WO2014205800A1 - 一种液晶面板及其配向膜、配向膜的制作方法 - Google Patents

一种液晶面板及其配向膜、配向膜的制作方法 Download PDF

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WO2014205800A1
WO2014205800A1 PCT/CN2013/078416 CN2013078416W WO2014205800A1 WO 2014205800 A1 WO2014205800 A1 WO 2014205800A1 CN 2013078416 W CN2013078416 W CN 2013078416W WO 2014205800 A1 WO2014205800 A1 WO 2014205800A1
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alignment film
liquid crystal
group
alignment
monomer
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PCT/CN2013/078416
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English (en)
French (fr)
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钟新辉
李冠政
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深圳市华星光电技术有限公司
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Priority to US14/001,640 priority Critical patent/US9274378B2/en
Publication of WO2014205800A1 publication Critical patent/WO2014205800A1/zh

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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K19/00—Liquid crystal materials
    • C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
    • C09K19/06—Non-steroidal liquid crystal compounds
    • C09K19/32—Non-steroidal liquid crystal compounds containing condensed ring systems, i.e. fused, bridged or spiro ring systems
    • C09K19/322—Compounds containing a naphthalene ring or a completely or partially hydrogenated naphthalene ring
    • C—CHEMISTRY; METALLURGY
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    • C09K19/00—Liquid crystal materials
    • C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
    • C09K19/06—Non-steroidal liquid crystal compounds
    • C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
    • C09K19/10—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings
    • C09K19/14—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings linked by a carbon chain
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K19/00—Liquid crystal materials
    • C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
    • C09K19/06—Non-steroidal liquid crystal compounds
    • C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
    • C09K19/10—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings
    • C09K19/20—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings linked by a chain containing carbon and oxygen atoms as chain links, e.g. esters or ethers
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K19/00—Liquid crystal materials
    • C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
    • C09K19/06—Non-steroidal liquid crystal compounds
    • C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
    • C09K19/30—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing saturated or unsaturated non-aromatic rings, e.g. cyclohexane rings
    • C09K19/3001—Cyclohexane rings
    • C09K19/3066—Cyclohexane rings in which the rings are linked by a chain containing carbon and oxygen atoms, e.g. esters or ethers
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K19/00—Liquid crystal materials
    • C09K19/52—Liquid crystal materials characterised by components which are not liquid crystals, e.g. additives with special physical aspect: solvents, solid particles
    • C09K19/54—Additives having no specific mesophase characterised by their chemical composition
    • C09K19/56—Aligning agents
    • 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
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/133711—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by organic films, e.g. polymeric films
    • C—CHEMISTRY; METALLURGY
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    • C09K19/00—Liquid crystal materials
    • C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
    • C09K2019/0444—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit characterized by a linking chain between rings or ring systems, a bridging chain between extensive mesogenic moieties or an end chain group
    • C09K2019/0448—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit characterized by a linking chain between rings or ring systems, a bridging chain between extensive mesogenic moieties or an end chain group the end chain group being a polymerizable end group, e.g. -Sp-P or acrylate
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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    • C09K19/00—Liquid crystal materials
    • C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
    • C09K19/06—Non-steroidal liquid crystal compounds
    • C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
    • C09K19/10—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings
    • C09K19/12—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings at least two benzene rings directly linked, e.g. biphenyls
    • C09K2019/121—Compounds containing phenylene-1,4-diyl (-Ph-)
    • C09K2019/122—Ph-Ph
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K19/00—Liquid crystal materials
    • C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
    • C09K19/06—Non-steroidal liquid crystal compounds
    • C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
    • C09K19/10—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings
    • C09K19/20—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings linked by a chain containing carbon and oxygen atoms as chain links, e.g. esters or ethers
    • C09K19/2007—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings linked by a chain containing carbon and oxygen atoms as chain links, e.g. esters or ethers the chain containing -COO- or -OCO- groups
    • C09K2019/205—Ph-Ph-Ph-COO-Ph
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K19/00—Liquid crystal materials
    • C09K19/04—Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
    • C09K19/06—Non-steroidal liquid crystal compounds
    • C09K19/08—Non-steroidal liquid crystal compounds containing at least two non-condensed rings
    • C09K19/30—Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing saturated or unsaturated non-aromatic rings, e.g. cyclohexane rings
    • C09K19/3001—Cyclohexane rings
    • C09K19/3066—Cyclohexane rings in which the rings are linked by a chain containing carbon and oxygen atoms, e.g. esters or ethers
    • C09K19/3068—Cyclohexane rings in which the rings are linked by a chain containing carbon and oxygen atoms, e.g. esters or ethers chain containing -COO- or -OCO- groups
    • C09K2019/3083—Cy-Ph-COO-Ph

Definitions

  • Liquid crystal panel Liquid crystal panel, alignment film thereof, and alignment film manufacturing method
  • the invention relates to liquid crystal display technology, in particular to a novel liquid crystal alignment technology. Background technique
  • CRT displays have been replaced by thin and light LCDs in just a few years.
  • liquid crystal displays mostly used TN (Twisted nematic) or STN (Super twisted nematic) mode, the liquid crystal material used is positive nematic liquid crystal, and a certain amount of chiral agent is added.
  • the long axis of the liquid crystal is aligned parallel to the surface of the substrate, and the alignment direction of the liquid crystal on the surface of the substrate is determined by the rubbing direction of the alignment layer (Polyimide), and the alignment direction of the upper and lower substrates forms a certain clip.
  • the angle is usually 90 degrees. Therefore, the molecules of the liquid crystal layer are continuously twisted from one substrate surface to the other.
  • the display In addition to the upper and lower substrates and the liquid crystal layer, the display also has a polarizer attached to the outer surface of the substrate and having a direction perpendicular to the absorption axis, and a backlight. The light of the backlight passes through the polarizer and is linearly polarized. After the twisted liquid crystal layer, the polarization direction thereof also changes, and the other polarizer is smoothly passed, and the display is in a light transmitting state. After a certain voltage is applied to the liquid crystal layer, the long axis of the liquid crystal body tends to be aligned in the direction of the electric field.
