CN109837098A - Liquid-crystal composition, liquid crystal display element, liquid crystal display - Google Patents
Liquid-crystal composition, liquid crystal display element, liquid crystal display Download PDFInfo
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- CN109837098A CN109837098A CN201910252426.9A CN201910252426A CN109837098A CN 109837098 A CN109837098 A CN 109837098A CN 201910252426 A CN201910252426 A CN 201910252426A CN 109837098 A CN109837098 A CN 109837098A
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 174
- 239000000203 mixture Substances 0.000 title claims abstract description 139
- 150000001875 compounds Chemical class 0.000 claims abstract description 77
- 229910052799 carbon Inorganic materials 0.000 claims description 71
- 150000001721 carbon Chemical group 0.000 claims description 68
- -1 cyclopropylidene Chemical group 0.000 claims description 30
- 125000003342 alkenyl group Chemical group 0.000 claims description 24
- 125000000217 alkyl group Chemical group 0.000 claims description 21
- 125000003302 alkenyloxy group Chemical group 0.000 claims description 20
- 125000003545 alkoxy group Chemical group 0.000 claims description 13
- 239000011159 matrix material Substances 0.000 claims description 11
- 229910052739 hydrogen Inorganic materials 0.000 claims description 10
- 125000001118 alkylidene group Chemical group 0.000 claims description 9
- 229910052731 fluorine Inorganic materials 0.000 claims description 8
- 125000004979 cyclopentylene group Chemical group 0.000 claims description 7
- 238000006467 substitution reaction Methods 0.000 claims description 7
- 150000001336 alkenes Chemical class 0.000 claims description 4
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 3
- 229910052736 halogen Inorganic materials 0.000 claims description 3
- 150000002367 halogens Chemical class 0.000 claims description 3
- 239000001257 hydrogen Substances 0.000 claims description 3
- 125000000876 trifluoromethoxy group Chemical group FC(F)(F)O* 0.000 claims description 3
- 125000004786 difluoromethoxy group Chemical group [H]C(F)(F)O* 0.000 claims description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims 2
- 229910052760 oxygen Inorganic materials 0.000 claims 2
- 239000001301 oxygen Substances 0.000 claims 2
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 claims 1
- 125000001820 oxy group Chemical group [*:1]O[*:2] 0.000 claims 1
- 230000014759 maintenance of location Effects 0.000 abstract description 16
- 230000007547 defect Effects 0.000 abstract description 6
- 230000003287 optical effect Effects 0.000 abstract description 6
- 238000004090 dissolution Methods 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 description 20
- 230000000052 comparative effect Effects 0.000 description 16
- 239000000654 additive Substances 0.000 description 8
- 230000000996 additive effect Effects 0.000 description 8
- 125000001995 cyclobutyl group Chemical group [H]C1([H])C([H])([H])C([H])(*)C1([H])[H] 0.000 description 7
- 239000000178 monomer Substances 0.000 description 5
- 125000001559 cyclopropyl group Chemical group [H]C1([H])C([H])([H])C1([H])* 0.000 description 4
- 239000002019 doping agent Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000006096 absorbing agent Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 125000000740 n-pentyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- UWCWUCKPEYNDNV-LBPRGKRZSA-N 2,6-dimethyl-n-[[(2s)-pyrrolidin-2-yl]methyl]aniline Chemical compound CC1=CC=CC(C)=C1NC[C@H]1NCCC1 UWCWUCKPEYNDNV-LBPRGKRZSA-N 0.000 description 1
- 101001053401 Arabidopsis thaliana Acid beta-fructofuranosidase 3, vacuolar Proteins 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 125000005647 linker group Chemical group 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 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
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- Liquid Crystal Substances (AREA)
Abstract
The present invention relates to liquid-crystal compositions, and liquid crystal display element, liquid crystal display comprising the liquid-crystal composition belong to field of liquid crystal display.Liquid-crystal composition of the invention, comprising one or more I compounds represented of formula and, one or more II compounds represented of formula, the liquid-crystal composition can improve image retention defect, and there is good uvioresistant, high-temperature resistance, moderate optical anisotropy Δ n, lower viscosity, fast response time and good dissolution in low temperature.
Description
Technical field
The invention belongs to technical field of liquid crystal display, more particularly, to liquid-crystal composition, and include the liquid crystal group
Close the liquid crystal display element or liquid crystal display of object.
