JP3058385B2 - Alignment film solution transfer plate - Google Patents
Alignment film solution transfer plateInfo
- Publication number
- JP3058385B2 JP3058385B2 JP10073093A JP10073093A JP3058385B2 JP 3058385 B2 JP3058385 B2 JP 3058385B2 JP 10073093 A JP10073093 A JP 10073093A JP 10073093 A JP10073093 A JP 10073093A JP 3058385 B2 JP3058385 B2 JP 3058385B2
- Authority
- JP
- Japan
- Prior art keywords
- alignment film
- transfer plate
- film solution
- solution transfer
- thickness
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Liquid Crystal (AREA)
Description
【0001】[0001]
【産業上の利用分野】本発明は液晶パネルの製造に用い
る配向膜溶液の転写版に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer plate of an alignment film solution used for manufacturing a liquid crystal panel.
【0002】[0002]
【従来の技術】液晶パネルは、ワードプロセッサ、液晶
テレビ等に応用されており、種々の表示装置として大き
な期待を集めている。2. Description of the Related Art Liquid crystal panels have been applied to word processors, liquid crystal televisions and the like, and have attracted great expectations as various display devices.
【0003】また、表示品位向上の流れの中で高密度
化、大画面化の方向に進んでいる。[0003] Further, in the flow of improving display quality, the density and the screen size have been increasing.
【0004】この液晶パネルは2枚のガラス基板の間に
液晶をサンドイッチした構造がとられている。その際、
2枚のガラス基板に挟んだ液晶分子の配向方位を一定の
方向に揃える必要がある。そのために基板上に配向膜を
形成する。配向膜には、一般的に高分子物質の薄膜が用
いられる。配向膜を形成する方法としては、スピンコー
ト法、ロールコート法、印刷法等があるが、工業的には
低コストであるという理由で、印刷法が一般的に用いら
れている。この印刷法はフレキソ(樹脂凸版)印刷を応
用した方法であり、転写版の凹部に配向膜溶液を充填
し、これを基板に転写する。その後、加熱により溶媒を
蒸発させ、膜を形成する。この印刷の際に用いられる転
写版は、格子点上に円形の凸部を有するものが用いられ
ていた。This liquid crystal panel has a structure in which a liquid crystal is sandwiched between two glass substrates. that time,
It is necessary to align the orientation of liquid crystal molecules between two glass substrates in a certain direction. For that purpose, an alignment film is formed on a substrate. Generally, a thin film of a polymer substance is used for the alignment film. As a method of forming the alignment film, there are a spin coating method, a roll coating method, a printing method, and the like. However, the printing method is generally used because it is industrially low cost. This printing method is a method applying flexo (resin letterpress) printing, in which a concave portion of a transfer plate is filled with an alignment film solution and transferred to a substrate. After that, the solvent is evaporated by heating to form a film. As a transfer plate used for this printing, a transfer plate having a circular convex portion on a lattice point was used.
【0005】[0005]
【発明が解決しようとする課題】ところで、液晶パネル
の大画面化に伴い、液晶のパネル面内での均一配向が、
従来にも増して難しくなる。そこで、配向膜厚の均一性
や配向処理の均一性が、従来以上に要求される。ところ
が、従来より用いている転写版では大面積で均一な膜厚
の配向膜を得ることが困難となってきた。特に、大面積
で、しかも画素密度が高い液晶パネルでは、配線等の凹
凸により、パネル面内での広い範囲での膜厚の不均一に
加えて、画素内部や画素間での微少な範囲での膜厚の不
均一も加わるため、均一な配向膜厚を得ることは非常に
難しくなってきている。By the way, with the increase in the screen size of the liquid crystal panel, the uniform orientation of the liquid crystal within the panel surface has been increased.
It becomes more difficult than before. Therefore, the uniformity of the alignment film thickness and the uniformity of the alignment treatment are required more than ever. However, it has become difficult to obtain an alignment film having a large area and a uniform thickness in a transfer plate conventionally used. In particular, in a liquid crystal panel having a large area and a high pixel density, in addition to the unevenness of the film thickness over a wide area within the panel surface due to the unevenness of the wiring and the like, the liquid crystal panel has a small area within the pixel or between the pixels. In addition, it is very difficult to obtain a uniform alignment film thickness due to the non-uniform film thickness.
