JPS62206525A - Liquid crystal cell - Google Patents
Liquid crystal cellInfo
- Publication number
- JPS62206525A JPS62206525A JP4935286A JP4935286A JPS62206525A JP S62206525 A JPS62206525 A JP S62206525A JP 4935286 A JP4935286 A JP 4935286A JP 4935286 A JP4935286 A JP 4935286A JP S62206525 A JPS62206525 A JP S62206525A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- liquid crystals
- cell
- groove
- pouring port
- 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 109
- 210000002858 crystal cell Anatomy 0.000 title claims abstract description 30
- 238000002347 injection Methods 0.000 claims description 30
- 239000007924 injection Substances 0.000 claims description 30
- 239000000758 substrate Substances 0.000 claims description 26
- 239000003566 sealing material Substances 0.000 claims description 16
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 210000004027 cell Anatomy 0.000 abstract description 19
- 239000004990 Smectic liquid crystal Substances 0.000 abstract description 4
- 238000007789 sealing Methods 0.000 abstract description 3
- 238000001179 sorption measurement Methods 0.000 abstract description 3
- 238000000926 separation method Methods 0.000 abstract description 2
- 238000007599 discharging Methods 0.000 abstract 1
- 230000006837 decompression Effects 0.000 description 6
- 239000011521 glass Substances 0.000 description 6
- 238000003860 storage Methods 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 230000004313 glare Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
「技術分野」
本発明は、液晶表示素子等に用いられる液晶セルに関す
る。DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a liquid crystal cell used in a liquid crystal display element and the like.
「従来技術およびその問題点」
例えば液晶表示素子は、内面に透明電極、配向膜等を形
成した一対の基板を対向配置させ、必要に応してスペー
サ等を介在させ、周縁部をシール材でＷｉ着シールして
液晶セルを構成し、この液晶セル内に各種液晶を注入し
、密封することにより形成されている。そして、一対の
基板に形成された透明電極間に電圧を印加して、その部
分の液晶の配向を変えることにより、文字、図形、その
他任意の図柄等を表示するようにしている６従来、液晶
セル内に液晶を注入する方法としでは、いわゆる真空注
入法が主に採用されている。"Prior art and its problems" For example, in a liquid crystal display element, a pair of substrates with transparent electrodes, alignment films, etc. formed on their inner surfaces are placed facing each other, spacers etc. are interposed as necessary, and the periphery is covered with a sealing material. The liquid crystal cell is formed by sealing the liquid crystal cell, injecting various liquid crystals into the liquid crystal cell, and sealing the liquid crystal cell. By applying a voltage between transparent electrodes formed on a pair of substrates and changing the orientation of the liquid crystal in that area, characters, figures, and other arbitrary designs are displayed.6 Conventionally, liquid crystal The so-called vacuum injection method is mainly used to inject liquid crystal into cells.
すなわち、第５図に示すように、一対の基板１．２そ所
定のギャップを設けて対向配置させ、それらの周縁部を
シール材３で接合すると共に、シール材３の一部を開口
させて液晶の注入口５を形成して液晶セルを構成する。That is, as shown in FIG. 5, a pair of substrates 1.2 are placed facing each other with a predetermined gap therebetween, their peripheral edges are joined with a sealing material 3, and a portion of the sealing material 3 is opened. A liquid crystal injection port 5 is formed to constitute a liquid crystal cell.
この液晶セルを減圧室８内に導入し、注入口５からセル
内部４の空気を抜き出し、その状態で注入口５を液晶の
槽６に浸漬させ、減圧室８内の減圧を解除して大気圧に
より液晶７を注入口５からセル内部４に注入させる方法
である。This liquid crystal cell is introduced into the decompression chamber 8, the air inside the cell 4 is extracted from the inlet 5, the inlet 5 is immersed in the liquid crystal tank 6, and the reduced pressure in the decompression chamber 8 is released. This is a method in which the liquid crystal 7 is injected into the cell interior 4 from the injection port 5 using atmospheric pressure.
しかしなから、上記の液晶セルにおいでは、例えば高速
応答眩のあるスメクティック液晶を用いた大面積の液晶
表示素子を製造する場合、セルキャップが約２ ｕｍと
極めて薄いため、注入された液晶の各成分の基板表面へ
の吸着力の差によりセル内に入っていく速度か異なり、
いわゆるクロマト現象を生じて液晶の各成分か分離しで
しまうことかあった。この現象は注入口に対して遠い距
離にある液晶充填部に顕著にあられれ、液晶表示素子を
駆動した際に、液晶分子の配向に乱れが生したつ、動作
特性か劣化したつしで、表示品位が著しく悪くなるとい
う問題点があった。However, in the above-mentioned liquid crystal cell, when manufacturing a large-area liquid crystal display element using, for example, a smectic liquid crystal with high-speed response and glare, the cell cap is extremely thin at about 2 um, so each of the injected liquid crystals is The speed at which the components enter the cell varies depending on the adsorption force of the component to the substrate surface.
