JPH01216317A - Manufacture of liquid crystal display panel - Google Patents
Manufacture of liquid crystal display panelInfo
- Publication number
- JPH01216317A JPH01216317A JP4275388A JP4275388A JPH01216317A JP H01216317 A JPH01216317 A JP H01216317A JP 4275388 A JP4275388 A JP 4275388A JP 4275388 A JP4275388 A JP 4275388A JP H01216317 A JPH01216317 A JP H01216317A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- electrode substrates
- electrode
- panel
- crystal substance
- 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 41
- 238000004519 manufacturing process Methods 0.000 title claims description 17
- 239000000758 substrate Substances 0.000 claims abstract description 42
- 238000000034 method Methods 0.000 claims abstract description 15
- 239000000126 substance Substances 0.000 claims abstract 5
- 238000010304 firing Methods 0.000 claims description 6
- 125000006850 spacer group Chemical group 0.000 abstract description 5
- 239000011800 void material Substances 0.000 abstract description 3
- 238000001354 calcination Methods 0.000 abstract description 2
- 239000007772 electrode material Substances 0.000 abstract description 2
- 230000007423 decrease Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 13
- 230000007246 mechanism Effects 0.000 description 6
- 239000003566 sealing material Substances 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 229920001187 thermosetting polymer Polymers 0.000 description 3
- 239000004642 Polyimide Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920006332 epoxy adhesive Polymers 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 229920001721 polyimide Polymers 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003550 marker Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 230000007723 transport mechanism Effects 0.000 description 1
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
- G02F1/1341—Filling or closing of cells
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はデイスプレィパネル、特に液晶表示パネルの製
造法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for manufacturing display panels, particularly liquid crystal display panels.
いる、この液晶表示素子は所望の電極パターンを形成し
た一対の電極基板間に液晶物質を充填してなる液晶表示
パネルとこの液晶表示パネルを駆動する駆動回路から成
る。This liquid crystal display element consists of a liquid crystal display panel formed by filling a liquid crystal material between a pair of electrode substrates on which a desired electrode pattern is formed, and a drive circuit for driving this liquid crystal display panel.
液晶表示パネルの製造工程は大きく分けて、１）各電電
極基板上に所望の電極パターンを形成し液晶を所定の配
向方向に揃えるための配向処理する工程、２）一対の前
記電極基板を一定の空隙を保ち、貼り合せ焼成し液晶の
充填してない空パネルを作る工程、３）前記空パネルに
液晶を充填し、封止する工程、４）前記液晶を充填した
パネルに一対の偏光板を貼り付け、電極端子とドライバ
ー回路を接続する工程の４工程からなっている。The manufacturing process of a liquid crystal display panel can be roughly divided into 1) an alignment process for forming a desired electrode pattern on each electrode substrate and aligning the liquid crystal in a predetermined alignment direction; and 2) a process for aligning a pair of electrode substrates in a fixed direction. 3) filling the empty panel with liquid crystal and sealing it; 4) attaching a pair of polarizing plates to the panel filled with liquid crystal. The process consists of four steps: pasting on the wire, and connecting the electrode terminal and driver circuit.
特に、３）の工程で液晶物質を空パネルに充填するため
には、２）の工程で作った空パネル内の一定空隙部を排
気し、しかる後に液晶物質を充填するのが通常であるが
、一定空隙部の厚みが１〜２０μｍとかなり薄いこと等
のため排気に長時間かかり製造時間が長くなる問題かあ
る。これは表示面積が大きくなるに従って、更に排気時
間が長くなりプロセス時間が長びき、製造上大きな問題
である。又、空パネル内の排気が不充分の場合、液晶物
質が充填できない領域が生じ不良液晶パネルを作る危険
性が常に存在する。In particular, in order to fill an empty panel with liquid crystal material in step 3), it is normal to evacuate a certain gap in the empty panel created in step 2) and then fill it with liquid crystal material. However, since the thickness of the fixed gap portion is quite thin at 1 to 20 μm, there is a problem that evacuation takes a long time and the manufacturing time increases. As the display area becomes larger, the evacuation time becomes longer and the process time becomes longer, which is a major problem in manufacturing. Furthermore, if the empty panel is not sufficiently vented, there is always a risk that there will be areas that cannot be filled with liquid crystal material, resulting in a defective liquid crystal panel.
