JP3050214B2 - Manufacturing method of liquid crystal display device - Google Patents
Manufacturing method of liquid crystal display deviceInfo
- Publication number
- JP3050214B2 JP3050214B2 JP10329466A JP32946698A JP3050214B2 JP 3050214 B2 JP3050214 B2 JP 3050214B2 JP 10329466 A JP10329466 A JP 10329466A JP 32946698 A JP32946698 A JP 32946698A JP 3050214 B2 JP3050214 B2 JP 3050214B2
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- display device
- crystal display
- seal portion
- manufacturing
- 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.)
- Expired - Lifetime
Links
Landscapes
- Liquid Crystal (AREA)
Description
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】本発明は、液晶表示装置のシ
ール部を、光硬化性樹脂を用いて形成する時の、液晶表
示装置の製造方法に関するものである。
【０００２】
【従来の技術】従来、液晶表示装置のシール部は、熱硬
化型のエポキシ系樹脂を用いてきたが、硬化させるため
には、１５０℃以上の高温で、少なくとも数時間の硬化
時間が必要であった。また、前記の事を改善するため、
光硬化性樹脂の検討が行われているが、樹脂の硬化時
に、ガラス基板と、シール部の境界で歪が残り、密着性
が不充分となり、上基板と下基板の接着力が不充分であ
ったり、耐熱、耐湿等の耐久性試験で、シール部が、は
がれたり、シール部周辺から配向が乱れてしまうという
問題があった。
【０００３】
【発明が解決しようとする課題】そこで本発明の目的
は、光硬化性樹脂の硬化時の歪を緩和する事により、シ
ール材とガラス基板の密着性を高め、接着力を強くし、
耐久性試験での信頼性を向上させる液晶表示装置の製造
方法を提供することにある。
【０００４】
【課題を解決するための手段】本願発明の液晶表示装置
の製造方法は、一対の基板をシール部を介して対向させ
てなる液晶表示装置の製造方法において、一方の前記基
板上に、前記シール部となる光硬化性樹脂を配設し、前
記光硬化性樹脂を硬化させずに、前記一方の基板を対向
させ組み合わせる工程と、前記光硬化性樹脂からなるシ
ール部に光を照射することにより前記シール部を硬化さ
せる工程と、前記シール部を硬化させた後、前記液晶表
示装置を１００℃〜１５０℃の温度範囲内で、３０分〜
１時間のベーク処理を行う工程とを有することを特徴と
する。
【０００５】また、前記アフターベーク処理は、１００
℃〜１５０℃の温度範囲内で、３０分〜１時間の条件下
で行われることを特徴とする。
【０００６】
【作用】すなわち、本発明は、アフターベークにより、
光硬化性樹脂とガラス基板の間に生じた歪を緩和するた
め、樹脂とガラス基板の接着力が強くなり、樹脂とガラ
ス基板の密着性の良いシール部が得られるわけである。
【０００７】
【発明の実施の形態】以下、実施例を挙げて本発明を具
体的に説明する。
【０００８】実施例１
図１の様に構成される液晶表示装置においてどちらか一
方のガラス基板１に、光硬化性樹脂を塗布し、対向する
もう一方のガラス基板１に、スペーサー６を均一分散さ
せ、組み合わせる。紫外線約３０００ｍＪ／ｃｍ２を照
射し、シール部４を形成した。更に、１００℃のオーブ
ンで３０分間、アフターベークを行い、冷却後、あらか
じめ設けてある封入口より液晶を封入し、封止剤にて封
着し液晶表示装置を得た。前記液晶表示装置を、耐温試
験（６０℃−９０％ＲＨ，５００Ｈ）を行ったが液晶の
配向は乱れなかった。また、耐熱試験（１２５℃，５０
０Ｈ）を行ったが、シール部がはがれる事はなく、ま
た、液晶層内への気泡の発生もなかった。
【０００９】実施例２
図１の様に構成される液晶表示装置において実施例１と
同様にして、シール部４を形成した。更に、１５０℃の
オーブンで３０分間、アフターベークを行い、冷却後、
あらかじめ設けてある封入口より液晶を封入し、封止剤
にて封着し、液晶表示装置を得た。以下、実施例１と同
様の耐久性試験を行ったが、配向の乱れ、シール部のは
がれ、液晶層内への気泡発生はなかった。
【００１０】比較例１
図１の様に構成される液晶表示装置において実施例１と
同様にして、シール部４を形成した。更に、８０℃のオ
ーブンで３０分間、アフターベークを行い、冷却後、あ
らかじめ設けてある封入口より液晶を封入し、封止剤に
て封着し、液晶表示装置を得た。前記液晶表示装置と、
耐熱試験（１２５℃，５００Ｈ）を行ったが、シール部
がはがれてしまった。
【００１１】比較例２
図１の様に構成される液晶表示装置において実施例１と
同様にして、シール部４を形成した。更に、１７０℃の
オーブンで３０分間、アフターベークを行い、冷却後、
あらかじめ設けてある封入口より液晶を封入し、封止剤
にて封着し、液晶表示装置を得た。前記液晶表示装置
を、耐熱試験（１２５℃，５００Ｈ）を行ったが、液晶
層内に気泡の発生が生じた。
【００１２】参考例
図１の様に構成される液晶表示装置においてどちらか一
方のガラス基板１に、光硬化性樹脂を塗布し、対向する
もう一方のガラス基板１に、スペーサー６を均一分散さ
せ、組み合わせる。これを６０℃のオーブンで３０分間
のプレベークを行い取り出した後、ただちに紫外線を３
０００ｍＪ／ｃｍ２照射し、シール部４を形成した。次
にあらかじめ設けてある封入口より液晶を封入し、封止
剤により封着し液晶表示装置を得た。以下、実施例１と
同様に耐久性試験を行ったが、配向の乱れ、シール部の
はがれ、液晶層内の気泡発生はなかった。
