CN101441367B - Platen for printing alignment film - Google Patents
Platen for printing alignment film Download PDFInfo
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- CN101441367B CN101441367B CN200810189153XA CN200810189153A CN101441367B CN 101441367 B CN101441367 B CN 101441367B CN 200810189153X A CN200810189153X A CN 200810189153XA CN 200810189153 A CN200810189153 A CN 200810189153A CN 101441367 B CN101441367 B CN 101441367B
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Abstract
The invention discloses a platen for printing alignment film. The platen comprises a basement film, adhesion layer and a sensitization resin layer. The grid cells are distributed on the liquid crystal panel region on the sensitization resin surface. The liquid crystal panel region on the sensitization resin layer surface comprises a region which is corresponding to the liquid crystal panel display region and a peripheral region which is corresponding to the liquid crystal panel non-display region, wherein the region corresponding to the liquid crystal panel display region has a first grid cell and the peripheral region corresponding to the liquid crystal panel non-display region has a grid cell different from the first grid cell, thus effectively ensuring the thickness evenness of alignment film printed on the liquid crystal panel.
Description
Technical field
The present invention relates to LCD manufacturing technology field, particularly a kind of platen that is used to print alignment film.
Background technology
LCD (Liquid Crystal Display, LCD) being the optical property of utilizing liquid crystal shows specific image with applying the characteristic that voltage changes, it comprises a liquid crystal panel, and liquid crystal panel is by a pair of glass substrate and inject and described liquid crystal between the glass substrate is constituted.
In LCD,, the liquid crystal molecule in the liquid crystal panel is arranged along certain direction in order to obtain uniform brightness and high contrast.Therefore, apply one deck alignment film described respectively on to glass substrate.Alignment film is by (Polyimide PI) is printed onto on the platen that is pre-formed figure, and then will be printed onto polyimide coating on the platen to glass substrate and form with polyimide.Therefore the alignment film PI film that is otherwise known as.Alignment film is used to regulate the orientation of liquid crystal and move, and makes liquid crystal carry out rapid reaction according to external electrical field.Alignment film has important effect to the whole display quality that LCD is provided.
Fig. 1 is general alignment film printing schematic representation of apparatus.Divider 101 is discharged to PI liquid on the Anilox roller (Anilox Roll) 103, by scraper (Doctor Blade) 102 the PI liquid on the Anilox roller 103 is wipeed off in this process.Then, by the rotation of Anilox roller 103, PI liquid is printed onto on the platen 105 that is pre-formed figure.Platen 105 covers the surface of print roller (PrintRoll) 104.Print roller 104 is rotated with direction as shown, and mother substrate 107 so just is printed onto mother substrate 107 surfaces with the PI liquid on the platen 105 along arrow direction simultaneously, forms alignment film 106.
With reference to shown in Figure 2, in mother substrate 107, comprise multi-disc liquid crystal panel 201, between the liquid crystal panel of adjacent column, there is radioshadow 202, there is space 203 between liquid crystal panel 201 and the radioshadow 202.The sectional view of a kind of platen of corresponding mother substrate 107 as shown in Figure 3, platen 105 comprises the basement membrane 301 that formed by polyester material, adhesive coating 302 and by photosensitive resin (Asahi Photosensitive Resin, APR) photosensitive resin layer (being the APR layer) that forms of material.Wherein the APR layer comprises liquid crystal panel zone 303, radioshadow zone 304, void area 305, and it corresponds respectively to liquid crystal panel 201, radioshadow 202 and space 203 on the mother substrate.Be coated with PI in radioshadow zone 304 and the liquid crystal panel zone 303, and gap area 305 there is not coated PI.
