CN101195748A - Liquid crystal medium and liquid crystal display - Google Patents
Liquid crystal medium and liquid crystal display Download PDFInfo
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- CN101195748A CN101195748A CNA2007101620853A CN200710162085A CN101195748A CN 101195748 A CN101195748 A CN 101195748A CN A2007101620853 A CNA2007101620853 A CN A2007101620853A CN 200710162085 A CN200710162085 A CN 200710162085A CN 101195748 A CN101195748 A CN 101195748A
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- 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
- C09K19/46—Mixtures of liquid crystal compounds covered by two or more of the preceding groups C09K19/06 - C09K19/40 containing esters
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- 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
- C09K19/10—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings
- C09K19/20—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings linked by a chain containing carbon and oxygen atoms as chain links, e.g. esters or ethers
- C09K19/2007—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings linked by a chain containing carbon and oxygen atoms as chain links, e.g. esters or ethers the chain containing -COO- or -OCO- groups
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- 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
- C09K19/3028—Cyclohexane rings in which at least two rings are linked by a carbon chain containing carbon to carbon single bonds
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- 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
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- 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
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- 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
- C09K19/10—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings
- C09K19/20—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings linked by a chain containing carbon and oxygen atoms as chain links, e.g. esters or ethers
- C09K19/2007—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings linked by a chain containing carbon and oxygen atoms as chain links, e.g. esters or ethers the chain containing -COO- or -OCO- groups
- C09K2019/2035—Ph-COO-Ph
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- 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
- C09K19/3003—Compounds containing at least two rings in which the different rings are directly linked (covalent bond)
- C09K2019/3004—Cy-Cy
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- C—CHEMISTRY; METALLURGY
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- 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
- C09K19/3003—Compounds containing at least two rings in which the different rings are directly linked (covalent bond)
- C09K2019/3009—Cy-Ph
Abstract
The present invention relates to a liquid crystal medium which includes a first dielectric positive component, a component A, a second dielectric positive component, and a component B, the component A includes one or a plurality of compounds of formula I and one or a plurality of compounds chosen from formulas of II and III, the component B includes one or a plurality of compounds of formula IV, wherein the parameter has the meaning defined in the instruction book; the invention also relates to a liquid crystal display device including these mediums, especially TN- and STN display device, in particular STN display device.
Description
Technical field
The present invention relates to liquid crystal media and the liquid-crystal display that comprises these media, relate in particular to indicating meter, particularly STN Super TN (STN) escope by sequential multiplex transmission (time sequential multiplexing) addressing.
Background technology
Liquid-crystal display (LCD) is widely used in demonstration information.Used electrooptics pattern is, for example, twisted nematic (TN)-, STN Super TN (STN)-, optical compensation curved (OCB)-and electrically conerolled birefringence (ECB)-pattern and their various modification, and other pattern.All these patterns all use be basically perpendicular to substrate in other words (respectively) perpendicular to the electric field of liquid crystal layer, except that these patterns, also exist to use and be basically parallel to the electrooptics pattern that substrate is parallel to the electric field of liquid crystal layer in other words, for example in-plane-switching mode (as disclosed among DE 4000451 and the EP 0588568).This electrooptics pattern is particularly useful for modern table and goes up the LCD of watch-dog, and is conceived to be used for the display application of multimedia application.
TN-and STN indicating meter are widely used in, for example, and portable phone and game machine.Except their lower production cost, some in their great advantage are their low relatively requirement and their relative low watt consumptions aspect operating voltage.Liquid crystal of the present invention preferably is used in such indicating meter.
For these indicating meters, need have the novel liquid crystal medium of improved performance.Dielectric anisotropy (Δ ε) especially should be enough high to realize low operating voltage rationally.Preferably, Δ ε should be higher than 30, very preferably is higher than 45, but preferably is not higher than 80, particularly is not higher than 70.Otherwise, even for for the more undemanding most of STN indicating meters of being compared by the indicating meter (AM LCD or AMD) of the matrix addressing of electroactive unit in this respect of requirement, it is unacceptably low that the resistivity of mixture is also tended to become.Except this parameter, this medium also must show suitably wide nematic phase range, the double refraction in correct scope for electric optical effect to be utilized (Δ n), quite little rotary viscosity and as mentioned above, the sufficiently high at least resistivity that compares.
Indicating meter of the present invention is preferably by the sequential multiplex transmission, for example by as the orthogonal waveforms scheme that proposes by Alt and Pleshko, but also so-called active-addressedly carry out addressing by what be particularly useful for quick switching display.But liquid crystal of the present invention also can be advantageously utilised in the indicating meter of other known address mode of employing.