Background technique
With the development of display technology, the planes such as liquid crystal display (Liquid Crystal Display, LCD) display dress
It sets because having many advantages, such as that high image quality, power saving, fuselage is thin and has a wide range of application, and is widely used in mobile phone, TV, a number
The various consumer electrical products such as word assistant, digital camera, laptop, desktop computer, become the master in display device
Stream.The requirement that people show liquid crystal flat-panel is higher and higher.Therefore to the spy of liquid crystal material quality used in liquid crystal flat panel display
Higher requirements are also raised for property.
In use, liquid-crystal composition can constantly be influenced by light radiation and heat radiation liquid crystal display, together
When in liquid crystal display or liquid-crystal composition manufacturing process, liquid-crystal composition is also inevitably contacted by light with heat,
This light with thermally contact, the especially light and high temperature of ultraviolet band will cause liquid crystal molecule and become negatively affected in terms of impurity,
To influence the variation of liquid crystal molecule anchoring ability, and then influence the display effect of liquid crystal display.
Therefore it provides having good uvioresistant, high-temperature resistance, the liquid-crystal composition that image retention defect improves is this field
Urgent problem to be solved.
Summary of the invention
In order to solve the problems in the existing technology, the inventors of the present invention have made intensive studies, it was found that of the invention
Liquid-crystal composition can improve image retention defect, and the liquid-crystal composition with good uvioresistant, high-temperature resistance.
The present invention also provides liquid crystal display elements and liquid crystal display containing the liquid-crystal composition.
Specifically, the present invention includes the following contents:
The first aspect of the present invention provides a kind of liquid-crystal composition, it includes one or more I compounds represented of formula,
And one or more II compounds represented of formula,
In Formulas I, Z1Indicate that carbon atom number is 1~20 alkylidene, and any one or more hydrogen are appointed in the alkylidene
Choosing be optionally substituted by halogen, any one or more non-conterminous-CH2Optionally replaced by-O-.
Another aspect of the present invention provides a kind of liquid crystal display element, and it includes liquid-crystal composition of the invention, the liquid crystal
Display element is active matrix display element or passive matrix display element.
Another aspect of the present invention provides a kind of liquid crystal display, and it includes liquid-crystal composition of the invention, the liquid crystals
Show that device is Active Matrix Display or passive matrix display.
Liquid-crystal composition of the invention has the characteristics of good uvioresistant, high-temperature resistance and fast response time, and
And image retention defect can be improved.In addition, liquid-crystal composition of the invention has moderate optical anisotropy Δ n, it is lower viscous
Degree, fast response time and good dissolution in low temperature.
Image retention is not present by the inclusion of liquid-crystal composition of the invention in liquid crystal display element of the invention, liquid crystal display
Or image retention is unobvious, and has wider nematic temperature range, suitable or higher optical anisotropy, response speed
Fastly, high voltage holding ratio, good uvioresistant, high temperature resistant property and low threshold voltage.
Specific embodiment
[liquid-crystal composition]
Liquid-crystal composition of the invention, it includes one or more I compounds represented of formula and, one or more formulas
II compound represented,
Wherein: Z1Indicate that carbon atom number is 1~20 alkylidene, and any one or more hydrogen are optional in the alkylidene
It is optionally substituted by halogen, any one or more non-conterminous-CH2Optionally replaced by-O-.
Z above-mentioned1Indicate that carbon atom number is the branch of being also possible to that 1~20 alkylidene can be straight chain.In addition, preceding
Stating alkylidene also optionally has ring structure.Aforementioned alkylidene is preferably linear chain structure.
In liquid-crystal composition of the invention, by using the combination containing compound shown in compound, Formula II shown in Formulas I
Liquid-crystal composition is obtained with good uvioresistant, high-temperature resistance, moderate optical anisotropy Δ n, lower viscous
Degree, fast response time and good dissolution in low temperature can be effectively improved technology effect unexpected as image retention defect
Fruit.
In liquid-crystal composition of the present invention, optionally, compound shown in aforementioned one or more Formulas I is selected from I 1~formula of formula I 12
The group of shown compound composition,
It is further preferred that compound shown in aforementioned one or more Formulas I is selected from chemical combination shown in I 6~formula of formula I 8 above-mentioned
The group of object composition.
Liquid-crystal composition of the invention is preferably positive dielectric anisotropy liquid-crystal composition.
