CN100430457C - Nematic liquid-crystal composition and liquid-crystal display element employing the same - Google Patents
Nematic liquid-crystal composition and liquid-crystal display element employing the same Download PDFInfo
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- CN100430457C CN100430457C CNB2003801072350A CN200380107235A CN100430457C CN 100430457 C CN100430457 C CN 100430457C CN B2003801072350 A CNB2003801072350 A CN B2003801072350A CN 200380107235 A CN200380107235 A CN 200380107235A CN 100430457 C CN100430457 C CN 100430457C
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Abstract
The present invention provides a nematic liquid-crystal composition having negative dielectric anisotropy which contains 10 to 70 wt.% at least one compound selected among the compounds represented by the formulae (IA) and (IB) and 10 to 70 wt.% at least one compound selected among the compounds represented by the formulae (IIA) to (IID), the total content of the compounds represented by the formulae (IA) to (IID) being 35 to 80 wt.%, and further contains 20 to 65 wt.% compound represented by the formula (III).
Description
Technical field
The present invention relates to have all rerum naturas and the liquid crystal display device that have the anisotropic nematic liquid crystal composition of negative dielectric constant and use said composition that is suitable for liquid crystal display device most.
Background technology
Just widely used at present TN (twisted nematic) type liquid crystal display device or STN (super-twist nematic) type liquid crystal display device, cause because of its visual angle and to change aspect the electrooptics characteristic, and have the problem of viewing angle characteristic difference, in the important purposes of viewing angle characteristics such as TV, become big problem.As the method that obtains bigger visual angle, proposition has VA (Vertically aligned) mode (VA pattern) (with reference to non-patent literature 1), IPS (In-Plane Switching) mode (IPS pattern) (with reference to non-patent literature 2), ECB (electrically controlled birefringence) mode (ecb mode) etc., has carried out practicability.The liquid crystal material that in VA-LCD (Vertically Aligned LiquidCrystal Display), uses must be the dielectric constant anisotropy different with TN type, STN type for negative liquid crystal material (with reference to patent documentation 1), need have characteristic as follows.1, speed of answer fast, 2, high nematic phase-isotropy liquid phase transition temperature (T
N-I), 3, low driving voltage, promptly the driving voltage to needs has fast as far as possible responsiveness, requires to have more stable demonstration in wideer temperature range.In addition, this demand was also paid close attention to when the change of the electrostatic capacitance of TFT element was less than liquid crystal drive, under the situation of identical driving voltage, require to demonstrate the liquid crystal of little negative dielectric constant anisotropy of absolute value or more precipitous electrooptics characteristic.And then, require to have higher nematic phase-isotropy liquid phase alternating temperature degree (T
N-I) and lower viscosity and liquid-crystal composition that can low voltage drive.
At above-mentioned problem, using following to have 2, the liquid crystal material of 3-difluorophenyl (with reference to patent documentation 2 to 7).
(in the formula, R and R ' expression alkyl or alkoxyl group.)
But for the compound with general formula (a) expression, its negative anisotropic absolute value of dielectric constant is bigger, but problem is to use the liquid-crystal composition of this compound to make nematic phase-isotropy liquid phase transition temperature (T in a large number
N-I) reduce.In addition, used with general formula (b) although the compound liquid-crystal composition of expression has than higher nematic phase-isotropy liquid phase transition temperature (T
N-I), but it also has the little problem of the anisotropic absolute value of negative dielectric constant.
On the other hand, known have 1,7,8-trifluoro naphthyl-2, and the liquid crystalline cpd of 6-two bases (with reference to patent documentation 8) also is negative nematic liquid crystal composition be applied (with reference to patent documentation 9 and 10) in the dielectric constant anisotropy.But, have 1,7 having used, which kind of compound 8-trifluoro naphthyl-2 in the liquid-crystal composition of the compound of 6-two bases, specifically uses constitute composition and just can finish the not concrete record of above-mentioned problem.In addition, the characteristic as this compound monomer is characterized in that, the negative anisotropic absolute value of dielectric constant is bigger, nematic phase-isotropy liquid phase transition temperature (T
N-I) also high, but that its problem points is viscosity is higher relatively, has used the speed of answer of liquid crystal display device of this compound unhappy.
As mentioned above, provide negative big, the nematic phase-isotropy liquid phase transition temperature (T of the anisotropic absolute value of dielectric constant
N-I) the low liquid-crystal composition of height and viscosity and being not easy, the liquid-crystal composition with excellent characteristic is developed in expectation.
Patent documentation 1: the spy opens flat 11-242225 communique (1 page)
Patent documentation 2: the spy opens flat 8-104869 communique (2 pages)
Patent documentation 3: the spy opens flat 10-176167 communique (2 pages)
Patent documentation 4: the spy opens flat 11-140447 communique (2 pages)
Patent documentation 5: the spy opens 2001-192657 communique (2 pages)
Patent documentation 6: the spy opens 2001-316669 communique (2 pages)
Patent documentation 7: the spy opens 2002-201474 communique (2 pages)
Patent documentation 8: German patent application discloses No. 19522195 specification sheets (2 pages)
Patent documentation 9: the spy opens 2001-40354 communique (2 pages)
Patent documentation 10: the spy opens 2002-69449 communique (2 pages)
Non-patent literature: big chamber etc., Society of Information Display (SID) summary, Society of Information Display (SID), 1997 years, p845-848
Non-patent literature 2: field etc. too, Asia Display Summary, Society of Information Display (SID), nineteen ninety-five, p707-710
Summary of the invention
The objective of the invention is to, provide a kind of and have the bigger negative dielectric constant anisotropy of the absolute value that can carry out low voltage drive and have liquid crystal temperature range and low viscosity widely and have the anisotropic nematic phase liquid crystal composition of negative dielectric constant and use the liquid crystal display device of said composition.
The present invention is in order to address the above problem, nematic liquid crystal composition with following characteristics and the liquid crystal display device that uses this liquid-crystal composition are provided, described nematic liquid crystal composition is characterised in that, contain at least a compound of from compound group, selecting, and its total content is 10～70 quality % by general formula (IA) and general formula (IB) expression; Contain at least a compound of selecting from the compound group by general formula (IIA), general formula (IIB), general formula (IIC) and general formula (IID) expression, its total content is 10～70 quality %; The total content of the compound of selecting from the compound group by general formula (IA), general formula (IB), general formula (IIA), general formula (IIB), general formula (IIC) and general formula (IID) expression is 35～80 quality %, the compound that contains 20～65 quality % in addition by general formula (III) expression
(in the formula, R
1To R
14Separate, the expression carbonatoms is that 1～10 alkyl, carbonatoms are that 1～10 alkoxyl group, carbonatoms are that 2～10 alkenyl or carbonatoms are 2～10 alkenyloxy, the CH more than 1 that exists in this alkyl, this alkoxyl group, this alkenyl or this alkenyloxy
2Base, as O atom bonded group not mutually directly, can by-O-,-CO-or-COO-replaces,
Z
1To Z
6And Z
9To Z
11Separate, the expression singly-bound ,-CH
2CH
2-,-CH=CH-,-CH
2CH
2CH
2CH
2-,-CH
2CH
2CH
2O-,-OCH
2CH
2CH
2-,-CH=CHCH
2CH
2-,-CH
2CH
2CH=CH-,-C ≡ C-,-CH
2O-,-OCH
2-,-CF
2O-,-COO-or-OCO-, Z
7And Z
8Separate, the expression singly-bound ,-CH
2CH
2-,-CH=CH-,-CH
2CH
2CH
2CH
2-,-CH
2CH
2CH
2O-,-OCH
2CH
2CH
2-,-CH=CHCH
2CH
2-,-CH
2CH
2CH=CH-,-C ≡ C-,-CH
2O-or-OCH
2-;
L and m represent 0 or 1;
A represents instead-1,4-ring caproic subunit or 1,4-phenylene;
B, C and D are separate, and expression is anti--1,4-ring caproic subunit, 1,4-phenylene or anti-form-1,4-phenylidene.) the dielectric constant anisotropy in-12～-3 scope, nematic phase-isotropy liquid phase transition temperature (T
N-I) in 80 ℃～120 ℃ scope, viscosity is below the 45mPas.