There is the display mode of various use combinations of low molecular weight liquid crystals material together with the compound system of polymer-based material, for example, Polymer Dispersed Liquid Crystal (PDLC)-, nematic curve orientation phase (NCAP)-and polymer network (PN)-system, for example among the WO 91,/05 029 disclosed those, or axial symmetrical microcell (ASM) system and other system.Opposite with these, especially preferred pattern is to use directed from the teeth outwards liquid crystal media itself according to the present invention.These surfaces are usually through the homogeneous orientation of pre-treatment with the realization liquid crystal material.Display mode of the present invention preferably uses the electric field substantially parallel with composite bed.
LCD is used for straight watching display, and is used for projection type display.
Be applicable to LCD, the liquid-crystal composition that is particularly useful for the STN indicating meter is for example from US6, and is known in 730,372.But these compositions have remarkable shortcoming really.Except other defective, the great majority in them especially have too low resistivity value and/or need too high operating voltage.Many also causing the permanent unfriendly time of response in them.
Therefore, be starved of and have the performance that is suitable for practical application, for example wide nematic phase range, low viscosity is according to the suitable optical anisotropy Δ n of used display mode and the liquid crystal media of particularly high Δ ε.
Summary of the invention
Astoundingly, have been found that now can realize having suitably high Δ ε, suitable phase scope and the liquid crystal media of Δ n, it does not show the shortcoming of prior art material or shows these shortcomings at least on obviously lower degree.
The improved liquid crystal media of these of the application comprises following at least component:
-the first dielectric positivity component, component A, its compound that comprises one or more formulas I is selected from the compound of formula II and III with one or more
Wherein
R
1, R
2And R
3For to have alkyl, alkoxyl group, the fluorinated alkyl of 1 to 7 carbon atom or to fluoridize alkoxyl group, have alkenyl, alkenyloxy, the alkoxyalkyl of 2 to 7 carbon atoms or fluoridize alkenyl independently of one another, and R
1Be preferably alkenyl, and
M is 0 or 1,
With
-the second dielectric positivity component, B component, it comprises the compound of one or more formulas IV
Wherein
R
4Have in formula II part R
2The implication that provides,
Z
4Be-CO-O-or singly-bound,
X
4Be F or OCF
3And
Y
4Be H or F and
-randomly, and another (the 3rd) dielectric positivity component, component C,
-randomly, and the dielectric neutral component, component D,
-randomly, dielectric negativity component, component E and
-randomly, and preferably necessarily, chiral component, component F.
Preferably, the first dielectric positivity component, component A, comprise one or more and have 20 or bigger, preferred 30 or the strong dielectric positive compounds of bigger dielectric anisotropy, and preferably one or more respectively do for oneself formula I and III, most preferably formula I, II and III compound, more preferably mainly form, more preferably form by it substantially, especially preferably form by it fully by described compound.
Preferably, liquid crystal compound of the present invention comprise one or more wherein m be the compound of 0 formula III, and/or one or more wherein m be the compound of 1 formula III.
In a preferred embodiment of the invention, liquid crystal compound of the present invention comprises the compound of one or more respectively do for oneself formula I, II and III.
Preferably, the second dielectric positivity component, B component, comprise one or more and have 3 to 19, the dielectric positive compounds of preferred 5 to 16 dielectric anisotropy, and the preferred compound of one or more formulas IV more preferably mainly are made up of described compound, more preferably form by it substantially, especially preferably form by it fully.
Preferably, liquid crystal compound of the present invention comprises one or more wherein X
4Be OCF
3And Y
4Compound for the formula IV of H.
Further preferably, liquid crystal compound of the present invention comprises one or more wherein X
4Be F and Y
4Compound for the formula IV of F.
In a preferred embodiment of the invention, liquid crystal compound of the present invention comprises the compound of the formula IV of one or more compounds that are selected from formula IVa to IVd.
R wherein
4Has the implication that above provides.
In a preferred embodiment of the invention, liquid crystal compound of the present invention comprises the compound of one or more formulas IVa.
In a preferred embodiment of the invention, liquid crystal compound of the present invention comprises the compound of one or more formulas IVb, and/or one or more are selected from the compound of the compound of formula IVc and IVd.
In a preferred embodiment of the invention, the second dielectric positivity component, B component comprises the compound that one or more are selected from the formula IV of formula IVa to IVd, more preferably mainly is made up of described compound, more preferably is made up of it substantially, especially preferably is made up of it fully.
Preferably, liquid crystal compound of the present invention comprises other (the 3rd) dielectric positivity component, component C.This component has more than 3, and is preferred 3 to 19, most preferably 5 to 15 dielectric anisotropy.Preferably, it comprises the dielectric positive compounds, more preferably mainly is made up of described compound, more preferably is made up of it substantially, especially preferably is made up of it fully.Preferably, this component comprises the dielectric positive compounds of one or more formulas V, more preferably mainly is made up of described compound, more preferably is made up of it substantially, especially preferably is made up of it fully.
