JPH04322203A - Manufacture of color filter - Google Patents
Manufacture of color filterInfo
- Publication number
- JPH04322203A JPH04322203A JP3090406A JP9040691A JPH04322203A JP H04322203 A JPH04322203 A JP H04322203A JP 3090406 A JP3090406 A JP 3090406A JP 9040691 A JP9040691 A JP 9040691A JP H04322203 A JPH04322203 A JP H04322203A
- Authority
- JP
- Japan
- Prior art keywords
- colored layer
- colored layers
- color filter
- press plate
- printing
- 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.)
- Withdrawn
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 claims abstract description 26
- 239000000758 substrate Substances 0.000 claims abstract description 12
- 239000000049 pigment Substances 0.000 claims abstract description 8
- 238000007639 printing Methods 0.000 claims description 25
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000000059 patterning Methods 0.000 claims description 2
- 239000011521 glass Substances 0.000 abstract description 7
- 239000010408 film Substances 0.000 description 11
- 239000000463 material Substances 0.000 description 5
- 238000003825 pressing Methods 0.000 description 4
- 238000007645 offset printing Methods 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- 238000005530 etching Methods 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000001055 blue pigment Substances 0.000 description 1
- 239000005388 borosilicate glass Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- XCJYREBRNVKWGJ-UHFFFAOYSA-N copper(II) phthalocyanine Chemical compound [Cu+2].C12=CC=CC=C2C(N=C2[N-]C(C3=CC=CC=C32)=N2)=NC1=NC([C]1C=CC=CC1=1)=NC=1N=C1[C]3C=CC=CC3=C2[N-]1 XCJYREBRNVKWGJ-UHFFFAOYSA-N 0.000 description 1
- 230000005574 cross-species transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- XXJWXESWEXIICW-UHFFFAOYSA-N diethylene glycol monoethyl ether Chemical compound CCOCCOCCO XXJWXESWEXIICW-UHFFFAOYSA-N 0.000 description 1
- 229940075557 diethylene glycol monoethyl ether Drugs 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000001056 green pigment Substances 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000001054 red pigment Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000004447 silicone coating Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Abstract
Description
【０００１】［発明の目的］[Object of the invention]
【０００２】0002
【産業上の利用分野】本発明は、カラー液晶表示装置な
どに使用されるカラーフィルタの製造方法に係り、さら
に詳しくは、画素部に色素を配置するにあたり印刷法を
用いるカラーフィルタの製造方法に関する。FIELD OF THE INVENTION The present invention relates to a method of manufacturing a color filter used in color liquid crystal display devices, and more particularly, to a method of manufacturing a color filter that uses a printing method to arrange pigments in pixel areas. .
【０００３】0003
【従来の技術】カラー液晶表示装置などに使用されるカ
ラーフィルタの形成方法として、従来より各種提案され
ている。その中で、画素部に色素を配置するにあたり印
刷法を用いるものは、製造工程が少なく量産性に優れ、
製造コストを低減することができるという特徴を有する
。2. Description of the Related Art Various methods have been proposed for forming color filters used in color liquid crystal display devices and the like. Among these, those that use printing methods to place pigments in pixel areas have fewer manufacturing steps and are superior in mass production.
It has the feature of being able to reduce manufacturing costs.
【０００４】この方法は、透明基板の一方の面上に画素
部を開孔させた遮光層をパターン形成し、この上に、顔
料を含有するインクを用いて直接所定の画素パターンを
印刷することにより、画素部に着色層を形成するもので
、通常、赤、緑、青の３原色に対応する ３種類のイン
クを順次印刷した後、一括乾燥処理を行って、各画素部
に赤、緑、青の各着色層を形成している。[0004] This method involves forming a pattern on one side of a transparent substrate with a light-shielding layer having holes in pixel areas, and directly printing a predetermined pixel pattern on this layer using ink containing a pigment. This method forms a colored layer in the pixel area. Normally, three types of ink corresponding to the three primary colors of red, green, and blue are sequentially printed, and then a batch drying process is performed to color each pixel area with red, green, and green. , forming each blue colored layer.