本発明によれば一対の電極基板を貼り合せ焼成する工程
を真空で行うことで前述した従来技術の問題点、即ち、
空パネルの排気工程を短縮でき、かつ液晶物質の充填す
るプロセスで液晶物質が充填できない領域を生ずる不良
を改善できる。According to the present invention, the process of bonding and firing a pair of electrode substrates is performed in a vacuum, thereby solving the problems of the prior art described above, namely,
It is possible to shorten the evacuation process for empty panels, and to improve defects that occur in areas where the liquid crystal material cannot be filled in the liquid crystal material filling process.
次に、本発明を、図を参照してより詳細に説明する。 Next, the invention will be explained in more detail with reference to the figures.
図は本発明の液晶表示パネルの製造法及び製造装置の概
略図である。図において１．２は貼、り合せるべき１対
の電極基板である。両方の電極基板○
１．２上にはＩＴＤ等の電極材料で所望の電極パターン
が形成され、かつ一定方向に液晶物質を配向させるため
の配向処理がなされている。この配向処理としてはポリ
イミドの如き高分子を薄膜塗布し、焼成後高分子膜表面
を一定方向にラビングする方法がよく用いられる。また
、いずれか一方の電極基板１上には周電極基板を接着さ
せるべきシール材３が基板外周部にスクリーン印刷等の
手段を用いて所定のパターンに形成され、かつ電極基板
上内部表面上には貼り合せ後の空隙のすき間厚を制御す
るため、一定厚のスペーサ４が散布されである。シール
材としては熱硬化型のエポキシ樹脂が、又、スペーサ４
としてはガラスファイバー、ポリマーピースがよく用い
られる。The figure is a schematic diagram of a method and apparatus for manufacturing a liquid crystal display panel according to the present invention. In the figure, 1.2 is a pair of electrode substrates to be bonded together. A desired electrode pattern is formed on both electrode substrates 1.2 using an electrode material such as ITD, and an alignment process is performed to align the liquid crystal material in a certain direction. As this orientation treatment, a method is often used in which a thin film of a polymer such as polyimide is applied, and after firing, the surface of the polymer film is rubbed in a certain direction. Further, on one of the electrode substrates 1, a sealing material 3 to which the circumferential electrode substrate is to be bonded is formed in a predetermined pattern on the outer periphery of the substrate using means such as screen printing, and on the inner surface of the electrode substrate. In order to control the thickness of the gap after bonding, spacers 4 of a constant thickness are dispersed. Thermosetting epoxy resin is used as the sealing material, and spacer 4
Glass fiber and polymer pieces are often used.
本発明による製造法では、電極基板１，２を真空チャン
バー５内に持ち込み、真空チャンバー５内で周電極基板
１，２の位置合せを行い、貼り合せ、しかる後に加圧し
たまま焼成を行うものである。６は電極基板１をセット
するためのステージ７であり、７は電極基板２を保持し
、周電極基板１．２の位置合せを行うために直交３軸（
ｘ、 ｙ。In the manufacturing method according to the present invention, the electrode substrates 1 and 2 are brought into the vacuum chamber 5, the peripheral electrode substrates 1 and 2 are aligned in the vacuum chamber 5, and bonded together, and then fired while being pressurized. It is. 6 is a stage 7 for setting the electrode substrate 1, 7 is a stage 7 for holding the electrode substrate 2, and 7 is a stage 7 for orthogonal three axes (
x, y.
