JPH08304832A - Liquid crystal display element - Google Patents
Liquid crystal display elementInfo
- Publication number
- JPH08304832A JPH08304832A JP14489696A JP14489696A JPH08304832A JP H08304832 A JPH08304832 A JP H08304832A JP 14489696 A JP14489696 A JP 14489696A JP 14489696 A JP14489696 A JP 14489696A JP H08304832 A JPH08304832 A JP H08304832A
- Authority
- JP
- Japan
- Prior art keywords
- spacer
- liquid crystal
- substrates
- crystal display
- 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
Landscapes
- Liquid Crystal (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はワープロ、携帯用パソコ
ン、ＴＶ等に使用される液晶表示素子に関するものであ
り、特に基板間の間隙を基板全面にわたって均一にし、
かつ低温放置に於ける気泡の発生を防ぐようにした液晶
表示素子に関する物であり、特に大型の液晶表示装置に
適している。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device used for word processors, portable personal computers, TVs, and the like.
In addition, the present invention relates to a liquid crystal display element that prevents the generation of bubbles when left at a low temperature, and is particularly suitable for a large liquid crystal display device.
【０００２】[0002]
【従来の技術】一般に液晶表示素子は、電極を形成した
一対の基板を電極面を対向させ、該基板間にスペーサー
を配設して所定の間隙とし、周辺部をシール材で保持す
ると共に間隙内に液晶を封入してなるものである。前記
液晶表示素子は、液晶層の厚みが通常５〜１５μｍ程度
であり、この間隙が均一に保持されないと表示面に色ム
ラが生じて表示品質を悪くする。この為、スペーサーが
表示品質を決める重要な役割をしている。スペーサーと
しては、繊維状剛性体スペーサー、または粒子状弾性体
スペーサーがそれぞれ単体で使用されていた。しかし、
表示面積が１０平方ｃｍ以上の大型基板を用い液晶の中
に繊維状剛性体スペーサーをいれた液晶表示素子を製造
すると、基板の間隙は略均一になるが、低温放置に於い
て気泡が発生し表示品質を非常に悪くしていた。又、前
記欠点を対策するために繊維状剛性体スペーサーの代わ
りに粒子状弾性体スペーサーを用いた液晶表示素子があ
るが、低温放置での気泡の発生はないが、基板間間隙は
前記剛性体スペーサーでの間隙よりも凹凸が大きく、表
示品質が劣るものであった。2. Description of the Related Art In general, in a liquid crystal display device, a pair of substrates on which electrodes are formed are opposed to each other on an electrode surface, a spacer is provided between the substrates to form a predetermined gap, and a peripheral portion is held by a sealing material and the gap is maintained. Liquid crystal is sealed in the inside. In the liquid crystal display element, the thickness of the liquid crystal layer is usually about 5 to 15 μm, and if this gap is not uniformly maintained, color unevenness occurs on the display surface and the display quality deteriorates. Therefore, the spacer plays an important role in determining the display quality. As the spacer, a fibrous rigid spacer or a particulate elastic spacer has been used alone. But,
When a large-sized substrate having a display area of 10 cm 2 or more is used to manufacture a liquid crystal display element in which a fibrous rigid spacer is inserted in a liquid crystal, the gap between the substrates becomes substantially uniform, but bubbles are generated when left at a low temperature. The display quality was very poor. In addition, there is a liquid crystal display element using a particulate elastic spacer instead of a fibrous rigid spacer in order to address the above-mentioned drawbacks. The unevenness was larger than the gap in the spacer, and the display quality was poor.
【０００３】さらに、特開昭５７−７０５２０号公報に
は剛体スペーサーと該剛体スペーサーより軟化点の低い
スペーサーを混合して、絶縁膜を塗布した基板に散布し
て加熱する事により、軟化点の低いスペーサーと絶縁膜
を溶融固着した事によりギャップの均一化を得た構成が
開示されている。即ち上記公報では軟化点の低いスペー
サーとしては基板材質であるガラスの耐熱温度３５０℃
以下の溶解点を有すところの溶融点約２００℃のポリマ
ースペーサーをもちい、基板上に散布した後、一対の基
板をシーリングするが、この時にポリマースペーサーが
溶融して基板上に成形された絶縁膜とポリマースペーサ
ーとの溶解固着し基板間間隙を均一にせんものとしてい
る。Further, Japanese Patent Application Laid-Open No. 57-70520 discloses that a rigid spacer and a spacer having a softening point lower than that of the rigid spacer are mixed, and the mixture is dispersed on a substrate coated with an insulating film and heated to thereby reduce the softening point. A configuration in which a gap is made uniform by melting and fixing a low spacer and an insulating film is disclosed. That is, in the above publication, the spacer having a low softening point is a heat-resistant temperature of 350 ° C. of glass as a substrate material.