【０００５】しかしながら、この印刷法では、インクが
粘調状態で各転写媒体間を圧力を受けながら転写される
ため、印刷パターン内で膜厚が不均一となる難点があっ
た。また、インクの強い内部凝集力から生ずる大きな表
面張力のため断面形状は弧を描き、画素部内の膜厚も均
一性に乏しいものであった。However, this printing method has the disadvantage that the ink in a viscous state is transferred between the transfer media while being under pressure, resulting in non-uniform film thickness within the printed pattern. Further, due to the large surface tension resulting from the strong internal cohesive force of the ink, the cross-sectional shape was arcuate, and the film thickness within the pixel portion was also poor in uniformity.
【０００６】このため、インク印刷後、印刷面にフィル
ムのような平滑な素材を重ね、加熱加圧することにより
、表面の平坦化、膜厚の均一化を図っている。[0006] For this reason, after ink printing, a smooth material such as a film is placed on the printed surface and heated and pressed to flatten the surface and make the film thickness uniform.
【０００７】しかしながら、このようなプレス処理によ
っても、弧を描く印刷層の中央部分の表面は平坦化され
るものの、膜厚の均一化は不十分で、そのうえ、印刷法
は平面的な寸法精度にやや難があり、パターンが蛇行形
成されるおそれがあるが、そのような場合に上記プレス
処理を行うと、蛇行したパターンはそのまま平坦化され
、この平坦化された部分が画素部からずれたり、プレス
により押出された余分なインクが隣接する画素部にはみ
出すおそれがあった。さらに、印刷パターンのエッジの
切れが悪いという難点もあった。[0007] However, even though such press processing flattens the surface of the central part of the arched printing layer, it is insufficient to make the film thickness uniform; However, if the above pressing process is performed in such a case, the meandering pattern will be flattened as it is, and the flattened part will not be displaced from the pixel area. There was a risk that excess ink extruded by the press would overflow into adjacent pixel areas. Furthermore, there was also the problem that the edges of the printed pattern were poorly cut.
【０００８】このような現象は、画素内の色むら、画面
全体の色むらとなって現れ、カラーフィルタの信頼性を
著しく損なうものであった。[0008] Such a phenomenon appears as color unevenness within a pixel and color unevenness on the entire screen, and significantly impairs the reliability of the color filter.
【０００９】[0009]
【発明が解決しようとする課題】このように、従来の印
刷法を用いるカラーフィルタの製造方法では、印刷パタ
ーンの膜厚の均一性を改善するために、印刷パターン表
面にフィルムのような平滑な素材を重ねてプレス処理を
行っている。[Problems to be Solved by the Invention] As described above, in the method of manufacturing a color filter using the conventional printing method, in order to improve the uniformity of the film thickness of the printed pattern, it is necessary to coat the surface of the printed pattern with a smooth layer like a film. The materials are layered and pressed.
【００１０】しかしながら、平坦化された部分が画素部
からずれたり、プレスにより押出された余分なインクが
隣接する画素部にはみ出すおそれがあり、また、印刷パ
ターンのエッジの切れも悪いため、画素内の色むら、画
面全体の色むらを生ずるという難点があった。However, there is a risk that the flattened portion may shift from the pixel portion, excess ink pushed out by the press may spill over into the adjacent pixel portion, and the edges of the printed pattern are not sharp enough to cause damage within the pixel. However, there was a problem in that it caused color unevenness on the entire screen.
【００１１】本発明はこのような従来技術の難点を解消
するためになされたもので、製造工程が少なく量産性に
優れ、製造コストを低減することができるうえ、画素内
の色むら、画面全体の色むらのない高品位なカラーフィ
ルタを製造することができる方法を提供することを目的
とする。[0011] The present invention has been made in order to solve the drawbacks of the conventional technology, and has a small number of manufacturing steps and is excellent in mass productivity, and can reduce manufacturing costs. An object of the present invention is to provide a method capable of manufacturing a high-quality color filter without color unevenness.
