CN102517035B - Blue phase liquid crystal composition and blue phase liquid crystal panel - Google Patents
Blue phase liquid crystal composition and blue phase liquid crystal panel Download PDFInfo
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- CN102517035B CN102517035B CN201110359414.XA CN201110359414A CN102517035B CN 102517035 B CN102517035 B CN 102517035B CN 201110359414 A CN201110359414 A CN 201110359414A CN 102517035 B CN102517035 B CN 102517035B
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 85
- 239000000126 substance Substances 0.000 claims abstract description 89
- 150000001875 compounds Chemical class 0.000 claims abstract description 44
- 239000002019 doping agent Substances 0.000 claims abstract description 25
- 125000004432 carbon atom Chemical group C* 0.000 claims abstract description 20
- 239000000178 monomer Substances 0.000 claims abstract description 18
- 125000003545 alkoxy group Chemical group 0.000 claims abstract description 10
- 125000000217 alkyl group Chemical group 0.000 claims abstract description 10
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 claims abstract description 4
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims abstract description 4
- 239000000758 substrate Substances 0.000 claims description 23
- 229910052799 carbon Inorganic materials 0.000 claims description 16
- 239000003999 initiator Substances 0.000 claims description 8
- FDPIMTJIUBPUKL-UHFFFAOYSA-N pentan-3-one Chemical compound CCC(=O)CC FDPIMTJIUBPUKL-UHFFFAOYSA-N 0.000 claims description 4
- NAWXUBYGYWOOIX-SFHVURJKSA-N (2s)-2-[[4-[2-(2,4-diaminoquinazolin-6-yl)ethyl]benzoyl]amino]-4-methylidenepentanedioic acid Chemical compound C1=CC2=NC(N)=NC(N)=C2C=C1CCC1=CC=C(C(=O)N[C@@H](CC(=C)C(O)=O)C(O)=O)C=C1 NAWXUBYGYWOOIX-SFHVURJKSA-N 0.000 claims 1
- 230000000052 comparative effect Effects 0.000 description 6
- 230000005684 electric field Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 238000010189 synthetic method Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000003786 synthesis reaction Methods 0.000 description 2
- KWVGIHKZDCUPEU-UHFFFAOYSA-N 2,2-dimethoxy-2-phenylacetophenone Chemical compound C=1C=CC=CC=1C(OC)(OC)C(=O)C1=CC=CC=C1 KWVGIHKZDCUPEU-UHFFFAOYSA-N 0.000 description 1
- GEYYCMNNGTULHL-UHFFFAOYSA-N CCCC1=CC=C(C=C1)CC#CCC2=CC=C(C=C2)OCC Chemical group CCCC1=CC=C(C=C1)CC#CCC2=CC=C(C=C2)OCC GEYYCMNNGTULHL-UHFFFAOYSA-N 0.000 description 1
- 241001062009 Indigofera Species 0.000 description 1
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 125000002534 ethynyl group Chemical group [H]C#C* 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 125000005429 oxyalkyl group Chemical group 0.000 description 1
- 230000010415 tropism Effects 0.000 description 1
- 230000004304 visual acuity Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- Liquid Crystal (AREA)
Abstract
A blue phase liquid crystal composition includes at least one host liquid crystal compound, a host dopant, a chiral dopant, a reactive monomer, and a photoinitiator. The host liquid crystal compound has chemical formula (1):wherein A, B, C represents benzene ring or cyclohexane, R1、R2Respectively represent a substituted or unsubstituted alkyl group having 1 to 12 carbon atoms, or a substituted or unsubstituted alkoxy group having 1 to 12 carbon atoms, and n represents 0 or 1. The main dopant includes at least one of chemical formula and chemical formula (3):the chiral dopants include formula (4) and formulae (5) to (5)One of them is as follows:the reactive monomer includes at least one of chemical formula (6) and chemical formula (7):wherein R, R' represents a substituted or unsubstituted alkyl group having 1 to 12 carbon atoms, or a substituted or unsubstituted alkoxy group having 1 to 12 carbon atoms, respectively.
