JPH05281557A - 液晶パネルの製造方法 - Google Patents
液晶パネルの製造方法Info
- Publication number
- JPH05281557A JPH05281557A JP7813392A JP7813392A JPH05281557A JP H05281557 A JPH05281557 A JP H05281557A JP 7813392 A JP7813392 A JP 7813392A JP 7813392 A JP7813392 A JP 7813392A JP H05281557 A JPH05281557 A JP H05281557A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- spacer
- substrates
- crystal panel
- spacers
- 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.)
- Granted
Links
Classifications
-
- 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
- G02F1/1339—Gaskets; Spacers; Sealing of cells
- G02F1/13392—Gaskets; Spacers; Sealing of cells spacers dispersed on the cell substrate, e.g. spherical particles, microfibres
Landscapes
- Liquid Crystal (AREA)
Abstract
位の高い液晶パネルが生産できる方法を提供すること。 【構成】スペーサー11を液晶5に混入し、それを基板
上に滴下することにより、スペーサー散布工程を削減す
る。さらに、この液晶5の滴下の際、配向処理方向4
a、4bによって生ずる交差角が原因となる滴下液晶の
展延形状の縦横比に応じて、滴下間隔6、7を変化させ
て基板1bに滴下する。あるいは、この液晶5を六方対
称を持った形状に滴下する。これらにより、液晶パネル
内にスペーサー11を均一に分散させ、表示品位を向上
させる。また、着色スペーサーを液晶5に混入し、この
液晶5を滴下する。これにより、スペーサーの光漏れ現
象を消滅させ、表示品位を向上させる。
Description
サなどに搭載されている液晶表示装置の液晶パネルの製
造方法に関するものである。
力などの利点により、時計、電卓、ワードプロセッサな
どに利用されている。また昨今では、情報関連機器の発
展に伴い大表示容量、大表示画面のディスプレイの需要
がたかまっている。さらに、ディスプレイのカラー化に
伴い表示品位の高い液晶パネルも求められている。
は図4に示すような構造であり、透明電極10が形成さ
れた基板1a、1bの間に液晶5が封止材3により封入
されている。この基板1a、1bはスペーサー11によ
り一定の間隔(以降、ギャップと記す。)に保たれてお
り、一般には5〜10μmである。また、このスペーサ
ー11は、ポリスチレン系樹脂ボール(例えば、ミクロ
パール(積水ファインケミカル(株)製))のような白
色のものを用いている。
は、(1) 予め基板1a、1bの間隙に封止材3、ス
ペーサー11を設けて組み立てたパネルを、減圧状態に
ある槽内にて、パネルの封止材3の一部に設けた注入口
に液晶5を接するようにし、その後槽内を大気圧に戻し
パネル内に液晶5を充填する真空注入方法と、(2)
予め封止材3を形成した基板1aと、スペーサー11を
混入した液晶5を滴下した基板1b、とを減圧下で重ね
合わせる方法(特開昭62ー89025号公報参照)の
2種類がある。
造方法は次のような課題があった。
表示面積が大きくなると液晶の充填に時間がかかり過ぎ
るという課題がある(例えば、12インチサイズの液晶
パネルでは30分以上かかる)。
合、基板を貼り合わせると同時に液晶を封入することが
できるので、製造方法(1)より短時間に充填できる。
また、予め液晶中にスペーサーを混入しているのでスペ
ーサー散布工程が削減でき、パネル製造上非常に効果が
ある。しかしながら、従来の製造方法(2)において
は、液晶滴下形状について余り検討が行なわれていな
い。
定の方向に配向させるラビング方向に沿って展延する傾
向があり、基板を重ね合わせたときには、図6のように
2枚の基板のラビング方向4a、4bの合成ベクトル方
向に液晶5が楕円状に広がる。この楕円の長軸方向は2
枚の基板に施したラビング方向4a、4bの交差角のう
ち、小さい方の合成ベクトル方向(以降、合成方向Aと
記す。)であり、短軸方向はその大きい方の合成ベクト
ル方向(以降、合成方向Bと記す。)である。同様に、
液晶5中に混入してあるスペーサー11も楕円状に移動
する。従って、液晶を、図5のように隣接する上下左右