【００１２】［発明の構成］[Configuration of the invention]
【００１３】[0013]
【課題を解決するための手段】本発明は、透明基体の一
主面上に、画素部を開孔させた遮光層をパターン形成す
る工程と、前記画素部に顔料を含有するインクを印刷し
て着色層を形成する工程と、前記着色層上にプレス板を
当接させて前記着色層を加熱加圧する工程とを有するカ
ラ−フィルタの製造方法において、前記プレス板の前記
着色層との当接面の前記画素部に対応する位置に、前記
着色層の形状を補正する凹部が設けられていることを特
徴とするものである。[Means for Solving the Problems] The present invention includes a step of patterning a light-shielding layer with holes in pixel portions on one main surface of a transparent substrate, and printing an ink containing a pigment in the pixel portions. In the method for manufacturing a color filter, the method includes the steps of: forming a colored layer by pressing the colored layer; and heating and pressing the colored layer by bringing a press plate into contact with the colored layer. The invention is characterized in that a concave portion for correcting the shape of the colored layer is provided at a position corresponding to the pixel portion on the contact surface.
【００１４】本発明に使用されるプレス板としては、特
にその材質が限定されるものではないが、少なくとも加
熱加圧時に変形することがなく、かつ、少なくとも着色
層に当接される面を、シリコ−ンなどの不活性物質をコ
ーティングするなどして、加熱加圧時にも着色層を構成
するインクや既に形成されている遮光部と接着しない材
質とすることが望ましい。なお、表面の凹部の形成は、
たとえば、画素部に対応する所定の開孔部を設けたマス
クを、表面が平滑なプレス板に重ね、マスク開孔部をエ
ッチングすることにより形成することができる。The material of the press plate used in the present invention is not particularly limited, but at least it does not deform when heated and pressurized, and at least the surface that comes into contact with the colored layer is It is desirable to use a material that does not adhere to the ink constituting the colored layer or the already formed light shielding part even when heated and pressurized, by coating it with an inert substance such as silicone. Note that the formation of the recesses on the surface is as follows:
For example, it can be formed by stacking a mask with predetermined openings corresponding to the pixel portions on a press plate with a smooth surface and etching the mask openings.
【００１５】[0015]
【作用】本発明方法においては、顔料を含有するインク
を印刷して形成した着色層上にプレス板を当接させて、
その着色層を加熱加圧する工程において、プレス板の着
色層との当接面には、画素部に対応する位置に所定の凹
部が設けられているので、着色層を凹部に規制された位
置、形状に補正形成することができ、印刷された着色層
が蛇行していた場合であっても、着色層が画素部よりず
れたり、その一部が隣接する画素部にはみ出すおそれは
ない。また、印刷パターンのエッジ形状のシャープ性を
確保することができる。したがって、画素内の色むら、
画面全体の色むらのない、表示品位に優れたカラーフィ
ルタを得ることができる。[Operation] In the method of the present invention, a press plate is brought into contact with a colored layer formed by printing an ink containing a pigment,
In the step of heating and pressing the colored layer, a predetermined recess is provided on the contact surface of the press plate with the colored layer at a position corresponding to the pixel portion, so that the colored layer is placed at a position regulated by the recess. The shape can be corrected and formed, and even if the printed colored layer is meandering, there is no fear that the colored layer will shift from the pixel area or that part of it will protrude into the adjacent pixel area. Further, the sharpness of the edge shape of the printed pattern can be ensured. Therefore, color unevenness within a pixel,
It is possible to obtain a color filter with excellent display quality without color unevenness on the entire screen.
【００１６】[0016]
【実施例】以下、本発明の実施例を、その製造工程を示
す図１（ａ）〜（ｃ）に基づいて説明する。EXAMPLES Examples of the present invention will be described below with reference to FIGS. 1(a) to 1(c) showing the manufacturing process thereof.
