CN102140351B - Liquid crystal composite for liquid crystal display - Google Patents
Liquid crystal composite for liquid crystal display Download PDFInfo
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- CN102140351B CN102140351B CN201010109009.8A CN201010109009A CN102140351B CN 102140351 B CN102140351 B CN 102140351B CN 201010109009 A CN201010109009 A CN 201010109009A CN 102140351 B CN102140351 B CN 102140351B
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Abstract
The invention discloses a liquid crystal composite for the liquid crystal display. The liquid crystal composite at least contains a liquid crystal material with negative dielectric constant anisotropy and at least two different reactive monomers, wherein the reactive monomers account for 0.05-10wt% of the liquid crystal composite. The invention also provides a liquid crystal display using the liquid crystal composite.
Description
Technical field
The present invention relates to a kind of liquid-crystal composition, particularly a kind of liquid-crystal composition for liquid-crystal display.
Background technology
Vertical orientated (vertically aligned, VA) type liquid-crystal display is a kind of type of using negative type liquid crystal material and vertical orientated film.When without driving voltage for seasonable, liquid crystal molecule is arranged in the vertical direction and is roughly presented blank screen and show (being normally black display).When supplying with predefined voltage, liquid crystal molecule is arranged in the horizontal direction and is presented white screen display (white display).Compare with twisted nematic (Twist-Nematic, TN) liquid-crystal display, vertical alignment-type liquid crystal indicating meter can provide higher contrast and speed of response faster.Yet vertical alignment-type liquid crystal indicating meter still has the narrow critical defect of field-of-view angle, this causes the restricted problem of vertical alignment-type liquid crystal display application.
The field-of-view angle performance of known vertical alignment-type liquid crystal indicating meter, can be improved by the orientation of liquid crystal molecule in pixel (orientation) being set as to a plurality of different directions each other.The open case of European patent discloses a multizone vertical orientating type (multi-domain vertically alignment, MVA) liquid-crystal display, it has region and adjusts member (domain regulator) to adjust the orientation of liquid crystal, and the liquid crystal molecule when imposing voltage in this liquid crystal is the skewed arrangement of all directions and makes the orientation system of liquid crystal in each pixel comprise multiple directions.Yet, when imposing specific voltage, need to make liquid crystal aligning stable the longer time, so MVA liquid-crystal display speed of response is slower.
In order to improve foregoing problems, United States Patent (USP) also proposes to utilize the method for polymer its orientation of standard when driving liquid crystal molecule, its content be by the sealing liquid crystal that is mixed with high polymer monomer in two substrates, and when being applied with voltage, two substrates will carry out polyreaction, even if stop thus applying voltage, liquid crystal still can have specific tilt angle under high molecular standard.Although the MVA liquid-crystal display of this United States Patent (USP) has speed of response faster, but the ghost proportional part of its reliability test cannot obtain desirable result (ghost ratio (Image sticking ratio, α), ghost refers to after the same image of long-time demonstration, while switching to other demonstration, the phenomenon that image above can be residual.When ghost ratio value is higher, the phenomenon of representative image residue is above more serious, represents that the reliability of indicating meter is poor.
Summary of the invention
Therefore, the object of the present invention is to provide a kind of novel liquid-crystal composition, it can reduce the ghost ratio of made liquid-crystal display, effectively promotes thus reliability.
For reaching above-mentioned and other object, liquid-crystal composition of the present invention mainly comprises at least two kinds of different reactive monomers and has the liquid crystal material of negative permittivity anisotropy (dielectric constant anisotropy).The weight percent that described reactive monomer accounts for described liquid-crystal composition is altogether 0.05% to 10%.
According to liquid-crystal composition of the present invention, can also comprise light trigger (weight percent is less than 0.002, the ratio based on liquid-crystal composition gross weight), to accelerate follow-up polyreaction.
In liquid-crystal composition of the present invention, preferably at least one reactive monomer has following formula (I) or formula (II):
A1-M1-B1-M2-C1-B4(I)
A1-B1-M1-C1-B2-C2-B3-M2-A2(II)
The monomer of formula (I) has one-sided reactive group A1, the monomer of formula (II) has reactive group A1 and the A2 of bilateral, A1 and A2 can be identical or different, and A1 and A2 can represent acrylate-based, methacrylate based, vinyl, vinyloxy group (vinyloxy group) or epoxy group(ing).
