CN113355106A - Liquid crystal composition and liquid crystal display device - Google Patents
Liquid crystal composition and liquid crystal display device Download PDFInfo
- Publication number
- CN113355106A CN113355106A CN202110729118.8A CN202110729118A CN113355106A CN 113355106 A CN113355106 A CN 113355106A CN 202110729118 A CN202110729118 A CN 202110729118A CN 113355106 A CN113355106 A CN 113355106A
- Authority
- CN
- China
- Prior art keywords
- liquid crystal
- crystal composition
- formula
- composition
- compound
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 187
- 239000000203 mixture Substances 0.000 title claims abstract description 182
- 150000001875 compounds Chemical class 0.000 claims abstract description 85
- 125000004432 carbon atom Chemical group C* 0.000 claims description 13
- 125000000217 alkyl group Chemical group 0.000 claims description 8
- 239000011159 matrix material Substances 0.000 claims description 8
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N diphenyl Chemical compound C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 claims description 6
- 125000003545 alkoxy group Chemical group 0.000 claims description 4
- YJTKZCDBKVTVBY-UHFFFAOYSA-N 1,3-Diphenylbenzene Chemical group C1=CC=CC=C1C1=CC=CC(C=2C=CC=CC=2)=C1 YJTKZCDBKVTVBY-UHFFFAOYSA-N 0.000 claims description 3
- 235000010290 biphenyl Nutrition 0.000 claims description 3
- 239000004305 biphenyl Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 3
- 230000000875 corresponding effect Effects 0.000 description 38
- 238000009472 formulation Methods 0.000 description 36
- 239000013078 crystal Substances 0.000 description 22
- 238000012360 testing method Methods 0.000 description 19
- 238000001556 precipitation Methods 0.000 description 15
- 230000000052 comparative effect Effects 0.000 description 6
- 239000000178 monomer Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 230000032683 aging Effects 0.000 description 3
- 125000003342 alkenyl group Chemical group 0.000 description 3
- 239000002019 doping agent Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 230000001678 irradiating effect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- -1 vinyl compound Chemical class 0.000 description 3
- 239000003963 antioxidant agent Substances 0.000 description 2
- 230000003078 antioxidant effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000004611 light stabiliser Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- RGOVYLWUIBMPGK-UHFFFAOYSA-N nonivamide Chemical compound CCCCCCCCC(=O)NCC1=CC=C(O)C(OC)=C1 RGOVYLWUIBMPGK-UHFFFAOYSA-N 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 125000004973 1-butenyl group Chemical group C(=CCC)* 0.000 description 1
- 125000006039 1-hexenyl group Chemical group 0.000 description 1
- 125000006023 1-pentenyl group Chemical group 0.000 description 1
- 125000006017 1-propenyl group Chemical group 0.000 description 1
- 125000004974 2-butenyl group Chemical group C(C=CC)* 0.000 description 1
- 125000006040 2-hexenyl group Chemical group 0.000 description 1
- 125000006024 2-pentenyl group Chemical group 0.000 description 1
- 125000004975 3-butenyl group Chemical group C(CC=C)* 0.000 description 1
- 125000006041 3-hexenyl group Chemical group 0.000 description 1
- 101001053395 Arabidopsis thaliana Acid beta-fructofuranosidase 4, vacuolar Proteins 0.000 description 1
- 230000006750 UV protection Effects 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 125000005647 linker group Chemical group 0.000 description 1
- 238000003760 magnetic stirring Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007142 ring opening reaction Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
- C09K19/06—Non-steroidal liquid crystal compounds
- C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
- C09K19/30—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing saturated or unsaturated non-aromatic rings, e.g. cyclohexane rings
- C09K19/3001—Cyclohexane rings
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
- C09K19/42—Mixtures of liquid crystal compounds covered by two or more of the preceding groups C09K19/06 - C09K19/40
- C09K19/44—Mixtures of liquid crystal compounds covered by two or more of the preceding groups C09K19/06 - C09K19/40 containing compounds with benzene rings directly linked
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—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
- 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
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
Landscapes
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal Substances (AREA)
Abstract
The 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 a liquid crystal display containing the same. The invention discloses a liquid crystal composition which is characterized by comprising a compound shown as a formula I, a compound shown as a formula II, a compound shown as a formula III, compounds shown as formulas IV-1, IV-2 and IV-3, a compound shown as a formula V and a compound shown as a formula VI. The liquid crystal composition is mainly applied to the technical field of public information display.
