CN102749669A - Reflecting polaroid, method for producing same and liquid crystal display device - Google Patents
Reflecting polaroid, method for producing same and liquid crystal display device Download PDFInfo
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- CN102749669A CN102749669A CN2012102104260A CN201210210426A CN102749669A CN 102749669 A CN102749669 A CN 102749669A CN 2012102104260 A CN2012102104260 A CN 2012102104260A CN 201210210426 A CN201210210426 A CN 201210210426A CN 102749669 A CN102749669 A CN 102749669A
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133528—Polarisers
- G02F1/133536—Reflective polarizers
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3016—Polarising elements involving passive liquid crystal elements
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133528—Polarisers
- G02F1/133543—Cholesteric polarisers
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Abstract
The embodiment of the invention provides a reflecting polaroid, a method for producing the same and a liquid crystal display device, which relate to the technical field of liquid crystal display, and the reflecting Polaroid which has both optical compensation performance and broadband reflection performance can be produced. The reflecting polaroid comprises a first substrate, a first alignment layer which is arranged on the first substrate, a chiral coating which is formed on the first alignment layer, a second substrate which is arranged with the first substrate in a box manner and is provided with a second alignment layer, and cholesteric liquid crystals which are filled in a clearance, wherein the chiral coating is formed by coating chiral discotic liquid crystal solution onto the first alignment layer; spacers are arranged between the chiral coating and the second alignment layer for forming the clearance; and the cholesteric liquid crystals are produced by mixing at least nematic liquid crystals, photopolymerization nematic liquid crystal monomers, chiral compound, photoinitiator and thermal polymerization inhibitor.
Description
Technical field
The present invention relates to technical field of liquid crystal display, relate in particular to reflective polarizer, prepare the method and the liquid crystal indicator of reflective polarizer.
Background technology
Along with developing rapidly of lcd technology, employed polaroid is also more and more important in the LCD.Polaroid is to make natural light become the optical element of polarized light, is the important component part of LCD.
Owing to have the selective reflection characteristic of cholesteric liquid crystal of special helical structure, this particular optical performance makes cholesteric liquid crystal be applied in fields such as liquid crystal display, storage medium, infrared radiation barrier material and " intelligence " window widely.By the made reflective polarizer of cholesteric liquid crystal, can make polaroid have the function of selective reflecting.
Because the reflective polarizer reflection wave of processing with cholesteric liquid crystal merely is wide very narrow, therefore, to increase the reflection wave of reflective polarizer wide through in cholesteric liquid crystal, adding chiral compound for prior art.But because chiral compound and cholesteric liquid crystal molecule have similarity in chemical constitution, the molecule compatibility is better; Make its diffusion control difficult; So therefore the difficult control of manufacture craft cause the reflection wave of reflective polarizer wide still narrower, still has the space of further widening.
Summary of the invention
Embodiments of the invention cremasteric reflex formula polaroid, the method for preparing reflective polarizer and liquid crystal indicator; Can be through with the chirality discotic mesogenic and cholesteric liquid crystal is heat-treated and light irradiation processing, to prepare the reflective polarizer that has optical compensation performance and broadband reflecting properties concurrently.
For achieving the above object, embodiments of the invention adopt following technical scheme:
A kind of reflective polarizer comprises:
First substrate;
Be arranged at first alignment films on first substrate;
Be formed at the chirality coating on first alignment films; Said chirality coating is coated on chirality discotic mesogenic solution on first alignment films and prepares; Wherein, chirality discotic mesogenic solution is dissolved in the organic solvent gained by photopolymerization chirality discotic mesogenic monomer, light trigger and hot polymerization inhibitor at least;
With second substrate with second alignment films of first substrate, be provided with chock insulator matter between the said chirality coating and second alignment films, to form the gap to the box setting;
Be filled in the cholesteric liquid crystal in the gap, wherein, cholesteric liquid crystal is at least by nematic liquid crystal, photopolymerization nematic liquid crystal monomer, chipal compounds, light trigger, hot polymerization inhibitor mixing gained.
A kind of method for preparing reflective polarizer comprises:
First alignment films is set on first substrate;
Chirality discotic mesogenic solution is coated on first alignment films, and with preparation chirality coating, wherein, chirality discotic mesogenic solution is dissolved in the organic solvent gained by photopolymerization chirality discotic mesogenic monomer, light trigger and hot polymerization inhibitor at least;
First substrate is become thin-film device with second substrate that is provided with second alignment films to box-like, and between second alignment films of the chirality coating and second substrate, chock insulator matter is set, to form the gap;
Cholesteric liquid crystal is injected said gap, and wherein, cholesteric liquid crystal is at least by nematic liquid crystal, photopolymerization nematic liquid crystal monomer, chipal compounds, light trigger, hot polymerization inhibitor mixing gained;
Thin-film device is heat-treated and light irradiation processing, to process reflective polarizer.
A kind of liquid crystal indicator, the color membrane substrates that comprises array base palte, is parallel to array base palte and box is provided with array base palte, and be arranged at the liquid crystal layer between array base palte and the color membrane substrates, also comprise:
Be arranged on the reflective polarizer with an above-mentioned arbitrary characteristics opposite side with liquid crystal layer and that be arranged on an opposite side with liquid crystal layer on the color membrane substrates on the array base palte.
