CN102140351A - Liquid crystal composite for liquid crystal display - Google Patents
Liquid crystal composite for liquid crystal display Download PDFInfo
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- CN102140351A CN102140351A CN2010101090098A CN201010109009A CN102140351A CN 102140351 A CN102140351 A CN 102140351A CN 2010101090098 A CN2010101090098 A CN 2010101090098A CN 201010109009 A CN201010109009 A CN 201010109009A CN 102140351 A CN102140351 A CN 102140351A
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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 that is used for liquid-crystal display.
Background technology
It is vertical orientated that (vertically aligned, VA) the type liquid-crystal display is a kind of type of using negative type liquid crystal material and vertical orientated film.When no driving voltage was supplied, liquid crystal molecule roughly presented blank screen in the vertical direction arrangement and shows (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).With twisted nematic (Twist-Nematic, TN) liquid-crystal display is compared, the vertical alignment-type liquid crystal indicating meter can provide higher contrast and speed of response faster.Yet the vertical alignment-type liquid crystal indicating meter still has the narrow critical defect of field-of-view angle, and this causes the restricted problem of vertical alignment-type liquid crystal display application.
The performance of the field-of-view angle of known vertical alignment-type liquid crystal indicating meter can be set at a plurality of different each other directions by the orientation (orientation) with liquid crystal molecule in the pixel and improved.The open case of European patent discloses a multizone vertical orientating type (multi-domain vertically alignment, MVA) liquid-crystal display, it has the zone and adjusts member (domain regulator) adjusting 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 that the orientation system of liquid crystal comprises a plurality of directions in each pixel.Yet, when imposing specific voltage, need the long time to make liquid crystal aligning stable, 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 is to be mixed with the sealing liquid crystal of high polymer monomer in two substrates, and when being applied with voltage, two substrates will carry out polyreaction, even stop to apply voltage thus, liquid crystal still can have specific tilt angle under high molecular standard.Though 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 can't obtain ideal results (ghost ratio (Image sticking ratio, α), ghost refers to through behind the same image of long-time demonstration, when switching to other demonstration, the phenomenon that the image of front can be residual.When the ghost ratio value is high more, then represent the phenomenon of image residue of front serious more, represent that promptly the reliability of indicating meter is relatively 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 reliability thus.
For reaching above-mentioned and other purpose, 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 altogether is 0.05% to 10%.
Can also comprise light trigger (weight percent is less than 0.002, based on the ratio of liquid-crystal composition gross weight) according to liquid-crystal composition of the present invention, to quicken follow-up polyreaction.
In liquid-crystal composition of the present invention, preferred at least a 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 the 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 1, the 4-phenylene
Phenylbenzene
Naphthalene-2,6-two bases
Or phenoxy group
In formula (II), B2 representative replaces or is unsubstituted 1, the 4-phenylene; Preferably, B2 has following formula (III):
R wherein
1Represent alkyl or aromatic base.
In formula (I), B4 represents cholesteryl 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 C2 can represent-COO-,-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 a reactive monomer has one-sided reactive group (monomer that for example has formula (I)), and another kind of at least reactive monomer has the reactive group (monomer that for example has 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 that for example has 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.After when being applied with voltage, carrying out polyreaction, aforesaid two kinds of reactive monomers will aggregate into derivatized polymers in the 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 the large volume side chain and have an one-sided reactive group accounts for the monomeric weight percent of total overall reaction＜30%.
In the liquid-crystal composition of another embodiment of the present invention, the reactive monomer that has the large volume side chain and have an one-sided reactive group accounts for the monomeric weight percent 10%～20% of total overall reaction.
With compare with the made liquid-crystal display of the reactive monomer liquid-crystal composition that only contains 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 reliability thus.
Description of drawings
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 the 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 among Fig. 4 of the present invention.
The primary clustering nomenclature
110 first substrates
112 pixel electrodes
The 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
Though the present invention can show as multi-form embodiment, but what reach explanation hereinafter shown in the accompanying drawing is the preferred embodiments of the present invention, and please understand the example of the present invention that is thought of as disclosed herein, and be not to be intended to the present invention is limited in diagram and/or the 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.Be sealed in two between vertical orientated treatment substrate the time when having the anisotropic liquid crystal material of negative permittivity, the liquid crystal molecule that described liquid crystal material comprised is approximately perpendicular to substrate surface roughly not having when electric field is applied to this liquid crystal layer.