In liquid-crystal composition of the invention, the additive amount (mass ratio) of compound shown in formula I in a liquid crystal composition does not have
It is special to limit, it, can be for relative to the total amount of the other compositions not comprising the liquid-crystal composition including compound shown in Formulas I
Such as 0.01~1%, preferably 0.03~0.2%；The additive amount (mass ratio) of compound shown in formula II in a liquid crystal composition does not have
There is special restriction, relative to the total amount of the other compositions not comprising the liquid-crystal composition including compound shown in Formulas I, Ke Yiwei
Such as 1~50%, preferably 1~30%.
It also include compound shown in one or more following formulas III optionally in liquid-crystal composition of the invention,
In formula III, R2、R3Each independently represent the alcoxyl that alkyl, carbon atom number that carbon atom number is 1~10 are 1~10
The alkenyloxy that the alkenyl or carbon atom number that base, carbon atom number are 2~10 are 3-8；
Expression independent
Compound shown in formula III has the characteristics that rotary viscosity is low, good with other compound intersolubilities.By in the present invention
Liquid-crystal composition in containing compound shown in formula III, be conducive to the response speed for further increasing liquid-crystal composition.
There is no particular limitation for the additive amount (mass ratio) of compound shown in formula III in a liquid crystal composition, relative to not wrapping
The total amount of other compositions containing the liquid-crystal composition including compound shown in Formulas I, can for such as 10~70%, preferably 20~
60%.
Optionally, compound shown in previously described formula III is selected from the group of the composition of compound shown in III 1~formula of formula III 16,
It also include compound shown in one or more following formulas IV optionally in liquid-crystal composition of the invention,
In formula IV, R4Indicate that alkoxy, carbon atom number that alkyl, carbon atom number that carbon atom number is 1~10 are 1~10 are
2~10 alkenyl or carbon atom number is the alkenyloxy of 3-8, and R4In any one or more-CH2Optionally by sub- ring penta
Base, sub- cyclobutyl or cyclopropylidene substitution；
It each independently represents
Z2Indicate singly-bound ,-CH2-、-CH2-CH2-、-(CH2)3-、-(CH2)4,-CH=CH- ,-C ≡ C- ,-COO- ,-
OOC-、-CF2O-、-OCH2-、-CH2O-、-OCF2-、-CF2CH2-、-CH2CF2-、-C2F4Or-CF=CF-；
X1、X2Each independently represent H or F；X3Indicate H, F or methyl；
Y1Expression-F ,-CF3、-OCF3、-OCF2H or-OCH2F；
M indicates 0,1 or 2；
And compound shown in the formula IV does not include II compound represented of formula.
Compound shown in formula IV is positive dielectric anisotropic, further adjusts liquid-crystal composition by compound shown in formula IV
Threshold voltage.
There is no particular limitation for the additive amount (mass ratio) of compound shown in formula IV in a liquid crystal composition, relative to not wrapping
The total amount of other compositions containing the liquid-crystal composition including compound shown in Formulas I, can for such as 1~50%, preferably 10~
30%.
As the R in formula IV above-mentioned4Shown in carbon atom number be 1~10 alkyl in it is one or more it is non-conterminous-
CH2The group obtained after being replaced by cyclopropylidene, sub- cyclobutyl or cyclopentylene, can enumerate such as cyclopropyl, ring fourth
Base, cyclopenta, methyl cyclopropylidene, ethyl cyclopropylidene, propyl cyclopropylidene, isopropyl cyclopropylidene, normal-butyl Asia cyclopropyl
Base, isobutyl group cyclopropylidene, tert-butyl cyclopropylidene, methyl Asia cyclobutyl, ethyl Asia cyclobutyl, propyl Asia cyclobutyl, isopropyl
Base Asia cyclobutyl, normal-butyl Asia cyclobutyl, isobutyl group Asia cyclobutyl, tert-butyl Asia cyclobutyl, methylcyclo-pentylene, ethyl Asia ring
Amyl, propyl cyclopentylene, isopropyl cyclopentylene, normal-butyl cyclopentylene, isobutyl group cyclopentylene etc..R4Shown in group
In, consider to be preferably cyclopropyl or cyclopenta from liquid-crystal compounds rotary viscosity, solubility and clearing point.
