CN100573275C - Display panels and liquid crystal compound - Google Patents
Display panels and liquid crystal compound Download PDFInfo
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- CN100573275C CN100573275C CNB2008101663590A CN200810166359A CN100573275C CN 100573275 C CN100573275 C CN 100573275C CN B2008101663590 A CNB2008101663590 A CN B2008101663590A CN 200810166359 A CN200810166359 A CN 200810166359A CN 100573275 C CN100573275 C CN 100573275C
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- polymethylmethacrylate
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Abstract
The invention provides a kind of display panels, comprise one first substrate, one second substrate, a liquid crystal layer, a subtend electrode, a picture number structure of arrays, at least one both alignment layers and at least one polymeric layer.Liquid crystal layer is disposed between first substrate and second substrate.Counter electrode is disposed between the liquid crystal layer and first substrate.Be disposed between the liquid crystal layer and second substrate as the number structure of arrays.Both alignment layers is disposed between counter electrode and the liquid crystal layer, and between picture number structure of arrays and the liquid crystal layer.Polymeric layer is disposed between both alignment layers and the liquid crystal layer, and wherein the material of polymeric layer comprises a plurality of high polymer monomers and polymethylmethacrylate, and the content of polymethylmethacrylate in polymeric layer is greater than 1ppm, and less than 15000ppm.
Description
Technical field
The invention provides a kind of display panels, particularly relevant for a kind of display panels with polymeric layer of auxiliary alignment effect.
Background technology
The manufacture craft of LCD mainly is making and LCD MODULE (liquid crystal module, assembling LCM) that comprises display panels (liquid crystal panel).Wherein, the making of display panels mainly is that liquid crystal is sealed up for safekeeping between colored optical filtering substrates and picture number multiple substrate.In order to make liquid crystal molecule produce specific inclination angle and arrangement mode reaching the display effect of wide viewing angle, a display panels orientation (alignment) structure Design that can need to arrange in pairs or groups.
Holding above-mentioned, common alignment structure includes orientation projection (alignment protrusion) and is arranged at orientation slit (alignment slit) on the electrode.The configuration of orientation projection and orientation slit can make the liquid crystal molecule of liquid crystal layer present the arrangement of multiple domain orientation to reach the display effect of wide viewing angle.Yet the liquid crystal molecule that is positioned at orientation projection and orientation slit periphery often presents indefinite toppling direction (disclination) and causes the situation of dark line of bright attitude or dark attitude light leak.At this moment, the demonstration of display panels contrast meeting thereby reduction.Therefore, (Polymer StabilizedAlignment, PSA) technology is suggested a kind of polymer-stabilized alignment.
Carry out polymer-stabilized alignment technology (PSA), must earlier monomer (monomer) be mixed in the liquid crystal layer of position between colored optical filtering substrates and picture number multiple substrate, and grant the specific voltage of liquid crystal layer.Simultaneously, under this voltage, shine in liquid crystal layer with ultraviolet light (UV).At this moment, monomer can produce polyreaction and solidify, and forms polymeric layer (polymer layer) in the liquid crystal layer both sides.Wherein, the molecule of polymeric layer can present specific structure, and helps the orientation of auxiliary liquid crystal molecule.The PSA technology can be so that Liquid Crystal Molecules Alignment be comparatively stable, and does not need projection cube structure, thereby more can not make display panels produce the problem of dark line of bright attitude or dark attitude light leak, and can promote the panel penetrance.
Yet when monomer was subjected to ultraviolet light (UV) irradiation with the formation polymeric layer, monomer itself needs to receive enough energy just can carry out polymerization.Therefore, in the PSA manufacture craft, the time shutter must be enough to satisfy the carrying out of polymerization.In other words, PSA manufacture craft process need influences production capacity than the long time shutter.