２）及び回転（θ）方向に調整できるような可動機構１
３を有するホルダーである。８は貼り合せた両基板を焼
成するためのヒーター付ステージであり、９は貼り合せ
焼成時に用いるプレス機構である。１０．１１は電極基
板１，２を真空チャンバー５内に持ち込むための搬送移
動機構であり、１２はステージ６上で貼り合せた周電極
基板１゜２を加圧焼成のためのヒーター付ステージ１２
に移すための搬送移動機構である。１４，１５．１６は
周電極基板１，２の相対的位置精度を検出するモニター
系であり、１４はモニター光学系、１５は検出器、１６
は照射光源である。１７は基板の真紐チャンバー５内へ
の入口である。2) and a movable mechanism 1 that can be adjusted in the rotation (θ) direction
This is a holder with 3. 8 is a stage equipped with a heater for firing both the bonded substrates, and 9 is a press mechanism used at the time of bonding and baking. 10.11 is a transport mechanism for bringing the electrode substrates 1 and 2 into the vacuum chamber 5, and 12 is a stage 12 equipped with a heater for pressurizing and firing the circumferential electrode substrates 1.2 bonded on the stage 6.
This is a transportation mechanism for transferring the 14, 15, and 16 are monitor systems for detecting the relative positional accuracy of the circumferential electrode substrates 1 and 2; 14 is a monitor optical system; 15 is a detector; 16
is the irradiation light source. Reference numeral 17 denotes an entrance into the cord chamber 5 for the substrate.
次に具体的製造法を説明する。Next, a specific manufacturing method will be explained.
電極基板として所望のパターンをＩＴＤ膜で形成したガ
ラス基板を用いた。電極基板上の所定の位置に両基板の
貼り合せ時の相対的位置を出すためのマーカーをＯｒ（
クロム）で加圧しである０両電極基板１，２上にはポリ
イミドを塗布し、２００℃、２時間焼成し、シ、かる後
ナイロン布で一定方向にラビング処理を行い、配向処理
を行った。電極基板１上にはシール材３として５，０μ
ｍのガラスファイバーを混合した熱硬化型エポキシ接着
剤を外周部上に液晶物質を充填するための一部を除きス
クリーン印刷した。熱硬化型エポキシ接着剤を８０℃、
１５分仮焼しレベリングを行った後、スペーサ４として
粒子系５μｍのポリマーピースを散布した。周電極基板
１，２を搬送移動系１０．１１を用いて、各々ステージ
６、及びホルダー１３にセット１、真空チャンバー５内
を１０−’Ｔｏｒｒまで排気した０両電極基板１．２の
相対的位置をこれら電極基板１，２上に形成したマーカ
ー間の位置をモニター光学系１４，１５．１６を見なが
ら、ホルダー７を可動機構１３を調整しながら合せた。A glass substrate on which a desired pattern was formed using an ITD film was used as an electrode substrate. A marker is placed at a predetermined position on the electrode substrate to indicate the relative position when bonding the two substrates together.
Polyimide was coated on both electrode substrates 1 and 2, which were pressurized with chromium), baked at 200°C for 2 hours, and then rubbed in a certain direction with a nylon cloth for orientation treatment. . A sealing material 3 of 5.0μ is placed on the electrode substrate 1.
A thermosetting epoxy adhesive mixed with glass fibers was screen printed on the outer periphery except for a part for filling the liquid crystal material. Thermosetting epoxy adhesive at 80℃,
After calcining for 15 minutes and leveling, polymer pieces with particle size of 5 μm were sprinkled as spacers 4. The circumferential electrode substrates 1 and 2 were set on the stage 6 and the holder 13 using the transport system 10.11, and the vacuum chamber 5 was evacuated to 10-'Torr. The positions of the markers formed on the electrode substrates 1 and 2 were adjusted while looking at the monitor optical systems 14, 15 and 16, and adjusting the movable mechanism 13 of the holder 7.