Liquid-crystal composition of the present invention has the big negative dielectric constant anisotropy of absolute value, liquid crystal temperature range and low viscosity widely, thereby used the speed of answer of the display element of this liquid-crystal composition also can under low voltage, drive soon, so in the liquid crystal display device that needs the dielectric constant anisotropy for negative liquid-crystal composition, be useful.
Description of drawings
Fig. 1 is the figure that the section to the liquid crystal indicator of expression VA pattern display characteristic describes.
Fig. 2 is the figure that expression describes the transparency electrode that is provided with the slit with zig-zag bending pattern.
Fig. 3 is the figure that expression describes the slit with zig-zag bending pattern.(unit: μ m)
Embodiment
The nematic liquid crystal composition that obtains in the present invention has with the big negative dielectric constant anisotropy of absolute value, liquid crystal temperature range, low viscosity are the characteristic of feature widely.In addition, to desirable driving voltage, have voltage retention with excellence, excellent chemical physical stability is the characteristic of feature.And then so the abruptness excellence is can low voltage drive.
In compound with general formula (IA) and general formula (IB) expression, R
1To R
4The preferred carbonatoms of representing independently of each other is that 1～5 alkyl or carbonatoms are 2～5 alkenyl, as the special preferred vinyl of alkenyl, 1-propenyl, 3-butenyl.
R
1To R
4Preferred expression carbonatoms is that 1～5 alkyl or carbonatoms are 2～5 alkenyl.
Z
1To Z
2Preferably represent independently of each other singly-bound ,-CH
2CH
2-,-CH=CH-and-C ≡ C-, more preferably represent singly-bound or-CH
2CH
2-.
With the concrete preferred compound of representing to general formula (IB-4) with following general formula (IA-1) to general formula (IA-4) and general formula (IB-1) of the compound of general formula (IA) and general formula (IB) expression.
(in the formula, R
1And R
3The expression carbonatoms is that 1～10 alkyl, carbonatoms are that 1～10 alkoxyl group, carbonatoms are that 2～10 alkenyl or carbonatoms are 2～10 alkenyloxy, the CH more than 1 that exists in this alkyl, this alkoxyl group, this alkenyl or this alkenyloxy
2Base, as O atom bonded group not mutually directly, can by-O-,-CO-or-COO-replaces;
Preferred expression carbonatoms is that 1～5 alkyl or carbonatoms are 2～5 alkenyl, as the special preferred vinyl of alkenyl, 1-propenyl, 3-butenyl;
R
15The expression carbonatoms is that 1～10 alkyl or carbonatoms are 2～10 alkenyl.)
With the compound of general formula (IA-1) expression, have big negative dielectric constant anisotropy and the high nematic phase-isotropy liquid phase transition temperature (T of absolute value to general formula (IA-4) and general formula (IB-1) to general formula (IB-4)
N-I), but requiring under the situation of low voltage drive especially, preferably have the anisotropic compound of the very large negative dielectric constant of absolute value with general formula (IA-2), general formula (IA-4), general formula (IB-2) or general formula (IB-4) expression.
In the compound of representing to general formula (IA-4) and general formula (IB-1) to general formula (IB-4) with general formula (IA-1),
R
1And R
3Preferred expression carbonatoms is that 1～5 alkyl or carbonatoms are 2～5 alkenyl, as the special preferred vinyl of alkenyl, 1-propenyl, 3-butenyl;
R
15Preferred expression carbonatoms is that 1～5 alkyl or carbonatoms are 2～5 alkenyl, as the special preferred vinyl of alkenyl, 1-propenyl, 3-butenyl.
In compound with general formula (IIA) and general formula (IIB) expression, R
5To R
8The preferred carbonatoms of representing independently of each other is that 1～5 alkyl or carbonatoms are 2～5 alkenyl, as the special preferred vinyl of alkenyl, 1-propenyl, 3-butenyl.
Z
3To Z
6Preferably represent independently of each other singly-bound ,-CH
2CH
2-,-CH=CH-or-C ≡ C-, more preferably represent singly-bound ,-CH
2CH
2-.
With the concrete preferred compound of representing to general formula (IIB-6) with following general formula (IIA-1) to general formula (HA-6) and general formula (IIB-1) of the compound of general formula (IIA) and general formula (IIB) expression.
(in the formula, R
5And R
7The expression carbonatoms is that 1～10 alkyl, carbonatoms are that 1～10 alkoxyl group, carbonatoms are that 2～10 alkenyl or carbonatoms are 2～10 alkenyloxy, the CH more than 1 that exists in this alkyl, this alkoxyl group, this alkenyl or this alkenyloxy
2Base, as O atom bonded group not mutually directly, can by-O-,-CO-or-COO-replaces; Preferred expression carbonatoms is that 1～5 alkyl or carbonatoms are 2～5 alkenyl, as the special preferred vinyl of alkenyl, 1-propenyl, 3-butenyl;
R
15The expression carbonatoms is that 1～10 alkyl or carbonatoms are 2～10 alkenyl.)
With the compound of general formula (IIA-1) expression, have big negative dielectric constant anisotropy and the high nematic phase-isotropy liquid phase transition temperature (T of absolute value to general formula (IIA-6) and general formula (IIB-1) to general formula (IIB-6)
N-II), but particularly requiring under the situation of low voltage drive, preferably having the anisotropic compound of the very large negative dielectric constant of absolute value with general formula (IIA-2), general formula (IIA-4), general formula (IIA-6), general formula (IIB-2), general formula (IIB-4) or general formula (IIB-6) expression.
Compound with general formula (IIA-1) expression to general formula (IIA-6) and general formula (IIB-1) to general formula (IIB-6) has rising nematic phase-isotropy liquid phase transition temperature (T
N-I) effect, so can add on a small quantity as 0.1～5 quality %.
In the compound of representing to general formula (IIA-6) and general formula (IIB-1) to general formula (IIB-6) with general formula (IIA-1), R
5And R
7The expression carbonatoms is that 1～10 alkyl, carbonatoms are that 1～10 alkoxyl group, carbonatoms are that 2～10 alkenyl or carbonatoms are 2～10 alkenyloxy, the CH more than 1 that exists in this alkyl, this alkoxyl group, this alkenyl or this alkenyloxy
2Base, as the mutually not direct bonded group of O atom, can by-O-,-CO-or-COO-replaces, and represents that preferably carbonatoms is that 1～5 alkyl or carbonatoms are 2～5 alkenyl, as the special preferred vinyl of alkenyl, 1-propenyl, 3-butenyl; R
15Preferred expression carbonatoms is that 1～5 alkyl or carbonatoms are 2～5 alkenyl, as the special preferred vinyl of alkenyl, 1-propenyl, 3-butenyl.
In compound with general formula (IIC) expression, R
9To R
10The preferred carbonatoms of representing independently of each other is that 1～5 alkyl or carbonatoms are 2～5 alkenyl, as the special preferred vinyl of alkenyl, 1-propenyl, 3-butenyl.
Z
7To Z
8Preferably represent independently of each other singly-bound ,-CH
2CH
2-,-CH=CH-and-C ≡ C-, more preferably represent singly-bound ,-CH
2CH
2-.
Concrete with the compound of general formula (IIC) expression preferably with the compound of following general formula (IIC-1) to general formula (IIC-10) expression.