The weight percent that described reactive monomer accounts for described liquid-crystal composition altogether is 0.05% to 10%.When the reactive monomer weight percent less than 0.05 the time, its formed polymer is not enough to its orientation of standard stable, that reproducibility is arranged when driving liquid crystal molecule; When the reactive monomer weight percent greater than 10 the time, anchorage force is too high between liquid crystal molecule and the derivatized polymers, easily produces the too high shortcoming of operating voltage.This weight percent refers to the ratio based on the liquid-crystal composition gross weight.
Also can comprise light trigger (weight percent is less than 0.002, based on the ratio of liquid-crystal composition gross weight) according to liquid-crystal composition of the present invention, to quicken follow-up polyreaction.Any light trigger that can form free radical when imposing suitable radiation all is applicable to the present invention.The general light trigger that uses with helium cadmium laser (He-Cd Laser) (as irradiating source) is phenyl methyl ketone compounds (acetophenone).
In liquid-crystal composition of the present invention, preferred at least a 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 the 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 1, the 4-phenylene
Phenylbenzene
Naphthalene-2,6-two bases
Or phenoxy group
In formula (II), B2 can represent and replace or unsubstituted 1, the 4-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 C2 can represent-COO-,-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 a reactive monomer has one-sided reactive group (monomer that for example has formula (I)), and another kind of at least reactive monomer has the reactive group (monomer that for example has 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 that for example has formula (II)) of bilateral.
It is as follows to can be used for the reactive monomer with formula (I) or formula (II) of the present invention, 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 its reliability thus.
See also Fig. 1, MVA liquid-crystal display according to the present invention mainly comprises first substrate 110 and second substrate 120.Can be respectively equipped with polaroid (not being shown among the figure) outside first substrate 110 and second substrate 120, in order to polarization of lightization.First substrate 110 can be provided with backlight (not being shown among the 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.Can be provided with many brake cable roads (gate line) and data circuit (data lines) (not being shown among the figure) that are arranged on first substrate 110.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 among the 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 be provided with the auxiliary capacitor circuit (not being shown among the figure) of the individual wired parallel with the brake cable road in addition.Second substrate 120 can be provided with for example light shield layer (BM) (not being shown among the figure) of a smooth shading array; A plurality of chromatic filter layers (not being shown among the 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.Generally be provided with distance piece (spacer) (not being shown among the figure) between first and second substrate 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 the zone, 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 the wide viewing angle performance thus.The surface of first substrate 110 and second substrate 120 is vertically oriented processing, and vertical alignment layer 130 for example is set.
Please again referring to Fig. 1, first substrate 110 with after second substrate 120 combines, is sealed in 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 and forms liquid crystal layer therebetween.Specifically, earlier first substrate 110 is alignd mutually with second substrate 120, and spaced apart with about 4 microns distance, utilize Resins, epoxy to combine in its edge again.Then, the liquid crystal utensil that the substrate and after this combination is filled with foregoing liquid crystal composition of the present invention places a vacuum chamber, and at this moment, the crack was in vacuum state between the substrate after this combination was interior.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 suction gradually via filling mouth.In addition, the quick packing technique that also can use developed recently to go out, promptly so-called liquid crystal drop following formula (One Drop Fill) technology.In this technology, substrate accommodates the liquid-crystal composition that drop is inserted with before another substrate combines.
As shown in Figure 1, when roughly not having electric field and apply, liquid crystal molecule 140 is approximately perpendicular to first substrate 110 and second substrate, 120 surfaces.When imposing one when preestablishing voltage, as shown in Figure 2, near the slit 112a of pixel electrode 112 (electrode edge), there is the electric field (shown in Fig. 2 dotted line) that favours this substrate surface to produce.The tilting electric field that produces 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 preestablishes voltage, be located in the liquid crystal layer of 120 of first substrate 110 and second substrates with UV-light (shown in arrow among Fig. 3) irradiation.UV-light can be from the high pressure mercury vapour lamp of a UV curing apparatus or helium cadmium laser (not being shown among the figure).As shown in Figure 3, the interior original two kinds of reactive monomers of liquid crystal layer this moment will aggregate into an acrylic ester polymer reticulated structure 152 in the substrate both sides respectively, 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 the liquid crystal molecule standard substrate-side can be utilized the tilt angle and the orientation of liquid crystal molecule 140 in the theoretical stabilized baseplate of continuous elastomeric thus.For example shown in Figure 4, the orientation of this liquid crystal is divided into two different directions, obtains the wide viewing angle performance thus.