In some cases, a so-called chromatographic phenomenon occurred, causing the components of the liquid crystal to separate. This phenomenon is noticeable in the liquid crystal filling part located far away from the injection port, and when the liquid crystal display element is driven, the alignment of the liquid crystal molecules is disturbed and the operating characteristics are deteriorated. There was a problem that the display quality deteriorated significantly.
「発明の目的Ｊ
本発明の目的は、上記従来技術の問題点に鑑み、液晶の
注入の際、クロマト現象による液晶成分の分離を防止で
きるようにした液晶セルを提供することにある。OBJECT OF THE INVENTION J In view of the problems of the prior art described above, an object of the present invention is to provide a liquid crystal cell that can prevent separation of liquid crystal components due to chromatographic phenomena when liquid crystal is injected.
「発明の構成」
本発明による液晶セルは、一対の基板を対向配言させ、
それらの周縁部をシール材で接着シールし、シール材の
一部を開口させて液晶の注入口を設けでなり、前記基板
の少なくとも一方の内面に、前記シール材の内側であっ
て前記注入口と対向する部分に位置させて、液晶貯留用
の凹部を形成したことを特徴とする。"Structure of the Invention" The liquid crystal cell according to the present invention has a pair of substrates facing each other,
The peripheral edges thereof are adhesively sealed with a sealing material, a part of the sealing material is opened to provide an injection port for liquid crystal, and the injection port is provided on the inner surface of at least one of the substrates, and the injection port is located inside the sealing material. The invention is characterized in that a recessed portion for storing liquid crystal is formed in a portion facing the liquid crystal.
前述したように、液晶注入の際、液晶はセルの奥へ移動
するにつれてクロマト現象により成分の分ｍを生じるか
、本発明では、注入口と対向する部分に液晶貯留用の凹
部を形成したので、分離した液晶は液晶貯留用の凹部に
入り、表示部には分離した液晶が存在しなくなる。この
ため、表示品位に優れた液晶表示素子を歩留り良く製造
することができる。なお、上記凹部は表示駆動を妨げな
い位置に設けることが必要である。As mentioned above, when liquid crystal is injected, as the liquid crystal moves deeper into the cell, a component m is generated due to the chromatographic phenomenon. The separated liquid crystal enters the liquid crystal storage recess, and the separated liquid crystal no longer exists in the display section. Therefore, a liquid crystal display element with excellent display quality can be manufactured with high yield. Note that the recessed portion needs to be provided at a position that does not interfere with display driving.
本発明の好ましい態様によれば、前記凹部は溝とされる
。溝とすることにより、表示駆動を妨げない位置に形成
しやすくなり、かつ、分離した液晶を効果的に吸収させ
ることができる。なお、溝は、ダイサー等の切削装置に
より、連続あるいは断続して上下基板の少なくとも一方
の内面に形成すればよい。According to a preferred embodiment of the invention, the recess is a groove. By forming the groove, it is easy to form the groove at a position that does not interfere with display driving, and the separated liquid crystal can be effectively absorbed. Note that the grooves may be formed continuously or intermittently on the inner surface of at least one of the upper and lower substrates using a cutting device such as a dicer.
「発明の実施例」
第１図には、本発明による液晶セルの一実施例が示され
でいる。"Embodiment of the Invention" FIG. 1 shows an embodiment of a liquid crystal cell according to the present invention.
この液晶セルでは、一対のガラス基板１．２の内面にそ
れぞれＩＴＯ膜からなる透明電極がパターン形成され、
その上に配向膜がそれぞれ形成されてラビング・処理さ
れでいる。そして、一方のガラス基板２の内面には、液
晶貯留用の溝９が予め形成されている。この溝９は、ダ
イサー（商品名ｒ ＤＡＤ−２Ｈ１５Ｊ、（株） ＤＩ
ＳＣＯ製）を用いで幅３００ ｕｍ 、深さ２００ｕｍ
に切削加工しで形成されでいる。このガラス基板１．２
が透明電極を内側にして対向配冒され、スペーサ（商品
名「エポスターＧＰ２５Ｊ 、日本触媒化学工業（株）
製）を介在させて、エポキシ樹脂からなるシール材３に
より貼り合わせられ、加熱により接着固定されでいる。In this liquid crystal cell, transparent electrodes each made of an ITO film are patterned on the inner surfaces of a pair of glass substrates 1.2.