の滴下点が等間隔になるような単純格子状(図中、合成
方向Aの滴下間隔6と合成方向Bの滴下間隔7とは等し
い。)に滴下した場合、図7のように液晶5は楕円状に
展延するため、合成方向Bにスペーサー11の存在しな
い部分が発生し、パネル内にスペーサー11が均一に分
散されない。その結果、従来の白色スペーサーであれ
ば、スペーサーが存在する部分としない部分とにスペー
サーからの光漏れの偏りが発生し表示品位が劣ることに
なる。すなわち、この光漏れ現象は、液晶が光を偏光さ
せるのに対しスペーサーにはその働きがないことから生
じる。例えば、2個分の画素を示す図8のように、液晶
パネルに電圧を印加し画素9内を黒色表示した場合、ス
ペーサー11は電圧を印加しても変化しないので、スペ
ーサー11から光が漏れてしまいスペーサー11が白く
目立ってしまうのである。
に分散されていれば実用上余り影響はないが、従来のよ
うに不均一であれば表示品位が低下してしまう。
の発生を防止するには、滴下数を多くし滴下点の間隔を
非常に小さくすればよいのであるが、多数滴下するには
時間がかかり、また、一滴当りの滴下量が小さくなるた
め滴下量のコントロールが非常に難しいという新たな課
題が生じる。
造方法の課題を考慮し、スペーサー散布工程を削減する
と共に、表示品位の高い均一な液晶パネルを生産できる
液晶パネルの製造方法を提供することを目的とするもの
である。
された2枚の基板の少なくとも一方の基板上に、スペー
サーを混入した液晶を、2枚の基板の各々の配向処理方
向によって生ずる交差角に起因する滴下液晶の展延形状
に応じて滴下間隔を変えて、滴下した後、2枚の基板を
対向して重ね合わせ、その後封止材を硬化する液晶パネ
ルの製造方法である。
一方の基板上に、スペーサーを混入した液晶を六方対称
を持った形状に滴下した後、2枚の基板を対向して重ね
合わせ、その後封止材を硬化する液晶パネルの製造方法
である。
一方の基板上に、着色スペーサーを混入した液晶を滴下
した後、2枚の基板を対向して重ね合わせ、その後封止
材を硬化する液晶パネルの製造方法である。
対向基板の各々の配向処理方向によって生ずる交差角に
起因する滴下液晶の展延形状に応じて滴下間隔を変化さ
せる、あるいは液晶の滴下形状を六方対称を持った形状
にすることで、スペーサーの分散具合いの偏りが改善さ
れ、パネル内にスペーサーを均一に分散させることがで
きる。従って、スペーサーの光漏れの偏りが大幅に改善
され表示品位が向上する。
た場合でも着色されたスペーサーを使用することによっ
て、スペーサーの光漏れ現象を防止し液晶パネルの表示
品位をより向上させることができる。
方法について図面を用いて説明する。
に、透明電極(図中省略)が形成されている2枚のガラ
ス基板1a、1bの透明電極上に配向膜2としてポリイ
ミド樹脂を形成し、その表面にラビング処理を各々施
す。ラビング方向4a、4bは、図1(c)のように2
枚の基板を貼り合わせたとき交差角の小さい方が60゜
になるようにする。
に紫外線硬化型樹脂を用いた封止材3を形成する。
ーを、液晶に対し0.3wt%混入した液晶5を、他方の
ガラス基板1bに、図1(d)のように、ラビング方向
の合成方向Aの滴下間隔6を8.0mmにし、また合成方
向Bの滴下間隔7を7.5mmに設定して格子状に滴下す
る。その滴下間隔は、対向するガラス基板1a、1bの
各々の配向処理方向によって生ずる交差角に起因する滴
下液晶の展延形状の縦横比に応じたものである。
圧下で貼り合わせ、前記封止材3に紫外線を照射して硬
化し、液晶パネルとする。
を単純格子状に滴下した場合、上述した図7のように、
液晶が楕円状に広がると共にスペーサーも楕円状に移動
し、合成方向Bにスペーサーの存在しない部分ができる
ためスペーサーの分散具合いに偏りが生じ、表示品位が
低下していた。しかし、本実施例により作製した液晶パ
ネルでは、上述のように、合成方向Bの滴下間隔を予め
狭くして滴下しているため、図1(e)のようにスペー
サー11の分散具合いが改善され、スペーサー11がほ
ぼ均一にパネル内に分散する。その結果、従来より表示
品位の向上した液晶パネルが得られる。
Bの滴下間隔7については、本実施例に限るものではな
く、液晶の展延状態は対向基板の各々の配向処理方向に
よって生ずる交差角に応じて変化するため、配向処理条
件、滴下液晶量などにより適切に設定することが望まし
い。
ては説明を省く。
ス基板1bに、スペーサーとして球径6.0μmの白色
樹脂スペーサー11を液晶に対し0.3wt%混入した液
晶5を、図2(a)のように六方対称を持った形状に滴
下する。本実施例では、隣接する滴下点の間隔14、1
5、16を7.0mmとする。その後、実施例1と同様に
基板を貼り合わせ液晶パネルとする。
ネルにおいても、図2(b)のようにスペーサー11が
従来に比べ均一にパネル内に分散し、表示品位が大幅に
改善された。
板の各々の配向処理方向によって生ずる交差角に起因す
る滴下液晶の展延形状の縦横比に応じて滴下間隔を変え
