CN104570486A - Manufacturing method of alignment film - Google Patents
Manufacturing method of alignment film Download PDFInfo
- Publication number
- CN104570486A CN104570486A CN201310525218.4A CN201310525218A CN104570486A CN 104570486 A CN104570486 A CN 104570486A CN 201310525218 A CN201310525218 A CN 201310525218A CN 104570486 A CN104570486 A CN 104570486A
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- alignment film
- making
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- viewing area
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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
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
Abstract
The invention discloses a manufacturing method of an alignment film. The method comprises the following steps that an alignment film solution coats the whole surface of a manufactured base plate, a display region of the base plate coated with the alignment film solution is subjected to exposure for forming the alignment film with regular orientation; the alignment film in a non-display region is removed. Through the method, a Halo region only occurs at the edge of the base plate, and the inside of the base plate including the edge of a panel cannot generate the Halo region, so that the film thickness uniformity of the alignment film is ensured, and in addition, the edge distribution of the alignment film meets narrow side frame process requirements.
Description
Technical field
The present invention relates to technical field of liquid crystal display, particularly relate to a kind of method for making of alignment film.
Background technology
Along with the progressively development of lcd technology, the alignment film flat plate margin (Edge Margin) that narrow frame technological requirement is less and less uneven (Halo) region.Existing alignment film coating technique has transfer printing (Roller) technology and ink-jet (Inkjet) technology etc.The edge of the alignment film pattern (Pattern) that prior art makes there will be larger Halo region, and is difficult to realize alignment film flat plate margin 1mm(millimeter) below, this becomes a bottleneck of narrow frame and the technical development of ultra-narrow frame.As shown in Figure 1, the schematic diagram in the Halo region produced when Fig. 1 is glass substrate of the prior art (glass) 10 coating alignment film, namely the dash area in figure represents alignment film 40, and the alignment film of a-quadrant is partially thick, can reach 5000
(dust), the alignment film in B region is partially thin, close to 400
, the alignment film thickness trend in C region is even, and general 1200
, A, B region is described Halo region.
The principle that Halo region produces is: alignment film is coated on glass substrate (glass) with liquid state, in precuring (Precure) and main solidification (Maincure) solvent evaporation process, at alignment film Pattern periphery, due to the effect of alignment film solution surface tension, solute is constantly to the accumulation of most edge, occur that edge alignment film is partially thick, near the phenomenon that Pattern adjacent edges alignment film is partially thin, this part alignment film thickness abnormal area is alignment film Halo region.
Traditional alignment film coating process, although mode is different, but be all on glass substrate (glass), be coated with out one by one independently alignment film Pattern for the region (Panel) of a formation panel for unit, as shown in Figure 2, dash area in Fig. 2 represents alignment film Pattern40,10 represent glass substrate (glass), and 01 represents panel, and 30 represent effective display area.Halo region can be there is at each alignment film Pattern40 edge, the flat plate margin of alignment film is restricted, be difficult to reach below 1mm.
Summary of the invention
In view of this, fundamental purpose of the present invention is the method for making providing a kind of alignment film, there will be Halo region with the edge at least solving the alignment film Pattern that existing alignment film coating process makes, and alignment film marginal distribution cannot adapt to the problem of narrow frame technological requirement.
For achieving the above object, technical scheme of the present invention is achieved in that
A method for making for alignment film, comprising:
Justifying coating alignment film solution on the substrate completing making;
The viewing area of the substrate being coated with described alignment film solution is exposed, to form the alignment film of orientation rule;
Remove the alignment film of non-display area.
Further, described substrate comprises multiple viewing area and the non-display area between multiple viewing area.
Further, the substrate completing making described in is specially:
Thin film transistor (TFT) array and electrode structure is formed in the viewing area of described substrate; Or
Color resin structure is formed in the viewing area of described substrate.