The surface in the liquid crystal panel of APR layer zone 303 and radioshadow zone 304 is the fenestral fabric of convex-concave, and the liquid crystal panel of APR layer zone 303 has identical fenestral fabric with radioshadow zone 304.Fig. 4 A and 4B have disclosed a kind of front elevation and sectional view of liquid crystal panel area part of existing platen respectively.For ease of describing, the periodic unit that has minimum in the fenestral fabric is called grid cell, part is a grid cell 400 shown in dashed rectangle among the rectangular block unit among Fig. 4 A and Fig. 4 B.By Fig. 4 A and 4B as seen, the APR layer in liquid crystal panel zone 303 only comprises one type grid cell 400 on the platen, and grid cell 400 is uniformly distributed in the APR layer in liquid crystal panel zone 303.Grid cell 400 comprises bossing 401 and sunk part 402, and PI liquid is filled in the sunk part 402 between the bossing 401 of adjacent mesh unit 400.Because the distribution density of grid cell 400, the centre distance between the adjacent mesh unit 400, the diameter of the bossing 401 of grid cell 400 is all identical with the degree of depth of the groove part 402 of grid cell 400.Therefore, be printed onto in the liquid crystal panel zone 303 of platen 105 amount of the PI on each grid cell with identical.Because existence is not coated with the void area of PI between the liquid crystal panel of platen 105 zone 303 and radioshadow zone 304; so; when being transferred to the PI on the platen 105 on the mother substrate 107; appear at the thin problem of alignment film that the fringe region of liquid crystal panel is printed through regular meeting, thereby cause the unevenness of the alignment film printing thickness of whole liquid crystal panel.
In addition, the factor that influences alignment film printing thickness also has the following aspects: the grid cell distribution of squeegee pressure (Printing Pressure), print speed printing speed, platen etc.In processing procedure, also can there be certain difference in squeegee pressure (being the pressure between platen 105 and the mother substrate 107) in the center and peripheral zone of liquid crystal panel, therefore, when being transferred to the PI on the platen 105 on the mother substrate 107, the neighboring area that also can occur being printed onto liquid crystal panel sometimes is compared to the thin defective of the alignment film of central area, thereby causes the problem of the alignment film printing uneven thickness of whole liquid crystal panel.
Summary of the invention
In view of this, the objective of the invention is to, propose a kind of platen that is used to print alignment film, adopt this platen can print out the alignment film of uniform thickness.
The platen that the embodiment of the invention proposes is by basement membrane, adhesive coating and photosensitive resin layer constitute, the liquid crystal panel areal distribution grid cell of photosensitive resin laminar surface, the liquid crystal panel zone of described photosensitive resin laminar surface comprises the zone of corresponding liquid crystal panel viewing area and the neighboring area of corresponding liquid crystal panel non-display area, the zone of wherein corresponding liquid crystal panel viewing area has first grid cell, the neighboring area of corresponding liquid crystal panel non-display area has the grid cell different with first grid cell, the grid cell of the neighboring area of corresponding liquid crystal panel non-display area from inside to outside comprises second grid cell to the n grid cell successively among the present invention, wherein n is the natural number more than or equal to 3, and second grid cell to the n grid cell is the gradual change type distribution.By a plurality of grid cell designs that from inside to outside gradually change are set in the neighboring area, can avoid tangible offset between the adjacent mesh unit, make and to seamlessly transit between the adjacent mesh unit and do not have obvious boundary, thereby can further eliminate because the excessive alignment film that causes of difference inhomogeneous between the adjacent mesh unit, further guarantee the homogeneity of the alignment film that is printed.
Description of drawings
Fig. 1 is general alignment film printing schematic representation of apparatus;
Fig. 2 is existing a kind of mother substrate front elevation;
Fig. 3 is the sectional view of a kind of platen of mother substrate correspondence shown in Figure 2;
Fig. 4 A is the front elevation of the liquid crystal panel area grid of existing platen;
Fig. 4 B is the sectional view of the liquid crystal panel area grid I-I along the line shown in Fig. 4 A;
Fig. 5 is the grid cell distribution front elevational schematic in the platen liquid crystal panel zone of the embodiment of the invention one;
Fig. 6 is the cut-away section synoptic diagram that the grid cell in platen liquid crystal panel zone shown in Figure 5 distributes;
Fig. 7 is the grid cell distribution front elevational schematic in the platen liquid crystal panel zone of the embodiment of the invention two;
Fig. 8 is part enlarged diagram and the diagrammatic cross-section thereof that the grid cell in platen liquid crystal panel zone shown in Figure 7 distributes, and has wherein disclosed the diameter of centre distance, the degree of depth and the bossing thereof of different grid cells.