Wherein
R
5Have in above-mentioned formula II part R
2The implication that provides,
Preferably
Z
51And Z
52Be independently of one another, and at Z
51Occur that these also are-CH independently of one another under twice the situation
2CH
2-,-COO-, trans-CH=CH-, trans-CF=CF-,-CH
2O-,-CF
2O-or singly-bound, preferably wherein at least one is a singly-bound, most preferably, if exist, wherein at least two is singly-bound,
X
5Be F, Cl, haloalkyl, halogenated alkoxy, halogenated alkenyl or halo alkenyloxy, wherein " halo " is preferably fluoro and/or chloro, preferred halo, and preferred X
5Be F, OCF
3Or OCF
2H,
N is 0,1 or 2, preferred 1 or 2,
And therefrom get rid of the compound of formula IVa to IVd.
Preferably, liquid crystal compound of the present invention also contains at least a other component except component A and B.This 3rd component can be among component C, D and the E any.Preferably, existing the 3rd component is component C or D, and especially preferably it is component C.
Obviously, mixture of the present invention also can contain four kinds in these components, preferred ingredient A, B, C and D, and all these four kinds, this depends on the circumstances.
Preferably, liquid crystal compound of the present invention comprises dielectric neutral component, component D.This component has-1.5 to+3 dielectric anisotropy.Preferably, it comprises one or more dielectric neutral compounds, more preferably mainly is made up of described compound, more preferably is made up of it substantially, especially preferably is made up of it fully.Preferably, this component comprises the dielectric neutral compound of one or more formulas VI, more preferably mainly is made up of described compound, more preferably is made up of it substantially, especially preferably form by it fully,
R wherein
61And R
62Have independently of one another in above-mentioned formula I part R
2The implication that provides,
With
Be independently of one another, and
Occur that these also are independently of one another under twice the situation
Preferably
Z
61And Z
62Be independently of one another, and at Z
61Occur that these also are-CH independently of one another under twice the situation
2CH
2-,-COO-, trans-CH=CH-, trans-CF=CF-,-CH
2O-,-OCH
2-,-CF
2O-,-OCO
2-or singly-bound, preferably wherein at least one is a singly-bound, most preferably, if exist, wherein at least two is singly-bound, and
1 is 0,1 or 2.
In a preferred embodiment of the invention, liquid crystal compound of the present invention comprises the compound of the formula V of one or more compounds that are selected from formula Va to Vf
Wherein
R
5Be to have alkyl, alkoxyl group, the fluorinated alkyl of 1 to 7 carbon atom or fluoridize alkoxyl group, have alkenyl, alkenyloxy, the alkoxyalkyl of 2 to 7 carbon atoms or fluoridize alkenyl,
X
5Be F, Cl or have the fluorinated alkyl of 1 to 4 carbon atom separately or fluoridize alkoxyl group independently of one another, or have fluoridizing alkenyl or fluoridizing alkenyloxy of 2 to 4 carbon atoms separately, preferred F, OCF
3Or OCF
2H,
L
51To L
56Be H or F independently of one another, preferably wherein at least one, preferred L
51Be F, more preferably wherein two or more, be preferably selected from L
51, L
52And L
53In two or more be F.
Especially preferred is to contain the liquid crystal compound that one or more are selected from the compound of formula Va-1 to Va-4, Vb-1 to Vb-15, Vc-1 to Vc-4, Vd-1 to Vd-8, Ve-1 to Ve-4, Vf-1 to Vf-4 and Vg-1 to Vg-4 compound
Wherein
R
5Be to have alkyl, alkoxyl group, the fluorinated alkyl of 1 to 7 carbon atom or fluoridize alkoxyl group, have alkenyl, alkenyloxy, the alkoxyalkyl of 2 to 7 carbon atoms or fluoridize alkenyl.
In a preferred embodiment of the invention, liquid crystal compound of the present invention comprises the compound of one or more formulas Vf-4.
Of the present invention can with another identical or different preferred embodiment of previous embodiment in, liquid crystal compound of the present invention comprises component D, it comprises and is selected from formula VIa to VIh, be preferably selected from VIa to VId and VIg, most preferably be selected from the compound of formula VI of the compound of VIa and VIg, preferably mainly form, most preferably form by it fully by described compound
R wherein
61And R
62Be independently of one another, have alkyl, alkoxyl group, the fluorinated alkyl of 1 to 7 carbon atom or fluoridize alkoxyl group, have alkenyl, alkenyloxy, the alkoxyalkyl of 2 to 7 carbon atoms or fluoridize alkenyl, and
L
6Be H or F.
In a preferred embodiment of the invention, liquid crystal compound of the present invention comprises the compound of one or more formulas VIg.