【００１７】まず、図１（ａ）に示すように、硼珪酸ガ
ラス板（コーニング社製７０５９）に表面洗浄処理を施
して得られた１．１ｍｍ 厚のガラス基板１の一主面上
に、 ０．１５ μｍ厚さのＣｒ薄膜をスパッタリング
法などにより成膜した後、フォトリソグラフ法により画
素部として開孔すべき部分をエッチング除去して所定の
パターンを有する遮光層２を設けた。次いで、この上に
、所定のパターンで赤色、緑色、青色の各着色層３ａ、
３ｂ、３ｃをグラビアオフセット印刷により形成した。
すなわち、第１色目用印刷インク、たとえば青色顔料フ
タロシアニンブルーとエポキシ樹脂と溶剤ジエチレング
リコールモノエチルエーテルとを主成分とする青色用印
刷インクを用いて、グラビアオフセット印刷により ４
μｍ厚の青色パターンを印刷し、同様に、第２色目用印
刷インク、たとえば緑色顔料を含有する緑色用印刷イン
ク、第３色目用印刷インク、たとえば赤色顔料を含有す
る赤色用印刷インクを用いて、グラビアオフセット印刷
によりそれぞれのパターンを同厚に順に印刷した後、こ
れらの印刷パターンを１００ ℃の温度で １時間加熱
乾燥し固化させて青色、緑色、赤色の各着色層３ａ、３
ｂ、３ｃを形成した。なお、印刷パターンはストライプ
で、各色が長さ１４０ｍｍ 、幅 １１０μｍ、ピッチ
幅 ３３０μｍで、青、緑、赤の順にそれぞれ ６４０
ピッチ印刷した。一方、プレス板４として、表面にシリ
コーン被覆を有する厚さが１０μｍ のプラスチック板
の片面に、深さ０．５ μｍ、幅 １００μｍ、長さ
１４０ｍｍの凹部４ａを１０μｍ間隔で１３２０条形成
して、プレス板４を作製した。First, as shown in FIG. 1(a), on one main surface of a 1.1 mm thick glass substrate 1 obtained by surface cleaning a borosilicate glass plate (7059 manufactured by Corning), After forming a Cr thin film with a thickness of 0.15 μm by sputtering or the like, the portions to be opened as pixel portions were etched away by photolithography to provide a light-shielding layer 2 having a predetermined pattern. Next, on top of this, red, green, and blue colored layers 3a are applied in a predetermined pattern,
3b and 3c were formed by gravure offset printing. That is, by gravure offset printing using a printing ink for the first color, for example, a blue printing ink whose main components are a blue pigment phthalocyanine blue, an epoxy resin, and a solvent diethylene glycol monoethyl ether.
A blue pattern with a thickness of μm is printed, and similarly, a second color printing ink, for example a green printing ink containing a green pigment, and a third color printing ink, for example a red printing ink containing a red pigment, are used. After sequentially printing each pattern with the same thickness by gravure offset printing, these printed patterns are heated and dried at a temperature of 100° C. for 1 hour to solidify and form blue, green, and red colored layers 3a, 3.
b, 3c were formed. The printing pattern is a stripe, with each color having a length of 140 mm, a width of 110 μm, and a pitch width of 330 μm, with 640 stripes each in the order of blue, green, and red.
Pitch printed. On the other hand, as the press plate 4, one side of a plastic plate with a thickness of 10 μm and having a silicone coating on the surface is coated with a depth of 0.5 μm, a width of 100 μm, and a length of 100 μm.
A press plate 4 was produced by forming 1320 140 mm recesses 4a at intervals of 10 μm.