In formula (I) or formula (II), B1 and B3 can be identical or different, and B1 and B3 can represent Isosorbide-5-Nitrae-phenylene
phenylbenzene
naphthalene-2,6-bis-bases
or phenoxy group
In formula (II), B2 representative replaces or unsubstituted Isosorbide-5-Nitrae-phenylene; Preferably, B2 has following formula (III):
R wherein
1represent alkyl or aromatic base.
In formula (I), B4 represents that cholesteryl is for example:
or benzene-oxygen-alkyl
(R represents alkyl);
In formula (I) or formula (II), C1 and C2 can be identical or different, and C1 and can represent-COO-of C2 ,-OCO-or-O-.
In formula (I) or formula (II), M1 and M2 can be identical or different, and M1 and M2 can represent
n is the positive integer between 0 to 11.
In the liquid-crystal composition of one embodiment of the invention, at least one reactive monomer has one-sided reactive group (monomer for example with formula (I)), and at least another kind of reactive monomer has the reactive group (monomer for example with formula (II)) of bilateral.
In the liquid-crystal composition of another embodiment of the present invention, at least two kinds of different reactive monomers have the reactive group (monomer for example with formula (II)) of bilateral.
Liquid-crystal composition of the present invention can be in order to form the liquid crystal layer of multizone vertical orientating type (MVA) liquid-crystal display.When being applied with voltage, carry out after polyreaction, aforesaid two kinds of reactive monomers will aggregate into derivatized polymers in substrate both sides, and this derivatized polymers has a plurality of large volume side chains (bulky side chain), it comprises, but be not limited to cholesteryl side chain, benzene-oxygen-alkyl group side chain or benzene-cycloalkyl side chain.Thus, the cancellated a plurality of large volume side chains of aforementioned polymer can be when not applying voltage, the orientation of standard liquid crystal molecule.
In the liquid-crystal composition of one embodiment of the invention, the reactive monomer that has large volume side chain and have an one-sided reactive group accounts for the weight percent < 30% of total overall reaction monomer.
In the liquid-crystal composition of another embodiment of the present invention, the reactive monomer that has large volume side chain and have an one-sided reactive group accounts for the weight percent 10%～20% of total overall reaction monomer.
With only to compare containing the made liquid-crystal display of the reactive monomer liquid-crystal composition of single kind, the made liquid-crystal display of liquid-crystal composition that utilizes the present invention to contain at least two kinds of reactive monomers has lower ghost ratio, effectively promotes thus reliability.
Accompanying drawing explanation
Fig. 1 to Fig. 4 is the cut-away view of the key step of the manufacture method of liquid-crystal display according to an embodiment of the invention.
Fig. 5 to Fig. 6 is that liquid crystal display substrate surface has the cancellated SEM scintigram of polymer according to an embodiment of the invention.
Fig. 7 is the cancellated local enlarged diagram in Fig. 4 of the present invention.
Primary clustering nomenclature
110 first substrates
112 pixel electrodes
112a slit
120 second substrates
122 common electrodes
130 vertical alignment layers
140 liquid crystal molecules
150 reactive monomers
152 derivatized polymers
154 large volume side chains
Embodiment
Although the present invention can show as multi-form embodiment, but shown in accompanying drawing and hereinafter explanation is the preferred embodiments of the present invention, and please understand the disclosed herein example of the present invention that is thought of as, and be not intended to the present invention to be limited in diagram and/or described specific embodiment.
The present invention relates to a kind of liquid-crystal composition of novelty, it mainly comprises and has the anisotropic liquid crystal material of negative permittivity, and at least two kinds of different reactive monomers.When having the anisotropic liquid crystal material of negative permittivity, be sealed in two between vertical orientated treatment substrate time, the liquid crystal molecule that described liquid crystal material comprises is approximately perpendicular to substrate surface when being roughly applied to this liquid crystal layer without electric field.
The weight percent that described reactive monomer accounts for described liquid-crystal composition is altogether 0.05% to 10%.When reactive monomer weight percent is less than 0.05, its formed polymer is not enough to its orientation of standard stable, that have reproducibility when driving liquid crystal molecule; When reactive monomer weight percent is greater than 10, between liquid crystal molecule and derivatized polymers, anchorage force is too high, easily produces the too high shortcoming of operating voltage.This weight percent refers to the ratio based on liquid-crystal composition gross weight.