Using a polymer spacer with a melting point of about 200 ° C, which has the following melting point, spraying on the substrate, and then sealing the pair of substrates. At this time, the polymer spacer is melted and the insulation formed on the substrate is melted. The film and the polymer spacer are fused and fixed to make the gap between the substrates uniform.
【０００４】[0004]
【発明が解決しようとする問題点】しかしながら前記公
報は、シール材の硬化温度約１２０℃に対してスペーサ
ー溶融温度が高温となりすぎることと、ポリマースペー
サーの溶融温度管理が難しく、加圧／加温でのシール焼
成装置が簡素化できない問題を有していた。However, the above publication discloses that the melting temperature of the spacer is too high with respect to the curing temperature of the sealing material of about 120 ° C., that the melting temperature of the polymer spacer is difficult to control, and that the pressurization / heating is difficult. Has a problem that the seal baking apparatus cannot be simplified.
【０００５】本発明の目的は上記の欠点を解決し、間隔
が均一で、そして気泡を生じない液晶表示素子を提供す
るとともにシール材の硬化温度以上の温度を加えずに液
晶表示素子を生産する事により、表示品質が向上した液
晶表示素子を提供することにある。The object of the present invention is to solve the above-mentioned drawbacks, to provide a liquid crystal display device with uniform intervals and without bubbles, and to produce a liquid crystal display device without applying a temperature higher than the curing temperature of the sealing material. The object is to provide a liquid crystal display device having improved display quality.
【０００６】[0006]
【問題を解決するための手段】本発明は、対向する一対
の基板間に液晶が封入されてなる液晶表示素子におい
て、前記基板間には、径の相違するスペーサーが介装さ
れ、大径のスペーサーは、スペーサー間の径寸法の差分
に相当する弾性変形が可能とされ、大径のスペーサーが
弾性変形したときに、両基板の間隔が小径のスペーサー
により制限されることを特徴とするものである。According to the present invention, there is provided a liquid crystal display device in which liquid crystal is sealed between a pair of opposing substrates, wherein spacers having different diameters are interposed between the substrates to form a large-diameter spacer. The spacer is capable of elastic deformation corresponding to the difference in diameter between the spacers, and when the large-diameter spacer is elastically deformed, the distance between the two substrates is limited by the small-diameter spacer. is there.
【０００７】[0007]
【作用】本発明の液晶表示素子では、基板間に径の相違
するスペーサーが介在している。低温時に液晶が収縮し
基板間隔が狭くなると、大径のスペーサーが、スペーサ
ー間の径寸法差分に相当して弾性変形し、その後は小径
のスペーサーにより、基板間隔が制限される。液晶が収
縮したときに大径スペーサーが弾性変形し、基板間隔が
狭くなることによって、液晶内の気泡の発生を防止でき
る。また、弾性変形後は、小径のスペーサーにより基板
間隔が均一になる。In the liquid crystal display device of the present invention, spacers having different diameters are interposed between the substrates. When the liquid crystal contracts at a low temperature and the space between the substrates is narrowed, the large-diameter spacers are elastically deformed corresponding to the difference in diameter between the spacers, and then the space between the substrates is limited by the small-diameter spacers. When the liquid crystal contracts, the large-diameter spacer is elastically deformed, and the distance between the substrates is reduced, so that the generation of bubbles in the liquid crystal can be prevented. Also, after elastic deformation, the spacers with a small diameter make the substrate spacing uniform.