An alignment film is formed thereon and rubbed and treated. A groove 9 for storing liquid crystal is formed in advance on the inner surface of one of the glass substrates 2. This groove 9 is made using a dicer (product name: DAD-2H15J, manufactured by DI Co., Ltd.).
(made by SCO), width 300 um, depth 200 um
It is formed by cutting. This glass substrate 1.2
are arranged facing each other with the transparent electrode inside, and a spacer (product name "Epostor GP25J", manufactured by Nippon Shokubai Chemical Co., Ltd.)
They are bonded together using a sealing material 3 made of epoxy resin, with a sealant (manufactured by Manufacturer, Inc.) interposed therebetween, and are bonded and fixed by heating.
シール材３は、ガラス基板１．２の接合部の周縁部に沿
って設けられでおり、その一部が開口されて液晶の注入
口５が形成されている。そして、前記溝９は、シール材
３の内側であって注入口５と対向する部分に形成されて
いる。なお、ガラス基板１．２のセルキャップは約２
ｕｍとされている。The sealing material 3 is provided along the peripheral edge of the joint of the glass substrates 1.2, and a portion thereof is opened to form a liquid crystal injection port 5. The groove 9 is formed inside the sealing material 3 at a portion facing the injection port 5. In addition, the cell cap of glass substrate 1.2 is approximately 2
It is said to be um.
この液晶セルを減圧室８内に導入し、注入口５がら空気
を抜き出しでセル内４を（よ１．Ｕ真空状態とする。そ
して、スメクティック液晶７ （商品名ｒＣ３−１０１
１Ｊ 、チッソ（株）製）が貯留された槽６中に、注入
口５か形成された部分を下にして浸漬させる。この状態
で、減圧ｖ８内に窒素ガス等を導入して減圧を解除する
と、液晶７が注入口５からセル内部４に浸入し、セル内
部４を図中矢印１０で示す如く上昇する。液晶７がセル
内部４の ′奥まで達すると液晶７は溝９内に充填され
る。したがっで、浸入に伴ないクロマト現象により分離
した液晶７はほとんどか溝９内に入り、表示部には分離
していない液晶７たけとなる。そして、液晶７の充填が
終了したら、注入口５を封止することにより、液晶表示
素子を得ることができる。こうしで得られた液晶表示素
子に電圧を印加しで駆動したところ、表示部の全面に亙
って優れた表示品位を有する高速応答の表示かなされた
。This liquid crystal cell is introduced into the decompression chamber 8, and the air is extracted from the inlet 5 to bring the cell 4 into a vacuum state.
1J (manufactured by Chisso Co., Ltd.) is stored in a tank 6 with the part where the injection port 5 is formed facing down. In this state, when nitrogen gas or the like is introduced into the reduced pressure v8 to release the reduced pressure, the liquid crystal 7 enters the cell interior 4 through the injection port 5 and rises in the cell interior 4 as shown by the arrow 10 in the figure. When the liquid crystal 7 reaches the innermost part of the cell 4, the groove 9 is filled with the liquid crystal 7. Therefore, most of the liquid crystal 7 separated due to the chromatographic phenomenon accompanying the infiltration enters the groove 9, leaving only the unseparated liquid crystal 7 in the display area. After filling the liquid crystal 7, the injection port 5 is sealed to obtain a liquid crystal display element. When the liquid crystal display element thus obtained was driven by applying a voltage, a high-speed response display with excellent display quality was achieved over the entire display area.
第２図には、本発明による液晶セルの他の実施例か示さ
れている。FIG. 2 shows another embodiment of a liquid crystal cell according to the invention.
この実施例では、液晶注入口５か基板１．２の角部に設
けられでいる。そして、一方の基板２の内面には、シー
ル材３の内側であって注入口５に対向する部分に、角部
に沿ってし字形をなす液晶貯留用の溝９か形成されてい
る。なお、この液晶セルは、マトリクス型の電極を有し
、基板１．２の端縁部１ａ、２ａにそれぞれの端子部が
形成されており、このため基板１．２は十字状に交差し
でいる。その他の構成は、第１図に示した実施例と同様
である。In this embodiment, the liquid crystal inlet 5 is provided at a corner of the substrate 1.2. On the inner surface of one of the substrates 2, a groove 9 for liquid crystal storage is formed along a corner in a portion that is inside the sealing material 3 and faces the injection port 5. Note that this liquid crystal cell has matrix-type electrodes, and terminal portions are formed on the edge portions 1a and 2a of the substrate 1.2, so that the substrate 1.2 does not intersect in a cross shape. There is. Other configurations are similar to the embodiment shown in FIG.
