CN111575022A - Negative liquid crystal composition with terminal alkene structure and application thereof - Google Patents
Negative liquid crystal composition with terminal alkene structure and application thereof Download PDFInfo
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- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
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Abstract
The invention relates to a negative liquid crystal composition with a terminal olefin structure and application thereof. The liquid crystal composition contains liquid crystal compounds with general formulas I, II, III, IV and V. The negative liquid crystal composition has negative dielectric anisotropy, high steepness, particularly low viscosity and short response time, has good stability and low-temperature intersolubility, strong UV resistance, high VHR and resistivity, and can be applied to display modes such as VA, MVA, PVA, FFS, PSVA, IPS, TFT and the like.
Description
Technical Field
The invention relates to a liquid crystal composition, in particular to a negative liquid crystal composition with a terminal olefin structure.
Background
Liquid crystal display technology has been widely used in today's society for various size displays. Small size displays such as calculators, cell phones, meters, etc.; medium size displays such as computer monitors; large size displays such as televisions. The liquid crystal display has the advantages of high resolution, high brightness, flat display and the like, and is light in weight, low in energy consumption and even flexible display. Therefore, liquid crystals will continue to play an important role in the information technology age.
An early liquid crystal display mode is TN display, people use the combination of TN electro-optic effect and an integrated circuit to make the liquid crystal display device (TN-LCD), and thus the liquid crystal display device has a wide prospect for the application of liquid crystal. TN-LCD has been developed slowly since the large-scale industrial production, STN-LCD and TFT-LCD technology has become mature, display mode types have increased, and liquid crystal media with negative dielectric anisotropy, such as ECB, DAP, VAN, MVA, ASV, PVA, etc., appear.
Compared to the conventional display mode, some liquid crystal media having negative dielectric anisotropy, such as ECB (electrically controlled birefringence) and its derivative modes DAP (deformation of aligned phase), VAN (vertically aligned nematic phase), MVA (multi-domain vertical alignment), ASV (advanced super view), PVA (mode vertical alignment), have been developed. The contrast is highly dependent for the TN type display. In addition, VA displays are known to have a wide viewing angle. The LC layer of the VA display comprises a liquid crystalline medium having a negative dielectric anisotropy, sandwiched between two transparent electrodes. In the off state, the LC layer molecules are aligned perpendicular to the electrode surface with a pre-tilt angle, and when a voltage is applied across the electrode, the LC molecules are realigned parallel to the electrode surface. The VA display has a wider viewing angle than the ECB display and is not dependent on contrast.
The pre-search response time for liquid crystals is too long and the viscosity needs to be improved. This is influenced by the rotational viscosity γ 1, especially at low temperatures. The reduction in the flow viscosity v 20 results in a very short response time for homeotropically aligned edge aligned liquid crystals (e.g. ECB and VAN displays).
Currently, the popular Wide viewing angle technologies mainly include TN + Wide Film, VA, including PVA, MVA, PSVA, IPS, FFS, and the like. Because the vertical alignment liquid crystal display has excellent performances such as higher contrast ratio, quick response and the like, the VA type liquid crystal panel is widely applied to the current display products, and the 16.7M color and the large visual angle are the most obvious technical characteristics.
There are various display modes on the market, and the dominant ones with competitive power are in-plane switching (IPS) fringe-field switching (FFS), Vertical Alignment (VA), and the like. In these display modes, in-plane switching (IPS) and Fringe Field Switching (FFS) are both characterized by a wide viewing angle. When the positive liquid crystal is used in an IPS/FFS display mode, a fast response can be obtained and good reliability is obtained; the negative liquid crystal can obtain higher transmittance when used in an IPS/FFS display mode, but the negative liquid crystal has higher viscosity and therefore has lower response speed.
In the current wide viewing angle display mode IPS in-plane switching (IPS) and fringe-field switching (FFS), the difference in light transmittance between the positive liquid crystal and the negative liquid crystal is mainly reflected in the transmittance efficiency of the liquid crystal at the center of the pixel electrode gap. Because, in the center of the pixel electrode interval, the elastic force for the positive liquid crystal molecules to rotate is weaker than that of the negative liquid crystal. If the positive liquid crystal is to obtain the same light use efficiency, the value of Δ nd is larger than that of the negative liquid crystal. Therefore, for the above two modes, the previous solution is that increasing the transmittance from the liquid crystal perspective can add a negative component to a positive liquid crystal.