(in the formula, R
9The expression carbonatoms is that 1～10 alkyl, carbonatoms are that 1～10 alkoxyl group, carbonatoms are that 2～10 alkenyl or carbonatoms are 2～10 alkenyloxy, the CH more than 1 that exists in this alkyl, this alkoxyl group, this alkenyl or this alkenyloxy
2Base, as O atom bonded group not mutually directly, can by-O-,-CO-or-COO-replaces; R
15The expression carbonatoms is that 1～10 alkyl or carbonatoms are 2～10 alkenyl.)
In the middle of the compound of representing with general formula (IIC-1) to general formula (IIC-10), compound with general formula (IIC-1), general formula (IIC-2), general formula (IIC-4), general formula (IIC-5), general formula (IIC-6) or general formula (IIC-8) expression, its driving voltage is low and speed of answer is fast, so preferred in this.
In the compound of representing with general formula (IIC-1) to general formula (IIC-10), R
9Preferred expression carbonatoms is that 1～5 alkyl or carbonatoms are 2～5 alkenyl, as the special preferred vinyl of alkenyl, 1-propenyl, 3-butenyl; R
15Preferred expression carbonatoms is that 1～5 alkyl or carbonatoms are 2～5 alkenyl, as the special preferred vinyl of alkenyl, 1-propenyl, 3-butenyl.
In compound with general formula (IID) expression, R
11To R
12The preferred carbonatoms of representing independently of each other is that 1～5 alkyl or carbonatoms are 2～5 alkenyl, as the special preferred vinyl of alkenyl, 1-propenyl, 3-butenyl.
Z
9Preferred expression singly-bound ,-CH
2CH
2-,-CH=CH-and-C ≡ C-, more preferably represent singly-bound ,-CH
2CH
2-.
Concrete with the compound of general formula (IID) expression preferably with the compound of following general formula (IID-1) to general formula (IID-3) expression.
(in the formula, R
11The expression carbonatoms is that 1～10 alkyl, carbonatoms are that 1～10 alkoxyl group, carbonatoms are that 2～10 alkenyl or carbonatoms are 2～10 alkenyloxy, the CH more than 1 that exists in this alkyl, this alkoxyl group, this alkenyl or this alkenyloxy
2Base, as the mutually not direct bonded group of O atom, can by-O-,-CO-or-COO-replaces, and represents that preferably carbonatoms is that 1～5 alkyl or carbonatoms are 2～5 alkenyl, as the special preferred vinyl of alkenyl, 1-propenyl, 3-butenyl; R
15The expression carbonatoms is that 1～10 alkyl or carbonatoms are 2～10 alkenyl.)
With the compound of general formula (IID-1) to general formula (IID-3) expression, preferred its addition is a small amount of aspect its characteristic, preferably adds 0.1～15 quality %, especially preferably adds 0.1～10 quality %.
In compound with general formula (III) expression, R
13To R
14The preferred carbonatoms of representing independently of each other is that 1～5 alkyl or carbonatoms are 2～5 alkenyl, as the special preferred vinyl of alkenyl, 1-propenyl, 3-butenyl.
Z
10To Z
11Preferably represent independently of each other singly-bound ,-CH
2CH
2-,-CH=CH-and-C ≡ C-, more preferably represent singly-bound or-CH
2CH
2-.
Concrete with the compound of general formula (III) expression preferably with the compound of following general formula (III-1) to general formula (III-22) expression.
(in the formula, R
13And R
14Separate, the expression carbonatoms is that 1～10 alkyl, carbonatoms are that 1～10 alkoxyl group, carbonatoms are that 2～10 alkenyl or carbonatoms are 2～10 alkenyloxy, the CH more than 1 that exists in this alkyl, this alkoxyl group, this alkenyl or this alkenyloxy
2Base, as the mutually not direct bonded group of O atom, can by-O-,-CO-or-COO-replaces, and represents independently of each other that preferably carbonatoms is that 1～5 alkyl or carbonatoms are 2～5 alkenyl, as the special preferred vinyl of alkenyl, 1-propenyl, 3-butenyl.)
With the compound of general formula (III-1) to general formula (III-22) expression, has low especially viscosity, improve aspect the high-speed responsive effective at this, wherein, preferably use general formula (III-1), general formula (III-2), general formula (III-3), general formula (III-4), general formula (III-7), general formula (III-11), general formula (III-12), general formula (III-13), general formula (III-14), general formula (III-15), general formula (III-19), the compound of general formula (III-20) or general formula (III-21) expression, further preferred with general formula (III-1), general formula (III-2), general formula (III-4), general formula (III-7), general formula (III-11), general formula (III-12), general formula (III-13), general formula (III-15), general formula (III-19), the compound of general formula (III-20) or general formula (III-21) expression.
(1) situation of attention speed of answer
The total content of the compound of selecting from the compound group with general formula (IA) and general formula (IB) expression is preferably 10～40 quality %, more preferably 15～40 quality %.Total content with the compound of general formula (IIC) expression is preferably 10～40 quality %, more preferably 15～40 quality %.The total content of the compound of selecting from the compound group with general formula (IA), general formula (IB) and general formula (IIC) expression is preferably 45～70 quality %, more preferably 50～70 quality %.
More specifically say, preferably the total content of the compound of selecting from the compound group with general formula (IA) and general formula (IB) expression is 10～40 quality %, content with the compound of general formula (IIC) expression is 10～40 quality %, the total content of the compound of selecting from the compound group with general formula (IA), general formula (IB) and general formula (IIC) expression is 45～70 quality %, in addition, preferably using the content of the compound of general formula (III) expression is 30～55 quality %; More preferably the total content of the compound of selecting from the compound group with general formula (IA) and general formula (IB) expression is 15～40 quality %, content with the compound of general formula (IIC) expression is 15～40 quality %, the total content of the compound of selecting from the compound group with general formula (IA), general formula (IB) and general formula (IIC) expression is 50～70 quality %, in addition, the content with the compound of general formula (III) expression is 30～55 quality %.At this moment, the dielectric constant anisotropy preferably in-6～-3 scope, nematic phase-isotropy liquid phase transition temperature (T
N-I) preferably in 80 ℃～120 ℃ scope, preferably in 0.07～0.15 scope, viscosity is preferably below the 30mPas specific refractory power anisotropy.
In addition, the dielectric constant anisotropy more preferably in-6～-4 scope, nematic phase-isotropy liquid phase transition temperature (T
N-I) more preferably in 90 ℃～120 ℃ scope, the specific refractory power anisotropy is more preferably in 0.07～0.12 scope, in 0.07～0.11 scope.
In addition, under the situation of special attention speed of answer, the total content of the compound of selecting from the compound group with general formula (IA) and general formula (IB) and general formula (IIC) expression is preferably 45～55 quality %, and this moment, viscosity was preferably below the 26mPas.
Liquid-crystal composition of the present invention further has good abruptness, and has the anisotropic liquid-crystal composition in the past of identical dielectric constant and compares, and can carry out work with lower driving voltage.This is as negative very large first composition of the anisotropic absolute value of dielectric constant, the compound of selected general formula (IA) to (IIB), and then cause as the compound that second composition effectively makes up general formula (III).
(2) pay attention to wide nematic phase-isotropy liquid phase transition temperature (T
N-I) situation of scope
The total content of the compound of selecting from the compound group with general formula (IA) and general formula (IB) expression is preferably 25～60 quality %, more preferably 30～60 quality %; The total content of the compound of selecting from the compound group with general formula (IIA) and general formula (IIB) expression is preferably below the 25 quality %; The total content of the compound of selecting from the compound group with general formula (IA), general formula (IB), general formula (IIA) and general formula (IIB) expression is preferably 35～65 quality %.