【０００８】[0008]
【実施例】以下図面によって本発明の実施例を説明す
る。図１は、液晶中に２種類の異径のスペーサーをいれ
た本発明に於ける液晶表示素子の平面図であり、図２は
図１の断面図である。一対の透明電極膜付きの一方の基
板１に、繊維状剛性体スペーサーとしてガラスファイバ
ースペーサー４（径７μｍ±０．５μｍ、長さ２０μｍ
〜２００μｍ）と、粒子状弾性体スペーサーとして、剛
性体スペーサーより液晶の膨張係数に近い値を示す粒子
状プラスチックビーズスペーサー５（径８μｍ±０．５
μｍ）をほぼ１：１の割合で散布した。他方の基板２に
はエポキシ系シ−ル材３をスクリーン印刷し、両者の基
板を重ねあわせて、シール材３を適度の温度、約１２０
〜１５０℃で加熱焼成すると共に、１ｋｇ／平方ｃｍ程
度の圧力で加圧する。こうして得られた液晶表示基板の
基板１と基板２の間隙内に、前記基板２にシール材３の
一部を切欠いて形成されている注入孔３ａより、液晶６
を注入し封止する事により作成した液晶表示素子に於い
て、基板間間隙はほぼ均一になり、−３０℃の低温に約
４８時間放置したところ、気泡は発生しなかった。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view of a liquid crystal display device according to the present invention in which two types of spacers having different diameters are provided in a liquid crystal, and FIG. 2 is a cross-sectional view of FIG. A glass fiber spacer 4 (diameter 7 μm ± 0.5 μm, length 20 μm) as a fibrous rigid body spacer is placed on one substrate 1 having a pair of transparent electrode films.
To 200 μm) and a particulate plastic bead spacer 5 (diameter: 8 μm ± 0.5) exhibiting a value closer to the expansion coefficient of the liquid crystal than the rigid spacer as the particulate elastic spacer.
μm) was sprayed at a ratio of approximately 1: 1. The other substrate 2 is screen-printed with an epoxy-based seal material 3 and both substrates are superimposed, and the seal material 3 is heated to a suitable temperature of about 120 ° C.
Heat and sinter at ~ 150 ° C and pressurize at a pressure of about 1 kg / square cm. The liquid crystal 6 is obtained from the injection hole 3a formed by cutting out a part of the sealing material 3 in the substrate 2 in the gap between the substrate 1 and the substrate 2 of the liquid crystal display substrate thus obtained.
In the liquid crystal display element produced by injecting and sealing, the gap between the substrates was almost uniform, and no air bubbles were generated when left at a low temperature of -30 ° C. for about 48 hours.
【０００９】即ち本発明に於ける液晶表示素子は、スペ
ーサーを溶融せずに用い、基板間の間隙を剛性体スペー
サーによって規制し、又気泡の発生を前記剛性体スペー
サーより径大の弾性体スペーサーによって防止してお
り、特開昭５７−７０５２０により開示されているとこ
ろの剛体スペーサーと軟化点の低いスペーサーを混合し
て、絶縁膜を塗布した基板に散布し、軟化点の低いスペ
ーサーと絶縁膜を溶融固着した事によりギャップの均一
化を得た構成とは異なる構成を有す。That is, in the liquid crystal display device according to the present invention, the spacer is used without being melted, the gap between the substrates is regulated by the rigid spacer, and the generation of air bubbles is made of an elastic spacer having a diameter larger than that of the rigid spacer. And a spacer having a low softening point, which is disclosed in Japanese Patent Laid-Open No. 57-70520, are mixed and sprayed on a substrate coated with an insulating film to form a spacer having a low softening point and an insulating film. It has a configuration different from the configuration in which the gaps are made uniform by melting and fixing.
【００１０】[0010]
【発明の効果】以上、説明したように、本発明は液晶表
示素子の基板間間隙内に径の相違するスペーサーを入
れ、大径のスペーサーがスペーサーの径の差分に相当し
て弾性変形可能となることにより、液晶表示素子の基板
の間隙を均一にでき、特に表示面積が４００平方ｃｍ以
上もある大型液晶表示素子の間隙を均一にでき、且つ低
温放置に於ける気泡発生を防止し、液晶表示素子の歩留
まりを落とす大きな要因である気泡による画素抜けを防
止する効果を有する。As described above, according to the present invention, spacers having different diameters are inserted in the gap between the substrates of the liquid crystal display element, and the large diameter spacer is elastically deformable corresponding to the difference in the diameter of the spacers. As a result, the gaps between the substrates of the liquid crystal display element can be made uniform, and especially the gaps of a large-sized liquid crystal display element having a display area of 400 square cm or more can be made uniform, and bubbles can be prevented from being generated when left at a low temperature. This has an effect of preventing pixel omission due to air bubbles, which is a major factor that reduces the yield of display elements.