Description
[technical field]
The present invention relates to a kind of blue-phase liquid crystal composition and blue-phase liquid crystal panel.
[background technology]
Along with showing the flourish of science and technology, consumption is popular more and more higher for the requirement of indicating meter image display quality.The popular specification except the resolving power to indicating meter (resolution), contrast (contrast ratio), visual angle (viewing angle), gray-scale inversion (grey level inversion), fullness of shade (color saturation) of consumption requires to some extent, the specification requirement of the time of response (response time) to indicating meter also day by day improves.
In order to comply with the popular demand of consumption, the numerous and confused exploitation that drops into blue phase (blue phase) liquid-crystal display with rapid answer characteristic of indicating meter relevant enterprise.
But it is that driving voltage is too high that current blue phase liquid crystal is applied to existing shortcoming on indicating meter.Therefore the driving voltage that, how to reduce blue phase liquid crystal display is to be badly in need of one of problem being overcome.
[summary of the invention]
The invention provides a kind of blue-phase liquid crystal composition and blue-phase liquid crystal display panel, the composition of described blue-phase liquid crystal composition can reduce the required driving voltage of blue-phase liquid crystal display panel.
The present invention proposes a kind of blue-phase liquid crystal composition, and it comprises at least one host liquid crystal compound, main hotchpotch, chiral dopant, reactive monomer and light initiator.Host liquid crystal compound has chemical formula (1):
Wherein, A, B, C represent respectively phenyl ring or hexanaphthene, R
1, R
2represent respectively there is 1 replacement to twelve carbon atom or the alkyl being unsubstituted or have 1 to the replacement of twelve carbon atom or the alkoxyl group being unsubstituted, and n represents 0 or 1.Main hotchpotch comprise chemical formula (2) and chemical formula (3) at least one of them:
Chiral dopant comprise chemical formula (4) and chemical formula (5) at least one of them:
Reactive monomer comprise chemical formula (6) and chemical formula (7) at least one of them:
Wherein R, R ' represent respectively to have 1 replacement to twelve carbon atom or the alkyl being unsubstituted or have 1 to the replacement of twelve carbon atom or the alkoxyl group being unsubstituted.
The present invention separately proposes a kind of blue-phase liquid crystal display panel, and it comprises first substrate, second substrate and blue phase liquid crystal layer.First substrate and second substrate are oppositely arranged, and blue phase liquid crystal layer is between first substrate and second substrate, and wherein blue phase liquid crystal layer comprises blue-phase liquid crystal composition as above.
Based on above-mentioned, blue-phase liquid crystal composition of the present invention, except host liquid crystal compound, has also comprised the combination of specific main hotchpotch and chiral dopant.In the time that display panels adopts this blue-phase liquid crystal composition as display medium, described display panels can drive blue phase liquid crystal with lower driving voltage.
For above-mentioned feature and advantage of the present invention can be become apparent, special embodiment below, and coordinate accompanying drawing to be described in detail below.
[accompanying drawing explanation]
Fig. 1 is the diagrammatic cross-section of blue-phase liquid crystal display panel according to an embodiment of the invention.
Fig. 2 is the voltage of blue-phase liquid crystal display panel and the graph of a relation of penetration coefficient.
[main description of reference numerals]
100: first substrate
200: second substrate
300: blue phase liquid crystal layer
[embodiment]
Fig. 1 is the diagrammatic cross-section of blue-phase liquid crystal display panel according to an embodiment of the invention.Please refer to Fig. 1, the blue-phase liquid crystal display panel of the present embodiment comprises first substrate 100, second substrate 200 and blue phase liquid crystal layer 300.