According to liquid-crystal composition of the present invention, also can comprise light trigger (weight percent is less than 0.002, the ratio based on liquid-crystal composition gross weight), to accelerate follow-up polyreaction.Any light trigger that can form free radical when imposing suitable radiation, is all applicable to the present invention.The general light trigger using together with helium cadmium laser (He-Cd Laser) (as irradiating source) is phenyl methyl ketone compounds (acetophenone).
In liquid-crystal composition of the present invention, preferably at least one reactive monomer has following formula (I) or formula (II):
A1-M1-B1-M2-C1-B4(I)
A1-B1-M1-C1-B2-C2-B3-M2-A2(II)
The monomer of formula (I) has one-sided reactive group A1, the monomer of formula (II) has reactive group A1 and the A2 of bilateral, A1 and A2 can be identical or different, and A1 and A2 can represent acrylate-based, methacrylate based, vinyl, vinyloxy group (vinyloxy group) or epoxy group(ing).
In formula (I) or formula (II), B1 and B3 can be identical or different, and B1 and B3 can represent Isosorbide-5-Nitrae-phenylene
phenylbenzene
naphthalene-2,6-bis-bases
or phenoxy group
In formula (II), B2 can represent and replace or unsubstituted Isosorbide-5-Nitrae-phenylene; Preferably, B2 has following formula (III):
R wherein
1can represent alkyl or aromatic base.
In formula (I), B4 for example can represent cholesteryl:
or benzene-oxygen-alkyl
(R represents alkyl);
In formula (I) or formula (II), C1 and C2 can be identical or different, and C1 and can represent-COO-of C2 ,-OCO-or-O-.
In formula (I) or formula (II), M1 and M2 can be identical or different, and M1 and M2 can represent
n is the positive integer between 0 to 11.
In the liquid-crystal composition of one embodiment of the invention, at least one reactive monomer has one-sided reactive group (monomer for example with formula (I)), and at least another kind of reactive monomer has the reactive group (monomer for example with formula (II)) of bilateral.
In the liquid-crystal composition of another embodiment of the present invention, at least two kinds of different reactive monomers have two reactive groups (monomer for example with formula (II)) of bilateral.
Can be used for the reactive monomer with formula (I) or formula (II) of the present invention as follows, but improper being inferred as of the present invention only limits to these compounds.
Wherein R represents alkyl-C
nh
2n+1, n is the positive integer between 0 to 11;
Wherein X represents linking group, for example:
-COO-,-OCO-or-O-, n is the positive integer between 0 to 11;
R wherein
1represent alkyl-C
nh
2n+1, n is the positive integer between 0 to 11;
R wherein
2represent alkyl-C
nh
2n+1, n is the positive integer between 0 to 11;
R wherein
3represent alkyl-C
nh
2n+1, n is the positive integer between 0 to 11.
R wherein
4represent alkyl-C
nh
2n+1, Y represents alkyl-C
nh
2n+1, A and B can be identical or different, representation ring alkyl.
Liquid-crystal composition of the present invention can be in order to form the liquid crystal layer of multizone vertical orientating type (MVA) liquid-crystal display.The MVA liquid-crystal display that utilizes liquid-crystal composition of the present invention to form has lower ghost ratio, effectively promotes thus its reliability.
Refer to Fig. 1, MVA liquid-crystal display according to the present invention mainly comprises first substrate 110 and second substrate 120.Outside first substrate 110 and second substrate 120, can be respectively equipped with polaroid (not being shown in figure), in order to by polarization of light.First substrate 110 can be provided with backlight (not being shown in figure) behind, and for example a backlight module is located at this LCD unit 120 behind.