The reflective polarizer that the embodiment of the invention provides, the method for preparing reflective polarizer and liquid crystal indicator; Through chirality discotic mesogenic solution is being coated on first alignment films; With preparation chirality coating; And after cholesteric liquid crystal injected the gap of thin-film device, this thin-film device that is provided with the chirality coating and injects cholesteric liquid crystal is heat-treated and light irradiation processing, to process reflective polarizer.Through this scheme; Through thermal treatment and light irradiation processing; Chirality disklike molecule in the chirality coating is slowly diffusion in cholesteric liquid crystal, and forms chirality discotic mesogenic polymer network and nematic liquid crystal monomer-polymer network, and then it is wide to have increased the reflection wave of cholesteric liquid crystal; Therefore can prepare the reflective polarizer that has optical compensation performance and broadband reflecting properties concurrently, and it is wide to have increased in the prior art reflection wave of reflective polarizer.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 embodiment of the invention reflective polarizer structural representation;
Fig. 2 prepares the method flow synoptic diagram of reflective polarizer for the embodiment of the invention;
Fig. 3 prepares the structural representation of a kind of state in the process for embodiment of the invention reflective polarizer;
Fig. 4 prepares the structural representation of second kind of state in the process for embodiment of the invention reflective polarizer;
The structural representation of a kind of photopolymerization chirality discotic mesogenic monomer that Fig. 5 relates to for the embodiment of the invention;
Fig. 6 prepares the structural representation of the third state in the process for embodiment of the invention reflective polarizer;
Fig. 7 prepares the structural representation of the 4th kind of state in the process for embodiment of the invention reflective polarizer;
The schematic arrangement of the photopolymerization nematic liquid crystal monomer that Fig. 8 relates to for the embodiment of the invention;
The schematic arrangement of the chipal compounds R811 that Fig. 9 relates to for the embodiment of the invention;
The schematic arrangement of the light trigger I651 that Figure 10 relates to for the embodiment of the invention;
Figure 11 is the reflected light spectrogram of embodiment of the invention reflective polarizer;
Figure 12 is the chiral liquid crystal molecule phase delay curve map of the embodiment of the invention.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
The embodiment of the invention provides a kind of reflective polarizer 1, and is as shown in Figure 1, comprising:
Be arranged at first alignment films 11 on first substrate 10;
Be formed at the chirality coating 12 on first alignment films 11; Wherein, Chirality coating 12 is coated on chirality discotic mesogenic solution on first alignment films 11 and prepares; Wherein, chirality discotic mesogenic solution is dissolved in the organic solvent gained by photopolymerization chirality discotic mesogenic monomer, light trigger and hot polymerization inhibitor at least;
With second substrate 16 with second alignment films 15 of 10 pairs of box settings of first substrate, wherein, be provided with chock insulator matter 13 between the chirality coating 12 and second alignment films 15, to form the gap;
Be filled in the cholesteric liquid crystal 14 in the gap, wherein, cholesteric liquid crystal 14 is at least by nematic liquid crystal, photopolymerization nematic liquid crystal monomer, chipal compounds, light trigger, hot polymerization inhibitor mixing gained.
Further, chirality discotic mesogenic solution is dissolved in the organic solvent gained by photopolymerization chirality discotic mesogenic monomer, light trigger and hot polymerization inhibitor at least, comprising:
Said chirality discotic mesogenic solution is 0.1 to be that 10 light trigger and percentage by weight are 0.01 to be that 10 hot polymerization inhibitor adds the organic solvent gained to percentage by weight to percentage by weight by photopolymerization chirality discotic mesogenic monomer, percentage by weight at least.
Wherein, certain material of percentage by weight is meant: certain material accounts for the part by weight of whole solution, and promptly the weight of whole solution is B, and the weight of certain material that is comprised in this solution is A, and the percentage by weight of this material is 100*A/B so.For example; Percentage by weight is 0.1 to be that 10 light trigger is meant to percentage by weight; The percentage by weight of light trigger and chirality discotic mesogenic solution is between 0.1-10; Be that the ratio of light trigger in chirality discotic mesogenic solution is between the 0.1%-10%, and comprise boundary value (0.1%, 10%).
Further, the part by weight of said photopolymerization chirality discotic mesogenic monomer and said organic solvent is 1: 19.
Exemplary, photopolymerization chirality discotic mesogenic monomer molecule connects the symmetric form or the asymmetric discotic liquid-crystalline molecules of photopolymerization side chain and chirality side chain through ehter bond, ester bond, amido link or carbonic acid ester bond key for dish nuclear; Dish nuclear is in cool any one of phloroglucin, azine, perylene, benzophenanthrene, three polyindenes, six acetylenylbenzenes, six benzos; Photopolymerization side chain end group is any one or the two or more mixing in esters of acrylic acid, methyl acrylic ester, styrene base class, the diacetyl base class, and chirality side chain end group is any one or two or more mixing in secondary octanol, isoamylol, cholesterol, the menthol.The quantity of above-mentioned photopolymerization side chain can be 1-5; The quantity of chirality side chain can be 1-5.
