CN105238417B - Liquid crystal composition and display element or displayer with same - Google Patents
Liquid crystal composition and display element or displayer with same Download PDFInfo
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Abstract
The invention discloses a liquid crystal composition and a display element or displayer with the same. The liquid crystal composition has one or more compositions of the general formula I, compositions of the general formula II and compositions of the general formula III, wherein the formulas can be seen in the specification, R1, R3 and R4 represent gaseous normal alkyl with 1-5 carbon atoms, R2 represents gaseous normal alkyl with 1-5 carbon atoms and alkenyl with 2-5 carbon atoms, and R5 represents H or gaseous normal alkyl with 1-3 carbon atoms. The liquid crystal composition is high in response speed, large in dielectric anisotropy, moderate in optical anisotropy, and high in light and heat stability and particularly suitable for IPS liquid crystal displays devices.
Description
Technical field
Liquid crystal display cells or liquid crystal display the present invention relates to a kind of liquid-crystal composition and comprising the liquid-crystal composition.
Background technology
At present, what the range of application of liquid-crystal compounds was expanded is increasingly wider, and it can be applied to polytype display, electricity
In optical device, sensor etc..Species for the liquid-crystal compounds of above-mentioned display field is various, and wherein nematic liquid crystal application is most
For extensive.Nematic liquid crystal is had been applied in passive TN, STN matrix display and the system with tft active matrix.
For thin-film transistor technologies (TFT-LCD) application field, although market is very huge in recent years, technology
Gradually maturation, but requirement of the people to Display Technique is also constantly being improved, and especially is realizing quick response, reducing to drive electricity
Press to reduce the aspects such as power consumption.Liquid crystal material as one of important photoelectron material of liquid crystal display, to improving liquid crystal display
The important effect of the performance of device.
As liquid crystal material, it is necessary to have good chemically and thermally stability and to electric field and the stabilization of electromagnetic radiation
Property.And as thin-film transistor technologies (TFT-LCD) liquid crystal material, do not need only have as outside upward stability, should also have
Nematic temperature range, suitable birefringence anisotropy, resistivity very high, good uviolresistance wider
The performances such as energy, electric charge conservation rate high and low-steam pressure.
Process is shown in dynamic menu, it is desirable to be able to eliminate ghost and the hangover of display picture as far as possible, it is desirable to which liquid crystal has
Response speed quickly, therefore it is required that liquid crystal has relatively low rotary viscosity γ1；In addition, for portable set, in order to reduce
Equipment energy consumption, it is desirable to which the driving voltage of liquid crystal is as low as possible；And for the display of the purposes such as TV, for the drive of liquid crystal
Dynamic voltage request is not so low.
The viscosity of liquid-crystal compounds, especially rotary viscosity γ1The response time after liquid crystal power-up is directly affected, either
Rise time (ton) or fall time (toff), all with the rotary viscosity γ of liquid crystal1It is proportional, rise time (ton) by
In relevant with liquid crystal cell and driving voltage, can be adjusted with liquid crystal cell box thickness is reduced by increasing the method for driving voltage；And
Fall time (toff) unrelated with driving voltage, the elastic constant mainly with liquid crystal is relevant with liquid crystal cell box thickness, the thick decline of box
(t can be reduced fall timeoff), and under different display modes, the motion mode of liquid crystal molecule is different, tri- kinds of moulds of TN, IPS, VA
Formula respectively at average elastic constants K, distortion elastic constant, bend elastic constant inversely.
According to liquid crystal continuum theory, after a variety of liquid crystal are deformed upon under external force (electric field, magnetic field) effect, meeting
By intermolecular interaction, original shape is returned in meeting " resilience "；Likewise, liquid crystal is also due to intermolecular interaction
Power forms " viscosity ".The minor variations of liquid crystal molecule, can make the conventional parameter performance of liquid crystal that obvious change occurs, these changes
Has plenty of certain rule, being almost difficult of having finds rule, and liquid crystal material and its proportioning etc. are for the phase between liquid crystal molecule
Interaction can also produce obvious influence, and these influences are very delicate, and very perfect theoretical explanation is not formed so far yet.
The viscosity of liquid crystal is relevant with liquid crystal molecule structure, studies the viscosity and liquid of the liquid crystal system that different liquid crystal molecules are formed
Relation between brilliant molecular structure is one of vital task of dispensing liquid crystal engineer.
