JPS5987429A - Liquid crystal display element - Google Patents
Liquid crystal display elementInfo
- Publication number
- JPS5987429A JPS5987429A JP19753982A JP19753982A JPS5987429A JP S5987429 A JPS5987429 A JP S5987429A JP 19753982 A JP19753982 A JP 19753982A JP 19753982 A JP19753982 A JP 19753982A JP S5987429 A JPS5987429 A JP S5987429A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- polyester resin
- crystal display
- display element
- sealant
- 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
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)
- Liquid Crystal (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は液晶表示素子、特にシール材の改良に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to improvements in liquid crystal display elements, particularly sealing materials.
近年、液晶表示素子において、液晶を封入させる外囲器
を従来のガラス基板に代えて透光性プラスチックフィル
ム基板で形成したプラスチック液晶表示素子が提案され
ている４、このプラスチック液晶表示素子は、対向面に
電極を形成した２枚のプラスチックフィルム基板間に液
晶を介在させ、周辺をシール材により封止することによ
って４’４成されている。特にツイストネマチック形表
示（以下ＴＮ表示と称する。）の液晶表示素子ではフィ
ルム基板の外面に偏光板を貼り合わせることにより、透
過形表示素子を、また２枚のフィルム基板のうち、上板
側に偏光板を、下板側に反射板をそれぞれ貼り合わせる
ことにより、反射形表示素子を構成している。In recent years, a plastic liquid crystal display element has been proposed in which the envelope for enclosing the liquid crystal is formed from a translucent plastic film substrate instead of the conventional glass substrate4. A 4'4 structure is constructed by interposing a liquid crystal between two plastic film substrates with electrodes formed on their surfaces and sealing the periphery with a sealing material. In particular, for twisted nematic type display (hereinafter referred to as TN display) liquid crystal display elements, by bonding a polarizing plate to the outer surface of the film substrate, the transmission type display element can be attached to the upper side of the two film substrates. A reflective display element is constructed by laminating a polarizing plate and a reflecting plate on the lower plate side.
このように構成される液晶表示素子は、第１図（ａ）
、 （ｂ）に示すように透光性のプラスチックフィルム
からなる上、下基板１，２の対向面にそれぞれ透光性の
上、下電極３，４を被着形成し、この上、下基板１，２
をスペーサを含有したシール利５を介して互いに対向配
置させて構成した外囲器６の中に液晶Ｔを封入し、上、
下基板・１，２の外面にそれぞれ上、下偏光板８，９を
配置して上、下電極３，４間の液晶の光学的性質を変化
させ、この変化を下偏光板９の外面に光反射板１０を配
置ｄシて上偏光板８側から認識することができる。The liquid crystal display element constructed in this way is shown in Fig. 1(a).
As shown in (b), transparent upper and lower electrodes 3 and 4 are formed on the opposing surfaces of the upper and lower substrates 1 and 2 made of transparent plastic films, respectively, and the upper and lower substrates are 1,2
A liquid crystal T is sealed in an envelope 6 configured by arranging the above and the like facing each other via a seal 5 containing a spacer.
Upper and lower polarizing plates 8 and 9 are arranged on the outer surfaces of the lower substrates 1 and 2, respectively, to change the optical properties of the liquid crystal between the upper and lower electrodes 3 and 4, and this change is applied to the outer surface of the lower polarizing plate 9. The light reflecting plate 10 can be positioned and recognized from the upper polarizing plate 8 side.
このように構成されるプラスチック液晶表示素子におい
ては、シール材５の硬化条件を、プラスチックの熱変形
温度（一般に１００℃程度）以下にする必−要があり、
従来のガラス素子の場合の硬化条件（約１５０℃〜２０
０℃）に比べるとはるかに低い。このような低温硬化の
条件では、シール材５の未反応部分が残ったり、低分子
量の物質を高温度でガス化して除去することが困難とな
るとともに、第１図で説明した素子構成において、シー
ル部に残留する汚染物質が液晶Ｉ内に溶解したり、上電
極３の電極リード３ａを腐食させ、その結果、表示特性
に悪影響を与えるという問題があった。In a plastic liquid crystal display element constructed in this way, the curing conditions for the sealing material 5 must be below the thermal deformation temperature of the plastic (generally about 100°C).
Curing conditions for conventional glass elements (approximately 150°C to 20°C
(0°C). Under such low-temperature curing conditions, unreacted portions of the sealing material 5 remain, and it becomes difficult to gasify and remove low-molecular-weight substances at high temperatures. There is a problem in that contaminants remaining in the seal portion dissolve into the liquid crystal I or corrode the electrode lead 3a of the upper electrode 3, thereby adversely affecting display characteristics.
しだがって本発明は前述した問題に島みてなされたもの
であり、その目的とするところは、表示特性の寿命およ
びイ８頼性を向上させた液晶表示素子を提供することに
ある。Therefore, the present invention has been made in view of the above-mentioned problems, and its object is to provide a liquid crystal display element with improved display characteristic life and reliability.
このような目的を達成するために本発明は、シール拐の
中に含有する汚染物質を除去したシール材を用いたもの
である。In order to achieve this object, the present invention uses a sealing material from which contaminants contained in the sealant have been removed.
次に本発明の実施例を詳細に説明する。 Next, embodiments of the present invention will be described in detail.