Optionally, compound shown in aforementioned one or more formulas IV is selected from the group of the composition of compound shown in IV 1- IV 27 of formula,
R in IV 1~formula of formula IV 2, formula IV 4~IV 274With the R in compound shown in formula IV above-mentioned4Meaning it is identical,
Each independently representing alkoxy, carbon atom number that alkyl, carbon atom number that carbon atom number is 1~10 are 1~10 is 2~10
The alkenyloxy that alkenyl or carbon atom number are 3-8, and R4Any one or more-CH in shown group2Optionally by sub- ring penta
Base, sub- cyclobutyl or cyclopropylidene substitution；
R in formula IV 34Indicate the alkoxy or carbon atom that alkyl, carbon atom number that carbon atom number is 1~10 are 1~10
Count the alkenyloxy for being 3-8, and R4Any one or more-CH in shown group2Optionally by cyclopentylene, sub- cyclobutyl or Asia
Cyclopropyl substitution；
(F) in IV 1~formula of formula IV 6 each independently represents H or F；
In formula IV 7-(O) CF3Expression-CF3Or-OCF3。
It also include compound shown in one or more following formulas V optionally in liquid-crystal composition of the invention,
In formula V, R5、R6Each independently represent the alcoxyl that alkyl, carbon atom number that carbon atom number is 1~10 are 1~10
The chain that alkenyl that alkenyl that base, carbon atom number are 2~10, fluorine-substituted carbon atom number are 2~10, carbon atom number are 3~8
The alkenyloxy that alkenyloxy group or fluorine-substituted carbon atom number are 3~8；
It each independently representsOr
V compound represented of formula has high clearing point and elastic constant, especially splay elastic constant K11, by
In liquid-crystal composition of the invention contain V compound represented of formula above-mentioned, be conducive to promoted liquid-crystal composition clearing point,
And splay elastic constant K11。
In liquid-crystal composition of the invention, containing compound shown in formula V, compound shown in formula V is in liquid
There is no particular limitation for additive amount (mass ratio) in brilliant composition, relative to not comprising the liquid crystal including compound shown in Formulas I
The total amount of the other compositions of composition can be 1~30%, preferably 5~20%.
Optionally, V compound represented of previously described formula is selected from the group of the composition of compound shown in V 1~formula of formula V 4,
Wherein, R51、R61It is independent to indicate the alkyl that carbon atom number is 2~6 or the alkenyl that carbon atom number is 2~6；
Wherein, the alkenyl that carbon atom number above-mentioned is 2~6 can enumerate such as vinyl, 2- acrylic or 3- pentenyl.R62Table
Show that carbon atom number is 1~5 alkoxy.
It also include compound shown in one or more following formulas VI optionally in liquid-crystal composition of the invention,
In formula VI, R7、R8Each independently represent the alcoxyl that alkyl, carbon atom number that carbon atom number is 1~10 are 1~10
The chain that alkenyl that alkenyl that base, carbon atom number are 2~10, fluorine-substituted carbon atom number are 2~10, carbon atom number are 3~8
The alkenyloxy that alkenyloxy group or fluorine-substituted carbon atom number are 3~8；
It indicatesOr
F1、F2、F3Each independently represent H or F, and F2、F3It is not simultaneously F.
VI compound represented of formula has high clearing point.By containing shown in formula VI in liquid-crystal composition of the invention
Compound can promote the clearing point of liquid-crystal composition of the invention significantly.
In the case that liquid-crystal composition of the invention contains compound shown in formula VI, compound shown in formula VI is in liquid crystal combination
There is no particular limitation for additive amount (mass ratio) in object, relative to not comprising the liquid-crystal composition including compound shown in Formulas I
Other compositions total amount, can be 1~10%, preferably 2~5%.
Optionally, VI compound represented of previously described formula is selected from the group of the composition of compound shown in formula VI 1~VI 3,
Wherein, R71、R81It is preferred each independently to indicate the alkyl that carbon atom number is 2~6 or the alkene that atomicity is 2~6
Base.
It also include compound shown in one or more following formulas VII optionally in liquid-crystal composition of the invention,
In formula VII, R9、R10Each independently represent the alcoxyl that alkyl, carbon atom number that carbon atom number is 1~10 are 1~10
The chain that alkenyl that alkenyl that base, carbon atom number are 2~10, fluorine-substituted carbon atom number are 2~10, carbon atom number are 3~8
The alkenyloxy that alkenyloxy group or fluorine-substituted carbon atom number are 3~8, and R9、R10In any one or more non-conterminous-CH2-
Optionally replaced by cyclopentylene, sub- cyclobutyl or cyclopropylidene；
Z3Indicate singly-bound ,-CF2O-、-CH2CH2Or-CH2O-；Z4Indicate singly-bound ,-CH2CH2Or-CH2O-；
It each independently represents
Q indicates 1 or 2；N indicates 0,1 or 2.
