CN109423302A - A kind of liquid-crystal composition and its application with high transmittance - Google Patents
A kind of liquid-crystal composition and its application with high transmittance Download PDFInfo
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- 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
- C09K19/44—Mixtures of liquid crystal compounds covered by two or more of the preceding groups C09K19/06 - C09K19/40 containing compounds with benzene rings directly linked
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- 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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Abstract
The present invention relates to a kind of liquid-crystal composition with high transmittance and its applications.The liquid-crystal composition includes the component of following parts by weight: (1), compound representated by 1~30% general formula I；(2), compound representated by 3~40% general formula II；(3), compound representated by 30~70% general formula III；(4), compound representated by 0~30% general formula IV；(5), compound representated by 0~30% general formula V.Liquid-crystal composition provided by the present invention significantly reduces the ε of liquid-crystal composition||/ε⊥(ratio of parallel dielectric and vertical dielectric) plays the good result for promoting transmitance.Exactly liquid-crystal composition provided by the present invention has big vertical dielectric, and then has high transmitance.
Description
Technical field
The present invention relates to a kind of liquid-crystal composition, specifically a kind of nematic phase liquid crystal composition, exactly this hair
Liquid-crystal composition provided by bright has big vertical dielectric, and more specifically liquid-crystal composition provided by the present invention has height
Transmitance.The invention belongs to liquid crystal material and its application fields.
Background technique
Currently, LCD product technology is mature, the technologies such as visual angle, resolution ratio, color saturation and brightness are successfully solved
Problem, display performance already close to or be more than CRT monitor.Large scale and small-medium size LCD respective field gradually
Occupy the dominant position of flat-panel monitor.Liquid crystal belongs to passive luminescence display, that is to say, that liquid crystal display panel played is photoswitch
Effect, light pass through liquid crystal display panel after transmitance be 6% or so, in order to promote brightness, need to reinforce backlight illumination, Jin Erxu
More electric energy are consumed for promoting backlight illumination.This greatly improves the cost of backlight.So promoting the saturating of liquid crystal display panel
Crossing rate becomes the difficult point of current liquid crystal display.
Specifically, reducing liquid-crystal composition for IPS (converting in face) and FFS (fringing field effect) mode display
ε||/ε⊥(ratio of parallel dielectric and vertical dielectric) can effectively promote the transmitance of liquid crystal display.It is provided by the present invention
Liquid-crystal composition significantly reduce the ε of liquid-crystal composition||/ε⊥, play the good effect for promoting transmitance.
Summary of the invention
Liquid-crystal composition provided by the present invention significantly reduces the ε of liquid-crystal composition||/ε⊥(parallel dielectric with it is vertical
The ratio of dielectric), play the good result for promoting transmitance.Exactly liquid-crystal composition provided by the present invention has big
Vertical dielectric, and then have high transmitance.
To achieve the goals above, the present invention adopts the following technical scheme:
A kind of liquid-crystal composition with high transmittance, including at least compound representated by a kind of general formula I:
R1Represent C1~C12Straight chained alkyl, wherein one or more non-conterminous CH2It can be taken by O, S or CH=CH
Generation；
And compound representated by least one general formula II:
R2、R3It is independently represented each other C1~C12Straight chained alkyl, alkoxy or C2~C12Straight-chain alkenyl；
Ring A1Represent trans- 1,4- cyclohexyl or 1,4- phenylene；
And compound representated by least one general formula III:
R4Represent C1~C12Straight chained alkyl；R5Represent C2~C12Straight-chain alkenyl；
Above-mentioned liquid-crystal composition includes the component of following parts by weight:
(1), compound representated by 1~30% general formula I；
(2), compound representated by 3~40% general formula II；
(3), compound representated by 30~70% general formula III；
(4), compound representated by 0~30% general formula IV；
(5), compound representated by 0~30% general formula V.
Compound representated by general formula I provided by the invention has big dielectric anisotropy and big vertical dielectric, tool
Body, compound representated by general formula I is selected from IA1~IA6.