【００１８】次に、このプレス板４と、上記青色、緑色
、赤色の各着色層３ａ、３ｂ、３ｃおゆび遮光層２が形
成されたガラス基板１とを、図１（ｂ）に示すように、
ガラス基板１の着色層３形成面とプレス板４の凹部４ａ
形成面とを対向させ、かつ遮光層２の開孔部２ａと凹部
４ａとの精密な位置合わせを行って重ね合わせた後、温
度９０℃で厚さ方向にプレスした。Next, this press plate 4 and the glass substrate 1 on which the blue, green and red colored layers 3a, 3b, 3c and the light shielding layer 2 are formed are assembled as shown in FIG. 1(b). To,
Colored layer 3 forming surface of glass substrate 1 and recess 4a of press plate 4
After overlapping with the forming surfaces facing each other and precisely aligning the openings 2a and the recesses 4a of the light-shielding layer 2, they were pressed in the thickness direction at a temperature of 90°C.
【００１９】この後、プレス板４をガラス基板１の着色
層３から外したところ、図１（ｃ）に示すように、凹部
４ａに対応する部分の表面が平坦化された着色層３が形
成されており、その膜厚は平坦な部分で２．７ μｍで
あった。また、これを微分干渉計を用いて高倍率に拡大
し観察したところ、隣接画素部への着色層３のはみ出し
、平坦化された部分の遮光層開孔部２ａ、すなわち画素
部からのずれなどは見られなかった。また着色層３のエ
ッジもシャープに形成されていた。さらに肉眼で外観を
観察し色むらの有無を調べたが、全面で色むらは観察さ
れなかった。After this, when the press plate 4 was removed from the colored layer 3 of the glass substrate 1, the colored layer 3 was formed with a flattened surface in the portion corresponding to the recess 4a, as shown in FIG. 1(c). The film thickness was 2.7 μm at the flat part. In addition, when observing this under high magnification using a differential interferometer, it was found that the colored layer 3 protruded into adjacent pixel areas, and the flattened area was shifted from the light-shielding layer aperture 2a, that is, the pixel area. was not seen. Furthermore, the edges of the colored layer 3 were also formed sharply. Furthermore, the appearance was visually observed to check for color unevenness, but no color unevenness was observed on the entire surface.
【００２０】なお、図示を省略したが、この後、常法に
より、着色層３上に、さらに、透明保護膜、透明電極、
配向膜を順に形成してカラーフィルタを完成した。Although not shown in the drawings, a transparent protective film, a transparent electrode,
A color filter was completed by sequentially forming alignment films.
【００２１】このように、本発明の方法においては、着
色層３の形成にあたり、パターン形状の精度にやや問題
の有る印刷法を用いるものの、その形状を容易に補正し
実質的精度を高めることができるので、印刷法の長所は
そのままに、表示品位を向上させることができる。[0021] As described above, in the method of the present invention, although a printing method which has some problems with the precision of pattern shape is used to form the colored layer 3, the shape can be easily corrected and the substantial precision can be improved. Therefore, the display quality can be improved while maintaining the advantages of the printing method.
【００２２】なお、本発明は、上記実施例に限定される
ものではなく、たとえば、ガラス基板１に代えて、アク
リル樹脂基板のような透明基板を用いることができる。
また、遮光層２は、上記したスパッタリング法により成
膜したＣｒ薄膜をパターンエッチングする方法の他、黒
色顔料を感光性樹脂材料中に分散させた溶液を塗布して
形成した薄膜を露光してパターン形成する方法などを用
いることができる。It should be noted that the present invention is not limited to the above embodiments, and for example, instead of the glass substrate 1, a transparent substrate such as an acrylic resin substrate can be used. The light shielding layer 2 can be formed by pattern etching a Cr thin film formed by the sputtering method described above, or by exposing a thin film formed by applying a solution in which black pigment is dispersed in a photosensitive resin material to form a pattern. It is possible to use a method of forming.
【００２３】さらに、着色層３の印刷にあたって用いる
インクや印刷方法も、特に上記したものに限定されるも
のではなく、カラーフィルタの製造にあたり従来より一
般に用いられているものはすべて適用可能である。Furthermore, the ink and printing method used for printing the colored layer 3 are not particularly limited to those described above, and any methods commonly used in the past for manufacturing color filters can be applied.