Two or more mixing are meant; Can be inequality between each photopolymerization side chain in a photopolymerization chirality discotic mesogenic monomer molecule and the chirality side chain; And then, also can be inequality between each photopolymerization side chain end group and the chirality side chain end group.Specifically; If comprise three photopolymerization side chain end groups in the photopolymerization chirality discotic mesogenic monomer molecule; First photopolymerization side chain end group can be an esters of acrylic acid so; Second photopolymerization side chain end group can be identical or different with first photopolymerization side chain end group, and the 3rd photopolymerization side chain end group in like manner can be identical or different with first photopolymerization side chain end group and/or second photopolymerization side chain end group.
Further, cholesteric liquid crystal 14 by nematic liquid crystal, photopolymerization nematic liquid crystal monomer, chipal compounds, light trigger, hot polymerization inhibitor mixing gained, comprising at least:
Said cholesteric liquid crystal 14 is a cholesteric liquid crystal solution evaporation gained, and said cholesteric liquid crystal solution comprises: organic solvent, the nematic liquid crystal that is dissolved in said organic solvent, the percentage by weight that is dissolved in said organic solvent be 0.1 to percentage by weight be 30 photopolymerization nematic liquid crystal monomer, the percentage by weight that is dissolved in said organic solvent be 1 to percentage by weight be 60 chipal compounds, the percentage by weight that is dissolved in said organic solvent be 0.1 to percentage by weight be 10 light trigger and the percentage by weight that is dissolved in said organic solvent be 0.01 to percentage by weight be 10 hot polymerization inhibitor.
Further, said cholesteric liquid crystal 14 by nematic liquid crystal, photopolymerization nematic liquid crystal monomer, chipal compounds, light trigger, hot polymerization inhibitor mixing gained, comprising at least:
Said cholesteric liquid crystal 14 is a cholesteric liquid crystal solution evaporation gained, and said cholesteric liquid crystal solution comprises: organic solvent, the percentage by weight that is dissolved in said organic solvent are that 64.8 nematic liquid crystal, the percentage by weight that is dissolved in said organic solvent are that 15.0 photopolymerization nematic liquid crystal monomer, the percentage by weight that is dissolved in said organic solvent are that 14.8 chipal compounds, the percentage by weight that is dissolved in said organic solvent are that 4.4 light trigger and the percentage by weight that is dissolved in said organic solvent are 1.0 hot polymerization inhibitor.
Same, certain material of the percentage by weight here is meant: certain material accounts for the part by weight of whole solution, and promptly the weight of whole solution is B, and the weight of certain material that is comprised in this solution is A, and the percentage by weight of this material is 100*A/B so.For example, percentage by weight is that 64.8 nematic liquid crystal is meant that the percentage by weight of nematic liquid crystal and cholesteric liquid crystal solution is 64.8, and promptly the ratio of nematic liquid crystal in cholesteric liquid crystal solution is 64.8.
Further, photopolymerization nematic liquid crystal monomer is any one or the two or more mixing in esters of acrylic acid, methyl acrylic ester, styrene base class, the diacetyl base class.
Further, chipal compounds is R811 (benzoic acid, the own oxygen base of 4-; 4-[[[(1R)-1-methylheptyl] oxygen base] carbonyl] phenylester), S811 (benzoic acid; The own oxygen base of 4-, 4-[[[(1S)-1-methylheptyl] oxygen base] carbonyl] phenylester), CB15 ((+)-4 '-(2-methyl butyl)-4-biphenyl cyanogen), ZLI4572 (benzoic acid, 4-(right-4-amyl group cyclohexyl); (1R)-1-phenyl-1,2-second dimethylene ester) in any one or two or more mixing.
Further, light trigger is any one in dibenzoyl peroxide, dilauroyl peroxide, azoisobutyronitrile, di-isopropyl peroxydicarbonate, the di-cyclohexylperoxy di-carbonate; Hot polymerization inhibitor is any one in p-dihydroxy-benzene, 1,4-benzoquinone, 2-TBHQ, the 2,5 di tert butyl hydroquinone.
Further, organic solvent is any one in ethanol, acetone, methylene chloride, methenyl choloride, phenixin, tetrahydrofuran, isopropyl alcohol, cyclohexane, the benzene,toluene,xylene.
Further, chock insulator matter 13 is 10 microns to 300 microns glass microballoon for diameter.
Need to prove; The embodiment of the invention does not limit the arrangement mode of chock insulator matter; It can be to be evenly distributed between second alignment films of the chirality coating and second substrate; Also can be arranged on the edge between second alignment films of the chirality coating and second substrate, because its purpose all is to produce the gap in order to make between second alignment films of chirality coating and second substrate, so also should be within the protection domain of the embodiment of the invention.
Further, the material of first alignment films 11 or second alignment films 15 is a polyimide.
As shown in Figure 1; After being filled in cholesteric liquid crystal 14 in the gap; Owing to heat-treat and light irradiation processing; The chirality disklike molecule is slowly diffusion in cholesteric liquid crystal 14, and forms nematic liquid crystal monomer-polymer network 17 and chirality discotic mesogenic polymer network 18, and then it is wide to have increased the reflection wave of cholesteric liquid crystal 14.And because the chirality discotic mesogenic has the light compensation characteristic, so the reflective polarizer of the embodiment of the invention also has the light compensation characteristic.