Specifically, if the time shutter is not enough, it is incomplete to cause monomer to solidify (curing), and can't assist liquid crystal alignment to arrange effectively.Thus, reaction time of display panels (responsetime) and performance thereof can be restricted.If the suitable increase time shutter, can improve liquid crystal molecule reaction time and performance.But then, the production capacity of display panels can be restricted and the contrast of display panels also can thereby descend.Therefore, on the manufacture craft of polymer-stabilized alignment technology, also has the space of further improving.
Summary of the invention
In view of the disadvantages of prior art, the object of the present invention is to provide a kind of display panels, its advantage is that its liquid crystal molecule reaction time is shorter.
The present invention also aims to provide a kind of liquid crystal compound, the required exposure time was shorter when its advantage was to carry out polymerization.
It is as follows with the technical scheme of the present invention of effect to achieve the above object:
The invention provides a kind of display panels, comprise one first substrate, one second substrate, a liquid crystal layer, a subtend electrode, a picture number structure of arrays, at least one both alignment layers and at least one polymeric layer; Liquid crystal layer is disposed between first substrate and second substrate; Counter electrode is disposed between the liquid crystal layer and first substrate; Be disposed between the liquid crystal layer and second substrate as the number structure of arrays; Both alignment layers is disposed between counter electrode and the liquid crystal layer, and/or between picture number structure of arrays and the liquid crystal layer; Polymeric layer is disposed between both alignment layers and the liquid crystal layer; Wherein the material of polymeric layer comprises polymethylmethacrylate, and the content of polymethylmethacrylate in polymeric layer is greater than 1ppm, less than 15000ppm.
Above-mentioned both alignment layers is disposed between counter electrode and the liquid crystal layer, and/or between picture number structure of arrays and the liquid crystal layer, refer at least one both alignment layers and be positioned at least one side of described liquid crystal layer, comprise that both alignment layers is disposed between counter electrode and the liquid crystal layer or is disposed at as between number structure of arrays and the liquid crystal layer or be disposed between counter electrode and the liquid crystal layer and between picture number structure of arrays and the liquid crystal layer; Preferred described both alignment layers is disposed between counter electrode and the liquid crystal layer, and between picture number structure of arrays and the liquid crystal layer.
Picture number among the present invention is also referred to as " picture number " in Hong Kong and Taiwan term the inside, and its English name is pictureelement.
Array among the present invention refers to array, and the two implication is identical.
In one embodiment of this invention, the above-mentioned content of polymethylmethacrylate in polymeric layer is less than 5000ppm.
In another embodiment of the present invention, the content of above-mentioned polymethylmethacrylate in polymeric layer is 500ppm.
In one embodiment of this invention, the material of above-mentioned polymeric layer also comprises the alkyl derivative of polymethylmethacrylate.
In one embodiment of this invention, the material of above-mentioned both alignment layers comprises pi.
In one embodiment of this invention, above-mentioned polymeric layer also comprises a plurality of macromolecules that are polymerized by a plurality of photopolymerizable monomers, a plurality of hot polymerisable monomer or combinations thereof.Particularly, the above-mentioned high molecular material that polymerisable monomer was polymerized comprises acryl resin, methacrylic resin, vinyl, oxygen vinyl, epoxy resin or combinations thereof.
The present invention also provides a kind of liquid crystal compound, comprise liquid crystal material and composite material, composite material evenly mixes with liquid crystal material, wherein composite material comprises a plurality of polymerization single polymerization monomer molecules and polymethylmethacrylate, and the content of polymethylmethacrylate in composite material is greater than 1ppm, and less than 15000ppm.
In a preferred embodiment of the invention, the content of above-mentioned polymethylmethacrylate in composite material is less than 5000ppm, more preferably 500ppm.
In a preferred embodiment of the invention, above-mentioned composite material also comprises the alkyl derivative of polymethylmethacrylate.
In a preferred embodiment of the invention, above-mentioned polymerization single polymerization monomer molecule is a plurality of photopolymerizable monomer molecules, a plurality of hot polymerisable monomer molecules or above-mentioned combination.