The content of the invention
The technical problem to be solved in the invention is to provide a kind of liquid-crystal composition and the liquid crystal comprising the liquid-crystal composition
Display element or liquid crystal display, the liquid-crystal composition have relatively low viscosity, it is possible to achieve quick response, while having larger
Dielectric anisotropy Δ ε, moderate optical anisotropy Δ n, the stability to light and heat high, good uviolresistance
The performances such as energy, electric charge conservation rate high and low-steam pressure.
In order to solve the above technical problems, the technical solution adopted in the present invention is：
A kind of liquid-crystal composition, contains one or more generalformulaⅰcompound, one or more compound of formula II, one kind
Or various general formula III compounds,
Wherein, R1、R3、R4Represent the straight chained alkyl that carbon number is 1~5, R2Represent the straight chain alkane that carbon number is 1~5
Base, carbon number are 2~5 alkenyl；R5Represent H or the straight chained alkyl that carbon number is 1~3.
Δ n [589nm, 25 DEG C] ＞ 0.08, Δ ε [1KHz, 25 DEG C] ＞ of above-mentioned liquid-crystal composition provided by the present invention
70.0 DEG C of 2, clearing point Cp ＞, rotary viscosity γ1[25 DEG C] are between 40~110mPas.
The compound quality percentage composition of liquid-crystal composition formula of provided by the present invention I is 5~30%, the chemical combination of formula II
Amount of substance percentage composition is 5~20%, and general formula III compound quality percentage composition is 20~50%.
Further improvement of the present invention is：Generalformulaⅰcompound is formula I 1~I 4 compounds, and the compound of formula II is formula II
1~II 25 general formula compounds, general formula III compound is formula III 1~III 4 compounds,
Each compound dielectric anisotropy Δ ε shown in formula I 1~I 4 has low simultaneously between 25~30
Rotary viscosity, more than 120 DEG C, Δ n is more than 0.2 for clearing point.Be conducive in improve liquid-crystal composition Δ ε, improve clearing point,
Improve Δ n.
Compound shown in formula II 1~II 25 generally has the optical anisotropy Δ n of suitable size, moderate clearing point
Value.Wherein, II 1 to II 15 end alkyl compound has preferable high temperature resistance and anti-UV stability, II 16 to II 25 end alkene
Based compound has a larger elastic constant K values, relatively low viscosity and faster response speed.
Compound shown in general formula III 1~III 4 has very low rotary viscosity γ1, close to neutral dielectric anisotropy
Δ ε, less optical anisotropy Δ n, have advantage liquid crystal viscosity, cryogenic property is improved.Different alkyl substituents pair
The rotary viscosity γ of liquid crystal1, clearing point CP all there is influence, general alkyl chain more long or alkenylene chain can increase the rotation of liquid crystal
Turn viscosity γ1Clearing point CP is improved simultaneously.
Compound shown in one or more formula IV can also be added in liquid-crystal composition provided by the present invention,
R6Represent the alkyl that carbon number is 2~5.Alkyl chain carbon atomicity is more, and the CP of liquid crystal can be higher, but glues simultaneously
Degree can increase.
Further improvement of the present invention is：The compound of formula IV is formula IV 1~IV 4 compounds, liquid-crystal composition Chinese style IV
The weight/mass percentage composition of shown compound is 1~25%,
Each compound shown in formula IV has medium Δ ε (6 or so), CP higher, and relatively low viscosity is applied to regulation
The viscosity of liquid crystal, CP, Δ ε.
Liquid-crystal composition provided by the present invention, can also add compound, liquid crystal combination shown in one or more formula V
The mass content of selecting of chemical combination shown in thing Chinese style V is 1~25%,
R7Represent the alkenyl that carbon number is 2~5.
Further improvement of the present invention is：Compound shown in formula V is formula V 1~V 2 compounds,
Compound shown in formula V is with compound phase shown in formula IV than with CP higher, relatively low viscosity especially has
Bigger elastic constant.Be conducive to improving response speed.
Compound shown in one or more formula VI can also be added in liquid-crystal composition provided by the present invention,
R8、R9It is the straight chained alkyl that carbon number is 1~5；(F) hydrogen or fluorine are represented.
Compound shown in formula VI has larger elastic constant K (K11、K22、K33It is all larger), clearing point CP high (is higher than
200 DEG C), but also there is viscosity γ bigger than normal simultaneously1, can be used for the K value parameters of adjustable liquid crystal display and clearing point CP.
