystal display, and can obviously improves the display effect of a liquid crystal display of a VA / MV / PVA / PSVA, IPS or FFS mode.

The invention relates to a negative dielectric anisotropic liquid crystal composition and applications thereof. The liquid crystal composition comprises at least one or more compounds represented by the formula I and one or more compounds represented by the formula II. The provided liquid crystal composition has the advantages of low rotary viscosity, large elastic constant, good low temperature inter-solubility, and quick response speed, can be applied to multiple display modes of quick response liquid crystal display, and can obviously improves the display effect of a liquid crystal displayof a VA / MV / PVA / PSVA, IPS or FFS mode.

The invention provides a liquid crystal composition. The liquid crystal composition contains at least one compound of a formula I, at least one compound of a formula II-1 and\or II-2, and at least onecompound of a formula III. The liquid crystal composition has high transmittance, high optical anisotropy, a high clearing point, appropriate dielectric anisotropy, and relatively large elastic constants K11 and K33. The invention also provides a liquid crystal display device containing the liquid crystal composition; and the liquid crystal display device containing the liquid crystal compositioncan have the advantages of high transmittance, high contrast, and the like, thereby having a good display effect.

The present invention pertains to: a nematic liquid crystal composition that is useful as a liquid crystal display material and exhibits negative dielectric anisotropy (Δε); and a liquid crystal display element that uses the nematic liquid crystal composition. This liquid crystal composition has a viscosity (η) that is sufficiently small, a rotational viscosity (γ1) that is sufficiently small, an elastic constant (K33) that is large, and has a negative dielectric anisotropy (Δε) with a large absolute value, without reducing the refractive index anisotropy (Δn) and nematic phase-isotropic liquid phase transition temperature (Tni). Furthermore, the liquid crystal composition is capable of providing a liquid crystal display element that provides a high response speed and excellent display quality, and minimizes or eliminates display defects in vertical-alignment displays, and the like, in which the liquid crystal display element is used. The liquid crystal display element, which uses this liquid crystal composition, is useful for active matrix driven liquid crystal display elements, and can be used for liquid crystal display elements in vertical-alignment and polymer sustained vertical-alignment displays, and the like.

The present invention relates to a fast response liquid crystal composition, which comprises at least one or a plurality of compounds represented by a general formula I, one or a plurality of compounds represented by a general formula II, and one or a plurality of compounds represented by a general formula III. According to the present invention, the liquid crystal composition has advantages of low rotation viscosity, large elastic constant, good low-temperature mutual solubility and fast response speed, can be used for fast response liquid crystal display of various display modes, can significantly improve the display effects of liquid crystal display devices in TN, IPS or FFS mode display devices, and is especially suitable for IPS and FFS mode liquid crystal display devices. The formulas I, II and III are defined in the specification.

The invention relates to a liquid crystal composition. The liquid crystal composition comprises a compound with the general formula shown in the description. The composition disclosed by the invention has low viscosity gamma 1, moderate dielectric anisotropy delta epsilon, moderate optical anisotropy delta n and a greater K value, and can be used for realizing rapid responses of the liquid crystal display.

The present invention provides: a liquid crystal composition which contains at least one compound represented by general formula (i) and has negative dielectric anisotropy; and a liquid crystal display element manufactured using the liquid crystal composition. The problem to be solved by the present invention is to provide: a liquid crystal composition having high refractive index anisotropy (delta n), a small rotational viscosity (gamma 1) and a large elastic constant (K33) and also having a high voltage holding ratio (VHR) and negative dielectric anisotropy (delta epsilon); and a liquid crystal display element which is manufactured using the liquid crystal composition, is reduced in display defects including dropping marks, image sticking and display unevenness or does not have such display defects, and therefore has excellent display quality and also has a rapid response speed.

The invention discloses a negative dielectric anisotropy liquid crystal composition with a display mode of IPS or FFS, a liquid crystal display element containing the liquid crystal composition, and a liquid crystal display, and belongs to the field of liquid crystal display. The liquid crystal composition comprises 17-23% by mass of a compound represented by a formula I, 8-12% by mass of a compound represented by a formula II, at least two compounds represented by a formula III and having a total mass content of 15-20%, at least two compounds represented by a formula IV and having a total mass content of 8-12%, one or more compounds with the mass content of 9-13% as shown in a formula V and one or more compounds as shown in a formula VII. The liquid crystal composition disclosed by the invention has a relatively low ratio of rotary viscosity gamma 1 to elastic constant K and relatively large optical anisotropy n, and can be used for developing liquid crystal display elements or liquid crystal displays with quick response and low box thickness.

The invention relates to a liquid crystal material and application fields thereof, particularly to a liquid crystal composition containing a fluoroterphenyl structure compound and a 2-methyl-3,4,5-trifluorobenzene structure compound, and applications thereof. According to the present invention, the liquid crystal composition comprises compounds represented by general formulas I, II and III, has characteristics of low rotational viscosity, high electrical resistivity, suitable optical anisotropy, good low-temperature mutual solubility, high elastic constant, excellent light stability and excellent thermal stability, and can reduce the response time of liquid crystal display devices so as to solve the problem of slow response of liquid crystal display devices, such that the liquid crystal composition is suitable for fast response TN, IPS and FFS type TFT liquid crystal display devices, particularly for IPS and FFS liquid crystal display devices. The general formulas I, II and III are defined in the specification.