Description
Technical Field
The invention relates to the technical field of liquid crystal display. And more particularly, to a liquid crystal composition and a liquid crystal display device.
Background
Liquid crystal display elements are classified into the following modes according to display modes: twisted Nematic (TN) mode, Super Twisted Nematic (STN) mode, in-plane switching mode (IPS), fringe field control mode (FFS), Vertical Alignment (VA) mode. In any display mode, it is required that the liquid crystal composition has an appropriate optical anisotropy Δ n, an appropriate dielectric anisotropy Δ ∈ and a low rotational viscosity γ1Good stability to light and heat and good low temperature storage properties.
In general, liquid crystal display devices are mainly used in display terminals such as mobile phones, computers, and televisions. With the rapid development of science and technology, the display industry is also continuously advancing, and the application and the demand of the liquid crystal display element are more and more. Public Information Display (PID) is a type of application Display which is developed rapidly in recent years, and is mainly applied to scenes such as catering chains, large business supermarkets, fashion markets, movie theaters, conference exhibition halls, outdoor signs and the like, and fields such as schools, hotels, retail, medical treatment, government and enterprises. The display has wide application range and wide application environment, so the display has the characteristics of high brightness, high contrast, super-long service life, wide use temperature (-40-120 ℃) and the like. For the PID liquid crystal material used for the display device, there is a demand for a liquid crystal material having (i) a high-definition bright point: the wider the operating temperature range of the panel; high elastic coefficient K: the higher the contrast of the panel; high reliability: high charge retention rate, high specific resistance and anti-aging performance to UV light or backlight; excellent storage characteristics: it is required to exhibit a stable nematic phase in a low temperature-40 ℃ environment and a high temperature environment; appropriate pretilt angle (PSVA mode): too large pretilt angle affects the process throughput, while too small pretilt angle also results in severe dark state light leakage. In practical studies, it has been found that it is very difficult to combine a liquid crystal composition having a large elastic constant, a high clearing point, excellent low-temperature storage characteristics and high reliability. Therefore, it is a very difficult problem to develop a liquid crystal composition having a large elastic constant, a high clearing point, excellent low-temperature storage characteristics and high reliability.
Disclosure of Invention
The technical scheme provided by the invention has good low-temperature intersolubility, good reliability, larger elastic constant, higher clearing point and proper pretilt angle, is mainly applied to the field of public display (PID), is particularly suitable for a low-temperature environment of-40 ℃, and is suitable for the technical field of large-screen display with narrow frames.
In order to realize the beneficial technical effects, the invention provides a liquid crystal composition which comprises at least 3 compounds shown as a formula I, at least 2 compounds shown as a formula II and at least 2 compounds shown as a formula III, and also comprises compounds shown as formulas IV-1, IV-2 and IV-3, at least one compound shown as a formula V and at least one compound shown as a formula VI, wherein the mass percentage of the compound shown as the formula IV-1 in the liquid crystal composition is less than 15 percent, and the sum of the mass percentages of the compounds shown as the formula IV-2 and the compound shown as the formula IV-3 in the liquid crystal composition is less than 9 percent,
wherein,
R1、R2、R3、R4、R5、R6、R7、R8、R9each independently represents an alkyl group having 1 to 10 carbon atoms;
R10represents an alkoxy group having 1 to 10 carbon atoms;
Z1represents a single bond or-COO-;
A second object of the present invention is to provide a liquid crystal display device, which is mainly applied to the field of public display technology.
A third object of the present invention is to provide a liquid crystal display, which is mainly applied to the technical field of public display.
Effects of the invention
The liquid crystal composition provided by the technical scheme of the invention has good low-temperature intersolubility, good reliability, larger elastic constant, higher clearing point and capability of forming a proper pretilt angle, saves the manufacturing process and avoids dark state light leakage, is mainly applied to the public display field (PID), is especially suitable for outdoor display in severe environment, is suitable for the technical field of large-screen display with narrow frames, and has good contrast.
