LIQUID CRYSTAL COMPOSITION

The present invention provides a liquid crystal composition, comprising one or more compounds shown as formula I and one or more compounds shown as formula II, and the liquid crystal composition comprising a compound shown as formula II-A: 9. A liquid crystal display element or a liquid crystal display claim 1 , wherein the liquid crystal display element or the liquid crystal display comprises the liquid crystal composition according to ; the display element or display is an active matrix display element or display or a passive matrix display element or display.10. The liquid crystal display element or liquid crystal display according to claim 9 , wherein the active matrix display element or display is a TN-TFT or IPS-TFT liquid crystal display element or display. The present invention relates to the technical field of liquid crystal display, particularly to a liquid crystal composition, and a liquid crystal display element or a liquid crystal display including the liquid crystal composition.At represent, liquid crystal compounds, with the application field thereof being expanded more and more widely, may be applied to various types of display devices, optical devices, sensors and so on. There are various kinds of liquid crystal compounds applied to the field of display, wherein a nematic liquid crystal compound is applied the most widely. The nematic liquid crystal has been applied to passive TN and STN matrix displays and systems with TFT active matrix.For the application field of TFT-LCD (Thin-Film Transistor Technology), in recent years, although the market has been very huge and the technology has been gradually matured, people also have constantly improving requirement to the display technology, especially to aspects of achieving fast response and reducing a driving voltage to reduce a power consumption. As one of the important optoelectronic materials of the liquid crystal display, a liquid crystal material plays an important role in improving the performance ...

Liquid Crystal Compound

Disclosed is a liquid crystal compound. The compound has a general structural formula as shown by formula I. 110-. (canceled)14. A liquid-crystal mixture comprising component A claim 11 , wherein said component A comprises at least one compound selected from compounds of formula I indicated in .15. A liquid crystal mixtures according to claim 14 , wherein the component A comprises 1-5 compounds of formula I.16. A liquid crystal mixtures according to claim 15 , wherein the component A comprises 1-3 compounds of formula I.19. A liquid-crystal mixtures according to claim 17 , wherein the mass ratio of component A and component B in the liquid-crystal mixtures is about 1-70:100.20. A liquid-crystal mixtures according to claim 17 , wherein the mass ratio of component A and component B in the liquid-crystal mixtures is about 2-40:100.21. A liquid-crystal mixtures according to claim 17 , wherein the mass ratio of component A and component B in the liquid-crystal mixtures is about 13:100.23. A liquid crystal display incorporating a liquid crystal mixture according to claim 11 , wherein the display is one of TN-TFT claim 11 , STN claim 11 , IPS and VA liquid crystal displays. This application is a national phase application of PCT/CN2012/001568, filed on Nov. 21, 2012, which claims priority to Chinese Patent Application No. 20110378753.2, filed Nov. 24, 2011. The disclosure of which are herein incorporated by reference in their entirety.The invention relates to the field of liquid crystal compounds and their application, in particular to liquid crystal compounds containing a difluoromethyleneoxy bridge (—CFO—) and bicyclo[3.3.0]octane ring, their preparation method and application.At present, the liquid crystal compounds are widely applied in various types of displays, electro-optical devices, sensors and the like, and a large number of liquid crystal compounds have been used in display area, wherein the nematic liquid crystal is most widely used. Nematic liquid crystals ...

LIQUID CRYSTAL COMPOSITION, LIQUID CRYSTAL DISPLAY ELEMENT AND LIQUID CRYSTAL DISPLAY

The invention relates to a liquid crystal composition, a liquid crystal display element and a liquid crystal display comprising the liquid crystal composition, belonging to the field of liquid crystal display. The liquid crystal composition of the present disclosure comprises a compound of formula I and one or more compounds of formula II. The liquid crystal composition can increase the dielectric anisotropy and improve the voltage retention rate. 10. A liquid crystal display element or liquid crystal display- claim 1 , wherein that the liquid crystal display element or liquid crystal display comprises the liquid crystal composition of claim 1 , the liquid crystal display element or liquid crystal display is an active matrix display element or display or a passive matrix display element or display. The present disclosure belongs to the field of liquid crystal display, in particular to a liquid crystal composition and a liquid crystal display element or liquid crystal display containing the liquid crystal composition.Display is the process of transforming electrical signal (data information) into visible light (visual information), flat panel display (FPD) is the most popular display device now. Liquid crystal display (LCD) is the first product developed and commercialized in FPD. At present, thin film transistor liquid crystal (TFT-LCD) has become the mainstream product in LCD application.The development of TFT-LCD has gone through a long period of basic research. After the realization of mass production and commercialization, TFT-LCD products are rapidly recognized by the market for their advantages of light weight, environmental protection and high performance, and gradually develop to large-scale and multi-type applications. The application of TFT-LCD can be seen everywhere, whether it is a small-sized mobile phone screen, a large-scale Notebook PC or monitor, and a large-scale LCD TV (LCDTV). TFT-LCD can be divided into three types, twisted nematic/super twisted ...

Liquid crystal composition, liquid crystal display element and liquid crystal display

The invention relates to a liquid crystal composition, a liquid crystal display element and a liquid crystal display comprising the liquid crystal composition, belonging to the field of liquid crystal display. The liquid crystal composition of the present disclosure comprises a compound represented by formula I and one or more compounds represented by formula II. The liquid crystal composition can increase the dielectric anisotropy and improve the voltage retention rate.

Liquid crystal composition and liquid crystal display component

Disclosed are a liquid crystal composition and a liquid crystal display component. The liquid crystal composition comprises one or more compounds as represented by structural formula I-1 and/or one or more compounds as represented by structural formula I-2, one or more compounds as represented by structural formula II, and one or more compounds as represented by structural formula III: The liquid crystal display component includes the liquid crystal composition. The liquid crystal composition has a lower viscosity, can achieve a fast response, and further has a moderate dielectric anisotropy Δε, a moderate optical anisotropy Δn, and a high stability to heat and light. The liquid crystal display component including the liquid crystal composition has the characteristics of a broader nematic phase temperature range, a suitable birefringence anisotropy, a very high electrical resistivity, a good anti-ultraviolet property, a high charge retention ratio, and a fast response.

LIQUID CRYSTAL COMPOUND AND LIQUID CRYSTAL COMPOSITION

Provided is a liquid crystal compound represented by formula I, 6. The liquid crystal composition according to claim 4 , wherein in said liquid crystal composition claim 4 , the total content in mass percentage of the compounds represented by formula I is 1-40% claim 4 , and the total content in mass percentage of the compounds represented by formula II is 5-65%.11. A liquid crystal display element or liquid crystal display comprising the liquid crystal compound of claim 1 , wherein said liquid crystal display element or liquid crystal display is an active matrix display element or display or a passive matrix display element or display. The present invention belongs to the technical field of liquid crystal materials, and more particularly relates to a highly vertical dielectric positive liquid crystal compound, a liquid crystal composition, and a liquid crystal display device containing such a liquid crystal.At present, the expansion of application range of liquid crystal compounds becomes larger and larger, and the liquid crystal compounds can be used in various types of displays, electro-optical devices, sensors, etc. There are a great variety of liquid crystal compounds used in the above-mentioned display field, wherein nematic liquid crystals are used most extensively. Nematic liquid crystals have been used in passive TN and STN matrix displays and systems having a TFT active matrix.With regard to the application field of thin film transistor techniques (TFT-LCD), although the market in recent years has become very huge, and the techniques also become gradually mature, requirements of display techniques are increasing continuously, especially in terms of achieving a quick response, reducing the drive voltage for reducing power consumption, etc. Liquid crystal materials, as one of the important optoelectronic materials for liquid crystal displays, play an important role in improving the performance of a liquid crystal display.As liquid crystal materials, they ...