IPS (in-plane switching) displays are also popular, comprising an LC layer between two substrates, on one of which two electrodes are arranged, staggered with respect to each other, in a comb structure. When a voltage is applied to the electrodes, an electric field parallel to the LC layer is generated between the LC layers, so that the LC molecules are rearranged.
In the IPS display technology, liquid crystal molecules are not oriented in advance to a light transmissive mode, but are oriented to a light opaque mode, and the amount of light transmission is determined by electrodes perpendicular to the orientation direction of the liquid crystal molecules, and the higher the voltage is, the more twisted molecules are, thereby realizing precise control of light. It only controls one deflection angle of IPS liquid crystal panel, and the quantity of deflection molecules can be close to direct proportion to voltage, so that the hierarchical control of the panel can be realized more easily.
Compared with the traditional soft screen liquid crystal, the IPS hard screen has the obvious advantages of stable liquid crystal molecule arrangement structure and higher response speed, so that the IPS hard screen has super expressive force on the dynamic definition, the phenomena of blurring and water streak diffusion when the soft screen liquid crystal display screen is subjected to external pressure and swaying are completely eliminated, and the ghost shadow and the tailing are avoided when an extremely fast picture is played. It is expected that the IPS display technology is increasingly widely used in various fields.
For IPS display technology, new liquid-crystalline media with improved properties are required. For the application field of dynamic display, it is particularly necessary to improve the response time and reduce the driving voltage, and for the application in special fields, it is also necessary to increase the operating temperature range. Therefore, low rotational viscosity, large dielectric anisotropy, high clearing point, and large K value are required. Preferably, the dielectric should be higher than 4, very preferably higher than 5, then preferably not higher than 12, in particular not higher than 15, since this is detrimental for a reasonably high resistivity, having an impact on the quality reliability of the liquid crystal material.
Liquid crystal compositions suitable for LCDs and in particular for IPS displays are known, for example, from the following documents: EP0667555, DE19509410, DE19528106, JP07-181439(A), WO9623851 and the like. These compositions then have significant disadvantages. They mostly result in, among other disadvantages, disadvantageously long response times, have too low resistivity values, and/or require too high operating voltages.
Later, FFS (fringe-field switching) displays were proposed, which also included two electrodes on the same substrate, only one electrode being arranged in a comb structure and the other being unstructured, in contrast to IPS displays. A strong fringing field is thus formed, the electric field being near the electrode edge, throughout the layer structure, which is strong in both the horizontal and vertical directions. Both IPS and FFS displays have low viewing angle dependence on contrast.
The alignment of current VA display type LC molecules limits many rather small areas in the LC layer. Disclination, such as tilt, may occur in these areas. Compared with the conventional VA display, the VA display with the inclined domains has wider viewing angle and does not depend on contrast and gray scale. This type of VA display allows the rearrangement of the molecules in the on-state to be more easily achieved, thus eliminating the need for rubbing of the cell and allowing the pretilt angle orientation to be controlled by the specific design of the electrodes.
The mva (multidomain vertical alignment) display is a display in which local tilt is caused by electrodes having projections. The LC molecules are aligned parallel to the electrode surface in different regions in different directions after the application of voltage, preventing the disclination. Although this arrangement improves the display viewing angle, light transmission is reduced. With the further development of MVA, projections were used only on one side electrode, while the other side electrode had slits, facilitating the transmission of light. The slit electrodes form an uneven electric field after voltage is applied, and the switching state can still be controlled. In order to further increase the light transmittance, the separation slit and the protrusion may be enlarged, which results in an increase in response time. The PVA display has a complete redundancy of protrusions on the electrodes, which are structured by slits, which increases the contrast and improves the light transmission, but this technique is very difficult and the display is also more sensitive to mechanical forces. For many applications, such as displays, tv screens, short response times, high contrast, brightness of the display are required.
PSA shows that the liquid-crystalline medium comprises a liquid-crystalline phase and a small amount of polymeric compound, in a mass fraction of 0.2 to 0.4%. After the liquid crystal medium is filled into the display cell, the polymer compound is polymerized and crosslinked by UV polymerization, and display is performed by applying a voltage to the electrodes. The added polymer monomers are generally referred to as Reactive monomers or "RMs" (Reactive monomers).