More specifically say, preferably the total content of the compound of selecting from the compound group with general formula (IA) and general formula (IB) expression is 25～60 quality %, the total content of the compound of selecting from the compound group with general formula (IA), general formula (IB), general formula (IIA) and general formula (IIB) expression is 35～65 quality %, in addition, preferably using the content of the compound of general formula (III) expression is 35～65 quality %.
In addition, under the situation of paying attention to low voltage drive, the total content of the compound of selecting from the compound group with general formula (IA), general formula (IB), general formula (IIA) and general formula (IIB) expression is preferably 50～65 quality %, this moment, the dielectric constant anisotropy was preferably in-6～-5 scope, nematic phase-isotropy liquid phase transition temperature (T
N-I) preferably in 80 ℃～120 ℃ scope, preferably in 0.07～0.15 scope, viscosity is preferably below the 30mPas specific refractory power anisotropy.
Paying attention to wide nematic phase-isotropy liquid phase transition temperature (T
N-I) scope and then pay attention under the situation of speed of answer, the total content of the compound of selecting from the compound group with general formula (IA), general formula (IB), general formula (IIA) and general formula (IIB) expression is preferably 35～50 quality %, preferably using the content of the compound of general formula (III) expression is 50～65 quality %, this moment, the dielectric constant anisotropy was preferably in-5～-3 scope, nematic phase-isotropy liquid phase transition temperature (T
N-I) preferably in 80 ℃～120 ℃ scope, preferably in 0.07～0.15 scope, viscosity is preferably below the 25mPas specific refractory power anisotropy.
(3) pay attention to the situation of low voltage drive especially
Preferably the total content of the compound of selecting from the compound group with general formula (IA), general formula (IB), general formula (IIA) and general formula (IIB) expression is 20～60 quality %, the total content of the compound of selecting from the compound group with general formula (IIC) and general formula (IID) expression is 30～60 quality %, and the total content of the compound of selecting from the compound group with general formula (IA), general formula (IB), general formula (IIA), general formula (IIB), general formula (IIC) and general formula (IID) expression is 70～80 quality %; At this moment, the compound that preferably contains usefulness general formula (IA), general formula (IB), general formula (IIA), general formula (IIB), general formula (IIC) and general formula (IID) expression more than 5 kinds.
In addition, as the composition that appends, the compound that preferably contains useful general formula (III) expression is below the 30 quality %.
This moment, preferable medium constant anisotropy was in-12～-6 scope, nematic phase-isotropy liquid phase transition temperature (T
N-I) in 80 ℃～120 ℃ scope, the specific refractory power anisotropy is in 0.07～0.15 scope, viscosity is below the 45mPas.
And then, more preferably the dielectric constant anisotropy in-12～-9 scope, nematic phase-isotropy liquid phase transition temperature (T
N-I) more preferably in 90 ℃～120 ℃ scope, the specific refractory power anisotropy is more preferably in 0.07～0.12 scope, in 0.07～0.11 scope.
Especially as the preferably combination that can carry out low voltage drive, contain from compound group, select with general formula (IA-2), general formula (IA-4), general formula (IB-2) and general formula (IB-4) expression more than 2 kinds, more preferably the amount of the compound more than 3 kinds is 30～60 quality %, 40～60 quality % more preferably, and the total amount that contains the compound of selecting from the compound group with general formula (IIA-2), general formula (IIA-4), general formula (IIA-6), general formula (IIB-2), general formula (IIB-4) and general formula (IIB-6) expression is below the 25 quality %.
Liquid-crystal composition of the present invention further has good abruptness, and has the anisotropic liquid-crystal composition in the past of identical dielectric constant and compares, and can carry out work with lower driving voltage.This is the compound of selected negative very large first composition of the anisotropic absolute value of dielectric constant, and then effectively makes up second composition and the effect that produces.(γ=Vsat/Vth) be preferably below 2.2 is more preferably below 2.0 for abruptness.
Liquid crystal display device of the present invention is preferably used as active matrix liquid crystal display device especially, as display format, in order to obtain wideer visual angle, preferred VA (Vertically aligned) pattern, IPS (In-Plane Switching) pattern, ECB (electrically controlled birefringence) pattern.
Below, the present invention will be described in more detail to enumerate embodiment, but the present invention is not limited to these embodiment.In addition, " % " in the middle of the composition of the following examples and comparative example is meant " quality % ".The liquid crystal indicator that demonstrates VA pattern display characteristic is (with reference to the Fig. 1) that makes by method as follows.The transparency electrode 2 of having one's face covered with is set on an opposed side's glass substrate 1, form vertical alignment layer 3 (JSR Corp.'s system thereon, trade(brand)name JALS-204), as shown in Figure 2, the interval that transparency electrode on opposed the opposing party's glass substrate 6 becomes with 50 μ m is provided with 10 μ m crenellation pattern 5 wide slit, that have zigzag bending pattern, form vertical alignment layer (JSR Corp.'s system thereon with reference to (Fig. 3), trade(brand)name JALS-204), overlapping two glass substrates and make VA-LCD with display unit (units thick 3.5 μ m).Liquid-crystal composition is injected into formation mesomorphic phase 4 in this unit, constitutes liquid crystal indicator.Among the embodiment, the characteristic of mensuration is as follows.
T
N-I: nematic phase-isotropy liquid phase transition temperature (℃)
Δ ε: dielectric constant anisotropy (25 ℃ and 1kHz)
Δ n: double refraction (20 ℃ and 589nm)
η: viscosity (mPas) (20 ℃)
Vth: threshold voltage (V) (25 ℃)
γ: abruptness (25 ℃) saturation voltage ((Vsat) and ratio (Vth))
γ＝Vsat/Vth
VHR: voltage retention (%) (70 ℃)
Represent the voltage Vt that kept after the 5V frame time 20msec and the ratio of initial stage voltage Vo (5V) with %.
VHR(％)＝Vt/Vo×100
Having used element thickness is the unit of the same recurrence orientation (alignment films is used the system JALS-204 of JSR Corp.) of 6 μ m.
(embodiment 1)
Make following liquid-crystal composition and its characteristic is measured.
(embodiment 2)
Make following liquid-crystal composition and its characteristic is measured.
(embodiment 3)
Make following liquid-crystal composition and its characteristic is measured.
(comparative example 1)
As a comparative example 1, make following liquid-crystal composition and its characteristic is measured.
(comparative example 2)
As a comparative example 2, make following liquid-crystal composition and its characteristic is measured.
Table 1 embodiment 1,2,3, comparative example 1 and 2 rerum natura
| |
|
|
Comparative example 1 | Comparative example 2 | |
| T N-I(℃) | 95.5 | 80.6 | 80.4 | 82.0 | 93.0 |
| Δ | -4.0 | -6.8 | -4.1 | -4.0 | -2.8 |
| η(mPa·S) | 23.8 | 25.2 | 17.2 | 23.5 | 47.5 |
| Δn | 0.097 | 0.091 | 0.095 | 0.081 | 0.098 |
| Vth(V) | 2.14 | - | 1.92 | 2.11 | 2.34 |
| γ | 2.06 | - | 1.98 | 2.30 | 2.22 |
| VHR(％) | 99.6 | 99.5 | 99.6 | 99.5 | 99.5 ％ |
When the roughly the same embodiment 1 of dielectric constant anisotropy and viscosity and comparative example 1 are compared, the nematic phase of embodiment 1-isotropy liquid phase transition temperature (T as can be known
N-I) quite high.When to nematic phase-isotropy liquid phase transition temperature (T
N-I) and the roughly the same embodiment 2 of viscosity and comparative example 1 when comparing, the anisotropic absolute value of the dielectric constant of embodiment 1 is quite big as can be known.In addition, when to nematic phase-isotropy liquid phase transition temperature (T
N-I) and the roughly the same embodiment 3 of dielectric constant anisotropy and comparative example 1 when comparing, the viscosity of embodiment 3 is quite low as can be known.