Liquid crystal composition and liquid crystal display element or display thereof

The present invention discloses a negative dielectric anisotropic liquid crystal composition, characterized in that the liquid crystal composition comprises one or more compounds represented by formula I, one or more compounds represented by formula II, one or more compounds represented by formula III and one or more compounds represented by formula IV, In the liquid crystal molecules of the composition, the van der Waals force therebetween is used as a motive force, such that the liquid crystal molecules generate an attractive force at an appropriate distance and positional relationships, thereby enabling the liquid crystal molecules to have excellent regular alignment characteristics, which is favorable for the liquid crystal molecules to modulate the transmission and blocking of light in the liquid crystal display device.

LIQUID CRYSTAL COMPOUND CONTAINING 2,3,4-TRISUBSTITUTED BENZENE AND COMPOSITION THEREOF

Provided is a liquid crystal compound containing 2,3,4-trisubstituted benzene, a liquid crystal composition thereof, and a liquid crystal display element or a liquid crystal display comprising the liquid crystal compound or the liquid crystal composition, wherein the liquid crystal composition has a lower viscosity, can achieve a quick response, and further has a moderate dielectric anisotropy Δϵ, a moderate optical anisotropy Δn, and high stability to heat and light. The liquid crystal display element or liquid crystal display comprising the liquid crystal composition has the properties of a wider nematic phase temperature range, an appropriate birefringence anisotropy, a very high electrical resistivity, a good ultraviolet resistant property, a high charge retention rate, a low vapor pressure etc., and particularly, the liquid crystal compound or the liquid crystal composition has the advantage of a high light transmittance. 3. The liquid crystal composition according to claim 1 , wherein in said liquid crystal composition claim 1 , the total content in mass percentage of the compounds represented by formula I is 0.5-50% claim 1 , the total content in mass percentage of the compounds represented by formula II-B is 5-65% claim 1 , and the total content in mass percentage of the compounds represented by formula II except the compounds represented by formula II-B is 0-30%.12. A liquid crystal display element or liquid crystal display comprising the liquid crystal compound or liquid crystal composition of claim 1 , wherein said liquid crystal display element or liquid crystal display is an active matrix display element or display or a passive matrix display element or display.15. A liquid crystal display element or liquid crystal display comprising the liquid crystal compound or liquid crystal composition of claim 10 , wherein said liquid crystal display element or liquid crystal display is an active matrix display element or display or a passive matrix display ...

HIGHLY VERTICAL DIELECTRIC LIQUID CRYSTAL COMPOSITION AND LIQUID CRYSTAL DISPLAY DEVICE

A liquid crystal composition having one or more compounds represented by formula I, one or more compounds represented by formula II and one or more compounds represented by formula III: 3. The liquid crystal composition according to claim 1 , wherein claim 1 , in said liquid crystal composition claim 1 , a total content in mass percentage of said one or more compounds represented by formula I is 1-40% claim 1 , a total content in mass percentage of said one or more compounds represented by formula II is 1-40% claim 1 , and a total content in mass percentage of said one or more compounds represented by formula III is 1-80%.10. A liquid crystal display element or liquid crystal display comprising the liquid crystal composition of claim 1 , wherein said liquid crystal display element or liquid crystal display is an active matrix display element or display or a passive matrix display element or display. The present invention belongs to the technical field of liquid crystal materials, and particularly relates to a highly vertical dielectric liquid crystal composition and a liquid crystal display device containing such a liquid crystal.At present, the expansion of application range of liquid crystal compounds is becoming larger and larger, and the liquid crystal compounds can be used in various types of displays, electro-optical devices, sensors, etc. There are a great variety of liquid crystal compounds used in the above-mentioned display field, wherein nematic liquid crystals are used most extensively. Nematic liquid crystals have been used in passive TN and STN matrix displays and systems having a TFT active matrix.With regard to the application field of thin film transistor techniques (TFT-LCD), although the market in recent years has become very huge, and the techniques also have become gradually mature, requirements of display techniques are increasing continuously, especially in terms of achieving a quick response, reducing the drive voltage for reducing power ...

LIQUID CRYSTAL COMPOUNDS OF CYCLOALKYL-CONTAINING DIBENZOFURAN DERIVATIVES, PREPARATION METHOD THEREFOR AND USE THEREOF

Disclosed are liquid crystal compounds of cycloalkyl-containing dibenzofuran derivatives, a preparation method therefor and use thereof. The compounds are as represented by formula I. In the molecular structures of the compounds of formula I provided by the present invention, liquid crystal compounds of cycloalkyl terminal group-containing dibenzofuran derivatives, compared with those having flexible alkyl chains as terminal groups, exhibit better intersolubility, and thus the use of a compound as represented by formula I provided by the present invention can improve the intersolubility of a liquid crystal compound and extend the application range of a liquid crystal mixture, producing an important application value. 4. A liquid crystal medium claim 1 , wherein said liquid crystal medium comprises one or more compounds as represented by formula I in .7. The liquid crystal medium according to claim 6 , wherein in said liquid crystal medium claim 6 , the total content in weight percentage of one or more compounds as represented by formula I is 1-24% claim 6 , the total content in weight percentage of one or more compounds as represented by formula IV is 35-58% claim 6 , and the total content in weight percentage of one or more compounds as represented by formula V is 30-46%.10. Use of any one or more compounds of in the preparation of a liquid crystal mixture claim 1 , a liquid crystal display device material or an electro-optical display device material. The present invention belongs to the technical field of liquid crystal compounds and applications, and relates to liquid crystal compounds of cycloalkyl-containing dibenzofuran derivatives, a preparation method therefor and use thereof.Since the Austrian scientist Reinitzer first synthesized a liquid crystal in 1888, the actual development of the liquid crystal industry is in the recent more than 30 years; since liquid crystal display materials have obvious advantages, such as a low drive voltage, a small power ...

Highly vertical dielectric liquid crystal compound, liquid crystal composition, and liquid crystal display device

Disclosed are a liquid crystal composition comprising a liquid of formula I and formula II-B, and a liquid crystal compound and a related liquid crystal display device wherein R 0 , R 1 , R 2 and R 3 each independently represent an alkyl group having a carbon atom number of 1-10, a fluoro-substituted alkyl group having a carbon atom number of 1-10, an alkoxy group having a carbon atom number of 1-10, a fluoro-substituted alkoxy group having a carbon atom number of 1-10, an alkenyl group having a carbon atom number of 2-10, a fluoro-substituted alkenyl group having a carbon atom number of 2-10, an alkenoxy group having a carbon atom number of 3-8 or a fluoro-substituted alkenoxy group having a carbon atom number of 3-8, and any one or more non-connected CH 2 in R 0 , R 1 , R 2 and R 3 may be substituted with cyclopentyl, cyclobutyl, cyclopropyl or —O—; Y represents ethyl or ethenyl; each independently represent one of and any fluorobenzene; represents benzene or fluorobenzene; and m represents one of 1, 2 and 3, and n represents one of 1 and 0.