  • the TN/STN type liquid crystal display is one of the earlier commercialized displays, but its application is greatly limited due to its small viewing angle, brightness difference and chromatic aberration at a large viewing angle. Later, the compensation film can improve the viewing angle and chromatic aberration of the TN/STN display to a certain extent, but at the same time it also increases the manufacturing cost, and the effect still cannot fully meet the requirements of high-quality displays.
  • MVA Multi-domain vertical alignment type TFT-LCD solves TN/STN well
  • the problem of viewing angle limitation of a liquid crystal display is that it uses a negative liquid crystal and a vertical alignment film material.
  • the long axis of the liquid crystal body is perpendicular to the surface of the substrate, and application of a voltage causes the negative liquid crystal body to be inclined, and the long axis of the liquid crystal body tends to be aligned in the direction of the vertical electric field.
  • one sub-pixel is divided into a plurality of regions, so that the liquid crystals in different regions are tilted in different directions, so that the effects seen by the display from different directions tend to be uniform.
  • the first type is by exposure and development, as shown in Fig. 1 (a), that is, on the opposing faces of the two substrates 1 on which the ITO electrodes 3 are provided, a projection (also called Bump) 2 is formed to make the convex
  • a projection also called Bump 2 is formed to make the convex
  • the liquid crystal at the workpiece and its vicinity produces a certain pretilt angle, guiding the other liquid crystal bodies to also fall in a predetermined fixed direction.
  • the second method is to directly form an ITO electrode 3 having a certain pattern on the substrate 1.
  • the upper and lower ITO electrodes 3 are formed with a certain misalignment, so that the generated electric field direction has a certain inclination angle, thereby controlling the reversal of the liquid crystal body in different regions. It is called PVA (Patterned vertical alignment) technology, as shown in Figure 1 (b).
  • the third is PSVA (Polymer stabilized vertical alignment) technology, as shown in Figure 2 (a) ⁇
  • An ITO electrode 3 (usually a fishbone type) having a certain pattern is formed on one side of the substrate 1, and the other substrate is a full-surface ITO electrode 3, and a photopolymerizable monomer which is photoexcitable and polymerizable is added to the liquid crystal material.
  • the liquid crystal body in different regions is tilted in a predetermined direction by an electric field, and then the photopolymerizable monomer 5 in the liquid crystal material is subjected to ultraviolet photopolymerization under ultraviolet light irradiation to form a protrusion 2 having a liquid crystal body to be tilted.
  • PSVA technology has a series of advantages such as high transmittance, high contrast, and fast response, which has become one of the mainstream technologies for large-size LCD panels.
  • the present invention provides an alignment film comprising a photosensitive molecular group, which improves the utilization of light energy by the alignment film, initiates polymerization of the polymerizable monomer, and can effectively regulate Polymerization of polymerized monomers.
  • Such a liquid crystal alignment film for being disposed on a substrate of a liquid crystal display panel, the alignment film comprising a plurality of alignment molecules, wherein the alignment molecules are composed of at least one dianhydride monomer and a diamine monomer body
  • structural unit A and / or B contains a terphenyl group.
  • the structural unit A and/or B further has an anthracene hydrocarbon, a decyloxy group or an ester group having a carbon number of not more than 12; or the hetero atom is N, 0, F, Si, P, S, Cl, One or more of Br or I.
  • the amount of the substance containing the monomer of the structural unit A and / or B is from 5 to 50% by the total amount of the total monomer.
  • the molecular weight of the alignment type molecule is 5 X 10 3 to 5 X 10 5 .
  • the invention also provides a method for fabricating such an alignment film, comprising the following steps:
  • the above-mentioned alignment type molecule and solvent are mixed into an alignment film solution; the solvent accounts for 80% to 99% by mass of the alignment film solution ;
  • the solvent comprises N-methylpyrrolidone (NMP), N-ethylpyrrolidone (NEP), Y-butyrolactone (Y-BL), hydrazine, hydrazine-dimethylformamide ( DMF), one or more of hydrazine, hydrazine-dimethylacetamide (DMAc), dimethyl sulfoxide (DMSO), m-cresol, chloroform.
  • NMP N-methylpyrrolidone
  • NEP N-ethylpyrrolidone
  • Y-BL Y-butyrolactone
  • DMF hydrazine
  • DMF hydrazine-dimethylformamide
  • DMAc hydrazine-dimethylacetamide
  • DMSO dimethyl sulfoxide
  • m-cresol chloroform.
  • a leveling agent is further added to the alignment film solution, wherein the leveling agent accounts for 0.01 ⁇ 2% by mass of the alignment film solution; and the leveling agent is selected from the group consisting of isophorone and diacetone alcohol. , aromatic hydrocarbon mixture, dibasic acid ester mixture.
  • the present invention also provides a liquid crystal panel produced by such an alignment film, comprising two oppositely disposed substrates, wherein a liquid crystal body with a photopolymerizable monomer is disposed between the two substrates, and a side of the substrate adjacent to the liquid crystal body An alignment film is also provided, the alignment film having the alignment type molecule.
  • the photopolymerizable monomer has at least one or more structures of Formula 1, Formula 2 or Formula 3:
  • P represents a group having a polymerization activity, and includes any one or more of a methacrylate group, an acrylate group, a vinyl group, a vinyloxy group, and an epoxy group;
  • Z represents a group including -0-, -COO-, -OCO-, -CH 2 0-, -OCH 2 0-, -0(CH 2 ) 2 0-, -COCH 2 -, -CH 2 - One or more of -C ⁇ C-.
  • the H atom in the Z group is substituted with any one of -F, -Cl, -Br, -CH 3 , -CN.
  • an electrode is further disposed between the substrate and the alignment film.
  • the photopolymerizable monomer accounts for 0.25 to 5% by mass of the liquid crystal body.