【００１３】比較例３
図１の様に構成される液晶表示装置において実施例５に
おけるプレベークの条件を１００℃，３０分にしたとこ
ろ、シール剤が、流れ出し、きれいなシール部が形成で
きなかった。
【００１４】比較例４
図１のように構成される液晶表示装置において実施例に
おけるプレベークの条件を、４０℃，３０分にし、以下
同様にして、液晶表示装置を得た。前記液晶表示装置
を、耐湿試験（６０℃−９０％ＲＨ，５００Ｈ）を行っ
たところ、シール部周辺より配向不良が生じた。
【００１５】以上の結果を表２に示す。
【００１６】
【表１】【００１７】
【発明の効果】以上述べてきたように、本発明によれ
ば、液晶表示装置のシール部に、光硬化性樹脂を用いた
場合の液晶表示装置のシール部材の硬化方法において、
紫外線をシール部材に照射させ、シール部材を硬化させ
た後に、さらに１００℃〜１５０℃の温度範囲内で、３
０分〜１時間のベーク処理を行う工程を加えることによ
り、シール部材とガラス基板との間の歪みを緩和するこ
とができるので、シール材とガラス基板の密着性を高
め、接着力を強くすることができる。
【００１８】更に、一対の基板の内面に設けられるシー
ル部と平面的に重ならないように配向膜を形成すること
により、基板と以降の工程で配設される光硬化性樹脂と
の間に配向膜が介在しないため、光硬化性樹脂と基板と
の密着性を、より高めることができ、シール部の接着力
を強くして、耐久性における信頼性を向上させた。Description: BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a method for manufacturing a liquid crystal display device when a seal portion of the liquid crystal display device is formed using a photocurable resin. is there. 2. Description of the Related Art Conventionally, a thermosetting epoxy resin has been used for a seal portion of a liquid crystal display device. However, in order to cure the sealing portion, a high temperature of 150 ° C. or more and a curing time of at least several hours are required. Was needed. Also, to improve the above,
Studies have been conducted on photo-curable resins, but when the resin is cured, distortion remains at the boundary between the glass substrate and the seal portion, resulting in insufficient adhesion and insufficient adhesion between the upper substrate and the lower substrate. In a durability test such as heat resistance and humidity resistance, there was a problem that the seal portion was peeled off or the orientation was disturbed from around the seal portion. [0003] Accordingly, an object of the present invention is to improve the adhesion between the sealing material and the glass substrate and to increase the adhesive force by alleviating distortion during curing of the photocurable resin. ,
An object of the present invention is to provide a method for manufacturing a liquid crystal display device that improves reliability in a durability test. According to a method of manufacturing a liquid crystal display device of the present invention, a method of manufacturing a liquid crystal display device in which a pair of substrates are opposed to each other via a seal portion is provided. Arranging a photo-curable resin to be the seal portion, irradiating the seal portion made of the photo-curable resin with light without curing the photo-curable resin, and combining the one substrate with facing the other substrate; Hardening the seal portion by doing, and after hardening the seal portion, the liquid crystal display device is kept in a temperature range of 100 ° C. to 150 ° C. for 30 minutes to 30 minutes.