Preferably, liquid crystal compound comprises one or more compounds that is selected from the following compounds group
The compound of-Shi VIa, wherein R
61And R
62Be alkyl,
The compound of-Shi VIa, wherein R
61Be alkyl and R
62Be alkoxyl group,
The compound of-Shi VIa, wherein R
61Be alkyl and R
62Be alkenyl,
The compound of-Shi VIb, wherein R
61And R
62Be alkyl,
The compound of-Shi VIb, wherein R
61Be alkyl and R
62Be alkoxyl group,
The compound of-Shi VIc, wherein R
61And R
62Be alkyl,
The compound of-Shi VIc, wherein R
61Be alkyl and R
62Be alkoxyl group,
The compound of-Shi VIc, wherein R
61Be alkyl and R
62Be alkenyl and
The compound of-Shi VId, wherein R
61And R
62It is alkyl.
-especially preferred liquid crystal compound also comprises the compound of one or more formulas VIa except one or more are selected from the compound of formula VIb to VId and VIg, especially preferred is the mixture that contains the compound of formula VIa, wherein R
61Be alkyl and R
62It is alkenyl.
In addition, liquid crystal compound of the present invention can comprise another optional components, component E, it has negative dielectric anisotropy and comprises the dielectric negativity compound that preferably has formula VII, preferably mainly is made up of described compound, more preferably is made up of it substantially, most preferably form by it fully
Wherein
R
71And R
72Have independently of one another in above-mentioned formula I part R
1The implication that provides,
Be
Or
Be preferably
Z
71And Z
72Be-CH independently of one another
2CH
2-,-COO-, trans-CH=CH-, trans-CF=CF-,-CH
2O-,-CF
2O-or singly-bound, preferably wherein at least one is a singly-bound, most preferably two are singly-bound,
L
71And L
72Be C-F or N independently of one another, preferably wherein at least one is C-F, and most preferably two are C-F, and
K is 0 or 1.
Can be used as chiral component, component F, the chipal compounds that is used for this chiral component in other words is well known to a person skilled in the art.This compounds is known chiral dopant, for example cholesteryl nonanoate (CN) C15 or CB15, and it can be available from Merck KGaA.Same available is following chiral dopant, for example R-811 and S-811, and R-1011 and S-1011 or R-5011 and S-5011, they are paired enantiomer compounds, they also can be available from MerckKGaA.The latter allows by using suitable compound enantiomer to select the required torsional direction of courage steroid spiral.
Preferably, liquid crystal media of the present invention comprises component A to F, particularly is selected from the compound of formula I to VII compound, and preferred main described compound is formed, and most preferably is made up of it fully.
" comprise " and be meant in this application, in Composition Aspects, described entity, for example to contain total concn be preferred 10% or more for medium or component, most preferably 20% or more relevant described one or more components or one or more compounds.
" mainly by ... form ", in this regard, be meant that described entity contains 55% or more, preferred 60% or more, most preferably 70% or more relevant described one or more components or one or more compounds.
" substantially by ... form ", in this regard, be meant that described entity contains 80% or more, preferred 90% or more, most preferably 95% or more relevant described one or more components or one or more compounds.
" fully by ... form ", in this regard, be meant that described entity contains 98% or more, preferred 99% or more, 100.0% relevant described one or more components or one or more compounds most preferably.
Especially preferred is that wherein component A comprises the compound that is selected from formula I to III compound, preferably mainly is made up of described compound, most preferably the liquid crystal media of being made up of described compound fully.
Component E preferably comprises one or more compounds that is preferably selected from the formula VII of formula VIIa to VIIc compound, preferably mainly is made up of described compound, most preferably is made up of it fully
Wherein
R
71And R
72Has the implication separately that in above-mentioned formula VII part, provides.
In formula VIIa to VIIc, R
71Be preferably positive alkyl or 1-E-alkenyl and R
72Be preferably positive alkyl or alkoxyl group.
In medium of the present invention, also can choose wantonly and use valuably and above not have specifically mentioned other mesomorphic (mesogenic) compound.This compounds is well known by persons skilled in the art.
Component A is preferably with 40 to 90% of total mixture, and more preferably 50 to 80%, more preferably 55 to 70%, most preferably 60 to 65% concentration is used.
B component is preferably with 5% to 50% of total mixture, and more preferably 7% to 40%, more preferably 10% to 30%, most preferably 15% to 25% concentration is used.
Component C is preferably with 0% to 40% of total mixture, and more preferably 2% to 30%, more preferably 3% to 20%, most preferably 5% to 15% concentration is used.
Component D is preferably with 0% to 40% of total mixture, and is preferred 0% to 20%, and most preferably 5% to 15% concentration is used.
Component E is preferably with 0% to 30% of total mixture, and is preferred 0% to 20%, and most preferably 5% to 15% concentration is used.
Component F is preferably with 0 to 10% of total mixture, and is preferred 0 to 5%, and most preferably 0.5% to 2% concentration is used.
Randomly, medium of the present invention can comprise other liquid crystalline cpd to regulate physicals.This compounds is well known by persons skilled in the art.Their concentration in medium of the present invention is preferably 0% to 30%, and more preferably 0% to 20%, most preferably 5% to 15%.