Embodiment
The problem of the alignment film uneven thickness that is printed for the central area that solves the liquid crystal panel that causes owing to multiple reason and fringe region, the embodiment of the invention is to distribute by the grid cell that changes one of them factor one platen that influences alignment film printing thickness, make that the central area of corresponding liquid crystal panel has different grid cells with fringe region on the platen, and then can obtain different PI amounts, thereby reach the uniform purpose of alignment film thickness that makes whole liquid crystal panel applied.
The embodiment of the invention be thin with the alignment film of the fringe region that is printed to liquid crystal panel with respect to the central area of liquid crystal panel be that example describes, certainly, the embodiment of the invention is not limited thereto, the technical scheme that the embodiment of the invention adopted is equally applicable to be printed to the alignment film situation thicker with respect to the central area of liquid crystal panel of the fringe region of liquid crystal panel, and the grid cell that only need change the central area of corresponding liquid crystal panel on the platen of the embodiment of the invention and fringe region a little distributes and gets final product.In order to save length, the situation thicker with respect to the central area of liquid crystal panel for the alignment film of the fringe region that is printed to liquid crystal panel repeats no more.
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is further elaborated below in conjunction with accompanying drawing.
Figure 5 shows that the grid cell distribution front elevational schematic in the liquid crystal panel zone on the platen of the embodiment of the invention one.Liquid crystal panel zone on the platen comprises the part of the non-display area of corresponding liquid crystal panel on the part of the viewing area of corresponding liquid crystal panel on the platen and the platen.For ease of describing, below the part of the viewing area of corresponding liquid crystal panel on the platen is called the AA district of platen, the zone of the non-display area of corresponding liquid crystal panel is called the neighboring area of platen on platen, and the AA district that the neighboring area of platen is distributed in platen adjoins on every side and with the AA district.AA district at platen adopts different grid cell designs respectively with the neighboring area, and promptly the grid cell in the AA district on platen is called the first grid cell U1, and the grid cell of the neighboring area on platen is called the second grid cell U2.Fig. 6 shows the first grid cell U1 in liquid crystal panel zone of platen and the diagrammatic cross-section of the second grid cell U2.The first grid cell U1 and the second grid cell U2 satisfy following requirement:
(1) in a grid cell, the ratio that the area of bossing accounts for the total area of this grid cell is called aperture opening ratio (Open Ratio).The aperture opening ratio of the first grid cell U1 is greater than the aperture opening ratio of the second grid cell U2.Realize that this requirement can be by following arbitrary mode:
A, the second grid cell U2 are with respect to the first grid cell U1, and the centre distance between its adjacent mesh unit is constant, but the diameter of bossing reduces.Centre distance between the adjacent mesh unit has reflected the Density Distribution situation of grid cell, centre distance between the adjacent mesh unit and the density of the grid cell relation of being inversely proportional to, and the centre distance between the grid cell is big more, and then the density of grid cell is more little; Centre distance between the grid cell is more little, and then the density of grid cell is big more.Centre distance between the adjacent mesh unit is constant, and then the density of grid cell is constant.
B, the second grid cell U2 are with respect to the first grid cell U1, and the diameter of its bossing is constant, and the centre distance between the adjacent mesh unit increases, and promptly the density of grid cell reduces.
C, the second grid cell U2 are with respect to the first grid cell U1, centre distance between the adjacent mesh unit is that the density of grid cell and the diameter of bossing all change, but needs to guarantee the aperture opening ratio of the aperture opening ratio of the second grid cell U2 less than the first grid cell U1.
Because the aperture opening ratio of the second grid cell U2 is less relatively, the amount of PI liquid that then is filled in the sunk part of the second grid cell U2 also increases relatively.Because the increasing of PI liquid measure, thereby the PI liquid that makes the neighboring area of platen be transferred on the mother substrate is tending towards identical with the PI liquid that the AA district of platen is transferred to mother substrate.