The reflective polarizer that the embodiment of the invention provides; Be formed with the chirality coating being provided with on first substrate of first alignment films, and be parallel to first substrate and and the chirality coating be provided with cholesteric liquid crystal between to second substrate with second alignment films of box setting and chirality coating.Through this scheme; Owing to after cholesteric liquid crystal is injected the gap, heat-treat and light irradiation processing, the chirality disklike molecule can slowly spread in cholesteric liquid crystal; And formation chirality discotic mesogenic polymer network and nematic liquid crystal monomer-polymer network; And then the reflection wave that has increased cholesteric liquid crystal is wide, and further, reflective polarizer has optical compensation performance and broadband reflecting properties concurrently.
A kind of method for preparing reflective polarizer that the embodiment of the invention provides, as shown in Figure 2, comprising:
S101, first alignment films is set on first substrate.
Exemplary; As shown in Figure 3; First alignment films 11 is set on first substrate 10, and the material of employed first alignment films 11 of the embodiment of the invention is a polyimide, can make the liquid crystal molecule that is coated on this alignment film of polyimide appear and be parallel to the array base palte orientation.
S102, chirality discotic mesogenic solution is coated on first alignment films, with preparation chirality coating, wherein, chirality discotic mesogenic solution is dissolved in the organic solvent gained by photopolymerization chirality discotic mesogenic monomer, light trigger and hot polymerization inhibitor at least.
On first substrate, be provided with after first alignment films; Chirality discotic mesogenic solution is coated on first alignment films; Wherein, chirality discotic mesogenic solution is dissolved in the organic solvent gained by photopolymerization chirality discotic mesogenic monomer, light trigger and hot polymerization inhibitor at least.
As shown in Figure 4, on first alignment films 11, be formed with chirality coating 12.
Exemplary, the method for preparing chirality discotic mesogenic solution comprises:
Photopolymerization chirality discotic mesogenic monomer is dissolved in organic solvent, and photopolymerization chirality discotic mesogenic monomer is the material with the middle phase of discotic mesogenic;
With percentage by weight is 0.1 to be that 10 light trigger and percentage by weight are 0.01 to be that 10 hot polymerization inhibitor adds organic solvent to percentage by weight to percentage by weight;
Mix the organic solvent 1 minute to 60 minutes of photopolymerization chirality discotic mesogenic monomer, light trigger and hot polymerization inhibitor, to process chirality discotic mesogenic solution.
Particularly, prepare chirality discotic mesogenic solution method can for:
1: 19 ratio is dissolved in tetrahydrofuran solvent with photopolymerization chirality discotic mesogenic monomer;
With percentage by weight is 0.1 to be that 10 light trigger and percentage by weight are 0.01 to be that 10 hot polymerization inhibitor adds tetrahydrofuran solvent to percentage by weight to percentage by weight;
In confined conditions, stirring tetrahydrofuran solvent 30 minutes, is 5 chirality discotic mesogenic solution to process percentage by weight.
What need replenish is that photopolymerization chirality discotic mesogenic monomer molecule structure is for connecting the symmetric form or the asymmetric discotic liquid-crystalline molecules of photopolymerization side chain and chirality side chain through ehter bond, ester bond, amido link or carbonic acid ester bond;
The dish of photopolymerization chirality discotic mesogenic monomer molecule nuclear is any one or the two or more mixing in cool of phloroglucin, azine, perylene, benzophenanthrene, three polyindenes, six acetylenylbenzenes, six benzos;
Photopolymerization side chain end group is any one or the two or more mixing in esters of acrylic acid, methyl acrylic ester, styrene base class, the diacetyl base class, and the quantity of photopolymerization side chain is 1-5;
Chirality side chain end group is any one or two or more mixing in secondary octanol, isoamylol, cholesterol, the menthol, and the quantity of chirality side chain is 1-5.
Common TFT-LCD (Thin Film Transistor-Liquid Crystal Display; Thin Film Transistor-LCD) uses optics positivity liquid crystal; When watching than wide-angle, the phase delay of positivity can appear, cause the phenomenon that contrast descends and the visual angle reduces.And discotic mesogenic has the optics negativity characteristic opposite with optics positivity liquid crystal; Phase delay with negativity; This negativity phase delay can be used for compensating the phase delay of TFT-LCD positivity, so the discotic mesogenic material of optics negativity can be used for making the optical compensation films of TFT-LCD.Chirality discotic mesogenic of the present invention is the optics negativity discotic mesogenic with optical compensation characteristic, so the prepared reflective polarizer of the embodiment of the invention at first has the optical compensation characteristic.
Wherein, example, as shown in Figure 5, be the structure of photopolymerization chirality discotic mesogenic monomer molecule; This molecule is the symmetry discotic liquid-crystalline molecules, and its molecular formula is three-1,3; 5-acryloxy hexyloxybenzoate-three-2,4, the secondary octyloxy benzoic acid of 6--benzophenanthrene ester.Wherein, dish nuclear is benzophenanthrene commonly used; Three polymerizable side chains are the acryloxy hexyloxybenzoate, and wherein polymerizable side chain end group is an acrylic ester; Three chirality side chains are secondary octyloxy benzoic acid, and wherein chirality side chain end group is secondary octanol.
S103, first substrate is become thin-film device with second substrate that is provided with second alignment films to box-like, and between second alignment films of the chirality coating and second substrate, chock insulator matter is set, to form the gap.