Blue phase liquid crystal layer 300 is between first substrate 100 and second substrate 200.Particularly, the blue-phase liquid crystal composition comprising in blue phase liquid crystal layer 300 can reduce the required driving voltage of blue-phase liquid crystal display panel.In general, liquid crystal indigo plant refers to the three-dimensional cubic structure of optical isotropy mutually.Conventionally, blue phase molecule spatially presents two distortion columnar arrangement, and therefore blue phase liquid crystal molecule, in arranging along screw shaft X distortion rotation, also participates in arranging along the distortion rotation of screw shaft Y.And blue phase liquid crystal to arrange from macroscopic be the liquid crystal arrangement form with cube (cubic) structure cell cube of composition (unit cell).Therefore, under the condition without electric field induction, liquid crystal molecule is to present the optical characteristics that waits tropism (isotropic like), and is to present black state (normally black) while importing Polarizer observation.Typical case, can utilize transverse electric field to drive (IPS) electrode structure blue phase liquid crystal of tending to act, and makes liquid crystal produce birefringence, and then produces the effect of grating switch.
About being described in detail as follows of the blue-phase liquid crystal composition in blue phase liquid crystal layer 300.
The blue-phase liquid crystal composition of the present embodiment comprises at least one host liquid crystal compound, main hotchpotch, chiral dopant, reactive monomer and light initiator.
Described at least one host liquid crystal compound has chemical formula (1):
Wherein, A, B, C represent respectively phenyl ring or hexanaphthene, R
1, R
2represent respectively to there is 1 replacement to twelve carbon atom or the alkyl being unsubstituted or have 1 to the replacement of twelve carbon atom or the alkoxyl group being unsubstituted (oxaalkyl or oxyalkyl), and n represents 0 or 1.
According to the present embodiment, the content of above-mentioned host liquid crystal compound in blue-phase liquid crystal composition is about 30～95wt%.
In general, described host liquid crystal compound can be formed by plurality of liquid crystals compound combination.For instance, described host liquid crystal compound can comprise the compound of chemical formula (8)～chemical formula (13).
Wherein, R, R ' represent respectively to have 1 replacement to twelve carbon atom or the alkyl being unsubstituted or have 1 to the replacement of twelve carbon atom or the alkoxyl group being unsubstituted.
Preferably, described host liquid crystal compound can be formed by chemical formula (1-1) to the compound combination of chemical formula (1-10).
For instance, the liquid crystal compound (SLC1717) of being produced by Hebei China Shijiazhuang Chengzhi Yonghua Display Materials Co., Ltd. is the compound of the chemical formula (1-1) that comprised about 14.5wt%, the compound of the chemical formula (1-2) of about 13.8wt%, the compound of the chemical formula (1-3) of about 12.6wt%, the compound of the chemical formula (1-4) of about 11.6wt%, the compound of the chemical formula (1-5) of about 11.1wt%, the compound of the chemical formula (1-6) of about 17.7wt%, the compound of the chemical formula (1-7) of about 3.1wt%, the compound of the chemical formula (1-8) of about 5.3wt%, the compound of the compound of the chemical formula (1-9) of about 4.8wt% and the chemical formula (1-10) of about 5.5wt%.
Main hotchpotch comprise chemical formula (2) and chemical formula (3) at least one of them:
The above-mentioned main hotchpotch with chemical formula (2) be abbreviated as C5OF2.The above-mentioned main hotchpotch with chemical formula (3) be abbreviated as C3TOC2.
The synthetic method of the above-mentioned main hotchpotch (C5OF2) with chemical formula (2) is as follows, but the invention is not restricted to this.
The synthetic method of the above-mentioned main hotchpotch (C3TOC2) with chemical formula (3) is as follows, but the invention is not restricted to this.
According to one embodiment of the invention, the content of the above-mentioned main hotchpotch (C5OF2) with chemical formula (2) is about 5～20wt%, and the content of the above-mentioned main hotchpotch (C3TOC2) with chemical formula (3) is about 5～20wt%.The above-mentioned main hotchpotch (C3TOC2) that has the main hotchpotch (C5OF2) of chemical formula (2) and have a chemical formula (3) can increase dielectric anisotropy and the optical anisotropy of blue-phase liquid crystal composition.Preferably, described main hotchpotch content is about 5～20wt%, and the compound combination that comprises chemical formula (2) and chemical formula (3) forms.