Performing a one-hour baking process. [0005] The after-bake treatment is carried out at 100
It is carried out in a temperature range of from 150C to 150C, for from 30 minutes to 1 hour. That is, the present invention provides an after bake
In order to alleviate the strain generated between the photocurable resin and the glass substrate, the adhesive strength between the resin and the glass substrate is increased, and a seal portion having good adhesion between the resin and the glass substrate is obtained. Hereinafter, the present invention will be described in detail with reference to examples. Embodiment 1 In a liquid crystal display device configured as shown in FIG. 1, a photocurable resin is applied to one of the glass substrates 1 and the spacers 6 are uniformly dispersed on the other glass substrate 1 facing the same. And combine. Ultraviolet rays of about 3000 mJ / cm 2 were irradiated to form the seal portion 4. Further, after-baking was performed in an oven at 100 ° C. for 30 minutes, and after cooling, liquid crystal was sealed from a sealing hole provided in advance and sealed with a sealant to obtain a liquid crystal display device. The liquid crystal display device was subjected to a temperature resistance test (60 ° C.-90% RH, 500 H), but the orientation of the liquid crystal was not disturbed. In addition, heat resistance test (125 ° C, 50
0H), the sealing portion did not peel off, and no bubbles were generated in the liquid crystal layer. Example 2 A seal portion 4 was formed in the same manner as in Example 1 in the liquid crystal display device configured as shown in FIG. Furthermore, after-baking is performed in an oven at 150 ° C. for 30 minutes, and after cooling,
Liquid crystal was sealed from a sealing hole provided in advance, and sealed with a sealant to obtain a liquid crystal display device. Thereafter, a durability test similar to that of Example 1 was performed, but no disorder of the orientation, peeling of the sealing portion, and generation of bubbles in the liquid crystal layer were found. Comparative Example 1 A seal portion 4 was formed in the same manner as in Example 1 in a liquid crystal display device configured as shown in FIG. Further, after-baking was performed in an oven at 80 ° C. for 30 minutes, and after cooling, liquid crystal was sealed through a sealing hole provided in advance and sealed with a sealant to obtain a liquid crystal display device. The liquid crystal display device;
A heat resistance test (125 ° C., 500H) was performed, but the seal portion was peeled off. Comparative Example 2 In the liquid crystal display device configured as shown in FIG. 1, a seal portion 4 was formed in the same manner as in Example 1. Furthermore, after-baking is performed in an oven at 170 ° C. for 30 minutes, and after cooling,
Liquid crystal was sealed from a sealing hole provided in advance, and sealed with a sealant to obtain a liquid crystal display device. The liquid crystal display was subjected to a heat resistance test (125 ° C., 500 H), and bubbles were generated in the liquid crystal layer. REFERENCE EXAMPLE In a liquid crystal display device configured as shown in FIG. 1, a photocurable resin is applied to one of the glass substrates 1 and spacers 6 are uniformly dispersed on the other glass substrate 1 facing the same. ,combine. This was pre-baked in a 60 ° C. oven for 30 minutes and taken out.