  • the present invention optimizes the structure of the alignment film material by introducing a photosensitive group, can adjust the reaction rate of the polymerizable monomer to a suitable production range, and improve the uniformity of the reaction of the polymerizable monomer in the reaction region, thereby effectively improving mura In case, the optical quality of the liquid crystal panel is improved.
  • Fig. 1 (a) and (b) are respectively an exposure development method for liquid crystal body guiding and a PVA method.
  • Fig. 2 (a) to (d) are schematic diagrams of a conventional PSVA method for liquid crystal guiding.
  • 3(a) to (d) are schematic diagrams showing the steps of the PSVA method of the present invention. detailed description
  • the liquid crystal panel and the alignment film thereof of the invention form an alignment type molecule by introducing a group having a photosensitive property into the alignment film, and the ultraviolet light energy in a certain wavelength range is absorbed by the alignment type molecule to control the polymerization reaction rate of the photopolymerization monomer, The distribution of the protrusions formed by the photopolymerizable monomer is made more uniform.
  • the alignment type molecule is formed by polymerization of at least one monomer having the following structural formula:
  • Such an alignment type molecule is usually a polyimide (PI) polymer formed by dehydration polymerization of a diamine monomer and a dianhydride monomer.
  • PI polyimide
  • This example employs a dianhydride monomer having the following structure (see structural formula al) and a polymerization reaction with two diamine monomers (see structural formulas t1 and bl). The ratio of the amount of the monomer represented by the structural formulas al, tl, and bl is 5:2:3, and the synthetic polyimide-oriented molecule PI-1 is synthesized.
  • the ratio of the terphenyl-containing monomer t1 to the total amount of all monomers is 20%. Since the monomer of the structural formula t1 contains a terphenyl group, it is known to those skilled in the art that the polyimide-aligned molecule PI-1 obtained by the polymerization reaction necessarily contains a terphenyl structure. Synthetic polyimide The molecular weight of the molecular molecule PI-1 is greater than 5,000. A method of producing a liquid crystal alignment film using such an alignment type molecule will be described below.
  • the above-mentioned alignment type molecule PI-1 is mixed with a solvent to form an alignment film solution.
  • the alignment molecule PI-1 the solvent N-methylpyrrolidone (NMP); wherein the mass percentage of NMP in the alignment film solution is 94%;
  • step II Applying the prepared alignment film solution prepared in step I to the substrate;
  • the liquid crystal panel formed by using the alignment film is as follows. As shown in FIG. 3( a ), the embodiment provides a liquid crystal panel including two oppositely disposed substrates 1 , and the two substrates 1 include a liquid crystal body.
  • the liquid crystal body includes a liquid crystal body 4 and a photopolymerizable monomer 5.
  • the substrate 1 is further provided with an electrode 3 on the side adjacent to the liquid crystal.
  • the electrode 3 is generally an ITO electrode made of a transparent material. Usually, a whole electrode 3 is arranged on one substrate 1, and an electrode 3 with a fishbone pattern is formed on the other substrate. The orientation of each domain is aligned.
  • An alignment film 6 is provided on both electrodes 3 for providing an appropriate preset tilt angle for the liquid crystal body 4, so that the response time of the liquid crystal body is shortened.
  • the photopolymerizable monomer 5 has the structure of the following general formula 1:
  • the photopolymerizable monomer 5 of the present embodiment is exemplified by the structural formula rl.
  • the mechanism of action of the photopolymer and the alignment molecule formed by the structural formula rl on the liquid crystal panel will be described below:
  • the alignment film designed in this embodiment is applied to the PS-VA. (polymer stabilized vertical alignment)
  • a photopolymerizable monomer e.g., structural formula rl
  • the photopolymerizable monomer accounts for 0.5% by mass of the liquid crystal. As shown in FIGS.
  • the liquid crystal body 4 in different regions is tilted in a predetermined direction by an electric field, and then, when irradiated with ultraviolet light, the above-mentioned alignment type molecules contain photosensitive molecules (not shown in the drawing) a terphenyl group, which has a strong absorption of ultraviolet light having a wavelength in the range of 260 nm to 380 nm due to the terphenyl structure, and can transfer the absorbed energy to the photopolymerizable monomer in the liquid crystal body 5 The polymerization reaction is initiated.
  • the photopolymerizable monomer 5 originally dispersed in the liquid crystal is polymerized to form a plurality of polymers having a relatively high molecular weight and a large volume, which are redistributed in the liquid crystal.
  • the polymer is a projection 2 for guiding the aligned arrangement of the liquid crystal bodies 4.
  • the alignment film 6 formed by the terphenyl group as a side chain or a part of the main chain of the alignment type molecule can be uniformly distributed on the alignment film 6, and the reaction rate of the photopolymerizable monomer 5 at each position in the liquid crystal can be effectively regulated.
  • the existing ultraviolet light irradiation process requires 2 hours to complete the photopolymerization reaction (the existing quality standard requires that the residual amount of the photopolymerizable monomer is less than 20ppm); After introducing a new alignment film in this embodiment, only 90 minutes of ultraviolet light irradiation process of the same intensity can reach the existing quality standard. The faster the polymerization of the photopolymerizable monomer, the better the quality of the liquid crystal panel is improved, and the mura condition can be effectively improved while improving the optical quality of the liquid crystal panel.
  • This example differs from Example 1 in that the alignment type molecule is a polyimide alignment type molecule PI-2 formed of a monomer of the structural formula al, the structural formula t2 and the structural formula bl.
  • the ratio of the amount of the monomer substances represented by the structural formulas a1, t2, and bl is 5: 1: 4, and the amount of the substance of the terphenyl group is 10% in the total monomer amount, forming
  • the molecular weight of the polymer PI-2 is between 5000 and 5 X 10 5 .
  • the structural formula t2 contains a structure of a terphenyl group, and the formed alignment type The sub-PI-2 necessarily contains a terphenyl structure.
  • the material of the alignment type molecule PI-2 is dissolved in a mixed solvent of NMP and butyrolactone ( ⁇ -BL), and then a leveling agent isophorone is added, and the mixture is uniformly mixed.
  • NMP accounts for 95% by mass of the alignment film solution
  • Y-BL accounts for 1% by mass of the alignment film solution
  • isophorone content accounts for 0.01% by mass of the alignment film solution, and the balance is oriented.
  • Molecular PI-2 mass percentage At 200 °. The film was prebaked for 60 minutes and then baked at 250 ° C for 150 minutes to form an alignment film.
  • the alignment film and the photopolymerizable monomer having the specific formula 2 are formed in the structure of the liquid crystal panel to exhibit an alignment action on the liquid crystal.
  • the photopolymerizable monomer is specifically represented by the structural formula r2.
  • the photopolymerizable monomer of the structural formula r2 is controlled to have a mass percentage of the liquid crystal of 0.4%. Under the same intensity of ultraviolet light irradiation, only 60 minutes of photopolymerization is required, and the residual amount of the photopolymerizable monomer is less than 20 ppm. , and the mura situation has improved.
  • Embodiment 1 For the mechanism of action of this embodiment, see Embodiment 1
  • This example differs from Example 1 in that the alignment type molecule is a polyimide alignment type molecule PI-3 formed of the monomers of the structural formulas a2, t2 and b2.
  • the ratio of the monomer of the structural formula a2, t2, and b2 is 5:1.5:3.5 according to the amount of the substance, and the amount of the substance of the terphenyl group is 15% of the total monomer, forming the alignment type molecule.
  • the molecular weight of PI-3 ranges from 5000 to 1 X 10 5 .
  • the structural formula t2 contains a structure of a terphenyl group, and the formed alignment molecule PI-2 necessarily contains a terphenyl structure.
  • the substance of PI-3 was dissolved in a mixed solvent of NMP and N-ethylpyrrolidone (NEP), and then a leveling agent diacetone alcohol was added thereto, and the mixture was uniformly mixed.
  • NMP accounts for 85% by mass of the alignment film solution
  • NEP accounts for 10% by mass of the alignment film solution
  • diacetone alcohol content accounts for 0.2% by mass of the alignment film solution
  • the remaining is an alignment type molecule PI- 3 mass percent.
  • the film was prebaked at 160 ° C for 40 minutes and then baked at 240 ° C for 100 minutes to form an alignment film.
  • the alignment film and the photopolymerizable monomer having the specific formula 3 are formed in the structure of the liquid crystal panel to exhibit an alignment action on the liquid crystal.
  • the photopolymerizable monomer is specifically represented by the structural formula r3.
  • the photopolymerization monomer of the structural formula r3 is controlled to have a mass percentage of the liquid crystal of 0.3%, and under the same intensity ultraviolet light irradiation, only 40 minutes of photopolymerization is required, and the photopolymerization monomer residual amount is lower than 20 ppm. , and the mura situation has improved.
  • Embodiment 1 For the mechanism of action of this embodiment, see Embodiment 1
  • the dianhydride monomer used in the present invention may also have the following structure, but the present invention is not limited to the following structure: Structural formula a3 structural formula a4 structural formula a5 structural formula a6 structural formula a7 structural formula t6 Structural t7 Structural formula t8
  • the diamine monomer used in the present invention may also be the following structure, but the present invention is not limited to the following structural formula t3.
  • the structural formula t4 structural formula t5 ⁇ b3 configuration b4 Configuration b5 Structural formula b6 The monomer of the formula b7 or more polymerized into PI can be arbitrarily combined without departing from the polymerization rule, wherein the molar ratio of the diamine monomer to the dianhydride monomer is equal, and the monomer having a terphenyl group is ttl ⁇ t5 The amount of the substance of any monomer is 5-50% of the total amount of the monomer substance,
  • the photopolymer monomer may also be substituted with a benzene ring structure on the basis of the formula 1, the formula 2 or the formula 3.
  • X represents a group which can be substituted for the H atom on the benzene ring, and is exemplified by -F, -Cl, -Br, -C3 ⁇ 4, -CN,
  • the Z group may also be exemplified by -COO-, -OCO-, -CH 2 0-, -OCH 2 0-, -0(CH 2 ) 2 0-, -COCH 2 -, -CH 2 -, -C One or more of ⁇ C-.
  • the content of the photopolymerizable monomer in the liquid crystal body is 0.25 to 5%, and the object of the present invention can be achieved. A better result is a mass percentage of 0.3 to 5%.
  • the selection of the solvent is not particularly limited, and examples thereof include hydrazine, hydrazine-dimethylformamide (DMF), hydrazine, hydrazine-dimethylacetamide (DMAc), and One or more of sulfoxide (DMSO), m-cresol, and chloroform.
  • the leveling agent may also be selected from Solvesso 150 (aromatic hydrocarbon mixture) known to those skilled in the art,

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Abstract

一种液晶配向膜（6），设置在液晶显示面板的基板（1）上，所述配向膜（6）包括多个配向型分子，所述配向型分子是由至少一种单体聚合形成，具有以下结构式e：其中，所述A和/或B中具有三联苯基。还提供这种配向膜的制作方法以及采用这种配向膜制作的液晶面板。通过引入光敏性基团优化配向膜材料结构，能调节可聚合单体的反应速率至合适生产的范围，并提高可聚合单体在反应区域内反应的均匀性，有效改善Mura情况，提高液晶面板的光学品位。

Description

说 明 书
一种液晶面板及其配向膜、 配向膜的制作方法
技术领域
本发明涉及液晶显示技术， 尤其是一种新型的液晶体配向技术。 背景技术
近年来随着信息技术的不断发展， 手机、 电脑， 甚至是普通家用电器均逐 歩向着智能、 轻便、 可移动的方向发展， 人机之间的信息交换效率也因此变得 非常关键。 为了能够将机器处理后的信息高效、 清楚地传达给人， 高效率、 高 质量、 大容量、 轻便、 低成本、 低能耗的显示器的作用举足轻重， 导致传统
CRT显示器在短短几年时间内被轻薄型液晶显示器取代。 早期使用的液晶显示器多采用 TN (Twisted nematic)或 STN ( Super twisted nematic)模式， 它们所用的液晶材料为正型向列型液晶， 并添加一定量的手性 剂。 未通电时， 液晶体长轴平行于基板表面排列， 基板表面液晶体的排列方向 由配向层 （Alignment layer, 材质通常为 Polyimide ) 的摩擦方向 （Rubbing direction) 决定， 上下基板表面配向方向形成一定夹角， 通常为 90度， 所以从 一个基板表面到另一个基板表面， 液晶层的分子呈连续扭转排列状态； 若扭转 角度为 90度， 则为 TN型， 若扭转角度为 270度， 则为 STN型。 显示器除了 上下基板及液晶层外， 还有贴附于基板外表面吸收轴方向相互垂直的偏光片， 以及背光源等。背光源的光经过偏光片后为线偏振光，经过扭转排列的液晶层， 其偏振方向也随之改变，进而顺利通过另一片偏光片，此时显示器呈透光状态。 当在液晶层上施加一定电压之后， 液晶体的长轴倾向于沿电场的方向排列， 此 时液晶层改变偏振光偏振状态的能力消失或下降， 显示器为不透光或光透过率 较低的状态。 TN/STN型液晶显示器是较早商业化的显示器之一， 但是由于其 可视角小，在大视角下的亮度差异和色差严重等缺点，使其应用受到很大限制。 后来，通过补偿膜的方式可以在一定程度上改善 TN/STN显示器的视角与色差 问题， 但同时也提高了其制造成本， 且其效果依然不能完全满足人们对高品质 显示器的要求。
MVA ( Multi-domain vertical alignment)型 TFT-LCD很好地解决了 TN/STN 型液晶显示器视角限制的问题， 它采用的为负型液晶与垂直配向膜材料。 未施 加电压时， 液晶体长轴垂直于基板表面， 施加电压会使负型液晶体倾斜， 液晶 体长轴倾向于沿垂直电场方向排列。 为了解决视角问题， 一个亚像素被分成多 个区域， 使不同区域中的液晶体朝不同的方向倾倒， 让显示器从不同的方向看 到的效果趋于一致。
在一个亚像素内使不同区域的液晶体导向不同的方向有多种方法。第一种 是通过曝光显影的办法， 如图 1 (a)所示， 即在设置有 ITO电极 3的两基板 1 的相向面上， 制作出凸起物（又称为 Bump) 2， 使凸起物处及其附近的液晶体 产生一定的预倾角， 引导其它液晶体也朝预先设定的固定方向倾倒。
第二种是在基板 1上直接形成具有一定图案的 ITO电极 3，上下 ITO电极 3形成一定错位， 使产生的电场方向具有一定的倾斜角度， 从而控制不同区域 的液晶体的倒向， 此技术被称为 PVA (Patterned vertical alignment) 技术， 如 图 1 (b) 所示。
第三种是 PSVA (Polymer stabilized vertical alignment)技术， 如图 2 (a) 〜
(d)所示。在基板 1的一侧形成具有一定图案的 ITO电极 3 (通常为鱼骨型） , 另一基板则为整面 ITO电极 3， 并在液晶材料中添加遇光激发可聚合的光聚合 单体 5; 通过电场使不同区域的液晶体朝预先设定的方向倾倒， 然后在紫外光 照射下使液晶材料中的光聚合单体 5发生紫外光聚合反应， 形成具有引导液晶 体倾倒的凸起物 2， 沉积在基板 1表面起到配向的作用。 相对其他的 MVA技 术， PSVA技术具有高穿透率、 高对比、 快响应等一系列优点， 由此而成为目 前大尺寸 LCD面板的主流技术之一。
但是， PSVA的关键是对可聚合单体 5的聚合反应进行控制， 包括光催化的反 应速率， 反应均匀性以及最终可聚合单体 5的残留控制等等。 只有对上述情况 进行很好的控制才能得到高品质的 PSVA液晶面板。 发明内容
为了实现对可聚合单体聚合反应的优化控制， 本发明提供一种包含光敏性 分子基团的配向膜， 通过这种配向膜提高光能利用率， 引发可聚合单体聚合， 能有效调控可聚合单体的聚合反应。
这种液晶配向膜， 用于设置在液晶显示面板的基板上， 所述配向膜包括多 个配向型分子，所述配向型分子是由至少一种二酸酐类单体和一种二胺类单体
Figure imgf000005_0001
其中， 所述结构单元 A和 /或 B中含有三联苯基。
优选地， 所述结构单元 A和 /或 B还具有碳原子数不多于 12的垸烃、垸氧 基、 酯基； 或者杂原子是 N、 0、 F、 Si、 P、 S、 Cl、 Br或 I的一种或多种。