Chiral dopant comprise chemical formula (4) and chemical formula (5) at least one of them:
The above-mentioned chiral dopant with chemical formula (4) be abbreviated as CB15F2.The above-mentioned chiral dopant with chemical formula (5) be abbreviated as ISOROBA.
In one embodiment, the synthesis mode of the above-mentioned chiral dopant (CB15F2) with chemical formula (4) is as follows, but the invention is not restricted to this.
The synthesis mode of the above-mentioned chiral dopant (ISOROBA) with chemical formula (5) is as follows, but the invention is not restricted to this.
According to the present embodiment, the content of the above-mentioned chiral dopant (CB15F2) with chemical formula (4) is about 5～20wt%, and the content with the chiral dopant (ISOROBA) of chemical formula (5) is about 5～10wt%.Preferably, described chiral dopant content is about 5～20wt%, and the compound combination that comprises chemical formula (4) and chemical formula (5) forms.
Reactive monomer comprise chemical formula (6) and chemical formula (7) at least one of them:
Wherein, R, R ' represent respectively to have 1 replacement to twelve carbon atom or the alkyl being unsubstituted or have 1 to the replacement of twelve carbon atom or the alkoxyl group being unsubstituted.
The above-mentioned reactive monomer with chemical formula (6) be abbreviated as TEPTA.The above-mentioned reactive monomer with chemical formula (7) be abbreviated as C6M.
The above-mentioned reactive monomer with chemical formula (6) can be described as again 1-(4-propyl group benzyl)-2-(4-ethoxy benzyl) acetylene (1-(4-propylbenzyl)-2-(4 '-ethoxybenzyl)-acetylene), it is for example: can be buied by Hebei China Shijiazhuang Si Diyanuo Fine Chemical Co., Ltd, but the invention is not restricted to this.
The synthetic method of the above-mentioned reactive monomer (C6M) with chemical formula (7) is as follows, but the invention is not restricted to this.
According to the present embodiment, the content of the above-mentioned reactive monomer (TEPTA) with chemical formula (6) is about 0～15wt%, and the content with the reactive monomer (C6M) of chemical formula (7) is about 0～15wt%.Preferably, described reactive monomer content is about 0～15wt%, and comprising chemical formula (6) forms with the compound combination of chemical formula (7), and particularly, in the time having the reactive monomer of chemical formula (6) and have the reactive monomer of chemical formula (7) simultaneously, their content is 0wt% when different.
In addition, light initiator comprises 2,2-dimethoxy-1,2-phenylbenzene ethyl ketone (2,2-dimethoxy-1,2-diphenyl-ethanone, DMPAP).In addition, according to the present embodiment, the content of described smooth initiator is about 0.01～0.5wt%.
Example
Composition and the content ratio of the blue-phase liquid crystal composition of example 1～21 in table 1, are listed.The host liquid crystal compound using in the blue-phase liquid crystal composition of example 1～21 is all liquid crystal compound (SLC1717, for example: produced by Hebei China Shijiazhuang Chengzhi Yonghua Display Materials Co., Ltd.), main hotchpotch is C3TOC2 and C5OF2, chiral dopant is CB15F2 and ISO6OBA, reactive monomer is C6M and TEPTA, and light initiator is DMPAP.
Table 1
The blue-phase liquid crystal composition of above-mentioned example 1～21 is flow into respectively to display panels, and measure its photoelectric characteristic, shown in measuring result table 2.As shown in Table 2, the saturation voltage of example 5,8,9 is obviously on the low side, thereby the composition of the blue-phase liquid crystal composition of example 5,8,9 and be relatively example preferably, but the invention is not restricted to this.
Table 2
In addition, in following table 3, the host liquid crystal compound using in example 8, example 15 and comparative example is all liquid crystal compound (SLC1717, for example: produced by Hebei China Shijiazhuang Chengzhi Yonghua Display Materials Co., Ltd.).Particularly, main hotchpotch (C3TOC2, C5OF2) and chiral dopant (CB15F2, ISO6OBA) in example 8, have been comprised.In example 15, do not add and become owner of hotchpotch but added chiral dopant (CB15F2, ISO6OBA).Comparative example does not add becomes owner of hotchpotch and has only added a kind of chiral dopant (ISO6OBA).