Further, described on the substrate completing making justifying coating alignment film solution be specially:
By mode justifying coating alignment film solution on the substrate completing making of transfer printing; Or
By mode justifying coating alignment film solution on the substrate completing making of inkjet printing.
Further, the viewing area of the described substrate to being coated with described alignment film solution is carried out exposure and is specially:
Carry out UV-irradiation by the viewing area of mask plate to the substrate being coated with described alignment film solution to expose.
Further, the alignment film of described removal non-display area is specially:
The alignment film of non-display area is removed by development.
Further, described alignment film solution is the alignment film solution of photocrosslinking type.
Further, described alignment film solution is cinnamic acid lipoprotein solution.The method for making of a kind of alignment film provided by the invention, adopt the mode of justifying coating alignment film, the method being exposed by UV and develop, Halo region is made only to appear at substrate edges, substrate inside comprises Panel edge and there will not be Halo region, the thickness homogeneity of alignment film is guaranteed, and can realize by the width control system of the flat plate margin of alignment film about 10 μm (UV exposure and development accuracy rating in), make alignment film marginal distribution can adapt to narrow frame technological requirement.
Accompanying drawing explanation
The schematic diagram in the Halo region that Fig. 1 produces when being alignment film coating in prior art;
Fig. 2 is the alignment film Pattern schematic diagram under existing coating process;
Fig. 3 is the process flow diagram of the method for making of a kind of alignment film of the embodiment of the present invention;
Fig. 4 a is the schematic diagram one completing the substrate of making of the embodiment of the present invention;
Fig. 4 b is the schematic diagram two completing the substrate of making of the embodiment of the present invention;
Fig. 5 a is the schematic diagram one of the substrate after the coating alignment film solution of the embodiment of the present invention;
Fig. 5 b is the schematic diagram two of the substrate after the coating alignment film solution of the embodiment of the present invention;
Fig. 6 a is the schematic diagram one of the substrate after the exposure of the embodiment of the present invention;
Fig. 6 b is the schematic diagram two of the substrate after the exposure of the embodiment of the present invention;
Fig. 7 a is the schematic diagram one of the substrate after the development of the embodiment of the present invention;
Fig. 7 b is the schematic diagram two of the substrate after the development of the embodiment of the present invention;
Fig. 8 is that the photocrosslinking type alignment film solution of the embodiment of the present invention is through the postradiation reaction schematic diagram of UV light.
Embodiment
Below in conjunction with the drawings and specific embodiments, the technical solution of the present invention is further elaborated.
The method for making of a kind of alignment film that the embodiment of the present invention provides, as shown in Figure 3, mainly comprises the following steps:
Step 301, justifying coating alignment film solution on the substrate completing making.It should be noted that, substrate described in the embodiment of the present invention can be applicable to the material making array base palte and color membrane substrates for glass substrate, plastic base, quartz base plate etc. are various, for convenience of describing, be described for glass substrate (glass) in subsequent embodiment, but this does not show that embodiments of the invention are just only limitted to glass substrate (glass).
Wherein, the substrate completing making described in is specially:
Thin film transistor (TFT) (TFT, Thin Film Transistor) array and electrode structure is formed in the viewing area of described substrate; Or
Color resin structure is formed in the viewing area of described substrate.
Described thin film transistor (TFT) array and the electrode structure of being formed is making for array base palte, namely on the substrate making array base palte, forms the structure such as thin film transistor (TFT) array and electrode; The described color resin structure that is formed is making for color film (CF, Color Filter) substrate, namely on the substrate making color membrane substrates, forms the structure such as color resin and black matrix; The described substrate completing making can also be that color film is integrated in array base palte, namely on the substrate making array base palte, forms the structure such as thin film transistor (TFT) array and electrode, and by structure assemblies such as the color resin of the color film of making and black matrixes in described array base palte.In a word, the substrate completing making described in the embodiment of the present invention refers to, has completed the substrate of the various necessary operation before making alignment film.