Compound preferred formula VI 1 shown in formula VI~VI 8 compounds,
Substantially close to neutrality, VI 1 to VI 5 compounds also have lateral fluorine to VI 1 to VI 8 compound dielectric anisotropy Δ ε
Atom, is conducive to improving the intersolubility of liquid crystal.
Compound preferred mass content shown in liquid-crystal composition Chinese style VI provided by the present invention is 1-15%.
The different proportion of each composition of liquid-crystal composition, can show slightly discrepant performance, such as dielectric anisotropy Δ
ε, optical anisotropy Δ n, the nematic phase of liquid crystal are converted into the transition temperature point CP of liquid, low temperature stability inferior all can be poor
It is different, can apply to different types of display device, but it is identical the characteristics of be its rotary viscosity γ1It is relatively low.It is applied to liquid crystal
Display device, it is possible to achieve quick response.
The dopant of various functions can also be added in liquid-crystal compounds provided by the present invention, dopant content is preferred
Between 0.01~1%, these dopants are mainly antioxidant, ultra-violet absorber, chiral agent.Antioxidant, ultraviolet are inhaled
Receive agent and be preferably as follows compound：
S in above formula is 1~10 integer.
Chiral agent preferably (left-handed or dextrorotation) following compound：
The invention further relates to liquid crystal display cells or display comprising above-mentioned any one liquid-crystal composition, the display
Element or display are active matrix display element or display, passive matrix display element or display.
The liquid crystal display cells or the preferred active array addressing liquid crystal display cells of liquid crystal display or liquid crystal display.
The active matrix display element or display are specially TN-TFT or IPS-TFT liquid crystal display cells or display
Device.
By adopting the above-described technical solution, the technological progress that the present invention is obtained is：
Liquid-crystal composition provided by the present invention has relatively low viscosity, it is possible to achieve quick response, while having moderate
Dielectric anisotropy Δ ε, moderate optical anisotropy Δ n, the stability to light and heat high.
Liquid crystal material comprising liquid-crystal composition provided by the present invention, not only with good chemically and thermally stability with
And to electric field and the stability of electromagnetic radiation.And, liquid crystal material is used as thin-film transistor technologies (TFT-LCD), also have
Nematic temperature range, suitable birefringence anisotropy, resistivity very high, good uviolresistance wider
The performances such as energy, electric charge conservation rate high and low-steam pressure.
Specific embodiment
The present invention is described in further details with reference to specific embodiment, but the present invention is not limited to following implementation
Example.Methods described is conventional method unless otherwise instructed.The raw material unless otherwise instructed can be from open commercial sources
.The percentage unless otherwise instructed, is mass percent.
In following embodiments, CP represents clearing point, is directly determined using the micro- thermal analyzers of WRX-1S, sets heating rate
It is 3 DEG C/min.
Δ n represents optical anisotropy (589nm, 20 DEG C), Δ ε represent dielectric anisotropy (25 DEG C, 1KHz,
HP4284A, 5.2 microns of left-handed boxes of TN), γ1Rotary viscosity (mpas) when representing 20 DEG C, VHR (%) represents electric charge conservation rate
(5V, 60Hz, 20 DEG C), ρ (× 1013Ω cm) represent resistivity (20 DEG C), the tester and resistance of voltage retention VHR (%)
Rate ρ (× 1013Ω cm) it is TOYO06254 and TOYO6517 type liquid crystal evaluation of physical property system (20 DEG C of test temperature, time
16ms, testing cassete is 7.0 microns).
The present patent application embodiment liquid crystal monomer structure represents with code, liquid crystal ring structure, end group, the code of linking group
Method for expressing see the table below (one), table (two).
Table (one)：The corresponding code of ring structure
Table (two)：End group and the corresponding code for linking group
| End group with link group | Correspondence code |
| CnH2n+1- | n |
| CnH2n+1O- | nO |
| -CF2O- | Q |
| -F | F |
| -CH2=CH2- | V |
Citing：
It is expressed as 3CCV1,
It is expressed as 3BB (3F) B (3F, 5F) Q B (3F, 5F) F.
Embodiment 1
Embodiment 2
Embodiment 3
Embodiment 4
Embodiment 5
Embodiment 6
Embodiment 7
Embodiment 8
As can be seen from the above embodiments：Liquid-crystal composition of the invention has relatively low rotary viscosity γ1, for liquid crystal
Display, it is possible to achieve quick response.It is particularly suitable for TN, IPS pattern liquid crystal material.