Compound shown in formula VII has biggish vertical dielectric, can adjust liquid-crystal composition according to different use conditions
Vertical dielectric constant, liquid-crystal composition can keep low rotary viscosity, with further under the premise of slightly sacrificing response speed
The vertical dielectric constant of liquid-crystal composition is promoted, to obtain the liquid crystal improved on the basis of maintaining certain response speed
Composition transmitance.
In liquid-crystal composition of the invention, the additive amount (mass ratio) of compound shown in formula VII in a liquid crystal composition does not have
It is special to limit, it, can be for relative to the total amount of the other compositions not comprising the liquid-crystal composition including compound shown in Formulas I
Such as 1-30%, preferably 10-25%.
Optionally, compound shown in aforementioned one or more formulas VI is selected from the group of the composition of compound shown in VII 1- VII 21 of formula,
Wherein, R91、R101Each independently represent the alcoxyl that alkyl, carbon atom number that carbon atom number is 1~10 are 1~10
The alkenyloxy that the alkenyl or carbon atom number that base, carbon atom number are 2~10 are 3-8, and R91、R101It is any in shown group
One or more disjunct-CH2Optionally replaced each independently by cyclopentylene, sub- cyclobutyl or cyclopropylidene.
It also include one or more VIII compounds represented of formula optionally in liquid-crystal composition of the invention,
In formula VIII, R11、R12Each independently representing alkyl, fluorine-substituted carbon atom number that carbon atom number is 1~10 is 1
Alkoxy that alkoxy that~10 alkyl, carbon atom number are 1~10, fluorine-substituted carbon atom number are 1~10, carbon atom number are
The alkenyloxy or fluorine that alkenyl that 2~10 alkenyl, fluorine-substituted carbon atom number are 2~10, carbon atom number are 3~8 take
The alkenyloxy that the carbon atom number in generation is 3~8, and R11、R12In any one or more non-conterminous-CH2Optionally by sub- ring
Amyl, sub- cyclobutyl or cyclopropylidene substitution；W expression-O- ,-S- or-CH2O-。
VIII compound represented of formula has bigger vertical dielectric relative to compound shown in formula VII, can be by adding on a small quantity
Add VIII compound represented of formula to obtain bigger vertical dielectric, is conducive to the transmitance for further increasing liquid-crystal composition.
In liquid-crystal composition of the invention, the additive amount (mass ratio) of compound shown in formula VIII in a liquid crystal composition does not have
It is special to limit, it, can be for relative to the total amount of the other compositions not comprising the liquid-crystal composition including compound shown in Formulas I
Such as 1~15%, preferably 2~10%.
Optionally, VIII compound represented of previously described formula is selected from the group of the composition of compound shown in VIII 1~formula of formula VIII 6,
Wherein, R121Indicate that carbon atom number is 2~6 alkyl.
In liquid-crystal composition of the invention, optionally, the dopant of various functions can also be added, contain dopant
In the case of, preferably shared mass percent is 0.01~1% to the content of dopant in a liquid crystal composition, these dopants can
To enumerate such as antioxidant, ultraviolet absorbing agent, chiral agent.
Ultraviolet absorbing agent can enumerate,
T indicates 1~10 integer.
[liquid crystal display element, liquid crystal display]
The invention further relates to the liquid crystal display element comprising liquid-crystal composition of the invention, the display element is active square
Battle array display element or passive matrix display element.
The invention further relates to the liquid crystal display comprising liquid-crystal composition of the invention, the display is aobvious for active matrix
Show device or passive matrix display.
Liquid crystal display element of the invention, liquid crystal display are not deposited by the inclusion of liquid-crystal composition of the invention above-mentioned
It is unobvious in image retention or image retention, and there is wider nematic temperature range, suitable or higher optical anisotropy, high electricity
Press conservation rate, good uvioresistant, high temperature resistant property, fast response speed and low threshold voltage.
For liquid crystal display element of the invention, liquid crystal display, as long as containing liquid-crystal composition of the invention, to it
Structure does not have any restriction, and those skilled in the art can select suitable liquid crystal display element, liquid crystal according to required performance
The structure of display.
Embodiment
In order to illustrate more clearly of the present invention, below with reference to preferred embodiment, the present invention is described further.Ability
Field technique personnel should be appreciated that following specifically described content is illustrative and be not restrictive, this should not be limited with this
The protection scope of invention.