Table 3
The blue-phase liquid crystal composition of above-mentioned example 8, example 15 and comparative example is flow into display panels afterwards and measures its photoelectric characteristic, and result as shown in Figure 2.Please refer to Fig. 2, transverse axis represents voltage (V), and the longitudinal axis represents penetration coefficient (%), and A represents the measurement curve of comparative example, and B represents the measurement curve of example 15, and C represents the measurement curve of example 8.As shown in Figure 2, if take comparative example (A) as benchmark, example 15 (B) has added chiral dopant (CB15F2) and has obviously improved significantly for photoelectric characteristic afterwards.Example 8 (C) has added chiral dopant (CB15F2) and main hotchpotch (C3TOC2, C5OF2) afterwards than comparative example, and photoelectric characteristic has further to be improved.
In sum, blue-phase liquid crystal composition of the present invention, except host liquid crystal compound, has also comprised the combination of specific main hotchpotch and chiral dopant.In the time that display panels adopts this blue-phase liquid crystal composition as display medium, described display panels can drive blue phase liquid crystal with lower driving voltage.
Although the present invention discloses as above with example, so it is not in order to limit the present invention, any the technical staff in the technical field of the invention, and without departing from the spirit and scope of the present invention, Ying Kezuo is change and retouching arbitrarily.Therefore the scope that, protection scope of the present invention should limit with appended claims is as the criterion.
Claims (5)
1. a blue-phase liquid crystal composition, comprising:
At least one host liquid crystal compound, it has chemical formula (1);
Wherein, A, B, C represent respectively phenyl ring or hexanaphthene, R
1, R
2represent respectively there is 1 replacement to twelve carbon atom or the alkyl being unsubstituted or have 1 to the replacement of twelve carbon atom or the alkoxyl group being unsubstituted, and n represents 0 or 1;
Main hotchpotch, it comprises chemical formula (2) and chemical formula (3);
Chemical formula (2) chemical formula (3)
Chiral dopant, it comprises chemical formula (4) and chemical formula (5);
Chemical formula (4) chemical formula (5)
Reactive monomer, it comprise chemical formula (6) and chemical formula (7) at least one of them,
Chemical formula (6)
Chemical formula (7)
Wherein, R, R ' represent respectively to have 1 replacement to twelve carbon atom or the alkyl being unsubstituted or have 1 to the replacement of twelve carbon atom or the alkoxyl group being unsubstituted; And
Light initiator,
Wherein the content of this host liquid crystal compound is 30～95wt%; In this main hotchpotch, the content of the compound of chemical formula (2) is 5～20wt%, and the content of the compound of chemical formula (3) is 5～20wt%; The content of the compound of chemical formula in this chiral dopant (4) is 5～20wt%, and the content 5～10wt% of the compound of chemical formula (5); The content of the compound of chemical formula in this reactive monomer (6) is 0～15wt%, the content of the compound of chemical formula (7) is 0～15wt%, and the content of (7) two kinds of compounds of chemical formula (6) and chemical formula is 0wt% when different; And the content of this light initiator is 0.01～0.5wt%.
2. blue-phase liquid crystal composition as claimed in claim 1, wherein this light initiator comprises 2,2-dimethoxy-1,2-phenylbenzene ethyl ketone.
3. blue-phase liquid crystal composition as claimed in claim 1, wherein this host liquid crystal compound comprises:
Chemical formula (8) chemical formula (9)
Chemical formula (10) chemical formula (11)
Chemical formula (12) chemical formula (13)
Wherein, R, R ' represent respectively to have 1 replacement to twelve carbon atom or the alkyl being unsubstituted or have 1 to the replacement of twelve carbon atom or the alkoxyl group being unsubstituted.
4. blue-phase liquid crystal composition as claimed in claim 3, wherein this host liquid crystal compound comprises:
5. a blue-phase liquid crystal display panel, comprising:
First substrate;
Second substrate; And
Blue phase liquid crystal layer, between this first substrate and this second substrate, wherein this blue phase liquid crystal layer comprises blue-phase liquid crystal composition as claimed in claim 1.
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| TW100136110A TWI435929B (en) | 2011-10-05 | 2011-10-05 | Blue phase liquid crystal composition and blue phase liquid crystal display panel |
| TW100136110 | 2011-10-05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9567523B2 (en) * | 2013-05-31 | 2017-02-14 | Boe Technology Group Co., Ltd. | Blue phase liquid crystal composite material and liquid crystal display comprising the same |
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| CN102827615B (en) * | 2012-08-30 | 2014-12-24 | 昆山龙腾光电有限公司 | Biphenyl acetylene blue phase liquid crystal composite material and production method |
| CN103361080B (en) * | 2013-07-12 | 2015-07-01 | 石家庄诚志永华显示材料有限公司 | Blue phase liquid crystal composition |
| CN104130783B (en) * | 2014-07-23 | 2015-10-07 | 北京大学 | A kind of have the liquid-crystal composition of smectic phase to chirality nematic Phase |
| CN104263384B (en) * | 2014-09-03 | 2016-05-18 | 石家庄诚志永华显示材料有限公司 | A kind of polymer stabilizing blue-phase liquid crystal composition and preparation method thereof and application |
| CN104479691B (en) * | 2014-12-05 | 2016-09-07 | 京东方科技集团股份有限公司 | Manufacture the composition of oriented layer, display base plate and manufacture method thereof and display floater |
| CN106146527A (en) * | 2015-04-24 | 2016-11-23 | 中国科学院大连化学物理研究所 | A kind of preparation method of dicarboxylic acids isosorbide ester plasticiser |
| CN106635060B (en) * | 2016-12-16 | 2018-11-13 | 北京大学 | One kind having the liquid-crystal composition of smectic phase-cholesteric transition |
| CN109713559B (en) * | 2019-02-01 | 2020-06-12 | 中国科学院理化技术研究所 | Blue-phase liquid crystal film and preparation method and application thereof |
| CN110862829B (en) * | 2019-11-19 | 2021-11-05 | 北京大学 | Low-driving-voltage liquid crystal composition for PDLC (polymer dispersed liquid crystal) and preparation method thereof |
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| JP2009057459A (en) * | 2007-08-31 | 2009-03-19 | Kyushu Univ | Liquid crystal composition and liquid crystal element |
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| US7648647B2 (en) * | 2007-05-08 | 2010-01-19 | Kyushu University, National University Corporation | Polymer/liquid crystal composite and liquid crystal element |
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| JP4228404B2 (en) * | 1997-12-18 | 2009-02-25 | Ｄｉｃ株式会社 | Nematic liquid crystal composition and liquid crystal display device using the same |
| JP2002226451A (en) * | 2000-11-29 | 2002-08-14 | Dainippon Ink & Chem Inc | Optically active compound, liquid crystal composition containing the same and liquid crystal device using the composition |
| JP2003327966A (en) * | 2002-05-08 | 2003-11-19 | Japan Science & Technology Corp | Liquid crystal material for optical modulation element |
| WO2005080529A1 (en) * | 2004-02-20 | 2005-09-01 | Asahi Glass Company, Limited | Liquid crystal material for optical device and optical modulation device |
| JP2009057459A (en) * | 2007-08-31 | 2009-03-19 | Kyushu Univ | Liquid crystal composition and liquid crystal element |
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| US9567523B2 (en) * | 2013-05-31 | 2017-02-14 | Boe Technology Group Co., Ltd. | Blue phase liquid crystal composite material and liquid crystal display comprising the same |
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| TWI435929B (en) | 2014-05-01 |
| CN102517035A (en) | 2012-06-27 |
| TW201315801A (en) | 2013-04-16 |
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