CN109239983A - A kind of alignment film method for alignment, orientation ilm substrate and display panel - Google Patents
A kind of alignment film method for alignment, orientation ilm substrate and display panel Download PDFInfo
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- CN109239983A CN109239983A CN201811424555.3A CN201811424555A CN109239983A CN 109239983 A CN109239983 A CN 109239983A CN 201811424555 A CN201811424555 A CN 201811424555A CN 109239983 A CN109239983 A CN 109239983A
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- film layer
- alignment
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- orientation
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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
- G02F1/13378—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 discloses a kind of alignment film method for alignment, this method comprises: forming the first film layer on substrate；The second film layer is prepared above first film layer；2D pattern is drawn in second film layer using laser light source；First film layer and second film layer are heated to the glass transition temperature of first film layer or more, to form alignment film；Wherein, the Young's modulus of first film layer is less than the Young's modulus of second film layer.The embodiment of the present invention guides the heating expansion path of film using laser direct-writing 2D pattern, to prepare the liquid crystal aligning plate that guidance liquid crystal realizes arbitrary graphic patternization orientation.This method solve visual angle caused by tradition machinery friction orientation method it is small and friction bring a series of problems, it is suitable for mass production and low in cost compared with the image conversion liquid crystal aligning method for being currently in the scientific research stage.
Description
Technical field
The present embodiments relate to liquid crystal aligning technology more particularly to a kind of alignment film method for alignment, orientation ilm substrate and
Display panel.
Background technique
With scientific and technological information industry high development, visualization is increasingly becoming the joint demand of various industries, currently on the market
90% or more display equipment uses liquid crystal display.But liquid crystal display there is a problem of one it is bigger be exactly visual angle compared with
It is small, i.e., the fuzzy pictures under angle of squint, or even can not identify image, this has seriously affected the visual experience of consumer.
This is because the liquid crystal aligning method that display screen industrial chain uses at present is mainly mechanical friction alignment method.The method
Mainly by the way that flannelette packet outside roller, is rolled roller, it will appear list on the polymeric substrates such as polyimides of lower contact
To micro- ditch that rubs, while but also the strand of polymer generates anisotropy, so that the liquid crystal poured into after induction is according to poly-
The direction object Wei Gou orientation is closed, the liquid crystal of single direction orientation is formed.Due to the birefringence of liquid crystal, lead to the light transmission of liquid crystal device
Property is strongly depend on observation method；Therefore the liquid crystal display device visual angle that such method obtains is relatively narrow.While friction orientation is also
There are problems: contact friction may destroy side transistor under polymer；Contact friction can remain flannelette soft flocks, influence to shield
Screen display effect etc..
Image conversion liquid crystal aligning technology can improve single liquid crystal aligning, and guidance liquid crystal realizes arbitrary graphicization orientation,
It is effective to improve the small defect in liquid crystal display visual angle.Mainly there is contact figure in the graphical orientation technology in scientific research stage at present
Pictureization liquid crystal aligning method and non-contact image liquid crystal aligning method.Contact type image liquid crystal aligning method mainly includes
Double rub, micro tribology and atomic force microscope friction；Although these technologies improve single liquid crystal aligning direction, and by pattern
Change the size reduction of liquid crystal aligning to the region of tens-several 100 nanometer level, but these belong to friction orientation scope, still
Above-mentioned relevant issues caused by the presence of rubbing.Contactless liquid crystal image method for alignment is mainly process for optical alignment at present.Using
The chemical material film that can produce light isomery, photo-crosslinking after illumination irradiates to generate different liquid using source region
Brilliant orientation pattern.Although such method solves the small defect in liquid crystal display visual angle simultaneously, while also avoiding friction and bringing
A series of problems.But thin-film material is more harsh to light source requirements in such method, it usually needs selection photosensitive group generates
For the optical region of reaction as light source, this proposes some challenges for the flexibility of production.
Summary of the invention
The present invention provides a kind of alignment film method for alignment, orientation ilm substrate and display panel, realizes the Subgraph of liquid crystal
Shapeization orientation avoids contact with formula friction bring relevant issues and fits in combination with industrialized 2D plane micro-processing technology
It is preferably mass produced and low in cost.
In a first aspect, the embodiment of the invention provides a kind of alignment film method for alignment, this method comprises:
The first film layer is formed on substrate；
The second film layer is prepared above first film layer；
2D pattern is drawn in second film layer using laser light source；
First film layer and second film layer are heated to the glass transition temperature of first film layer or more, to be formed
Alignment film；
Wherein, the Young's modulus of first film layer is less than the Young's modulus of second film layer.