In the present invention, preparation method is then conventional method unless otherwise specified, and raw material used is equal unless otherwise instructed
Can be obtained from disclosed commercial sources, percentage each means mass percent, and temperature is degree Celsius (DEG C), liquid-crystal compounds also at
For liquid crystal monomer, the specific meaning and test condition of other symbols are as follows:
Cp indicates clearing point (DEG C), the test of DSC sizing technique；
Δ n indicates optical anisotropy, Δ n=ne-no, wherein noFor the refractive index of ordinary light, neFor extraordinary ray
Refractive index, test condition are 25 ± 2 DEG C, 589nm, Abbe refractometer test；
Δ ε indicates dielectric anisotropy, Δ ε=ε ∥-ε ⊥, wherein ε ∥ is the dielectric constant for being parallel to molecular axis, ε ⊥
For the dielectric constant perpendicular to molecular axis, test condition is 25 ± 0.5 DEG C, 20 microns of antiparallel boxes, INSTEC:ALCT-CUST-
4C test；
VHR indicates voltage retention (%), and test condition is 20 ± 2 DEG C, voltage is ± 5V, pulse width 10ms, electricity
Press retention time 16.7ms.Test equipment is TOYO Model6254 liquid crystal property comprehensive tester；
γ 1 indicates rotary viscosity (mPas), and test condition is 25 ± 0.5 DEG C, 20 microns of antiparallel boxes, INSTEC:
ALCT-CUST-4C test.
Image retention: the image retention of liquid crystal display device, be make in display area as defined in after fixed pattern shows 1000 hours,
4 grade evaluation below is carried out to solid figuratum residual level when carrying out full frame uniform display by estimating.
◎ noresidue
Zero has minute quantity residual, is admissible level
△ has residual, is unallowable level
× there is residual, mutually it is on duty
Liquid-crystal composition the preparation method is as follows: each liquid crystal monomer is weighed according to a certain ratio after be put into stainless steel beaker
In, the stainless steel beaker equipped with each liquid crystal monomer is placed in heating and melting on magnetic agitation instrument, to the liquid in stainless steel beaker
After brilliant monomer melts, magnetic rotor is added into stainless steel beaker, stirs the mixture for uniformly, being cooled to after room temperature up to liquid crystal
Composition.
Liquid crystal monomer structure used in the embodiment of the present invention indicates with code, liquid crystal ring structure, end group, linking group
Code representation method see the table below 1, table 2.
Table 1: the correspondence code of ring structure
Table 2: the corresponding code of end group and the link group
Citing:
Its code is CC-Cp-V1；
Its code is PGP-Cpr1-2；
Its code is CPUP-3-OT；
Its code is DPUQK-3-F；
Its code is CPY-2-O2；
Its code is CCY-3-O2；
Its code is COY-3-O2；
Its code is CCOY-3-O2；
Its code is Sb-Cp1O-O4；
Its code is Sc-Cp1O-O4.
Embodiment 1:
The formula of liquid-crystal composition and corresponding performance are as shown in table 3 below.
Table 3: the formula of the liquid-crystal composition of embodiment 1 and corresponding performance
Embodiment 2:
The formula of liquid-crystal composition and corresponding performance are as shown in table 4 below.
Table 4: the formula of the liquid-crystal composition of embodiment 2 and corresponding performance
Embodiment 3:
The formula of liquid-crystal composition and corresponding performance are as shown in table 5 below.
Table 5: the formula of the liquid-crystal composition of embodiment 3 and corresponding performance
Embodiment 4:
The formula of liquid-crystal composition and corresponding performance are as shown in table 6 below.
Table 6: the formula of the liquid-crystal composition of embodiment 4 and corresponding performance
Embodiment 5:
The formula of liquid-crystal composition and corresponding performance are as shown in table 7 below.
Table 7: the formula of the liquid-crystal composition of embodiment 5 and corresponding performance
Embodiment 6:
The formula of liquid-crystal composition and corresponding performance are as shown in table 8 below.
Table 8: the formula of the liquid-crystal composition of embodiment 6 and corresponding performance
Comparative example 1:
The formula of liquid-crystal composition and corresponding performance are as shown in table 9 below.
Table 9: the formula of the liquid-crystal composition of comparative example 1 and corresponding performance
Comparative example 2:
The formula of liquid-crystal composition and corresponding performance are as shown in the following table 10.