Detailed Description
The invention provides a liquid crystal composition, which comprises at least 3 compounds shown as a formula I, at least 2 compounds shown as a formula II and at least 2 compounds shown as a formula III, and also comprises compounds shown as formulas IV-1, IV-2 and IV-3, at least one compound shown as a formula V and at least one compound shown as a formula VI, wherein the mass percentage of the compound shown as the formula IV-1 in the liquid crystal composition is less than 15 percent, and the sum of the mass percentages of the compounds shown as the formulas IV-2 and IV-3 in the liquid crystal composition is less than 9 percent,
wherein,
R1、R2、R3、R4、R5、R6、R7、R8、R9each independently represents an alkyl group having 1 to 10 carbon atoms;
R10represents an alkoxy group having 1 to 10 carbon atoms;
Z1represents a single bond or-COO-;
In the liquid crystal composition of the present invention, the mass percentage of the compound represented by formula iii in the liquid crystal composition is preferably 1 to 8%.
In the liquid crystal composition, the compound shown in the formula VI in the liquid crystal composition preferably accounts for 7-12% by mass.
The liquid crystal composition of the present invention is preferably such that the compound represented by the above formula I is preferably selected from the group consisting of the compounds represented by the following formulae I-1 to I-6,
in the liquid crystal composition of the present invention, preferably, the compound represented by the formula I is 20 to 25% by mass, and the content of each of the compounds represented by the formulae I-1 to I-6 in the liquid crystal composition is less than 10% by mass.
The liquid crystal composition of the present invention preferably contains the compounds represented by formula I-1, formula I-2, formula I-4 and formula I-6.
The liquid crystal composition of the present invention is preferably such that the compound represented by the above formula II is selected from the group consisting of compounds represented by the formulae II-1 to II-5,
in the liquid crystal composition, the mass percentage of any one of the compounds shown in formulas II-1 to II-5 in the liquid crystal composition is less than 9 percent. Preferably, the liquid crystal composition comprises the compounds shown in the formulas II-1 and II-2.
The liquid crystal composition of the present invention is preferably such that the compound represented by the above formula III is selected from the group consisting of compounds represented by the following formulae III-1 to III-6,
the liquid crystal composition of the invention contains less than 7% of any of the compounds shown in formulas III-1 to III-6 by mass percent. Preferably, the liquid crystal composition comprises the compounds shown in the formulas III-1 and III-2.
In the liquid crystal composition of the present invention, preferably, the compound represented by the formula V is selected from the group consisting of compounds represented by the following formulae V-1 to V-10,
the liquid crystal composition of the invention preferably contains the compound shown in the formula V-1, and the mass percentage of the compound shown in the formula V-1 in the liquid crystal composition is 2-5%.
In the liquid crystal composition of the present invention, the compound represented by the formula VI is preferably selected from the group consisting of compounds represented by the following formulae VI-1 to VI-4,
the liquid crystal composition preferably contains a compound shown as a formula VI-2, and the mass percentage of the compound shown as the formula VI-2 in the liquid crystal composition is 8.5-11.5%. In the technical scheme of the invention, 8.5-11.5% of the compound shown in the formula VI-2 is added, so that the low temperature of a liquid crystal system consisting of the liquid crystal composition is promoted.
The liquid crystal composition of the present invention preferably further comprises one or more compounds represented by formula VII,
wherein,
R11、R12each independently represents an alkyl group having 1 to 10 carbon atoms.
The liquid crystal composition of the present invention is preferably such that the aforementioned compound represented by the formula VII is selected from the group consisting of the compounds represented by the following formulae VII-1 to VII-3,
the liquid crystal composition of the invention preferably comprises at least two compounds selected from the compounds shown in formulas VII-1 to VII-3, and the mass percentage of the compounds selected from the compounds shown in formulas VII-1 to VII-3 in the liquid crystal composition is 10-13%.
The liquid crystal composition of the present invention preferably further comprises one or more compounds represented by formula VIII,
wherein R is13、R14Each independently represents an alkyl group having 1 to 10 carbon atoms.
In the liquid crystal composition of the present invention, the content of the compound represented by the formula viii is preferably 4 to 6.5% by mass.
The liquid crystal composition of the present invention preferably further comprises a compound represented by formula IX,
in the liquid crystal composition of the present invention, the compound represented by the formula IX is preferably contained in an amount of 6 to 8% by mass.