Claims (6)
1. a kind of liquid-crystal composition, contains one or more generalformulaⅰcompound, one or more compound of formula II, Yi Zhonghuo
Various general formula III compounds,
Wherein, R1、R3、R4Represent the straight chained alkyl that carbon number is 1~5, R2Represent straight chained alkyl, carbon that carbon number is 1~5
Atomicity is 2~5 alkenyl；R5Represent H or the straight chained alkyl that carbon number is 1~3；
Also contained IV compound, the compound of formula V, the compound of formula VI,
Wherein, R6Represent the alkyl that carbon number is 2~5；
R7Represent the alkenyl that carbon number is 2~5；
R8、R9It is the straight chained alkyl that carbon number is 1~5；(F) it is hydrogen or fluorine；
Generalformulaⅰcompound weight/mass percentage composition is 5~30%, and the compound quality percentage composition of formula II is 5~20%, general formula III
Compound quality percentage composition is 20~50%, and the compound quality percentage composition of formula IV is 1~25%, the compound quality hundred of formula V
Content is divided to be 1~25%, the compound quality percentage composition of formula VI is 1~15%.
2. liquid-crystal composition according to claim 1, it is characterised in that：Generalformulaⅰcompound is formula I 1~I 4 compounds, is led to
The compound of formula II is formula II 1~II 25 general formula compounds, and general formula III compound is formula III 1~III 4 compounds,
3. liquid-crystal composition according to claim 2, it is characterised in that：The compound of formula IV is formula IV 1~IV 4 compounds,
4. liquid-crystal composition according to claim 3, it is characterised in that：The compound of formula V is formula V 1~V 2 compounds,
5. liquid-crystal composition according to claim 4, it is characterised in that：Compound shown in formula VI is formula VI 1~VI 8 chemical combination
Thing,
6. the liquid-crystal composition according to any one of Claims 1 to 5, it is characterised in that：The chemical combination of liquid-crystal composition formula of I
Amount of substance percentage composition is 6~20%, and the compound quality percentage composition of formula II is 5~15%, general formula III compound quality hundred
Content is divided to be 20~42%, the weight/mass percentage composition of the compound of formula IV is 10~20%, the weight/mass percentage composition of the compound of formula V
It is 8~20%, the weight/mass percentage composition of the compound of formula VI is 5~15%.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510672311.7A CN105238417B (en) | 2015-10-16 | 2015-10-16 | Liquid crystal composition and display element or displayer with same |
| TW104143900A TWI588245B (en) | 2015-10-16 | 2015-12-25 | Liquid crystal composition |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510672311.7A CN105238417B (en) | 2015-10-16 | 2015-10-16 | Liquid crystal composition and display element or displayer with same |
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| CN105238417B true CN105238417B (en) | 2017-05-24 |
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| EP1862526B1 (en) * | 2006-05-31 | 2009-10-14 | Chisso Corporation | Liquid crystal compositions and liquid crystal display device |
| JP5544849B2 (en) * | 2009-12-01 | 2014-07-09 | Ｊｎｃ株式会社 | Liquid crystal composition and liquid crystal display element |
| JP5729149B2 (en) * | 2011-06-08 | 2015-06-03 | Jnc株式会社 | Liquid crystal composition and liquid crystal display element |
| WO2013075400A1 (en) * | 2011-11-24 | 2013-05-30 | 石家庄诚志永华显示材料有限公司 | Liquid crystal compound |
| CN103074073B (en) * | 2012-12-20 | 2015-03-11 | 石家庄诚志永华显示材料有限公司 | Negative dielectric anisotropic liquid crystal mixture |
| JP5565530B1 (en) * | 2013-03-04 | 2014-08-06 | Ｄｉｃ株式会社 | Liquid crystal composition and liquid crystal display device using the same |
| CN103320145B (en) * | 2013-06-28 | 2015-01-07 | 石家庄诚志永华显示材料有限公司 | Fast response liquid crystal composition containing difluoromethylene ether |
| CN103555348A (en) * | 2013-11-07 | 2014-02-05 | 石家庄诚志永华显示材料有限公司 | Liquid crystal composition and application thereof |
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| CN105238417A (en) | 2016-01-13 |
| TWI588245B (en) | 2017-06-21 |
| TW201715026A (en) | 2017-05-01 |
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