【0006】これを改善する方法として、スピンコート
法により配向膜溶液を塗布する方法が考えられるが、こ
の方法では不要な部分にも配向膜溶液が塗布されるとい
う問題がある。また、印刷法と比較して生産性が低下す
るという問題もある。As a method of improving this, a method of applying an alignment film solution by a spin coating method can be considered, but this method has a problem that the alignment film solution is applied to unnecessary portions. Further, there is a problem that productivity is reduced as compared with the printing method.
【0007】本発明は、このような従来の配向膜の形成
方法の課題を考慮し、均一な膜厚の配向膜を形成し、高
品位の液晶パネルを実現できる配向膜溶液転写版を提供
することを目的とする。The present invention provides an alignment film solution transfer plate capable of realizing a high quality liquid crystal panel by forming an alignment film having a uniform thickness in consideration of the problems of such a conventional method of forming an alignment film. The purpose is to:
【0008】[0008]
【課題を解決するための手段】本発明は、配向膜溶液を
基板上に任意の形状で転写する際に利用される配向膜溶
液転写版に、格子交差点上にY字形凸部が形成されてい
る配向膜溶液転写版である。According to the present invention, there is provided an alignment film solution transfer plate used for transferring an alignment film solution in an arbitrary shape onto a substrate, wherein a Y-shaped convex portion is formed on a grid intersection. Alignment film solution transfer plate.
【0009】また、本発明は、配向膜溶液転写版を構成
する材料が、樹脂を主成分とするものである。In the present invention, the material constituting the transfer film for the alignment film solution is mainly composed of a resin.
【0010】[0010]
【作用】配向膜溶液転写版の凸部を格子点上に配置し、
その形状をY字形としたことで、基板に転写された液膜
の膜厚むらを小さくすることができる。[Action] The convex portions of the alignment film solution transfer plate are arranged on lattice points,
By making the shape Y-shaped, the thickness unevenness of the liquid film transferred to the substrate can be reduced.
【0011】また、転写直後に存在する膜厚むらは乾燥
時にある程度平均化(レベリング)されるが、本発明の
転写版によって転写された配向膜溶液の膜厚むら(膜厚
の薄い部分)の面積が小さいため、すなわち、本発明の
転写版は膜厚むらの面内での周期が短いため、レベリン
グが効率よく行われる。これらの相乗効果により、乾燥
後に得られる配向膜の均一性が向上する。The thickness unevenness existing immediately after the transfer is leveled to some extent during drying. Since the area is small, that is, the transfer plate of the present invention has a short period in the plane of uneven film thickness, so that leveling is efficiently performed. Due to these synergistic effects, the uniformity of the alignment film obtained after drying is improved.
【0012】[0012]
【実施例】以下、本発明の実施例について図面を参照し
て説明する。Embodiments of the present invention will be described below with reference to the drawings.
【0013】図1は本発明の一実施例の配向膜溶液転写
版の正面図である。11は配向膜溶液転写版、12はそ
の凸部である。FIG. 1 is a front view of an alignment film solution transfer plate according to one embodiment of the present invention. Numeral 11 denotes an alignment film solution transfer plate, and numeral 12 denotes a convex portion thereof.
【0014】図2は本実施例の配向膜溶液転写版を用い
た配向膜印刷装置を示す概略図である。21はディスペ
ンサー、22はアニロックスロール、23はドクターロ
ール、24は版胴、11は本実施例の配向膜溶液転写
版、25はステージ、26は基板である。FIG. 2 is a schematic view showing an alignment film printing apparatus using the alignment film solution transfer plate of the present embodiment. 21 is a dispenser, 22 is an anilox roll, 23 is a doctor roll, 24 is a plate cylinder, 11 is an alignment film solution transfer plate of this embodiment, 25 is a stage, and 26 is a substrate.
【0015】また、図3は本実施例によって得られた配
向膜の膜厚の測定結果を示す図である。ここで、その格
子の一辺の長さは、55μm、凸部の高さは、5μmで
あり、Y字の一辺の長さは、25μmであり、転写版は
感光性樹脂(APR(旭化成)製のもの)を用いた。FIG. 3 is a graph showing the measurement results of the thickness of the alignment film obtained according to this embodiment. Here, the length of one side of the lattice is 55 μm, the height of the convex portion is 5 μm, the length of one side of the Y-shape is 25 μm, and the transfer plate is made of a photosensitive resin (APR (Asahi Kasei)). Was used.