The liquid-crystal composition of comparative example 1 is nematic phase-isotropy liquid phase transition temperature (T
N-I), all quite excellent composition of balance of dielectric constant anisotropy and viscosity, but formation of the present invention is all than comparative example 1 excellence.In addition, has high nematic phase-isotropy liquid phase transition temperature (T
N-I) the liquid-crystal composition of comparative example 2 in, the anisotropic absolute value of dielectric constant is quite little, viscosity also increases considerably.
In addition, the liquid-crystal composition of embodiment has excellent abruptness, so compare with comparative example 1, can use low voltage drive, and have high voltage holding ratio, so be useful as the Active Matrix LCD At liquid crystal display device.Used the display element of the liquid-crystal composition of embodiment 6 to be suitable for the LCD TV that has high-speed responsive to require, the VA-LCD that requires the wide portable phone of liquid crystal temperature range, PDA purposes etc.
(embodiment 4)
Make following liquid-crystal composition and its characteristic is measured.
TN-I：100.2℃
Δε：-4.8
Δn：0.091
η：23.8mPa·s
Vth：1.81V
γ：1.91
VHR：99.5％
In addition, embodiment 4 has excellent abruptness and can low voltage drive, and has the higher voltage conservation rate, so more useful as active matrix.Used the display element of the liquid-crystal composition of embodiment 1 to be suitable for the LCD TV that has high-speed responsive to require, the VA-LCD that requires the wide portable phone of liquid crystal temperature range, PDA purposes etc.
(embodiment 5)
Make following liquid-crystal composition and its characteristic is measured.
T
N-I：84.8℃
Δε：-5.8
Δn ：0.086
η：24.1mPa·s
Vth：1.69V
γ：1.79
VHR：99.4％
(embodiment 6)
T
N-I：91.0℃
Δε：-4.9
Δn：0.093
η：25.2mPa·s
HR：99.6％
(embodiment 7)
T
N-I：83.7℃
Δε：-4.0
Δn：0.078
η：20.0mP
VHR：99.7％
Embodiment 7 has low viscosity, is suitable for having the VA-LCD of the LCD TV purposes etc. of high-speed responsive requirement.
(embodiment 8)
T
N-I：82.6℃
Δε：-4.4
Δn：0.094
η：21.5mPa·s
VHR：99.5％
Embodiment 8 has low viscosity, is suitable for having the VA-LCD of the LCD TV purposes etc. of high-speed responsive requirement.
(embodiment 9)
Make following liquid-crystal composition and its characteristic is measured.
T
N-I：93.7℃
Δε：-4.6
Δn：0.097
η：24.1mPa·s
Vth：1.92V
γ：1.95
VHR：99.5％
Embodiment 9 has higher nematic phase-isotropy liquid phase transition temperature (T
N-I), low viscosity.Be suitable for having the high-speed responsive requirement LCD TV, require the VA-LCD of the wide portable phone of liquid crystal temperature range, PDA purposes etc.
(embodiment 10)
Make following liquid-crystal composition and its characteristic is measured.
T
N-I：106.0℃
Δε：-4.2
Δn：0.099
η：26.5mPa·s
Vth：2.02V
γ：2.01
VHR：99.4％
(embodiment 11)
Make following liquid-crystal composition and its characteristic is measured.
T
N-I：94.8℃
Δ：-4.2
Δn：0.092
η：20.8mPa·s
Vth：2.06V
γ：1.97
VHR：99.5％
Embodiment 11 has low viscosity.Be suitable for having the VA-LCD of the LCD TV purposes etc. of high-speed responsive requirement.
(embodiment 12)
Make following liquid-crystal composition and its characteristic is measured.
T
N-I：100.1℃
Δε：-4.8
Δn：0.091
η：24.1mPa·s
Vth：1.80V
γ：1.91
VHR：99.4％
Embodiment 12 has higher nematic phase-isotropy liquid phase transition temperature (T
N-I), low viscosity.Be suitable for having the high-speed responsive requirement LCD TV, require the VA-LCD of the wide portable phone of liquid crystal temperature range, PDA purposes etc.
(embodiment 13)
Make following liquid-crystal composition and its characteristic is measured.
(comparative example 3)
As a comparative example 3, made following liquid-crystal composition and its characteristic has been measured.
(comparative example 4)
As a comparative example 4, make following liquid-crystal composition and its characteristic is measured.
Embodiment 13, comparative example 3 and 4 measurement result are as shown in the table.
Table 3 embodiment 13, comparative example 3 and 4 physics value
| Embodiment 13 | Comparative example 3 | Comparative example 4 | |
| T N-I(℃) | 86.9 | 72.0 | 79.8 |
| Δε | -8.1 | -7.6 | -5.8 |
| η(mPa·s) | 31.7 | 43.0 | 42.9 |
| Δn | 0.095 | 0.094 | 0.110 |
| Vth(V) | 1.35 | - | - |
| VHR(％) | 99.2 | 91.0 | 99.6％ |
Embodiment 13 is the sizable liquid-crystal compositions of the anisotropic absolute value of dielectric constant.Relative therewith, although the anisotropic absolute value of the dielectric constant of comparative example 3 is bigger, its nematic phase-isotropy liquid phase transition temperature (T
N-I) low, viscosity is also high, in addition, uses to have-OCF as conjugated group
2-and the compound of ester bond, so voltage retention is low, when being used for active matrix, it uses relatively difficulty.
In the formation of comparative example 4, the anisotropic absolute value of dielectric constant is significantly less than embodiment, and is unfavorable to low voltage drive, and viscosity is also quite high.
Embodiment 13 has the bigger negative dielectric constant anisotropy of absolute value, also has high conservation rate.Be suitable for having the VA-LCD of LCD TV that high reliability and low voltage drive require, portable phone, PDA purposes etc.
(embodiment 14)
T
N-I：98.5℃
Δε：-9.1
Δn：0.115
η：40.9mPa·s
VHR：99.2％
Embodiment 14 has higher nematic phase-isotropy liquid phase transition temperature (T
N-I), negative dielectric constant anisotropy, high conservation rate that absolute value is bigger.Be suitable for the LCD TV that has high reliability and low voltage drive to require, the VA-LCD that requires the wide portable phone of liquid crystal temperature range, PDA purposes etc.
(embodiment 15)
T
N-I：80.1℃
Δε：-7.3
Δn：0.086
η：27.1mPa·s
VHR：99.3％
Embodiment 15 has absolute value bigger negative dielectric constant anisotropy, high conservation rate.Be suitable for having the VA-LCD of LCD TV that high reliability and low voltage drive require, portable phone, PDA purposes etc.
(embodiment 16)
T
N-I：103.2℃
Δε：-7.2
Δn：0.091
η：28.8mPa·s
VHR：99.4％
Embodiment 16 has higher nematic phase-isotropy liquid phase transition temperature (T
N-I), negative dielectric constant anisotropy, high conservation rate that absolute value is bigger.Be suitable for the LCD TV that has high reliability and low voltage drive to require, the VA-LCD that requires the wide portable phone of liquid crystal temperature range, PDA purposes etc.
(embodiment 17)
T
N-1：89.6℃
Δε：-10.7
Δn：0.116
η：39.9mPa·s
Vth：1.22V
γ：1.82
VHR：99.4％
Embodiment 17 has absolute value bigger negative dielectric constant anisotropy, high conservation rate.Be suitable for having the VA-LCD of LCD TV that high reliability and low voltage drive require, portable phone, PDA purposes etc.
In above-mentioned, put down in writing and illustrated preferred implementation of the present invention, but they are typical examples of the present invention, and the indefiniteness explanation.Under the situation that does not break away from aim of the present invention or scope, can append, omit, replace and other changes.Therefore, the present invention is limited by above-mentioned explanation, but is limited by the scope of the claim of asking for protection.