(2) in a grid cell, the difference in height of its bossing and sunk part is called the degree of depth of grid cell.The degree of depth of the second grid cell U2 is greater than the degree of depth of the first grid cell U1.
Under the constant situation of other condition of grid cell, the degree of depth of grid cell is dark more, the amount of PI liquid of sunk part that then is filled in grid cell is many more, so the second grid cell U2 holds more relatively PI liquid than the sunk part of the first grid cell U1,, the second grid cell U2 by platen increases relatively so being transferred to the thickness of alignment film of the neighboring area of liquid crystal panel.Therefore, by adopt the bigger grid cell design of the degree of depth in the neighboring area, can reach the inhomogeneity purpose of print thickness of alignment film equally.
Above-mentioned requirements (1), (2) can only be satisfied one of them or two and be satisfied simultaneously.
When density, aperture opening ratio and the degree of depth thereof of grid cell change simultaneously, below provide a kind of grid cell value of preferred embodiment: the span of the aperture opening ratio of the described first grid cell U1 is that the span of the aperture opening ratio of 45% to 55%, the second grid cell U2 is 30% to 45%; The density of the described second grid cell U2 is that per inch 200 is counted, and the density of the described first grid cell U1 is that per inch 400 is counted; The degree of depth span of the described second grid cell U2 is 25um ± 2um, and the degree of depth span of the described first grid cell U1 is 15um ± 2um.
Embodiment one is provided with two kinds of grid cells designs by employing and solves alignment film problem in uneven thickness on platen, but certain weak point is arranged:, may be not enough to solve the problem of alignment film uneven thickness if these two kinds of grid cell poor designs opposite sex are too little; If but these two kinds of grid cells design differences are too big, then can there be tangible break difference structure in switching place at grid cell, thereby, can bring the unevenness of alignment film thickness to a certain degree inevitably again in switching place of grid cell.Given this, the embodiment of the invention has proposed the improvement type grid cell distribution design in the liquid crystal panel zone on a kind of platen again.
Figure 7 shows that the grid cell distribution schematic diagram in the liquid crystal panel zone on the platen of the embodiment of the invention two.As can be seen from Figure 7, the grid cell in AA district still adopts the first grid cell U1 on the platen, but not a kind of grid cell that adopts the embodiment one from the AA district to the grid cell of neighboring area transition on the platen, but adopt the grid cell design of gradual change type, i.e. distributed the successively from inside to outside second grid cell U2, the 3rd grid cell U3......, n grid cell Un of neighboring area.Wherein n is the natural number more than or equal to 3.
Cooperate and to consult shown in Figure 8ly, Fig. 8 be a kind of diagrammatic cross-section in the liquid crystal panel zone on the platen of the embodiment of the invention two and the grid cell distribution schematic diagram of correspondence.Wherein P1, Pn/2......Pn represent first respectively, the centre distance of n/2, n grid cell, D1, Dn/2......Dn then represent first respectively, the diameter of the bossing of n/2, n grid cell, and H1, Hn/2, Hn then represent first respectively, the degree of depth of n/2, n grid cell.In order to illustrate the clear of expression, only show first grid cell, n/2 grid cell, three kinds of situations of n grid cell among Fig. 8, the diameter synoptic diagram of the diagrammatic cross-section of other pattern and centre distance and bossing is represented with suspension points.
For i grid cell Ui wherein, 2≤i≤n wherein, i grid cell Ui and (i-1) grid cell U (i-1) satisfy following requirement:
The aperture opening ratio of (1) i grid cell Ui is less than the aperture opening ratio of (i-1) grid cell U (i-1).
Realize that this requirement can be by following arbitrary mode:
A, i grid cell Ui are with respect to (i-1) grid cell U (i-1), and the centre distance between the adjacent mesh unit is constant, and promptly the density of grid cell is constant, but the diameter of bossing reduces.