Please, again referring to Fig. 1, MVA liquid-crystal display of the present invention can be a kind of Thin Film Transistor-LCD.On first substrate 110, can be provided with many brake cable roads (gate line) and data circuit (data lines) (not being shown in figure) that are arranged.Described brake cable road is general parallel to each other and perpendicular to described data circuit.A plurality of thin film transistors (not being shown in figure) become matrix form to be arranged in the cross section of these brake cable roads and data circuit with pixel electrode.First substrate can separately be provided with the auxiliary capacitor circuit (not being shown in figure) of the individual wired parallel with brake cable road.Second substrate 120 can be provided with for example light shield layer (BM) (not being shown in figure) of a smooth shading array; A plurality of chromatic filter layers (not being shown in figure) and common electrode 122.Generally speaking, first substrate is called thin film transistor base plate, and second substrate is called colored optical filtering substrates because it is provided with chromatic filter layer.Between first and second substrate, be generally provided with distance piece (spacer) (not being shown in figure) in order to define the interval (gap) between this substrate.In the present embodiment, pixel electrode 112 is provided with slit 112a and adjusts member (domain regulator) as region, in order to adjust the orientation (orientation) of liquid crystal layer, make liquid crystal molecules tilt orientation when voltage applies and make this orientation comprise a plurality of different directions, obtain thus wide viewing angle performance.First substrate 110 is vertically oriented processing with the surface of second substrate 120, for example, vertical alignment layer 130 is set.
Please, again referring to Fig. 1, after first substrate 110 and second substrate 120 combinations, the aforementioned liquid-crystal composition that comprises liquid crystal material (being illustrated as a plurality of liquid crystal molecules 140) and at least two kinds of differential responses monomers 150 is sealed in and forms liquid crystal layer therebetween.Specifically, first first substrate 110 is alignd mutually with second substrate 120, and spaced apart with the distance of about 4 microns, and Zai Yuqi edge utilizes epoxy resin to combine.Then, by this in conjunction with after substrate and the liquid crystal utensil that fills with foregoing liquid crystal composition of the present invention be placed in a vacuum chamber, now, between substrate after this combination is interior, gap is in vacuum state.Afterwards, the filling mouth of the substrate after this combination, towards this liquid crystal utensil, and is contacted with on this liquid-crystal composition, then destroys vacuum, the pressure difference of the substrate inside and outside after making this liquid crystal material by capillary effect and this combination and the suction gradually via filling mouthful.In addition the Fast Filling technology that also can use developed recently to go out, i.e. so-called liquid crystal drop following formula (One Drop Fill) technology.In this technology, substrate, before being combined with another substrate, accommodates the liquid-crystal composition that drop is inserted.
As shown in Figure 1, when roughly applying without electric field, liquid crystal molecule 140 is approximately perpendicular to first substrate 110 and second substrate 120 surfaces.When imposing one while presetting voltage, as shown in Figure 2, near the slit 112a of pixel electrode 112 (electrode edge), there is the electric field (as shown in Fig. 2 dotted line) that favours this substrate surface to produce.The tilting electric field producing between substrate has determined the vergence direction of liquid crystal molecule 140 at this place.In Fig. 2, the orientation of this liquid crystal is divided into two different directions.
Keeping applying under the aforementioned state that presets voltage, with UV-light (as shown by the arrows in Figure 3), irradiating the liquid crystal layer that is located in 120 of first substrate 110 and second substrates.UV-light can be from the high pressure mercury vapour lamp of a UV curing apparatus or helium cadmium laser (not being shown in figure).As shown in Figure 3, now in liquid crystal layer, original two kinds of reactive monomers will aggregate into respectively in substrate both sides an acrylic ester polymer reticulated structure 152, and this derivatized polymers 152 has a plurality of large volume side chains (bulky side chain) 154, it comprises, but be not limited to cholesteryl side chain, benzene-oxygen-alkyl group side chain or benzene-cycloalkyl side chain.
Thus, a plurality of large volume side chains 154 of aforementioned polymer reticulated structure 152 can be when not applying voltage, and near the orientation of liquid crystal molecule standard substrate-side can be utilized tilt angle and the orientation of liquid crystal molecule 140 in the theoretical stabilized baseplate of continuous elastomeric thus.As shown in Figure 4, the orientation of this liquid crystal is divided into two different directions to example, obtains thus wide viewing angle performance.
In the liquid-crystal composition of one embodiment of the invention, the reactive monomer that has large volume side chain and have an one-sided reactive group accounts for the weight percent < 30% of total overall reaction monomer; In the liquid-crystal composition of another embodiment of the present invention, the reactive monomer that has large volume side chain and have an one-sided reactive group accounts for the weight percent 10%～20% of total overall reaction monomer.
