JPS6220531B2 - - Google Patents
Info
- Publication number
- JPS6220531B2 JPS6220531B2 JP54049016A JP4901679A JPS6220531B2 JP S6220531 B2 JPS6220531 B2 JP S6220531B2 JP 54049016 A JP54049016 A JP 54049016A JP 4901679 A JP4901679 A JP 4901679A JP S6220531 B2 JPS6220531 B2 JP S6220531B2
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- crystal display
- adhesive
- display element
- parts
- 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
Links
- 239000004973 liquid crystal related substance Substances 0.000 claims description 26
- 239000000853 adhesive Substances 0.000 claims description 22
- 230000001070 adhesive effect Effects 0.000 claims description 22
- 239000011521 glass Substances 0.000 claims description 15
- -1 boron trifluoride amine Chemical class 0.000 claims description 13
- 239000003822 epoxy resin Substances 0.000 claims description 12
- 229920000647 polyepoxide Polymers 0.000 claims description 12
- WTEOIRVLGSZEPR-UHFFFAOYSA-N boron trifluoride Substances FB(F)F WTEOIRVLGSZEPR-UHFFFAOYSA-N 0.000 claims description 11
- 229910015900 BF3 Inorganic materials 0.000 claims description 10
- 230000001681 protective effect Effects 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 3
- 210000002858 crystal cell Anatomy 0.000 description 5
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 4
- 210000004027 cell Anatomy 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- QUSNBJAOOMFDIB-UHFFFAOYSA-N Ethylamine Chemical compound CCN QUSNBJAOOMFDIB-UHFFFAOYSA-N 0.000 description 2
- AFBPFSWMIHJQDM-UHFFFAOYSA-N N-methylaniline Chemical compound CNC1=CC=CC=C1 AFBPFSWMIHJQDM-UHFFFAOYSA-N 0.000 description 2
- GLUUGHFHXGJENI-UHFFFAOYSA-N Piperazine Chemical compound C1CNCCN1 GLUUGHFHXGJENI-UHFFFAOYSA-N 0.000 description 2
- 125000002723 alicyclic group Chemical group 0.000 description 2
- WGQKYBSKWIADBV-UHFFFAOYSA-N benzylamine Chemical compound NCC1=CC=CC=C1 WGQKYBSKWIADBV-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 2
- WYTZZXDRDKSJID-UHFFFAOYSA-N (3-aminopropyl)triethoxysilane Chemical compound CCO[Si](OCC)(OCC)CCCN WYTZZXDRDKSJID-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- JLTDJTHDQAWBAV-UHFFFAOYSA-N N,N-dimethylaniline Chemical compound CN(C)C1=CC=CC=C1 JLTDJTHDQAWBAV-UHFFFAOYSA-N 0.000 description 1
- 239000006087 Silane Coupling Agent Substances 0.000 description 1
- 239000004844 aliphatic epoxy resin Substances 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- HQABUPZFAYXKJW-UHFFFAOYSA-N butan-1-amine Chemical compound CCCCN HQABUPZFAYXKJW-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000004850 liquid epoxy resins (LERs) Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000007650 screen-printing Methods 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
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133528—Polarisers
Landscapes
- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
- Epoxy Resins (AREA)
- Adhesives Or Adhesive Processes (AREA)
Description
【発明の詳細な説明】
本発明は液晶表示素子に関し、特に液晶表示セ
ルの両面に上下偏光板を有し、該上下偏光板の表
面に更に保護用のガラス板が貼り付けられた液晶
表示素子に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a liquid crystal display element, and particularly to a liquid crystal display element having upper and lower polarizing plates on both sides of a liquid crystal display cell, and a protective glass plate further attached to the surface of the upper and lower polarizing plates. It is related to.
ツイストネマテイツク型の液晶表示素子におい
ては、液晶表示セルの上下に上下偏光板が設けら
れているが、この上下偏光板は高温あるいは高湿
下において容易に偏光能力がなくなつてしまう。 In a twisted nematic type liquid crystal display element, upper and lower polarizing plates are provided above and below a liquid crystal display cell, but these upper and lower polarizing plates easily lose their polarizing ability under high temperature or high humidity conditions.
このために、上記液晶表示素子においては、上
下偏光板の表面にそれぞれガラス板を貼り付ける
ことによつて上下偏光板の偏光能力低下を防止し
ている。 For this reason, in the liquid crystal display element described above, glass plates are attached to the surfaces of the upper and lower polarizing plates, respectively, to prevent the polarization ability of the upper and lower polarizing plates from decreasing.
