JPH0325416A - Production of liquid crystal display device - Google Patents
Production of liquid crystal display deviceInfo
- Publication number
- JPH0325416A JPH0325416A JP16188389A JP16188389A JPH0325416A JP H0325416 A JPH0325416 A JP H0325416A JP 16188389 A JP16188389 A JP 16188389A JP 16188389 A JP16188389 A JP 16188389A JP H0325416 A JPH0325416 A JP H0325416A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- substrate
- grooves
- substrates
- display device
- 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.)
- Pending
Links
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 85
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- 239000000758 substrate Substances 0.000 claims abstract description 44
- 238000000034 method Methods 0.000 claims description 10
- 239000011159 matrix material Substances 0.000 abstract description 4
- 238000007789 sealing Methods 0.000 abstract description 4
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 238000012856 packing Methods 0.000 abstract 1
- 239000003566 sealing material Substances 0.000 description 7
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 238000009849 vacuum degassing Methods 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
Landscapes
- Liquid Crystal (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、液晶表示装置の製造方法に関し、もつと詳し
くは、貼合せるべき一対の基板間に液晶を介在させるた
めの方法に関する．
従来の技術
最近の液晶表示装置は大形化しつつあるが、その貼きせ
るべき一対の基板間への液晶の充填は、従来から知られ
ているいわゆる真空注入方法で行っている．この真空注
入方法というのは、２枚の対向する基板の液晶を充填す
べき空間をエボキシ樹脂などの接着剤で枠状のパターン
にけ着形成して、その液晶充填空間が形或されるように
して２枚の基板を接着して固定し、この接着剤の一部に
、液晶充填空間と外部とを連通する注入孔を形或してお
く．この状態で周囲を真空状態とし、容器に貯留されて
いる液晶内に、前記注入孔を浸漬し、その後周囲を大気
圧とする．これによって液晶が注入孔から基板間の接着
剤で囲まれた真空の液晶充填空間に吸込まれて注入され
る．
発明が解決すべき課題
このような先行技術では、液晶表示装置が大形化するに
件って、その液晶を注入するために要する時間は、その
液晶が充填される空間の面積比の約２乗に比例した長時
間を必要とする。たとえばポケット形の電子式卓上計算
機に用いられる小形の液晶表示装置では、液晶の注入の
ために約３〜５分必要であって短いけれども、たとえば
ワードプロセッサなどにおいて用いられる大形の液晶表
示装置では、約６０〜１２０分もの長時間を必要とする
。したがって今後の液晶表示装置の大形化に伴い、作業
効率のよい製造方法が必要となる。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a method for manufacturing a liquid crystal display device, and more particularly to a method for interposing a liquid crystal between a pair of substrates to be bonded. Background of the Invention Modern liquid crystal display devices are becoming larger in size, but liquid crystal is filled between a pair of substrates by a conventionally known vacuum injection method. This vacuum injection method involves forming a frame-shaped pattern using an adhesive such as epoxy resin to form a space on two opposing substrates to be filled with liquid crystal, and then forming the space to fill the liquid crystal. The two substrates are glued and fixed together, and an injection hole is formed in a part of the adhesive to communicate the liquid crystal filling space with the outside. In this state, the surroundings are brought to a vacuum state, the injection hole is immersed in the liquid crystal stored in the container, and then the surroundings are brought to atmospheric pressure. As a result, the liquid crystal is sucked through the injection hole and injected into the vacuum liquid crystal filling space surrounded by adhesive between the substrates. Problems to be Solved by the Invention In such prior art, as liquid crystal display devices become larger, the time required to inject the liquid crystal is approximately 2 times the area ratio of the space filled with the liquid crystal. It takes a long time proportional to the power. For example, a small liquid crystal display device used in a pocket-type electronic desktop calculator requires about 3 to 5 minutes to inject the liquid crystal, which is short, but a large liquid crystal display device used in a word processor, etc. It requires a long time of about 60 to 120 minutes. Therefore, as liquid crystal display devices become larger in size in the future, a manufacturing method with high work efficiency will be required.
