CN105238417A - Liquid crystal composition and display element or displayer with same - Google Patents
Liquid crystal composition and display element or displayer with same Download PDFInfo
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- CN105238417A CN105238417A CN201510672311.7A CN201510672311A CN105238417A CN 105238417 A CN105238417 A CN 105238417A CN 201510672311 A CN201510672311 A CN 201510672311A CN 105238417 A CN105238417 A CN 105238417A
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Abstract
The invention discloses a liquid crystal composition and a display element or displayer with the same. The liquid crystal composition has one or more compositions of the general formula I, compositions of the general formula II and compositions of the general formula III, wherein the formulas can be seen in the specification, R1, R3 and R4 represent gaseous normal alkyl with 1-5 carbon atoms, R2 represents gaseous normal alkyl with 1-5 carbon atoms and alkenyl with 2-5 carbon atoms, and R5 represents H or gaseous normal alkyl with 1-3 carbon atoms. The liquid crystal composition is high in response speed, large in dielectric anisotropy, moderate in optical anisotropy, and high in light and heat stability and particularly suitable for IPS liquid crystal displays devices.
Description
Technical field
The present invention relates to a kind of liquid-crystal composition and comprise liquid crystal display device or the liquid-crystal display of this liquid-crystal composition.
Background technology
At present, it is more and more wider that the range of application of liquid crystalline cpd is expanded, and it can be applicable in polytype indicating meter, electro-optical device, sensor.For liquid crystalline cpd of a great variety in above-mentioned display field, wherein nematic liquid crystal is most widely used.Nematic liquid crystal has been applied in passive TN, STN matrix display and has had in the system of tft active matrix.
For thin-film transistor technologies (TFT-LCD) Application Areas, although market is very huge in recent years, technology is also ripe gradually, but people to the requirement of technique of display also in continuous raising, especially in realization response fast, reduce driving voltage to reduce in power consumption etc.Liquid crystal material as one of important photoelectron material of liquid-crystal display, the effect important to the performance improving liquid-crystal display.
As liquid crystal material, need to have good chemistry and thermostability and the stability to electric field and electromagnetic radiation.And as thin-film transistor technologies (TFT-LCD) liquid crystal material, not only need to have as outside upward stability, also should have the performances such as wider nematic temperature range, suitable degree of birefringence anisotropy, very high resistivity, good anti-ultraviolet property, high electric charge conservation rate and low-steam pressure.
At dynamic menu procedure for displaying, wish ghost and the hangover that can eliminate display frame as far as possible, require that liquid crystal has very fast response speed, therefore require that liquid crystal has lower rotary viscosity γ
1; In addition, for handheld device, in order to reduce equipment energy consumption, wish that the driving voltage of liquid crystal is low as far as possible; And for the indicating meter of the purposes such as TV, the driving voltage for liquid crystal requires it is not so low.
The viscosity of liquid crystalline cpd, especially rotary viscosity γ
1direct affect liquid crystal power up after time of response, no matter be rise time (t
on) or fall time (t
off), all with the rotary viscosity γ of liquid crystal
1proportional, rise time (t
on) due to relevant with liquid crystal cell and driving voltage, can be regulated with reduction liquid crystal cell box is thick by the method strengthening driving voltage; And fall time (t
off) have nothing to do with driving voltage, mainly thick relevant with liquid crystal cell box with the elastic constant of liquid crystal, the decline that box is thick can reduce fall time (t
off), and under different display modes, the mode of motion of liquid crystal molecule is different, TN, IPS, VA Three models is respectively at average elastic constants K, distortion elastic constant, bend elastic constant inversely.
According to liquid crystal continuum theory, after there is deformation in various different liquid crystal under external force (electric field, magnetic field) effect, can by intermolecular interaction, original shape is returned in meeting " resilience "; Same, liquid crystal is also because intermolecular interaction force forms " viscosity ".The subtle change of liquid crystal molecule, can make the conventional parameter performance of liquid crystal that significantly change occurs, these changes have plenty of certain rule, what have almost not easily finds rule, liquid crystal material and proportioning etc. thereof also can produce obvious impact for the interaction between liquid crystal molecule, these impacts are very delicate, also do not form very perfect theoretical explanation so far.
The viscosity of liquid crystal is relevant with liquid crystal molecule structure, and the relation studied between the viscosity of the liquid crystal system that different liquid crystal molecule is formed and liquid crystal molecule structure is one of vital task of dispensing liquid crystal slip-stick artist.