【0016】配向膜溶液転写版11として、図1に示す
ように、格子点上に凸部12が配され、その凸部12が
Y字形をしている、樹脂からなる配向膜溶液転写版を用
いて配向膜の印刷を行った。As shown in FIG. 1, an alignment film solution transfer plate 11 made of a resin, in which protrusions 12 are arranged on lattice points, and the protrusions 12 are Y-shaped, as shown in FIG. Was used to print an alignment film.
【0017】配向膜の印刷は、ディスペンサー21の中
に配向膜溶液を入れ、回転するアニロックスロール22
に滴下し、アニロックスロール22と等速度で回転する
ドクターロール23でアニロックスロール22上の配向
膜溶液の液膜を均一に伸ばした。さらにこれを配向膜溶
液転写版11で、ステージ25の上にセットした基板2
6に転写した。加熱乾燥後、配向膜の膜厚を測定した結
果が図3である。To print an alignment film, an alignment film solution is put into a dispenser 21 and a rotating anilox roll 22 is rotated.
The liquid film of the alignment film solution on the anilox roll 22 was uniformly spread by a doctor roll 23 rotating at the same speed as the anilox roll 22. Further, the substrate 2 was set on the stage 25 with the alignment film solution transfer plate 11.
No. 6 was transferred. FIG. 3 shows the result of measuring the thickness of the alignment film after the heating and drying.
【0018】このように、配向膜溶液転写版として、格
子点上に凸部12を有し、それをY字形凸部12とする
ことで、均一な膜厚の配向膜が得られた。As described above, as the alignment film solution transfer plate, the projections 12 were formed on the lattice points, and the Y-shaped projections 12 were used, whereby an alignment film having a uniform film thickness was obtained.
【0019】(比較例)図4は比較例のため用いた配向
膜溶液転写版の正面図である。41は配向膜溶液転写
版、42はその凸部である。Comparative Example FIG. 4 is a front view of an alignment film solution transfer plate used for a comparative example. Reference numeral 41 denotes an alignment film solution transfer plate, and reference numeral 42 denotes a convex portion thereof.
【0020】配向膜溶液転写版41として、図4に示す
ように、円形の凸部42が格子点上に配された樹脂から
なる配向膜溶液転写版41を用いて配向膜の印刷を行っ
た。As shown in FIG. 4, the alignment film was transferred using an alignment film solution transfer plate 41 made of a resin in which circular convex portions 42 were arranged on lattice points, as shown in FIG. .
【0021】配向膜印刷装置による配向膜の印刷は、配
向膜溶液転写版11を図4に示す配向膜溶液転写版41
に変更した以外は、実施例1と同様の方法で行った。加
熱乾燥後、配向膜の膜厚を測定した結果を図5に示す。The printing of the alignment film by the alignment film printing apparatus is performed by aligning the alignment film solution transfer plate 11 with the alignment film solution transfer plate 41 shown in FIG.
The procedure was performed in the same manner as in Example 1, except for changing to. After heating and drying, the results of measuring the thickness of the alignment film are shown in FIG.
【0022】図5から明らかなように、配向膜溶液転写
版として、格子点上に円形の凸部42を有するものを用
いたところ、配向膜の膜厚にばらつきが見られた。As is apparent from FIG. 5, when the alignment film solution transfer plate having the circular convex portions 42 on the lattice points was used, the thickness of the alignment film varied.
【0023】本実施例と比較例の比較から分かるよう
に、本発明の方が配向膜のばらつきが少なく、均一な配
向膜が得られることが分かる。As can be seen from the comparison between the present embodiment and the comparative example, it can be seen that the present invention has less variation of the alignment film and can obtain a uniform alignment film.
【0024】なお、本発明の格子状形状は、図1のよう
なひし形のものにかぎらず、正方形、平行四辺形等他の
形状でもかまわない。The lattice shape of the present invention is not limited to a diamond shape as shown in FIG. 1, but may be other shapes such as a square, a parallelogram or the like.