The liquid crystal composition of the present invention preferably does not contain a biphenyl or terphenyl liquid crystal compound.
In the liquid crystal composition of the present invention, the biphenyl or terphenyl liquid crystal compound is preferably selected from the group consisting of compounds represented by the following formulae B-1 to B-2,
wherein,
ra and Rb each independently represent an alkyl group having 1 to 10 carbon atoms, an alkoxy group having 1 to 10 carbon atoms or an alkenyl group having 2 to 10 carbon atoms; x1、X2、X3、X4Each independently represents H or F, and X1、X2、X3、X4At least one of them represents F.
The liquid crystal composition of the present invention preferably further comprises one or more polymerizable compounds.
The liquid crystal composition of the present invention is preferably such that the aforementioned polymerizable compound is selected from the group consisting of compounds represented by the following formulae X-1 and X-2,
in the liquid crystal composition of the present invention, the addition amount of the polymerizable compound is preferably based on 100% by mass of the liquid crystal composition, and the addition amount is 0.25-0.35% by mass of the liquid crystal composition.
The liquid crystal composition of the present invention preferably does not contain an olefinic compound.
In the liquid crystal composition of the present invention, the vinyl compound preferably contains an alkenyl group and a cycloolefine.
Examples of the alkenyl group include a vinyl group, a 1-propenyl group, a 1-butenyl group, a 2-butenyl group, a 3-butenyl group, a 1-pentenyl group, a 2-pentenyl group, a 3-pentenyl group, a 4-pentenyl group, a 1-hexenyl group, a 2-hexenyl group, and a 3-hexenyl group.
Examples of the above-mentioned ring-opening alkene include,
and the like.
Preferably, dopants with various functions can also be added into the liquid crystal compound; in the liquid crystal composition, the content of the dopant is preferably 0.01-1% by mass.
Preferably, the dopant is mainly an antioxidant, a light stabilizer, or the like.
Preferably, the antioxidant is selected from one or more of the compounds represented by the following structural formula:
wherein S represents an integer of 1 to 10.
Preferably, the light stabilizer is
Wherein,
s represents an integer of 1 to 10.
[ liquid Crystal display element or liquid Crystal display ]
The invention also relates to a liquid crystal display element or a liquid crystal display comprising any one of the liquid crystal compositions; the display element or display is an active matrix display element or display or a passive matrix display element or display.
The liquid crystal display element or liquid crystal display of the present invention is preferably an active matrix addressed liquid crystal display element or liquid crystal display.
Specific examples of the active matrix display element or display include IPS-TFT, FFS-TFT, VA-TFT liquid crystal display elements, and other TFT displays, and PSVA-TFT liquid crystal display elements and liquid crystal displays are particularly suitable.
The liquid crystal display element or the liquid crystal display of the invention comprises the liquid crystal composition disclosed by the invention. The liquid crystal display element or the liquid crystal display is mainly applied to the field of public display (PID), is particularly suitable for the low-temperature environment of minus 40 ℃, is suitable for the technical field of large-screen display with narrow frames, and has good contrast.
Examples
In order to more clearly illustrate the invention, the invention is further described below in connection with preferred embodiments. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.
In the invention, the preparation method is a conventional method if no special description is provided, the used raw materials can be obtained from a public commercial way if no special description is provided, the percentages refer to mass percentage, the temperature is centigrade (DEG C), and the specific meanings and test conditions of other symbols are as follows:
cp represents a liquid crystal clearing point (DEG C), and is measured by a DSC quantitative method;
Δ n represents optical anisotropy, and Δ n ═ ne-noWherein n isoRefractive index of ordinary light, neThe refractive index of the extraordinary ray is measured under the conditions of 25 +/-2 ℃ and 589nm, and the Abbe refractometer is used for testing;
Δ ε represents dielectric anisotropy, and Δ ε∥-ε⊥Wherein, epsilon∥Is a dielectric constant parallel to the molecular axis,. epsilon⊥Dielectric constant perpendicular to the molecular axis, at 25 + -0.5 deg.C, 20 μm antiparallel box, INSTEC: ALCT-IR1 test;
K11is the splay elastic constant, K33For the flexural elastic constant, the test conditions were: 25 ℃ and INSTEC, ALCT-IR1 and 20 micron antiparallel case;
VHR represents the voltage holding ratio (%), and the test conditions are 60 + -1 deg.C, voltage + -5V, pulse width 10ms, and voltage holding time 166.7 ms. The testing equipment is a TOYO Model6254 liquid crystal performance comprehensive tester;
low-temperature observation conditions: pouring 1g of liquid crystal into a 5ml clean glass vial, sealing the vial, placing the vial into a low-temperature refrigerator at minus 40 ℃, observing the vial for 500 hours, and recording whether crystals are separated out from the liquid crystal once per hour.