The PSA mode is widely used for a variety of conventional liquid crystal type displays. For example: PS-VA (polymerized vertical alignment), PS-OCB (polymerized compensated bend), PS-IPS (in-plane switching), PS-FFS (fringe-field switching), PS-TN (twisted nematic), wherein the polymerization process of the polymeric compound occurs under energization in the PSA-VA and PSA-OCB displays, and occurs without energization in the PSA-IPS displays. The PSA mode can form a pretilt angle, and the PSA-OCB shows that the bending structure is very stable without applying a compensation voltage. PSA-VA shows that the pretilt angle has a positive effect on the response time.
With the development of display technology, people have higher and higher requirements on display devices, and increasing the response speed of liquid crystal display devices is an important way to achieve the requirements, while the response speed of liquid crystal displays is mainly limited by the dielectric anisotropy of liquid crystals, the thickness of liquid crystal boxes and the rotational viscosity of liquid crystals, so that research and development of novel liquid crystal products, reduction of the viscosity of liquid crystals and improvement of negative dielectric anisotropy of liquid crystals become more and more important.
Therefore, there is a significant need for liquid-crystalline media having suitable properties for practical use, such as a wide operating range, suitable optical anisotropy, depending on the display mode, high dielectric anisotropy and in particular low rotational viscosity.
Liquid crystal materials are key optoelectronic materials for liquid crystal displays. The advent and development of liquid crystal materials are closely linked with the advent and development of liquid crystal display technologies. The properties of any organic compound depend on the structure of its molecules, and liquid crystal compounds are no exception, and the properties of liquid crystal compounds are determined by the molecular structure of the liquid crystal compounds. The molecular structure of the monomer liquid crystal compound mainly comprises a central group, a terminal group, a connecting group and a lateral group. Generally, one can change a certain physical property parameter of the monomeric liquid crystal compound by controlling the introduction of different structural functional groups (e.g., introducing polar groups at the ends of the molecular structure to change the dielectric constant of the compound, and using groups with large aspect ratio in the linking group is beneficial to increase the phase transition temperature). Therefore, in recent years, the recognition and development of monomeric liquid crystal compounds have been advanced greatly. In order to meet the requirements of displaying various performance parameters of liquid crystal materials, people are required to mix a plurality of monomer liquid crystal compounds together to achieve the optimization of the performance.
Although the liquid crystal composition with extremely large negative dielectric anisotropy exists in the prior art, the characteristics of high gradient, low power consumption and fast response cannot be simultaneously considered, such as: the compound proposed in CN108315017 has a very large absolute value of negative dielectric anisotropy, but with the continuous progress of technology, the steepness, response speed, power consumption, etc. cannot fully meet the market demand.
Disclosure of Invention
In view of the above-mentioned deficiencies of the prior art, the present invention provides a negative liquid crystal composition having a terminal ene structure. The negative liquid crystal composition has a large absolute value of negative dielectric anisotropy, a high gradient, a quick response, good low-temperature stability and UV resistance, and is mainly applied to display modes such as VA, MVA, PVA, FFS, PSVA, IPS, TFT and the like.
A negative liquid crystal composition with a terminal olefin structure, which comprises liquid crystal compounds with the following general formulas I, II, III, IV and V:
wherein R is1、R2、R3、R4、R5、R6、R7、R8、R9、R10Each independently selected from a substituted or unsubstituted straight or branched chain alkyl, alkoxy or ether oxygen radical of C1-C15, a substituted or unsubstituted straight or branched chain alkenyl or alkenyloxy radical of C2-C15, a substituted or unsubstituted cycloalkyl radical of C3-C5, wherein the substituents are selected from F, Cl, Br, I, O, S, CN, OH, -CH ═ CH-, C ≡ C-;
rings A, B, C, D, E, F, G, H each independently represent a cyclohexyl group, a phenylene group, a phenyl group, an oxygen-containing hexacyclic group, or a substituted phenylene group; wherein the substituent is selected from F, Cl, Br, I and CN;
L1、L2、L3each independently represents H, F, S, CN, Cl, Br, I, alkyl or alkoxy of C1-C3, CF3、CF3O；
m, n, p, q each independently represent 0 or 1;
Z1、Z2selected from-CH 2CH2-, -C.ident.C-, -CH ═ CH-, -CF ═ CF-, -COO-, -OCO-, -OOC-, -CF2O-、-CH2O-。
The compound of the general formula I accounts for 1-60% of the total mass of the negative liquid crystal composition;
the compound of the general formula II accounts for 1-50% of the total mass of the negative liquid crystal composition;
the compound of the general formula III accounts for 1-50% of the total mass of the negative liquid crystal composition;
the compound of the general formula IV accounts for 1-40% of the total mass of the negative liquid crystal composition;
the compound of the general formula V accounts for 1-10% of the total mass of the negative liquid crystal composition.