Negative Dielectric Anisotropic Liquid Crystal Compounds Containing 2,3-Difluorophenyl Group, and Preparation Method and Use Thereof

A negative dielectric anisotropic liquid crystal compound containing 2,3-difluorophenyl, and a preparation method and use thereof are disclosed. The compound has a general structural formula as shown in Formula I. The negative dielectric anisotropic liquid crystal compound has a negative dielectric anisotropy (Δε), and has cyclobutyl or cyclopentyl as a terminal group. Compared with conventional liquid crystal compounds with a flexible alkyl chain as a terminal group, the compound of Formula I according to the present invention has the advantage of high clearing point, and enables extension of the application range of a liquid crystal mixture because a positive correlation exists between the clearing points of the liquid crystal mixture and monomer liquid crystal compounds. In addition, the compound can increase the absolute value of the negative dielectric constant of the liquid crystal mixture, thus having an important application value. 2. The compound according to claim 1 ,wherein H is cyclopentyl.3. The compound according to claim 1 , wherein H is cyclobutyl.5. A liquid crystal mixture I comprising a component A claim 1 , wherein the component A comprises at least one of the compounds of Formula I as defined in .8. (canceled)9. (canceled)10. (canceled)12. A liquid crystal mixture II comprising a component Aa claim 2 , wherein the component Aa comprises at least one of the compounds of Formula Ia as defined in .13. A liquid crystal mixture III comprising a component Ab claim 3 , wherein the component Ab comprises at least one of the compounds of Formula Ib as defined in .16. A method of adjusting at least one of clearing point and negative dielectric constant of a liquid crystal mixture claim 1 , comprising the step of adding a compound of Formula I according to .17. The method of claim 16 , wherein adjusting the clearing point of the liquid crystal mixture is to increase the clearing point of the liquid crystal mixture.18. The method of claim 16 , wherein ...

LIQUID CRYSTAL DISPLAY DEVICE

The present invention relates to a liquid crystal display device. The liquid crystal display device of the present invention comprises a first substrate, a second substrate, and a liquid crystal composition disposed between said first substrate and said second substrate, wherein said first substrate and said second substrate are disposed in parallel and opposite to each other; alignment layers are disposed on the sides of said first and second substrates that are close to said liquid crystal composition; and said alignment layers are provided with vertical alignment films that allow liquid crystal molecules in said liquid crystal composition to be arranged roughly perpendicular to said first and second substrates, with said liquid crystal molecules having a pretilt angle of 88.5° to 89.5°. 2. The liquid crystal display device according to claim 1 , wherein said first substrate is a color film substrate claim 1 , and said second substrate is a thin film transistor substrate; and said first substrate is provided with a common electrode claim 1 , and said second substrate is provided with a pixel electrode.3. The liquid crystal display device according to claim 1 , wherein said alignment layers have a thickness of 30 nm to 120 nm.4. The liquid crystal display device according to claim 1 , wherein said pretilt angle is 89.1° to 89.5°.5. The liquid crystal display device according to claim 1 , wherein said vertical alignment films are thin films formed by polymerizing a polymerizable compound having a polymerizable group. The present invention relates to the technical field of liquid crystal displays. More particularly, the invention relates to a liquid crystal display device.With the development of display technologies, flat panel display devices such as liquid crystal display (LCD) devices are widely used in various consumer electronics such as mobile phones, televisions, personal digital assistants, digital cameras, notebook computers, desktop computers due to having ...

Liquid crystal display device

The present invention relates to a liquid crystal display device. The liquid crystal display device of the present invention comprises a first substrate, a second substrate, and a liquid crystal composition disposed between said first substrate and said second substrate, wherein said first substrate and said second substrate are disposed in parallel and opposite to each other, with the distance between said first substrate and said second substrate being 2.5 μm to 3.2 μm; alignment layers are disposed on the sides of said first and second substrates that are close to said liquid crystal composition; and said alignment layers are provided with vertical alignment films that allow liquid crystal molecules in said liquid crystal composition to be arranged roughly perpendicular to said first or second substrate.

LIQUID CRYSTAL COMPOSITION AND LIQUID CRYSTAL DISPLAY ELEMENT

Provided are a polymerizable compound represented by formula I and a liquid crystal composition formed by combining such a polymerizable compound with a specific liquid crystal component, particularly a PSVA liquid crystal composition for displays or TV applications and a PSA-IPS liquid crystal composition for an IPS mode; in particular, the polymerizable compound has a faster polymerization rate, and a “material system” formed from the selected polymerizable component and liquid crystal component has a low rotary viscosity and good photoelectric properties, and has a high VHR after (UV) photoradiation, this avoiding the problem of the occurrence of residual images to final displays. 5. The liquid crystal composition according to claim 4 , characterized in that in said liquid crystal composition claim 4 , the total mass content of the compounds represented by formula I is 0.01-1% claim 4 , the total mass content of the compounds represented by formula II is 15-60% claim 4 , and the total mass content of said one or more compounds represented by general formula III is 20-60%.10. A liquid crystal display element or liquid crystal display comprising the liquid crystal composition of claim 4 , wherein said display element or display is an active matrix display element or display or a passive matrix display element or display. The present invention relates to the liquid crystal display field, and in particular relates to a liquid crystal composition formed by combining a specific polymerizable compound and a specific liquid crystal component and a liquid crystal display element or liquid crystal display comprising the liquid crystal composition.Thin film transistor liquid crystal displays (TFT-LCDs) have undergone a long period of basic research, and after realising large-scale production and commercialisation, thin film transistor liquid crystal displays have become mainstream products in LCD applications due to the advantages of light weight, being environmentally ...

LIQUID CRYSTAL COMPOSITION AND LIQUID CRYSTAL DISPLAY ELEMENT

Provided are a polymerizable compound represented by formula I and a liquid crystal composition comprising the polymerizable compound, particularly a PSVA liquid crystal composition for displays or TV applications and a PSA-IPS liquid crystal composition for an IPS mode; in particular, the polymerizable compound has a faster polymerization rate, and a “material system” formed from the selected polymerizable component and liquid crystal component has a lower rotary viscosity and better photoelectric properties, and has a high VHR after (UV) photoradiation, this avoiding the problem of the occurrence of residual images to final displays. 5. The liquid crystal composition according to claim 4 , characterized in that in said liquid crystal composition claim 4 , the total mass content of the compounds represented by formula I is 0.01-1% claim 4 , the total mass content of the compounds represented by formula II is 15-60% claim 4 , and the total mass content of the compounds represented by formula III is 20-60%.10. A liquid crystal display element or liquid crystal display comprising the liquid crystal composition of claim 4 , wherein said display element or display is an active matrix display element or display or a passive matrix display element or display.11. The liquid crystal display element or liquid crystal display according to claim 10 , characterized in that said active matrix display element or display is a PSVA-TFT liquid crystal display element or display. The present invention relates to the liquid crystal display field, and in particular relates to a liquid crystal composition formed by combining a specific polymerizable compound and a specific liquid crystal component and a liquid crystal display element or liquid crystal display comprising the liquid crystal composition.Thin film transistor liquid crystal displays (TFT-LCDs) have undergone a long period of basic research, and after realising large-scale production and commercialisation, thin film ...