Preferably, compound representated by general formula I is selected from one of IA2~IA5 or a variety of；More preferable IA3 or IA4 institute
The compound of representative.
Compound representated by general formula II provided by the invention contains 2,3- difluorobenzene structure, which has greatly vertical
Dielectric, specifically, compound representated by the general formula II is selected from the one or more of following compound:
Wherein, R2It is independently represented each other C1~C7Straight chained alkyl, R3It is independently represented each other C1~C7Straight chained alkyl
Or unbranched alkoxy.
Preferably, compound representated by general formula II is selected from one of compound representated by Formula II A1~Formula II B24
Or it is several:
It is highly preferred that compound representated by general formula II is selected from IIA10, IIA14, IIA15, IIB13, IIB14, IIB22
One of or a variety of, one of particularly preferred IIB13, IIB14, IIB22 or a variety of.
Compound twin nuclei representated by general formula III provided by the invention, the structure have low rotary viscosity, specifically
, compound representated by the general formula III is selected from one of following compound or a variety of:
Wherein, R4Represent C1~C7Straight chained alkyl.
Preferably, compound representated by general formula III is selected from one kind of compound representated by formula III A1~formula III D5
Or it is several:
It is highly preferred that compound representated by general formula III is selected from one of IIIA2, IIIB2, IIID3 or a variety of, it is special
Not preferred IIIA2 and/or IIIB2.
Preferably, liquid-crystal composition provided by the present invention can also include chemical combination representated by one or more general formula IV
Object:
R6Represent C1~C12Straight chained alkyl or C2~C12Straight-chain alkenyl, R7Represent C1~C12Straight chained alkyl；Ring A2Generation
The trans- 1,4- cyclohexyl of table or 1,4- phenylene；
Compound representated by general formula IV is selected from one of compound representated by formula IV A formula, IVB or a variety of:
Wherein, R6Represent C2~C7Straight chained alkyl or C2~C7Straight-chain alkenyl；R7Represent C1~C7Straight chained alkyl.
Preferably, compound representated by general formula IV is selected from one of formula IV A1~formula IV B22 structure or a variety of:
It is highly preferred that compound representated by general formula IV is selected from one of IVA1, IVA2, IVB12, IVB16 or a variety of.
Liquid-crystal composition provided by the present invention can also include liquid-crystal compounds representated by one or more general formula V:
Wherein, R8Represent C1~C12Straight chained alkyl or C2~C12Straight-chain alkenyl.
Compound representated by general formula V is that F replaces terphenyl compounds, such compound has big optical anisotropy
With biggish dielectric anisotropy and biggish vertical dielectric, can be promoted the optical anisotropy of liquid-crystal composition, dielectric respectively to
Anisotropic and vertical dielectric increases liquid-crystal composition low viscosity monomer and uses, reduce the rotary viscosity of liquid-crystal composition, promotes liquid crystal
The response time of composition and transmitance.
Specifically, compound representated by general formula V is selected from one of VA1~VA7 or a variety of:
Preferably, compounds of formula V provided by the present invention is selected from one of VA2, VA3, VA5, VA6 or a variety of,
Compound representated by particularly preferred VA2 and/or VA3.
Preferably, liquid-crystal compounds provided by the present invention includes the component of following mass percent:
(1), compound representated by 2~20% general formula I；
(2), compound representated by 5~30% general formula II；
(3), compound representated by 35~65% general formula III；
(4), compound representated by 0~25% general formula IV；
(5), compound representated by 0~25% general formula V.
It is highly preferred that liquid-crystal compounds provided by the present invention includes the component of following mass percent:
(1), compound representated by 4~15% general formula I；
(2), compound representated by 9~24% general formula II；
(3), compound representated by 43~58% general formula III；
(4), compound representated by 0~21% general formula IV；
(5), compound representated by 0~21% general formula V.