Preferably, liquid crystal media contains 50% to 100%, more preferably 70% to 100%, most preferably 80% to 100%, the total amount of 90% to 100% component A, B, C, D, E and F particularly, the total amount of preferred ingredient A, B, C, D and F, described component contain the compound of one or more formulas I, II, III (component A), IV (B component), V (component C), VI (component D) and VII (component E) again respectively, preferably mainly form, most preferably form by it fully by described compound.
Liquid crystal media preferred feature of the present invention is 70 ℃ or higher, preferred 75 ℃ or higher, and more preferably 80 ℃ or higher, particularly 85 ℃ or higher clearing point.
The Δ n of liquid crystal media of the present invention is preferably 0.11 or bigger, and more preferably 0.12 or bigger, more preferably 0.120 to 0.200, more preferably 0.120 to 0.180, most preferably 0.120 to 0.126, particularly 0.120 to 0.150.
The Δ ε of liquid crystal media of the present invention under 1kHz and 20 ℃ is preferably 25.0 or bigger, and more preferably 35.0 or bigger, more preferably 45 or bigger, most preferably 55.0 or bigger, particularly 65.0 or bigger.
Preferably, the nematic phase of medium of the present invention extends to 70 ℃ from 0 ℃ at least, more preferably extend to 70 ℃ from-20 ℃ at least, most preferably extend to 75 ℃ from-30 ℃ at least, particularly extend to 80 ℃ from-40 ℃ at least, " at least " of wherein relevant with lower limit use is meant, the temperature of phase scope extends downward this lower limit at least, preferably extend to the temperature that is lower than this lower limit, and during relevant use with the upper limit, its temperature that is meant the phase scope extends upwardly to this upper limit at least, and preferably extends to the temperature that is higher than this upper limit.
Liquid crystal media of the present invention preferably has 0.11 or bigger, more preferably 0.12 or bigger, more preferably 0.120 to 0.200, more preferably 0.120 to 0.180, most preferably 0.120 to 0.126,0.120 to 0.150 the threshold voltage (V in stn liquid crystal box (cell) particularly
10).
In this application, term " dielectric positivity " is meant the compound or the component of Δ ε＞3.0, " dielectric neutrality " be meant-compound or the component of 1.5≤Δ ε≤3.0, and " dielectric negativity " is meant the compound or the component of Δ ε＜-1.5, Δ ε measures down 1kHz and 20 ℃.The dielectric anisotropy of each compound is measured by the result of 10% the solution of individualized compound in nematic main body mixture.Have the vertical plane orientation and having along the electric capacity of measuring these test mixtures in the liquid crystal cell of face orientation.The cel-gap of this two classes liquid crystal cell is approximately 10 microns.The voltage that applies is the square wave that frequency 1kHz and root-mean-square value are generally 0.5V to 1.0V, and still, it always is chosen as the capacitance threshold value that is lower than corresponding test mixture.
For the dielectric positive compounds, use mixture ZLI-4792 as the main body mixture, for dielectric neutrality and for dielectric negativity compound, use mixture ZLI-3086 as the main body mixture, both all derive from Merck KGaA, Germany.The specific inductivity of these compounds is measured by the variation of the analog value of main body mixture when adding related compound, and is extrapolated to 100% related compound concentration.Have nematic component and measure under such condition under 20 ℃ measurement temperature, all other conditions are handled as compound.
If do not spell out in addition, term " threshold voltage " is meant optical threshold in this application, and to 10% relative contrast (V
10) provide, term " saturation voltage " is meant that optics is saturated, and to 90% relative contrast (V
90) provide.Capacitance threshold value voltage (V
0, be also referred to as Freedericksz-threshold value V
Fr) only when clearly mentioning, just use.
The scope of the parameter that provides among the application includes ultimate value, unless spell out separately.
The application in the whole text in, unless spell out separately, all concentration all provide with mass percent, and relate to corresponding complete mixture, all temperature all in degree centigrade (℃) provide, and all temperature heads are all ℃ to provide.Unless spell out separately, all physicalies or at this according to " Merck Liquid Crystals; Physical Properties ofLiquid Crystals (Merck liquid crystal; the physicals of liquid crystal) ", in November, 1997 state (Status), Merck KGaA, Germany measures, and provides for 20 ℃ of temperature.Optical anisotropy (Δ n) is measured under 589.3 nano wave lengths.Dielectric anisotropy (Δ ε) is measured under 1 kHz frequency.Threshold voltage and all other electrooptics performances are all used MerckKGaA, and the test liquid crystal cell of Germany's preparation is measured.The test liquid crystal cell that is used to measure Δ ε has 22 microns cel-gap.Electrode is 1.13 square centimeters of areas and the circular ITO electrode that has retaining ring.For homeotropic alignment (ε ||), oriented layer is a Yelkin TTS, and for along face orientation (ε ⊥), oriented layer is the polyimide AL-1054 that derives from Japan Synthetic Rubber.Working voltage is 0.3V
RmsSine wave, adopt frequency response analyzer Solatron 1260 to measure electric capacity.Used light was white light during electrooptics was measured.Equipment therefor is Otsuka, the commercially available equipment of Japan.Under right-angle view, measure character voltage.Respectively 10%, 50% and 90% relative contrast is measured threshold value (V
10)-middle gray scale (V
50)-and saturated (V
90) voltage.
