CN105182618B - The preparation method of PI, LCD and the two, photo-alignment layer composition, alignment method - Google Patents
The preparation method of PI, LCD and the two, photo-alignment layer composition, alignment method Download PDFInfo
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- CN105182618B CN105182618B CN201510674347.9A CN201510674347A CN105182618B CN 105182618 B CN105182618 B CN 105182618B CN 201510674347 A CN201510674347 A CN 201510674347A CN 105182618 B CN105182618 B CN 105182618B
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Classifications
-
- 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
- G02F1/133723—Polyimide, polyamide-imide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- C08G73/1003—Preparatory processes
- C08G73/1007—Preparatory processes from tetracarboxylic acids or derivatives and diamines
-
- 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
- G02F1/13378—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation
- G02F1/133784—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation by rubbing
-
- 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
- G02F1/13378—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation
- G02F1/133788—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation by light irradiation, e.g. linearly polarised light photo-polymerisation
Abstract
The present invention provides a kind of polyimides and preparation method thereof, the alignment method of photo-alignment layer composition, photo-alignment layer, liquid crystal display device and preparation method thereof, and for solving, contrast after oriented layer is orientated in the prior art is low, generates the problems such as bright spot.Polyimides of the present invention and preparation method thereof, the alignment method of photo-alignment layer composition, photo-alignment layer, liquid crystal display device and preparation method thereof, due to using the photo-alignment layer for including above-mentioned polyimides, irradiation twice need to be only carried out in light orientation, light orientation can be completed, saved cleaning, simplify processing step, reduce process costs.
Description
Technical field
The present invention relates to display technology fields, and in particular, to a kind of polyimides and preparation method thereof, photo-alignment layer group
Close object, the alignment method of photo-alignment layer, liquid crystal display device and preparation method thereof.
Background technology
Thin-film transistor LCD device (Thin Film Transistor Liquid Crystal Display,
TFT-LCD), it is widely used in the various aspects of our lives, from the mobile phone, video camera, digital camera of small size, middle size
Laptop, desktop computer, large-sized domestic TV to large-scale projection device etc., liquid crystal display device is not only light, thin, but also
Also gradually match in excellence or beauty traditional cathode-ray tube display (Cathode Ray Tube, CRT) in terms of image quality and response speed,
TFT-LCD has substituted CRT as mainstream, and price has also had dropped very much, and has adequately popularized.
Thin-film transistor LCD device industrialized production generally comprises array processes, color membrane process, molding process, mould
Group technique.
Allocating process is one important component of molding process, and allocating process is divided into traditional friction process and light orientation
Technique.
Conventional friction technique since friction roller is in the friction process to oriented layer, the particle on roller can generate come off,
And it is limited in rough and uneven in surface place's orientation effect, it generates bright spot, reduce contrast, individually using the orientation effect of friction process such as
Shown in Fig. 1.
Light orientation (Optical Alignment) is to utilize to include specific polyimides (Polyimide, PI) material
Oriented layer, the initial orientation to form oriented layer is irradiated using the ultraviolet light of specific direction.
Light orientation is the ultraviolet source irradiation oriented layer using anisotropy energy, sends out the macromolecular structure of orientation layer surface
Photopolymerization, conversion or the cracking reaction of raw unevenness tropism, cause film surface to generate the Van der Waals force of anisotropy distribution, and then lure
Lead Liquid Crystal Molecules Alignment.
It is strong that light orientation relative to the advantage of friction orientation is mainly reflected in antistatic effect, and contrast is high, few foreign, without rubbing
Rub piece line etc.；But general light orientation needs to carry out cleaning, technique to the substance that oriented layer cracks after orientation
Step is complicated, process costs are high；Moreover, individually although light orientation has certain advantage relative to friction orientation, simultaneously
The problem of intermediate pixel is with bright spot and low contrast cannot be fully solved, Fig. 2 is individually shown in using the effect of light orientation.
Invention content
Technical solution is a kind of polyimides and preparation method thereof, photo-alignment layer combination used by solving the above problems
Object, the alignment method of photo-alignment layer, display device and preparation method thereof.