しかる後に電極基板２を下降させ、電極基板１゜２を貼
り合せた。貼り合せた周電極基板１，２を搬送移動系１
２を用いてヒーター付ステージ８上に取り付け、プレス
治具９を用いて、電極基板２上の圧力が面圧０．７ｋｇ
／ｃｒＡまで加圧し、ヒーターの電源を入れ、１５０℃
で３時間焼成した。しかし後、窒素ガスをリークし、貼
り合せ焼成したパネルを取り出し、液晶を充填するため
別のあらかじめ液晶をセットした真空チャンバーに入れ
、３０分排気し空パネルの封入口（外周部に形成したシ
ール材部のうち、一部シール材を設置しなかった領域）
部分を液晶に接して、真空チャンバー内に窒素リークを
行い、空パネル内に液晶を充填した。なお、参考のため
従来の大気中で貼り合せた空パネルも同時に液晶を充填
した。Thereafter, the electrode substrate 2 was lowered and the electrode substrate 1.degree. 2 was bonded. The bonded circumferential electrode substrates 1 and 2 are transferred to a transport system 1.
2 on the stage 8 with a heater, and using the press jig 9, the pressure on the electrode substrate 2 is set to a surface pressure of 0.7 kg.
/crA, turn on the heater, and raise the temperature to 150°C.
It was baked for 3 hours. However, after the nitrogen gas was leaked, the bonded and fired panel was taken out, and in order to fill it with liquid crystal, it was placed in another vacuum chamber in which liquid crystal was set in advance, and the air was evacuated for 30 minutes. (Part of the area where sealant was not installed)
The part was in contact with the liquid crystal, nitrogen was leaked into the vacuum chamber, and the empty panel was filled with liquid crystal. For reference, blank panels that had been bonded together in the atmosphere were also filled with liquid crystal at the same time.
本発明の製造法による空パネルでは、空隙部すべてに渡
って液晶が充填された。一方、従来の方法で作成した空
パネルでは空隙部の封入口と反対側１／３の領域には液
晶が充填されていなかった。In the blank panel manufactured by the manufacturing method of the present invention, all the voids were filled with liquid crystal. On the other hand, in the empty panel produced by the conventional method, the liquid crystal was not filled in the 1/3 region of the void on the side opposite to the filling opening.
以上に説明した実施例において、電極基板１゜２の貼り
合せを連続して行い、複数枚（代表的には１０枚）の空
パネルをヒーター付ステージ８上に積み上げ、複数枚の
空パネルを一括してプレスし焼成し、以下に液晶物質を
充填することもできる。In the embodiment described above, the electrode substrates 1.2 are successively bonded, and a plurality of empty panels (typically 10) are stacked on a stage 8 equipped with a heater. It is also possible to press and fire all at once, and then fill the space below with a liquid crystal material.
以上、詳細に説明したように、本発明の液晶表示パネル
の製造法により、パネル製造工程における液晶物質を充
填するための空パネル内の排気時間を短縮もしくは省略
できるようになり製造上のメリットは大きい。又、液晶
物質がパネル内に充填できない不良も著しく減少し、歩
留改善の効果も期待できる。更に、本発明による製造工
程に液晶物質を充填するためのチャンバーを連続して設
置し、貼り合せ焼成後、連続して液晶物質を充填するた
めのチャンバーに送り、工程をつなげば改善効果が更に
著しくなるのは明らかである。As explained above in detail, the manufacturing method of the liquid crystal display panel of the present invention makes it possible to shorten or omit the evacuation time in the empty panel for filling the liquid crystal material in the panel manufacturing process, which has the advantage in manufacturing. big. In addition, the number of defects in which the liquid crystal material cannot be filled into the panel is significantly reduced, and an improvement in yield can be expected. Furthermore, if chambers for filling the liquid crystal material are successively installed in the manufacturing process according to the present invention, and the process is connected by sequentially feeding the chambers for filling the liquid crystal material after bonding and firing, the improvement effect can be further improved. It is clear that this will become significant.