The array base palte having completed making should complete the making of grid, drain electrode, pixel electrode, public electrode wiring and insulating protective layer.In addition, the ADS pattern array substrate having completed making needs two-layer transparent electrode layer, and one deck is pixel electrode, and one deck is public electrode; The IPS pattern array substrate having completed making only needs layer of transparent electrode layer as pixel electrode layer.Same as the prior art, repeat no more herein.
The color membrane substrates having completed making should complete the making of color blocking layer (Color Resin), black matrix layer (BlackMatrix), protective seam (Over Coat layer) and chock insulator matter (Photo Spacer), common electrode layer vertical electric field patterns such as (need) TN, VA; same as the prior art, repeat no more herein.
Complete the Color Filter on Array substrate of making: its array base palte is except comprising pole, drain electrode, pixel electrode, public electrode, insulating protective layer; also comprise color blocking layer (Color Resin), black matrix layer (BlackMatrix), color membrane substrates only comprises protective seam (Over Coat layer) and chock insulator matter (Photo Spacer), common electrode layer (the vertical electric field pattern needs such as TN, VA).
On the substrate completing making, justifying coating alignment film solution, can adopt the mode of transfer printing or the mode of inkjet printing to perform.
The schematic diagram completing a kind of substrate of making in the embodiment of the present invention is as shown in Figs. 4a and 4b, and Fig. 4 a is the sectional view of glass, and 10 in Fig. 4 a represents glass substrate, and 20 represent sealed plastic box district, and 30 represent effective display area; In Fig. 4 b, glass10 comprises multiple Panel01, the effective display area of each Panel01 is 30.It should be noted that, situation substrate comprising single Panel or multiple Panel is all suitable for the method for making of the alignment film of the embodiment of the present invention; When just counterpart substrate comprising multiple Panel, described substrate comprises multiple viewing area (i.e. effective display area) and the non-display area between multiple viewing area.
After being coated with alignment film to the glass justifying completing making, as shown in figure 5a and 5b, Fig. 5 a is the sectional view of glass to the schematic diagram of described glass, and 10 in Fig. 5 a represents glass substrates, and 20 represent sealed plastic box districts, and 30 represent effective display area, and 40 represent alignment films; In Fig. 5 b, glass10 comprises multiple Panel01, the effective display area of each Panel01 is 30, glass10 upper justifying coating alignment film 40.
Step 302, exposes the viewing area of the substrate being coated with described alignment film solution, to form the alignment film of orientation rule.
Concrete, ultraviolet light (ultraviolet light of linear polarization) irradiation can be carried out by the viewing area of mask plate to the substrate being coated with described alignment film solution and expose.The pattern requirement of mask plate can make ultraviolet light (UV light) only be radiated at the correspondence position of the effective display area of glass substrate, other regions by mask plate shielding, to stop the irradiation of UV light.The schematic diagram of the glass after exposure as shown in figure 6 a and 6b, Fig. 6 a is the sectional view of glass, in Fig. 6 a 10 represents glass substrate, 20 represent sealed plastic box district, 30 represent effective display area, and 40 represent alignment film, and 50 represent mask plate, arrow represents the direction of illumination of UV light, 60 alignment films representing the orientation rule that the alignment film being exposed region is formed; In Fig. 6 b, glass10 comprises multiple Panel01, the effective display area of each Panel01 is 30, and the alignment film on effective display area 30 is penetrated the alignment film 60 of rear formation orientation rule by UV illumination, is not then still remained with the alignment film of coating by the region that UV illumination is mapped to.
Step 303, removes the alignment film of non-display area.