Preferably, liquid-crystal compounds provided by the present invention includes the component of following mass percent:
(1), compound representated by 2~20% general formula I；
(2), compound representated by 5~25% general formula II；
(3), compound representated by 38~65% general formula III；
(4), compound representated by 5~25% general formula IV；
(5), compound representated by 5~20% general formula V.
It is highly preferred that liquid-crystal compounds provided by the present invention includes the component of following mass percent:
(1), compound representated by 4~15% general formula I；
(2), compound representated by 9~20% general formula II；
(3), compound representated by 43~58% general formula III；
(4), compound representated by 6~21% general formula IV；
(5), compound representated by 11~18% general formula V.
Preferably, liquid-crystal compounds provided by the present invention includes the component of following mass percent:
(1), compound representated by 7~9% general formula I；
(2), compound representated by 17~24% general formula II；
(3), compound representated by 55% general formula III；
(4), compound representated by 12~21% general formula IV.
Preferably, liquid-crystal compounds provided by the present invention includes the component of following mass percent:
(1), compound representated by 7% general formula I；
(2), compound representated by 17~23% general formula II；
(3), compound representated by 55~58% general formula III；
(4), compound representated by 12~21% general formula V.
It is particularly preferred that liquid-crystal compounds provided by the present invention includes the component of following mass percent:
Liquid-crystal composition provided by the present invention aims to solve the problem that the transmitance problem of liquid crystal display, and research finds to increase liquid
Brilliant composition vertical dielectric and the ratio of parallel dielectric can play the effect for promoting liquid crystal display transmitance, add negativity monocrystalline
It can achieve the effect for promoting vertical dielectric, but the problem that ionic problem and viscosity existing for negativity monocrystalline are big is led
Cause that the liquid crystal display response time is slow, quality decline.It is surprising that compounds of formula I provided by the present invention has
Big vertical dielectric and dielectric anisotropy can reach the effect for promoting vertical dielectric after liquid-crystal composition is added, reduce general formula
II class compound uses, and promotes the transmitance of liquid crystal display, accelerates the response time, promotes the reliability of liquid crystal display.It is logical
Big compound dielectric anisotropy and vertical dielectric representated by Formulas I are as follows:
The compound of general formula I class provided by the present invention contains dioxygen heterocycle structure, due to the inducing action of O atom, greatly
Width improves the vertical dielectric and dielectric anisotropy of liquid-crystal compounds, promotes the dielectric anisotropy of liquid-crystal composition and vertical
Dielectric；Compound representated by general formula II has negative dielectric anisotropic, that is, has big vertical dielectric, and liquid-crystal composition is added
The vertical dielectric of liquid-crystal composition is substantially improved afterwards；Compound representated by general formula III is dicyclohexyl alkenes single crystal compound,
Such compound has low-down rotary viscosity, can effectively reduce the rotary viscosity of liquid-crystal composition；It is provided by the present invention
Liquid-crystal composition increases the vertical dielectric of liquid-crystal composition by addition class ii compound, promotes dielectric by compound I
Anisotropic and vertical dielectric, and then the liquid-crystal composition for the vertical dielectric for having big is obtained, promote liquid crystal display transmitance.
By the optimum organization of each component, and then obtain the liquid-crystal composition of the high transmittance with fast-response.
The preparation method of liquid-crystal composition of the present invention can be used conventional method and change two or more without specifically limited
It closes object mixing to be produced, such as the method preparation by mixing different component at high temperature and being soluble in one another, wherein by liquid crystal group
It closes object to dissolve in solvent in the solvent used for the compound and mix, then distills out the solvent under reduced pressure；Or it is of the present invention
Liquid-crystal composition can be prepared conventionally, such as wherein the lesser component of content will be dissolved in content at a higher temperature
In biggish main component, or each affiliated component dissolved in organic solvent, such as acetone, chloroform or methanol, it then will be molten
It is obtained after liquid mixing removal solvent.