て滴下すれば、その効果は単なる六方対称を持った形状
に滴下する場合より一層向上する。
ては説明を省く。
に、スペーサーとして黒色に着色された球径6.0μm
の樹脂スペーサーを液晶中に0.3wt%混入して、図5
のような単純格子状(合成方向Aの滴下間隔6、合成方
向Bの滴下間隔7を各々8.0mmにする。)に滴下した
後、実施例1と同様に基板を貼り合わせ液晶パネルとす
る。
のを使用してパネルを作製した場合はスペーサーが均一
に分散していないと表示品位は低下していた。しかし、
本実施例により作製した液晶パネルにおいては、図3
(2個分の画素を示す。)のように黒色スペーサー8を
使用しているため、画素9を黒表示してもスペーサ8か
らの光漏れがなく、表示品位は大幅に向上する。
るものではなく、スペーサーが目立ちにくい色であれ
ば、例えば濃紺色、焦茶色などであっても同様の効果が
得られる。
は、上記実施例1では、展延形状の縦横比に応じて変え
ているが、これに限らず、展延形状に応じて変えられる
もので有りさえすれば良い。
請求項1の本発明によれば、スペーサーを混入した液晶
を、2枚の基板の各々の配向処理方向によって生ずる交
差角に起因する滴下液晶の展延形状に応じて滴下間隔を
変えるので、滴下するスペーサーがパネル内により均一
に分散され、表示品位の高い均一な液晶パネルを生産で
きる。
サの混入した液晶を六方対称を持った形状に滴下するの
で、滴下するスペーサーがパネル内により均一に分散さ
れ、表示品位の高い均一な液晶パネルを生産できる。
サーを着色することにより、スペーサーの光漏れ現象の
発生を防止し、液晶パネルの表示品位を従来より向上さ
せることができる。
となくスペーサー散布工程を削減でき、液晶パネルの製
造コストを大幅に改善できるものである。
程の説明図である。
滴下パターン図である。(b)はその実施例における液
晶展延状態及びスペーサーの分散状態を示す平面図であ
る。
用した場合の電圧印加状態でのスペーサー光漏れ現象を
説明するための2個の画素の図である。
及びスペーサーの分散状態を示す平面図である。
圧印加状態でのスペーサー光漏れ現象を説明するための
2個の画素の図である。
Claims (4)
- 【請求項1】 配向処理が施された2枚の基板の少なく
とも一方の基板上に、スペーサーを混入した液晶を、前
記2枚の基板の各々の配向処理方向によって生ずる交差
角に起因する滴下液晶の展延形状に応じて滴下間隔を変
えて、滴下した後、前記2枚の基板を対向して重ね合わ
せ、その後封止材を硬化することを特徴とする液晶パネ
ルの製造方法。 - 【請求項2】 滴下間隔は、前記滴下液晶の展延形状の
縦横比に応じて変化させられることを特徴とする請求項
1記載の液晶パネルの製造方法。 - 【請求項3】 2枚の基板の少なくとも一方の基板上
に、スペーサーを混入した液晶を六方対称を持った形状
に滴下した後、前記2枚の基板を対向して重ね合わせ、
その後封止材を硬化することを特徴とする液晶パネルの
製造方法。 - 【請求項4】 2枚の基板の少なくとも一方の基板上
に、着色スペーサーを混入した液晶を滴下した後、前記
2枚の基板を対向して重ね合わせ、その後封止材を硬化
することを特徴とする液晶パネルの製造方法。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4078133A JP2939384B2 (ja) | 1992-04-01 | 1992-04-01 | 液晶パネルの製造方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4078133A JP2939384B2 (ja) | 1992-04-01 | 1992-04-01 | 液晶パネルの製造方法 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH05281557A true JPH05281557A (ja) | 1993-10-29 |
JP2939384B2 JP2939384B2 (ja) | 1999-08-25 |
Family
ID=13653385
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4078133A Expired - Fee Related JP2939384B2 (ja) | 1992-04-01 | 1992-04-01 | 液晶パネルの製造方法 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2939384B2 (ja) |
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JP2939384B2 (ja) | 1999-08-25 |
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