B, i grid cell Ui are with respect to (i-1) grid cell U (i-1), and the diameter of its bossing is identical, and the centre distance between the adjacent mesh unit increases, and promptly the density of grid cell reduces.
C, i grid cell Ui are with respect to (i-1) grid cell U (i-1), centre distance between the adjacent mesh unit is that the density of grid cell and the diameter of bossing all change, but guarantees the aperture opening ratio of the aperture opening ratio of i grid cell Ui less than (i-1) grid cell U (i-1).
By a plurality of grid cell designs that from inside to outside gradually change are set in the neighboring area, can avoid tangible offset between the adjacent mesh unit, make and to seamlessly transit between the adjacent mesh unit and do not have obvious boundary, thereby can eliminate because the excessive alignment film that causes of difference inhomogeneous between the adjacent mesh unit, so further guaranteed the homogeneity of the alignment film that is printed.
When density, aperture opening ratio and the degree of depth thereof of grid cell change simultaneously, if n is taken as 3, below provide a kind of grid cell span of preferred embodiment: the span of the aperture opening ratio of the described first grid cell U1 is 45% to 55%, the span of the aperture opening ratio of the second grid cell U2 is that the span of the aperture opening ratio of 40% to 50%, the three grid cell U3 is 30% to 45%; The density of described the 3rd grid cell U3 is that per inch 200 is counted, and the density of the described second grid cell U2 is that per inch 300 is counted, and the density of the described first grid cell U1 is that per inch 400 is counted; The degree of depth span of the described first grid cell U1 is 15um ± 2um, and the degree of depth span of the described second grid cell U2 is 20um ± 2um, and the degree of depth span of described the 3rd grid cell U3 is 25um ± 2um.
If n is greater than 3, the span of the aperture opening ratio of the then described first grid cell U1 is that the span of the aperture opening ratio of 45% to 55%, the n grid cell Un is 30% to 45%; The density of described n grid cell Un is that per inch 200 is counted, and the density of the described first grid cell U1 is that per inch 400 is counted; The degree of depth span of described n grid cell Un is 25um ± 2um, and the degree of depth span of the described first grid cell U1 is 15um ± 2um.For second grid cell U2 to the (n-1) the grid cell U (n-1), the value of the degree of depth of the aperture opening ratio of grid cell, the density of grid cell, grid cell and is gradual change type and distributes then between the value of first grid cell U1 to the n grid cell Un.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. platen that is used to print alignment film, described platen is by basement membrane, adhesive coating and photosensitive resin layer constitute, the liquid crystal panel areal distribution grid cell of photosensitive resin laminar surface wherein, the liquid crystal panel zone of described photosensitive resin laminar surface comprises the zone of corresponding liquid crystal panel viewing area and the neighboring area of corresponding liquid crystal panel non-display area, it is characterized in that, the zone of described corresponding liquid crystal panel viewing area has first grid cell, the neighboring area of described corresponding liquid crystal panel non-display area has the grid cell different with first grid cell, the grid cell of the neighboring area of described corresponding liquid crystal panel non-display area from inside to outside comprises second grid cell to the n grid cell successively, wherein n is the natural number more than or equal to 3, and second grid cell to the n grid cell is the gradual change type distribution.
2. platen according to claim 1 is characterized in that, the aperture opening ratio of i grid cell is less than the aperture opening ratio of (i-1) grid cell, wherein 2≤i≤n.
3. platen according to claim 1 and 2 is characterized in that, the degree of depth of i grid cell is greater than the degree of depth of (i-1) grid cell, wherein 2≤i≤n.
4. platen according to claim 2 is characterized in that, the i grid cell is with respect to (i-1) grid cell,
Centre distance between the adjacent mesh unit equates, but the diameter of bossing reduces; Perhaps
The diameter of the bossing of grid cell is identical, and the centre distance between the adjacent mesh unit increases; Perhaps
Centre distance between the adjacent mesh unit is all different with the diameter of the bossing of grid cell.