Preferably, the compound of formula i is selected from at least one of the following structural formulae:
preferably, the compound of formula ii is selected from at least one of the following structural formulae:
preferably, the compound of formula iii is selected from at least one of the following structural formulae:
preferably, the compound of formula iv is selected from at least one of the following structural formulae:
preferably, the compound of formula iv is selected from at least one of the following structural formulae:
preferably, the compound of formula v is selected from at least one of the following structural formulae:
the invention provides a liquid crystal display device, which comprises the negative liquid crystal composition with the terminal alkene structure.
The invention provides an application of a liquid crystal display in VA, MVA, PVA, FFS, PSVA, IPS and TFT display modes.
Has the advantages that:
the liquid crystal composition provided by the invention has proper threshold voltage, larger absolute value of negative dielectric anisotropy, high gradient, good stability and low-temperature intersolubility, higher clearing point, wider nematic phase temperature range, shorter response time, high VHR and resistivity, and good UV resistance, and is mainly applied to display modes such as VA, MVA, PSA, IPS, FFS, TFT and the like.
The liquid crystal composition provided by the invention has a nematic phase temperature range: -40-120 ℃. Storing at-40 deg.C, -30 deg.C, -20 deg.C, 0 deg.C for more than 1 month. Normal at high temperature, no bad display phenomenon below 10 ℃ lower than the clearing point.
The flowing viscosity of the liquid crystal composition provided by the invention at 20 ℃ is measured by using a rotary rotor viscometer, and v 20 of the liquid crystal composition at 20 ℃ is less than or equal to 100 mPas.
The liquid crystal composition provided by the invention has delta n of 0.07-0.27.
The liquid crystal composition provided by the invention has dielectric anisotropy delta of-3 to-16.
The rotational viscosity of the liquid crystal composition provided by the invention at 20 ℃ is tested by using an INSTEC physical property tester of American INSTEC (China constant quotient), the model of ALCT-PP1 is that gamma 1 is less than or equal to 300 mPa.s.
The liquid crystal composition provided by the invention has a lower threshold voltage of 1.2-2.5V. Has high VHR before and after UV.
Detailed Description
The invention relates to a negative liquid crystal composition with a terminal alkene structure, which has negative dielectric anisotropy based on a polar compound, has a clearing point of more than 70 ℃, and has good gradient. The invention ensures that the display can have a short response time at very high or very low temperatures, while improving stability, especially without image sticking over long periods of operation.
The liquid crystal composition provided by the invention is prepared by adopting a traditional method, and is prepared by mixing two or more compounds at a proper temperature; or dissolving the components in an organic solvent such as acetone, chloroform, methanol, etc., and removing the solvent by distillation.
The liquid crystal composition provided by the invention also needs to be added with proper additives, such as an anti-ultraviolet agent, an antistatic agent, an antioxidant, an antifoaming agent and the like.
The present invention is described below with reference to specific embodiments. The following examples are illustrative of the present invention and are intended to illustrate the invention without limiting it. Other combinations and various modifications within the spirit or scope of the present invention may be made without departing from the spirit or scope of the present invention.
The present invention is illustrated and explained below with reference to formulation examples, but the present invention is not limited thereto, and other combinations and various modifications within the concept of the present invention can be made without departing from the spirit or scope of the present invention.
The ingredients used in the following examples can be obtained by conventional methods.
The liquid crystal compositions in the following examples were prepared by a conventional method.
The liquid crystal composition in the following examples was tested by a conventional method to obtain various performance parameters, and the liquid crystal display material includes upper and lower glass substrates carrying transparent electrodes and a liquid crystal medium sandwiched therebetween.
The percentages in the examples represent percentages by weight, unless otherwise specified.
Cp (. degree. C.) represents the clearing point.
DELTA.n represents the optical anisotropy at 20 ℃ of 589 nm.
Δ represents the dielectric anisotropy at 25 ℃.
γ 1 (mPas) represents the rotational viscosity at 20 ℃.
