CN105182618A - Preparation methods for PI (Polyimide) and LCD (Liquid Crystal Display), as well as optical alignment layer composition and optical alignment layer alignment method - Google Patents
Preparation methods for PI (Polyimide) and LCD (Liquid Crystal Display), as well as optical alignment layer composition and optical alignment layer alignment method Download PDFInfo
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- CN105182618A CN105182618A CN201510674347.9A CN201510674347A CN105182618A CN 105182618 A CN105182618 A CN 105182618A CN 201510674347 A CN201510674347 A CN 201510674347A CN 105182618 A CN105182618 A CN 105182618A
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1337—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 invention provides polyimide and a preparation method thereof, as well as an optical alignment layer composition, an optical alignment layer alignment method, a liquid crystal display device and a preparation method for the liquid crystal display, and aims to solve the problems that the contrast gradient of oriented orientation layers is low, and a bright spot is generated in the prior art. According to the polyimide and the preparation method thereof, as well as the optical alignment layer composition, the optical alignment layer alignment method, the liquid crystal display device and the preparation method for the liquid crystal display, as optical alignment layers of the polyimide are adopted, optical alignment can be realized so long as twice irradiations are performed during optical alignment, a cleaning process is eliminated, process procedures are simplified, and the process cost is reduced.
Description
Technical field
The present invention relates to display technique field, particularly, relate to the alignment method, liquid crystal indicator and preparation method thereof of a kind of polyimide and preparation method thereof, photo-alignment layer composition, photo-alignment layer.
Background technology
Thin-film transistor LCD device (ThinFilmTransistorLiquidCrystalDisplay, TFT-LCD), be widely used in the various aspects of our life, from undersized mobile phone, video camera, digital camera, the notebook computer of middle size, desktop computer, large-sized domestic TV is to large-scale projector equipment etc., liquid crystal indicator is not only light, thin, and the cathode-ray tube display (CathodeRayTube also progressively matching in excellence or beauty traditional in image quality and response speed, CRT), TFT-LCD has substituted CRT becomes main flow, price also have dropped a lot, and popularize fully.
Thin-film transistor LCD device suitability for industrialized production generally comprises array processes, color membrane process, molding process, module technique.
Allocating process is molding process important component part, and allocating process is divided into traditional friction process and light allocating process.
Conventional friction technique is because friction roller is in the friction process of oriented layer, and the particle on roller can produce and to come off and limited in rough and uneven in surface place orientation effect, produces bright spot, reduces contrast, adopt separately the orientation effect of friction process as shown in Figure 1.
Light orientation (OpticalAlignment) utilizes the oriented layer comprising specific polyimide (Polyimide, PI) material, uses the ultraviolet light of specific direction to carry out irradiating the initial orientation forming oriented layer.
Light orientation is the ultraviolet source irradiation oriented layer utilizing anisotropy energy, make the macromolecular structure on oriented layer surface that the photopolymerization of uneven tropism, conversion or cracking reaction occur, film surface is caused to produce the Van der Waals force of anisotropy distribution, and then induction Liquid Crystal Molecules Alignment.
It is strong that light orientation is mainly reflected in antistatic effect relative to the advantage of friction orientation, and contrast is high, few foreign, without aspects such as friction stripeds; But general light orientation needs to carry out cleaning to the material of oriented layer cracking after orientation, processing step is complicated, process costs is high; And, although independent light orientation has certain advantage relative to friction orientation, intermediate pixel can not be solved completely there is bright spot and the low problem of contrast, adopt separately the effect of light orientation to see Fig. 2.
Summary of the invention
The adopted technical scheme that solves the problem is the alignment method, display device and preparation method thereof of a kind of polyimide and preparation method thereof, photo-alignment layer composition, photo-alignment layer.
The invention provides a kind of preparation method of polyimide, comprise the following steps:
Tetra-atomic acid and diamine are carried out reaction and generate polyimide precursor;
Described polyimide precursor and dibasic alcohol are carried out reaction and generate polyimide.
Preferably, describedly tetra-atomic acid and diamine are carried out reacting in the step generating polyimide precursor, described tetra-atomic acid and described diamine amount of substance are than being 1:(0.5-2);
Describedly described polyimide precursor and dibasic alcohol are carried out reacting in the step generating polyimide, the amount of described polyimide precursor and described glycol material is than being 2:n;
Wherein, n is any integer value between 800-2000.
Preferably, described tetra-atomic acid has following general structure:
Described diamine has following general structure:
Described polyimide precursor has following general structure:
Wherein, n is any integer value between 800-2000; R1, R2, R3, for carbon number is the alkane group of 1-6;
Described dibasic alcohol has following general structure:
Another object of the present invention is to provide a kind of polyimide adopting the preparation method of above-mentioned polyimide to prepare.
Another object of the present invention is to provide a kind of photo-alignment layer composition, comprises the component of following mass parts:
Above-mentioned polyimide: 5-10 mass parts;
1-METHYLPYRROLIDONE: 50-70 mass parts;
Gamma-butyrolacton: 5-20 mass parts;
Butyl cellosolve: 10-20 mass parts.
Another object of the present invention is the alignment method providing a kind of photo-alignment layer, comprises the following steps:
Above-mentioned photo-alignment layer composition is adopted to form photo-alignment layer on array base palte and/or color membrane substrates;
Under the polarized light of first wave length, irradiation is carried out to described photo-alignment layer;
Under the polarized light of second wave length, irradiation is carried out to described photo-alignment layer;
Wherein, described first wave length and described second wave length are within the scope of 100-450nm.
Preferably, described first wave length is 254nm, and described second wave length is 310nm.
Preferably, after formation photo-alignment layer, before described photo-alignment layer being carried out under the polarized light carrying out first wave length to the step of irradiation, the step of described photo-alignment layer being carried out to friction orientation is also comprised.
Preferably, the step of described friction orientation carries out friction orientation under being included in following parameter:
Roller speed 500-1500 rev/min, board speed 10-30mm/s, roller compression distance 0.1-0.5mm.
Another object of the present invention is the preparation method providing a kind of liquid crystal indicator, adopts the alignment method of above-mentioned photo-alignment layer to carry out orientation to the oriented layer of display panels.
Another object of the present invention is to provide a kind of liquid crystal indicator, comprises display panels, and described display panels adopts the preparation method of above-mentioned liquid crystal indicator to prepare.
The alignment method, liquid crystal indicator and preparation method thereof of polyimide provided by the invention and preparation method thereof, photo-alignment layer composition, photo-alignment layer, owing to adopting the photo-alignment layer comprising above-mentioned polyimide, only need carry out twice irradiation when light orientation can complete light orientation, saves cleaning, simplifies processing step, reduces process costs.
Accompanying drawing explanation
Fig. 1 is the orientation design sketch of oriented layer after independent employing friction orientation in prior art;
Fig. 2 is the orientation design sketch of oriented layer after the orientation of independent employing light in prior art;
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 polyimide in the embodiment of the present invention 1;
Fig. 5 is the process flow diagram 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 the orientation design sketch adopting oriented layer after first friction orientation and then light orientation in the embodiment of the present invention 5;
Wherein, 1. substrate; 2. photo-alignment layer; 3. roller; 31. fine hair.
Embodiment
For making those skilled in the art understand technical scheme of the present invention better, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
The present embodiment provides a kind of preparation method of polyimide
Tetra-atomic acid and diamine are carried out reaction and generate polyimide precursor;
Described polyimide precursor and dibasic alcohol are carried out reaction and generate polyimide.
Embodiment 1:
As shown in Figure 3 and Figure 4, the present embodiment provides the preparation method of above-mentioned polyimide, comprises the following steps:
As shown in Figure 3, tetra-atomic acid and diamine are compared for 1:(0.5-2 by amount of substance) carry out condensation reaction generation polyimide precursor; In the present embodiment, tetra-atomic acid and diamine react than for 1:1 by amount of substance.
As shown in Figure 4, polyimide precursor and dibasic alcohol are generated polyimide by amount of substance than carrying out reaction for 2:n;
Wherein, n is any integer value between 800-2000.In the present embodiment, n is 1000.
Above-mentioned reaction is all carried out under normal temperature, stirring.
As a concrete embodiment, described tetra-atomic acid can adopt following general structure:
wherein, R1 is ethyl.
Described diamine can adopt following general structure:
wherein, R2, R3 are respectively ethyl, n-pro-pyl.
Described polyimide precursor can adopt following general structure:
Wherein, n is any integer value between 800-2000; In the present embodiment, n is 1000.
Described dibasic alcohol can adopt following general structure:
Should be understood that, the functional group participating in above-mentioned reactions steps reacting is hydroxyl, carboxyl, amino, the number of the carbon atom of the alkane group be connected with above-mentioned reactive functionality is uncorrelated, usually, above-mentioned R1, R2, R3, can be the alkane group of 1-6 for carbon number, those skilled in the art can according to finally wanting the size of the molecular weight of synthesis of polyimides to select, in this no limit;
After determining above-mentioned raw materials and proportioning, those skilled in the art, can with reference to the preparation method of the polyimide of prior art when carrying out operation, and this is no longer going to repeat them.
Embodiment 2:
The present embodiment provides a kind of polyimide adopting said method to prepare.
Owing to adopting the photo-alignment layer comprising above-mentioned polyimide, only need carry out twice irradiation when light orientation can complete light orientation, saves cleaning, simplifies processing step, reduces process costs.
Embodiment 3:
The present embodiment provides a kind of photo-alignment layer composition, comprises the component of following mass parts:
Above-mentioned polyimide: 5-10 mass parts;
1-METHYLPYRROLIDONE: 50-70 mass parts;
Gamma-butyrolacton: 5-20 mass parts;
Butyl cellosolve: 10-20 mass parts.
Particularly, the mass parts by changing each component obtains 3 groups of photo-alignment layer compositions as shown in table 1.
Particularly, the preparation method of photo-alignment layer composition can by above-mentioned proportioning with rotating speed 1000r/min, and stirring 2min can be prepared.
The component proportion of table 13 group photo-alignment layer composition
| Component | Photo-alignment layer composition 1 | Photo-alignment layer composition 2 | Photo-alignment layer composition 3 |
| Polyimide | 5 | 6 | 10 |
| The number of repeat unit of precursor in polyimide | 800 | 1500 | 2000 |
| 1-METHYLPYRROLIDONE | 60 | 70 | 50 |
| Gamma-butyrolacton | 20 | 10 | 5 |
| Butyl cellosolve | 10 | 14 | 20 |
Embodiment 4:
The present embodiment provides a kind of alignment method of photo-alignment layer, comprises the following steps:
Above-mentioned photo-alignment layer composition is adopted to form photo-alignment layer on array base palte and/or color membrane substrates;
Under the polarized light of first wave length, irradiation is carried out to this photo-alignment layer;
Under the polarized light of second wave length, irradiation is carried out to this photo-alignment layer;
Wherein, described first wave length and described second wave length are within the scope of 100-450nm.
Should be understood that, above-mentioned first wave length and the described second wave length concrete value within the scope of this, can determine according to concrete photo-alignment layer composition molecular weight.
As shown in Figure 5, the material under the irradiation of first wave length polarized light included by photo-alignment layer 2 produces cracking (alkyl ether bond rupture); And the side chain that cracking produces under the irradiation of the polarized light of second wave length carries out volatilization removal (cyclic ethers bond rupture forms cyclopentanol), complete the orientation of photo-alignment layer.Only need in above-mentioned light process of alignment to carry out under the polarizing light irradiation of different wavelength, not needing the cracking material to producing to carry out independent cleaning, saving orientation process step, reducing the cost of manufacture of product.
Further, the present embodiment provides a kind of alignment method of photo-alignment layer after formation photo-alignment layer, also comprises the step of described photo-alignment layer being carried out to friction orientation before this photo-alignment layer being carried out under the polarized light of first wave length to the step of irradiation.
Embodiment 5:
The present embodiment provides a kind of preparation method of liquid crystal indicator, comprises and comprises the step of the photo-alignment layer of above-mentioned photo-alignment layer composition to the array base palte of display panels and/or color membrane substrates make and above-mentioned photo-alignment layer carried out to the step of friction orientation and light orientation.
Particularly,
S1, array base palte and/or color membrane substrates make simultaneously comprise the photo-alignment layer of above-mentioned photo-alignment layer composition
The method of coating can be adopted on array base palte and color membrane substrates, to apply photo-alignment layer composition 3 respectively, and form photo-alignment layer 2, concrete painting method is that this is no longer going to repeat them for prior art category.
On S2, array substrate and color membrane substrates, photo-alignment layer carries out friction orientation
As shown in Figure 6, prepare photo-alignment layer 2 on substrate 1, above-mentioned substrate 1 can be array base palte or color membrane substrates, friction orientation roller 3 rolls from the side of substrate 1 to opposite side under the driving of propulsion system, the surface of roller 3 is provided with fine hair 31, and this fine hair 31 is for carrying out orientation to photo-alignment layer 2; Concrete friction orientation can carry out under following parameter:
Roller speed 500-1500 rev/min, board speed 10-30mm/s, roller compression distance 0.1-0.5mm.
The design sketch of liquid crystal molecule after friction orientation as shown in Figure 7.
The particle detachment that the condition of above-mentioned friction orientation is comparatively soft, can not cause fine hair 31, thus affect orientation effect.
S3, light orientation is carried out to the photo-alignment layer through friction orientation
Under the polarized light of first wave length, irradiation is carried out to described photo-alignment layer;
Under the polarized light of second wave length, irradiation is carried out to described photo-alignment layer;
Particularly, the present embodiment adopts the preparation photo-alignment layer of photo-alignment layer composition 3, and above-mentioned first wave length is 254nm, and second wave length is 310nm.
Under the irradiation of the polarized light of 254nm, photo-alignment layer material produces cracking like this; And the side chain that cracking produces under the irradiation of the polarized light of 310nm carries out volatilization removal, complete the orientation of photo-alignment layer.
Fig. 8 is seen by the design sketch of the photo-alignment layer after friction orientation and light orientation, visible with by friction orientation and light orientation two kinds of methods combining, reduce display device L0 brightness (GTG minimum be L0), improve contrast.
Should be understood that, making twice-oriented consistent by controlling friction orientation with the parameter of light orientation orientation, jointly realizing the orientation to liquid crystal molecule.
Embodiment 6:
The present embodiment provides a kind of display device, comprises display panels, and described display panels adopts the preparation method of above-mentioned display device to prepare.
Be understandable that, the illustrative embodiments that above embodiment is only used to principle of the present invention is described and adopts, but the present invention is not limited thereto.For those skilled in the art, without departing from the spirit and substance in the present invention, can make various modification and improvement, these modification and improvement are also considered as protection scope of the present invention.
Claims (11)
1. a preparation method for polyimide, is characterized in that, comprises the following steps:
Tetra-atomic acid and diamine are carried out reaction and generate polyimide precursor;
Described polyimide precursor and dibasic alcohol are carried out reaction and generate polyimide.
2. the preparation method of polyimide as claimed in claim 1, is characterized in that,
Describedly tetra-atomic acid and diamine are carried out reacting in the step generating polyimide precursor, described tetra-atomic acid and described diamine amount of substance are than being 1:(0.5-2);
Describedly described polyimide precursor and dibasic alcohol are carried out reacting in the step generating polyimide, the amount of described polyimide precursor and described glycol material is than being 2:n;
Wherein, n is any integer value between 800-2000.
3. the preparation method of polyimide as claimed in claim 2, it is characterized in that, described tetra-atomic acid has following general structure:
Described diamine has following general structure:
Described polyimide precursor has following general structure:
Wherein, n is any integer value between 800-2000; R1, R2, R3, for carbon number is the alkane group of 1-6;
Described dibasic alcohol has following general structure:
4. a polyimide, is characterized in that, described polyimide adopts the method as described in claim 1-3 to prepare.
5. a photo-alignment layer composition, is characterized in that, comprises the component of following mass parts:
Polyimide as claimed in claim 4: 5-10 mass parts;
1-METHYLPYRROLIDONE: 50-70 mass parts;
Gamma-butyrolacton: 5-20 mass parts;
Butyl cellosolve: 10-20 mass parts.
6. an alignment method for photo-alignment layer, is characterized in that, comprises the following steps:
Photo-alignment layer composition as claimed in claim 5 is adopted to form photo-alignment layer on array base palte and/or color membrane substrates;
Under the polarized light of first wave length, irradiation is carried out to described photo-alignment layer;
Under the polarized light of second wave length, irradiation is carried out to described photo-alignment layer;
Wherein, described first wave length and described second wave length are within the scope of 100-450nm.
7. the alignment method of photo-alignment layer as claimed in claim 6, it is characterized in that, described first wave length is 254nm, and described second wave length is 310nm.
8. the alignment method of photo-alignment layer as claimed in claim 6, it is characterized in that, after formation photo-alignment layer, before described photo-alignment layer being carried out under the polarized light of first wave length to the step of irradiation, also comprise the step of described photo-alignment layer being carried out to friction orientation.
9. the alignment method of photo-alignment layer as claimed in claim 8, is characterized in that, carries out friction orientation under the step of described friction orientation is included in following parameter:
Roller speed 500-1500 rev/min, board speed 10-30mm/s, roller compression distance 0.1-0.5mm.
10. a preparation method for liquid crystal indicator, is characterized in that, adopts the alignment method of the photo-alignment layer as described in any one of claim 6-9 to carry out orientation to the oriented layer of display panels.
11. 1 kinds of liquid crystal indicators, comprise display panels, it is characterized in that, described display panels adopts the preparation method of liquid crystal indicator as claimed in claim 10 to prepare.
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| CN201510674347.9A CN105182618B (en) | 2015-10-16 | 2015-10-16 | The preparation method of PI, LCD and the two, photo-alignment layer composition, alignment method |
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|---|---|---|---|---|
| US20040080685A1 (en) * | 2001-12-03 | 2004-04-29 | Seiko Epson Corporation | Alignment film, method for fabricating the alignment film, liquid crystal device, and projection type display device |
| 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 |
-
2015
- 2015-10-16 CN CN201510674347.9A patent/CN105182618B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040080685A1 (en) * | 2001-12-03 | 2004-04-29 | Seiko Epson Corporation | Alignment film, method for fabricating the alignment film, liquid crystal device, and projection type display device |
| 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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