The preparation method of the liquid crystal composition comprises the following steps: weighing each liquid crystal monomer according to a certain proportion, putting the liquid crystal monomers into a stainless steel beaker, putting the stainless steel beaker filled with each liquid crystal monomer on a magnetic stirring instrument for heating and melting, adding a magnetic rotor into the stainless steel beaker after most of the liquid crystal monomers in the stainless steel beaker are melted, uniformly stirring the mixture, and cooling to room temperature to obtain the liquid crystal composition.
The liquid crystal monomer structure of the embodiment of the invention is represented by codes, and the code representation methods of the liquid crystal ring structure, the end group and the connecting group are shown in the following tables 1 and 2.
Table 1 corresponding code of the ring structure
TABLE 2 corresponding codes for end groups and linking groups
Examples are:
composition examples
Composition C1
The formulation and corresponding properties of the liquid crystal compositions are shown in table 3 below.
TABLE 3C 1 formulation of liquid crystal compositions and corresponding Properties
Composition C2
The formulation and corresponding properties of the liquid crystal compositions are shown in table 4 below.
TABLE 4C 2 formulation of liquid crystal compositions and corresponding Properties
Composition C3
The formulation and corresponding properties of the liquid crystal compositions are shown in table 5 below.
TABLE 5C 3 formulation of liquid crystal compositions and corresponding Properties
Composition C4
The formulation and corresponding properties of the liquid crystal compositions are shown in table 6 below.
TABLE 6C 4 formulation of liquid crystal compositions and corresponding Properties
Composition C5
The formulation and corresponding properties of the liquid crystal compositions are shown in table 7 below.
TABLE 7 formulation of C5 liquid crystal composition and corresponding Properties
Composition C6
The formulation and corresponding properties of the liquid crystal compositions are shown in Table 8 below.
TABLE 8C 6 formulation of liquid crystal compositions and corresponding Properties
Composition D1
The formulation and corresponding properties of the liquid crystal compositions are shown in table 9 below.
TABLE 9D 1 formulation of liquid crystal compositions and corresponding Properties
Composition D2
The formulation and corresponding properties of the liquid crystal composition are shown in table 10 below.
TABLE 10D 2 formulation of liquid crystal compositions and corresponding Properties
Composition D3
The formulation and corresponding properties of the liquid crystal compositions are shown in Table 11 below.
TABLE 11D 3 formulation of liquid crystal compositions and corresponding Properties
Composition D4
The formulation and corresponding properties of the liquid crystal compositions are shown in table 12 below.
TABLE 12D 4 formulation of liquid crystal compositions and corresponding Properties
Composition D5
The formulation and corresponding properties of the liquid crystal compositions are shown in Table 13 below.
TABLE 13D 5 formulation of liquid crystal compositions and corresponding Properties
Composition D6
The formulation and corresponding properties of the liquid crystal compositions are shown in Table 14 below.
TABLE 14D 6 formulation of liquid crystal compositions and corresponding Properties
Composition D7
The formulation and corresponding properties of the liquid crystal compositions are shown in Table 15 below.
TABLE 15D 7 formulation of liquid crystal compositions and corresponding Properties
Composition D8
The formulation of the liquid crystal composition and the corresponding properties are shown in Table 16 below.
TABLE 16D 8 formulation of liquid crystal compositions and corresponding Properties
Composition D9
The formulation and corresponding properties of the liquid crystal compositions are shown in Table 17 below.
TABLE 17D 9 formulation of liquid crystal compositions and corresponding Properties
Composition D10
The formulation and corresponding properties of the liquid crystal compositions are shown in Table 18 below.
TABLE 18D 10 formulation of liquid crystal compositions and corresponding Properties
Composition D11
The formulation and corresponding properties of the liquid crystal compositions are shown in Table 19 below.