図は本発明の一実施例による製造法を説明するための製
造装置を示す概略断面図である。
１・・・・・・電極基板、２・・・・・・電極基板、３
・・・・・・シール材、４・・・・・・スペーサ、５・
・・・・・真空チャン／（−５６・・・・・・ステージ
、７・・・・・・可動機構、８・・・・・・ヒーター付
ステージ、９・・・・・・プレス治具、１０，１１゜１
２・・・・・・搬送移動機構、１３・・・・・・基板ホ
ルダー、１４・・・・・・モニター光学系、１５・・・
・・・検出器、１６・・・・・・照射光源、１７・・・
・・・真空チャンバー人口。
代理人 弁理士 内 原 晋The figure is a schematic sectional view showing a manufacturing apparatus for explaining a manufacturing method according to an embodiment of the present invention. 1... Electrode substrate, 2... Electrode substrate, 3
...Sealing material, 4...Spacer, 5.
...Vacuum chamber / (-56 ... Stage, 7 ... Movable mechanism, 8 ... Stage with heater, 9 ... Press jig ,10,11゜1
2... Conveyance movement mechanism, 13... Substrate holder, 14... Monitor optical system, 15...
...Detector, 16...Irradiation light source, 17...
...Vacuum chamber population. Agent Patent Attorney Susumu Uchihara
Claims (1)
充填してなる液晶表示パネルの製造法において、前記一
対の電極基板を一定の空隙を保ちながら貼り合せ焼成す
る工程を真空中で行い、しかる後に液晶中に浸漬して液
晶を前記空隙に充填することを特徴とする液晶表示パネ
ルの製造法。In a method for manufacturing a liquid crystal display panel in which a liquid crystal substance is filled between a pair of electrode substrates, at least one of which is transparent, a step of bonding and firing the pair of electrode substrates while maintaining a constant gap is performed in a vacuum. A method for manufacturing a liquid crystal display panel, which comprises subsequently immersing the panel in liquid crystal to fill the voids with liquid crystal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4275388A JPH01216317A (en) | 1988-02-24 | 1988-02-24 | Manufacture of liquid crystal display panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4275388A JPH01216317A (en) | 1988-02-24 | 1988-02-24 | Manufacture of liquid crystal display panel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01216317A true JPH01216317A (en) | 1989-08-30 |
Family
ID=12644761
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4275388A Pending JPH01216317A (en) | 1988-02-24 | 1988-02-24 | Manufacture of liquid crystal display panel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01216317A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0379714A2 (en) * | 1989-01-26 | 1990-08-01 | Nokia (Deutschland) GmbH | Method of making a liquid-crystal cell, and device therefor |
| DE10227826B4 (en) * | 2002-02-06 | 2009-12-17 | Lg Display Co., Ltd. | Method for producing an LCD |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57144525A (en) * | 1981-03-02 | 1982-09-07 | Seiko Epson Corp | Thin plate sticking device for liquid crystal display medium |
| JPS5957221A (en) * | 1982-09-28 | 1984-04-02 | Asahi Glass Co Ltd | Production of display element |
| JPS6155625A (en) * | 1984-08-24 | 1986-03-20 | Nippon Denso Co Ltd | Manufacture of liquid crystal element |
-
1988
- 1988-02-24 JP JP4275388A patent/JPH01216317A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57144525A (en) * | 1981-03-02 | 1982-09-07 | Seiko Epson Corp | Thin plate sticking device for liquid crystal display medium |
| JPS5957221A (en) * | 1982-09-28 | 1984-04-02 | Asahi Glass Co Ltd | Production of display element |
| JPS6155625A (en) * | 1984-08-24 | 1986-03-20 | Nippon Denso Co Ltd | Manufacture of liquid crystal element |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0379714A2 (en) * | 1989-01-26 | 1990-08-01 | Nokia (Deutschland) GmbH | Method of making a liquid-crystal cell, and device therefor |
| DE10227826B4 (en) * | 2002-02-06 | 2009-12-17 | Lg Display Co., Ltd. | Method for producing an LCD |
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