Liquid-crystal composition of the present invention has big vertical dielectric constant, and then there is low parallel dielectric to be situated between with vertical
The ratio of electric constant, the use in IPS or FFS mode display can be obviously improved the transmitance of liquid crystal display, effectively
Ground improves display effect and reduces energy consumption.
Specific embodiment
The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention..
Unless otherwise indicated, percentage is weight percentage in the present invention；Temperature unit is degree Celsius；△ n represents optics
Anisotropy (25 DEG C)；ε//And ε⊥Respectively represent parallel and vertical dielectric constant (25 DEG C, 1000Hz)；△ ε represent dielectric respectively to
Anisotropic (25 DEG C, 1000Hz)；γ 1 represents rotary viscosity (mPa.s, 25 DEG C)；Cp represents the clearing point (DEG C) of liquid-crystal composition；
K11、K22、K33Respectively represent splay, distortion and bend elastic constant (pN, 25 DEG C).
In following embodiment, unit structure code shown in table 1 is indicated in liquid-crystal compounds.
Table 1: the group structure code of liquid-crystal compounds
By taking following compound structure as an example:
It indicates are as follows: 4DUQKF
It indicates are as follows: 5CCPUF
In following embodiment, the preparation of liquid-crystal composition is all made of heat of solution method, comprising the following steps: is pressed with balance
Weight percent weighs liquid-crystal compounds, wherein weighing addition sequence without particular requirement, usually with liquid-crystal compounds fusing point by height
Mixing is successively weighed to low sequence, heating stirring melts each component uniformly at 60~100 DEG C, using filter, rotate,
It finally encapsulates up to target sample.
In following embodiment, the performance parameter of the weight percent of each component when liquid-crystal composition is shown in liquid-crystal composition
Following table.
Embodiment 1
Table 2: the weight percent of each component when performance parameter in liquid-crystal composition
Embodiment 2
Table 3: the weight percent of each component when performance parameter in liquid-crystal composition
Embodiment 3
Table 4: the weight percent of each component when performance parameter in liquid-crystal composition
Embodiment 4
Table 5: the weight percent of each component when performance parameter in liquid-crystal composition
Embodiment 5
Table 6: the weight percent of each component when performance parameter in liquid-crystal composition
Embodiment 6
Table 7: the weight percent of each component when performance parameter in liquid-crystal composition
Embodiment 7
Table 8: the weight percent of each component when performance parameter in liquid-crystal composition
Embodiment 8
Table 9: the weight percent of each component when performance parameter in liquid-crystal composition
Embodiment 9
Table 10: the weight percent of each component when performance parameter in liquid-crystal composition
Embodiment 10
Table 11: the weight percent of each component when performance parameter in liquid-crystal composition
Embodiment 11
Table 12: the weight percent of each component when performance parameter in liquid-crystal composition
Comparative example 1
Table 13: the weight percent of each component when performance parameter in liquid-crystal composition
Compared with embodiment 1 is summarized with each performance parameter value of 1 gained liquid-crystal composition of comparative example, referring to table 14.
Table 14: the performance parameter of liquid-crystal composition compares
Known to relatively: compared with comparative example 1, the liquid-crystal composition that embodiment 1 provides has low parallel dielectric and hangs down
The ratio of straight dielectric, so having higher transmitance.
Transmitance is carried out to embodiment 1 and comparative example 1 to simulate to obtain following data table 15:
Table 15: embodiment 1 is compared with 1 transmitance of comparative example
| Embodiment 1 | Comparative example 1 | |
| Transmitance | 0.30336 | 0.28931 |
Embodiment 1 promotes 5.0% or so relative to the transmitance of comparative example 1.
As seen from the above embodiment, liquid-crystal composition provided by the present invention has big vertical dielectric, and then has more
The ratio of low parallel dielectric and vertical dielectric further has higher transmitance.Therefore, liquid crystal group provided by the present invention
IPS the or FFS type TFT liquid crystal display device that object is suitable for is closed, the transmitance of liquid crystal display can be obviously improved, reduces backlight
The energy loss in source, especially suitable for fast-response FFS type TV liquid crystal display.