LIQUID CRYSTAL COMPOSITION AND LIQUID CRYSTAL DISPLAY ELEMENT

The present invention provides a liquid crystal composition formed by combining a polymerizable compound represented by formula I with a specific liquid crystal component, particularly a PSVA liquid crystal composition for displays or TV applications and a PSA-IPS liquid crystal composition for an IPS mode, and a liquid crystal display element or liquid crystal display comprising this liquid crystal composition; in particular, the polymerizable compound has a faster polymerization rate, and a “material system” formed from the selected polymerizable component and liquid crystal component should have the lowest rotary viscosity and the best photoelectric properties, and has a high VHR after (UV) photoradiation, this avoiding the problem of the occurrence of residual images to final displays. 2. The liquid crystal composition according to claim 1 , characterized in that in said liquid crystal composition claim 1 , the total mass content of said one or more polymerizable compounds represented by formula I is 0.01-1% claim 1 , the total mass content of said one or more compounds represented by formula II is 15-60% claim 1 , and the total mass content of said one or more compounds represented by general formula III is 20-60%.7. A liquid crystal display element or liquid crystal display comprising the liquid crystal composition of claim 1 , wherein said display element or display is an active matrix display element or display or a passive matrix display element or display.8. The liquid crystal display element or liquid crystal display according to claim 7 , characterized in that said active matrix display element or display is a PSVA-TFT liquid crystal display element or display. The present invention relates to the liquid crystal display field, and in particular relates to a liquid crystal composition formed by combining a specific polymerizable compound and a specific liquid crystal component and a liquid crystal display element or liquid crystal display comprising the ...

Negative dielectric anisotropy liquid crystal composition

A negative dielectric anisotropy liquid crystal composition having one or more A-R—B compounds represented by formula I above as a first component, and one or more compounds represented by formula II above as a second component: 4. The liquid crystal composition according to claim 1 , wherein in said liquid crystal composition claim 1 , the total content in mass percentage of said one or more compounds represented by formula I is 1-40% claim 1 , and the total content in mass percentage of said one or more compounds represented by formula II is 1-65%.9. A liquid crystal display element or liquid crystal display comprising the liquid crystal composition of claim 1 , wherein said liquid crystal display element or liquid crystal display is an active matrix display element or display or a passive matrix display element or display. The present invention belongs to the technical field of liquid crystal materials, and particularly relates to a negative dielectric anisotropy liquid crystal composition and a liquid crystal display device containing such a liquid crystal.At present, the expansion of application range of liquid crystal compounds becomes larger and larger, and the liquid crystal compounds can be used in various types of negative dielectric anisotropy displays, electro-optical devices, sensors, etc. There are a wide range of liquid crystal compounds for use in the above-mentioned display field, wherein the application of nematic phase liquid crystals is the most extensive. Nematic phase liquid crystals have been used in passive TN and STN matrix displays and systems having a TFT active matrix.With regard to the application field of thin film transistor techniques (TFT-LCD), although the market in recent years has become very huge, and the techniques also become gradually mature, requirements of display techniques are increasing continuously, especially in terms of achieving a quick response, reducing the drive voltage for reducing power consumption, etc. Liquid ...

LIQUID CRYSTAL COMPOSITION, LIQUID CRYSTAL DISPLAY ELEMENT AND LIQUID CRYSTAL DISPLAY

The present disclosure relates to a liquid crystal composition, and a liquid crystal display element or liquid crystal display comprising the liquid crystal composition, and belongs to the field of liquid crystal display, wherein the liquid crystal composition of the present disclosure comprises a compound represented by formula I, one or more compounds represented by formula II, one or more compounds represented by formula III, one or more compounds represented by formula IV, and at least one polymerizable compound, and has a large dielectric anisotropy (Δε) and a large optical anisotropy (Δn), and has an obvious advantage in the development of a liquid crystal display having a high transmittance and a low cell thickness. 9. A liquid crystal display element claim 1 , comprising the liquid crystal composition of claim 1 , wherein said liquid crystal display element is an active matrix addressing display element claim 1 , or a passive matrix addressing display element.10. A liquid crystal display claim 1 , comprising the liquid crystal composition of claim 1 , wherein said liquid crystal display is an active matrix addressing display claim 1 , or a passive matrix addressing display. The present disclosure belongs to the field of liquid crystal display, and more particularly relates to a liquid crystal composition and a liquid crystal display element or liquid crystal display comprising the liquid crystal composition.Early commercial TFT-LCD products basically relate to using a TN display mode, and the largest problem thereof is a narrow viewing angle. With the increase in product size, especially in applications in the TV field, an IPS display mode and a VA display mode, which feature a wide view angle, have been sequentially developed and applied; in particular, on the basis of the improvement of the VA display mode, many big companies have successively made a breakthrough in the development thereof, which mainly depends on the advantages of a wide view angle, a ...

LIQUID CRYSTAL COMPOSITION, LIQUID CRYSTAL DISPLAY ELEMENT AND LIQUID CRYSTAL DISPLAY

The present disclosure relates to a liquid crystal composition, and a liquid crystal display element or liquid crystal display comprising the liquid crystal composition, and belongs to the field of liquid crystal display, said liquid crystal composition comprises a compound represented by formula I, a compound represented by formula II, one or more compounds represented by formula III, and at least one polymerizable compound, wherein the liquid crystal composition simultaneously has a low rotary viscosity, a large refractive index, and a fast response speed. 9. A liquid crystal display element claim 1 , comprising the liquid crystal composition of claim 1 , wherein said liquid crystal display element is an active matrix addressing display element claim 1 , or a passive matrix addressing display element.10. A liquid crystal display claim 1 , comprising the liquid crystal composition of claim 1 , wherein said liquid crystal display is an active matrix addressing display claim 1 , or a passive matrix addressing display. The present disclosure belongs to the field of liquid crystal display, and more particularly relates to a liquid crystal composition and a liquid crystal display element or liquid crystal display comprising the liquid crystal composition.Early commercial TFT-LCD products basically relate to using a TN display mode, and the largest problem thereof is a narrow viewing angle. With the increase in product size, especially in applications in the TV field, an IPS display mode and a VA display mode, which feature a wide view angle, have been sequentially developed and applied; in particular, on the basis of the improvement of the VA display mode, many big companies have successively made a breakthrough in the development thereof, which mainly depends on the advantages of a wide view angle, a high contrast, no need for rubbing alignment, etc., of the VA mode itself; furthermore, the contrast of the VA mode display is less dependent on the optical anisotropy (Δn ...

LIQUID CRYSTAL COMPOSITION, AND LIQUID CRYSTAL DISPLAY ELEMENT AND LIQUID CRYSTAL DISPLAY

The present disclosure relates to a liquid crystal composition, and a liquid crystal display element or liquid crystal display comprising the liquid crystal composition, and belongs to the field of liquid crystal display. The liquid crystal composition of the present disclosure comprises a compound represented by formula I, a compound represented by formula II, one or more compounds represented by formula III, and at least one polymerizable compound, the liquid crystal composition having a higher clearing point (CP), a large K value, a suitable optical anisotropy (Δn), and a fast response speed. 10. A liquid crystal display element or liquid crystal display claim 1 , comprising the liquid crystal composition of claim 1 , wherein said liquid crystal display element or liquid crystal display is an active matrix addressing display element or display claim 1 , or a passive matrix addressing display element or display. The present disclosure belongs to the field of liquid crystal display, and more particularly relates to a liquid crystal composition and a liquid crystal display element or liquid crystal display comprising the liquid crystal composition.Early commercial TFT-LCD products basically relate to using a TN display mode, and the biggest problem thereof is a narrow view angle. With the increase in product size, especially in applications in the TV field, an IPS display mode and a VA display mode, which feature a wide view angle, have been sequentially developed and applied; in particular, on the basis of the improvement of the VA display mode, many large companies have successively made a breakthrough in the development thereof, which mainly depends on the advantages of a wide view angle, a high contrast, no need for rubbing alignment, etc., of the VA mode itself; furthermore, the contrast of the VA mode display is less dependent on the optical anisotropy (Δn) of a liquid crystal, the thickness of a liquid crystal cell (d) and the wavelength (X) of an incident ...