Fig. 5 to 6 is that liquid crystal display substrate surface has the cancellated SEM scintigram of polymer according to an embodiment of the invention.It is worth mentioning that, UV-irradiation can make monomer reaction and generate the have polymer projection reticulated structure of (Fig. 5,6).As shown in the figure, polymer projection can be linear, circular or other different geometries, it is different and different that its geometrical shape is looked preparation process.
Concrete example is below, and it is only illustrative should being considered as, and in any situation, is not the other parts that limit this exposure.If further do not set forth, believe the narration that those skilled in the art can be based at this and make full use of the present invention.
Comparing embodiment
Only to contain the liquid-crystal composition of single kind reactive monomer, manufacture liquid-crystal display
By various reactive monomer structures as shown in Table 1, respectively with commercially available liquid crystal material, and commercially available light trigger mixes, and obtains liquid-crystal composition (reactive monomer weight percent 0.3, photoinitiator levels 60ppm).Then, liquid-crystal composition is sealed in the two substrates that disposes vertical alignment layer, and carries out polyreaction when two substrates is applied with voltage.The liquid-crystal display making is carried out after reliability test (50 ℃/120hrs/12V/60Hz), the ghost ratio that it records (Imagesticking rate, α), in detail as shown in the formula) as shown in Table 1.
Ghost ratio α=(β-γ)/γ * 100%
The detection mode of ghost ratio is as follows: first operation display detects for some time under picture in black and white.Then, then by the brightness value of display picture switch to middle GTG; Wherein, β represents the brightness value that shows white picture area originally, and γ represents the brightness value that shows black picture area originally.α value is less, and the difference of representative (β-γ) is less, and reliability is better.
Table one
| Comparing embodiment | Reactive monomer | α |
| 1 | PLC-7223(n＝6) | 4.12 |
| 2 | PLC-7240 | 35.2 |
| 3 | PLC-7223(n＝3) | 2.25 |
| 4 | PLC-7257(n＝6) | 1.86 |
| 5 | PLC-7257(n＝3) | 1.63 |
| 6 | PLC-7212 | 1.98 |
| 7 | PLC-7238 | 4.4 |
| 8 | PLC-7199 | 6.59 |
Embodiment
With the liquid-crystal composition containing at least two kinds of reactive monomers, manufacture liquid-crystal display
By various reactive monomers combination as shown in Table 2, respectively with commercially available liquid crystal material, and commercially available light trigger mixes, and obtains liquid-crystal composition (reactive monomer accounts for weight percent 0.3, photoinitiator levels 60ppm altogether).Then, liquid-crystal composition is sealed in the two substrates that disposes vertical alignment layer, and carries out polyreaction when two substrates is applied with voltage.The liquid-crystal display making is carried out after reliability test (50 ℃/120hrs/12V/60Hz), the ghost ratio that it records (Imagesticking rate, α), in detail as shown in the formula) as shown in Table 2.
Table two
| Embodiment | Reactive monomer combination | α |
| 1 | PLC-7223(n＝6)+PLC-7238 (9∶1) | 1.39 |
| 2 | PLC-7223(n＝6)+PLC-7238 (8∶2) | 0 |
| 3 | PLC-7223+PLC-7199 (9∶1) | 1.73 |
| 4 | PLC-7223+PLC-7199 (8∶2) | 3.16 |
| 5 | PLC-7223+PLC-7199 (7∶3) | 3.83 |
| 6 | PLC-7240+PLC-7223(5∶5) | 3.83 |
| 7 | PLC-7240+PLC-7223(2∶8) | 1.58 |
| 8 | PLC-7240+ PLC-7257(n＝6)+ PLC-7257(n＝3) (0.5∶2∶0.5) | 1.32 |
| 9 | PLC-7238+ PLC-7257(n＝6)+ PLC-7257(n＝3) (8∶72∶18) | -0.32 |
The reactive monomer (being PLC-7223) of the reactive monomer that the liquid-crystal composition that embodiment 1 and 2 is used contains formula (I) (being PLC-7238) and formula (II), the ghost ratio that it records is all low than only containing PLC-7223 (comparing embodiment 1) or only containing the ghost ratio that PLC-7238 (comparing embodiment 7) records.By result, show that having with simple use the derivatized polymers that long carbochain reactive monomer (PLC-7223) forms compares, the reactive monomer PLC-7238 of interpolation because of have a plurality of large volume side chains further the orientation of stabilizing liquid crystal molecule there is preferred reliability.