本発明の目的は、生産性が向上された液晶表示装置の製
造方法を提供することである．課題を解決するための手
段
本発明は、貼合せるべき一対の基板のうち、少なくとも
一方の基板の凹凸のある表面上に液晶を供給し、
次に前記一方基板上に他方の基板を重ムて、液晶を封止
することを特徴とする液晶表示装置の製造方法である。An object of the present invention is to provide a method for manufacturing a liquid crystal display device with improved productivity. Means for Solving the Problems The present invention provides liquid crystal on the uneven surface of at least one of a pair of substrates to be bonded together, and then stacks the other substrate on top of said one substrate. , a method for manufacturing a liquid crystal display device characterized by sealing liquid crystal.
作用
本発明に従えば、貼合せるべき一対の基板のうち、少な
くとも一方の基板の凹凸のある表面上に液晶を供給する
。この凹凸のある表面というのは、たとえば単純マトリ
クス形液晶表示装置において、行電極または列電極を配
向膜で被覆した状態において、配向膜の表面には、行電
極または列電極の相互の間に対応した溝が形或され、こ
のような溝の１！）る表面に、液晶を滴下すると、その
液晶が渭に沿って一定距離広がる。一般に配向膜と液晶
とは涸れ性が良好であり、上述の細い溝に液晶がＴ・め
定める一定距離にわたって円滑に広がる．このような湧
内に液晶を滴下し、さらにその液晶の供給量を、前記一
方基板の表面全体が覆われるようにして十分な呈を供給
する．その後、前記一方基板上に他方の基板を重ｔコる
ゆこうして基板間の液晶充填空間に液晶を充填して封止
することができる．
このような方法は、作業効率が良好であり、時間が短く
てすみ、生産性に優れている。According to the present invention, liquid crystal is supplied onto the uneven surface of at least one of a pair of substrates to be bonded. For example, in a simple matrix type liquid crystal display device, when the row electrodes or column electrodes are covered with an alignment film, this uneven surface has a surface that corresponds to the area between the row electrodes or column electrodes. A groove is formed, one of such grooves! ) When liquid crystal is dropped onto a surface, the liquid crystal spreads a certain distance along the edge. Generally, the alignment film and the liquid crystal have good drying properties, and the liquid crystal spreads smoothly over a certain distance determined by T in the above-mentioned narrow groove. Liquid crystal is dropped into this well, and the amount of liquid crystal supplied is sufficient to cover the entire surface of the one substrate. Thereafter, by stacking the other substrate on top of the one substrate, the liquid crystal filling space between the substrates can be filled with liquid crystal and sealed. Such a method has good working efficiency, requires less time, and is excellent in productivity.
他方の基板にもまた液晶を付着ないしは塗布しておき、
こうして２−）の基板を重わて液晶を封止するようにし
てもよい．
実施例
第１図は本発明の一実施例の液晶表示装置１の製造方法
を示す全体の斜視図であり、第２図はその！！！遣方法
の各工程を示す図である。この液晶表示装置ｌは、貼今
せられるべき一対のガラス基板２．３を有し、これらの
基板２．３間にツイストネマティック（略称ＴＮ）など
の液晶が充填されて、封止される．この液晶表示装置は
いわゆる単純マトリクスｒｆ４造を有し、一方の基板２
には後述の第５図および第１０図に示されているように
、透明な行電極４が形戊され、その上に全体を壇ってポ
リイミドなどから戒る配向ＷＡ５が形或される．この配
向膜５はラビング処理される．電極４の相互間において
、配向１１！ｉｌ５の表面には凹んだ渭６が形成され、
電極４に対応して凸条７が形成される．またもう１つの
基板３上には、前述の行電極４に直交する列電極８が形
成され、その電極にわたって全面的に配向膜９が形威さ
れこの配向ＷＡ９はラビング処理される。Also attach or apply liquid crystal to the other board,
In this way, the liquid crystal may be sealed by stacking the substrates in 2-). Embodiment FIG. 1 is an overall perspective view showing a method of manufacturing a liquid crystal display device 1 according to an embodiment of the present invention, and FIG. 2 is the same! ! ! It is a diagram showing each step of the sending method. This liquid crystal display device l has a pair of glass substrates 2.3 to be pasted, and a liquid crystal such as twisted nematic (abbreviated as TN) is filled between these substrates 2.3 and sealed. This liquid crystal display device has a so-called simple matrix RF4 structure, with one substrate 2
As shown in FIGS. 5 and 10, which will be described later, a transparent row electrode 4 is formed, and a transparent row electrode WA5 made of polyimide or the like is formed thereon. This alignment film 5 is subjected to a rubbing treatment. Between the electrodes 4, the orientation 11! A concave ridge 6 is formed on the surface of il5,
A protrusion 7 is formed corresponding to the electrode 4. Further, on another substrate 3, a column electrode 8 orthogonal to the aforementioned row electrode 4 is formed, and an alignment film 9 is formed over the entire surface of the electrode, and this alignment WA9 is subjected to a rubbing treatment.