しかし、上下偏光板へのガラス板の貼り付けは
極めて困難な作業である。つまり、上下偏光板は
熱に極めて弱いために、室温硬化型の接着剤を用
いる必要があるが、この室温硬化型の接着剤は印
刷が不可能であるために、偏光板とガラス板を合
せた後に接着剤をポツテイングして固定する方法
が用いられているが、作業性に問題があつた。 However, attaching the glass plates to the upper and lower polarizing plates is an extremely difficult task. In other words, since the upper and lower polarizing plates are extremely sensitive to heat, it is necessary to use a room-temperature curing adhesive, but since this room-temperature curing adhesive cannot be printed, the polarizing plate and the glass plate are combined. The method used is to pot the adhesive into place after the adhesive has been removed, but this method has problems with workability.
従つて本発明による目的は、信頼性にすぐれか
つ製造が極めて容易になる液晶表示装置を提供す
ることである。 SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a liquid crystal display device that is highly reliable and extremely easy to manufacture.
このような目的を達成するために本発明による
液晶表示素子は、偏光板と保護用のガラス板とを
貼り付ける接着剤としてエポキシ樹脂に三フツ化
ホウ素アミンコンプレツクスを混合したものを用
いたものである。以下、図面を用いて本発明によ
る液晶表示素子を詳細に説明する。 In order to achieve this purpose, the liquid crystal display element according to the present invention uses an epoxy resin mixed with a boron trifluoride amine complex as an adhesive for bonding a polarizing plate and a protective glass plate. It is. Hereinafter, a liquid crystal display element according to the present invention will be explained in detail using the drawings.
図は本発明による液晶表示素子の一実施例を示
す要部断面図であつて、同図において１は透明電
極を有する２枚のガラス基板２，３をスペーサ４
を介して積層し、その内部にツイストネマテイツ
ク型の液晶を注入して周囲を気密封止した一般に
公知の液晶セルである。５，６は液晶セル１の両
面にそれぞれ貼り付けられた上下偏光板であつ
て、この上下偏光板５，６は液晶セル１よりも多
少小さな寸法に設定されている。７は下偏光板６
の表面に貼り付けられた反射板、８，９は上偏光
板５および反射板７に積層した状態で貼り付けら
れた保護用のガラス板である。そして、このガレ
ラス板８，９を貼り付ける接着剤１０は、高温お
よび高湿に極めて弱い上下偏光板５，６の端面を
も覆うように塗布されている。 The figure is a cross-sectional view of a main part showing an embodiment of a liquid crystal display element according to the present invention.
This is a generally known liquid crystal cell in which twisted nematic type liquid crystal is injected into the cell and the periphery is hermetically sealed. Reference numerals 5 and 6 indicate upper and lower polarizing plates attached to both sides of the liquid crystal cell 1, respectively, and the dimensions of the upper and lower polarizing plates 5 and 6 are set to be somewhat smaller than that of the liquid crystal cell 1. 7 is the lower polarizing plate 6
The reflecting plates 8 and 9 attached to the surface of the upper polarizing plate 5 and the reflecting plate 7 are protective glass plates laminated and attached to the upper polarizing plate 5 and the reflecting plate 7, respectively. The adhesive 10 for attaching the Galeras plates 8 and 9 is applied so as to cover the end faces of the upper and lower polarizing plates 5 and 6, which are extremely sensitive to high temperatures and high humidity.
この場合、上記接着剤１０としては、エポキシ
樹脂に三フツ化ホウ酸アミンコンプレツクスを混
合した中温硬化型の接着剤が用いられている。こ
こで、エポキシ樹脂100重量部に対して三フツ化
ホウ素アミンコンプレツクスを0.5〜25重量部の
範囲に於いて混合すると、室温での硬化時間が長
くかつ偏光板に影響を与えない75℃程度で硬化が
可能であるとともに、充填剤を用いずに印刷が可
能となる接着剤が得られた。液状のエポキシ樹脂
としては、ビスフエノールＡ型エポキシ樹脂，脂
環式エポキシ樹脂，脂肪族系のエポキシ樹脂があ
り、こられを適当に混合することにより印刷性の
良い樹脂とすることができる。 In this case, the adhesive 10 is a medium-temperature curing adhesive made of an epoxy resin mixed with trifluoroboric acid amine complex. Here, if the boron trifluoride amine complex is mixed in the range of 0.5 to 25 parts by weight to 100 parts by weight of the epoxy resin, the curing time at room temperature is long and it does not affect the polarizing plate at around 75°C. An adhesive was obtained that could be cured at a temperature of 100 mL and that could also be printed without using a filler. Liquid epoxy resins include bisphenol A type epoxy resins, alicyclic epoxy resins, and aliphatic epoxy resins, and by appropriately mixing these, a resin with good printability can be obtained.
一方、三フツ化ホウ素アミンコンプレツクスと
してのアミンの種類としては、Ｎ―メチルアニリ
ン，エテルアミン，ベンジルアミン，2.4―ジメ
チルアミン，NN―ジメチルアニリン，ピペラジ
ン，ｎ―ブチルアミンなどがある。そして、エポ
キシ樹脂と三フツ化ホウ素アミンコンプレツクス
との混合比は、エポキシ樹脂100重量部に対して
三フツ化ホウ素アミンコンプレツクスを５重量部
とするのが良く、三フツ化ホウ素アミンコンプレ
ツクスの量が0.5重量部未満になると効果がな
く、また25重量部を越えると接着力が急激に減少
しかつ吸湿性が高くなることがわかつた。なお、
強い接着力が要求される場合には、三フツ化ホウ
素アミンコンプレツクスの配合量を25重量部以内
に於いて多くすれば良く、また反応が遅い場合に
は脂環式のエポキシ樹脂を多くしたり、エチルア
ミンコンプレツクスの量を多くすれば良い。ま
た、ガラスに対する接着強度を増すには、シラン
カツプリング剤を添加すれば良い。以下、接着剤
の実施例を説明する。 On the other hand, the types of amines used as the boron trifluoride amine complex include N-methylaniline, etelamine, benzylamine, 2,4-dimethylamine, NN-dimethylaniline, piperazine, and n-butylamine. The mixing ratio of the epoxy resin and the boron trifluoride amine complex is preferably 5 parts by weight of the boron trifluoride amine complex to 100 parts by weight of the epoxy resin. It has been found that if the amount is less than 0.5 parts by weight, there is no effect, and if it exceeds 25 parts by weight, the adhesive strength decreases rapidly and hygroscopicity increases. In addition,
If strong adhesion is required, increase the amount of boron trifluoride amine complex by up to 25 parts by weight, or if the reaction is slow, increase the amount of alicyclic epoxy resin. or increase the amount of ethylamine complex. Furthermore, in order to increase the adhesive strength to glass, a silane coupling agent may be added. Examples of the adhesive will be described below.
実施例 １
エポキシ当量約195のビスフエノールＡ型エポ
キシ樹脂100重量部、2.4ジメチルアニリンの三フ
ツ化ホウ素コンプレツクス15重量部、γ―アミノ
プロピルトリエトキシシラン１重量部を混合して
接着剤を得る。次に、230メツシユのスクリーン
を取り付けたスクリーン印刷機を用いてガラス板
８，９の全面に約30μの厚さに上記接着剤を印刷
する。次に真空下において泡ぬきを行なつた後、
予め偏光板が貼り付けられている液晶セルに当該
ガラス板を貼り付け、室温で４時間放置した後に
更に70℃で30分間硬化させる。Example 1 An adhesive is obtained by mixing 100 parts by weight of a bisphenol A type epoxy resin with an epoxy equivalent of about 195, 15 parts by weight of a boron trifluoride complex of 2.4 dimethylaniline, and 1 part by weight of γ-aminopropyltriethoxysilane. . Next, using a screen printing machine equipped with a 230-mesh screen, the adhesive is printed on the entire surface of the glass plates 8 and 9 to a thickness of about 30 μm. Next, after removing bubbles under vacuum,
The glass plate was attached to a liquid crystal cell to which a polarizing plate had been attached in advance, left to stand at room temperature for 4 hours, and then further cured at 70°C for 30 minutes.
このようにして作られた液晶表示素子を80℃、
95％RHの雰囲気下において寿命試験を行なつた
所、1000時間後においても何ら変化は生じなかつ
た。一方、保護用のガラス板を貼り付けない液晶
表示素子は、上記寿命試験条件下で100時間経過
した時点において偏光板のはがれおよび偏光能力
の消失が見られた。 The liquid crystal display element made in this way was heated to 80°C.
When a life test was conducted in an atmosphere of 95% RH, no change occurred even after 1000 hours. On the other hand, in the liquid crystal display element to which no protective glass plate was attached, peeling of the polarizing plate and loss of polarizing ability were observed after 100 hours had passed under the above life test conditions.
実施例 ２
実施例１と同様にして混合した接着剤をガラス
板８，９に実施例１と同様にしてわく状に印刷す
る。なお、このわく状に印刷された接着剤の一部
は空気出し口として一部除去してある。実施例１
と同様にして接着硬化させ、その後空気出し口を
同じ接着剤で気密封止する。このようにして作ら
れた液晶表示素子を実施例１と同様な方法を用い
て信頼性試験を行なつたが、実施例１の場合と同
様に1000時間に達しても何ら変化は生じなかつ
た。Example 2 An adhesive mixed in the same manner as in Example 1 is printed in a frame shape on glass plates 8 and 9 in the same manner as in Example 1. Note that a portion of the adhesive printed in the shape of a frame was removed as an air outlet. Example 1
The adhesive is cured in the same manner as above, and then the air outlet is hermetically sealed with the same adhesive. A reliability test was conducted on the liquid crystal display element thus produced using the same method as in Example 1, but as in Example 1, no change occurred even after 1000 hours. .
なお、上述した説明においては、一種の三フツ
化アミコンプレツクスを用いた場合のについて説
明したが、本発明はこれに限定されるものではな
く、複数種の三フツ化アミンコンプレツクスを混
合して用いても良い。 In the above explanation, a case was explained in which one type of amine trifluoride complex was used, but the present invention is not limited to this, and it is possible to use a mixture of multiple types of amine trifluoride complexes. It may also be used as
以上説明したように本発明により液晶表示素子
は、ガラス板を貼り付ける接着剤としてエポキシ
樹脂と三フツ化ホウ素アミンコンプレツクスを混
合したものを用いたために、接着剤を印刷で塗布
することができ、これに伴なつて作業性が大幅に
向上するとともに、液晶表示素子の信頼性を向上
させることができる優れた効果を有する。 As explained above, since the liquid crystal display element according to the present invention uses a mixture of epoxy resin and boron trifluoride amine complex as the adhesive for pasting the glass plate, the adhesive can be applied by printing. This has the excellent effect of significantly improving workability and improving the reliability of the liquid crystal display element.
図は本発明による液晶表示素子の一実施例を示
す要部断面図である。
１……液晶セル、５，６……上下偏光板、７…
…反射板、８，９……ガラス板、１０……接着
剤。
The figure is a sectional view of a main part showing an embodiment of a liquid crystal display element according to the present invention. 1...Liquid crystal cell, 5, 6...Upper and lower polarizing plates, 7...
...Reflector plate, 8, 9...Glass plate, 10...Adhesive.
Claims (1)
光板の外側に保護用のガラス板が貼り付けられた
液晶表示素子において、前記ガラス板の貼り付け
に用いる接着剤をエポキシ樹脂と三フツ化ホウ素
アミンコンプレツクスとの混合によつて構成した
ことを特徴とする液晶表示素子。 ２ 前記三フツ化ホウ素アミンコンプレツクスは
エポキシ樹脂100重量部に対して0.5〜25重量部と
した特許請求の範囲第１項記載の液晶表示素子。[Scope of Claims] 1. In a liquid crystal display element in which a liquid crystal display cell has polarizing plates on both sides and a protective glass plate is attached to the outside of the polarizing plate, an adhesive used for attaching the glass plate. A liquid crystal display element comprising a mixture of an epoxy resin and a boron trifluoride amine complex. 2. The liquid crystal display element according to claim 1, wherein the boron trifluoride amine complex is contained in an amount of 0.5 to 25 parts by weight based on 100 parts by weight of the epoxy resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4901679A JPS55140816A (en) | 1979-04-23 | 1979-04-23 | Liquid crystal display element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4901679A JPS55140816A (en) | 1979-04-23 | 1979-04-23 | Liquid crystal display element |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55140816A JPS55140816A (en) | 1980-11-04 |
| JPS6220531B2 true JPS6220531B2 (en) | 1987-05-07 |
Family
ID=12819329
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4901679A Granted JPS55140816A (en) | 1979-04-23 | 1979-04-23 | Liquid crystal display element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55140816A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62183741U (en) * | 1986-05-15 | 1987-11-21 |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS597435U (en) * | 1982-07-02 | 1984-01-18 | パイオニア株式会社 | LCD display |
| US6982178B2 (en) * | 2002-06-10 | 2006-01-03 | E Ink Corporation | Components and methods for use in electro-optic displays |
| JP4306269B2 (en) | 2003-02-12 | 2009-07-29 | 住友化学株式会社 | Polarizing plate, manufacturing method thereof, optical member, and liquid crystal display device |
| US8525405B2 (en) | 2011-08-19 | 2013-09-03 | Apple Inc. | Electronic devices with flexible glass polarizers |
-
1979
- 1979-04-23 JP JP4901679A patent/JPS55140816A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62183741U (en) * | 1986-05-15 | 1987-11-21 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55140816A (en) | 1980-11-04 |
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