Vo (V) represents the threshold voltage at 20 ℃.
a (%) represents (V)1-V0)/V0*100％，V1(V) represents the saturation voltage at 20 ℃.
Example E1:
TABLE 1 formulation composition and parameters for example E1
Example E2:
TABLE 2 formulation composition and parameters for example E2
Example E3:
TABLE 3 formulation composition and parameters for example E3
Example E4:
TABLE 4 formulation composition and parameters for example E4
Example E5:
TABLE 5 formulation composition and parameters for example E5
Example E6:
TABLE 6 formulation composition and parameters for example E6
Example E7:
TABLE 7 formulation compositions and parameters for example E7
Example E8:
TABLE 8 formulation composition and parameters for example E8
Example E9:
TABLE 9 formulation compositions and parameters for example E9
Example E10:
TABLE 10 formulation compositions and parameters for example E10
Example E11:
TABLE 11 formulation compositions and parameters for example E11
Example E12:
TABLE 12 formulation compositions and parameters for example E12
Example E13:
TABLE 13 formulation compositions and parameters for example E13
Example E14:
TABLE 14 formulation compositions and parameters for example E14
Example E15:
TABLE 15 formulation compositions and parameters for example E15
Cp, △ n, V can be seen with reference to the above examples0In the similar situation, the more the content of the terminal olefin structure is, the smaller the gamma 1 and a values are, the higher the gradient is, the smaller the rotational viscosity is, and the more suitable for the VA type liquid crystal display with high driving path number is.
Comparative example M1:
TABLE 16 formulation composition and parameters for comparative example M1
Referring to the above example, inventive example E4 compares to comparative example M1 at Cp, △ n, V0The E4 has a lower rotational viscosity and a higher steepness, close to △ both samples were poured into the same VA liquid crystal cell under the same conditions and the power consumption after 6min and the high temperature power consumption at 60 ℃ were measured in comparison, the UV wavelength being 365nm, and the data were obtained as follows:
according to the data, the post-UV power consumption and high temperature power consumption of the formulation E4 of the present application are significantly improved over the comparative example M1.
Referring to the above examples, the liquid crystal composition provided by the present invention has a large absolute value of negative dielectric anisotropy, a high steepness, a high clearing point, a proper optical anisotropy, a wide temperature range of nematic terms, and simultaneously has low viscosity, low power consumption and a fast response speed. Can be used for display modes such as VA, MVA, PVA, PSVA, IPS, FFS, TFT and the like.
The present invention may be embodied in other specific forms without departing from its spirit or essential characteristics. The above-described embodiments of the invention are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims, and not by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (9)
1. A negative liquid crystal composition with a terminal olefin structure is characterized in that the liquid crystal composition comprises liquid crystal compounds with the following general formulas I, II, III, IV and V:
wherein R is1、R2、R3、R4、R5、R6、R7、R8、R9、R10Each independently selected from a substituted or unsubstituted straight or branched chain alkyl, alkoxy or ether oxygen radical of C1-C15, a substituted or unsubstituted straight or branched chain alkenyl or alkenyloxy radical of C2-C15, a substituted or unsubstituted cycloalkyl radical of C3-C5, wherein the substituents are selected from F, Cl, Br, I, O, S, CN, OH, -CH ═ CH-, C ≡ C-;
rings A, B, C, D, E, F, G, H each independently represent a cyclohexyl group, a phenylene group, a phenyl group, an oxygen-containing hexacyclic group, or a substituted phenylene group; wherein the substituent is selected from F, Cl, Br, I and CN;
L1、L2、L3each independently represents H, F, S, CN, Cl, Br, I, alkyl or alkoxy of C1-C3, CF3、CF3O；
m, n, p, q each independently represent 0 or 1;
Z1、Z2selected from-CH 2CH2-, -C.ident.C-, -CH ═ CH-, -CF ═ CF-, -COO-, -OCO-, -OOC-, -CF2O-、-CH2O-。
The compound of the general formula I accounts for 1-60% of the total mass of the negative liquid crystal composition;
the compound of the general formula II accounts for 1-50% of the total mass of the negative liquid crystal composition;
the compound of the general formula III accounts for 1-50% of the total mass of the negative liquid crystal composition;
the compound of the general formula IV accounts for 1-40% of the total mass of the negative liquid crystal composition;
the compound of the general formula V accounts for 1-10% of the total mass of the negative liquid crystal composition.