Second aspect, the embodiment of the invention also provides a kind of orientation ilm substrate, which uses first aspect
The alignment film method for alignment prepares to be formed.
The third aspect, the embodiment of the invention also provides a kind of display panel, which includes described in second aspect
Orientation ilm substrate.
The present invention provides a kind of alignment film method for alignment, and this method is schemed using the 2D that laser draws setting in the second film layer
Case, the photothermy after the second film layer of laser irradiation cause the variation of the Young's modulus of the second film material, when the first film layer and
When second film layer is heated to the glass transition temperature of the first film layer or more, the first film layer realizes 3D fold.Such 3D structure can be right
Liquid crystal is orientated.By the type and thickness that change the double-deck membrane material, thus it is possible to vary the periodic structure of fold.Such method knot
Industrialized conventional two-dimensional plane pattern control is closed, suitable for producing is extensive, inexpensive patterning orientation substrate.
Detailed description of the invention
Fig. 1 is the flow diagram of alignment film method for alignment in the embodiment of the present invention one；
Fig. 2 is the alignment film substrate layer structural schematic diagram in the embodiment of the present invention four；
Fig. 3 is the schematic diagram of the laser light source drafting 2D pattern in the embodiment of the present invention four；
Fig. 4 is that the 3D fold in the embodiment of the present invention four forms schematic diagram；
Fig. 5 is that 90 ° of twisted nematic liquid crystals orientation in the embodiment of the present invention four is orientated schematic diagram with parallel nematic liquid crystal.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention rather than limiting the invention.It also should be noted that in order to just
Only the parts related to the present invention are shown in description, attached drawing rather than entire infrastructure.
Embodiment one
Fig. 1 is the alignment film method for alignment that the embodiment of the present invention one provides, as shown in Figure 1, the alignment film method for alignment packet
Include following steps:
S101, the first film layer is formed on substrate；
Such as it can be then annealed to be formed by curing the first film layer by the first film layer solution coating on substrate.It anneals
To the effect of evaporation solvent cures film.Substrate can choose glass, silicon wafer or plastics, depend primarily on use demand, modeling
Expect that substrate is bent, adapts to flexible development scheme.If should be noted to select plastic base, the glass transition temperature of plastics is wanted
Higher than the glass transition temperature of the first film layer, causes the vitrifying of substrate to change when to avoid heating, the accumulation of the first film layer is answered
Power has an impact.First film layer can use polystyrene or dimethyl silicone polymer, utilize coating or InkJet printing processes
Preparation is on substrate.
S102, the second film layer is prepared above the first film layer；
Second film layer can be prepared in the top of the first film layer using electron beam evaporation plating, magnetron sputtering or hot evaporation mode,
Wherein Young's modulus of the Young's modulus of the first film layer less than the second film layer.Second film layer can be biggish hard using Young's modulus
Matter metal such as Au, Ag, Cu or nonmetallic materials such as Si, C.For the higher requirement of fine structure degree, the crystalline substances such as In, Sn can be selected
The tiny metal of grain.In addition, the second film layer can also use polymer material.As long as it is bigger than the first film layer Young's modulus and
The material of film easy to form can be used as the second film material.
S103,2D pattern is drawn in the second film layer using laser light source；
Write two dimensional motion program, surface rendering 2D pattern of the control laser head in the second film layer.The second film of laser irradiation
Photothermy is generated after layer, causes the variation of the second film material Young's modulus, leads to rising for the first film layer of irradiation area lower layer
The stress that wrinkles is lower than other non-irradiated regions.By selecting appropriate thermal stress, it is made to be in irradiation area corrugation stress and non-irradiated
Region wrinkles between stress, so that fold growth is graphically carried out mainly along irradiation area, to obtain 3D fold.It is logical
Crossing control pattern can change laser irradiation path, realize the fold guidance of different pattern.
S104, the first film layer and the second film layer are heated to the glass transition temperature of the first film layer or more, to form alignment film；
Heating temperature is greater than the glass transition temperature of the first film material, keeps vitrified polymer uniform change high-elastic
State, expansion generates 3D pleated pattern under the guidance of the second film layer 2D pattern, therefore specific heating temperature will be according to selection
First film material appropriate adjustment.By selecting heating temperature appropriate, thermal stress is made to be in laser-irradiated domain corrugation stress
Between non-irradiated region corrugation stress, so that fold be made to grow mainly along irradiation area figure, obtains the formation of 3D fold and match
To film.Change laser irradiation path drawing different pattern by control, realizes the fold guidance of different pattern, obtain different match
To film.