Liquid crystal media of the present invention can contain other additive and chiral dopant with typical concentrations.The total concn of these other compositions is based on 0% to 10% of total mixture meter, preferred 0.1% to 6%.Used single compound concentrations is preferably 0.1% to 3%.The concentration of these and similar additive is not counted in the liquid crystal components and compound concentrations value and scope of liquid crystal media among the application.
Liquid crystal media of the present invention is by several compounds, and preferred 3 to 30 kinds, more preferably 8 to 20 kinds, most preferably 10 to 16 kinds of compounds are formed.These compounds mix in a usual manner.Usually, with aequum with the compound dissolution that uses in a small amount in compound with relatively large use.Be higher than in temperature under the situation of clearing point of the compound that uses with higher concentration, observe finishing of dissolution process especially easily.But, can also prepare medium by other usual manner, for example use so-called premixture, it can for example be the homology or the eutectic mixture of compound, or using so-called many bottle systems (multi-bottle-systems), its composition can use mixture itself.
By adding suitable additive, liquid crystal media of the present invention can modification so that they can be used in the liquid-crystal display of all known types, described indicating meter uses liquid crystal media itself, as TN-, TN-AMD, ECB-AMD, VAN-AMD, IPS and OCB LCD, and can be used in the compound system especially, as PDLC, NCAP, PN LCD, and especially in ASM-PA LCD.
The fusing point T of liquid crystal (C, N), from the transformation T of smectic (S) Xiang Xianglie (N) phase (S, N) and clearing point T (N is I) ℃ to provide.
In this application, especially in the following example, the structure of liquid crystalline cpd is also referred to as acronym and represents with abbreviation.According to following two Table As and B, described abbreviation is straightforward clear to the conversion of corresponding construction.All group C
nH
2n+1And C
mH
2m+1It is the straight chained alkyl that has n and m carbon atom respectively.The explanation of table B is self-explantory.Table A is only listed the abbreviation of the nuclear of described structure.Individualized compound is connected to hyphen and the following substituent R that specifies with the abbreviation back of described nuclear
1, R
2, L
1And L
2Coded representation:
| R 1，R 2，L 1， L 2Coding | R 1 | R 2 | L 1 | L 2 |
| nm nom nO.m n nN.F nN.F.F nF nF.F nF.F.F nOF nCl nCl.F nCl.F.F nCF 3 nCF 3.F nCF 3.F.F nOCF 3 nOCF 3.F nOCF 3.F.F nOCF 2 nOCF 2.F nOCF 2.F.F nS nS.F nS.F.F rVsN rEsN nAm | C nH 2n+1 C nH 2n+1 OC nH 2n+1 C nH 2n+1 C nH 2n+1 C nH 2n+1 C nH 2n+1 C nH 2n+1 C nH 2n+1 OC nH 2n+1 C nH 2n+1 C nH 2n+1 C nH 2n+1 C nH 2n+1 C nH 2n+1 C nH 2n+1 C nH 2n+1 C nH 2n+1 C nH 2n+1 C nH 2n+1 C nH 2n+1 C nH 2n+1 C nH 2n+1 C nH 2n+1 C nH 2n+1 C rH 2r+1-CH＝CH-C sH 2s- C rH 2r+1-O-C sH 2s- C nH 2n+1 | C mH2 m+1 OC mH 2m+1 C mH 2m+1 CN CN CN F F F F Cl Cl Cl CF 3 CF 3 CF 3 OCF 3 OCF 3 OCF 3 OCHF 2 OCHF 2 OCHF 2 NCS NCS NCS CN CN COOC mH 2m+1 | H H H H H F H H F H H H F H H F H H F H H F H H F H H H | H H H H F F H F F H H F F H F F H F F H F F H F F H H H |
Table A:
Liquid crystal media of the present invention preferably contains
-seven kinds or more kinds of, preferred eight kinds or more kinds of compound that is selected from the compound of Table A and B, the preferred not compound of cotype, and/or
-one or more, more preferably two or more, preferred three kinds or more kinds of compound that is selected from the compound of Table A, the preferred not compound of cotype, and/or
-three kinds or more kinds of, more preferably four kinds or more kinds of, more preferably five kinds or more kinds of compound of compound that is selected from table B, the preferred not compound of cotype.
In following table, among the table C, show the example that is used as the chipal compounds of the chiral dopant in the liquid crystal media of the present invention usually.