TABLE 19D 11 formulation of liquid crystal compositions and corresponding Properties
Composition D12
The formulation and corresponding properties of the liquid crystal compositions are shown in Table 20 below.
TABLE 20D 12 formulation of liquid crystal compositions and corresponding Properties
Tables 21C 1-C6 and D1-D12 Low temperature conditions of liquid crystal compositions
| Standing at-40 deg.C for 500hr | |
| C1 | No crystal precipitation |
| C2 | No crystal precipitation |
| C3 | No crystal precipitation |
| C4 | No crystal precipitation |
| C5 | No crystal precipitation |
| C6 | No crystal precipitation |
| D1 | Crystals precipitated within 96 hours |
| D2 | Crystal formation in 96 hoursPrecipitation of the body |
| D3 | Crystals precipitated within 24 hours |
| D4 | Crystal precipitation in 72 hours |
| D5 | Crystal precipitation in 72 hours |
| D6 | Crystals precipitated within 24 hours |
| D7 | Crystals precipitated within 24 hours |
| D8 | No crystal precipitation |
| D9 | No crystal precipitation |
| D10 | No crystal precipitation |
| D11 | No crystal precipitation |
| D12 | No crystal precipitation |
The investigation of whether the liquid crystal composition is crystallized after being placed at a low temperature for a period of time is one of the technical indexes which are inevitably investigated in the liquid crystal development process, and is an important factor influencing whether the liquid crystal composition can be normally displayed under an extreme temperature condition when being applied to a liquid crystal display element or a liquid crystal display. The experiment was performed by pouring 1g of the liquid crystal composition into a 5ml clean glass bottle and storing it in a closed state in a low-temperature refrigerator at-40 ℃ for 500 hours, and observing and recording whether crystals were precipitated every hour. The longer the time for standing and storing under low temperature conditions, the better the low temperature stability of the liquid crystal composition. As can be seen from the data in Table 21, the samples C1 to C6 had no crystal precipitation and had good low temperature stability when they were left at-40 ℃ for 500 hours; comparative examples D1 to D7 all exhibited crystal precipitation and poor low temperature stability.
In Table 22, the liquid crystal compositions C1-C6 and D1-D12 were mixed uniformly with 0.3% of X-1 compound, and then tested for VHR and pretilt angle, which are numbered C1-C6 and D1-D12, respectively.
Tables 22C 1-C6 and D1-D12 liquid crystal compositions have VHR performance and pretilt angles
VHR (Voltage Holding ratio) represents the voltage Holding ratio (%) of the liquid crystal molecules of the liquid crystal composition under the condition of applying an external voltage, and the experiment is carried out by pouring the liquid crystals of the examples and the comparative examples into a test cell respectively under the test conditions of 60 + -1 deg.C, voltage + -5V, pulse width 10ms, and voltage Holding time 166.7ms (the voltage Holding time and the frequency are reciprocal, and the conversion frequency is 6 Hz); the testing equipment is a TOYO Model6254 liquid crystal performance comprehensive tester; the initial VHR value is data obtained by testing a test cell without any treatment, the VHR after-UV value is a VHR value obtained by testing a test cell filled with liquid crystal after irradiating 5000mj under 365nm UV light, and the VHR after-aging value is a VHR value obtained by testing a test cell filled with liquid crystal after being placed on a backlight of 20000nit at an ambient temperature of 60 ℃ for 500 hr. The smaller difference in VHR before and after UV (or before and after backlight aging) of the liquid crystal composition indicates the better UV resistance (service life) of the liquid crystal. Therefore, the difference between the VHR data before and after the test of each example and comparative example was compared to judge the reliability of the liquid crystal composition. According to the data in Table 22, the VHRs of examples C1 through C6 dropped less after UV or aging, indicating that they had better life; the VHRs of comparative examples D8 to D12 exhibited a more pronounced drop in life after UV or aging. It can be seen from the experimental data in tables 21 and 22 that the examples C1 to C6 according to the present invention can achieve better low temperature stability and better service life at the same time compared to the comparative examples, and have significant technical effects.