优选地， 含所述结构单元 A和 /或 B的单体的物质的量占全部单体总物质 的量的百分数为 5〜50%。
优选地， 所述配向型分子的分子量为 5 X 103〜5 X 105。 本发明还提供这种配向膜的制作方法， 包括如下歩骤：
I、 将上述的配向型分子与溶剂混合成配向膜溶液； 所述溶剂占所述配向 膜溶液的质量百分比为 80〜99%;
II、 将配向膜溶液涂覆到基板上；
III、在 100〜200°C下预烘烤 20〜60分钟， 再在 180〜250°C后烘烤 30〜150分 钟， 形成配向膜。
优选地，所述溶剂包含 N-甲基吡咯垸酮（NMP)、 N-乙基吡咯垸酮（NEP)、 Y -丁内酯（ Y -BL)、 Ν,Ν-二甲基甲酰胺（DMF)、 Ν,Ν-二甲基乙酰胺（DMAc)、 二甲亚砜 （DMSO)、 间甲酚、 氯仿中的一种或多种。
优选地， 所述配向膜溶液中还添加有流平剂， 所述流平剂占所述配向膜溶 液质量百分比为 0.01〜2%； 所述流平剂选自异佛尔酮、 二丙酮醇、 芳香烃混合 物、 二元酸酯混合物。
本发明还提供这种配向膜制作的液晶面板， 包括两相对设置的基板， 所述 两基板之间设置带有光聚合单体的液晶体， 所述基板与所述液晶体相邻的一侧 还设有配向膜， 所述配向膜具有所述的配向型分子。
优选地， 所述光聚合单体至少具有式 1、 式 2或式 3的一种或多种结构：
Figure imgf000006_0001
式 3 其中， P代表具聚合活性的基团， 包括甲基丙烯酸酯基、 丙烯酸酯基、 乙 烯基、 乙烯氧基、 环氧基的任一种或多种； n为连接于同一个芳香环上的 P基 团个数， n=l、 2或 3;
X代表取代基团， 包括 -F、 -Cl、 -Br、 -CH3、 -CN、 2〜8个碳原子构成的垸 基或垸基醚基或垸基巯醚基； m为连接于同一个芳香环上的 X基团个数， m=l、 2或 3;
Z代表如下基团，包括 -0-、 -COO-、 -OCO-、 -CH20-、 -OCH20-、 -0(CH2)20-、 -COCH2-、 -CH2-、 -C≡C-中的一种或多种。
优选地， 所述 Z基团中的 H原子被 -F、 -Cl、 -Br, -CH3、 -CN中的任一种 基团取代。
优选地， 所述基板与所述配向膜之间还设有电极。
优选地， 所述光聚合单体占所述液晶体的质量百分数为 0.25〜5%。
有益效果， 本发明通过引入光敏性基团优化配向膜材料结构， 能调节可聚 合单体的反应速率至合适生产的范围， 并提高可聚合单体在反应区域内反应的 均匀性， 有效改善 mura情况， 提高液晶面板的光学品位。 附图说明
图 1 (a)和 （b)分别为用于液晶体导向的曝光显影法和 PVA法的歩骤示 图 2 (a) 至 （d) 为现有用于液晶体导向的 PSVA法歩骤示意图 图 3 (a) 至 （d) 为本发明的 PSVA法歩骤示意图。 具体实施方式
下面， 将结合附图对本发明实施例作详细介绍。
本发明的液晶面板及其配向膜，通过在配向膜中引入具有光敏性质的基团 形成配向型分子， 由配向型分子吸收一定波长范围内紫外光能量， 控制光聚合 单体的聚合反应速度， 使得光聚合单体所形成的凸起物分布更为均匀。
实施例 1
这种配向型分子， 是由至少一种单体聚合形成， 具有以下结构式 e结构：
Figure imgf000007_0001
其中， 所述结构单元 A和 /或 B中具有三联苯基。 这种配向型分子通常是由二胺类单体与二酐类单体脱水聚合形成的聚酰 亚胺 （PI) 聚合物。 本实施例采用如下结构的一种二酐类单体 （见结构式 al ) 与两种二胺类单体 （见结构式 tl与 bl ) 进行聚合反应。 结构式 al、 tl、 bl所 代表的单体的物质的量之比为 5: 2： 3， 合成聚酰亚胺配向型分子 PI-1。
结构式 al 结构式 tl
Figure imgf000007_0002
结构式 bl 在本实施例中， 含三联苯的单体 tl的比例占所有单体的总物质的量为 20%。 由于结构式 tl的单体中含有三联苯基， 本领域技术人员可知， 聚合反 后获得聚酰亚胺配向型分子 PI-1必然含有三联苯基结构。合成的聚酰亚胺配 型分子 PI-1的分子量大于 5000。 下面介绍采用这种配向型分子制作液晶配向膜的方法。
I、将上述配向型分子 PI-1与溶剂混合成配向膜溶液。本实施例中， 配向 型分子 PI-1 , 溶剂 N-甲基吡咯垸酮 （NMP); 其中 NMP占所述配向膜溶液的 质量百分比为 94%;
II、 将歩骤 I制备好的配向膜溶液涂覆到基板上；
III、 在 100°C下预烘烤 20分钟， 再在 180°C后烘烤 30分钟， 使配向分子 脱水聚合成聚合物， 形成配向膜。
下面介绍采用这种配向膜所形成的液晶面板， 如图 3 (a)所示， 本实施例 提供一种液晶面板，包括两相对设置的基板 1，所述两基板 1之间包括液晶体， 该液晶体中包括有液晶体 4和光聚合单体 5。 所述基板 1与所述液晶体相邻的 一侧还设有电极 3。 该电极 3—般是采用透明材料制作的 ITO电极， 通常在一 侧基板 1上布设一整块电极 3， 另一侧基板上则制作带鱼骨图案的电极 3， 通 电时液晶体 4就沿着各个畴的方向排列起来。 在两电极 3上均设有配向膜 6， 用于为液晶体 4提供恰当的预置倾角， 使得液晶体的响应时间縮短。
其中， 光聚合单体 5具有如下通式 1的结构：
通式 1
Figure imgf000008_0001
结构式 rl 本实施例的光聚合单体 5以结构式 rl为例， 下面介绍结构式 rl所形成光 聚合物与配向型分子在液晶面板的作用机理： 将该实施例设计的配向膜应用于 PS-VA (polymer stabilized vertical alignment) LCD液晶面板的制备中， 并控制 液晶体中添加光聚合单体 （如结构式 rl )， 所述光聚合单体占液晶体的质量百 分比为 0.5%。 如图 3 (b) 〜 （d) 所示， 通过电场使不同区域的液晶体 4朝预 先设定的方向倾倒， 然后当紫外光照射下， 上述配向型分子含有光敏分子（图 中未示出） 三联苯基， 由于三联苯基结构对波长 260nm至 380nm范围的紫外 光具有较强的吸收作用， 并能够将吸收的能量传递给液晶体中的光聚合单体 5 引发聚合反应。
