JPH07128674A - Production of liquid crystal display element - Google Patents

Production of liquid crystal display element

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Publication number
JPH07128674A
JPH07128674A JP27685093A JP27685093A JPH07128674A JP H07128674 A JPH07128674 A JP H07128674A JP 27685093 A JP27685093 A JP 27685093A JP 27685093 A JP27685093 A JP 27685093A JP H07128674 A JPH07128674 A JP H07128674A
Authority
JP
Grant status
Application
Patent type
Prior art keywords
liquid crystal
vacuum
substrate
crystal display
ions
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
Application number
JP27685093A
Other languages
Japanese (ja)
Inventor
Shingo Fujita
Kiyoko Nakao
Yoshiyuki Okazaki
Satoru Shinsenji
喜代子 中尾
禎之 岡崎
哲 秦泉寺
晋吾 藤田
Original Assignee
Matsushita Electric Ind Co Ltd
松下電器産業株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date

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Classifications

    • GPHYSICS
    • G02OPTICS
    • G02FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00Devices 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
    • G02F1/01Devices 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
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1339Gaskets; Spacers, also spacers with conducting properties; Sealing of the cell
    • GPHYSICS
    • G02OPTICS
    • G02FDEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING, GATING, MODULATING OR DEMODULATING; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; FREQUENCY-CHANGING; NON-LINEAR OPTICS; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00Devices 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
    • G02F1/01Devices 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
    • G02F1/13Devices 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
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1341Filling or closing of the cell
    • G02F2001/13415Drop filling process

Abstract

PURPOSE: To prevent the mixing of impurity ions into a liquid crystal and to eliminate impurity ions by a simple method and to decrease traces of drops, irregular threshold and uneven injection.
CONSTITUTION: Just before a liquid crystal 11 is dropped on the surface of a substrate 7 the periphery of which is surrounded with a sealing material 10, ions are trapped with an ion trapper 3 so as to drop the liquid crystal 11 containing little impurity ions. Then substrates facing to each other are laminated in vacuum. Alternatively, a vacant liquid crystal cell prepared by sticking the peripheral of substrates with a sealing material. Just before the injection port of the vacant liquid crystal cell is dipped in a liquid crystal in vacuum, ions are trapped so as to directly dip the injection port of the vacant cell in the liquid crystal. Then the gas pressure is returned to atmospheric pressure to perform vacuum injection.
COPYRIGHT: (C)1995,JPO

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【産業上の利用分野】本発明は、液晶中への不純物イオンの混入を防止し表示品位の高い液晶表示素子の製造方法に関するものである。 The present invention relates to a method of manufacturing a high liquid crystal display device display quality by preventing the contamination of impurity ions into the liquid crystal in.

【0002】 [0002]

【従来の技術】以下に、従来の液晶表示素子の液晶充填方法について図面を用いて説明する。 BACKGROUND OF THE INVENTION Hereinafter, will be explained with reference to the drawings crystal filling method of a conventional liquid crystal display device.

【0003】液晶表示素子の相対向する基板間に液晶を充填する方法としては大きく真空注入法と滴下工法の2 [0003] large vacuum injection method and a dropping method is a method of filling a liquid crystal between the substrates facing each other of the liquid crystal display element 2
つに分けられる。 One to be divided.

【0004】図3は真空注入法に属する液晶注入製造システム構成の断面図であり、図3に示すようにシール材 [0004] Figure 3 is a cross-sectional view of a liquid crystal injection manufacturing system configuration belonging to the vacuum injection method, the sealing member as shown in FIG. 3
10に入口の開いた液晶空セル8と液晶11を入れたプール 10 to the pool to get the liquid crystal empty cell 8 and the liquid crystal 11, which open the inlet
13を密閉容器9内に投入する。 13 charged into the closed vessel 9. 真空ポンプ1で密閉容器9内を減圧した後、液晶空セル8の入口部分をプール13 After reducing the pressure of the closed vessel 9 in the vacuum pump 1, the inlet portion of the liquid crystal empty cell 8 Pool 13
に浸す。 Soak in. しかる後、密閉容器9内を大気圧に戻すことにより、空セル内との気圧差によってセル内に液晶を注入し、注入口を封口樹脂で封口硬化するものであった。 Thereafter, by returning the inside of the sealed vessel 9 to the atmospheric pressure, a liquid crystal is injected into the cell by air pressure difference between an empty cell, the inlet was to cure sealed with sealing resin.