The pretilt angle is an important liquid crystal display design parameter for PSVA applications. The experiment was carried out by pouring the liquid crystals of examples and comparative examples into a test cell, irradiating the liquid crystals for 70 seconds under UV1 (dominant wavelength of 313nm and 365nm), and then irradiating the liquid crystals for 90 minutes under UV2 (dominant wavelength of 365nm), followed by subjecting the test cell to an optical pretilt angle test. The pretilt angle should neither be too large nor too small. The pretilt angle is too large, which affects the process throughput, and too small, which results in severe dark state light leakage, so it is very important to control the pretilt angle of the liquid crystal composition.
In summary, by comparing the above experimental data, the liquid crystal composition of the present invention has better low temperature stability, so that the liquid crystal composition can be better applied to outdoor displays with more strict requirements on external environmental conditions (especially outdoor displays with harsh environments), and meanwhile, the liquid crystal composition has good reliability and a proper pretilt angle, and can save the manufacturing process and avoid dark state light leakage. Therefore, the liquid crystal composition provided by the technical scheme of the invention has good low-temperature intersolubility, good reliability, larger elastic constant, higher clearing point and capability of forming a proper pretilt angle, saves the manufacturing process and avoids dark-state light leakage, is mainly applied to the public display field (PID), is especially suitable for outdoor display in severe environment, is suitable for the technical field of large-screen display with narrow frames, and has good contrast.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations or modifications may be made on the basis of the above description, and all embodiments may not be exhaustive, and all obvious variations or modifications may be included within the scope of the present invention.
Claims (10)
1. A liquid crystal composition is characterized by comprising at least 3 compounds shown as a formula I, at least 2 compounds shown as a formula II and at least 2 compounds shown as a formula III, and also comprising compounds shown as formulas IV-1, IV-2 and IV-3, at least one compound shown as a formula V and at least one compound shown as a formula VI, wherein the mass percentage of the compound shown as the formula IV-1 in the liquid crystal composition is less than 15 percent, and the sum of the mass percentages of the compounds shown as the formula IV-2 and the compound shown as the formula IV-3 in the liquid crystal composition is less than 9 percent,
wherein,
R1、R2、R3、R4、R5、R6、R7、R8、R9each independently represents an alkyl group having 1 to 10 carbon atoms;
R10represents an alkoxy group having 1 to 10 carbon atoms;
Z1represents a single bond or-COO-;
2. The liquid crystal composition according to claim 1, wherein the compound represented by the formula III is contained in the liquid crystal composition in an amount of 1 to 8% by mass.
3. The liquid crystal composition as claimed in claim 1, wherein the compound represented by the formula VI in the liquid crystal composition is contained in an amount of 7 to 12% by mass.
4. The liquid crystal composition of any of claims 1 to 3, further comprising one or more compounds of formula VII,
wherein,
R11、R12each independently represents an alkyl group having 1 to 10 carbon atoms.
5. The liquid crystal composition of claim 4, further comprising one or more compounds of formula VIII,
wherein R is13、R14Each independently represents an alkyl group having 1 to 10 carbon atoms.
6. The liquid crystal composition of claim 5, further comprising a compound of formula IX,
7. the liquid crystal composition of claim 6, wherein the liquid crystal composition does not comprise a biphenyl or terphenyl liquid crystal compound.
8. The liquid crystal composition of claim 7, further comprising one or more polymerizable compounds.
9. A liquid crystal display element comprising the liquid crystal composition according to any one of claims 1 to 8, wherein the liquid crystal display element is an active matrix display element or a passive matrix display element.