Table C
In following table, among the table D, show the examples for compounds that is used as the stablizer in the liquid crystal media of the present invention usually.
Table D
Embodiment
Embodiment
Embodiment given below illustrates the present invention but not limits the present invention by any way.
But described combination of physical properties thing illustrates to those skilled in the art can realize which performance and they can change in what kind of scope.Particularly, therefore the combination of the various performances that preferably can realize is clear and definite to those skilled in the art.
Embodiment 1
Liquid crystal compound adopts composition given in the following table and performance to realize.
| Form | Physicals | ||
| Compound | T (N, I)=82 ℃ Δ n (20 ℃, 589.3nm)=0.1461 Δ ε (20 ℃ 1kHz)=67.7 are reversed=240 ° of frequency=80Hz V 10＝0.75V V 90/V 10＝1.178 | ||
| Numbering | Abbreviation | Concentration/% | |
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 ∑ | PZU-V2-N ME-2N.F ME-3N.F ME-4N.F ME-5N.F HP-3N.F HP-4N.F CCP-30CF3.F CCP-3F.F.F CCP-5F.F.F CDU-3-F CDU-5-F CCGU-3-F CCPC-33 CCPC-34 CCPC-35 | 13.0 9.0 9.0 12.0 12.0 4.0 3.0 2.0 4.0 4.0 4.0 4.0 10.0 4.0 3.0 3.0 100.0 | |
This mixture has favourable Δ n value and high Δ ε value, and is very suitable for the indicating meter with the work of STN pattern.
Embodiment 2
Liquid crystal compound adopts composition given in the following table and performance to realize.
| Form | Physicals | ||
| Compound | T (N, I)=77 ℃ Δ n (20 ℃, 589.3nm)=0.1294 Δ ε (20 ℃ 1kHz)=43.9 are reversed=240 ° of frequency=80Hz V 10＝0.76V V 90/V 10＝1.147 | ||
| Numbering | Abbreviation | Concentration/% | |
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 ∑ | PZU-2V-N PCH-3N.F.F ME-2N.F ME-3N.F ME-4N.F HP-3N.F HP-4N.F HP-5N.F CDU-3-F CCZU-2-F CCZU-3-F CCZU-5-F CCGU-3-F CCPC-34 CCPC-35 | 5.0 14.0 9.0 9.0 11.0 5.0 5.0 5.0 4.0 5.0 10.0 5.0 6.0 3.0 3.0 100.0 | |
This mixture has favourable Δ n value and high Δ ε value, and is very suitable for the indicating meter with the work of STN pattern.
Claims (10)
1. liquid crystal media is characterized in that it comprises:
-the first dielectric positivity component, component A, the compound that this component comprises one or more formulas I is selected from the compound of formula II and III with one or more
Wherein
R
1, R
2And R
3For to have alkyl, alkoxyl group, the fluorinated alkyl of 1 to 7 carbon atom or to fluoridize alkoxyl group, have alkenyl, alkenyloxy, the alkoxyalkyl of 2 to 7 carbon atoms or fluoridize alkenyl independently of one another, and
M is 0 or 1
With
-the second dielectric positivity component, B component, this component comprises the compound of one or more formulas IV
Wherein
R
4Have in formula I I part R
2The implication that provides,
Z
4Be-CO-O-or singly-bound,
X
4Be F or OCF
3And
Y
4Be H or F.
2. according to the liquid crystal media of claim 1, it is characterized in that it comprises dielectric positivity component A, this component comprises one or more wherein R
1Compound for the formula I of alkenyl.
3. according to each liquid crystal media in claim 1 and 2, it is characterized in that it comprises the 3rd dielectric positivity component, component C, this component comprises one or more compounds as the formula V that provides in the specification sheets text.
4. according to one or multinomial liquid crystal media in the claim 1 to 3, it is characterized in that it comprises the dielectric neutral component, component D, this component comprises one or more compounds as the formula VI that provides in the specification sheets text.
5. according to one or multinomial liquid crystal media in the claim 1 to 4, it is characterized in that it comprises dielectric negativity component, component E, this component comprises one or more compounds as the formula VII that provides in the specification sheets text.
6. according to one or multinomial liquid crystal media in the claim 1 to 5, it is characterized in that it comprises the compound of the formula IV of one or more compounds that are selected from formula IVa to IVd
R wherein
4Has the implication that provides in the claim 1.
7. according to one or multinomial liquid crystal media in the claim 1 to 6, it is characterized in that it comprises one or more compounds as the formula III that provides in the claim 1.
8. liquid-crystal display is characterized in that it comprises according to each liquid crystal media in the claim 1 to 7.
9. liquid-crystal display according to Claim 8 is characterized in that it is the STN indicating meter.