Concrete, can be removed the alignment film of non-display area by development, developer solution can adopt potassium hydroxide KOH developer solution etc.After carrying out development stripping to the alignment film of non-exposed areas, as illustrated in figs. 7 a and 7b, Fig. 7 a is the sectional view of glass to the schematic diagram of glass, in Fig. 7 a 10 represents glass substrate, 20 represent sealed plastic box district, and 30 represent effective display area, the alignment film of 60 expression orientation rules; In Fig. 7 b, glass10 comprises multiple Panel01, the effective display area of each Panel01 is 30, and effective display area is the alignment film remaining with orientation rule on 30, and the alignment film of non-exposed areas carries out developing the effect after peeling off as shown in figure 70.
The embodiment of the present invention adopts justifying glass to be coated with the mode of alignment film, the mode exposed by the UV alignment film corresponding to effective display area carries out orientation, the alignment film in other regions (comprising Panel fringe region) does not irradiate UV light, carries out development lift-off processing after UV exposure to alignment film edge; So, Halo region is made only to appear at glass edge, glass inside comprises Panel edge and there will not be Halo region, the thickness homogeneity of alignment film is guaranteed, and the rectilinearity at alignment film edge can be ensured, the flat plate margin width (distance namely between alignment film edge and effective display area) that accurately can control alignment film is less than 1 millimeter (mm), and preferably, described flat plate margin width can reach 10 microns (μm).
It should be noted that, the embodiment of the present invention also can bring following beneficial effect:
1, the flat plate margin width of alignment film can reach <10 μm, and without Halo region, can not have an impact to the alignment film orientation display in effective display area;
2, for the circumferential arrangement such as black matrix (BM), fluid sealant (Sealant) provide greater room, the realization of narrow frame and ultra-narrow frame is conducive to;
3, at alignment film formation stages, can Simplified flowsheet:
According to Roller pattern, then each size can share a transfer printing board (APR version), without the need to frequent replacing;
According to Inkjet pattern, if alignment film thickness is constant, then device parameter can share, and reduces and produces the line tangent line time;
4, the use of the alignment film of orientation rule, reduce membrane thickness unevenness (Mura) because friction mode produces and foreign matter light leak (Zara Particle) etc. bad.
Also it should be noted that, the alignment film solution of the embodiment of the present invention can adopt light to the alignment film liquid of crosslinked (OpticalAlignment) type, as cinnamic acid lipoprotein solution etc. can light orientation and the easy alignment film material peeled off of development, the alignment film liquid of Optical Alignment type is also a kind of photoresistance (PR, PhotoResist) glue simultaneously; The alignment film material required exposure energy of this type is lower, its reaction principle be utilize polymer side chain photosensitive group with unsaturated double-bond carry out light two quantize reaction, as shown in Figure 8, this type of material can also use as PR glue.As shown in Figure 8, cinnamic acid fat is under polarization UV illumination is penetrated, there occurs verge ring addition chain polymerization reaction (this reaction is [2+2] cycloaddition reaction), there is the anisotropic elastic solid of segment in polymer film surface, liquid crystal molecule can be induced to arrange perpendicular to incident light polarization direction; In reaction equation shown in Fig. 8, dotted arrow represents that two double bonds are opened, and makes two molecule addition reactions be the net result of right figure.
The above, be only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.
Claims (8)
1. a method for making for alignment film, is characterized in that, the method comprises:
Justifying coating alignment film solution on the substrate completing making;
The viewing area of the substrate being coated with described alignment film solution is exposed, to form the alignment film of orientation rule;
Remove the alignment film of non-display area.
2. the method for making of alignment film according to claim 1, it is characterized in that, described substrate comprises multiple viewing area and the non-display area between multiple viewing area.
3. the method for making of alignment film according to claim 2, is characterized in that, described in complete making substrate be specially:
Thin film transistor (TFT) array and electrode structure is formed in the viewing area of described substrate; Or
Color resin structure is formed in the viewing area of described substrate.
4. the method for making of alignment film according to claim 3, is characterized in that, described on the substrate completing making justifying coating alignment film solution be specially:
By mode justifying coating alignment film solution on the substrate completing making of transfer printing; Or
By mode justifying coating alignment film solution on the substrate completing making of inkjet printing.