【００２４】[0024]
【発明の効果】以上説明したように、本発明方法によれ
ば、いわゆる印刷法により形成した着色層上にプレス板
を当接させてその表面を平坦化するに工程において、プ
レス板として、その着色層との当接面の所定位置に所定
の凹部を設けた構造のプレス板を用いるので、印刷法に
よる着色層のパターンの乱れや膜厚の不均一性を用意に
改善することができる。したがって、製造工程が少なく
量産性に優れ、製造コストの低減が可能という印刷法の
特徴を備え、かつ、得られるカラーフィルタの画素内の
色むら、画面全体の色むらの発生を防止して品位を向上
させることができる。As explained above, according to the method of the present invention, in the process of flattening the surface of a colored layer formed by a so-called printing method by bringing a press plate into contact with the colored layer, Since a press plate having a structure in which predetermined recesses are provided at predetermined positions on the contact surface with the colored layer is used, it is possible to easily improve the disordered pattern of the colored layer and the non-uniformity of the film thickness caused by the printing method. Therefore, it has the characteristics of a printing method that has few manufacturing steps, is excellent in mass production, and can reduce manufacturing costs.It also prevents color unevenness within the pixels of the resulting color filter and color unevenness on the entire screen, thereby improving quality. can be improved.
【図１】本発明の一実施例のカラーフィルタの製造工程
を示す図である。FIG. 1 is a diagram showing a manufacturing process of a color filter according to an embodiment of the present invention.
１………ガラス基板 ２………遮光層 ３、３ａ、３ｂ、３ｃ………着色層 ４………プレス板 ４ａ………凹部 1......Glass substrate 2...... Light shielding layer 3, 3a, 3b, 3c……colored layer 4...Press board 4a……Concavity
Claims (1)
させた遮光層をパターン形成する工程と、前記画素部に
顔料を含有するインクを印刷して着色層を形成する工程
と、前記着色層上にプレス板を当接させて前記着色層を
加熱加圧する工程とを有するカラ−フィルタの製造方法
において、前記プレス板の前記着色層との当接面の前記
画素部に対応する位置に、前記着色層の形状を補正する
凹部が設けられていることを特徴とするカラ−フィルタ
の製造方法。1. A step of patterning a light-shielding layer with holes in pixel portions on one main surface of a transparent substrate, and a step of printing an ink containing a pigment on the pixel portions to form a colored layer. , a method for manufacturing a color filter comprising the step of bringing a press plate into contact with the colored layer and heating and pressurizing the colored layer, corresponding to the pixel portion of the surface of the press plate in contact with the colored layer; A method for manufacturing a color filter, characterized in that a recessed portion for correcting the shape of the colored layer is provided at a position where the colored layer is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3090406A JPH04322203A (en) | 1991-04-22 | 1991-04-22 | Manufacture of color filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3090406A JPH04322203A (en) | 1991-04-22 | 1991-04-22 | Manufacture of color filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04322203A true JPH04322203A (en) | 1992-11-12 |
Family
ID=13997706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3090406A Withdrawn JPH04322203A (en) | 1991-04-22 | 1991-04-22 | Manufacture of color filter |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04322203A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995012494A1 (en) * | 1993-11-03 | 1995-05-11 | Corning Incorporated | Color filter and method of printing |
| US5544582A (en) * | 1993-11-03 | 1996-08-13 | Corning Incorporated | Method for printing a color filter |
-
1991
- 1991-04-22 JP JP3090406A patent/JPH04322203A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995012494A1 (en) * | 1993-11-03 | 1995-05-11 | Corning Incorporated | Color filter and method of printing |
| US5544582A (en) * | 1993-11-03 | 1996-08-13 | Corning Incorporated | Method for printing a color filter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Application deemed to be withdrawn because no request for examination was validly filed |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19980711 |