The present invention provides a kind of preparation method of polyimides, includes the following steps：
Tetra-atomic acid and diamine are subjected to reaction generation polyimide precursor；
The polyimide precursor and dihydric alcohol are subjected to reaction generation polyimides.
Preferably, in described the step of tetra-atomic acid and diamine are carried out reaction generation polyimide precursor, the quaternary
The amount ratio of sour and described diamine substance is 1：(0.5-2)；
In the described the step of polyimide precursor and dihydric alcohol are carried out reaction generation polyimides, the polyamides is sub-
The amount of amine precursor and glycol material ratio is 2：n；
Wherein, any integer values of the n between 800-2000.
Preferably, the tetra-atomic acid has following structure general formula：
The diamine has following structure general formula：
The polyimide precursor has following structure general formula：
Wherein, any integer values of the n between 800-2000；R1, R2, R3 are the alkane group that carbon atom number is 1-6；
The dihydric alcohol has following structure general formula：
The polyamides prepared it is another object of the present invention to provide a kind of preparation method using above-mentioned polyimides is sub-
Amine.
It is another object of the present invention to provide a kind of photo-alignment layer compositions, include the component of following mass parts：
Above-mentioned polyimides：5-10 mass parts；
N-Methyl pyrrolidone：50-70 mass parts；
Gamma-butyrolacton：5-20 mass parts；
Butyl cellosolve：10-20 mass parts.
It is another object of the present invention to provide a kind of alignment methods of photo-alignment layer, include the following steps:
Photo-alignment layer is formed in array substrate and/or color membrane substrates using above-mentioned photo-alignment layer composition；
The photo-alignment layer is irradiated under the polarised light of first wave length；
The photo-alignment layer is irradiated under the polarised light of second wave length；
Wherein, the first wave length and the second wave length are in the range of 100-450nm.
Preferably, the first wave length is 254nm, and the second wave length is 310nm.
Preferably, after photo-alignment layer is formed, the photo-alignment layer is carried out under the polarised light for carrying out first wave length
The step of friction orientation is carried out to the photo-alignment layer is further included before the step of irradiation.
Preferably, the step of friction orientation, which is included under following parameter, carries out friction orientation：
500-1500 revs/min of roller speed, board speed 10-30mm/s, roller compression distance 0.1-0.5mm.
It is another object of the present invention to provide a kind of preparation method of liquid crystal display device, using above-mentioned light orientation
The alignment method of layer carries out orientation to the oriented layer of liquid crystal display panel.
It is another object of the present invention to provide a kind of liquid crystal display devices, including liquid crystal display panel, the liquid crystal
Display panel is prepared using the preparation method of above-mentioned liquid crystal display device.
Polyimides provided by the invention and preparation method thereof, photo-alignment layer composition, the alignment method of photo-alignment layer, liquid
Crystal device and preparation method thereof, due to using the photo-alignment layer for including above-mentioned polyimides, need to only be carried out in light orientation
Light orientation can be completed in irradiation twice, saves cleaning, simplifies processing step, reduces process costs.
Description of the drawings
Fig. 1 is in the prior art individually using the orientation design sketch of oriented layer after friction orientation；
Fig. 2 is in the prior art individually using orientation design sketch of the light with oriented layer backward；
Fig. 3 is the preparation flow figure of polyimide precursor in the embodiment of the present invention 1；
Fig. 4 is the preparation flow figure of polyimides in the embodiment of the present invention 1；
Fig. 5 is the flow chart of the alignment method of photo-alignment layer in the embodiment of the present invention 4；
Fig. 6 is the friction orientation schematic diagram of photo-alignment layer in the embodiment of the present invention 5；
Fig. 7 is the design sketch after the friction orientation of photo-alignment layer in the embodiment of the present invention 5；
Fig. 8 is that first friction orientation and then again orientation design sketch of the light with oriented layer backward are used in the embodiment of the present invention 5；
Wherein, 1. substrate；2. photo-alignment layer；3. roller；31. villus.