5. the method for making of alignment film according to claim 4, it is characterized in that, the viewing area of the described substrate to being coated with described alignment film solution is carried out exposure and is specially:
Carry out UV-irradiation by the viewing area of mask plate to the substrate being coated with described alignment film solution to expose.
6. the method for making of alignment film according to claim 5, it is characterized in that, the alignment film of described removal non-display area is specially:
The alignment film of non-display area is removed by development.
7. the method for making of alignment film according to claim 6, it is characterized in that, described alignment film solution is the alignment film solution of photocrosslinking type.
8. the method for making of alignment film according to claim 7, it is characterized in that, described alignment film solution is cinnamic acid lipoprotein solution.
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| CN201310525218.4A CN104570486A (en) | 2013-10-30 | 2013-10-30 | Manufacturing method of alignment film |
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| CN201310525218.4A CN104570486A (en) | 2013-10-30 | 2013-10-30 | Manufacturing method of alignment film |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104035237A (en) * | 2014-05-30 | 2014-09-10 | 京东方科技集团股份有限公司 | Light alignment film, manufacturing method thereof and liquid crystal displayer |
| CN104808396A (en) * | 2015-05-13 | 2015-07-29 | 京东方科技集团股份有限公司 | Liquid crystal box, preparation method thereof and display device |
| CN105467686A (en) * | 2016-01-07 | 2016-04-06 | 京东方科技集团股份有限公司 | Display substrate, manufacturing method thereof, liquid crystal box and displayer |
| CN106383421A (en) * | 2016-11-07 | 2017-02-08 | 深圳市华星光电技术有限公司 | Manufacturing method of alignment film, display panel and display device |
| CN106918954A (en) * | 2017-05-10 | 2017-07-04 | 京东方科技集团股份有限公司 | A kind of orientation membrane preparation method, display base plate and display panel |
| CN108873536A (en) * | 2018-06-01 | 2018-11-23 | Oppo广东移动通信有限公司 | Shell and preparation method thereof, electronic equipment |
| CN109752884A (en) * | 2019-03-21 | 2019-05-14 | 京东方科技集团股份有限公司 | A kind of alignment film, preparation method and display device |
| CN113552749A (en) * | 2021-07-26 | 2021-10-26 | 信利(仁寿)高端显示科技有限公司 | High-precision alignment film printing method, mask plate and liquid crystal panel |
| CN114824126A (en) * | 2022-04-02 | 2022-07-29 | 武汉华星光电半导体显示技术有限公司 | Display panel and manufacturing method thereof |
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| CN104035237A (en) * | 2014-05-30 | 2014-09-10 | 京东方科技集团股份有限公司 | Light alignment film, manufacturing method thereof and liquid crystal displayer |
| CN104808396A (en) * | 2015-05-13 | 2015-07-29 | 京东方科技集团股份有限公司 | Liquid crystal box, preparation method thereof and display device |
| CN105467686A (en) * | 2016-01-07 | 2016-04-06 | 京东方科技集团股份有限公司 | Display substrate, manufacturing method thereof, liquid crystal box and displayer |
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| CN109752884A (en) * | 2019-03-21 | 2019-05-14 | 京东方科技集团股份有限公司 | A kind of alignment film, preparation method and display device |
| CN113552749A (en) * | 2021-07-26 | 2021-10-26 | 信利(仁寿)高端显示科技有限公司 | High-precision alignment film printing method, mask plate and liquid crystal panel |
| CN114824126A (en) * | 2022-04-02 | 2022-07-29 | 武汉华星光电半导体显示技术有限公司 | Display panel and manufacturing method thereof |
| CN114824126B (en) * | 2022-04-02 | 2023-04-07 | 武汉华星光电半导体显示技术有限公司 | Display panel and manufacturing method thereof |
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