这样， 原来分散在液晶体中的光聚合单体 5聚合形成多个分子量较高、 体 积较大的聚合物重新分布在液晶体中。该聚合物即为用于引导液晶体 4定向排 列的凸起物 2。 另一方面， 三联苯基作为配向型分子的侧链或主链一部分形成 的配向膜 6， 能均匀分布在配向膜 6上， 有效地调控液晶体中各个位置的光聚 合单体 5的反应速率、 反应残留量等， 使得聚合反应能满足实际生产的需要， 形成的凸起物 2不会局部浓度过大， 最终为液晶体 4提供恰当的预置倾角。 与 现有技术同等比例的光聚合单体发生的聚合反应相比， 现有的紫外光照射制程 需要进行 2小时才能使光聚合反应较为完全（现有质量标准要求光聚合单体的 残余量小于 20ppm); 本实施例引入新配向膜后， 仅需 90分钟同等强度的紫外 光照射制程便能达到现有质量标准。 光聚合单体的聚合反应越快， 越有利于液 晶面板质量的质量提高， 能有效改善 mura情况同时， 提高液晶面板的光学品 位。
实施例 2
本实施例与实施例 1相比， 不同的是， 配向型分子由结构式 al、 结构式 t2 和结构式 bl的单体所形成聚酰亚胺配向型分子 PI-2。
结构式 al
结构式 t2
Figure imgf000009_0001
结构式 bl 本实施例中， 结构式 al、 t2、 bl所代表的单体物质的量之比为 5: 1： 4， 三联苯基的物质的量在总单体的物质的量为 10%,形成聚合物 PI-2的分子量在 5000〜5 X 105之间。 同样地， 结构式 t2含有三联苯基的结构， 形成的配向型分 子 PI-2中必然含有三联苯基结构。
将配向型分子 PI-2的物质溶于 NMP与 丁内酯 （γ -BL) 混合溶剂中， 然后再加入流平剂异佛尔酮， 混合均匀。 其中 NMP占所述配向膜溶液的质量 百分比为 95%, Y -BL占所述配向膜溶液的质量百分比为 1%， 异佛尔酮含量占 配向膜溶液质量百分比为 0.01%， 余下为配向型分子 PI-2质量百分比。 在 200 °。下预烘烤 60分钟， 再在 250°C后烘烤 150分钟， 形成配向膜。
该配向膜与具体有通式 2 (见下）的光聚合单体形成到液晶面板的结构中， 发挥对液晶体的配向作用。 该光聚合单体具体为结构式 r2所示。
通式 2
Figure imgf000010_0001
结构式 r2
控制如结构式 r2的光聚合单体占液晶体的质量百分比为 0.4%， 在同等强 度紫外光照射下， 仅需 60分钟的光聚合反应， 便能使光聚合单体残留量低于 20ppm的水平， 并且 mura状况有所改善。 本实施例作用机理参见实施例 1所
实施例 3
本实施例与实施例 1相比， 不同的是， 配向型分子由结构式 a2、 t2和结构 式 b2的单体所形成的聚酰亚胺配向型分子 PI-3。
本实施例中， 结构式 a2、 t2、 b2的单体按照物质的量之比为 5:1.5:3.5,三联 苯基的物质的量在总单体的物质的量为 15%,形成配向型分子 PI-3分子量范围 为 5000〜1 X 105。 同样地， 结构式 t2含有三联苯基的结构， 形成的配向型分子 PI-2中必然含有三联苯基结构。
Figure imgf000010_0002
结构式 t2
Figure imgf000011_0001
结构式 b2
将 PI-3的物质溶于 NMP与 N-乙基吡咯垸酮（NEP)混合溶剂中， 然后再 加入流平剂二丙酮醇， 混合均匀。 其中 NMP占所述配向膜溶液的质量百分比 为 85%, NEP占所述配向膜溶液的质量百分比为 10%,二丙酮醇含量占配向膜 溶液质量百分比为 0.2%，余下为配向型分子 PI-3质量百分比。在 160°C下预烘 烤 40分钟， 再在 240°C后烘烤 100分钟， 形成配向膜。
该配向膜与具体有通式 3 (见下）的光聚合单体形成到液晶面板的结构中， 发挥对液晶体的配向作用。 该光聚合单体具体为结构式 r3所示。
通式 3
Figure imgf000011_0002
本实施例作用机理参见实施例 1所示。
控制如结构式 r3的光聚合单体占液晶体的质量百分比为 0.3%， 在同等强 度紫外光照射下， 仅需 40分钟的光聚合反应， 便能使光聚合单体残留量低于 20ppm的水平， 并且 mura状况有所改善。 本实施例作用机理参见实施例 1所
除上述例子之外， 本发明所采用的二酐类单体还可以是以下结构， 但本发 明内容不限于以下结构： 结构式 a3 结构式 a4 结构式 a5 结构式 a6 结构式 a7 结构式 t6
Figure imgf000012_0001
结构式 t7
Figure imgf000013_0001
结构式 t8 本发明所采用的二胺类单体还可以是以下结构， 但本发明内容不限于以下 结构式 t3 构式 t4 结构式 t5 ί式 b3 构式 b4
Figure imgf000013_0002
构式 b5 结构式 b6
Figure imgf000014_0001
结构式 b7 以上聚合成 PI的单体可以在不违背聚合反应规律的情况任意组合， 其中， 满足二胺类单体和二酐类单体摩尔比相等， 带有三联苯基的单体 tl〜t5任一单 体的物质的量占总单体物质的量的 5-50%，
光聚合物单体也可以在通式 1、 通式 2或通式 3的基础上， 对苯环结构进 行取代。
通式 1
通式 2
Figure imgf000014_0002
通式 3
P代表具有聚合活性的基团， 举例为甲基丙烯酸酯基、 丙烯酸酯基、 乙錄 基、 乙烯氧基、 环氧基的任一种或多种； n为连接于同一个芳香环上的 P基团 个数， n=l、 2或 3 ;