The reactive monomer (being PLC-7223) of the reactive monomer that the liquid-crystal composition that embodiment 3 to 5 is used contains formula (I) (being PLC-7199) and formula (II), the ghost ratio that it records is all low than only containing PLC-7223 (comparing embodiment 1) or only containing the ghost ratio that PLC-7199 (comparing embodiment 8) records, compare with 2 with embodiment 1, embodiment 3 to 5 formed reticulated structures have preferred avidity because having the side chain of class liquid crystal molecule with liquid crystal molecule, further stabilizing liquid crystal molecular orientation have preferred reliability.
The reactive monomer that the liquid-crystal composition that embodiment 6 and 7 is used contains two kinds of formulas (II) (being PLC-7223 and PLC-7240), the ghost ratio that it records is all low than only containing PLC-7223 (comparing embodiment 1) or only containing the ghost ratio that PLC-7240 (comparing embodiment 2) records, by result, learnt, formed derivatized polymers is because connecing structure to the similar side chain with large volume of embodiment 1 and 2, and then obtains preferred reliability.
The reactive monomer that the liquid-crystal composition that embodiment 8 and 9 is used contains three kinds of formulas (II), wherein, the liquid-crystal composition that embodiment 8 and 9 is used comprises PLC-7240, PLC-7257 (n=6) and PLC-7257 (n=3), the ghost ratio that it records only contains PLC-7240 (comparing embodiment 2), only contains PLC-7257 (n=6) (comparing embodiment 4) or only contain the ghost ratio that PLC-7257 (n=3) (comparing embodiment 5) records all low.By result, shown, the derivatized polymers with simple use with long carbochain reactive monomer (PLC-7257) formation is compared, except adding in liquid-crystal composition the orientation of the further stabilizing liquid crystal molecule of monomer with large volume side chain 154, also can be by add the monomer (M with different alkylidene group carbon chain lengths in liquid-crystal composition
1, M
2in
n value size, n is the positive integer between 0 to 11) adjust the hole order size of formations reticulated structure 152, further reach the effect (referring to Fig. 7) that stabilizing liquid crystal molecule 1 40 is orientated;
In addition, by the liquid crystal of Fig. 7, by the schematic view illustrating of stable orientations, forming the cancellated reactive monomer structure of acrylate can mix and form by having formula (I) structure of one-sided reactive group or formula (II) structure that bilateral has reactive group.Wherein, forming formula (II) structure that the base part of reticulated structure 152 should all have a reactive group by bilateral is formed; The part with large volume side chain 154 is to consist of the formula with one-sided reactive group (I) structure.In the liquid-crystal composition of one embodiment of the invention, the reactive monomer that has large volume side chain and have an one-sided reactive group accounts for the weight percent < 30% of total overall reaction monomer; In the liquid-crystal composition of another embodiment of the present invention, the reactive monomer that has large volume side chain and have an one-sided reactive group accounts for the weight percent 10%～20% of total overall reaction monomer.Under this condition, for realizing the reticulated structure of stabilizing liquid crystal, if the reactive monomer being added in liquid crystal compound is all had formula (II) the structure formation of reactive group by bilateral, can utilize different alkylidene group length (M
1, M
2in
n value size, n is the positive integer between 0 to 11) formula (II) monomer adjust the hole order size that forms reticulated structure 152; In addition, if being added on formula (II) structure that reactive monomer in liquid crystal compound all has reactive group by formula (I) structure and the bilateral of one-sided reactive group mixes while forming, in order to realize the effect of stablizing reticulated structure layer, can be expectedly, the content that forms bilateral reactive group formula (II) the structure monomer of substrate should be more than formula (I) the structure monomer only with one-sided reactive group.As can be known from the above results, with only to compare containing the made liquid-crystal display of the reactive monomer liquid-crystal composition of single kind, the made liquid-crystal display of liquid-crystal composition that utilizes the present invention to contain at least two kinds of reactive monomers has lower ghost ratio, effectively promotes thus reliability.
Although the present invention discloses with as above embodiment, yet it is not in order to limit the present invention.Any those skilled in the art without departing from the spirit and scope of the present invention, can do various changes and retouching, so the scope that protection scope of the present invention should limit with accompanying claims is as the criterion.