Specific embodiment
For those skilled in the art is made to more fully understand technical scheme of the present invention, below in conjunction with the accompanying drawings and specific embodiment party
Formula is described in further detail the present invention.
The present embodiment provides a kind of preparation methods of polyimides
Tetra-atomic acid and diamine are subjected to reaction generation polyimide precursor；
The polyimide precursor and dihydric alcohol are subjected to reaction generation polyimides.
Embodiment 1：
As shown in Figure 3 and Figure 4, the present embodiment provides the preparation method of above-mentioned polyimides, include the following steps：
As shown in figure 3, by the amount ratio of substance it is 1 by tetra-atomic acid and diamine：(0.5-2) carries out condensation reaction generation polyamides
Imines precursor；The amount ratio that tetra-atomic acid and diamine press substance in the present embodiment is 1：1 is reacted.
As shown in figure 4, by the amount ratio of substance it is 2 by polyimide precursor and dihydric alcohol：It is sub- that n carries out reaction generation polyamides
Amine；
Wherein, any integer values of the n between 800-2000.N is 1000 in the present embodiment.
Above-mentioned reaction carries out under room temperature, stirring.
As a specific embodiment, following general structure may be used in the tetra-atomic acid：
Wherein, R1 is ethyl.
Following general structure may be used in the diamine：
Wherein, R2, R3 are respectively ethyl, positive third
Base.
Following general structure may be used in the polyimide precursor：
Wherein, any integer values of the n between 800-2000；N is 1000 in the present embodiment.
Following general structure may be used in the dihydric alcohol：
It is and above-mentioned anti-it should be understood that the functional group that reaction is participated in above-mentioned reaction step is hydroxyl, carboxyl, amino
Answer the number of the carbon atom of alkane group that functional group connects uncorrelated, usually, above-mentioned R1, R2, R3 can be carbon atom number
For the alkane group of 1-6, those skilled in the art can carry out according to the size for the molecular weight for finally wanting synthesis of polyimides
Selection, is not limited thereto；
After above-mentioned raw materials and proportioning is determined, those skilled in the art is referred to existing when carrying out operation
There is the preparation method of the polyimides of technology, this is no longer going to repeat them.
Embodiment 2：
The present embodiment provides a kind of polyimides prepared using the above method.
Due to using the photo-alignment layer for including above-mentioned polyimides, irradiation twice need to only being carried out in light orientation and can be completed
Light orientation saves cleaning, simplifies processing step, reduces process costs.
Embodiment 3：
The present embodiment provides a kind of photo-alignment layer compositions, include the component of following mass parts：
Above-mentioned polyimides：5-10 mass parts；
N-Methyl pyrrolidone：50-70 mass parts；
Gamma-butyrolacton：5-20 mass parts；
Butyl cellosolve：10-20 mass parts.
Specifically, 3 groups of photo-alignment layer compositions as shown in Table 1 are obtained by changing the mass parts of each component.
Specifically, the preparation method of photo-alignment layer composition can be by above-mentioned proportioning with rotating speed 1000r/min, stirring
2min can be prepared.
The component proportion of 13 groups of photo-alignment layer compositions of table
| Component | Photo-alignment layer composition 1 | Photo-alignment layer composition 2 | Photo-alignment layer composition 3 |
| Polyimides | 5 | 6 | 10 |
| The number of repeat unit of precursor in polyimides | 800 | 1500 | 2000 |
| N-Methyl pyrrolidone | 60 | 70 | 50 |
| Gamma-butyrolacton | 20 | 10 | 5 |
| Butyl cellosolve | 10 | 14 | 20 |
Embodiment 4：
The present embodiment provides a kind of alignment methods of photo-alignment layer, include the following steps:
Photo-alignment layer is formed in array substrate and/or color membrane substrates using above-mentioned photo-alignment layer composition；
The photo-alignment layer is irradiated under the polarised light of first wave length；
The photo-alignment layer is irradiated under the polarised light of second wave length；
Wherein, the first wave length and the second wave length are in the range of 100-450nm.