2. The negative liquid crystal composition of claim 1, wherein the compound of formula i is selected from at least one of the following structural formulas:
3. the negative liquid crystal composition of claim 1, wherein the compound of formula ii is selected from at least one of the following structural formulas:
4. the negative liquid crystal composition according to claim 1, wherein the compound of formula iii is selected from at least one of the following structural formulae:
5. the negative liquid crystal composition according to claim 1, wherein the compound of formula iv is selected from at least one of the following structural formulae:
6. the negative liquid crystal composition according to claim 1, wherein the compound of formula iv is selected from at least one of the following structural formulae:
7. the negative liquid crystal composition according to claim 1, wherein the compound of formula V is selected from at least one of the following structural formulae:
8. a liquid crystal display device comprising the negative liquid crystal composition having a terminal olefin structure according to any one of claims 1 to 7.
9. Use of a liquid crystal display according to claim 8 in VA, MVA, PVA, FFS, PSVA, IPS, TFT display mode.
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Cited By (6)
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| CN112143508A (en) * | 2020-10-09 | 2020-12-29 | 烟台显华化工科技有限公司 | Liquid crystal compound with negative dielectric anisotropy, liquid crystal composition and liquid crystal display device |
| CN114196421A (en) * | 2020-09-17 | 2022-03-18 | 江苏和成显示科技有限公司 | Liquid crystal composition and liquid crystal display device thereof |
| CN114369466A (en) * | 2021-11-11 | 2022-04-19 | 烟台显华科技集团股份有限公司 | Negative dielectric anisotropy liquid crystal composition with high gradient and application thereof |
| CN114574219A (en) * | 2020-12-01 | 2022-06-03 | 江苏和成显示科技有限公司 | Liquid crystal composition and liquid crystal display device thereof |
| CN115216307A (en) * | 2021-04-15 | 2022-10-21 | 河北迈尔斯通电子材料有限公司 | Low-threshold low-power-consumption low-viscosity liquid crystal composition |
| CN116814277A (en) * | 2023-08-29 | 2023-09-29 | 烟台显华科技集团股份有限公司 | High-gradient high-brightness negative dielectric anisotropy liquid crystal composition and application thereof |
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| CN114196421A (en) * | 2020-09-17 | 2022-03-18 | 江苏和成显示科技有限公司 | Liquid crystal composition and liquid crystal display device thereof |
| CN112143508A (en) * | 2020-10-09 | 2020-12-29 | 烟台显华化工科技有限公司 | Liquid crystal compound with negative dielectric anisotropy, liquid crystal composition and liquid crystal display device |
| CN112143508B (en) * | 2020-10-09 | 2022-03-18 | 烟台显华科技集团股份有限公司 | Liquid crystal compound with negative dielectric anisotropy, liquid crystal composition and liquid crystal display device |
| WO2022073400A1 (en) * | 2020-10-09 | 2022-04-14 | 烟台显华化工科技有限公司 | Liquid crystal compound having negative dielectric anisotropy, liquid crystal composition, and liquid crystal display device |
| TWI779852B (en) * | 2020-10-09 | 2022-10-01 | 大陸商煙台顯華科技集團股份有限公司 | Liquid crystal compound with negative dielectric anisotropy, liquid crystal composition and liquid crystal display device |
| CN114574219A (en) * | 2020-12-01 | 2022-06-03 | 江苏和成显示科技有限公司 | Liquid crystal composition and liquid crystal display device thereof |
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| CN115216307B (en) * | 2021-04-15 | 2024-02-20 | 河北迈尔斯通电子材料有限公司 | Low-threshold low-power consumption low-viscosity liquid crystal composition |
| CN114369466A (en) * | 2021-11-11 | 2022-04-19 | 烟台显华科技集团股份有限公司 | Negative dielectric anisotropy liquid crystal composition with high gradient and application thereof |
| CN114369466B (en) * | 2021-11-11 | 2024-04-05 | 烟台显华科技集团股份有限公司 | Negative dielectric anisotropy liquid crystal composition with high gradient and application thereof |
| CN116814277A (en) * | 2023-08-29 | 2023-09-29 | 烟台显华科技集团股份有限公司 | High-gradient high-brightness negative dielectric anisotropy liquid crystal composition and application thereof |
| CN116814277B (en) * | 2023-08-29 | 2023-12-26 | 烟台显华科技集团股份有限公司 | High-gradient high-brightness negative dielectric anisotropy liquid crystal composition and application thereof |
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