X代表可用于取代苯环上 H原子的基团，举例为 -F、 -Cl、 -Br, -C¾、 -CN、
2〜8个碳原子构成的垸基或垸基醚基或垸基巯醚基； m为连接于同一个芳香环 上的 X基团个数， m=l、 2或 3;
Z基团， 还可以举例为 -COO-、 -OCO-、 -CH20-、 -OCH20-、 -0(CH2)20-、 -COCH2-、 -CH2-、 -C≡C-中的一种或多种。 一般控制光聚合单体占液晶体的质量百分比为 0.25〜5%均能实现本发明目 的， 进一歩地， 获得更佳的效果是质量百分比为 0.3〜5%。 另外， 本发明的配向膜制作方法， 对溶剂的选择也没有特别限制， 例如还 可以是 Ν,Ν-二甲基甲酰胺 （DMF )、 Ν,Ν-二甲基乙酰胺 （DMAc)、 二甲亚砜 (DMSO)、 间甲酚、 氯仿中的一种或多种。
流平剂还可以选自本领域技术人员所知的 Solvesso 150 (芳香烃混合物）、
DBE (二元酸酯混合物）。 上述实施方法只为说明本发明的技术构思及特点， 其目的在于让熟悉此项 技术的认识能够了解本发明的内容并据以实施，对本发明的保护范围不构成任 何限制。 凡采用等同变换或者等效替换而形成的技术方案， 均应落在本发明权 利要求所保护的范围内。

Claims

权利要求书
1、 一种液晶配向膜， 用于设置在液晶显示面板的基板上， 其中， 所述配 向膜包括多个配向型分子， 所述配向型分子是由至少一种二酸酐类单体和一种 二胺类单体聚合形成， 具有以下结构式 e:
Figure imgf000016_0001
其中， 所述结构单元 A和 /或 B中含有三联苯基。
2、 根据权利要求 1所述配向膜， 其中， 所述结构单元 A和 /或 B还包含 碳原子数不多于 12的垸烃、 垸氧基、 酯基； 或者杂原子是 N、 0、 F、 Si、 P、 S、 Cl、 Br或 I的一种或多种。
3、 根据权利要求 1所述配向膜， 其中， 含所述结构单元 A和 /或 B的单 体的物质的量占全部单体总物质的量的百分数为 5〜50%。
4、 根据权利要求 1所述配向膜， 其中， 所述配向型分子的分子量为 5 X 103〜5 X 105 o
5、 一种配向膜的制作方法， 其中， 包括如下歩骤：
I、 将权利要求 1所述的配向型分子与溶剂混合成配向膜溶液； 所述溶剂 占所述配向膜溶液的质量百分比为 80〜99%;
II、 将配向膜溶液涂覆到基板上；
III、在 100〜200°C下预烘烤 20〜60分钟， 再在 180〜250°C后烘烤 30〜150分 钟， 形成配向膜。
6、 根据权利要求 5所述配向膜制作方法，其中，所述结构单元 A和 /或 B 还包含碳原子数不多于 12的垸烃、 垸氧基、 酯基； 或者杂原子是 N、 0、 F、 Si、 P、 S、 Cl、 Br或 I的一种或多种。
7、 根据权利要求 5所述配向膜制作方法， 其中， 含所述结构单元 A和 / 或 B的单体的物质的量占全部单体总物质的量的百分数为 5〜50%。
8、 根据权利要求 5所述配向膜制作方法， 其中， 所述配向型分子的分子 量为 5 X 103〜5 X 105。
9、 根据权利要求 5所述配向膜制作方法， 其中， 所述溶剂包含 N-甲基吡 咯垸酮、 N-乙基吡咯垸酮、 丁内酯、 Ν,Ν-二甲基甲酰胺、 Ν,Ν-二甲基乙酰 胺、 二甲亚砜、 间甲酚、 氯仿中的一种或多种。
10、 根据权利要求 5所述配向膜的制作方法， 其中， 所述配向膜溶液中 还添加有流平剂， 所述流平剂占所述配向膜溶液质量百分比为 0.01〜2%； 所述 流平剂选自异佛尔酮、 二丙酮醇、 芳香烃混合物、 二元酸酯混合物。
11、 一种液晶面板， 包括两相对设置的基板， 所述两基板之间设置带有 光聚合单体的液晶体，所述基板与所述液晶体相邻的一侧还设有配向膜，其中， 所述配向膜具有如权利要求 1所述的配向型分子。
12、 根据权利要求 11所述液晶面板， 其中， 所述结构单元 Α和 /或 Β还 包含碳原子数不多于 12的垸烃、 垸氧基、 酯基； 或者杂原子是 N、 0、 F、 Si、 P、 S、 Cl、 Br或 I的一种或多种。
13、 根据权利要求 11所述液晶面板， 其中， 含所述结构单元 A和 /或 B 的单体的物质的量占全部单体总物质的量的百分数为 5〜50%。
14、 根据权利要求 11所述液晶面板， 其中， 所述配向型分子的分子量为 5 X 103〜5 X 105 o
15、 根据权利要求 11所述液晶面板， 其中， 所述光聚合单体至少具有式 1、 式 2或式 3中的一种或多种结构：
Figure imgf000017_0001
Figure imgf000017_0002
其中， P代表具聚合活性的基团， 包括甲基丙烯酸酯基、 丙烯酸酯基、 乙 烯基、 乙烯氧基、 环氧基的任一种或多种； n为连接于同一个芳香环上的 P基 团个数， n=l、 2或 3;
X代表取代基团， 包括 -F、 -Cl、 -Br、 -CH3、 -CN、 2〜8个碳原子构成的垸 基或垸基醚基或垸基巯醚基； m为连接于同一个芳香环上的 X基团个数， m=l、 2或 3 ;
Z代表如下基团，包括 -0-、 -COO-、 -OCO-、 -CH20-、 -OCH20-、 -0(CH2)20-、 -COCH2-、 -CH2-、 -C≡C-中的一种或多种。
16、 根据权利要求 15所述液晶面板， 其中， 所述 Z基团中的 H原子可 被 -F、 -Cl、 -Br、 -C¾、 -CN中的任一种基团取代。
17、 根据权利要求 11所述液晶面板， 其中， 所述基板与所述配向膜之间 还设有电极。
18、 根据权利要求 11所述液晶面板， 其中， 所述光聚合单体占所述液晶 体的质量百分数为 0.25〜5%。
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