Claims (22)
1, a kind of nematic liquid crystal composition is characterized in that,
Contain from general formula (IA), (IA-1), (IA-3), (IB), (IB-1) and at least a compound (IB-3) selected the compound group of expression, and its total content is 10～40 quality %;
Contain from general formula (IIA), (IIA-1), (IIA-3), (IIA-5), (IIB), (IIB-1), (IIB-3), (IIB-5), (IIC), (IIC-3), (IIC-7), (IIC-9), (IIC-10) and at least a compound (IID) selected the compound group of expression, its total content is 10～70 quality %;
With general formula (IIC), (IIC-3), (IIC-7), (IIC-9) and (IIC-10) content of the compound of expression be 10～40 quality %;
From the total content of general formula (IA), (IA-1), (IA-3), (IB), (IB-1), (IB-3), (IIC), (IIC-3), (IIC-7), (IIC-9) and the compound (IIC-10) selected the compound group of expression is 45～70 quality %;
And be 35～80 quality % from the total content of general formula (IA), (IA-1), (IA-3), (IB), (IB-1), (IB-3), (IIA), (IIA-1), (IIA-3), (IIA-5), (IIB), (IIB-1), (IIB-3), (IIB-5), (IIC), (IIC-3), (IIC-7), (IIC-9), (IIC-10) and at least a compound (IID) selected the compound group of expression
The compound that also contains 20～65 quality % in addition by general formula (III) expression,
The dielectric constant anisotropy in-12～-3 scope,
Nematic phase-isotropy liquid phase transition temperature T
N-IIn 80 ℃～120 ℃ scope,
Viscosity is below the 45mPas,
In the formula, R
1, R
3, R
5, R
7, R
9, R
11, R
12, R
13And R
14Separate, the expression carbonatoms is that 1～10 alkyl, carbonatoms are that 1～10 alkoxyl group, carbonatoms are that 2～10 alkenyl or carbonatoms are 2～10 alkenyloxy, the CH more than 1 or 2 that exists in this alkyl, this alkoxyl group, this alkenyl or this alkenyloxy
2Base, as O atom bonded group not mutually directly, can by-O-,-CO-or-COO-replaces,
R
2, R
4, R
6, R
8And R
10Separate, the expression carbonatoms is that 1～10 alkyl or carbonatoms are 2～10 alkenyl, and one or two or more CH existing in this alkyl or this alkenyl
2Base, as O atom bonded group not mutually directly, can by-O-,-CO-or-COO-replaces,
Z
1To Z
6And Z
9To Z
11Separate, the expression singly-bound ,-CH
2CH
2-,-CH=CH-,-CH
2CH
2CH
2CH
2-,-CH
2CH
2CH
2O-,-OCH
2CH
2CH
2-,-CH=CHCH
2CH
2-,-CH
2CH
2CH=CH-,-C ≡ C-,-CH
2O-,-OCH
2-,-CF
2O-,-COO-or-OCO-, Z
7And Z
8Separate, the expression singly-bound ,-CH
2CH
2-,-CH=CH-,-CH
2CH
2CH
2CH
2-,-CH
2CH
2CH
2O-,-OCH
2CH
2CH
2-,-CH=CHCH
2CH
2-,-CH
2CH
2CH=CH-,-C ≡ C-,-CH
2O-or-OCH
2-;
L and m represent 0 or 1;
A represents instead-1,4-ring caproic subunit or 1,4-phenylene;
B, C and D are separate, and expression is anti--1,4-ring caproic subunit, 1, and 4-phenylene or anti--1, the 4-phenylidene,
With
R wherein
1And R
3The expression carbonatoms is that 1～10 alkyl, carbonatoms are that 1～10 alkoxyl group, carbonatoms are that 2～10 alkenyl or carbonatoms are 2～10 alkenyloxy, one or more CH that exist in this alkyl, this alkoxyl group, this alkenyl or this alkenyloxy
2Base, as O atom bonded group not mutually directly, can by-O-,-CO-or-COO-replaces; And R
15The expression carbonatoms is that 1～10 alkyl or carbonatoms are 2～10 alkenyl,
With
R wherein
5And R
7The expression carbonatoms is that 1～10 alkyl, carbonatoms are that 1～10 alkoxyl group, carbonatoms are that 2～10 alkenyl or carbonatoms are 2～10 alkenyloxy, one or more CH that exist in this alkyl, this alkoxyl group, this alkenyl or this alkenyloxy
2Base, as O atom bonded group not mutually directly, can by-O-,-CO-or-COO-replaces, and R
15The expression carbonatoms is that 1～10 alkyl or carbonatoms are 2～10 alkenyl,
R wherein
9The expression carbonatoms is that 1～10 alkyl, carbonatoms are that 1～10 alkoxyl group, carbonatoms are that 2～10 alkenyl or carbonatoms are 2～10 alkenyloxy, one or more CH that exist in this alkyl, this alkoxyl group, this alkenyl or this alkenyloxy
2Base, as O atom bonded group not mutually directly, can by-O-,-CO-or-COO-replaces, and R
15The expression carbonatoms is that 1～10 alkyl or carbonatoms are 2～10 alkenyl.
2, nematic liquid crystal composition as claimed in claim 1 is wherein at general formula (IIA-1), (IIA-3), (IIA-5), (IIB-1), (IIB-3) with the R (IIB-5)
5And R
7The expression carbonatoms is that 1～5 alkyl or carbonatoms are 2～5 alkenyl.
3, nematic liquid crystal composition as claimed in claim 2, wherein said alkenyl are vinyl, 1-propenyl or 3-butenyl.