Summary of the invention
The technical issues that need to address of the present invention are to provide a kind of liquid-crystal composition and comprise liquid crystal display device or the liquid-crystal display of this liquid-crystal composition, this liquid-crystal composition has lower viscosity, quick response can be realized, there is the performances such as larger dielectric anisotropy Δ ε, moderate optical anisotropy Δ n, the high stability to light and heat, good anti-ultraviolet property, high electric charge conservation rate and low-steam pressure simultaneously.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is:
A kind of liquid-crystal composition, containing one or more generalformulaⅰcompounds, one or more general formula II compounds, one or more general formula III compounds,
Wherein, R
1, R
3, R
4represent that carbonatoms is the straight chained alkyl of 1 ~ 5, R
2represent carbonatoms be 1 ~ 5 straight chained alkyl, carbonatoms be the thiazolinyl of 2 ~ 5; R
5represent that H or carbonatoms are the straight chained alkyl of 1 ~ 3.
Δ n [589nm, 25 DEG C] > 0.08, Δ ε [1KHz, 25 DEG C] > 2, the clearing point Cp > 70.0 DEG C of above-mentioned liquid-crystal composition provided by the present invention, rotary viscosity γ
1[25 DEG C] are between 40 ~ 110mPas.
Liquid-crystal composition formula of I compound quality percentage composition provided by the present invention is 5 ~ 30%, and general formula II compound quality percentage composition is 5 ~ 20%, and general formula III compound quality percentage composition is 20 ~ 50%.
Further improvement of the present invention is: generalformulaⅰcompound is formula I 1 ~ I 4 compound, and general formula II compound is formula II 1 ~ II 25 general formula compound, and general formula III compound is formula III 1 ~ III 4 compound,
Each compound dielectric anisotropy Δ ε shown in formula I 1 ~ I 4 between 25 ~ 30, and has low rotary viscosity simultaneously, and clearing point is more than 120 DEG C, and Δ n is more than 0.2.Be conducive in raising liquid-crystal composition Δ ε, improve clearing point, improve Δ n.
Compound shown in general formula II 1 ~ II 25 generally has the optical anisotropy Δ n of suitable size, moderate limpid point value.Wherein, the end alkylate of II 1 to II 15 has good high temperature resistance and uv-resistant stability, and the end alkenyl compound of II 16 to II 25 has larger elastic constant K value, lower viscosity and faster response speed.
Compound shown in general formula III 1 ~ III 4 has very low rotary viscosity γ
1, close to neutral dielectric anisotropy Δ ε, less optical anisotropy Δ n, improving liquid crystal viscosity, low-temperature performance has advantage.Different alkyl substituents is to the rotary viscosity γ of liquid crystal
1, clearing point CP has impact, general longer alkyl chain or alkenylene chain can strengthen the rotary viscosity γ of liquid crystal
1improve clearing point CP simultaneously.
Compound shown in one or more formulas IV can also be added in liquid-crystal composition provided by the present invention,
R
6represent that carbonatoms is the alkyl of 2 ~ 5.Alkyl chain carbon atomicity is many, and the CP of liquid crystal can be higher, but viscosity can increase simultaneously.
Further improvement of the present invention is: formula IV compound is formula IV 1 ~ IV 4 compound, and the mass percentage of compound shown in liquid-crystal composition Chinese style IV is 1 ~ 25%,
Each compound shown in formula IV has medium Δ ε (about 6), higher CP, and lower viscosity is applicable to the viscosity of adjustable liquid crystal display, CP, Δ ε.
Liquid-crystal composition provided by the present invention, can also add compound shown in one or more formulas V, and the mass content of selecting of chemical combination shown in liquid-crystal composition Chinese style V is 1 ~ 25%,
R
7represent that carbonatoms is the thiazolinyl of 2 ~ 5.
Further improvement of the present invention is: compound shown in formula V is formula V 1 ~ V 2 compound,
The CP that shown in formula V, shown in compound with formula IV, Compound Phase is higher than having, lower viscosity, especially has larger elastic constant.Be conducive to improving response speed.
Compound shown in one or more formulas VI can also be added in liquid-crystal composition provided by the present invention,
R
8, R
9for carbonatoms is the straight chained alkyl of 1 ~ 5; (F) hydrogen or fluorine is represented.
Compound shown in formula VI has larger elastic constant K (K
11, K
22, K
33all larger), high clearing point CP (higher than 200 DEG C), but also there is viscosity γ bigger than normal simultaneously
1, can be used for K value parameter and the clearing point CP of adjustable liquid crystal display.
The compound of compound preferred formula VI 1 ~ VI 8 shown in formula VI,
VI 1 to VI 8 compound dielectric anisotropy Δ ε is basic close to neutral, and VI 1 to VI 5 compound also has side direction fluorine atom, is conducive to the mutual solubility improving liquid crystal.
Shown in liquid-crystal composition Chinese style VI provided by the present invention, compound preferred mass content is 1-15%.