【0005】また滴下工法としては、例えば特開昭61− [0005] The dropping process, for example, JP 61-
55625号公報に開示されているように、基板表面にシール材を印刷形成した後、ディスペンサを用いて等間隔に液晶を基板に滴下する。 As disclosed in 55625 JP, after a sealing material formed by printing on the substrate surface, liquid crystal is dropped on the substrate at regular intervals using a dispenser. その後、減圧下で相対する基板を徐々に貼り合せ、シール材を硬化する。 Then, gradually bonded opposing substrate under reduced pressure, to cure the sealant.

【0006】さらに、近年、液晶中に混入する不純物イオンにより液晶表示素子の表示均一性が低下することがわかり、特開平2−304522号公報や特開平2−304523号公報に開示されているように、液晶を入れたプールの中にイオン交換樹脂を入れたり、イオン交換樹脂を含ませた海綿体を用いて液晶を注入する等の検討が行われている。 Furthermore, in recent years, see that the display uniformity of a liquid crystal display device is reduced by impurity ions mixed in the liquid crystal, as disclosed in JP-A-2-304522 and JP 2-304523 to, or placed in an ion exchange resin in a pool filled with liquid, the study of the liquid crystal is injected using a sponge body impregnated with an ion exchange resin have been made.

【0007】 [0007]

【発明が解決しようとする課題】しかしながら上記方法では、補充液晶やイオン交換樹脂を混合した液晶またはイオン交換樹脂と液晶を含ませた海綿体に外気からの不純物イオンが混入する等の原因で、不純物イオンを含んだ液晶が滴下されたり注入口付近から不純物イオンが侵入する等が起こり、急峻性の高いSTN型液晶では印加電圧によるしきい値が不純物イオンの影響により変化し、滴下跡,しきい値むら,注入むら等が生じた。 In however the method [0005], because of such impurity ions from the ambient air to replenish the liquid crystal and an ion-exchange liquid resin mixed with or ion exchange resin and sponge body impregnated with the liquid crystal is mixed, occur such as a liquid crystal containing impurity ions penetrate impurity ions from or dropped inlet near, varies due to the influence threshold by applied voltage of the impurity ions at a high steepness STN type liquid crystal, drop mark, teeth threshold irregularities, injection unevenness or the like occurs.

【0008】本発明は、それらの問題点に注目し、簡単な製造方法で液晶中への不純物イオンの混入防止と排除を行い、滴下跡,しきい値むら,注入むらの低減を目的とする。 [0008] The present invention focuses on these problems, it performs mixing prevention and elimination of impurity ions into the liquid crystal in a simple manufacturing process, an object drop mark, the threshold unevenness, the reduction in the injection irregularity .

【0009】 [0009]

【課題を解決するための手段】本発明は上記目的を達成するため、周辺をシール材で囲まれた基板表面に液晶を滴下する直前にイオントラップを行い、不純物イオンの少ない液晶を滴下した後、真空中で相対向する基板を貼り合わせるようにするか、または基板の周囲をシールで貼り合わされた液晶空セルを、真空中で注入口に液晶を浸す直前にイオントラップを行い、不純物イオンの少ない液晶を空セル注入口に直接浸し大気圧に戻して真空注入を行うようにしたものである。 Since SUMMARY OF THE INVENTION The present invention to achieve the above object, ions trapped just prior to dropping the liquid crystal on the substrate surface Surrounded by the sealing material, was added dropwise little impurity ions LCD , or to bond the substrate facing each other in a vacuum, or a liquid crystal empty cells bonded around a sealing substrate, by ion trap immediately before immersing the liquid crystal injection port in a vacuum, impurity ions immersed directly fewer crystal empty cell inlet returned to atmospheric pressure is obtained to perform the vacuum injection.

【0010】 [0010]

【作用】本発明によれば、液晶を外気から遮断することにより大気中からの不純物イオンの混入を防止すると共に、基板表面もしくは液晶空セルへ液晶を供給する直前にイオントラップすることにより、不純物イオンの少ない液晶表示素子を提供できる。 According to the present invention, it is possible to prevent the contamination of impurity ions from the atmosphere by blocking the liquid from the outside air, by ion trap immediately before supplying the liquid to the substrate surface or a liquid crystal empty cell, impurities possible to provide a small liquid crystal display device of ions.