Although above the present invention is described in detail with a general description of the specific embodiments,
On the basis of the present invention, it can be made some modifications or improvements, this is obvious for the technical staff of field.Therefore,
These modifications or improvements without departing from theon the basis of the spirit of the present invention are fallen within the scope of the claimed invention.
Claims (10)
1. a kind of liquid-crystal composition with high transmittance, which is characterized in that the component comprising following parts by weight:
(1), compound representated by 1~30% general formula I；
(2), compound representated by 3~40% general formula II；
(3), compound representated by 30~70% general formula III；
(4), compound representated by 0~30% general formula IV；
(5), compound representated by 0~30% general formula V；
Wherein, including at least compound representated by a kind of general formula I:
R1Represent C1~C12Straight chained alkyl, wherein one or more non-conterminous CH2It can be replaced O, S or CH=CH；
And compound representated by least one general formula II:
R2、R3It is independently represented each other C1~C12Straight chained alkyl, alkoxy or C2~C12Straight-chain alkenyl；
Ring A1Represent trans- 1,4- cyclohexyl or 1,4- phenylene；
And compound representated by least one general formula III:
R4Represent C1~C12Straight chained alkyl；R5Represent C2~C12Straight-chain alkenyl；
Compound representated by the general formula IV:
R6Represent C1~C12Straight chained alkyl or C2~C12Straight-chain alkenyl, R7Represent C1~C12Straight chained alkyl；Ring A2It represents anti-
Formula 1,4- cyclohexyl or 1,4- phenylene；
Liquid-crystal compounds representated by general formula V:
Wherein, R8Represent C1~C12Straight chained alkyl or C2~C12Straight-chain alkenyl.
2. liquid-crystal composition according to claim 1, which is characterized in that compound representated by general formula I be selected from IA1~
IA6。
3. liquid-crystal composition according to claim 1, which is characterized in that compound representated by the general formula II is selected from such as
One of lower compound is a variety of:
Wherein, R2Represent C1~C7Straight chained alkyl, R3Represent C1~C7Straight chained alkyl or unbranched alkoxy.
4. liquid-crystal composition according to claim 1, which is characterized in that compound representated by the general formula III is selected from
One of following compound is a variety of:
Wherein, R4Represent C1~C7Straight chained alkyl.
5. liquid-crystal composition according to claim 1, which is characterized in that compound representated by the general formula IV is selected from formula
One of compound representated by IVA formula, IVB is a variety of:
Wherein, R6Represent C2~C7Straight chained alkyl or C2~C7Straight-chain alkenyl；R7Represent C1~C7Straight chained alkyl.
6. liquid-crystal composition according to claim 1, which is characterized in that compound representated by the general formula V is selected from VA1
One of~VA7 or a variety of:
7. liquid-crystal composition according to claim 1, which is characterized in that the component comprising following mass percent:
(1), compound representated by 2~20% general formula I；
(2), compound representated by 5~30% general formula II；
(3), compound representated by 35~65% general formula III；
(4), compound representated by 0~25% general formula IV；
(5), compound representated by 0~25% general formula V.
8. liquid-crystal composition according to claim 1, which is characterized in that the component comprising following mass percent:
(1), compound representated by 4~15% general formula I；
(2), compound representated by 9~24% general formula II；
(3), compound representated by 43~58% general formula III；
(4), compound representated by 0~21% general formula IV；
(5), compound representated by 0~21% general formula V.
9. liquid-crystal composition according to claim 1, which is characterized in that the component comprising following mass percent:
(1), compound representated by 2~20% general formula I；
(2), compound representated by 5~25% general formula II；
(3), compound representated by 38~65% general formula III；
(4), compound representated by 5~25% general formula IV；
(5), compound representated by 5~20% general formula V.
10. application of any liquid-crystal composition of claim 1-9 in IPS or FFS mode display.
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