Table 10: the formula of the liquid-crystal composition of comparative example 2 and corresponding performance
Table 11 is embodiment, comparative example liquid-crystal composition reliability experimental data.
The reliability of liquid-crystal composition, which passes through ultraviolet, high-temperature circulation test and carries out VHR, to be tested to carry out, liquid-crystal composition
VHR data variation ultraviolet, before and after hot test is smaller, and uvioresistant, high-temperature resistance are stronger.Therefore, by comparing each reality
The difference of the VHR data of example, comparative example before and after the test is applied to judge uvioresistant, high-temperature resistance.
Firstly, measuring the VHR data of liquid-crystal composition as initial VHR number before carrying out ultraviolet, high-temperature circulation test
According to, then, to liquid-crystal composition carry out ultraviolet, high-temperature circulation test, after experiment again measure liquid-crystal composition VHR number
According to.
Ultraviolet ageing test: liquid-crystal composition is placed under the ultraviolet lamp that wavelength is 365nm and irradiates 5000mJ energy.
High-temperature circulation test: liquid-crystal composition is placed in 100 DEG C of baking ovens one hour.
VHR data are smaller relative to initial VHR data variation after degradation, illustrate the liquid-crystal composition uvioresistant,
Ability resistant to high temperatures is stronger, gets over so as to judge that the liquid-crystal composition resists the ability that external environment is destroyed during the work time
By force, therefore, the reliability of the liquid-crystal composition is higher.
In addition, embodiment, comparative example liquid-crystal composition are fed into liquid crystal test box, image retention test, test result are carried out
It is shown in following tables 11 together.
Table 11: embodiment, comparative example reliability experimental data
| Compound of formula I | VHR | VHR (ultraviolet) | VHR (high temperature) | Image retention | |
| Embodiment 1 | Ⅰ6 | 99.76 | 99.75 | 99.76 | ◎ |
| Embodiment 2 | Ⅰ7 | 99.68 | 99.65 | 99.66 | ◎ |
| Embodiment 3 | Ⅰ8 | 99.62 | 99.59 | 99.59 | ◎ |
| Embodiment 4 | Ⅰ7 | 99.55 | 99.52 | 99.52 | ◎ |
| Embodiment 5 | Ⅰ7 | 99.52 | 99.50 | 99.49 | ◎ |
| Embodiment 6 | Ⅰ7 | 99.49 | 99.47 | 99.48 | ◎ |
| Comparative example 1 | —— | 99.48 | 99.28 | 99.12 | △ |
| Comparative example 2 | Ⅰ7 | 99.67 | 99.64 | 99.66 | ◎ |
Embodiment 6 and the component in 1 liquid-crystal composition of comparative example are essentially identical, but do not wrap in 1 liquid-crystal composition of comparative example
Containing compound shown in formula I.
From above-mentioned table 11 as can be seen that compared with the combined comparative example 1 for not using compound shown in Formulas I, the present invention
Embodiment liquid-crystal composition is ultraviolet, the VHR decline after high temperature is very subtle.
In addition, liquid-crystal composition of the invention is significantly improved to image retention defect
The liquid-crystal composition of comparative example 2 is compared with the liquid-crystal composition of embodiment 2, using only the CCP-3-OT of same amount
Substitute CCP-V-OT.Liquid-crystal composition of the liquid-crystal composition of comparative example 2 relative to embodiment 2, rotary viscosity γ1, splay bullet
Property coefficient K11Increased.The response speed and γ of liquid-crystal composition1/K11Ratio it is related, γ1/K11Ratio it is smaller, ring
Answer speed faster.Thus, it will be seen that liquid-crystal composition of the liquid-crystal composition response speed of embodiment 2 relative to comparative example 2
Faster.
Claims (9)
1. a kind of liquid-crystal composition, which is characterized in that it includes:
One or more I compounds represented of formula；And
One or more II compounds represented of formula,
In Formulas I, Z1Indicate carbon atom number be 1~20 alkylidene, and in the alkylidene any one or more hydrogen optionally by halogen
Element substitution, any one or more non-conterminous-CH2Optionally replaced by-O-.