The different ratios of each composition of liquid-crystal composition, slightly discrepant performance can be shown, the such as nematic phase of dielectric anisotropy Δ ε, optical anisotropy Δ n, liquid crystal is converted into the transition temperature point CP of liquid, low temperature stability inferior all can difference to some extent, can be applied to dissimilar display device, but identical feature is its rotary viscosity γ
1lower.Be applied to liquid crystal display device, quick response can be realized.
Can also add the doping agent of various function in liquid crystalline cpd provided by the present invention, dopant content is preferably between 0.01 ~ 1%, and these doping agents are antioxidant, UV light absorber, chiral agent mainly.Antioxidant, UV light absorber are preferably as follows compound:
S in above formula is the integer of 1 ~ 10.
Chiral agent is (left-handed or dextrorotation) following compound preferably:
The invention still further relates to the liquid crystal display device or indicating meter that comprise any one liquid-crystal composition above-mentioned, described display element or indicating meter are active matrix display element or indicating meter, passive matrix display element or indicating meter.
Described liquid crystal display device or the preferred active matrix addressed liquid crystal display element of liquid-crystal display or liquid-crystal display.
Described active matrix display element or indicating meter are specially TN-TFT or IPS-TFT liquid crystal display device or indicating meter.
Owing to have employed technique scheme, the technical progress that the present invention obtains is:
Liquid-crystal composition provided by the present invention has lower viscosity, can realize quick response, has moderate dielectric anisotropy Δ ε, moderate optical anisotropy Δ n, the high stability to light and heat simultaneously.
Comprise the liquid crystal material of liquid-crystal composition provided by the present invention, not only there is good chemistry and thermostability and the stability to electric field and electromagnetic radiation.And, as thin-film transistor technologies (TFT-LCD) liquid crystal material, also there is the performances such as wider nematic temperature range, suitable degree of birefringence anisotropy, very high resistivity, good anti-ultraviolet property, high electric charge conservation rate and low-steam pressure.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in further details, but the present invention is not limited to following examples.Described method is ordinary method if no special instructions.Described raw material all can obtain from open commercial sources if no special instructions.Described per-cent if no special instructions, is mass percent.
In following embodiment, CP represents clearing point, and directly use the micro-thermal analyzer of WRX-1S to measure, setting temperature rise rate is 3 DEG C/min.
Δ n represents optical anisotropy (589nm, 20 DEG C), and Δ ε represents dielectric anisotropy (25 DEG C, 1KHz, HP4284A, 5.2 microns of left-handed boxes of TN), γ
1rotary viscosity (mpas) when representing 20 DEG C, VHR (%) represents electric charge conservation rate (5V, 60Hz, 20 DEG C), ρ (× 10
13Ω cm) represent resistivity (20 DEG C), the tester of voltage retention VHR (%) and electricalresistivityρ (× 10
13Ω cm) be TOYO06254 and TOYO6517 type liquid crystal evaluation of physical property system (testing cassete is 7.0 microns for probe temperature 20 DEG C, time 16ms).
The present patent application embodiment liquid crystal monomer structure coded representation, the coded representation method of liquid crystal ring structure, end group, linking group sees the following form (one), shows (two).
Table (one): the corresponding code of ring structure
Table (two): end group and the corresponding code linking group
| End group with link group | Corresponding code |
| C nH 2n+1- | n |
| C nH 2n+1O- | nO |
| -CF 2O- | Q |
| -F | F |
| -CH 2＝CH 2- | V |
Citing:
be expressed as 3CCV1,
be expressed as 3BB (3F) B (3F, 5F) QB (3F, 5F) F.
Embodiment 1
Embodiment 2
Embodiment 3
Embodiment 4
Embodiment 5
Embodiment 6
Embodiment 7
Embodiment 8
As can be seen from the above embodiments: liquid-crystal composition of the present invention has lower rotary viscosity γ
1, for liquid-crystal display, quick response can be realized.Be particularly suitable for TN, IPS pattern liquid crystal material.
Claims (10)
1. a liquid-crystal composition, containing one or more generalformulaⅰcompounds, one or more general formula II compounds, one or more general formula III compounds,
Wherein, R
1, R
3, R
4represent that carbonatoms is the straight chained alkyl of 1 ~ 5, R
2represent carbonatoms be 1 ~ 5 straight chained alkyl, carbonatoms be the thiazolinyl of 2 ~ 5; R
5represent that H or carbonatoms are the straight chained alkyl of 1 ~ 3.
2. liquid-crystal composition according to claim 1, is characterized in that: generalformulaⅰcompound mass percentage is 5 ~ 30%, and general formula II compound quality percentage composition is 5 ~ 20%, and general formula III compound quality percentage composition is 20 ~ 50%.