4, a kind of nematic liquid crystal composition is characterized in that,
Contain from general formula (IA), (IA-1), (IA-3), (IB), (IB-1) and at least a compound (IB-3) selected the compound group of expression, and its total content is 25～60 quality %;
Contain from general formula (IIA), (IIA-1), (IIA-3), (IIA-5), (IIB), (IIB-1), (IIB-3), (IIB-5), (IIC), (IIC-3), (IIC-7), (IIC-9), (IIC-10) and at least a compound (IID) selected the compound group of expression, its total content is 10～70 quality %;
From general formula (IA), (IA-1), (IA-3), (IB), (IB-1), (IB-3), (IIA), (IIA-1), (IIA-3), (IIA-5) (IIB), the total content of (IIB-1), (IIB-3) and the compound (IIB-5) selected the compound group of expression is 35～65 quality %
And be 35～80 quality % from the total content of general formula (IA), (IA-1), (IA-3), (IB), (IB-1), (IB-3), (IIA), (IIA-1), (IIA-3), (IIA-5), (IIB), (IIB-1), (IIB-3), (IIB-5), (IIC), (IIC-3), (IIC-7), (IIC-9), (IIC-10) and at least a compound (IID) selected the compound group of expression
The compound that contains 20～65 quality % in addition by general formula (III) expression,
The dielectric constant anisotropy in-12～-3 scope,
Nematic phase-isotropy liquid phase transition temperature T
N-IIn 80 ℃～120 ℃ scope,
Viscosity is below the 45mPas,
In the formula, R
1, R
3, R
5, R
7, R
9, R
11, R
12, R
13And R
14Separate, the expression carbonatoms is that 1～10 alkyl, carbonatoms are that 1～10 alkoxyl group, carbonatoms are that 2～10 alkenyl or carbonatoms are 2～10 alkenyloxy, the CH more than 1 or 2 that exists in this alkyl, this alkoxyl group, this alkenyl or this alkenyloxy
2Base, as O atom bonded group not mutually directly, can by-O-,-CO-or-COO-replaces,
R
2, R
4, R
6, R
8And R
10Separate, the expression carbonatoms is that 1～10 alkyl or carbonatoms are 2～10 alkenyl, and one or two or more CH existing in this alkyl or this alkenyl
2Base, as O atom bonded group not mutually directly, can by-O-,-CO-or-COO-replaces,
Z
1To Z
6And Z
9To Z
11Separate, the expression singly-bound ,-CH
2CH
2-,-CH=CH-,-CH
2CH
2CH
2CH
2-,-CH
2CH
2CH
2O-,-OCH
2CH
2CH
2-,-CH=CHCH
2CH
2-,-CH
2CH
2CH=CH-,-C ≡ C-,-CH
2O-,-OCH
2-,-CF
2O-,-COO-or-OCO-, Z
7And Z
8Separate, the expression singly-bound ,-CH
2CH
2-,-CH=CH-,-CH
2CH
2CH
2CH
2-,-CH
2CH
2CH
2O-,-OCH
2CH
2CH
2-,-CH=CHCH
2CH
2-,-CH
2CH
2CH=CH-,-C ≡ C-,-CH
2O-or-OCH
2-;
L and m represent 0 or 1;
A represents instead-1,4-ring caproic subunit or 1,4-phenylene;
B, C and D are separate, and expression is anti--1,4-ring caproic subunit, 1, and 4-phenylene or anti--1, the 4-phenylidene,
With
R wherein
1And R
3The expression carbonatoms is that 1～10 alkyl, carbonatoms are that 1～10 alkoxyl group, carbonatoms are that 2～10 alkenyl or carbonatoms are 2～10 alkenyloxy, one or more CH that exist in this alkyl, this alkoxyl group, this alkenyl or this alkenyloxy
2Base, as O atom bonded group not mutually directly, can by-O-,-CO-or-COO-replaces; And R
15The expression carbonatoms is that 1～10 alkyl or carbonatoms are 2～10 alkenyl,
With
R wherein
5And R
7The expression carbonatoms is that 1～10 alkyl, carbonatoms are that 1～10 alkoxyl group, carbonatoms are that 2～10 alkenyl or carbonatoms are 2～10 alkenyloxy, one or more CH that exist in this alkyl, this alkoxyl group, this alkenyl or this alkenyloxy
2Base, as O atom bonded group not mutually directly, can by-O-,-CO-or-COO-replaces, and R
15The expression carbonatoms is that 1～10 alkyl or carbonatoms are 2～10 alkenyl,
R wherein
9The expression carbonatoms is that 1～10 alkyl, carbonatoms are that 1～10 alkoxyl group, carbonatoms are that 2～10 alkenyl or carbonatoms are 2～10 alkenyloxy, one or more CH that exist in this alkyl, this alkoxyl group, this alkenyl or this alkenyloxy
2Base, as O atom bonded group not mutually directly, can by-O-,-CO-or-COO-replaces, and R
15The expression carbonatoms is that 1～10 alkyl or carbonatoms are 2～10 alkenyl.
5, nematic liquid crystal composition as claimed in claim 4 is wherein at general formula (IIA-1), (IIA-3), (IIA-5), (IIB-1), (IIB-3) with the R (IIB-5)
5And R
7The expression carbonatoms is that 1～5 alkyl or carbonatoms are 2～5 alkenyl.
6, nematic liquid crystal composition as claimed in claim 5, wherein said alkenyl are vinyl, 1-propenyl or 3-butenyl.
7, a kind of nematic liquid crystal composition is characterized in that,
Contain from general formula (IA), (IA-1), (IA-3), (IB), (IB-1) and at least a compound (IB-3) selected the compound group of expression, and its total content is 10～70 quality %;
Contain from general formula (IIA), (IIA-1), (IIA-3), (IIA-5), (IIB), (IIB-1), (IIB-3), (IIB-5), (IIC), (IIC-3), (IIC-7), (IIC-9), (IIC-10) and at least a compound (IID) selected the compound group of expression, its total content is 10～70 quality %;
From the total content of general formula (IA), (IA-1), (IA-3), (IB), (IB-1), (IB-3), (IIA), (IIA-1), (IIA-3), (IIA-5), (IIB), (IIB-1), (IIB-3) and the compound (IIB-5) selected the compound group of expression is 20～60 quality %
From the total content of general formula (IIC), (IIC-3), (IIC-7), (IIC-9), (IIC-10) and the compound (IID) selected the compound group of expression is 30～60 quality %,
And be 35～80 quality % from the total content of general formula (IA), (IA-1), (IA-3), (IB), (IB-1), (IB-3), (IIA), (IIA-1), (IIA-3), (IIA-5), (IIB), (IIB-1), (IIB-3), (IIB-5), (IIC), (IIC-3), (IIC-7), (IIC-9), (IIC-10) and the compound (IID) selected the compound group of expression
The compound that contains 20～65 quality % in addition by general formula (III) expression,
The dielectric constant anisotropy in-12～-3 scope,
Nematic phase-isotropy liquid phase transition temperature T
N-IIn 80 ℃～120 ℃ scope,
Viscosity is below the 45mPas,
In the formula, R
1, R
3, R
5, R
7, R
9, R
11, R
12, R
13And R
14Separate, the expression carbonatoms is that 1～10 alkyl, carbonatoms are that 1～10 alkoxyl group, carbonatoms are that 2～10 alkenyl or carbonatoms are 2～10 alkenyloxy, the CH more than 1 or 2 that exists in this alkyl, this alkoxyl group, this alkenyl or this alkenyloxy
2Base, as O atom bonded group not mutually directly, can by-O-,-CO-or-COO-replaces,
R
2, R
4, R
6, R
8And R
10Separate, the expression carbonatoms is that 1～10 alkyl or carbonatoms are 2～10 alkenyl, and one or two or more CH existing in this alkyl or this alkenyl
2Base, as O atom bonded group not mutually directly, can by-O-,-CO-or-COO-replaces,
Z
1To Z
6And Z
9To Z
11Separate, the expression singly-bound ,-CH
2CH
2-,-CH=CH-,-CH
2CH
2CH
2CH
2-,-CH
2CH
2CH
2O-,-OCH
2CH
2CH
2-,-CH=CHCH
2CH
2-,-CH
2CH
2CH=CH-,-C ≡ C-,-CH
2O-,-OCH
2-,-CF
2O-,-COO-or-OCO-, Z
7And Z
8Separate, the expression singly-bound ,-CH
2CH
2-,-CH=CH-,-CH
2CH
2CH
2CH
2-,-CH
2CH
2CH
2O-,-OCH
2CH
2CH
2-,-CH=CHCH
2CH
2-,-CH
2CH
2CH=CH-,-C ≡ C-,-CH
2O-or-OCH
2-;
L and m represent 0 or 1;
A represents instead-1,4-ring caproic subunit or 1,4-phenylene;
B, C and D are separate, and expression is anti--1,4-ring caproic subunit, 1, and 4-phenylene or anti--1, the 4-phenylidene,
With
R wherein
1And R
3The expression carbonatoms is that 1～10 alkyl, carbonatoms are that 1～10 alkoxyl group, carbonatoms are that 2～10 alkenyl or carbonatoms are 2～10 alkenyloxy, one or more CH that exist in this alkyl, this alkoxyl group, this alkenyl or this alkenyloxy
2Base, as O atom bonded group not mutually directly, can by-O-,-CO-or-COO-replaces; And R
15The expression carbonatoms is that 1～10 alkyl or carbonatoms are 2～10 alkenyl,
With
R wherein
5And R
7The expression carbonatoms is that 1～10 alkyl, carbonatoms are that 1～10 alkoxyl group, carbonatoms are that 2～10 alkenyl or carbonatoms are 2～10 alkenyloxy, one or more CH that exist in this alkyl, this alkoxyl group, this alkenyl or this alkenyloxy
2Base, as O atom bonded group not mutually directly, can by-O-,-CO-or-COO-replaces, and R
15The expression carbonatoms is that 1～10 alkyl or carbonatoms are 2～10 alkenyl,
R wherein
9The expression carbonatoms is that 1～10 alkyl, carbonatoms are that 1～10 alkoxyl group, carbonatoms are that 2～10 alkenyl or carbonatoms are 2～10 alkenyloxy, one or more CH that exist in this alkyl, this alkoxyl group, this alkenyl or this alkenyloxy
2Base, as O atom bonded group not mutually directly, can by-O-,-CO-or-COO-replaces, and R
15The expression carbonatoms is that 1～10 alkyl or carbonatoms are 2～10 alkenyl.