In a preferred embodiment of the invention, the material of above-mentioned polymerization single polymerization monomer molecule comprises the combination of acryl resin (acrylate), methacrylic resin (methyl acrylate), vinyl (vinyl), oxygen vinyl (vinyloxy), epoxy resin (epoxy) or mentioned component.
The present invention reaches the beneficial effect of expection, is because of adding polymethylmethacrylate in liquid crystal compound, thus in polymkeric substance orientation manufacture craft the needed time shutter shorter.And the reaction time of its liquid crystal molecule of display panels of the present invention is shorter, and therefore, display panels of the present invention has higher display quality.
Description of drawings
Fig. 1: the synoptic diagram of a kind of display panels of the embodiment of the invention.
One of Fig. 2 A: two steps of a kind of solidification process of the embodiment of the invention ().
Fig. 2 B: two steps of a kind of solidification process of the embodiment of the invention (two).
Fig. 3 A: the display panels of the embodiment of the invention and existing display panels liquid crystal molecule under different voltages are returned to the reaction time comparison diagram of holding state again from holding state to show state.
Fig. 3 B: the display panels of the embodiment of the invention and existing display panels liquid crystal molecule comparison diagram under different voltages from holding state to the show state required time.
Drawing reference numeral:
100---display panels 110---first substrate 120---second substrates
130---liquid crystal layer 130 '---liquid crystal compound 132---liquid crystal molecules
140---counter electrode 150---as number structure of arrays 160---both alignment layers
170---polymeric layer 172---macromolecule 172 '---polymerization single polymerization monomer molecules
174---polymethylmethacrylate
Embodiment
For above-mentioned feature and advantage of the present invention can be become apparent, describe the present invention in detail below in conjunction with accompanying drawing, but do not limit practical range of the present invention.
Embodiment 1
Please refer to Fig. 1, Fig. 1 is the synoptic diagram of a kind of display panels of one embodiment of the invention.The display panels 100 of present embodiment comprises one first substrate 110, one second substrate 120, a liquid crystal layer 130, a subtend electrode 140, a picture number structure of arrays 150, at least one both alignment layers 160 and at least one polymeric layer 170.Liquid crystal layer 130 is disposed between first substrate 110 and second substrate 120.Counter electrode 140 is disposed between the liquid crystal layer 130 and first substrate 110.Also have, be disposed between the liquid crystal layer 130 and second substrate 120 as number structure of arrays 150.In addition, both alignment layers 160 (or being called the bottom both alignment layers) is disposed between counter electrode 140 and the liquid crystal layer 130, and between picture number structure of arrays 150 and the liquid crystal layer 130.Polymeric layer 170 (or being called polymer-stabilized alignment layer or top both alignment layers) then is disposed between both alignment layers 160 and the liquid crystal layer 130, wherein has polymethylmethacrylate 174 in the polymeric layer 170, and the content of polymethylmethacrylate 174 in polymeric layer 170 is greater than 1ppm, and less than 15000ppm.
In the present embodiment, both alignment layers 160 is example and the both sides up and down that lay respectively at liquid crystal layer 130 with two-layer.Simultaneously, present embodiment is that example describes with two layers of polymers layer 170 also.But, the invention is not restricted to this.
In the present embodiment, (polymethyl methacrylate, PMMA) 174 content in polymeric layer 170 are less than 5000ppm for above-mentioned polymethylmethacrylate.And the material of polymeric layer 170 can further comprise the alkyl derivative (alkyl derivatives) of polymethylmethacrylate.In addition, polymeric layer 170 also comprises the macromolecule 172 that is formed by a plurality of photopolymerizable monomer molecules, a plurality of hot polymerisable monomer molecules or above-mentioned polymerization mix.In the present embodiment, the polymerization single polymerization monomer molecule comprises acryl resin monomer molecule (acrylate), methacrylic resin monomer molecule (methyl acrylate), vinyl monomer molecule (vinyl), oxygen vinyl monomer molecule (vinyloxy), epoxy monomer molecule (epoxy) or above-mentioned combination.
The polymerization single polymerization monomer molecule can be selected from Compound I, II, III one of them.