3. liquid-crystal composition according to claim 1, is characterized in that: generalformulaⅰcompound is formula I 1 ~ I 4 compound, and general formula II compound is formula II 1 ~ II 25 general formula compound, and general formula III compound is formula III 1 ~ III 4 compound,
4. liquid-crystal composition according to claim 1, is characterized in that: also contained IV compound, and its mass percentage is 1 ~ 25%,
R
6represent that carbonatoms is the alkyl of 2 ~ 5.
5. liquid-crystal composition according to claim 4, is characterized in that: formula IV compound is formula IV 1 ~ IV 4 compound,
6. liquid-crystal composition according to claim 1, is characterized in that: also contained V compound, and its mass percentage is 1 ~ 25%,
R
7represent that carbonatoms is the thiazolinyl of 2 ~ 5.
7. liquid-crystal composition according to claim 6, is characterized in that: formula V compound is formula V 1 ~ V 2 compound,
8. liquid-crystal composition according to claim 1, is characterized in that: also contained VI compound, and its mass percentage is 1 ~ 15%,
R
8, R
9for carbonatoms is the straight chained alkyl of 1 ~ 5; (F) be hydrogen or fluorine.
9. liquid-crystal composition according to claim 8, is characterized in that: compound shown in formula VI is formula VI 1 ~ VI 8 compound,
10. the liquid-crystal composition according to any one of claim 1 ~ 9, it is characterized in that: liquid-crystal composition formula of I compound quality percentage composition is 6 ~ 20%, general formula II compound quality percentage composition is 5 ~ 15%, general formula III compound quality percentage composition is 20 ~ 42%, the mass percentage of formula IV compound is 10 ~ 20%, the mass percentage of formula V compound is 8 ~ 20%, and the mass percentage of formula VI compound is 5 ~ 15%.
Priority Applications (2)
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|---|---|---|---|
| CN201510672311.7A CN105238417B (en) | 2015-10-16 | 2015-10-16 | Liquid crystal composition and display element or displayer with same |
| TW104143900A TWI588245B (en) | 2015-10-16 | 2015-12-25 | Liquid crystal composition |
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|---|---|---|---|
| CN201510672311.7A CN105238417B (en) | 2015-10-16 | 2015-10-16 | Liquid crystal composition and display element or displayer with same |
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|---|---|
| CN105238417A true CN105238417A (en) | 2016-01-13 |
| CN105238417B CN105238417B (en) | 2017-05-24 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1862526A1 (en) * | 2006-05-31 | 2007-12-05 | Chisso Corporation | Liquid crystal compositions and liquid crystal display device |
| US20110127465A1 (en) * | 2009-12-01 | 2011-06-02 | Chisso Corporation | Liquid crystal composition and liquid crystal display device |
| EP2532726A2 (en) * | 2011-06-08 | 2012-12-12 | JNC Corporation | Liquid Crystal Composition and Liquid Crystal Display Device |
| CN104812872A (en) * | 2013-03-04 | 2015-07-29 | Dic株式会社 | Liquid crystal composition and liquid crystal display element using same |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI493021B (en) * | 2011-11-24 | 2015-07-21 | Shijiazhuang Chengzhi Yonghua Display Materials Co Ltd | Liquid crystal compounds |
| CN103074073B (en) * | 2012-12-20 | 2015-03-11 | 石家庄诚志永华显示材料有限公司 | Negative dielectric anisotropic liquid crystal mixture |
| CN103320145B (en) * | 2013-06-28 | 2015-01-07 | 石家庄诚志永华显示材料有限公司 | Fast response liquid crystal composition containing difluoromethylene ether |
| CN106085462A (en) * | 2013-11-07 | 2016-11-09 | 石家庄诚志永华显示材料有限公司 | Liquid-crystal composition and application thereof |
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2015
- 2015-10-16 CN CN201510672311.7A patent/CN105238417B/en active Active
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1862526A1 (en) * | 2006-05-31 | 2007-12-05 | Chisso Corporation | Liquid crystal compositions and liquid crystal display device |
| US20110127465A1 (en) * | 2009-12-01 | 2011-06-02 | Chisso Corporation | Liquid crystal composition and liquid crystal display device |
| EP2532726A2 (en) * | 2011-06-08 | 2012-12-12 | JNC Corporation | Liquid Crystal Composition and Liquid Crystal Display Device |
| CN104812872A (en) * | 2013-03-04 | 2015-07-29 | Dic株式会社 | Liquid crystal composition and liquid crystal display element using same |
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| Publication number | Publication date |
|---|---|
| TW201715026A (en) | 2017-05-01 |
| CN105238417B (en) | 2017-05-24 |
| TWI588245B (en) | 2017-06-21 |
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