Claims (18)
1. for a liquid-crystal composition for liquid-crystal display, it at least comprises:
There is the anisotropic liquid crystal material of negative permittivity; With
At least two kinds of different reactive monomers,
Wherein, the weight percent that described reactive monomer structure accounts for described liquid-crystal composition is altogether 0.05% to 10%,
Wherein said at least one reactive monomer has following formula (II):
A1-B1-M1-C1-B2-C2-B3-M2-A2 (II)
Wherein A1 and A2 are identical or different, and are selected from acrylate-based, methacrylate based, vinyl, vinyloxy group and epoxy group(ing);
B1 and B3 are identical or different, and are selected from Isosorbide-5-Nitrae-phenylene, phenylbenzene, naphthalene-2,6-bis-bases and phenoxy group;
B2 representative replaces or unsubstituted Isosorbide-5-Nitrae-phenylene;
C1 and C2 are identical or different, its Dai Biao – COO –, – OCO – Huo – O –;
M1 and M2 are identical or different, its representative
n is the positive integer between 0 to 11.
2. the liquid-crystal composition for liquid-crystal display as claimed in claim 1, wherein at least one reactive monomer has one-sided reactive group, and at least another kind of reactive monomer has the reactive group of bilateral.
3. the liquid-crystal composition for liquid-crystal display as claimed in claim 1, wherein said at least one reactive monomer has following formula (I):
A1-M1-B1-M2-C1-B4 (I)
Wherein A1 is selected from acrylate-based, methacrylate based, vinyl, vinyloxy group and epoxy group(ing);
B1 is selected from Isosorbide-5-Nitrae-phenylene, phenylbenzene, naphthalene-2,6-bis-bases and phenoxy group;
B4 represents cholesteryl or benzene-oxygen-alkyl;
C1 Dai Biao – COO –, – OCO – Huo – O –;
M1 and M2 are identical or different, its representative
n is the positive integer between 0 to 11.
4. the liquid-crystal composition for liquid-crystal display as claimed in claim 2, has the monomer content of the reactive group of bilateral described in the wherein said monomer content with one-sided reactive group is less than.
5. the liquid-crystal composition for liquid-crystal display as claimed in claim 1, wherein at least two kinds of different reactive monomers have the reactive group of bilateral, and wherein at least one reactive monomer with the reactive group of bilateral has formula (II).
6. the liquid-crystal composition for liquid-crystal display as claimed in claim 1, wherein said at least two kinds of different reactive monomers comprise have following formula first monomer of (I) and the monomer with formula (II):
A1-M1-B1-M2-C1-B4 (I)
Wherein A1 is selected from acrylate-based, methacrylate based, vinyl, vinyloxy group and epoxy group(ing);
B1 is selected from Isosorbide-5-Nitrae-phenylene, phenylbenzene, naphthalene-2,6-bis-bases and phenoxy group;
B4 represents cholesteryl or benzene-oxygen-alkyl;
C1 Dai Biao – COO –, – OCO – Huo – O –;
M1 and M2 are identical or different, its representative
n is the positive integer between 0 to 11.
7. a liquid-crystal display, it at least comprises:
First substrate and second substrate through vertical orientated processing;
Liquid crystal layer, it is located between described first substrate and second substrate, and described liquid crystal layer comprises when putting on described liquid crystal layer without electric field in fact, is approximately perpendicular to the liquid crystal molecule on the main surface of described first substrate; And
The polymer being polymerized by least two kinds of different reactive monomers, it is located on described first substrate and second substrate,
Wherein at least one reactive monomer has following formula (II):
A1-B1-M1-C1-B2-C2-B3-M2-A2 (II)
Wherein A1 and A2 are identical or different, and are selected from acrylate-based, methacrylate based, vinyl, vinyloxy group and epoxy group(ing);
B1 and B3 are identical or different, and it is selected from Isosorbide-5-Nitrae-phenylene, phenylbenzene, naphthalene-2,6-bis-bases and phenoxy group;
B2 representative replaces or unsubstituted Isosorbide-5-Nitrae-phenylene;
C1 and C2 are identical or different, its Dai Biao – COO –, – OCO – Huo – O –;
M1 and M2 are identical or different, its representative
n is the positive integer between 0 to 11.