10. A liquid crystal display comprising the liquid crystal composition according to any one of claims 1 to 8, wherein the liquid crystal display is an active matrix display or a passive matrix display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110729118.8A CN113355106A (en) | 2021-06-29 | 2021-06-29 | Liquid crystal composition and liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110729118.8A CN113355106A (en) | 2021-06-29 | 2021-06-29 | Liquid crystal composition and liquid crystal display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113355106A true CN113355106A (en) | 2021-09-07 |
Family
ID=77537218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110729118.8A Pending CN113355106A (en) | 2021-06-29 | 2021-06-29 | Liquid crystal composition and liquid crystal display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113355106A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110295046A (en) * | 2018-03-23 | 2019-10-01 | 石家庄诚志永华显示材料有限公司 | Liquid-crystal composition |
| US20200239777A1 (en) * | 2019-01-29 | 2020-07-30 | Shijiazhuang Chengzhi Yonghua Display Material Co., Ltd. | Liquid crystal composition, liquid crystal display element and liquid crystal display |
| CN112940739A (en) * | 2019-12-30 | 2021-06-11 | 石家庄诚志永华显示材料有限公司 | Liquid crystal composition, liquid crystal display element and liquid crystal display |
| CN113004910A (en) * | 2020-12-28 | 2021-06-22 | 石家庄诚志永华显示材料有限公司 | High-penetration-rate quick-response liquid crystal composition and application thereof |
| CN113004911A (en) * | 2020-12-28 | 2021-06-22 | 石家庄诚志永华显示材料有限公司 | Liquid crystal composition for large-size liquid crystal display element or liquid crystal display |
-
2021
- 2021-06-29 CN CN202110729118.8A patent/CN113355106A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110295046A (en) * | 2018-03-23 | 2019-10-01 | 石家庄诚志永华显示材料有限公司 | Liquid-crystal composition |
| US20200239777A1 (en) * | 2019-01-29 | 2020-07-30 | Shijiazhuang Chengzhi Yonghua Display Material Co., Ltd. | Liquid crystal composition, liquid crystal display element and liquid crystal display |
| CN112940739A (en) * | 2019-12-30 | 2021-06-11 | 石家庄诚志永华显示材料有限公司 | Liquid crystal composition, liquid crystal display element and liquid crystal display |
| CN113004910A (en) * | 2020-12-28 | 2021-06-22 | 石家庄诚志永华显示材料有限公司 | High-penetration-rate quick-response liquid crystal composition and application thereof |
| CN113004911A (en) * | 2020-12-28 | 2021-06-22 | 石家庄诚志永华显示材料有限公司 | Liquid crystal composition for large-size liquid crystal display element or liquid crystal display |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109880637B (en) | Liquid crystal composition, liquid crystal display element and liquid crystal display | |
| CN109837097B (en) | Liquid crystal composition, liquid crystal display element and liquid crystal display | |
| CN109988583B (en) | Liquid crystal composition and liquid crystal display device | |
| CN109880638B (en) | Liquid crystal composition, liquid crystal display element and liquid crystal display | |
| CN116254120A (en) | Liquid crystal composition with good frequency dependence and liquid crystal display element | |
| CN113004910B (en) | High-penetration-rate quick-response liquid crystal composition and application thereof | |
| CN113355106A (en) | Liquid crystal composition and liquid crystal display device | |
| CN107286947B (en) | Polymerizable liquid crystal composition and liquid crystal display device | |
| CN112920809B (en) | Liquid crystal composition, liquid crystal display element and liquid crystal display | |
| CN110373211B (en) | Liquid crystal composition containing cyclopentanothiophene liquid crystal molecules | |
| JP3864435B2 (en) | Nematic liquid crystal composition and liquid crystal display device using the same | |
| CN111334312A (en) | Liquid crystal composition, liquid crystal display element and liquid crystal display | |
| CN111518570A (en) | Liquid crystal composition, liquid crystal display element and liquid crystal display | |
| CN111363560A (en) | Liquid crystal composition, liquid crystal display element and liquid crystal display | |
| CN112961682A (en) | Liquid crystal composition, liquid crystal display element and liquid crystal display | |
| CN111454734A (en) | Liquid crystal composition, liquid crystal display element and liquid crystal display | |
| CN113046095A (en) | Liquid crystal composition, liquid crystal display element or liquid crystal display | |
| CN112391172B (en) | Liquid crystal composition and application thereof | |
| CN112940744B (en) | Liquid crystal composition, liquid crystal display element and liquid crystal display | |
| CN113122281B (en) | Liquid crystal composition, liquid crystal display element and liquid crystal display | |
| CN112940753B (en) | Liquid crystal composition, liquid crystal display element or liquid crystal display | |
| CN112940748A (en) | Liquid crystal composition, liquid crystal display element and liquid crystal display | |
| CN112940738A (en) | Liquid crystal composition, liquid crystal display element and liquid crystal display | |
| CN118308118A (en) | High-reliability liquid crystal composition and application thereof | |
| JP3630179B2 (en) | Nematic liquid crystal composition and liquid crystal display device using the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210907 |
|
| RJ01 | Rejection of invention patent application after publication |