8, nematic liquid crystal composition as claimed in claim 7 is wherein at general formula (IIA-1), (IIA-3), (IIA-5), (IIB-1), (IIB-3) with the R (IIB-5)
5And R
7The expression carbonatoms is that 1～5 alkyl or carbonatoms are 2～5 alkenyl.
9, nematic liquid crystal composition as claimed in claim 8, wherein said alkenyl are vinyl, 1-propenyl or 3-butenyl.
10, as any one described nematic liquid crystal composition of claim 1 to 9, it is characterized in that,
With the compound of general formula (IA) expression is the general formula (IA-2) or (IA-4) compound of expression;
With the compound of general formula (IB) expression is the general formula (IB-2) or (IB-4) compound of expression;
In the formula, R
1And R
3The expression carbonatoms is that 1～10 alkyl, carbonatoms are that 1～10 alkoxyl group, carbonatoms are that 2～10 alkenyl or carbonatoms are 2～10 alkenyloxy, the CH more than 1 that exists in this alkyl, this alkoxyl group, this alkenyl or this alkenyloxy
2Base, as O atom bonded group not mutually directly, can by-O-,-CO-or-COO-replaces;
R
15The expression carbonatoms is that 1～10 alkyl or carbonatoms are 2～10 alkenyl.
11, as any one described nematic liquid crystal composition of claim 1 to 9, it is characterized in that,
With the compound of general formula (IIA) expression is general formula (IIA-2), (IIA-4) or (IIA-6) compound of expression;
With the compound of general formula (IIB) expression is general formula (IIB-2), (IIB-4) or (IIB-6) compound of expression;
In the formula, R
5And R
7The expression carbonatoms is that 1～10 alkyl, carbonatoms are that 1～10 alkoxyl group, carbonatoms are that 2～10 alkenyl or carbonatoms are 2～10 alkenyloxy, the CH more than 1 that exists in this alkyl, this alkoxyl group, this alkenyl or this alkenyloxy
2Base, as O atom bonded group not mutually directly, can by-O-,-CO-or-COO-replaces;
R
15The expression carbonatoms is that 1～10 alkyl or carbonatoms are 2～10 alkenyl.
12, nematic liquid crystal composition as claimed in claim 11, wherein R
5And R
7The expression carbonatoms is that 1～5 alkyl or carbonatoms are 2～5 alkenyl.
13, nematic liquid crystal composition as claimed in claim 12, wherein said alkenyl are vinyl, 1-propenyl or 3-butenyl.
14, as any one described nematic liquid crystal composition of claim 1 to 9, it is characterized in that,
With the compound of general formula (IIC) expression is general formula (IIC-1), (IIC-2), (IIC-4), (IIC-5), (IIC-6) or (IIC-8) compound of expression,
In the formula, R
9The expression carbonatoms is that 1～10 alkyl, carbonatoms are that 1～10 alkoxyl group, carbonatoms are that 2～10 alkenyl or carbonatoms are 2～10 alkenyloxy, the CH more than 1 that exists in this alkyl, this alkoxyl group, this alkenyl or this alkenyloxy
2Base, as O atom bonded group not mutually directly, can by-O-,-CO-or-COO-replaces;
R
15The expression carbonatoms is that 1～10 alkyl or carbonatoms are 2～10 alkenyl.
15, as any one described nematic liquid crystal composition of claim 1 to 9, it is characterized in that,
Compound with general formula (IID) expression is the compound of general formula (IID-1) to general formula (IID-3) expression,
In the formula, R
11The expression carbonatoms is that 1～10 alkyl, carbonatoms are that 1～10 alkoxyl group, carbonatoms are that 2～10 alkenyl or carbonatoms are 2～10 alkenyloxy, the CH more than 1 that exists in this alkyl, this alkoxyl group, this alkenyl or this alkenyloxy
2Base, as O atom bonded group not mutually directly, can by-O-,-CO-or-COO-replaces;
R
15The expression carbonatoms is that 1～10 alkyl or carbonatoms are 2～10 alkenyl.
16, nematic liquid crystal composition as claimed in claim 15, wherein R
11The expression carbonatoms is that 1～5 alkyl or carbonatoms are 2～5 alkenyl.
17, nematic liquid crystal composition as claimed in claim 16, wherein said alkenyl are vinyl, 1-propenyl or 3-butenyl.
18, as any one described nematic liquid crystal composition of claim 1 to 9, it is characterized in that,
Compound with general formula (III) expression is the compound of general formula (III-1) to general formula (III-22) expression,
In the formula, R
13And R
14Separate, the expression carbonatoms is that 1～10 alkyl, carbonatoms are that 1～10 alkoxyl group, carbonatoms are that 2～10 alkenyl or carbonatoms are 2～10 alkenyloxy, the CH more than 1 that exists in this alkyl, this alkoxyl group, this alkenyl or this alkenyloxy
2Base, as O atom bonded group not mutually directly, can by-O-,-CO-or-COO-replaces.
19, nematic liquid crystal composition as claimed in claim 18, wherein R
13And R
14Represent that independently of each other carbonatoms is that 1～5 alkyl or carbonatoms are 2～5 alkenyl.
20, nematic liquid crystal composition as claimed in claim 19, wherein said alkenyl are vinyl, 1-propenyl or 3-butenyl.
21, a kind of Active Matrix LCD At liquid crystal display device is characterized in that,
Used any described nematic liquid crystal composition in the claim 1～20.
22, a kind of VA pattern, IPS pattern or ecb mode liquid crystal display device is characterized in that,
Used any described nematic liquid crystal composition in the claim 1～20.
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| CN1042173A (en) * | 1988-10-20 | 1990-05-16 | 默克专利股份有限公司 | Supertwist liquid crystal display |
| CN1153807A (en) * | 1995-09-11 | 1997-07-09 | 智索公司 | Liquid crystalline compound replaced by fluorine containing group, liquid crystal composition, and liquid crystal display device |
| JP2001040354A (en) * | 1999-07-28 | 2001-02-13 | Dainippon Ink & Chem Inc | Nematic liquid crystal composition and liquid crystal display prepared by using same |
| EP1116770A1 (en) * | 1998-09-21 | 2001-07-18 | Dainippon Ink And Chemicals, Inc. | Nematic liquid crystal composition and liquid crystal display using the same |
| CN1303904A (en) * | 1999-10-28 | 2001-07-18 | 大日本油墨化学工业株式会社 | Liquid crystal composition |
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| CN1042173A (en) * | 1988-10-20 | 1990-05-16 | 默克专利股份有限公司 | Supertwist liquid crystal display |
| CN1153807A (en) * | 1995-09-11 | 1997-07-09 | 智索公司 | Liquid crystalline compound replaced by fluorine containing group, liquid crystal composition, and liquid crystal display device |
| EP1116770A1 (en) * | 1998-09-21 | 2001-07-18 | Dainippon Ink And Chemicals, Inc. | Nematic liquid crystal composition and liquid crystal display using the same |
| CN1350570A (en) * | 1998-09-21 | 2002-05-22 | 大日本油墨化学工业株式会社 | Namatic liquid crystal composition and liquid crystal display using the same |
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