In the liquid-crystal composition of one embodiment of the invention, the reactive monomer that has the large volume side chain and have an one-sided reactive group accounts for the monomeric weight percent of total overall reaction＜30%; In the liquid-crystal composition of another embodiment of the present invention, the reactive monomer that has the large volume side chain and have an one-sided reactive group accounts for the monomeric weight percent 10%～20% of total overall reaction.
Fig. 5 to 6 is that the liquid crystal display substrate surface has the cancellated SEM scintigram of polymer according to an embodiment of the invention.What deserves to be mentioned is that UV-irradiation can make monomer reaction and generate have the polymer projection reticulated structure of (Fig. 5,6).As shown in the figure, the polymer projection can be linear, circular or other different geometries, it is different and different that its geometrical shape is looked preparation process.
Below concrete example be that it only is illustrative should being considered as, and is not in order to limit the other parts of this exposure in any situation.If further do not set forth, believe those skilled in the art can based on this narration and make full use of the present invention.
Comparing embodiment
Make liquid-crystal display with the liquid-crystal composition that only contains the single kind reactive monomer
With various reactive monomer structures as shown in Table 1, respectively with commercially available liquid crystal material, and the mixing of commercially available light trigger, obtain 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 when two substrates is applied with voltage, carries out polyreaction.With the liquid-crystal display that makes carry out reliability test (50 ℃/120hrs/12V/60Hz) after, the ghost ratio that it records (Imagesticking rate, α), detailed 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 following for some time of picture in black and white.Then, again the brightness value of display picture is switched in the middle of 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.The α value is more little, and (difference of β-γ) is more little, and reliability is good more in representative.
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
Make liquid-crystal display with the liquid-crystal composition that contains at least two kinds of reactive monomers
With various reactive monomer combinations as shown in Table 2, respectively with commercially available liquid crystal material, and the mixing of commercially available light trigger, obtain 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 when two substrates is applied with voltage, carries out polyreaction.With the liquid-crystal display that makes carry out reliability test (50 ℃/120hrs/12V/60Hz) after, the ghost ratio that it records (Imagesticking rate, α), detailed as shown in the formula) as shown in Table 2.
Table two
| Embodiment | The 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 |
Embodiment 1 and 2 employed liquid-crystal compositions contain the reactive monomer (being PLC-7238) of formula (I) and the reactive monomer (being PLC-7223) of formula (II), and 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.Show that by the result having the derivatized polymers that long carbochain reactive monomer (PLC-7223) forms with simple use 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 have preferred reliability.
Embodiment 3 to 5 employed liquid-crystal compositions contain the reactive monomer (being PLC-7199) of formula (I) and the reactive monomer (being PLC-7223) of 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 of the side chain with class liquid crystal molecule with liquid crystal molecule, further stabilizing liquid crystal molecular orientation and have preferred reliability.
Embodiment 6 and 7 employed liquid-crystal compositions contain the reactive monomer (being PLC-7223 and PLC-7240) of two kinds of formulas (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-7240 (comparing embodiment 2) records, learn by the result, formed derivatized polymers is because of connecing structure to the similar side chain with large volume of embodiment 1 and 2, and then obtains preferred reliability.