この液晶セルを減圧室８に導入し、注入口５から内部の
空気を抜き出した復、第５図に示すように、注入口５が
形成された部分を下にして液晶の槽６中に浸漬させる。After introducing this liquid crystal cell into the decompression chamber 8 and extracting the air inside from the injection port 5, it is immersed in a liquid crystal tank 6 with the part where the injection port 5 is formed facing down, as shown in FIG. let
このとき、注入口５が基板１．２の角部に形成されでい
るので、注入口５が槽６の底部に近接しやすく、槽６に
貯留する液晶の量を少なくしでも注入か可能となる。ざ
らに、基板１．２の角部を鈍角状に削り取って角取り部
１ｂ、２ｂとすれば、注入口５を槽６の底部にざらに近
接しやすくすることができる。この状態で減圧室８内に
窒素ガス等を導入して減圧を解除すると、液晶７か注入
口５から液晶の内部４に浸入する。そして、この液晶セ
ルにおいても、溝９＠設けたことにより、クロマト現象
により分離した液晶７が溝９内に充填されるので、表示
部には分離していない液晶７だけとなる。At this time, since the injection port 5 is formed at the corner of the substrate 1.2, the injection port 5 can easily approach the bottom of the tank 6, making it possible to inject even if the amount of liquid crystal stored in the tank 6 is reduced. Become. If the corners of the substrate 1.2 are roughly shaved off into obtuse angles to form the chamfered parts 1b and 2b, it is possible to make it easier for the injection port 5 to approach the bottom of the tank 6 roughly. In this state, when nitrogen gas or the like is introduced into the decompression chamber 8 to release the decompression, the liquid crystal 7 enters the interior 4 of the liquid crystal through the injection port 5. Also in this liquid crystal cell, by providing the groove 9@, the liquid crystal 7 separated by the chromatographic phenomenon is filled in the groove 9, so that only the unseparated liquid crystal 7 is left in the display section.
第３図および第４図には、本発明による液晶セルのざら
に他の実施例が示されている。3 and 4 show another embodiment of the liquid crystal cell according to the present invention.
この液晶セルにおいても、液晶注入口５か基板１．２の
角部に形成されている。そして、基板２の内面には注入
口５からシール材３の内側に沿って第３図中上方に伸び
る溝１５か形成され、基板１の内面には注入口５からシ
ール材３の内側に沿って第３図中右方向に伸びる溝１６
が形成されでいる。ざらに、基板１の内面には、シール
材３の内側であって注入口５と対向する部分に、角部に
沿って１字状をなす液晶貯留用の溝９が形成されでいる
。なお、図中、１０．１１は透明電極、１２．１３は配
向膜である。In this liquid crystal cell as well, a liquid crystal injection port 5 is formed at a corner of the substrate 1.2. A groove 15 is formed on the inner surface of the substrate 2, extending upward in FIG. 3 from the injection port 5 along the inside of the sealing material 3. Groove 16 extending to the right in Fig. 3
has been formed. Roughly speaking, on the inner surface of the substrate 1, a groove 9 for liquid crystal storage, which is in the shape of a single character, is formed along a corner on the inner side of the sealing material 3 and in a portion facing the injection port 5. In addition, in the figure, 10.11 is a transparent electrode, and 12.13 is an alignment film.
この液晶セルでは、注入口５からセル内部４に至る溝１
５．１６が形成されでいるので、液晶注入の際、液晶が
溝１５．１６ヲ通って速やかに浸入し、溝１５．１６か
ら基板１．２のより狭い間隙に浸透しでいく。このため
、スメクティック液晶などの高粘度の液晶を用い、かつ
、基板１．２の間隙が小ざい場合でも液晶の注入時間を
短くすることができる。ざらに、注入口５と対向する部
分に液晶貯留用の溝９を設けたことにより、クロマト現
象により成分が分離した液晶を溝９内に導入しで、分離
した液晶を表示部から除く効果も得られる。In this liquid crystal cell, a groove 1 extending from the injection port 5 to the cell interior 4 is
5.16 is already formed, so that when liquid crystal is injected, the liquid crystal quickly penetrates through the groove 15.16 and from the groove 15.16 into the narrower gap of the substrate 1.2. Therefore, even when a high viscosity liquid crystal such as smectic liquid crystal is used and the gap between the substrates 1 and 2 is small, the liquid crystal injection time can be shortened. Furthermore, by providing the liquid crystal storage groove 9 in the part facing the injection port 5, the liquid crystal whose components have been separated by the chromatographic phenomenon is introduced into the groove 9, and the separated liquid crystal can be removed from the display section. can get.