一方基板２の配向ｒ！４５上には、液晶が充填されて封
止されるべき領域を囲んでシール材１ｌが第２図のステ
ップｎ１で付着される。このシール材１１は、たとえば
熱硬化性エボキシ樹脂などであってもよく、枠状である
。このようなシール材１ｌは、たとえばスクリーン印刷
によって形成され、あるいはまたノズルから吐出するよ
うにしたディスベンサを用いて形或するようにしてもよ
い。こうしてシール材１１で囲まれた液晶が充填されて
封止されるｉｉｉ域は第１図（１）の参照符ｌ２で示さ
れる。そこで第１図く２）および第２図のステップｒ＋
２で示されるように、ディスベンサのノズル１３から
液晶を満６上に滴下する。このノズル１３の移動方向１
４は電極４および講６の長手方向に垂直方向であり、液
晶が充填される領域１２における講６の全長の約１７２
の位置で，ｐ）る。すなＡ）ちｌ １＝１２の位置でノ
ズル１３を移動する。On the other hand, the orientation r! of the substrate 2! A sealing material 1l is applied on the liquid crystal 45 in step n1 of FIG. 2, surrounding the area to be filled with liquid crystal and sealed. This sealing material 11 may be made of thermosetting epoxy resin, for example, and has a frame shape. Such a sealing material 1l may be formed, for example, by screen printing, or may be shaped using a dispenser that is discharged from a nozzle. Area iii, surrounded by the sealing material 11 and filled with liquid crystal and sealed, is indicated by reference numeral 12 in FIG. 1(1). Therefore, step 2) in Figure 1 and step r+ in Figure 2
As shown in 2, liquid crystal is dropped from the nozzle 13 of the dispenser onto 6. Moving direction 1 of this nozzle 13
4 is a direction perpendicular to the longitudinal direction of the electrode 4 and the tube 6, and is approximately 172 mm of the total length of the tube 6 in the region 12 filled with liquid crystal.
At position p). A) Move the nozzle 13 at the 1=12 position.
こうしてノズル１３から液晶を供給する状態は第６図に
示されているとおりである。第６図において液晶は斜線
で示される．ノズル１３の下端部であるノズルロからは
、講６上に液晶が滴下される。The state in which liquid crystal is thus supplied from the nozzle 13 is as shown in FIG. In Figure 6, the liquid crystal is indicated by diagonal lines. Liquid crystal is dripped onto the tube 6 from the nozzle nozzle, which is the lower end of the nozzle 13.