Embodiment 8 and 9 employed liquid-crystal compositions contain the reactive monomer of three kinds of formulas (II), wherein, embodiment 8 and 9 employed liquid-crystal compositions comprise 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.Show by the result, the derivatized polymers that has long carbochain reactive monomer (PLC-7257) formation with simple use is compared, except that in liquid-crystal composition, adding the orientation of the further stabilizing liquid crystal molecule of the monomer with large volume side chain 154, also can be by in liquid-crystal composition, adding monomer (M with different alkylidene group carbon chain lengths
1, M
2In
N value size, n is the positive integer between 0 to 11) adjust the hole order size of institute's formation reticulated structure 152, further reach the effect (referring to Fig. 7) that stabilizing liquid crystal molecule 1 40 is orientated;
In addition, be stabilized the schematic view illustrating of orientation, constitute the cancellated reactive monomer structure of acrylate and can mix by formula (II) structure that (I) structure of the formula with one-sided reactive group or bilateral have a reactive group and constitute by the liquid crystal of Fig. 7.Wherein, the base part that constitutes reticulated structure 152 should be made of formula (II) structure that bilateral all has a reactive group; Part with large volume side chain 154 then is to be made 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 the large volume side chain and have an one-sided reactive group accounts for the monomeric weight percent of total overall reaction＜30%; In the liquid-crystal composition of another embodiment of the present invention, the reactive monomer that has the large volume side chain and have an one-sided reactive group accounts for the monomeric weight percent 10%～20% of total overall reaction.Under this condition,,, then can utilize different alkylidene group length (M if the reactive monomer that is added in the liquid crystal compound is made of formula (II) structure that bilateral all has reactive group for realizing the reticulated structure of stabilizing liquid crystal
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 the reactive monomer in the liquid crystal compound all has reactive group by formula (I) structure and the bilateral of one-sided reactive group mixes when constituting, in order to realize stablizing the effect of reticulated structure layer, can be expectedly, the monomeric content of bilateral reactive group formula (II) structure of forming substrate should be more than the formula that only has one-sided reactive group (I) structure monomer.As can be known from the above results, with compare with the made liquid-crystal display of the reactive monomer liquid-crystal composition that only contains 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 reliability thus.
Though 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 can do various changes and retouching without departing from the spirit and scope of the present invention, so protection scope of the present invention should be as the criterion with accompanying claims restricted portion.
Claims (20)
1. liquid-crystal composition that is used for liquid-crystal display, it comprises at least:
Has the anisotropic liquid crystal material of negative permittivity; With
At least two kinds of different reactive monomers,
Wherein, to account for the weight percent of described liquid-crystal composition altogether be 0.05% to 10% to described reactive monomer structure.
2. the liquid-crystal composition that is used for liquid-crystal display as claimed in claim 1, wherein at least a reactive monomer has one-sided reactive group, and another kind of at least reactive monomer has the reactive group of bilateral.
3. the liquid-crystal composition that is used for liquid-crystal display as claimed in claim 1, wherein said at least a 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 1,4-phenylene, phenylbenzene, naphthalene-2,6-two bases and phenoxy group;
B4 represents cholesteryl or benzene-oxygen-alkyl;
C1 representative-COO-,-OCO-or-O-;
The M1 representative
N is the positive integer between 0 to 11.
4. the liquid-crystal composition that is used for liquid-crystal display as claimed in claim 1, wherein said at least in addition-kind of a 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 1,4-phenylene, phenylbenzene, naphthalene-2, and 6-two bases and phenoxy group:
B2 representative replaces or is unsubstituted 1, the 4-phenylene;
C1 and C2 are identical or different, its representative-COO-,-OCO-or-O-;
M1 and M2 are identical or different, its representative
N is the positive integer between 0 to 11.
5. the liquid-crystal composition that is used for liquid-crystal display as claimed in claim 2, wherein said monomer content with one-sided reactive group are less than described monomer content with reaction monomers group of bilateral.
6. the liquid-crystal composition that is used 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 a reactive monomer with reactive group of bilateral 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 1,4-phenylene, phenylbenzene, naphthalene-2,6-two bases and phenoxy group;
B2 representative replaces or is unsubstituted 1, the 4-phenylene;
C1 and C2 are identical or different, its representative-COO-,-OCO-or-O-;
M1 and M2 are identical or different, its representative
N is the positive integer between 0 to 11.
7. the liquid-crystal composition that is used 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 second monomer with following formula (II):
A1-M1-B1-M2-C1-B4 (I)
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 1,4-phenylene, phenylbenzene, naphthalene-2,6-two bases and phenoxy group;
B2 representative replaces or is unsubstituted 1, the 4-phenylene;
B4 represents cholesteryl or benzene-oxygen-alkyl;
C1 and C2 are identical or different, its representative-COO-,-OCO-or-O-;
M1 and M2 are identical or different, its representative
N is the positive integer between 0 to 11.