The chemical formulation of Compound I is as follows:
The chemical formulation of Compound I I is as follows:
Compound III is as follows with chemical formulation:
" R " be hydrogen atom, fluorine atom, chlorine atom, cyano group (cyano group ,-CN), thiocyano (thiocyanato ,-SCN), pentafluoride-sulfanyl (pentafluoro-lambda～6～-sulfanyl ,-SF
5H), nitro (nitrite ,-NO
2), have the straight or branched alkyl (alkyl group) or the X2-Sp of 1 to 12 carbon atom
2-P
2Base.When polymerisable monomer " R " when having the straight or branched alkyl of 1 to 12 carbon atom, its non-conterminous one or two-CH
2-Ji can by oxygen atom, sulphur atom, vinyl (vinylene ,-CH=CH-), carbonyl (carbonyl, C=O), carboxyl (carboxyl ,-COO-), the sulfuration carbonyl (carbothio, S-CO-,-CO-S-) or alkynyl (alkyne) replace.
" X
1" reach " X
2" for being oxygen atom, sulphur atom, methoxyl (methyoxy ,-OCH independently
2-), carbonyl (carbonyl, C=O), carboxyl (carboxyl ,-COO-), amine formyl (carbamoyl ,-CO-NOR-,-NOR-CO-), methyl mercapto (methylthio ,-CH
2S-,-SCH
2-), the ethene carbonyl (ethenylcarbonyl ,-CH=CH-COO-), the carbonyl vinyl (carbonylethenyl ,-COO-CH=CH-) or singly-bound.
" Sp
1" reach " Sp
2" for being an interval group or a singly-bound independently.
" Lm " is respectively hydrogen atom, fluorine atom, chlorine atom, cyano group (cyano group), alkyl (alkyl), alkyl carbonyl (alkylcarbonyl), alkoxy carbonyl group (alkoxycarbonyl) or has the alkane carbonyl oxygen base (alkylcarbonyloxy) of 1 to 7 carbon atom, wherein m 〉=1 and n≤1." Lm " of polymerisable monomer is that its one or more hydrogen atom can be replaced by fluorine atom or chlorine atom when having the alkane carbonyl oxygen base of 1 to 7 carbon atom.
" P
1" reach " P
2" be respectively polymerizable groups, polymerizable groups can be selected from group VI, VII, VIII, IX and X one of them.Group VI is as follows with chemical formulation, and wherein " U " is selected from hydrogen atom, methyl (methyl), fluorine atom, trifluoromethyl (trifluoromethyl ,-CF
3) and phenyl (Phenyl).
Group VII is as follows with chemical formulation, and wherein " T " is selected from hydrogen atom, methyl, fluorine atom, trifluoromethyl and phenyl.
Group VIII is pyrroles-2, the 5-diketone (pyrrole-2,5-dione), chemical formulation is as follows:
The chemical formulation of group IX is as follows:
Wherein " Y " is selected from hydrogen atom, methyl, fluorine atom, trifluoromethyl and phenyl.
The chemical formulation of radicals X is as follows:
Wherein " M " is selected from hydrogen atom, methyl, fluorine atom, trifluoromethyl and phenyl.
In the present embodiment, the material by the macromolecule 172 that above-mentioned polymerisable monomer was polymerized comprises acryl resin (acrylate), methacrylic resin (methyl acrylate), vinyl (vinyl), oxygen vinyl (vinyloxy), epoxy resin (epoxy) or above-mentioned combination.In addition, the material of both alignment layers 160 comprises pi (Polyimide).
Generally speaking, polymeric layer 170 can only be made up of macromolecule 172.But, macromolecule 172 that above-mentioned these polymerizable monomer molecules were polymerized and the tack between pi are not that suitable ideal and alignment effect that polymeric layer 170 is provided are restricted.Thus, the polymeric layer of only being made up of macromolecule 172 170 may cause negative effect to the reaction rate of liquid crystal molecule in the liquid crystal layer 130.Therefore, the polymeric layer 170 of present embodiment more is added with polymethylmethacrylate 174 so that the adhesion between both alignment layers 160 and the polymeric layer 170 promotes except macromolecule 172.Thus, the reaction rate of the liquid crystal molecule of liquid crystal layer 130 can be enhanced and make display panels 100 have superior display quality.