「発明の効果」
以上説明したように、本発明によれば、注入口と対向す
る部分に液晶貯留用の凹部を形成したので、液晶注入の
際、クロマト現象により成分が分離した液晶は、液晶貯
留用の凹部に入り、表示部から分離した液晶を除くこと
かできる。したがって、表示部の全面に亙って良好な表
示品位を有する液晶表示素子を得ることができる。そし
て、本発明は、セルギャップが小さいためにクロマト現
象を生じやすいスメクティック液晶を用いた高速応答の
液晶表示素子に特に好適である。"Effects of the Invention" As explained above, according to the present invention, since the recess for liquid crystal storage is formed in the part facing the injection port, when liquid crystal is injected, the liquid crystal whose components have been separated due to the chromatographic phenomenon is It can enter the storage recess and remove the liquid crystal separated from the display section. Therefore, a liquid crystal display element having good display quality over the entire display portion can be obtained. The present invention is particularly suitable for a high-speed response liquid crystal display element using smectic liquid crystal, which is susceptible to chromatographic phenomena due to its small cell gap.
第１図は本発明の一実施例による液晶セルの液晶注入状
態を示す正面図、第２図は本発明の他の実施例による液
晶セルの液晶注入状態を示す正面図、第３図は本発明の
ざらに他の実施例による液晶セルを示す正面図、第４図
は第３図におけるＡ−Ａ′線に沿った断面図、第５は従
来の液晶セルの液晶注入状態を示す正面図である。
図中、１．２はガラス基板、３はシール材、４は液晶セ
ル内部、５は注入口、６は液晶の槽、７は液晶、９は溝
である。FIG. 1 is a front view showing a state in which liquid crystal is injected into a liquid crystal cell according to an embodiment of the present invention, FIG. 2 is a front view showing a state in which liquid crystal is injected into a liquid crystal cell according to another embodiment of the present invention, and FIG. FIG. 4 is a front view showing a liquid crystal cell according to another embodiment of the invention; FIG. 4 is a sectional view taken along the line A-A' in FIG. 3; and FIG. 5 is a front view showing a liquid crystal injection state of a conventional liquid crystal cell. It is. In the figure, 1.2 is a glass substrate, 3 is a sealing material, 4 is the inside of a liquid crystal cell, 5 is an injection port, 6 is a liquid crystal tank, 7 is a liquid crystal, and 9 is a groove.
Claims (2)
ール材で接着シールし、シール材の一部を開口させて液
晶の注入口を設けた液晶セルにおいて、前記基板の少な
くとも一方の内面に、前記シール材の内側であって前記
注入口と対向する部分に位置させて、液晶貯留用の凹部
を形成したことを特徴とする液晶セル。(1) In a liquid crystal cell in which a pair of substrates are arranged facing each other, their peripheral edges are adhesively sealed with a sealing material, and a liquid crystal injection port is provided by opening a part of the sealing material, at least one inner surface of the substrate is provided. A liquid crystal cell characterized in that a recessed portion for storing liquid crystal is formed inside the sealing material at a portion facing the injection port.
ある液晶セル。(2) The liquid crystal cell according to claim 1, wherein the recess is a groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4935286A JPS62206525A (en) | 1986-03-06 | 1986-03-06 | Liquid crystal cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4935286A JPS62206525A (en) | 1986-03-06 | 1986-03-06 | Liquid crystal cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62206525A true JPS62206525A (en) | 1987-09-11 |
Family
ID=12828620
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4935286A Pending JPS62206525A (en) | 1986-03-06 | 1986-03-06 | Liquid crystal cell |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62206525A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0223318A (en) * | 1988-05-24 | 1990-01-25 | Thorn Emi Plc | Liquid crystal display cell and filling therefor |
-
1986
- 1986-03-06 JP JP4935286A patent/JPS62206525A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0223318A (en) * | 1988-05-24 | 1990-01-25 | Thorn Emi Plc | Liquid crystal display cell and filling therefor |
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