Optionally, laser light source is tunable laser source, by controlling the output power of laser light source, changes laser
Intensity, and then regulate and control the size of the second film layer Young's modulus variable quantity.
Optionally, the thickness range of first film layer is 50-200nm.
Optionally, the thickness range of second film layer is 5-10nm.
The periodicity of the thickness and 2D pattern of the periodicity of 3D pleated pattern and the double-deck membrane material has direct relation.First film
The thickness of layer can be by the rotation speed for the concentration and spin coater that polymer dissolves in corresponding solvent or the time of inkjet printing
Control.The thickness of second film layer can be controlled by adjusting the various technological parameters in preparation process.Due to the thickness of duplicature
Degree will affect the final 3D fold period, therefore specific thicknesses of layers will determine according to the actual situation.By optimizing duplicature
The thickness and type of material, the resolution ratio of 3D pleated pattern can achieve 100nm.
The embodiment of the present invention draws 2D pattern by two dimensional motion process control laser on the second film material, laser
Photothermy makes the Young's modulus of the second film material irradiated area change, and proper temperature is chosen, after whole heating
2D pattern guides the expansion path of film, generates 3D fold, forms alignment film.By the type, the thickness that change the double-deck membrane material
And the periodicity of 2D pattern, thus it is possible to vary the periodic structure of 3D fold forms the phase matching film of different orientation.This method combines
It is controlled through industrialized conventional two-dimensional plane pattern, suitable for producing is extensive, has precision high, flexible gradual change, low-cost
Advantage.
Embodiment two
The embodiment of the invention provides a kind of orientation ilm substrates, using the alignment film method for alignment preparation in embodiment one
At.
Orientation ilm substrate provided by the embodiment of the present invention uses double membrane structure, utilizes non-contact pattern method system
Make, realize the arbitrary graphic patternization orientation of liquid crystal, while avoiding contact-type frictional bring relevant issues, passes through optimization technique
The production of the orientation ilm substrate in nanoscale fold period may be implemented in parameter.
Embodiment three
The embodiment of the invention provides a kind of display panel, which includes the orientation ilm substrate in embodiment two.
Compared with traditional display panel, visual angle becomes larger display panel in the embodiment of the present invention, greatly improves user
Visual experience, while the orientation ilm substrate of display panel is made using contactless mode, and avoiding contact friction can
It existing can destroy the problem of side transistor and residual villus soft flocks etc. influence display effect under phase matching film substrate.
Example IV
In order to better illustrate the present invention, it is easy to understand technical solution of the present invention, of the invention is typical but non-limiting
Embodiment is as follows:
Spin coating polystyrene/toluene solution on glass substrate 201, wherein 201 thickness 1cm of substrate, the rotation of polystyrene
Thickness 100nm is applied, then 80 DEG C of annealing 12h, forms the first film layer 202.Electron beam evaporation is used above the first film layer
Layer of Au film 203 is prepared, the thickness of Au film 203 is about 10nm, obtains structure shown in Fig. 2.
Two dimensional motion program is write, the motion path of laser light source is controlled, with reference to Fig. 3, in 203 surface rendering 2D of Au film
Pattern, for laser irradiation on 203 surface of Au film, the heat of generation can change the Young's modulus of irradiation area Au film at this time.
As shown in figure 4, being heated to the glass transition temperature of the first film layer 202 or more, the first film layer 202 generates thermal expansion, by
Au film 203 guides, and forms the three-dimensional extension of 2D pattern, forms alignment film.
As shown in figure 5, thering is the orientation ilm substrate of orientation effect to be made into liquid crystal cell according to above step is processed two panels, lead to
It crosses capillarity and pours into nematic liquid crystal, be the corresponding optical phenomena of 2D pattern of visible write-in under petrographic microscope.It utilizes
The twisted nematic liquid crystal box and parallel nematic liquid crystal box that this structure is made into.
Note that the above is only a better embodiment of the present invention and the applied technical principle.It will be appreciated by those skilled in the art that
The invention is not limited to the specific embodiments described herein, be able to carry out for a person skilled in the art it is various it is apparent variation,
It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out by above embodiments to the present invention
It is described in further detail, but the present invention is not limited to the above embodiments only, without departing from the inventive concept, also
It may include more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.
Claims (13)
1. a kind of alignment film method for alignment characterized by comprising
The first film layer is formed on substrate；
The second film layer is prepared above first film layer；
2D pattern is drawn in second film layer using laser light source；
First film layer and second film layer are heated to the glass transition temperature of first film layer or more, to form orientation
Film；
Wherein, the Young's modulus of first film layer is less than the Young's modulus of second film layer.
2. alignment film method for alignment according to claim 1, which is characterized in that described to form the first film layer packet on substrate
It includes:
The first film layer solution is formed on the substrate；
Annealing is formed by curing first film layer.
3. alignment film method for alignment according to claim 1, which is characterized in that the substrate uses glass, silicon wafer or modeling
Material.
4. alignment film method for alignment according to claim 1, which is characterized in that first film layer include polystyrene or
Person's dimethyl silicone polymer.
5. alignment film method for alignment according to claim 1, which is characterized in that second film layer include Au, Ag, Cu,
In, Sn, Si or C.
6. alignment film method for alignment according to claim 3, which is characterized in that the glass transition temperature of the plastics is higher than institute
State the glass transition temperature of the first film layer.
7. alignment film method for alignment according to claim 1, which is characterized in that using electron beam evaporation plating, magnetron sputtering or
Hot evaporation mode prepares the second film layer above first film layer.
8. alignment film method for alignment according to claim 1, which is characterized in that using coating or InkJet printing processes in base
The first film layer is formed on plate.
9. alignment film method for alignment according to claim 1, which is characterized in that the laser light source is tunable laser light
Source.
10. alignment film method for alignment according to claim 1, which is characterized in that the thickness range of first film layer is
50-200nm。
11. alignment film method for alignment according to claim 1, which is characterized in that the thickness range of second film layer is
5-10nm。
12. a kind of orientation ilm substrate, which is characterized in that use alignment film method for alignment of any of claims 1-11
Preparation is formed.
13. a kind of display panel, which is characterized in that including the orientation ilm substrate described in claim 12.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811424555.3A CN109239983A (en) | 2018-11-27 | 2018-11-27 | A kind of alignment film method for alignment, orientation ilm substrate and display panel |
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| CN201811424555.3A CN109239983A (en) | 2018-11-27 | 2018-11-27 | A kind of alignment film method for alignment, orientation ilm substrate and display panel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110989054A (en) * | 2019-12-12 | 2020-04-10 | 华南师范大学 | Liquid crystal film lens and manufacturing method thereof |
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| JP2000105373A (en) * | 1998-09-29 | 2000-04-11 | Matsushita Electric Ind Co Ltd | Production of liquid crystal display element |
| KR20060114580A (en) * | 2005-05-02 | 2006-11-07 | 한국과학기술원 | Liquid crystal alignment layer and manufacturing method thereof |
| CN102199744A (en) * | 2010-03-26 | 2011-09-28 | 国家纳米科学中心 | Preparation method of film with micro-nano wrinkled patterns |
| CN103789741A (en) * | 2014-02-20 | 2014-05-14 | 苏州华维纳纳米科技有限公司 | Method for preparing drape-based metal surface nanostructure |
| CN106990615A (en) * | 2016-01-14 | 2017-07-28 | 豪威科技股份有限公司 | Form the method and display device of the both alignment layers of liquid crystal display device |
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2018
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| JP2000105373A (en) * | 1998-09-29 | 2000-04-11 | Matsushita Electric Ind Co Ltd | Production of liquid crystal display element |
| KR20060114580A (en) * | 2005-05-02 | 2006-11-07 | 한국과학기술원 | Liquid crystal alignment layer and manufacturing method thereof |
| CN102199744A (en) * | 2010-03-26 | 2011-09-28 | 国家纳米科学中心 | Preparation method of film with micro-nano wrinkled patterns |
| CN103789741A (en) * | 2014-02-20 | 2014-05-14 | 苏州华维纳纳米科技有限公司 | Method for preparing drape-based metal surface nanostructure |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110989054A (en) * | 2019-12-12 | 2020-04-10 | 华南师范大学 | Liquid crystal film lens and manufacturing method thereof |
| CN110989054B (en) * | 2019-12-12 | 2023-12-01 | 华南师范大学 | Liquid crystal film lens and manufacturing method thereof |
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