【0011】 [0011]

【実施例】 【Example】

(実施例1)図1は本発明の第1の実施例における液晶表示素子の製造システム構成の断面図である。 (Example 1) FIG. 1 is a sectional view of a manufacturing system configuration of a liquid crystal display device according to a first embodiment of the present invention. これは液晶滴下工法に属するものであり、図1の液晶容器2に液晶 This is belongs to the liquid crystal dropping process, the liquid crystal in the liquid crystal container 2 of Figure 1
11を入れ蓋をする。 11 were put to the lid. 液晶容器2からイオントラッパ3の上部に液晶11が流れ込み、イオントラッパ3の上部に溜った液晶11は、イオントラッパ3によりイオントラップされイオントラッパ3の下部に溜る。 LCD 11 flows from the liquid crystal container 2 on the top of the ion trapper 3, a liquid crystal 11 collected in the upper portion of the ion trapper 3 is the ion trap by the ion trapper 3 collects in the bottom of the ion trapper 3. ここでディスペンサ5にキャップ14をした後、コック4を開きディスペンサ5のシリンダー6でイオントラップされた液晶12を吸い上げる。 Here after the cap 14 to the dispenser 5, sucks the liquid crystal 12 which is an ion trap at a cylinder 6 of the dispenser 5 to open the cock 4. 再びコック4を閉じ、ディスペンサ5のキャップ14を外し、ディスペンサ5を用いて周囲をシール材 Close the stopcock. 4 again, remove the cap 14 of the dispenser 5, a sealing material around with a dispenser 5
10で囲まれ配向処理を施した透明電極付きガラス基板7 With the transparent electrode subjected to orientation treatment surrounded by 10 glass substrate 7
に液晶を滴下した後、真空中で同じく配向処理を施した透明電極付きでスペーサーを散布した基板と貼合わせシール材10を硬化して液晶表示素子を作成する。 Creating after dropping a liquid crystal, a liquid crystal display element by curing a substrate and laminating the sealing material 10 was sprayed spacers in the transparent electrodes having similarly subjected to orientation treatment in a vacuum.

【0012】次に、こうして作成した液晶表示素子の評価を行ったところ、イオントラッパを介していない従来の製造方法に比べ表示品位の高い液晶表示素子であった。 [0012] Next, in this way were evaluated in the liquid crystal display element that was created, was a high liquid crystal display element of the display quality compared to the conventional manufacturing method that is not through the ion trapper.

【0013】(実施例2)図2は本発明の第2の実施例による液晶表示素子の製造システム構成の断面図である。 [0013] (Embodiment 2) FIG. 2 is a sectional view of a manufacturing system configuration of a liquid crystal display device according to a second embodiment of the present invention.
これは液晶真空注入法に属するものであり、図2の液晶容器2に液晶11を入れ蓋をする。 This is belongs to the liquid crystal vacuum injection method, the lid get the liquid crystal 11 in the liquid crystal container 2 of Figure 2. 液晶容器2からイオントラッパ3の上部に液晶11が流れ込み、イオントラッパ3の上部に溜った液晶11は、イオントラッパ3によりイオントラップされイオントラッパ3の下部に溜る。 LCD 11 flows from the liquid crystal container 2 on the top of the ion trapper 3, a liquid crystal 11 collected in the upper portion of the ion trapper 3 is the ion trap by the ion trapper 3 collects in the bottom of the ion trapper 3.
ディスペンサ5と液晶空セル8を密閉容器9に入れ、この密閉容器9内を真空ポンプ1で減圧する。 Put dispenser 5 and a liquid crystal empty cell 8 in a closed container 9, depressurizing the closed container 9 by a vacuum pump 1. ディスペンサ5にキャップ14をした後でコック4を開き、ディスペンサ5のシリンダ6でイオントラップされた液晶12を吸い上げる。 Open the cock 4 after the cap 14 to the dispenser 5, sucks the liquid crystal 12 which is an ion trap cylinder 6 of the dispenser 5. 再びコック4を閉じ、ディスペンサのキャップ14を外し、液晶空セル8の液晶注入口とディスペンサ5の先端を接続してイオントラップされた液晶12で浸す。 Closed again cock 4, remove the cap 14 of the dispenser, by connecting the tip of the liquid crystal inlet and dispenser 5 of the liquid crystal empty cell 8 immersed in the liquid crystal 12 which is an ion trap. その後、密閉容器9内を大気圧に戻し注入口を封口硬化して液晶表示素子を作成する。 Thereafter, the closed vessel 9 inlet cured sealing returned to atmospheric pressure to create a liquid crystal display device.