8. liquid-crystal display, it comprises at least:
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 not having electric field in fact and put on described liquid crystal layer, is approximately perpendicular to the liquid crystal molecule on the main surface of described first substrate; And
By the polymer that at least two kinds of different reactive monomers are polymerized, it is located on described first substrate and second substrate.
9. liquid-crystal display as claimed in claim 8, wherein at least a reactive monomer has one-sided reactive group, and another kind of at least reactive monomer has the reactive group of bilateral.
10. liquid-crystal display as claimed in claim 9, wherein said reactive monomer with one-sided reactive group has the large volume side chain, and this reactive monomer accounts for the monomeric weight percent of total overall reaction＜30%.
11. liquid-crystal display as claimed in claim 8, wherein at least two kinds of different reactive monomers have the reactive group of bilateral.
12. liquid-crystal display as claimed in claim 8, wherein said monomer content with one-sided reactive group are less than described monomer content with reaction monomers group of bilateral.
13. liquid-crystal display as claimed in claim 8, wherein said polymer forms the 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.
14. liquid-crystal display as claimed in claim 8, wherein at least a 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 1,4-phenylene, phenylbenzene, naphthalene-2,6-two bases and oxyalkyl;
B4 represents cholesteryl or benzene-oxygen-alkyl;
C1 representative-COO-,-OCO-or-O-;
The M1 representative
N is the positive integer between 0 to 11.
15. liquid-crystal display as claimed in claim 8, wherein at least a 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 1,4-phenylene, phenylbenzene, naphthalene-2,6-two bases and phenoxy group;
B2 representative replaces or is unsubstituted 1, the 4-phenylene;
C1 and C2 are identical or different, its representative-COO-,-OCO-or-O-;
M1 and M2 are identical or different, its representative
N is the positive integer between 0 to 11.
16. liquid-crystal display as claimed in claim 11, wherein at least a reactive monomer with bilateral reactive group 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 1,4-phenylene, phenylbenzene, naphthalene-2,6-two bases and phenoxy group;
B2 representative replaces or is unsubstituted 1, the 4-phenylene;
C1 and C2 are identical or different, its representative-COO-,-OCO-or-O-;
M1 and M2 are identical or different, its representative
N is the positive integer between 0 to 11.
17. liquid-crystal display as claimed in claim 15, wherein B2 has following formula (III):
R wherein
1Represent alkyl or aromatic base.
18. liquid-crystal display as claimed in claim 8, wherein said at least two kinds of different reactive monomers comprise have following formula first monomer of (I) and second monomer with following formula (II):
A1-M1-B1-M2-C1-B4 (I)
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 1,4-phenylene, phenylbenzene, naphthalene-2,6-two bases and phenoxy group;
B2 representative replaces or is unsubstituted 1, the 4-phenylene;
B4 represents cholesteryl or benzene-oxygen-alkyl;
C1 and C2 are identical or different, its representative-COO-,-OCO-or-O-;
M1 and M2 are identical or different, its representative
N is the positive integer between 0 to 11.
19. liquid-crystal display as claimed in claim 18, wherein B2 has following formula (III):
R wherein
1Represent alkyl or aromatic base.
20. liquid-crystal display as claimed in claim 8, wherein said reactive monomer is selected from the compound of being represented by general formula PLC-7199, PLC-7238, PLC-7212, PLC7223, PLC7257 or PLC7240:
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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| CN102786936A (en) * | 2012-05-09 | 2012-11-21 | 深圳市华星光电技术有限公司 | Liquid crystal medium composition |
| CN103454795A (en) * | 2012-06-01 | 2013-12-18 | 群康科技(深圳)有限公司 | Display device and method for manufacturing same |
| CN103718093A (en) * | 2011-08-04 | 2014-04-09 | 日产化学工业株式会社 | Liquid crystal orientation liquid for light orientation processing technique, and liquid crystal orientation film employing same |
| CN104730752A (en) * | 2014-11-20 | 2015-06-24 | 京东方科技集团股份有限公司 | Liquid crystal display device and production method thereof |
| CN110928057A (en) * | 2019-12-12 | 2020-03-27 | Tcl华星光电技术有限公司 | Liquid crystal display panel |
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|---|---|
| CN102140351B (en) | 2014-09-03 |
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