It should be understood that the specific value of above-mentioned first wave length and the second wave length in the range, it can basis
Specific photo-alignment layer composition molecular weight determines.
As shown in figure 5, the material under the irradiation of first wave length polarised light included by photo-alignment layer 2 generates cracking (alkyl
Ether bond rupture)；And the branch that generation is cracked under the irradiation of the polarised light of second wave length carries out volatilization removal (cyclic ethers key tear type
Into cyclopentanol), complete the orientation of photo-alignment layer.The polarizing light irradiation in different wavelength is only needed in above-mentioned light process of alignment
Lower progress does not need to the cracking substance to generation and carries out individual cleaning, saves orientation process step, reduces product
Cost of manufacture.
Further, the present embodiment provides a kind of alignment method of photo-alignment layer after photo-alignment layer is formed, to the light
It is further included before the step of both alignment layers are irradiated under the polarised light of first wave length and friction orientation is carried out to the photo-alignment layer
The step of.
Embodiment 5：
The present embodiment provides a kind of preparation method of liquid crystal display device, including the array substrate to liquid crystal display panel
And/or made on color membrane substrates the step of including the photo-alignment layer of above-mentioned photo-alignment layer composition and to above-mentioned photo-alignment layer into
The step of row friction orientation and light orientation.
Specifically,
S1, the photo-alignment layer for including above-mentioned photo-alignment layer composition is made simultaneously in array substrate and/or color membrane substrates
The method that coating may be used coats photo-alignment layer composition 3 in array substrate and color membrane substrates respectively, is formed
Photo-alignment layer 2, this is no longer going to repeat them for prior art scope for specific painting method.
Photo-alignment layer carries out friction orientation on S2, array substrate and color membrane substrates
As shown in fig. 6, prepare photo-alignment layer 2 on substrate 1, above-mentioned substrate 1 can be array substrate or color membrane substrates,
Friction orientation is rolled with roller 3 under the driving of power plant from a lateral opposite side of substrate 1, and the surface of roller 3 is equipped with suede
Hair 31, the villus 31 are used to be orientated photo-alignment layer 2；Specific friction orientation can carry out under following parameter：
500-1500 revs/min of roller speed, board speed 10-30mm/s, roller compression distance 0.1-0.5mm.
Design sketch of the liquid crystal molecule after friction orientation is as shown in Figure 7.
The condition of above-mentioned friction orientation is more soft, the particle of villus 31 will not be caused to come off, so as to influence orientation effect
Fruit.
S3, light orientation is carried out to the photo-alignment layer for passing through friction orientation
The photo-alignment layer is irradiated under the polarised light of first wave length；
The photo-alignment layer is irradiated under the polarised light of second wave length；
Specifically, the present embodiment uses the preparation photo-alignment layer of photo-alignment layer composition 3, and above-mentioned first wave length is
254nm, second wave length 310nm.
Photo-alignment layer material generates cracking in this way under the irradiation of the polarised light of 254nm；And the photograph of the polarised light in 310nm
It penetrates the branch that lower cracking generates and carries out volatilization removal, complete the orientation of photo-alignment layer.
Fig. 8 is shown in by the design sketch of friction orientation and light with photo-alignment layer backward, it is seen that match with by friction orientation and light
It is combined to two methods, reduces display device L0 brightness (grayscale is minimum for L0), improve contrast.
It should be understood that it is twice-oriented consistent by the way that the parameter that friction orientation is orientated with light orientation is controlled to make, it is common real
Now to the orientation of liquid crystal molecule.
Embodiment 6：
The present embodiment provides a kind of display devices, and including liquid crystal display panel, the liquid crystal display panel is using above-mentioned
Display device preparation method prepare.
It is understood that the principle that embodiment of above is intended to be merely illustrative of the present and the exemplary implementation that uses
Mode, however the present invention is not limited thereto.For those skilled in the art, in the essence for not departing from the present invention
In the case of refreshing and essence, various changes and modifications can be made therein, these variations and modifications are also considered as protection scope of the present invention.