2. liquid-crystal composition according to claim 1, which is characterized in that it also includes one or more following III institutes of formula
Show compound,
In formula III, R2、R3Each independently represent the alkoxy, carbon that alkyl, carbon atom number that carbon atom number is 1~10 are 1~10
The alkenyloxy that the alkenyl or carbon atom number that atomicity is 2~10 are 3-8；
It each independently represents
3. according to claim 1 or 2 described in any item liquid-crystal compositions, which is characterized in that it also includes one or more removes
Compound shown in following formulas IV except II compound represented of formula,
In formula IV, R4Indicate that alkoxy, carbon atom number that alkyl, carbon atom number that carbon atom number is 1~10 are 1~10 are 2~10
Alkenyl or carbon atom number be 3-8 alkenyloxy, and R4In any one or more-CH2Optionally by cyclopentylene, sub- ring
Butyl or cyclopropylidene substitution；
Expression independent
Z2Indicate singly-bound ,-CH2-、-CH2-CH2-、-(CH2)3-、-(CH2)4,-CH=CH- ,-C ≡ C- ,-COO- ,-OOC- ,-
CF2O-、-OCH2-、-CH2O-、-OCF2-、-CF2CH2-、-CH2CF2-、-C2F4Or-CF=CF-；
X1、X2Each independently represent H or F；X3Indicate H, F or methyl；
Y1Expression-F ,-CF3、-OCF3、-OCF2H or-OCH2F；
M indicates 0,1 or 2.
4. described in any item liquid-crystal compositions according to claim 1~3, which is characterized in that under it also includes one or more
Compound shown in the formula V stated,
In formula V, R5、R6Each independently represent the alkoxy, carbon that alkyl, carbon atom number that carbon atom number is 1~10 are 1~10
The alkene oxygen that alkenyl that alkenyl that atomicity is 2~10, fluorine-substituted carbon atom number are 2~10, carbon atom number are 3~8
The alkenyloxy that base or fluorine-substituted carbon atom number are 3~8；
It each independently representsOr
5. liquid-crystal composition according to any one of claims 1 to 4, which is characterized in that also comprising one or more following
Formula VI shown in compound,
In formula VI, R7、R8Each independently represent the alkoxy, carbon that alkyl, carbon atom number that carbon atom number is 1~10 are 1~10
The alkene oxygen that alkenyl that alkenyl that atomicity is 2~10, fluorine-substituted carbon atom number are 2~10, carbon atom number are 3~8
The alkenyloxy that base or fluorine-substituted carbon atom number are 3~8；
It indicatesOr
F1、F2、F3Each independently represent H or F, and F2、F3It is not simultaneously F.
6. described in any item liquid-crystal compositions according to claim 1~5, which is characterized in that under it also includes one or more
Compound shown in the formula VII stated,
In formula VII, R9、R10Each independently represent alkoxy that alkyl, carbon atom number that carbon atom number is 1~10 are 1~10,
The alkene that alkenyl that alkenyl that carbon atom number is 2~10, fluorine-substituted carbon atom number are 2~10, carbon atom number are 3~8
The alkenyloxy that oxygroup or fluorine-substituted carbon atom number are 3~8, and R9、R10In any one or more non-conterminous-CH2Appoint
Choosing is replaced by cyclopentylene, sub- cyclobutyl or cyclopropylidene；
Z3Indicate singly-bound ,-CF2O-、-CH2CH2Or-CH2O-；Z4Indicate singly-bound ,-CH2CH2Or-CH2O-；
It each independently represents
Q indicates 1 or 2；N indicates 0,1 or 2.
7. described in any item liquid-crystal compositions according to claim 1~6, which is characterized in that the liquid-crystal composition also includes
One or more VIII compounds represented of formula,
In formula VIII, R11、R12Each independently representing alkyl, fluorine-substituted carbon atom number that carbon atom number is 1~10 is 1~10
Alkoxy that alkoxy that alkyl, carbon atom number are 1~10, fluorine-substituted carbon atom number are 1~10, carbon atom number are 2~10
Alkenyl, fluorine-substituted carbon atom number be 2~10 alkenyl, carbon atom number be 3~8 alkenyloxy or fluorine-substituted carbon
The alkenyloxy that atomicity is 3~8, and R11、R12In any one or more non-conterminous-CH2Optionally by cyclopentylene,
Sub- cyclobutyl or cyclopropylidene substitution；
W expression-O- ,-S- or-CH2O-。
8. a kind of liquid crystal display element, it includes liquid-crystal composition according to any one of claims 1 to 7, the display member
Part is active matrix display element or passive matrix display element.
9. a kind of liquid crystal display, it includes liquid-crystal composition according to any one of claims 1 to 7, the liquid crystal display
Device is Active Matrix Display or passive matrix display.
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