この液晶は、配向膜５と濡れ性が良好であり、したが１
てその液晶は細い講６に沿って予め定める距離に広がり
、講６の液晶充填頭域１２の全長にわたって広がる。こ
の液晶は第７図において参！！復符１５で示されてわり
、この第７図の切断面線■■から見た断面は第８図に示
されている。ノズル１３から供給される｝α晶１５の量
は、講６才３よび凸条７の表面の全面にわたって均一に
広がるに十分な量に定める．このようにして液晶が配向
膜５の全面にわたって供給された状態は第１１！ｌ （
３）および第９図にそれぞれ示されている．そこで次に
液晶１５が供給された基板２の雰囲気を真空とし、たと
えば１０−３Ｔｏｒｒ程度する．これによって液晶１５
に含まれている混入物、たとえば液晶１５内の気泡など
が除去される．このような真空脱泡の４１１造の工程は
第２図のステップｎ３で示されている．
そこでこの真空状態において、基板２上に第１図（５）
で示されるもう１つの基板３を重合せて、これらの基板
２．３とシール材１１とによって液晶１５を充填して封
止する．このような基板２．３を重合せて貼きせる状態
では、第２図ではステップｎ４において基板３に関して
も真空脱泡の工程として示されている．基板２．３を貼
合せる工程は巣２図のステッグｎ５で示される．シール
材１１はステップｎ６において硬化し、こうして基板２
．３が一体的に固定され、液晶表示装置が完隼
戒する．
第１０図を参照して、電極４の幅ａ１は約３００μｒｎ
であり、この電極４の相互間の距離ｂ１は３０μｍであ
り、電極４の厚みＣ１は１２００〜１３００人であり、
配向！！５の厚みｄ１は４００〜５００人である．この
ような構成は電極８および配向Ｉｌｌ９に関しても同様
である．液晶１５が充填される空間の最小間隔ｅ１は５
〜６μｒｎである．液晶としては、スーバツイストネマ
ティック（略称ＳＴＮ）形であってもよく、その他の液
晶であってもよい．電極４．８は、インジウム錫酸化物
（略称ＩＴＯ）などの材料から戒ってもよい．本発明は
、上述の行電極４と列電極８とを有する単純マトリクス
液晶表示装置に関連して実施されるだけでなく、その他
の楕或を有する液晶表示装置に関連して広く実施するこ
とができる．前記他方基板３の配向膜９，１０にはまた
、液晶がノズル１３などを用いて前述と同様にして付着
されていてもよい．
上述の実施例によれば、基板２．３間に液晶を充填して
封止する製造に要する時間が、前述の６０〜１２０分か
ら、１０〜３０分程度にまで、大略的に約１／４以下に
′＠縮することができたことが確認された．
発明の効果
以上のように本発明によれば、貼合せるべき一対の基板
間に、液晶を短時間で介在して封止することが可能とな
り、作業効率が良好であり生産性が向上される．This liquid crystal had good wettability with the alignment film 5, but 1
The liquid crystal spreads along the narrow channel 6 a predetermined distance and extends over the entire length of the liquid crystal filled head area 12 of the channel 6. This liquid crystal can be seen in Figure 7! ! It is indicated by double numeral 15, and a cross section taken from the cutting plane line ■■ in FIG. 7 is shown in FIG. The amount of α-crystal 15 supplied from the nozzle 13 is determined to be sufficient to uniformly spread over the entire surface of the ridges and protrusions 7. The state in which the liquid crystal is thus supplied over the entire surface of the alignment film 5 is the 11th state! l (
3) and Fig. 9, respectively. Therefore, next, the atmosphere of the substrate 2 to which the liquid crystal 15 is supplied is set to a vacuum, for example, about 10 -3 Torr. As a result, the liquid crystal 15
Contaminants contained in the liquid crystal 15, such as air bubbles in the liquid crystal 15, are removed. Such a vacuum degassing 411 manufacturing process is shown in step n3 in FIG. Therefore, in this vacuum state, the image shown in FIG. 1 (5) is placed on the substrate 2.
Another substrate 3 shown by is superimposed, and liquid crystal 15 is filled and sealed by these substrates 2.3 and sealing material 11. In such a state where the substrates 2 and 3 are overlapped and pasted, FIG. 2 shows a vacuum degassing step for the substrate 3 in step n4. The process of bonding the substrate 2.3 is shown by steg n5 in Figure 2. The sealing material 11 is cured in step n6, thus sealing the substrate 2.
．． 3 are fixed integrally, and the liquid crystal display device is fully activated. Referring to FIG. 10, the width a1 of the electrode 4 is approximately 300 μrn.