Claims (9)
1. a kind of preparation method of polyimides, which is characterized in that include the following steps：
Tetra-atomic acid and diamine are subjected to reaction generation polyimide precursor；
The polyimide precursor and dihydric alcohol are subjected to reaction generation polyimides；
In described the step of tetra-atomic acid and diamine are carried out reaction generation polyimide precursor, the tetra-atomic acid and the binary
The amount ratio of amine substance is 1：(0.5-2)；
In the described the step of polyimide precursor and dihydric alcohol are carried out reaction generation polyimides, before the polyimides
The amount of body and glycol material ratio is 2：n；
Wherein, any integer values of the n between 800-2000；
The tetra-atomic acid has following structure general formula：
The diamine has following structure general formula：
The polyimide precursor has following structure general formula：
Wherein, any integer values of the n between 800-2000；R1, R2, R3 are the alkane group that carbon atom number is 1-6；
The dihydric alcohol has following structure general formula：
2. a kind of polyimides, which is characterized in that the polyimides is prepared using the method as described in claim 1
's.
3. a kind of photo-alignment layer composition, which is characterized in that include the component of following mass parts：
Polyimides as claimed in claim 2：5-10 mass parts；
N-Methyl pyrrolidone：50-70 mass parts；
Gamma-butyrolacton：5-20 mass parts；
Butyl cellosolve：10-20 mass parts.
4. a kind of alignment method of photo-alignment layer, which is characterized in that include the following steps:
Photo-alignment layer is formed in array substrate and/or color membrane substrates using photo-alignment layer composition as claimed in claim 3；
The photo-alignment layer is irradiated under the polarised light of first wave length；
The photo-alignment layer is irradiated under the polarised light of second wave length；
Wherein, the first wave length and the second wave length are in the range of 100-450nm.
5. the alignment method of photo-alignment layer as claimed in claim 4, which is characterized in that the first wave length is 254nm, described
Second wave length is 310nm.
6. the alignment method of photo-alignment layer as claimed in claim 4, which is characterized in that after photo-alignment layer is formed, to institute
It further includes before stating the step of photo-alignment layer is irradiated under the polarised light of first wave length and rubs to the photo-alignment layer
The step of orientation.
7. the alignment method of photo-alignment layer as claimed in claim 6, which is characterized in that the step of friction orientation is included in
Friction orientation is carried out under following parameter：
500-1500 revs/min of roller speed, board speed 10-30mm/s, roller compression distance 0.1-0.5mm.
8. a kind of preparation method of liquid crystal display device, which is characterized in that matched using such as claim 4-7 any one of them light
Orientation is carried out to the oriented layer of liquid crystal display panel to the alignment method of layer.
9. a kind of liquid crystal display device, including liquid crystal display panel, which is characterized in that the liquid crystal display panel is used as weighed
Profit requires prepared by the preparation method of the liquid crystal display device described in 8.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101671250A (en) * | 2008-08-18 | 2010-03-17 | Lg化学株式会社 | Norbornene monomer, polynorbornene derivative, liquid crystal photoalignment film containing the same and liquid crystal display containing the same |
| CN102858849A (en) * | 2010-04-23 | 2013-01-02 | 罗利克有限公司 | Photoaligning material |
| TW201533094A (en) * | 2013-10-23 | 2015-09-01 | Nissan Chemical Ind Ltd | Liquid crystal aligning agent, liquid crystal alignment film and liquid crystal display element |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4178920B2 (en) * | 2001-12-03 | 2008-11-12 | セイコーエプソン株式会社 | Alignment film, method for forming alignment film, liquid crystal device, and projection display device |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101671250A (en) * | 2008-08-18 | 2010-03-17 | Lg化学株式会社 | Norbornene monomer, polynorbornene derivative, liquid crystal photoalignment film containing the same and liquid crystal display containing the same |
| CN102858849A (en) * | 2010-04-23 | 2013-01-02 | 罗利克有限公司 | Photoaligning material |
| TW201533094A (en) * | 2013-10-23 | 2015-09-01 | Nissan Chemical Ind Ltd | Liquid crystal aligning agent, liquid crystal alignment film and liquid crystal display element |
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