In detail, Fig. 2 A and Fig. 2 B illustrate the step of making display panels in one embodiment of the invention.
Embodiment 2
Please refer to Fig. 2 A, at first, liquid crystal molecule 132, polymerization single polymerization monomer molecule 1 72 ' and polymethylmethacrylate 174 are mixed and be disposed between first substrate 110 and second substrate 120.At this, the mixing of liquid crystal molecule 132, polymerization single polymerization monomer molecule 1 72 ' and polymethylmethacrylate 174 for example is called liquid crystal compound 130 '.
Then, please also refer to Fig. 2 A and Fig. 2 B, between first substrate 110 and second substrate 120, grant specific electric field.Simultaneously, under above-mentioned electric field action, make polymerization single polymerization monomer molecule 1 72 ' generation polyreaction and form macromolecule 172.After solidifying, macromolecule 172 can on first substrate 110 of liquid crystal layer 130 both sides and second substrate 120, form polymeric layer 170.At this moment, display panels 100 just completes.
What deserves to be mentioned is, when present embodiment is made polymeric layer 170, except polymerization single polymerization monomer molecule 1 72 ', more in liquid crystal compound 130 ', added polymethylmethacrylate 174.Polymethylmethacrylate 174 is promoted outside the homogeneity of polymeric layer 170 except increasing the dissolubility of polymerization single polymerization monomer molecule 1 72 ' to liquid crystal molecule 132, can also improve the tack of 170 of macromolecule 172 and both alignment layers.Therefore, polymerization single polymerization monomer molecule 1 72 ' aggregates into and can be solidified into polymeric layer 170 easily behind the macromolecule 172 and the needed time of exposure is shortened.Thus, except saving manufacture craft the time, can also make display panels 100 that preferable demonstration contrast effect is arranged.
Embodiment 3
Fig. 3 A is display panels and existing display panels liquid crystal molecule under different voltages of the embodiment of the invention is returned to the reaction time of holding state again from holding state to show state a comparison diagram.Fig. 3 B is the display panels and existing display panels liquid crystal molecule comparison diagram from holding state to the show state required time under different voltages of the embodiment of the invention.Please refer to Fig. 3 A and Fig. 3 B, in the present embodiment, the circle diagram case is denoted as a kind of display panels of the embodiment of the invention, and its polymeric layer is that the liquid crystal compound by the polymethylmethacrylate that contains 0.3% polymerization single polymerization monomer molecule and 0.05% is made.Square pattern is represented existing display panels, and its polymeric layer does not contain polymethylmethacrylate.Can know from Fig. 3 A and Fig. 3 B and to learn, under the polymerization single polymerization monomer molecule of variable concentrations, add the polymethylmethacrylate of extremely low concentration, for example be 500ppm, can help promptly that the reaction time of liquid crystal molecule accelerates in the display panels.Especially under low-voltage, the gap in the reaction time of liquid crystal molecule is more obvious in the liquid crystal layer.
In sum, liquid crystal compound of the present invention comprises the alkyl derivative of liquid crystal, polymerization single polymerization monomer molecule and polymethylmethacrylate or polymethylmethacrylate simultaneously.The alkyl derivative of polymethylmethacrylate or polymethylmethacrylate helps to improve behind the polymerization single polymerization monomer molecule aggregation and the tack between the both alignment layers.Can reduce the required time of exposure when therefore, carrying out polymkeric substance orientation manufacture craft with the making display panels.Therefore in addition, the performance in liquid crystal molecule reaction time also can be and even more ideal in the display panels.
Though the present invention discloses as above with preferred embodiment; right its is not in order to qualification the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention is as the criterion when the qualification with claim.