, the distance b1 between the electrodes 4 is 30 μm, the thickness C1 of the electrodes 4 is 1200 to 1300,
Orientation! ! The thickness d1 of 5 is 400 to 500 people. Such a configuration is the same for the electrode 8 and the orientation Ill9. The minimum interval e1 of the space filled with liquid crystal 15 is 5
~6 μrn. The liquid crystal may be of sub-twist nematic (abbreviated as STN) type or other liquid crystal. The electrode 4.8 may be made of a material such as indium tin oxide (abbreviated as ITO). The present invention can be implemented not only in connection with a simple matrix liquid crystal display device having row electrodes 4 and column electrodes 8 as described above, but also in connection with a wide range of other liquid crystal display devices having ellipses. can. Liquid crystal may also be attached to the alignment films 9 and 10 of the other substrate 3 using the nozzle 13 or the like in the same manner as described above. According to the embodiment described above, the time required for manufacturing to fill and seal the space between the substrates 2 and 3 with liquid crystal is approximately 1/4 of the above-mentioned 60 to 120 minutes to approximately 10 to 30 minutes. It was confirmed that the following ′@ could be reduced. Effects of the Invention As described above, according to the present invention, it becomes possible to interpose and seal a liquid crystal between a pair of substrates to be bonded in a short time, improving work efficiency and improving productivity. ．．
【図面の簡単な説明】
第１図は本発明の一実施例の製造方法を説明するための
斜視図、第２図はその実施例の製造方法の各工程を示す
図、第３図は基板２の配向膜５に存在する渭６に液晶１
５をノズル１３から滴下して供給する状態を示す斜視図
、第４図は第３図に示される製造工程の切断面線ＩＶ−
ｒｌｌから見た断面図、第５図は第３図の切断面線■−
■から見た断面図、第６図は液・晶１５をすべての渭６
に供給しつつある状態を示す斜視図、第７図は第６図に
おける切断面線■−■から見た断面図、第８図は第６図
の切断面線■一■から見た断面図、第９図は基板２の配
向Ｍ５の全面にわたって液晶１５が供給された状態を示
す斜視図、第１０図は本発明によって製造された液晶表
示装ｒｔ１１の拡大断面図である．
１・・・液晶表示装置、２．３・・・基板、４．８・・
・電極、５，９・・・配向膜、１１・・・シール材、１
３・・・ノズル、１５・・・液晶[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 is a perspective view for explaining the manufacturing method of an embodiment of the present invention, Fig. 2 is a diagram showing each step of the manufacturing method of the embodiment, and Fig. 3 is a substrate The liquid crystal 1 is placed on the edge 6 existing in the alignment film 5 of 2.
FIG. 4 is a perspective view showing a state where No. 5 is dripped and supplied from the nozzle 13, and FIG.
A cross-sectional view seen from rll, Figure 5 is the cutting plane line in Figure 3 ■-
Figure 6 is a cross-sectional view of the liquid/crystalline 15 as seen from
Fig. 7 is a sectional view taken from the cutting plane line ■-■ in Fig. 6, and Fig. 8 is a sectional view taken from the cutting plane line ■--■ in Fig. 6. 9 is a perspective view showing a state in which liquid crystal 15 is supplied over the entire surface of orientation M5 of substrate 2, and FIG. 10 is an enlarged sectional view of a liquid crystal display device rt11 manufactured according to the present invention. 1...Liquid crystal display device, 2.3...Substrate, 4.8...
・Electrode, 5, 9... Alignment film, 11... Sealing material, 1
3... Nozzle, 15... Liquid crystal
Claims (1)
の凹凸のある表面上に液晶を供給し、次に前記一方基板
上に他方の基板を重ねて、液晶を封止することを特徴と
する液晶表示装置の製造方法。A liquid crystal characterized by supplying liquid crystal onto the uneven surface of at least one of a pair of substrates to be bonded together, and then stacking the other substrate on top of the one substrate to seal the liquid crystal. A method for manufacturing a display device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16188389A JPH0325416A (en) | 1989-06-22 | 1989-06-22 | Production of liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16188389A JPH0325416A (en) | 1989-06-22 | 1989-06-22 | Production of liquid crystal display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0325416A true JPH0325416A (en) | 1991-02-04 |
Family
ID=15743803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16188389A Pending JPH0325416A (en) | 1989-06-22 | 1989-06-22 | Production of liquid crystal display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0325416A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011027630A1 (en) * | 2009-09-04 | 2011-03-10 | シャープ株式会社 | Screen mask, seal printing method, and liquid crystal display panel produced by using same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5114039A (en) * | 1974-07-25 | 1976-02-04 | Sanyo Electric Co | Hyojipaneruno ekishofunyuhoho |
-
1989
- 1989-06-22 JP JP16188389A patent/JPH0325416A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5114039A (en) * | 1974-07-25 | 1976-02-04 | Sanyo Electric Co | Hyojipaneruno ekishofunyuhoho |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011027630A1 (en) * | 2009-09-04 | 2011-03-10 | シャープ株式会社 | Screen mask, seal printing method, and liquid crystal display panel produced by using same |
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