5. platen according to claim 2 is characterized in that, the span of the aperture opening ratio of described first grid cell is that the span of the aperture opening ratio of 45% to 55%, the n grid cell is 30% to 45%.
6. platen according to claim 5 is characterized in that, the density of described first grid cell is that per inch 400 is counted, and the density of described n grid cell is that per inch 200 is counted.
7. platen according to claim 6 is characterized in that, when n=3, the span of the aperture opening ratio of second grid cell is that the density of 40% to 50%, the second grid cell is that per inch 300 is counted.
8. platen according to claim 3 is characterized in that, the degree of depth span of described first grid cell is 15um ± 2um, and the degree of depth span of described n grid cell is 25um ± 2um.
9. platen according to claim 8 is characterized in that, when n=3, the degree of depth span of second grid cell is 20um ± 2um.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810189153XA CN101441367B (en) | 2008-12-29 | 2008-12-29 | Platen for printing alignment film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810189153XA CN101441367B (en) | 2008-12-29 | 2008-12-29 | Platen for printing alignment film |
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| Publication Number | Publication Date |
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| CN101441367A CN101441367A (en) | 2009-05-27 |
| CN101441367B true CN101441367B (en) | 2011-05-11 |
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| CN200810189153XA Active CN101441367B (en) | 2008-12-29 | 2008-12-29 | Platen for printing alignment film |
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Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102314024A (en) * | 2011-09-08 | 2012-01-11 | 深圳市华星光电技术有限公司 | Method for preparing distribution film and equipment |
| CN102375268A (en) * | 2011-11-18 | 2012-03-14 | 南京中电熊猫液晶显示科技有限公司 | Asahikasei photosensitive resin plate and method for forming asahikasei photosensitive resin film layer by using asahikasei photosensitive resin plate |
| CN102393543A (en) * | 2011-11-18 | 2012-03-28 | 明基材料有限公司 | Color filter and manufacturing method thereof |
| CN102700268B (en) * | 2012-05-28 | 2016-01-27 | 苏州汇诚智造工业设计有限公司 | Building in the style of the ancients print template and preparation method thereof |
| CN104317110B (en) * | 2014-11-21 | 2017-06-30 | 合肥京东方光电科技有限公司 | A kind of transfer printing board |
| US10254454B2 (en) | 2015-06-15 | 2019-04-09 | Magic Leap, Inc. | Display system with optical elements for in-coupling multiplexed light streams |
| CN105137662B (en) * | 2015-10-15 | 2018-01-02 | 京东方科技集团股份有限公司 | Substrate and preparation method thereof, display device |
| JP6278942B2 (en) * | 2015-10-21 | 2018-02-14 | 日本航空電子工業株式会社 | Method for forming an insulating film by flexographic printing |
| CN105204235A (en) * | 2015-11-09 | 2015-12-30 | 京东方科技集团股份有限公司 | Transfer printing plate as well as manufacturing method and transfer printing method thereof |
| CN105652525A (en) * | 2016-04-14 | 2016-06-08 | 京东方科技集团股份有限公司 | Transfer panel, coating device and coating method thereof |
| WO2018112101A1 (en) | 2016-12-14 | 2018-06-21 | Magic Leap, Inc. | Patterning of liquid crystals using soft-imprint replication of surface alignment patterns |
| CN106707625A (en) * | 2017-01-23 | 2017-05-24 | 武汉华星光电技术有限公司 | Alignment film printing plate and manufacturing method thereof |
| CN108061992B (en) * | 2018-01-26 | 2023-10-13 | 京东方科技集团股份有限公司 | Impression plate and manufacturing method thereof, and oriented film transfer printing plate and manufacturing method thereof |
| CN110007524A (en) * | 2019-04-02 | 2019-07-12 | 深圳市华星光电技术有限公司 | The production method of orientation version and alignment film |
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Address after: 215301 No. 1, Longteng Road, Kunshan, Jiangsu Patentee after: Kunshan Longteng Au Optronics Co Address before: 215301 No. 1, Longteng Road, Kunshan, Jiangsu Patentee before: Kunshan Longteng Optronics Co., Ltd. |