10. according to each the purposes of liquid crystal media in liquid-crystal display in the claim 1 to 7.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP06025094 | 2006-12-05 | ||
| EP06025094.1 | 2006-12-05 |
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|---|---|---|---|
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|---|---|
| JP (1) | JP2008144167A (en) |
| KR (1) | KR101516814B1 (en) |
| CN (1) | CN101195748B (en) |
| TW (1) | TWI546368B (en) |
Cited By (1)
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|---|---|---|---|---|
| CN103351881A (en) * | 2013-06-18 | 2013-10-16 | 江苏和成显示科技股份有限公司 | Low dielectric frequency dependent liquid crystal composition and PM displayer containing the same |
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|---|---|---|---|---|
| KR20120058901A (en) * | 2010-11-30 | 2012-06-08 | 주식회사 동진쎄미켐 | Fast Response Bimesogenic Compound with Adjusted Dielectric Anisotropy of Both Side Mesogenic Groups |
| CN102732260B (en) * | 2012-04-26 | 2014-01-15 | 北京八亿时空液晶科技股份有限公司 | Super-twisted nematic liquid crystal composition |
| JP6811553B2 (en) * | 2015-06-18 | 2021-01-13 | フォトン・ダイナミクス・インコーポレーテッド | High resolution, high speed switching electro-optic modulator for TFT inspection |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19748618B4 (en) * | 1996-12-05 | 2009-12-03 | Merck Patent Gmbh | Liquid crystal mixture and its use in an electro-optical liquid crystal display |
| DE19707807A1 (en) * | 1997-02-27 | 1998-09-03 | Merck Patent Gmbh | Electro-optical liquid crystal display |
| DE19950194A1 (en) * | 1998-10-20 | 2000-05-18 | Merck Patent Gmbh | In Plane Switching electrooptical liquid crystal displays with low threshold voltage and low temperature stability have positive dielectric anisotropy medium containing bis-cyclohexylene compounds |
| DE10004636A1 (en) * | 1999-02-16 | 2000-08-17 | Merck Patent Gmbh | Liquid crystal medium for electro-optical use contains compounds with two ethylene- or butylene-linked cyclohexane rings attached to a fluorinated 4-trifluoro-methoxyphenyl group, optionally by a connecting group |
| JP5236140B2 (en) * | 2000-02-28 | 2013-07-17 | メルク パテント ゲゼルシャフト ミット ベシュレンクテル ハフツング | Super twisted nematic liquid crystal display, liquid crystal composition and compound |
| DE10111139A1 (en) * | 2000-04-07 | 2001-10-11 | Merck Patent Gmbh | Electro-optical liquid crystal display with orientation reversal layer, useful for in-plane switching displays, having liquid crystal medium containing 4-cyclohexyl-cyclohexane-1-carboxylic acid ester derivative |
| DE10111142A1 (en) * | 2000-04-07 | 2001-10-11 | Merck Patent Gmbh | Electro-optical liquid crystal display with orientation reversal layer, useful for in-plane switching displays, having liquid crystal medium containing mesogenic 2-cyano-5-phenyl-pyrimidine derivative |
| DE10116400A1 (en) * | 2000-04-28 | 2001-12-06 | Merck Patent Gmbh | Liquid crystal medium containing compounds with strongly positive dielectric anisotropy, useful in electro-optical display devices |
| JP5367203B2 (en) * | 2000-11-29 | 2013-12-11 | メルク パテント ゲゼルシャフト ミット ベシュレンクテル ハフツング | Electro-optical liquid crystal display and liquid crystal medium |
| KR20040010230A (en) * | 2002-07-18 | 2004-01-31 | 메르크 파텐트 게엠베하 | Liquid crystalline medium and liquid crystal display |
| KR20040045373A (en) * | 2002-11-25 | 2004-06-01 | 메르크 파텐트 게엠베하 | Liquid crystalline medium and liquid crystal display |
| EP1570025B1 (en) * | 2002-12-11 | 2007-04-11 | MERCK PATENT GmbH | Liquid crystal composition for use in bistable liquid crystal devices |
| JP2004339483A (en) * | 2003-03-14 | 2004-12-02 | Merck Patent Gmbh | Liquid crystal medium |
-
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|---|---|---|---|---|
| CN103351881A (en) * | 2013-06-18 | 2013-10-16 | 江苏和成显示科技股份有限公司 | Low dielectric frequency dependent liquid crystal composition and PM displayer containing the same |
| CN103351881B (en) * | 2013-06-18 | 2015-10-21 | 江苏和成显示科技股份有限公司 | Low dielectric frequency dependence liquid-crystal composition and comprise the PM indicating meter of said composition |
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| Publication number | Publication date |
|---|---|
| KR101516814B1 (en) | 2015-04-30 |
| TWI546368B (en) | 2016-08-21 |
| JP2008144167A (en) | 2008-06-26 |
| KR20080052416A (en) | 2008-06-11 |
| TW200838987A (en) | 2008-10-01 |
| CN101195748B (en) | 2014-02-26 |
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