【0014】次に、こうして作成した液晶表示素子の評価を行ったところ、イオントラッパを介していない従来の製造方法に比べ表示品位の高い液晶表示素子であった。 [0014] Next, in this way were evaluated in the liquid crystal display element that was created, was a high liquid crystal display element of the display quality compared to the conventional manufacturing method that is not through the ion trapper.

【0015】 [0015]

【発明の効果】以上説明したように、本発明は液晶を外気から遮断さらにイオントラップ直後の液晶を空セル内に充填することにより、大気中からの不純物イオン混入を防止および排除することができ、滴下跡,しきい値むら,注入むらの少ない液晶表示素子を製造できる。 As described in the foregoing, the present invention is by filling liquid crystal immediately after blocking further ion trap liquid from the outside air into the air cell, it is possible to prevent and eliminate impurities ions contamination from the atmosphere , it can be prepared drop mark, the threshold unevenness, less liquid crystal display device of injection irregularity.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】本発明の第1の実施例における液晶表示素子の製造システム構成の断面図である。 1 is a cross-sectional view of a manufacturing system configuration of the liquid crystal display device according to a first embodiment of the present invention.

【図2】本発明の第2の実施例における液晶表示素子の製造システム構成の断面図である。 2 is a cross-sectional view of a manufacturing system configuration of the liquid crystal display device according to a second embodiment of the present invention.

【図3】従来の真空注入法に属する液晶注入製造システム構成の断面図である。 3 is a cross-sectional view of a liquid crystal injection manufacturing system configuration belonging to the conventional vacuum injection method.

【符号の説明】 DESCRIPTION OF SYMBOLS

1…真空ポンプ、 2…液晶容器、 3…イオントラッパ、 4…コック、 5…ディスペンサ、 6…シリンダ、 7…基板、 8…液晶空セル、 9…密閉容器、 1 ... vacuum pump, 2 ... liquid crystal container, 3 ... ion trapper, 4 ... cock, 5 ... dispenser, 6 ... cylinder, 7 ... substrate, 8 ... liquid crystal empty cell, 9 ... closed container,
10…シール材、 11…液晶、 12…イオントラップされた液晶、 13…プール、 14…キャップ。 10 ... sealing member, 11 ... liquid crystal, 12 ... ions trapped liquid, 13 ... pool, 14 ... cap.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 中尾 喜代子 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 ────────────────────────────────────────────────── ─── of the front page continued (72) inventor Kiyoko Nakao Osaka Prefecture Kadoma Oaza Kadoma 1006 address Matsushita Electric industrial Co., Ltd. in

Claims (2)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 周辺をシール材で囲まれた基板表面に液晶を滴下する工程と、前記基板と相対する基板を真空中で貼り合わせる工程を有し、前記基板表面にイオントラップをかけた液晶を滴下することを特徴とする液晶表示素子の製造方法。 [Claim 1, further comprising a step of dropping the liquid crystal surrounding the substrate surface surrounded by the sealing material, a step of bonding the substrate and opposing substrate in a vacuum, multiplied by the ion trap to said substrate surface a liquid crystal method of manufacturing a liquid crystal display element characterized by the dropwise addition of.
  2. 【請求項2】 基板の周囲をシール材で貼合わせた液晶空セルの入口を真空中で液晶に浸した後、大気圧に戻すことで空セル内に液晶を注入する工程を有し、真空中でイオントラップをかけた液晶に空セル入口を浸すことを特徴とする液晶表示素子の製造方法。 After the periphery of 2. A substrate was immersed inlet of the liquid crystal empty cells laminated with a sealant in the liquid crystal in vacuum, comprising the step of injecting liquid crystal into the empty cell by returning to atmospheric pressure, vacuum method of manufacturing a liquid crystal display element characterized by immersing the empty cell inlet to the liquid crystal multiplied by the ion trap in the middle.
JP27685093A 1993-11-05 1993-11-05 Production of liquid crystal display element Pending JPH07128674A (en)

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Publications (1)

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US6833901B2 (en) 2002-02-27 2004-12-21 Lg. Philips Lcd Co., Ltd. Method for fabricating LCD having upper substrate coated with sealant
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