After the chirality coating is accomplished in preparation on first alignment films, first substrate is become thin-film device with second substrate that is provided with second alignment films to box-like, and between second alignment films of the chirality coating and second substrate, chock insulator matter is set, to form the gap.
As shown in Figure 6; With first substrate 10 be parallel to first substrate 10 and carry out the box setting with second substrate 16 with second alignment films 15 of 12 pairs of box settings of chirality coating; And between the chirality coating 12 and second alignment films 15, chock insulator matter 13 is set, to form the gap.
What need to replenish is, chock insulator matter can be 10 microns to 300 microns glass microballoon for diameter, and the material of second alignment films also can be polyimide.
S104, cholesteric liquid crystal is injected said gap, wherein, cholesteric liquid crystal is at least by nematic liquid crystal, photopolymerization nematic liquid crystal monomer, chipal compounds, light trigger, hot polymerization inhibitor mixing gained.
Between second alignment films with the chirality coating of first substrate in the thin-film device and second substrate chock insulator matter is set; After forming the gap, cholesteric liquid crystal is injected among the gap that forms, exemplary; Cholesteric liquid crystal is injected the gap under vacuum; Wherein, because the effect of second alignment films, cholesteric liquid crystal appears and is parallel to the array base palte orientation.
As shown in Figure 7, cholesteric liquid crystal 14 is filled in the gap.
At first, need carry out brief account to cholesteric liquid crystal:
Therefore cholesteric liquid crystal has the selective reflecting characteristic because of having special helical structure.
The source of cholesteric liquid crystal generally has two kinds: a kind of have the chirality group for liquid crystal molecule itself; Another kind of for to obtain through in nematic liquid crystal, mixing chipal compounds.
In cholesteric liquid crystal, the major axis of liquid crystal molecule is made Periodic Rotating around a screw axis, forms helical structure.360 ° of long axis of liquid crystal molecule rotations the distance of process be called as pitch P, the content of chipal compounds is inversely proportional in the size of P and the liquid crystal.The reflection wave of the cholesteric liquid crystal of single pitch is wide=Δ nP, and wherein, Δ n is respectively the birefraction of liquid crystal material.
In the reflection wave wide region, the cholesteric liquid crystal that the circularly polarized light that revolves of a left side (right side) is revolved for a left side (right side) by helical structure reflects the circularly polarized light that revolves on the right side (left side) by transmission; And outside the reflection wave wide region, the circularly polarized light of a left side and dextrorotation is all seen through.Just because of this, cholesteric liquid crystal also can be used as reflective polarizer, and visible light obtains circularly polarized light after its reflection, through changing rectilinearly polarized light behind the quarter wave plate into, can directly be used for LCD again.
The cholesteric liquid crystal of the embodiment of the invention is at least by nematic liquid crystal, photopolymerization nematic liquid crystal monomer, chipal compounds, light trigger, hot polymerization inhibitor mixing gained.
Exemplary, the method for preparing cholesteric liquid crystal comprises:
With nematic liquid crystal, percentage by weight is 0.1 to be that 30 photopolymerization nematic liquid crystal monomer, percentage by weight are 1 to be that 60 chipal compounds, percentage by weight are 0.1 to be that 10 light trigger, percentage by weight are 0.01 to be that 10 hot polymerization inhibitor is dissolved in organic solvent to percentage by weight to percentage by weight to percentage by weight to percentage by weight;
The volatilization organic solvent is to process the cholesteric liquid crystal with single pitch of liquid crystal phase temperature in 60 ℃ of-120 ℃ of scopes.
Particularly, prepare cholesteric liquid crystal method can for:
With percentage by weight is that 64.8 nematic liquid crystal, percentage by weight are that 15.0 photopolymerization nematic liquid crystal monomer, percentage by weight are that 14.8 chipal compounds, percentage by weight are that 4.4 light trigger, percentage by weight are that 1.0 hot polymerization inhibitor is dissolved in organic solvent;
After potpourri was dissolved in solvent, solvent flashing was to process the cholesteric liquid crystal with single pitch of liquid crystal phase temperature in 60 ℃ of-120 ℃ of scopes.
What need to replenish is, photopolymerization nematic liquid crystal monomer is any one or the two or more mixing in esters of acrylic acid, methyl acrylic ester, styrene base class, the diacetyl base class;
Chipal compounds is any one or the two or more mixing among R811, S811, CB15, the ZLI4572;
Light trigger is any one in dibenzoyl peroxide, dilauroyl peroxide, azoisobutyronitrile, di-isopropyl peroxydicarbonate, the di-cyclohexylperoxy di-carbonate;
Hot polymerization inhibitor is any one in p-dihydroxy-benzene, 1,4-benzoquinone, 2-TBHQ, the 2,5 di tert butyl hydroquinone;
Solvent is any one in ethanol, acetone, methylene chloride, methenyl choloride, phenixin, tetrahydrofuran, isopropyl alcohol, cyclohexane, the benzene,toluene,xylene.
Wherein, as shown in Figure 8, be the structure of photopolymerization nematic liquid crystal monomer C6M; This molecule is an esters of acrylic acid photopolymerization nematic liquid crystal; Its molecular formula is 1, two (4-(the own oxygen base of 6 '-propenyloxy group) the benzoyloxy)-2-toluene of 4-, and two photolytic activity functional groups are acrylic ester;
As shown in Figure 9, be chipal compounds R811 molecular structure, its molecular formula is (benzoic acid, the own oxygen base of 4-, 4-[[[(1R)-1-methylheptyl] oxygen base] carbonyl] phenylester);
Shown in figure 10, be the molecular structure of light trigger I651, its molecular formula is 2,2-dimethoxy-phenyl ketone.
What need replenish is; Several kinds of compositions of the described composition cholesteric liquid crystal of the embodiment of the invention: outside nematic liquid crystal, chipal compounds, photopolymerization nematic liquid crystal monomer, the light trigger; Also can be according to selected composition, technology and actual needs; Whether decision adds other components such as achirality micromolecule liquid crystal, smectic liquid crystal, dyestuff, and the present invention does not limit.
S105, thin-film device is heat-treated and light irradiation processing, to process reflective polarizer.
After cholesteric liquid crystal is injected the gap of thin-film device, thin-film device is heat-treated and light irradiation processing, to process reflective polarizer.
As shown in Figure 1; After cholesteric liquid crystal 14 is injected the gap of thin-film device; Thin-film device is heat-treated and light irradiation processing; The chirality disklike molecule is slowly diffusion in cholesteric liquid crystal 14, and forms chirality discotic mesogenic polymer network 17 and nematic liquid crystal monomer-polymer network 18, and then it is wide to have increased the reflection wave of cholesteric liquid crystal 14.
Exemplary, thin-film device is heat-treated and light irradiation processing, can comprise with the process of processing reflective polarizer:
Thin-film device is warming up in 90 ℃ of-120 ℃ of scopes; Preheating 1 minute to 60 minutes, and carry out the ultraviolet irradiation polymerization crosslinking, wherein; The ultraviolet irradiation time is 1 minute to 60 minutes; Ultraviolet wavelength is 365 nanometers, and irradiation dose is that every square centimeter of 0.001 milliwatt is to every square centimeter of 100 milliwatt, to process reflective polarizer.
Particularly, thin-film device is heat-treated and light irradiation processing, with the method for processing reflective polarizer can for:
Thin-film device is warming up to 110 ℃, preheating 30 minutes, and carry out the ultraviolet irradiation polymerization crosslinking, and wherein, the ultraviolet irradiation time is 30 minutes, ultraviolet wavelength is 365 nanometers, irradiation L.Every square centimeter of dosage 10 milliwatt; Like this; When thermal treatment and ultraviolet irradiation processing, the chirality disklike molecule can spread in cholesteric liquid crystal, and forms nematic liquid crystal monomer-polymer network and chirality discotic mesogenic polymer network; This makes the wide increase of reflection wave of cholesteric liquid crystal, and then has processed the reflective polarizer that has optical compensation performance and broadband reflecting properties concurrently.
The reflective polarizer that preparation is accomplished is tested the curve that reflectivity changes with incident wavelength under 298.2 Kelvins' temperature; Shown in the curve 1 of Figure 11; Transverse axis is that the reflection wave of reflective polarizer is wide, and the longitudinal axis is the reflectivity of reflective polarizer, at this moment; Reflection circle polarized light wavelength scope is the 400-700 nanometer, and reflection bandwidth is 300 nanometers.
Can get according to experimental data, shown in the curve 2 of Figure 11, extend to 60 minutes preheating time, promptly along with the prolongation of preheating time; Reflection kernel is subjected to displacement, and simultaneously, reflection wave is wide to narrow down gradually; Reflection circle polarized light wavelength scope is the 420-680 nanometer, and reflection bandwidth is 260 nanometers, in this explanation warm; Preheating time is different, and slowly diffusion is different in cholesteric liquid crystal to cause the chirality disklike molecule, wide the changing of reflection wave that causes reflective polarizer.
Further, the reflective polarizer of preparing made soaked in solvent after, isolate the chirality coating; The phase-delay value of the chiral liquid crystal molecule in the test chirality coating; Shown in figure 12, transverse axis is a polarizing angle, and the longitudinal axis is a phase-delay value; Can get by experimental data; The chiral liquid crystal molecule still can produce phase delay when polarizing angle was negative value, and promptly the chiral liquid crystal molecule is the optics negativity discotic mesogenic with optical compensation characteristic, thereby the prepared reflective polarizer of proof the present invention has the optical compensation characteristic.
The method for preparing reflective polarizer that the embodiment of the invention provides; Through first alignment films is set on first substrate; And will be coated on first alignment films by the chirality discotic mesogenic solution that photopolymerization chirality discotic mesogenic monomer, light trigger and hot polymerization inhibitor are dissolved in the organic solvent gained; After preparation chirality coating, first substrate is become thin-film device with second substrate that is provided with second alignment films to box-like, and between second alignment films of the chirality coating and second substrate, chock insulator matter is set; To form the gap; And then will inject the gap of thin-film device by the cholesteric liquid crystal of nematic liquid crystal, photopolymerization nematic liquid crystal monomer, chipal compounds, light trigger, hot polymerization inhibitor mixing gained, and thin-film device is heat-treated and light irradiation processing, to process reflective polarizer.Through this scheme, can prepare the reflective polarizer that has optical compensation performance and broadband reflecting properties concurrently, it is wide to have increased in the prior art reflection wave of reflective polarizer.
A kind of liquid crystal indicator that the embodiment of the invention provides, the color membrane substrates that comprises array base palte, is parallel to array base palte and box is provided with array base palte, and be arranged at the liquid crystal layer between array base palte and the color membrane substrates, also comprise:
Be arranged on a reflective polarizer same as the previously described embodiments opposite side with liquid crystal layer and that be arranged on an opposite side with liquid crystal layer on the color membrane substrates on the array base palte.
The liquid crystal indicator that the embodiment of the invention provides, said liquid crystal indicator can have the product or the parts of Presentation Function for LCD, LCD TV, DPF, mobile phone, panel computer etc.; And this liquid crystal indicator can be used above-mentioned reflective polarizer, and the structure of its reflective polarizer is same as the previously described embodiments, repeats no more here.
More than; Be merely embodiment of the present invention, but protection scope of the present invention is not limited thereto, any technician who is familiar with the present technique field is in the technical scope that the present invention discloses; Can expect easily changing or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (17)
1. a reflective polarizer is characterized in that, comprising:
First substrate;
Be arranged at first alignment films on first substrate;
Be formed at the chirality coating on first alignment films; Said chirality coating is coated on chirality discotic mesogenic solution on first alignment films and prepares; Wherein, chirality discotic mesogenic solution is dissolved in the organic solvent gained by photopolymerization chirality discotic mesogenic monomer, light trigger and hot polymerization inhibitor at least;
With second substrate with second alignment films of first substrate, be provided with chock insulator matter between the said chirality coating and second alignment films, to form the gap to the box setting;
Be filled in the cholesteric liquid crystal in the gap, wherein, cholesteric liquid crystal is at least by nematic liquid crystal, photopolymerization nematic liquid crystal monomer, chipal compounds, light trigger, hot polymerization inhibitor mixing gained.
2. according to the reflective polarizer of claim 1, it is characterized in that said chirality discotic mesogenic solution is dissolved in the organic solvent gained by photopolymerization chirality discotic mesogenic monomer, light trigger and hot polymerization inhibitor at least, comprising:
Said chirality discotic mesogenic solution comprises: organic solvent, the photopolymerization chirality discotic mesogenic monomer that is dissolved in said organic solvent, the percentage by weight that is dissolved in said organic solvent be 0.1 to percentage by weight be 10 light trigger and the percentage by weight that is dissolved in said organic solvent be 0.01 to percentage by weight be 10 hot polymerization inhibitor.
3. according to the reflective polarizer of claim 2, it is characterized in that the part by weight of said photopolymerization chirality discotic mesogenic monomer and said organic solvent is 1: 19.
4. according to each described reflective polarizer among the claim 1-3; It is characterized in that said photopolymerization chirality discotic mesogenic monomer molecule connects the symmetric form or the asymmetric discotic liquid-crystalline molecules of photopolymerization side chain and chirality side chain through ehter bond, ester bond, amido link or carbonic acid ester bond key for dish nuclear; Dish nuclear is in cool any one of phloroglucin, azine, perylene, benzophenanthrene, three polyindenes, six acetylenylbenzenes, six benzos; Photopolymerization side chain end group is any one or the two or more mixing in esters of acrylic acid, methyl acrylic ester, styrene base class, the diacetyl base class; Chirality side chain end group is any one or two or more mixing in secondary octanol, isoamylol, cholesterol, the menthol.
5. according to the reflective polarizer of claim 4, it is characterized in that the quantity of said photopolymerization side chain is 1-5, the quantity of said chirality side chain is 1-5.
6. according to the reflective polarizer of claim 1, it is characterized in that said cholesteric liquid crystal by nematic liquid crystal, photopolymerization nematic liquid crystal monomer, chipal compounds, light trigger, hot polymerization inhibitor mixing gained, comprising at least:
Said cholesteric liquid crystal is a cholesteric liquid crystal solution evaporation gained, and said cholesteric liquid crystal solution comprises: organic solvent, the nematic liquid crystal that is dissolved in said organic solvent, the percentage by weight that is dissolved in said organic solvent be 0.1 to percentage by weight be 30 photopolymerization nematic liquid crystal monomer, the percentage by weight that is dissolved in said organic solvent be 1 to percentage by weight be 60 chipal compounds, the percentage by weight that is dissolved in said organic solvent be 0.1 to percentage by weight be 10 light trigger and the percentage by weight that is dissolved in said organic solvent be 0.01 to percentage by weight be 10 hot polymerization inhibitor.
7. according to the reflective polarizer of claim 1, it is characterized in that said cholesteric liquid crystal by nematic liquid crystal, photopolymerization nematic liquid crystal monomer, chipal compounds, light trigger, hot polymerization inhibitor mixing gained, comprising at least:
Said cholesteric liquid crystal is a cholesteric liquid crystal solution evaporation gained, and said cholesteric liquid crystal solution comprises: organic solvent, the percentage by weight that is dissolved in said organic solvent are that 64.8 nematic liquid crystal, the percentage by weight that is dissolved in said organic solvent are that 15.0 photopolymerization nematic liquid crystal monomer, the percentage by weight that is dissolved in said organic solvent are that 14.8 chipal compounds, the percentage by weight that is dissolved in said organic solvent are that 4.4 light trigger and the percentage by weight that is dissolved in said organic solvent are 1.0 hot polymerization inhibitor.
8. according to each described reflective polarizer among the claim 1-3,5,6,7; It is characterized in that photopolymerization nematic liquid crystal monomer is any one or the two or more mixing in esters of acrylic acid, methyl acrylic ester, styrene base class, the diacetyl base class.
9. according to each described reflective polarizer among the claim 1-3,5,6,7, it is characterized in that chipal compounds is any one or the two or more mixing among R811, S811, CB15, the ZLI4572.
10. according to each described reflective polarizer among the claim 1-3,5,6,7; It is characterized in that said light trigger is any one in dibenzoyl peroxide, dilauroyl peroxide, azoisobutyronitrile, di-isopropyl peroxydicarbonate, the di-cyclohexylperoxy di-carbonate; Hot polymerization inhibitor is any one in p-dihydroxy-benzene, 1,4-benzoquinone, 2-TBHQ, the 2,5 di tert butyl hydroquinone.
11. according to each described reflective polarizer among the claim 1-3,5,6,7; It is characterized in that said organic solvent is any one in ethanol, acetone, methylene chloride, methenyl choloride, phenixin, tetrahydrofuran, isopropyl alcohol, cyclohexane, the benzene,toluene,xylene.
12. according among the claim 1-3,5,6,7 each said in any one reflective polarizer, it is characterized in that said chock insulator matter is that diameter is 10 microns to 300 microns a glass microballoon.
13. a method for preparing reflective polarizer is characterized in that, comprising:
First alignment films is set on first substrate;
Chirality discotic mesogenic solution is coated on first alignment films, and with preparation chirality coating, wherein, chirality discotic mesogenic solution is dissolved in the organic solvent gained by photopolymerization chirality discotic mesogenic monomer, light trigger and hot polymerization inhibitor at least;
First substrate is become thin-film device with second substrate that is provided with second alignment films to box-like, and between second alignment films of the chirality coating and second substrate, chock insulator matter is set, to form the gap;
Cholesteric liquid crystal is injected said gap, and wherein, cholesteric liquid crystal is at least by nematic liquid crystal, photopolymerization nematic liquid crystal monomer, chipal compounds, light trigger, hot polymerization inhibitor mixing gained;
Thin-film device is heat-treated and light irradiation processing, to process reflective polarizer.
14. the method for preparing reflective polarizer according to claim 13 is characterized in that, said thin-film device is heat-treated and light irradiation processing, to process reflective polarizer, comprising:
Thin-film device is warming up in 90 ℃ of-120 ℃ of scopes; Preheating 1 minute to 60 minutes, and carry out the ultraviolet irradiation polymerization crosslinking, wherein; The ultraviolet irradiation time is 1 minute to 60 minutes; Ultraviolet wavelength is 365 nanometers, and irradiation dose is that every square centimeter of 0.001 milliwatt is to every square centimeter of 100 milliwatt, to process reflective polarizer.
15. the method for preparing reflective polarizer according to claim 13 is characterized in that, said thin-film device is heat-treated and light irradiation processing, to process reflective polarizer, comprising:
Thin-film device is warming up to 110 ℃, preheating 30 minutes, and carry out the ultraviolet irradiation polymerization crosslinking, and wherein, the ultraviolet irradiation time is 30 minutes, and ultraviolet wavelength is 365nm, and every square centimeter of irradiation dose 10 milliwatt are to process reflective polarizer.
16. the method for preparing reflective polarizer according to claim 13 is characterized in that, said cholesteric liquid crystal is injected the gap of thin-film device, comprising:
Cholesteric liquid crystal is injected said gap under vacuum, wherein, cholesteric liquid crystal appears and is parallel to the array base palte orientation.
17. a liquid crystal indicator, the color membrane substrates that comprises array base palte, is parallel to array base palte and box is provided with array base palte, and be arranged at the liquid crystal layer between array base palte and the color membrane substrates, and it is characterized in that, also comprise:
Be arranged on the reflective polarizer like a claim 1-12 opposite side with liquid crystal layer and that be arranged on an opposite side with liquid crystal layer on the color membrane substrates on the array base palte.
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| CN2012102104260A CN102749669A (en) | 2012-06-20 | 2012-06-20 | Reflecting polaroid, method for producing same and liquid crystal display device |
| PCT/CN2012/084838 WO2013189147A1 (en) | 2012-06-20 | 2012-11-19 | Reflective polarizer, method for producing same and liquid crystal display device |
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| WO2013189147A1 (en) * | 2012-06-20 | 2013-12-27 | 京东方科技集团股份有限公司 | Reflective polarizer, method for producing same and liquid crystal display device |
| CN104155800A (en) * | 2014-07-11 | 2014-11-19 | 京东方科技集团股份有限公司 | Reflective liquid-crystal display |
| CN106054304A (en) * | 2016-08-19 | 2016-10-26 | 京东方科技集团股份有限公司 | Polarizing plate, manufacturing method thereof and corresponding device |
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| CN109143711A (en) * | 2018-07-10 | 2019-01-04 | 宁波激智科技股份有限公司 | A kind of transparent anti-blue light protective film and preparation method thereof |
| CN109143711B (en) * | 2018-07-10 | 2022-02-22 | 宁波激智科技股份有限公司 | Transparent blue-light-proof protective film and preparation method thereof |
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