Irradiation was performed at 000 mJ / cm 2 to form a seal portion 4. Next, liquid crystal was sealed through a sealing hole provided in advance, and sealed with a sealing agent to obtain a liquid crystal display device. Thereafter, a durability test was carried out in the same manner as in Example 1. However, there was no disorder in the orientation, the sealing portion peeled off, and no bubbles were generated in the liquid crystal layer. Comparative Example 3 In the liquid crystal display device configured as shown in FIG. 1, when the prebaking conditions in Example 5 were set to 100 ° C. for 30 minutes, the sealant flowed out, and a clean seal portion could not be formed. Comparative Example 4 In the liquid crystal display device configured as shown in FIG. 1, the prebaking conditions in the example were set at 40 ° C. for 30 minutes, and thereafter, a liquid crystal display device was obtained. When the liquid crystal display device was subjected to a moisture resistance test (60 ° C.-90% RH, 500 H), poor orientation occurred around the seal portion. Table 2 shows the above results. [Table 1] As described above, according to the present invention, there is provided a method for curing a sealing member of a liquid crystal display device using a photocurable resin for a sealing portion of the liquid crystal display device.
After irradiating the sealing member with ultraviolet rays and curing the sealing member, the sealing member is further cooled within a temperature range of 100 ° C. to 150 ° C.
By adding the step of performing the baking treatment for 0 minute to 1 hour, distortion between the sealing member and the glass substrate can be reduced, so that the adhesion between the sealing material and the glass substrate is increased, and the adhesive force is increased. be able to. Further, by forming an alignment film so as not to overlap the seal portions provided on the inner surfaces of the pair of substrates in a plane, the alignment between the substrate and the photo-curable resin provided in the subsequent steps is performed. Since no film is interposed, the adhesion between the photocurable resin and the substrate can be further improved, the adhesive force of the seal portion is increased, and the reliability in durability is improved.
【図面の簡単な説明】 【図１】一般的な液晶表示装置の断面図。 【符号の説明】 １……ガラス基板 ２……透明導電膜 ３……配向膜 ４……シール部 ５……液晶層 ６……スペーサー[Brief description of the drawings] FIG. 1 is a cross-sectional view of a general liquid crystal display device. [Explanation of symbols] 1 ... Glass substrate 2 ... Transparent conductive film 3. Alignment film 4 Seal part 5 ... Liquid crystal layer 6 ... spacer
Claims (1)
表示装置の製造方法において、 一方の前記基板上に、前記シール部となる光硬化性樹脂
を配設し、前記光硬化性樹脂を硬化させずに、前記一方
の基板を対向させ組み合わせる工程と、 前記光硬化性樹脂からなるシール部に光を照射すること
により前記シール部を硬化させる工程と、 前記シール部を硬化させた後、前記液晶表示装置を１０
０℃〜１５０℃の温度範囲内で、３０分〜１時間のベー
ク処理を行う工程と、 を有することを特徴とする液晶表示装置の製造方法。(57) [Claims] In a method for manufacturing a liquid crystal display device in which a pair of substrates face each other via a seal portion, a photocurable resin serving as the seal portion is provided on one of the substrates, and the photocurable resin is cured. Instead of facing the one substrate and combining the two, and irradiating the seal portion made of the photocurable resin with light to cure the seal portion. After curing the seal portion, the liquid crystal 10 display devices
Performing a baking treatment in a temperature range of 0 ° C. to 150 ° C. for 30 minutes to 1 hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10329466A JP3050214B2 (en) | 1998-11-19 | 1998-11-19 | Manufacturing method of liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10329466A JP3050214B2 (en) | 1998-11-19 | 1998-11-19 | Manufacturing method of liquid crystal display device |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9135359A Division JP2910729B2 (en) | 1997-05-26 | 1997-05-26 | Manufacturing method of liquid crystal display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11218774A JPH11218774A (en) | 1999-08-10 |
| JP3050214B2 true JP3050214B2 (en) | 2000-06-12 |
Family
ID=18221703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10329466A Expired - Lifetime JP3050214B2 (en) | 1998-11-19 | 1998-11-19 | Manufacturing method of liquid crystal display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3050214B2 (en) |
-
1998
- 1998-11-19 JP JP10329466A patent/JP3050214B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11218774A (en) | 1999-08-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20000229 |
|
| EXPY | Cancellation because of completion of term |