Claims (12)
1. display panels comprises:
One first substrate;
One second substrate;
One liquid crystal layer is disposed between this first substrate and this second substrate;
One subtend electrode is disposed between this liquid crystal layer and this first substrate;
One picture number structure of arrays is disposed between this liquid crystal layer and this second substrate;
At least one both alignment layers is disposed between this counter electrode and this liquid crystal layer, and/or this liquid crystal layer and this be as between the number structure of arrays, and the material of this both alignment layers comprises pi; And
At least one polymeric layer is disposed between this both alignment layers and this liquid crystal layer, wherein has polymethylmethacrylate in this polymeric layer, and the content of polymethylmethacrylate in this polymeric layer is greater than 1ppm, and less than 15000ppm.
2. display panels as claimed in claim 1, wherein the content of polymethylmethacrylate in this polymeric layer is less than 5000ppm.
3. display panels as claimed in claim 1, wherein the content of polymethylmethacrylate in this polymeric layer is 500ppm.
4. display panels as claimed in claim 1, wherein the material of this polymeric layer also comprises the alkyl derivative of polymethylmethacrylate.
5. display panels as claimed in claim 1, wherein this polymeric layer also comprises a plurality of macromolecules that formed by a plurality of photopolymerizable monomer molecules, a plurality of hot polymerisable monomer molecules or above-mentioned polymerization mix.
6. display panels as claimed in claim 5, wherein this high molecular material comprises acryl resin, methacrylic resin, vinyl, oxygen vinyl, epoxy resin or above-mentioned combination.
7. liquid crystal compound comprises:
One liquid crystal material; And
One composite material evenly mixes with this liquid crystal material, and wherein this composite material comprises a plurality of polymerization single polymerization monomer molecules and polymethylmethacrylate, and the content of polymethylmethacrylate in this composite material is greater than 1ppm, and less than 15000ppm.
8. liquid crystal compound as claimed in claim 7, wherein the content of polymethylmethacrylate in this composite material is less than 5000ppm.
9. liquid crystal compound as claimed in claim 7, wherein the content of polymethylmethacrylate in this polymeric layer is 500ppm.
10. liquid crystal compound as claimed in claim 7, wherein this composite material also comprises the alkyl derivative of polymethylmethacrylate.
11. liquid crystal compound as claimed in claim 7, wherein this polymerization single polymerization monomer molecule is a plurality of photopolymerizable monomer molecules, a plurality of hot polymerisable monomer molecules or above-mentioned combination.
12. liquid crystal compound as claimed in claim 7, wherein this polymerization single polymerization monomer molecule comprises acryl resin monomer molecule, methacrylic resin monomer molecule, vinyl monomer molecule, oxygen vinyl monomer molecule, epoxy monomer molecule or above-mentioned combination.
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|---|---|---|---|
| CNB2008101663590A CN100573275C (en) | 2008-09-26 | 2008-09-26 | Display panels and liquid crystal compound |
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|---|---|---|---|
| CNB2008101663590A CN100573275C (en) | 2008-09-26 | 2008-09-26 | Display panels and liquid crystal compound |
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| CN100573275C true CN100573275C (en) | 2009-12-23 |
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| EP3210075B1 (en) * | 2014-10-21 | 2019-02-13 | ROLIC Technologies AG | Polymer containing scattering type vertically aligned liquid crystal device |
| CN105974675B (en) * | 2016-07-13 | 2019-02-19 | 深圳市华星光电技术有限公司 | Flexible display panels and preparation method thereof |
| JP2018106162A (en) * | 2016-12-26 | 2018-07-05 | Dic株式会社 | Liquid crystal display and polymerizable liquid crystal composition |
| US11053354B2 (en) * | 2018-07-23 | 2021-07-06 | Sharp Kabushiki Kaisha | Liquid crystal display device |
| CN108873489A (en) * | 2018-08-16 | 2018-11-23 | 惠科股份有限公司 | Method and apparatus for manufacturing display panel |
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