LIQUID CRYSTAL COMPOSITION, LIQUID CRYSTAL DISPLAY ELEMENT AND LIQUID CRYSTAL DISPLAY

The present disclosure relates to a liquid crystal composition, and a liquid crystal display element or liquid crystal display comprising the liquid crystal composition, and belongs to the field of liquid crystal display, the liquid crystal composition of the present disclosure comprising a compound represented by formula I, one or more compounds represented by formula II, one or more compounds represented by formula III, and at least one polymerizable compound, wherein the liquid crystal composition simultaneously has a low rotary viscosity (γ1), a larger dielectric anisotropy (Δε), and a fast response speed. 8. A liquid crystal display element claim 1 , comprising the liquid crystal composition of claim 1 , wherein said liquid crystal display element is an active matrix addressing display element claim 1 , or a passive matrix addressing display element.9. A liquid crystal display claim 1 , comprising the liquid crystal composition of claim 1 , wherein said liquid crystal display is an active matrix addressing display claim 1 , or a passive matrix addressing display. The present disclosure belongs to the field of liquid crystal display, and more particularly relates to a liquid crystal composition and a liquid crystal display element or liquid crystal display comprising the liquid crystal composition.Early commercial TFT-LCD products basically relate to using a TN display mode, and the largest problem thereof is a narrow viewing angle. With the increase in product size, especially in applications in the TV field, an IPS display mode and a VA display mode, which feature a wide view angle, have been sequentially developed and applied; in particular, on the basis of the improvement of the VA display mode, many big companies have successively made a breakthrough in the development thereof, which mainly depends on the advantages of a wide view angle, a high contrast, no need for rubbing alignment, etc., of the VA mode itself; furthermore, the contrast of the VA mode ...

Liquid crystal compound and liquid crystal composition

The present invention provides a compound represented by formula I, which can achieve a self-alignment function. Furthermore, a negative liquid crystal composition comprising such a compound, and a liquid crystal display element or liquid crystal display comprising the compound or liquid crystal composition are provided. The compound represented by formula I contains two hydroxy groups. In an ODF process for a panel, due to an intermolecular force between the hydroxyl groups and the surface of the panel (a glass surface or an ITO electrode surface), the compound is spontaneously aligned, in a standing manner, on the panel glass or transparent ITO electrode substrate, causing liquid crystal molecules similar to the compound represented by formula Ito be vertically aligned, and UV light irradiation, a polymer layer with a rough surface is formed on the substrate by means of polymerization, and achieves the effects of PI insulation and vertical alignment of the liquid crystal molecules.

POSITIVE DIELECTRIC ANISOTROPIC LIQUID CRYSTAL COMPOSITION AND LIQUID CRYSTAL DISPLAY DEVICE

The present invention relates to a positive dielectric anisotropic liquid crystal composition comprising one or more compounds of formula I and one or more compounds of formula II, and a liquid crystal display device. The liquid crystal composition disclosed by the present invention has the characteristics of positive dielectric properties, a high charge retention ratio, a low rotary viscosity, a fast response time, and especially a high transmittance, and is suitable for manufacturing a TFT-LCD with a high transmittance and a fast response. 2. The positive dielectric anisotropic liquid crystal composition according to claim 1 , wherein claim 1 , in said liquid crystal composition claim 1 , the total mass content of the one or more negative compounds represented by formula I is 1%-30% claim 1 , and the total mass content of the one or more neutral compounds represented by formula II is 20%-80%.10. A liquid crystal display device claim 1 , wherein the liquid crystal display device comprises the positive dielectric anisotropic liquid crystal composition of claim 1 , and said liquid crystal display device is an active matrix display device or a passive matrix display device. The present invention belongs to the technical field of liquid crystal materials, and in particular relates to a liquid crystal composition and a liquid crystal display device.At the end of the 19th century, Austrian botanists discovered a liquid crystal, i.e. a crystal in a liquid state, that is, a substance has both the fluidity of liquids and certain alignment characteristics similar to those of crystals. Under the action of an electric field, the alignment of liquid crystal molecules changes, which affects the optical properties thereof. British scientists manufactured the first liquid crystal display (LCD) by using this property in the last century. Liquid crystal display materials have the advantages of a low drive voltage, a low power consumption, a high reliability, a large amount of ...

Liquid Crystal Compound Containing Cyclobutyl Group and Difluoromethyleneoxy Linking Group, and Preparation Method and Use Thereof

A liquid crystal compound containing cyclobutyl and a linking group difluoromethyleneoxy, and a preparation method and use thereof are disclosed. The compound is as shown in Formula I. The liquid crystal compound containing cyclobutyl as a terminal group and difluoromethyleneoxy (—CFO—) as a linking group in the molecular structure of Formula I according to the present invention, has not only a high dielectric anisotropy, but also importantly an extremely fast response speed and a high clearing point, which are of great significance for the formulation of a liquid crystal mixture. 3. A liquid crystal mixture comprising a component A , wherein the component A is consisted of at least one of the compounds of Formula I according to or .6. The liquid crystal mixture according to any one of to , characterized in that in the component B , the compounds of Formula II are each present in an amount of 10-35% by weight of the total weight of the liquid crystal mixture; andin the component C, the compounds of Formula III are each present in an amount of 2-12% by weight of the total weight of the liquid crystal mixture.7. Use of the compound of Formula I according to either or , or the liquid crystal mixture according to any one of to in the preparation of a liquid crystal display material or electrooptical display material.8. A liquid crystal display material or electrooptical display material comprising the compound of Formula I according to either or , or the liquid crystal mixture according to any one of to . The present invention relates to the field of liquid crystal compounds and use thereof and more particularly, to a liquid crystal compound containing cyclobutyl and a linking group difluoromethyleneoxy, and preparation method and use thereof.At present, the application range of liquid crystal compounds become increasingly widened, including their application in various types of displays, electro-optical devices, sensors and so on. There are numerous species of liquid ...

LIQUID CRYSTAL COMPOSITION

Disclosed is a liquid crystal composition comprising one or more compounds represented by formula I, one or more compounds represented by formula II, and one or more compounds represented by formula III: 3. The liquid crystal composition according to claim 1 , characterized in that in said liquid crystal composition claim 1 , the total mass content of the compounds represented by formula I is 10-70% claim 1 , the total mass content of the compounds represented by formula II is 10-70% claim 1 , and the total mass content of the compounds represented by formula III is 1-20%.10. A liquid crystal display element or device comprising the liquid crystal composition of .11. A liquid crystal display element or device comprising the liquid crystal composition of .12. A liquid crystal display element or device comprising the liquid crystal composition of .13. A liquid crystal display element or device comprising the liquid crystal composition of .14. A liquid crystal display element or device comprising the liquid crystal composition of .15. A liquid crystal display element or device comprising the liquid crystal composition of .16. A liquid crystal display element or device comprising the liquid crystal composition of .17. A liquid crystal display element or device comprising the liquid crystal composition of .18. A liquid crystal display element or device comprising the liquid crystal composition of . The present invention relates to the field of liquid crystal displays. More particularly, the present invention relates to a liquid crystal composition, and a display element or liquid crystal display comprising the liquid crystal composition.Thin film transistor liquid crystal displays (TFT-LCDs) have undergone a long period of basic research, and after realising large-scale production and commercialisation, thin film transistor liquid crystal displays have become mainstream products in LCD applications due to the advantages of light weight, being environmentally friendly, ...