【図１】基板間間隙内に２種類の異形スペーサーをいれ
た本発明の液晶表示素子の平面図、FIG. 1 is a plan view of a liquid crystal display device of the present invention in which two types of irregular spacers are inserted in a gap between substrates.
【図２】図１の断面図、FIG. 2 is a sectional view of FIG. 1,
１，２ 電極を形成した基板 ３ シール材 ４ ガラスファイバースペーサー ５ プラスチックビーズースペーサー ６ 液晶 1, Substrate on which electrodes are formed 3 Sealing material 4 Glass fiber spacer 5 Plastic bead spacer 6 Liquid crystal
Claims (1)
てなる液晶表示素子において、前記基板間には、径の相
違するスペーサーが介装され、大径のスペーサーは、ス
ペーサー間の径寸法の差分に相当する弾性変形が可能と
され、大径のスペーサーが弾性変形したときに、両基板
の間隔が小径のスペーサーにより制限されることを特徴
とする液晶表示素子。In a liquid crystal display device in which liquid crystal is sealed between a pair of opposed substrates, spacers having different diameters are interposed between the substrates, and a large-diameter spacer has a diameter between the spacers. The liquid crystal display element is characterized in that an elastic deformation corresponding to the difference is made possible, and when the large-diameter spacer is elastically deformed, the distance between the two substrates is limited by the small-diameter spacer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14489696A JP2609087B2 (en) | 1996-05-16 | 1996-05-16 | Liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14489696A JP2609087B2 (en) | 1996-05-16 | 1996-05-16 | Liquid crystal display device |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60178139A Division JPH0750274B2 (en) | 1985-08-13 | 1985-08-13 | Liquid crystal display element |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08304832A true JPH08304832A (en) | 1996-11-22 |
| JP2609087B2 JP2609087B2 (en) | 1997-05-14 |
Family
ID=15372859
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14489696A Expired - Lifetime JP2609087B2 (en) | 1996-05-16 | 1996-05-16 | Liquid crystal display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2609087B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1255155A2 (en) * | 2001-04-30 | 2002-11-06 | AEG Gesellschaft für moderne Informationssysteme mbH | Liquid crystal display cell |
| US6762808B2 (en) | 2001-05-25 | 2004-07-13 | Aeg Gesellschaft Fur Moderne Informationsysteme Mbh | LCD-cell with color and light filtering layers |
| US7133108B2 (en) * | 2000-12-08 | 2006-11-07 | Hitachi, Ltd. | Liquid crystal display device |
-
1996
- 1996-05-16 JP JP14489696A patent/JP2609087B2/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7133108B2 (en) * | 2000-12-08 | 2006-11-07 | Hitachi, Ltd. | Liquid crystal display device |
| US7456926B2 (en) | 2000-12-08 | 2008-11-25 | Hitachi, Ltd. | Liquid crystal display device |
| US7826028B2 (en) | 2000-12-08 | 2010-11-02 | Hitachi, Ltd. | Liquid crystal display device |
| EP1255155A2 (en) * | 2001-04-30 | 2002-11-06 | AEG Gesellschaft für moderne Informationssysteme mbH | Liquid crystal display cell |
| EP1255155A3 (en) * | 2001-04-30 | 2004-04-07 | AEG Gesellschaft für moderne Informationssysteme mbH | Liquid crystal display cell |
| US6876423B2 (en) | 2001-04-30 | 2005-04-05 | Aeg Gesellschaft Fur Moderne Informationssyteme Mbh | LCD-cell including one spacer exhibiting a dimension and a material property different from another spacers dimension and material property |
| US6762808B2 (en) | 2001-05-25 | 2004-07-13 | Aeg Gesellschaft Fur Moderne Informationsysteme Mbh | LCD-cell with color and light filtering layers |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2609087B2 (en) | 1997-05-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |