JPH0750276B2 - Liquid crystal cell manufacturing method - Google Patents
Liquid crystal cell manufacturing methodInfo
- Publication number
- JPH0750276B2 JPH0750276B2 JP60285099A JP28509985A JPH0750276B2 JP H0750276 B2 JPH0750276 B2 JP H0750276B2 JP 60285099 A JP60285099 A JP 60285099A JP 28509985 A JP28509985 A JP 28509985A JP H0750276 B2 JPH0750276 B2 JP H0750276B2
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- photocurable resin
- display device
- crystal cell
- crystal display
- 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
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- Liquid Crystal (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 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、硬化方法に関するものである。Description: TECHNICAL FIELD The present invention relates to a curing method when a seal portion of a liquid crystal display device is formed using a photocurable resin.
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つ
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ち、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つたり、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つた。Conventionally, a thermosetting epoxy resin has been used for a seal portion of a liquid crystal display device, but it takes a curing time of at least several hours at a high temperature of 150 ° C. or higher for curing. Further, in order to improve the above, a photocurable resin has been studied, but when the resin is cured, a glass substrate,
Distortion remains at the boundary of the seal part, the adhesion becomes insufficient, the adhesive strength between the upper substrate and the lower substrate is insufficient, and the seal part peels off or seals in the durability test such as heat resistance and moisture resistance. There was a problem that the orientation was disturbed from around the area.
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、シール剤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
る液晶表示装置用シール剤の硬化方法を提供する事にあ
る。Therefore, an object of the present invention is to improve the adhesion between the sealant and the glass substrate by relaxing the strain during curing of the photocurable resin, strengthening the adhesive force, and improving the reliability in the durability test liquid crystal. Another object of the present invention is to provide a method for curing a sealant for a display device.
本発明の液晶セルの製造方法は、一対の基板の少なくと
も一方の基板内面のシール部に光硬化性樹脂を配設し、
しかる後前記一対の基板を対向させて組み合わせた後、
紫外線を照射して前記光硬化性樹脂を硬化させる液晶セ
ルの製造方法において、前記光硬化性樹脂を紫外線照射
により硬化させた後、100℃〜150℃の温度範囲内で、30
分〜１時間のアフターベーク処理を行うことを特徴とす
る。The method for producing a liquid crystal cell of the present invention, the photocurable resin is disposed in the seal portion of the inner surface of at least one of the pair of substrates,
After that, after combining the pair of substrates facing each other,
In the method for producing a liquid crystal cell in which the photocurable resin is irradiated with ultraviolet rays to be cured, after curing the photocurable resin by irradiation with ultraviolet rays, within a temperature range of 100 ° C to 150 ° C, 30
It is characterized in that after-baking treatment is performed for 1 minute to 1 hour.
また、本発明の第２の液晶セルの製造方法は、一対の基
板の少なくとも一方の基板内面のシール部に光硬化性樹
脂を配設し、しかる後前記一対の基板を対向させて組み
合わせた後、紫外線を照射して前記光硬化性樹脂を硬化
させる液晶セルの製造方法において、前記紫外線を照射
する前に、50℃〜80℃の温度範囲内で、プレベーク処理
を行い、ただちに紫外線を照射して前記光硬化性樹脂を
硬化させることを特徴とする。Further, the second method for producing a liquid crystal cell of the present invention is characterized in that a photocurable resin is provided in a seal portion on the inner surface of at least one of the pair of substrates, and then the pair of substrates are opposed to each other and assembled. In the method for producing a liquid crystal cell in which the photo-curable resin is cured by irradiating with ultraviolet rays, a pre-baking treatment is performed within a temperature range of 50 ° C. to 80 ° C. before irradiating with the ultraviolet rays, and the ultraviolet rays are immediately irradiated. And curing the photocurable resin.
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解消する事によ
り、樹脂と、ガラス基板の接着力が強くなるものであ
る。また、プレベークにより、光硬化性樹脂の粘度が低
下し、流動性が高まる、また、ガラス基板への が良くなり、前記プレベーク直後の紫外線照射により、
前記光硬化性樹脂を硬化させ、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。That is, in the present invention, the adhesive force between the resin and the glass substrate is strengthened by eliminating the distortion generated between the photocurable resin and the glass substrate by the after-baking. Also, the pre-baking reduces the viscosity of the photocurable resin and increases the fluidity, and The UV irradiation immediately after the pre-baking improves the
The photocurable resin is cured to obtain a seal portion having good adhesion between the resin and the glass substrate.
以下、実施例を挙げて本発明を具体的に説明する。 Hereinafter, the present invention will be specifically described with reference to examples.
実施例１ 第１図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）を行つたが液晶の配向は乱れなかつた。ま
た、耐熱試験（125℃,500H）を行つたが、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
つた。Example 1 In the liquid crystal display device configured as shown in FIG. 1, a photo-curable 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 glass substrate 1. Combine. Ultraviolet rays of about 3000 mJ / cm 2 were irradiated to form the seal portion 4. Furthermore, in an oven at 100 ° C for 30 minutes,
After after-baking and cooling, liquid crystal was sealed from a sealing port provided in advance and sealed with a sealant to obtain a liquid crystal display device. The liquid crystal display device was tested for temperature resistance (60 ° C-90%
RH, 500H), the alignment of the liquid crystal was not disturbed. In addition, a heat resistance test (125 ° C, 500H) was performed, but the seal did not peel off, and no bubbles were generated in the liquid crystal layer.
実施例２ 第１図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
の耐久性試験を行つたが、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つた。Example 2 Example 1 in the liquid crystal display device configured as shown in FIG.
The seal portion 4 was formed in the same manner as in. Further, after-baking was performed in an oven at 150 ° C. for 30 minutes, and after cooling, liquid crystal was sealed from a sealing port provided in advance and sealed with a sealant to obtain a liquid crystal display device. Hereinafter, the same durability test as in Example 1 was conducted, but the alignment was disturbed, the seal portion was peeled off, and no bubbles were generated in the liquid crystal layer.
比較例１ 第１図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）を行つたが、シール部がはがれて
しまつた。Comparative Example 1 Example 1 in the liquid crystal display device configured as shown in FIG.
The seal portion 4 was formed in the same manner as in. Further, after-baking was performed in an oven at 80 ° C. for 30 minutes, and after cooling, liquid crystal was sealed through a sealing port provided in advance and sealed with a sealant to obtain a liquid crystal display device. A heat resistance test (125 ° C, 500H) was performed on the liquid crystal display device, but the seal part was peeled off.
比較例２ 第１図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）を行つたが、液晶層内に気泡の
発生が生じた。Comparative Example 2 Example 1 in a liquid crystal display device configured as shown in FIG.
The seal portion 4 was formed in the same manner as in. Furthermore, after-baking was performed in an oven at 170 ° C. for 30 minutes, and after cooling, liquid crystal was sealed from a sealing port 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 ℃, 500H) was performed, but bubbles were generated in the liquid crystal layer.
実施例３ 第１図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、組み合せる。これを60℃のオーブンに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3000mJ
/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
験を行つたが、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つた。Example 3 In the liquid crystal display device configured as shown in FIG. 1, one of the glass substrates 1 is coated with a photocurable resin, and the other glass substrate 1 facing the spacer 6 is uniformly dispersed. Combine. This was prebaked for 30 minutes in an oven at 60 ° C and taken out, then immediately exposed to ultraviolet rays of 3000 mJ.
/ cm 2 was irradiated to form a seal part 4. Next, liquid crystal was sealed through a sealing port provided in advance and sealed with a sealant to obtain a liquid crystal display device. Thereafter, a durability test was performed in the same manner as in Example 1, but the alignment was disturbed, the seal portion was peeled off, and no bubbles were generated in the liquid crystal layer.
比較例３ 第１図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
かつた。Comparative Example 3 Example 5 in the liquid crystal display device configured as shown in FIG.
When prebaking conditions in 100 ° C, 30 minutes,
The sealant flowed out and a clean seal part could not be formed.
比較例４ 第１図の様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）を行つたところ、シー
ル部周辺より配向不良が生じた。Comparative Example 4 Example of liquid crystal display device configured as shown in FIG.
The pre-baking condition was set to 40 ° C. for 30 minutes, and in the same manner as above, a liquid crystal display device was obtained. The liquid crystal display device,
When a humidity resistance test (60 ° C.-90% RH, 500H) was performed, defective orientation occurred around the seal portion.
以上の結果を表１に示す。The above results are shown in Table 1.
〔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時の硬化方法にお
いて、紫外線照射による硬化後にアフターベークを行う
ことにより、樹脂とガラス基板の密着性を高め、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。あるいは、紫外線による硬化直前に、プレベーク
を行うことにより、樹脂のガラス基板への を高め、紫外線照射により硬化した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。そのた
め、今まで、接着力の不足からなる信頼性の不足よりシ
ール部への適用が見送れてきた光硬化性接着剤が、シー
ル部への使用が可能になり、短時間で、シール部の硬化
が行えるようになつた。 [Effects of the Invention] As described above, according to the present invention, in the curing method when the photocurable resin is used in the seal portion of the liquid crystal display device, by performing afterbaking after curing by ultraviolet irradiation. , The adhesion between the resin and the glass substrate was enhanced, and the adhesive strength of the seal part was strengthened to improve reliability in durability. Alternatively, pre-baking may be performed immediately before curing by ultraviolet rays to prevent the resin from being applied to the glass substrate. And the adhesive strength of the seal portion cured by ultraviolet irradiation was strengthened to improve reliability in durability. Therefore, the photo-curable adhesive, which has been postponed for application to the seal part due to lack of reliability due to insufficient adhesive force, can now be used for the seal part, and the seal part can be used in a short time. It became possible to cure.
第１図は一般的な液晶表示装置の断面図。 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 FIG. 1 is a sectional view of a general liquid crystal display device. 1 ... Glass substrate 2 ... Transparent conductive film 3 ... Alignment film 4 ... Seal part 5 ... Liquid crystal layer 6 ... Spacer
───────────────────────────────────────────────────── フロントページの続き (72)発明者 尾崎 清 埼玉県越谷市三野宮627 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Kiyoshi Ozaki 627 Minomiya, Koshigaya, Saitama Prefecture
Claims (2)
シール部に光硬化性樹脂を配設し、しかる後前記一対の
基板を対向させて組み合わせた後、紫外線を照射して前
記光硬化性樹脂を硬化させる液晶セルの製造方法におい
て、 前記光硬化性樹脂を紫外線照射により硬化させた後、10
0℃〜150℃の温度範囲内で、30分〜１時間のアフターベ
ーク処理を行うことを特徴とする液晶セルの製造方法。1. A photocurable resin is disposed on a seal portion on the inner surface of at least one of the pair of substrates, and then the pair of substrates are assembled so as to face each other, and then the photocurable resin is irradiated with ultraviolet rays. In a method of manufacturing a liquid crystal cell for curing a resin, after curing the photocurable resin by ultraviolet irradiation, 10
A method for producing a liquid crystal cell, which comprises performing an after-baking treatment for 30 minutes to 1 hour within a temperature range of 0 ° C to 150 ° C.
シール部に光硬化性樹脂を配設し、しかる後前記一対の
基板を対向させて組み合わせた後、紫外線を照射して前
記光硬化性樹脂を硬化させる液晶セルの製造方法におい
て、 前記紫外線を照射する前に、50℃〜80℃の温度範囲内
で、プレベーク処理を行い、ただちに紫外線を照射して
前記光硬化性樹脂を硬化させることを特徴とする液晶セ
ルの製造方法。2. A photocurable resin is disposed on a seal portion on the inner surface of at least one of the pair of substrates, and then the pair of substrates are assembled so as to face each other, and then the photocurable resin is irradiated with ultraviolet rays. In the method for producing a liquid crystal cell for curing a resin, before irradiating the ultraviolet rays, in a temperature range of 50 ℃ ~ 80 ℃, prebaking treatment, immediately irradiate the ultraviolet rays to cure the photocurable resin A method for manufacturing a liquid crystal cell, comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60285099A JPH0750276B2 (en) | 1985-12-18 | 1985-12-18 | Liquid crystal cell manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60285099A JPH0750276B2 (en) | 1985-12-18 | 1985-12-18 | Liquid crystal cell manufacturing method |
Related Child 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 |
|---|---|
| JPS62144142A JPS62144142A (en) | 1987-06-27 |
| JPH0750276B2 true JPH0750276B2 (en) | 1995-05-31 |
Family
ID=17687112
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60285099A Expired - Lifetime JPH0750276B2 (en) | 1985-12-18 | 1985-12-18 | Liquid crystal cell manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0750276B2 (en) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5473063A (en) * | 1977-11-22 | 1979-06-12 | Dainippon Printing Co Ltd | Method of fabricating electrooptical cell |
| JPS5585043A (en) * | 1978-12-22 | 1980-06-26 | Nippon Telegr & Teleph Corp <Ntt> | Layer insulator and its preparation |
| JPS55164811A (en) * | 1979-06-08 | 1980-12-22 | Alps Electric Co Ltd | Liquid crystal cell forming method |
| JPS58105124A (en) * | 1981-12-16 | 1983-06-22 | Matsushita Electric Ind Co Ltd | Manufacturing method of liquid crystal display panel |
| JPS58187914A (en) * | 1982-04-28 | 1983-11-02 | Hitachi Ltd | Manufacture of liquid crystal display element |
| JPS5974527A (en) * | 1982-10-21 | 1984-04-27 | Seiko Epson Corp | Sealing agent for liquid crystal panel |
| JPS5993421A (en) * | 1982-11-19 | 1984-05-29 | Hitachi Ltd | Manufacturing method of liquid crystal display element |
| JPS59152420A (en) * | 1983-02-18 | 1984-08-31 | Matsushita Electric Ind Co Ltd | Sealing resin for liquid crystal panel |
| JPS59152419A (en) * | 1983-02-18 | 1984-08-31 | Matsushita Electric Ind Co Ltd | Sealing resin for LCD panels |
-
1985
- 1985-12-18 JP JP60285099A patent/JPH0750276B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62144142A (en) | 1987-06-27 |
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| EXPY | Cancellation because of completion of term |