LIQUID CRYSTAL COMPOSITION AND APPLICATION THEREOF

Disclosed is a liquid crystal composition and use thereof. The liquid crystal composition comprises components a, b and c; wherein component a is selected from one of the compounds represented by formula I; component b is a liquid crystal composition having a dielectric anisotropy of greater than 3; and component c is a liquid crystal composition having a dielectric anisotropy of −3 to 3. The liquid crystal composition has a high contrast ratio property, and has a low change rate at a low temperature, that is, the decrease of contrast ratio at a low temperature (such as −20° C.) is smaller as compared to a normal temperature. The composition has suitable properties with regard to practical applications, including a broader nematic phase range, an appropriate dielectric anisotropy, optical anisotropy and operating voltage, an excellent response time, a high electrical resistivity and voltage holding ratio, a low rotary viscosity, etc. 2. The composition according to claim 1 , wherein said liquid crystal composition is composed of components a claim 1 , b and c.3. The composition according to claim 1 , wherein the mass ratio of said components a claim 1 , b to c is 10-70:10-70:5-70.6. The composition according to claim 5 , wherein the mass ratio of said compound as represented by the formula IV to said compound as represented by the formula V is 0-30:0-40;wherein the mass ratio of said compound as represented by the formula IV to said compound as represented by the formula III is 0-30:5-70;and wherein neither the mass of the compound as represented by formula IV nor that of the compound as represented by formula V is 0.8. The composition according to claim 1 , wherein said liquid crystal composition is composed of compounds as represented by formulas I to V claim 1 , andcomposed of the compounds as represented by formulas I to V in a mass ratio of 10-70:10-70:5-70:0-30:0-40, wherein neither the mass of the compound as represented by formula IV nor that of the compound ...

Polymerizable compound, liquid crystal medium containing same and liquid crystal display device

Disclosed is a polymerizable compound having a structural formula as represented by the following formula I: The polymerizable compound disclosed in the present invention has a plurality of ring systems, and the entire molecular structure thereof is curved and twisted. The present invention further discloses a liquid crystal medium comprising the polymerizable compound, the polymerizable compound provided by the present invention has an appropriate polymerization rate in the liquid crystal medium, and the liquid crystal medium can be well applied to a PS-(polymer stabilized)- or PSA-(polymer stabilized alignment)-type liquid crystal display device. Further disclosed is a liquid crystal display device prepared from the liquid crystal medium.

STABILIZER AND LIQUID CRYSTAL COMPOSITION COMPRISING SAME

Disclosed is a novel stabilizer represented by formula I, 5. The liquid crystal composition according to claim 4 , characterized in that in said liquid crystal composition claim 4 , the total content in mass percentage of the compound represented by formula I is 0.001-5%; the total content in mass percentage of the compounds represented by formulas II-1 to II-10 is 1-60%; and the total content in mass percentage of the compounds represented by formulas II-11 to II-14 is 0-30%;wherein R0 and R2 each independently represent an alkyl group having a carbon atom number of 1-5 or an alkenyl group having a carbon atom number of 2-5, and R1 and R3 each independently represent an alkyl or alkoxy group having a carbon atom number of 1-5.16. A liquid crystal display element or liquid crystal display comprising the liquid crystal composition of claim 4 , characterized in that said liquid crystal display element or liquid crystal display is an active matrix display element or display or a passive matrix display element or display. The present invention relates to the liquid crystal display field, and specifically relates to a novel stabilizer, a liquid crystal composition comprising this stabilizer and a liquid crystal display element or liquid crystal display comprising the liquid crystal composition.At present, the expansion of application range of liquid crystal compounds becomes broader and broader, and the liquid crystal compounds can be used in various types of displays, electro-optical devices, sensors and the like. There are a wide range of liquid crystal compounds for use in the above-mentioned display field, wherein the application of nematic phase liquid crystals is the most extensive. Nematic phase liquid crystals have been used in passive TN and STN matrix displays and systems having a TFT active matrix.With regard to the application field of thin film transistor techniques (TFT-LCD), although the market in recent years has become very huge, and the techniques also ...

COMPOUND, LIQUID CRYSTAL MEDIUM CONTAINING THE COMPOUND AND APPLICATION THEREOF

The present invention discloses a compound of which a structural formula thereof is represented as the following formula 4. A liquid crystal medium claim 1 , containing one or more of the compounds according to .7. The liquid crystal medium according to claim 6 , wherein in the liquid crystal medium claim 6 , a mass percentage of the compound of which the structural formula is formula I being 1-24% claim 6 , a mass percentage of the compound of which the structural formula is formula IV being 35-58% claim 6 , and a mass percentage of the compound of which the structural formula is formula V being 30-46%.10. An application of the liquid crystal medium according to in preparation of a liquid crystal mixture claim 4 , a material for a liquid crystal display device claim 4 , or a material for an electro-optical display device.11. A liquid crystal medium claim 2 , containing one or more of the compounds according to .12. A liquid crystal medium claim 3 , containing one or more of the compounds according to .16. An application of the liquid crystal medium according to in preparation of a liquid crystal mixture claim 5 , a material for a liquid crystal display device claim 5 , or a material for an electro-optical display device.17. An application of the liquid crystal medium according to in preparation of a liquid crystal mixture claim 6 , a material for a liquid crystal display device claim 6 , or a material for an electro-optical display device.18. An application of the liquid crystal medium according to in preparation of a liquid crystal mixture claim 7 , a material for a liquid crystal display device claim 7 , or a material for an electro-optical display device.19. An application of the liquid crystal medium according to in preparation of a liquid crystal mixture claim 8 , a material for a liquid crystal display device claim 8 , or a material for an electro-optical display device.20. An application of the liquid crystal medium according to in preparation of a liquid ...

Difluoromethoxy-bridge liquid crystal compound containing methyl-substituted 2,3-difluorophenyl and crystal composition

Provided are a difluoromethoxy-bridge liquid crystal compound containing methyl-substituted 2,3-difluorophenyl, a liquid crystal composition containing the compound, and a liquid crystal display element and a liquid crystal display, wherein said liquid crystal composition is represented by the following formula I: wherein the difluoromethoxy-bridge liquid crystal compound containing methyl-substituted 2,3-difluorophenyl not only has a high clearing point (CP) and a prominent low-temperature miscibility with other liquid crystals, but also has a good stability to ultraviolet light, stability to high temperatures, and particularly also a high vertical dielectric constant (ε ⊥ ), and may be applied to the formulation of various types of liquid crystal compositions, and it is particularly prominent that the compound has the advantages of both a good low-temperature miscibility and a high vertical dielectric constant (ε ⊥ ).