【0025】また、本発明のY字形凸部は、そのY字
が、図1のように、3辺の長さが等しいものに限らず、
一方が他の辺より長いもの、あるいは、3辺同士のなす
角度がそれぞれ等しいものでなくてもかまわない。Further, the Y-shaped convex portion of the present invention is not limited to the case where the Y-character has three sides equal in length as shown in FIG.
It is not necessary that one of the sides is longer than the other sides or that the angles formed by the three sides are not equal.
【0026】[0026]
【発明の効果】以上述べたところから明らかなように、
本発明は、配向膜溶液転写版の凸部を格子点上に配置
し、その形状をY字凸部とすることで、基板に転写され
た液膜の膜厚むらを小さくすることができ、この様にし
て得られた均一な膜厚の配向膜を用いることで、表示品
位の高い液晶表示素子を得ることが可能となる。As is apparent from the above description,
In the present invention, the convex portions of the alignment film solution transfer plate are arranged on lattice points, and the shape thereof is a Y-shaped convex portion, so that the thickness unevenness of the liquid film transferred to the substrate can be reduced, By using the alignment film having a uniform thickness obtained in this manner, a liquid crystal display element with high display quality can be obtained.
【図1】本発明の配向膜溶液転写版の一実施例の概略を
示す正面図である。FIG. 1 is a front view schematically showing an embodiment of an alignment film solution transfer plate of the present invention.
【図2】本発明の上記実施例および比較例で用いた配向
膜印刷装置を示す概略図である。FIG. 2 is a schematic view showing an alignment film printing apparatus used in the above-mentioned Examples and Comparative Examples of the present invention.
【図3】本発明の上記実施例によって得られた配向膜の
膜厚の測定結果を示すグラフである。FIG. 3 is a graph showing a measurement result of a film thickness of an alignment film obtained according to the example of the present invention.
【図4】比較例で用いた配向膜溶液転写版の概略を示す
正面図である。FIG. 4 is a front view schematically showing an alignment film solution transfer plate used in a comparative example.
【図5】比較例によって得られた配向膜の膜厚の測定結
果を示すグラフである。FIG. 5 is a graph showing a measurement result of a film thickness of an alignment film obtained in a comparative example.
11 配向膜溶液転写版 12 凸部 21 ディスペンサー 22 アニロックスロール 23 ドクターロール 24 版胴 25 ステージ 26 基板 41 配向膜溶液転写版 42 凸部 DESCRIPTION OF SYMBOLS 11 Alignment film solution transfer plate 12 Convex part 21 Dispenser 22 Anilox roll 23 Doctor roll 24 Plate cylinder 25 Stage 26 Substrate 41 Alignment film solution transfer plate 42 Convex part
フロントページの続き (58)調査した分野(Int.Cl.7,DB名) B41F 17/14 G02F 1/1337 Continuation of the front page (58) Field surveyed (Int.Cl. 7 , DB name) B41F 17/14 G02F 1/1337
Claims (2)
る際に利用される配向膜溶液転写版に、格子交差点上に
Y字形の凸部が形成されていることを特徴とする配向膜
溶液転写版。An alignment film transfer plate used for transferring an alignment film solution onto a substrate in an arbitrary shape, wherein a Y-shaped projection is formed on a grid intersection. Membrane solution transfer plate.
を主成分とすることを特徴とする請求項1記載の配向膜
溶液転写版。2. The alignment film solution transfer plate according to claim 1, wherein the material constituting the alignment film solution transfer plate contains a resin as a main component.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10073093A JP3058385B2 (en) | 1993-04-27 | 1993-04-27 | Alignment film solution transfer plate |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10073093A JP3058385B2 (en) | 1993-04-27 | 1993-04-27 | Alignment film solution transfer plate |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH06305119A JPH06305119A (en) | 1994-11-01 |
JP3058385B2 true JP3058385B2 (en) | 2000-07-04 |
Family
ID=14281726
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10073093A Expired - Fee Related JP3058385B2 (en) | 1993-04-27 | 1993-04-27 | Alignment film solution transfer plate |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3058385B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI259923B (en) | 2002-08-01 | 2006-08-11 | Boe Hyids Technology Co Ltd | Liquid crystal display |
-
1993
- 1993-04-27 JP JP10073093A patent/JP3058385B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH06305119A (en) | 1994-11-01 |
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