8. liquid-crystal display as claimed in claim 7, wherein at least one reactive monomer has one-sided reactive group, and at least another kind of reactive monomer has the reactive group of bilateral.
9. liquid-crystal display as claimed in claim 8, the wherein said reactive monomer with one-sided reactive group has large volume side chain, and this reactive monomer accounts for the weight percent < 30% of total overall reaction monomer.
10. liquid-crystal display as claimed in claim 7, wherein at least two kinds of different reactive monomers have the reactive group of bilateral.
11. liquid-crystal displays as claimed in claim 7, have the monomer content of the reactive group of bilateral described in the wherein said monomer content with one-sided reactive group is less than.
12. liquid-crystal displays as claimed in claim 7, wherein said polymer forms acrylic ester polymer reticulated structure, and described acrylate reticulated structure has cholesteryl side chain, benzene-oxygen-alkyl group side chain or benzene-cycloalkyl side chain.
13. liquid-crystal displays as claimed in claim 7, wherein at least one reactive monomer has following formula (I)
A1-M1-B1-M2-C1-B4 (I)
Wherein A1 is selected from acrylate-based, methacrylate based, vinyl, vinyloxy group and epoxy group(ing);
B1 is selected from Isosorbide-5-Nitrae-phenylene, phenylbenzene, naphthalene-2,6-bis-bases and oxyalkyl;
B4 represents cholesteryl or benzene-oxygen-alkyl;
C1 Dai Biao – COO –, – OCO – Huo – O –;
M1 and M2 are identical or different, its representative
n is the positive integer between 0 to 11.
14. liquid-crystal displays as claimed in claim 10, wherein at least one reactive monomer with bilateral reactive group has formula (II).
15. liquid-crystal displays as claimed in claim 7, wherein B2 has following formula (III):
R wherein
1represent alkyl or aromatic base.
16. liquid-crystal displays as claimed in claim 7, wherein said at least two kinds of different reactive monomers comprise have following formula first monomer of (I) and the monomer with formula (II):
A1-M1-B1-M2-C1-B4 (I)
Wherein A1 is selected from acrylate-based, methacrylate based, vinyl, vinyloxy group and epoxy group(ing);
B1 is selected from Isosorbide-5-Nitrae-phenylene, phenylbenzene, naphthalene-2,6-bis-bases and phenoxy group;
B4 represents cholesteryl or benzene-oxygen-alkyl;
C1 Dai Biao – COO –, – OCO – Huo – O –;
M1 and M2 are identical or different, its representative
n is the positive integer between 0 to 11.
17. liquid-crystal displays as claimed in claim 16, wherein B2 has following formula (III):
R wherein
1represent alkyl or aromatic base.
18. liquid-crystal displays as claimed in claim 7, the compound that wherein said reactive monomer selects free general formula PLC-7199, PLC-7238, PLC-7212, PLC7223, PLC7257 or PLC7240 to represent:
Wherein R represents alkyl-C
nh
2n+1, n is the positive integer between 0 to 11;
Wherein X represents linking group;
R wherein
1represent alkyl-C
nh
2n+1, n is the positive integer between 0 to 11;
R wherein
2represent alkyl-C
nh
2n+1, n is the positive integer between 0 to 11;
R wherein
3represent alkyl-C
nh
2n+1, n is the positive integer between 0 to 11;
R wherein
4represent alkyl-C
nh
2n+1, Y represents alkyl-C
nh
2n+1, A and B are identical or different, representation ring alkyl.
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| JP6083379B2 (en) * | 2011-08-04 | 2017-02-22 | 日産化学工業株式会社 | Liquid crystal aligning agent for photo-alignment treatment method, and liquid crystal alignment film using the same |
| CN102786936B (en) * | 2012-05-09 | 2015-03-25 | 深圳市华星光电技术有限公司 | Liquid crystal medium composition |
| CN103454795B (en) * | 2012-06-01 | 2016-03-02 | 群康科技(深圳)有限公司 | Display device and manufacture method thereof |
| CN104317093A (en) * | 2014-11-20 | 2015-01-28 | 京东方科技集团股份有限公司 | Liquid crystal display device and manufacturing method thereof |
| CN110928057B (en) * | 2019-12-12 | 2020-12-08 | Tcl华星光电技术有限公司 | Liquid crystal display panel |
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