LIQUID CRYSTAL COMPOSITION, LIQUID CRYSTAL DISPLAY ELEMENT AND LIQUID CRYSTAL DISPLAY

Disclosed are a liquid crystal composition, a liquid crystal display element, and a liquid crystal display, said liquid crystal composition comprising one or more compounds represented by formula I, one or more compounds represented by formula II, one or more compounds represented by formula III and one or more compounds represented by formula IV, 3. The liquid crystal composition according to claim 1 , wherein in said liquid crystal composition claim 1 , the total content in mass percentage of said one or more compounds represented by formula I is 1-40% claim 1 , the total content in mass percentage of said one or more compounds represented by formula II is 1-40% claim 1 , the total content in mass percentage of said one or more compounds represented by formula III is 1-80% claim 1 , and the total content in mass percentage of said one or more compounds represented by formula IV is 0.5-30%.10. A liquid crystal display element or liquid crystal display comprising the liquid crystal composition of claim 1 , wherein said liquid crystal display element or liquid crystal display is an active matrix display element or display or a passive matrix display element or display. The present invention belongs to the technical field of liquid crystal materials, and particularly relates to a liquid crystal composition and a liquid crystal display element or liquid crystal display comprising the liquid crystal composition.At present, liquid crystal display technologies have been maturely used in various display devices, have become a mainstream for products in the information display field, and have been widely used in various displays such as instruments and apparatuses, computers, televisions and mobile phones. According to the difference in the liquid crystal display mode, liquid crystal display devices can be classified into a plurality of modes, such as a twisted nematic phase (TN) mode, a super twisted nematic phase (STN) mode, a coplanar (IPS) mode, and a vertical alignment ...

CHIRAL COMPOUND, LIQUID CRYSTAL COMPOSITION CONTAINING THE SAME, OPTICALLY ANISOTROPIC BODY, AND LIQUID CRYSTAL DISPLAY DEVICE

Disclosed are a chiral compound, a liquid crystal composition containing the chiral compound, an optically anisotropic body and a liquid crystal display device. The structural formula of said chiral compound is as represented by the following formula I: 5. A liquid crystal composition claim 1 , characterized in that said liquid crystal composition comprises at least one chiral compound of .6. An optically anisotropic body claim 5 , characterized in that said optically anisotropic body is obtained by polymerizing the liquid crystal composition according to .7. A liquid crystal display device claim 1 , characterized in that said liquid crystal display device comprises the chiral compound of claim 1 , a liquid crystal composition comprising the chiral compound claim 1 , or an optically anisotropic body obtained by polymerizing the liquid crystal composition.8. The liquid crystal display device according to claim 7 , characterized in that said liquid crystal display device is a TN claim 7 , AMD-TN claim 7 , STN claim 7 , PS-VA claim 7 , PSA-VA claim 7 , PS-IPS claim 7 , PSA-IPS claim 7 , PS-FFS claim 7 , PSA-FFS claim 7 , multi-stable claim 7 , blue-phase claim 7 , 3D or TFT display. The present invention relates to the technical field of liquid crystal materials. More specifically, the present invention relates to a chiral compound, a liquid crystal composition containing the chiral compound, an optically anisotropic body, and a liquid crystal display device.Liquid crystals have a variety of phase states, such as a smectic phase arranged in a lamellar manner, a nematic phase and a cholesteric phase with a helical structure, wherein the nematic liquid crystals can be further classified according to the relative orientation of molecules, and the smectic phase is the most common arrangement manner, in which the molecules are arranged in layers. Another common phase is the cholesteric phase, or referred to as a chiral nematic phase, in which the orientation of each layer ...

LIQUID CRYSTAL COMPOUND CONTAINING 2,3,4-TRISUBSTITUTED BENZENE AND COMPOSITION THEREOF

Provided is a liquid crystal compound containing 2,3,4-trisubstituted benzene, a liquid crystal composition thereof, and a liquid crystal display element or a liquid crystal display comprising the liquid crystal compound or the liquid crystal composition, wherein the liquid crystal composition has a lower viscosity, can achieve a quick response, and further has a moderate dielectric anisotropy Δϵ, a moderate optical anisotropy Δn, and high stability to heat and light. The liquid crystal display element or liquid crystal display comprising the liquid crystal composition has the properties of a wider nematic phase temperature range, an appropriate birefringence anisotropy, a very high electrical resistivity, a good ultraviolet resistant property, a high charge retention rate, a low vapor pressure etc., and particularly, the liquid crystal compound or the liquid crystal composition has the advantage of a high light transmittance. 3. The liquid crystal composition according to claim 1 , wherein in said liquid crystal composition claim 1 , the total content in mass percentage of the compounds represented by formula I is 0.5-50% claim 1 , the total content in mass percentage of the compounds represented by formula II-B is 5-65% claim 1 , and the total content in mass percentage of the compounds represented by formula II except the compounds represented by formula II-B is 0-30%.12. A liquid crystal display element or liquid crystal display comprising the liquid crystal compound or liquid crystal composition of claim 1 , wherein said liquid crystal display element or liquid crystal display is an active matrix display element or display or a passive matrix display element or display.15. A liquid crystal display element or liquid crystal display comprising the liquid crystal compound or liquid crystal composition of claim 10 , wherein said liquid crystal display element or liquid crystal display is an active matrix display element or display or a passive matrix display ...

Liquid crystal composition having a negative dielectric anisotropy

Es wird eine Flüssigkristallzusammensetzung mit einer negativen dielektrischen Anisotropie offenbart. Die Flüssigkristallzusammensetzung umfasst Verbindungen gemäß Formeln I bis IV. Die Zusammensetzung hat einen geringen Spannungsgrenzwert, eine geringe rotatorische Viskosität, einen hohen Grenzwiderstand, ein hohes Spannungshalteverhältnis und eine gute Hochtemperatur- und UV-Stabilität. Das LC-Medium hat den Vorteil einer offensichtlich verminderten Reaktionszeit nach Polymerisation unter UV-Bestrahlung und ist somit für Anwendungen von großem Wert.

Highly vertical dielectric liquid crystal composition and liquid crystal display device

A liquid crystal composition having one or more compounds represented by formula I, one or more compounds represented by formula II and one or more compounds represented by formula III: The liquid crystal composition has a good stability against light and heat and a lower viscosity, and can achieve a wider refractive index and higher clearing point by the adjustment the ratio of the monomers. In particular, the liquid crystal composition has a higher light transmittance, allowing a display device to have a higher brightness or an energy saving effect.

Liquid crystal compound containing 2,3,4-trisubstituted benzene and composition thereof

Provided is a liquid crystal compound containing 2,3,4-trisubstituted benzene, a liquid crystal composition thereof, and a liquid crystal display element or a liquid crystal display comprising the liquid crystal compound or the liquid crystal composition, wherein the liquid crystal composition has a lower viscosity, can achieve a quick response, and further has a moderate dielectric anisotropy Δε, a moderate optical anisotropy Δn, and high stability to heat and light. The liquid crystal display element or liquid crystal display comprising the liquid crystal composition has the properties of a wider nematic phase temperature range, an appropriate birefringence anisotropy, a very high electrical resistivity, a good ultraviolet resistant property, a high charge retention rate, a low vapor pressure etc., and particularly, the liquid crystal compound or the liquid crystal composition has the advantage of a high light transmittance.

Compound, liquid crystal medium containing same, and use thereof

Liquid crystal compounds comprising a cyclopentyl group and a difluoromethyleneoxy linker group and their applications

Die Erfindung betrifft Flüssigkristallverbindungen gemäß Formel I, umfassend eine Cyclopentyl-Gruppe und eine Difluoromethylenoxy-Verbindungs-Gruppe. Flüssigkristallverbindungen gemäß Formel I haben nicht nur eine hohe dielektrische Anisotropie, sondern auch einen hohen Klärpunkt und eine hohe Reaktionszeit und sind somit von großer Bedeutung für die Formulierung von Flüssigkristallzusammensetzungen. The invention relates to liquid-crystal compounds of the formula I which comprise a cyclopentyl group and a difluoromethyleneoxy compound group. Liquid crystal compounds according to formula I not only have a high dielectric anisotropy but also a high clearing point and a high reaction time and are thus of great importance for the formulation of liquid crystal compositions.