The purpose of the present invention is to provide a liquid crystal composition having the appropriate balance in relation to at least one or at least two characteristics from among characteristics such as the following: a high nematic phase upper-limit temperature; a low nematic phase lower-limit temperature; low viscosity; appropriate optical anisotropy; large dielectric anisotropy; large relative permittivity; high stability with respect to ultraviolet rays or heat; and a large elastic constant. A further purpose is to provide an active matrix element that has: a short response time; a large voltage retention rate; a low threshold voltage; a large contrast ratio; a large negative DC luminance relaxation time constant; and a long life. Provided are the following: a liquid crystal composition that has positive dielectric anisotropy, that contains, as an additive component, a compound which contributes to high-stability with respect to heat or ultraviolet rays, and that contains, as a first component, a prescribed compound having low viscosity; and a liquid crystal display element that contains the composition. The composition may contain the following: a prescribed compound which serves as a second component and has large positive dielectric anisotropy; a prescribed compound which serves as a third component and which has a high upper-limit temperature or low viscosity; or a prescribed compound which serves as a fourth component and which has negative dielectric anisotropy.

The invention relates to a liquid crystal composition having large dielectric anisotropy. The liquid crystal composition comprises at least one of compounds represented by a general formula I, at least one of compounds represented by a general formula II, and at least one of compounds represented by a general formula III. The liquid crystal composition provided by the invention has low rotary viscosity, a large elastic constant, good low-temperature intersolubility and a fast response speed, can be applied to fast-response liquid crystal displays in a plurality of display modes, and can obviously improve displaying effects of liquid crystal displays while being used in the liquid crystal displays in TN, IPS or FFS modes.

The invention discloses a liquid crystal composition containing 2-methyl-3,4,5-trifluorophenyl liquid crystal compound and an application thereof. The liquid crystal composition disclosed by the invention comprises the following components in parts by weight: (1) 1-80 parts of one or a plurality of compounds of the general formula I, and (2) 10-70 parts of one or a plurality of compounds of the general formula II. The liquid crystal composition provided by the invention is a nematic liquid crystal composition, and has low rotary viscosity, large elastic constant and fast response speed.

The invention relates to a liquid crystal material and an application field thereof, particularly to a liquid crystal composition containing fluoro terphenyl, and applications thereof, wherein the liquid crystal composition comprises compounds represented by formulas I, II and III. According to the present invention, the liquid crystal composition has characteristics of low rotational viscosity, large elastic constant, good low-temperature mutual solubility and fast response speed, can be used for fast response liquid crystal display with various display modes, can significantly improve the display effects of liquid crystal display devices in TN, IPS or FFS mode display devices, and is especially suitable for IPS and FFS mode liquid crystal display devices. The general formulas I, II and III are defined in the specification.

The invention relates to a negative liquid crystal composition and application thereof, and belongs to the field of liquid crystal materials. The negative liquid crystal composition comprises at least one compound with a 2-substituted-1, 4-dicyclohexylbiphenyl structure as shown in a general formula I, at least one compound as shown in a general formula II and at least one compound as shown in a general formula III. The adopted compounds have good low-temperature intersolubility and moderate dielectric anisotropy and refractive index anisotropy. The negative liquid crystal composition is good in low-temperature intersolubility and large in elastic constant, and the response time is shortened.

The invention provides a door opening device, which can shorten the opening time of the door, realize miniaturization, increase the extension stroke and extension force, and improve the service life. The rotation of the motor (7) is transmitted to the pinion (12) through the reduction mechanism (8, 10), and is converted into a linear motion by the rack (13a) meshed with the pinion (12). ) between the plunger (13) that advances and retreats together and the push rod (14) that is inserted on the plunger (13) is equipped with a spring (15), and the advancement of the plunger (13) compresses the spring (15) until reaching In order to accumulate the required elastic force, under the restoring force of the spring (15), the push rod (14) stretches out at a high speed faster than the advancing speed of the plunger (13), thereby opening the door ( 2).

The present invention relates to a fast-response liquid crystal composition, which contains at least one or a plurality of compounds represented by a formula I, one or a plurality of compounds represented by a formula II, and one or a plurality of compounds represented by a formula III, has characteristics of low rotational viscosity, large elastic constant, good low-temperature mutual solubilityand fast response, can be used for fast response liquid crystal display with various display modes, can significantly improve the display effects of liquid crystal display devices in TN, IPS or FFS mode display devices, and is especially suitable for IPS and FFS mode liquid crystal display devices. The formulas I, II and III are defined in the specification.

The invention provides a liquid crystal composition. The liquid crystal composition contains at least one compound of a formula I, at least one compound of a formula II, and at least one compound of aformula III. The liquid crystal composition has high optical anisotropy and also has relatively large elastic constants K11 and K33 while maintaining a high clearing point, appropriate dielectric anisotropy, and good low-temperature mutual solubility. The invention also provides a liquid crystal display device containing the liquid crystal composition; and the display device has the advantages offast response, high contrast, large temperature width range, and the like, thereby having a good display effect and a wide application range.

The invention relates to a liquid crystal composition containing fluoroalkoxy liquid crystal compounds, wherein 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. The compound as shown in the general formula I has a 2,3-difluorobenzene structure and has relatively high negative dielectric anisotropy and a high clearing point; and the compound as shown in the general formula II contains fluoroalkoxy biphenyl 2,3-difluorobenzene and has low rotary viscosity as well as relatively high optical anisotropy and negative dielectric anisotropy. The liquid crystal composition disclosed by the invention has low rotary viscosity, large elastic constant, good low temperature intersolubility and highresponse speed and can be used for fast response liquid crystal display in various display modes; and when being used in a display in a VA / MVA / PVA / PSVA, IPS or FFS mode, the liquid crystal compositionis capable of obviously improving the display effect of a liquid crystal display and particularly has a good effect on improving the response time of the liquid crystal display.