Negative dielectric anisotropic liquid crystal compounds containing 2,3-difluorophenyl group, and preparation method and use thereof

A negative dielectric anisotropic liquid crystal compound containing 2,3-difluorophenyl, and a preparation method and use thereof are disclosed. The compound has a general structural formula as shown in Formula I. The negative dielectric anisotropic liquid crystal compound has a negative dielectric anisotropy (Δ∈), and has cyclobutyl or cyclopentyl as a terminal group. Compared with conventional liquid crystal compounds with a flexible alkyl chain as a terminal group, the compound of Formula I according to the present invention has the advantage of high clearing point, and enables extension of the application range of a liquid crystal mixture because a positive correlation exists between the clearing points of the liquid crystal mixture and monomer liquid crystal compounds. In addition, the compound can increase the absolute value of the negative dielectric constant of the liquid crystal mixture, thus having an important application value.

Liquid crystal display device

The present invention relates to a liquid crystal display device. The liquid crystal display device of the present invention comprises a first substrate, a second substrate, and a liquid crystal composition disposed between said first substrate and said second substrate, wherein said first substrate and said second substrate are disposed in parallel and opposite to each other; alignment layers are disposed on the sides of said first and second substrates that are close to said liquid crystal composition; and said alignment layers are provided with vertical alignment films that allow liquid crystal molecules in said liquid crystal composition to be arranged roughly perpendicular to said first and second substrates, with said liquid crystal molecules having a pretilt angle of 88.5° to 89.5°.

Liquid crystal composition and application thereof

Disclosed is a liquid crystal composition and use thereof. The liquid crystal composition comprises components a, b and c; wherein component a is selected from one of the compounds represented by formula I; component b is a liquid crystal composition having a dielectric anisotropy of greater than 3; and component c is a liquid crystal composition having a dielectric anisotropy of −3 to 3. The liquid crystal composition has a high contrast ratio property, and has a low change rate at a low temperature, that is, the decrease of contrast ratio at a low temperature (such as −20° C.) is smaller as compared to a normal temperature. The composition has suitable properties with regard to practical applications, including a broader nematic phase range, an appropriate dielectric anisotropy, optical anisotropy and operating voltage, an excellent response time, a high electrical resistivity and voltage holding ratio, a low rotary viscosity, etc.

Compound, liquid crystal medium containing same, and use thereof

Polymerizable compound, liquid crystal medium containing same and liquid crystal display device

Disclosed is a polymerizable compound having a structural formula as represented by the following formula I: The polymerizable compound disclosed in the present invention has a plurality of ring systems, and the entire molecular structure thereof is curved and twisted. The present invention further discloses a liquid crystal medium comprising the polymerizable compound, the polymerizable compound provided by the present invention has an appropriate polymerization rate in the liquid crystal medium, and the liquid crystal medium can be well applied to a PS-(polymer stabilized)- or PSA-(polymer stabilized alignment)-type liquid crystal display device. Further disclosed is a liquid crystal display device prepared from the liquid crystal medium.

Difluoromethoxy-bridge liquid crystal compound containing methyl-substituted 2,3-difluorophenyl and crystal composition

Provided are a difluoromethoxy-bridge liquid crystal compound containing methyl-substituted 2,3-difluorophenyl, a liquid crystal composition containing the compound, and a liquid crystal display element and a liquid crystal display, wherein said liquid crystal composition is represented by the following formula I:wherein the difluoromethoxy-bridge liquid crystal compound containing methyl-substituted 2,3-difluorophenyl not only has a high clearing point (CP) and a prominent low-temperature miscibility with other liquid crystals, but also has a good stability to ultraviolet light, stability to high temperatures, and particularly also a high vertical dielectric constant (ε⊥), and may be applied to the formulation of various types of liquid crystal compositions, and it is particularly prominent that the compound has the advantages of both a good low-temperature miscibility and a high vertical dielectric constant (ε⊥).

Liquid crystal composition and liquid crystal display element

Provided are a polymerizable compound represented by formula I and a liquid crystal composition formed by combining such a polymerizable compound with a specific liquid crystal component, particularly a PSVA liquid crystal composition for displays or TV applications and a PSA-IPS liquid crystal composition for an IPS mode; in particular, the polymerizable compound has a faster polymerization rate, and a “material system” formed from the selected polymerizable component and liquid crystal component has a low rotary viscosity and good photoelectric properties, and has a high VHR after (UV) photoradiation, this avoiding the problem of the occurrence of residual images to final displays.

Liquid crystal composition, liquid crystal display element and liquid crystal display

The present invention belongs to the technical field of liquid crystal materials, and in particular relates to a liquid crystal composition and a liquid crystal display element or liquid crystal display containing the liquid crystal composition. The present invention discloses a liquid crystal composition, comprising one or more compounds represented by Formula I, one or more compounds represented by Formula II, and one or more compounds represented by Formula III. The liquid crystal composition of the present invention has a large optical anisotropy and a small ratio of γ 1 /K 11 , and can be used for developing a liquid crystal display element or liquid crystal display with a low cell thickness and a fast response.

Liquid crystal composition, liquid crystal display element and liquid crystal display

The present invention belongs to the technical field of liquid crystal materials, and in particular relates to a liquid crystal composition and a liquid crystal display element or liquid crystal display containing the liquid crystal composition. The present invention discloses a liquid crystal composition, comprising one or more compounds represented by Formula I, one or more compounds represented by Formula II, and one or more compounds represented by Formula III. The liquid crystal composition of the present invention has a large optical anisotropy and a small ratio of γ1/K11, and can be used for developing a liquid crystal display element or liquid crystal display with a low cell thickness and a fast response.

Chiral compound, liquid crystal composition containing the same, optically anisotropic body, and liquid crystal display device

Disclosed are a chiral compound, a liquid crystal composition containing the chiral compound, an optically anisotropic body and a liquid crystal display device. The structural formula of said chiral compound is as represented by the following formula I: The chiral compound has a high HTP value and a good solubility; a highly helical, twisted liquid crystal composition can be prepared by adding a small amount of the chiral compound; reducing the addition amount of the chiral compound can reduce the negative effect of the chiral compound on the parameters of the liquid crystal composition; under the conditions of the same addition ratio and the same helical pitch, the chiral compound can reduce the response time of the liquid crystal composition; in addition, the chiral compound has a simple structure and greatly reduces the synthesis cost.

Liquid crystal composition

A liquid crystal composition having one or more compounds shown as formula I and one or more compounds shown as formula II, and the liquid crystal composition comprising a compound shown as formula II-A: wherein substituents are all defined. The composition has a low viscosity γ 1 , a moderate dielectric anisotropy Δε and a moderate optical anisotropy Δn, and can achieve fast response of a liquid crystal display.

Liquid Crystal compound containing cyclobutyl group and difluoromethyleneoxy linking group, and preparation method and use thereof

A liquid crystal compound containing cyclobutyl and a linking group difluoromethyleneoxy, and a preparation method and use thereof are disclosed. The compound is as shown in Formula I. The liquid crystal compound containing cyclobutyl as a terminal group and difluoromethyleneoxy (—CF 2 O—) as a linking group in the molecular structure of Formula I according to the present invention, has not only a high dielectric anisotropy, but also importantly an extremely fast response speed and a high clearing point, which are of great significance for the formulation of a liquid crystal mixture.