第２図は本発明による液晶表示素子の一例を示す要部断
面構成図であり、第１図（ａ） 、 （ｂ）と同記号は
同一要素どなるのでその説明は省略する。同図において
、上、下基板１，２第３図に示すように矢印Ａ方向に一
軸延伸した２枚のポリエチレンテレフタレートフィルム
１１．１２間に偏光子１３を介在させて形成した透光性
のプラスチックフィルムを用い、配向膜にはポリエーテ
ルアミド系の樹脂を用いた。さらにシール材５′として
イオン性物質を吸着剤で処理したポリエステル系樹脂を
用いた。この場合、このシール材５′は、ポリエステル
系４１脂に活性炭を５重置チ加え、室温で約２４時［１
旧１）才１・しｌ′こ後、濾過したものにさらに中性の
活性アルミナを２０重量係加えて約２時間攪拌し、４・
濾過して３１；Ｉ製したものを用いた。FIG. 2 is a cross-sectional view of essential parts showing an example of a liquid crystal display element according to the present invention, and the same symbols as in FIGS. 1(a) and 1(b) refer to the same elements, so a description thereof will be omitted. In the figure, upper and lower substrates 1 and 2 are made of transparent plastic formed by interposing a polarizer 13 between two polyethylene terephthalate films 11 and 12 uniaxially stretched in the direction of arrow A as shown in FIG. A film was used, and a polyetheramide resin was used for the alignment film. Furthermore, a polyester resin treated with an ionic substance adsorbent was used as the sealing material 5'. In this case, this sealing material 5' is prepared by adding activated carbon to polyester-based 41 resin in five layers at room temperature for about 24 hours.
1) After rinsing, add 20 parts by weight of neutral activated alumina to the filtered material and stir for about 2 hours.
The filtered product prepared in 31;I was used.
このような構成材料を用いて公知のプロセスで第２図に
示すような液晶表示素子をまず形成し、た。Using such constituent materials, a liquid crystal display element as shown in FIG. 2 was first formed by a known process.
さらに前述した構成材料のうち、シール材５′に未精製
のものを使用して同一プロセスで液晶表示素子を形成し
た。そして、これらの２種類の液晶表示素子間で液晶７
を介在させた上、下基板１゜２間に流れる電流値の量の
変化、すなわち、通常構成材料に不安定な物質が含まれ
る場合、熱あるいは光などの条件によシ、劣化による分
解あるいは拡散を起し１、液晶７内に溶は出すため、液
晶Ｔを挾持させる上、下基板１，２上の上、下電極３．
４間に電圧を印加すると、不安定要素があればあるほど
それら両電極３，４間に流れる電流は時間とともに増加
する変化を測定した結果、未精製のシール月５を用いた
場合は、精製したシール材５′を用いた場合に比べて電
流の増加率が２倍以上となることが確認することができ
、したがって、シール材５′の中に含有される汚染物質
が活性炭。Furthermore, a liquid crystal display element was formed in the same process using an unrefined sealing material 5' among the above-mentioned constituent materials. Then, between these two types of liquid crystal display elements, the liquid crystal 7
Changes in the amount of current flowing between the upper and lower substrates 1°2 through the interposition of In order to cause diffusion 1 and release the solution into the liquid crystal 7, upper and lower electrodes 3 .
When a voltage is applied between electrodes 4 and 4, the more unstable elements there are, the more the current flowing between both electrodes 3 and 4 increases over time. It can be confirmed that the rate of increase in current is more than double compared to the case where the sealing material 5' is used. Therefore, it can be confirmed that the contaminants contained in the sealing material 5' are activated carbon.
活性アルミナのイオン性物質に吸着されていることが明
らかとなった。It became clear that the activated alumina was adsorbed by ionic substances.
このような構成によれば、シール材５′は、含有されて
いる汚染物質が活性炭、活性アルミナのイオン性物質に
吸着されて精製されているので、液晶Ｉへの溶解が皆無
となる。また、低温度硬化に対して未反応部分の残留も
なくなるとともに、イ氏分子にの物質のガス化が容易に
可能となる。すなわち、低温度硬化が極めて容易となる
。According to such a configuration, the contaminants contained in the sealing material 5' are purified by being adsorbed by the ionic substances such as activated carbon and activated alumina, so that there is no dissolution into the liquid crystal I. In addition, there is no unreacted portion remaining during low temperature curing, and the substance can be easily gasified into I molecules. That is, low temperature curing becomes extremely easy.
なお、ｈ１］述した実施例において、シール利け、イオ
ン性物質の吸着剤による処理として、活性炭処理、活性
アルミナタル理を施した場片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、シリツｙゲル処理
あるいはイオン交換処理の１￥Ｌ独もしく ｙ、ｌ、こ
れらの組合せによって処理して精製したものであっても
前述と全く同様の効果が得られることは明らかである。In addition, h1] In the above-mentioned example, the case piece was subjected to activated carbon treatment and activated alumina treatment as a treatment with an adsorbent for sealing and ionic substances, but the present invention is not limited to this. It is clear that the same effect as described above can be obtained even if the product is purified by 1 yen gel treatment, ion exchange treatment, or a combination of these. .
また、前述した実施例において、上、下基板に透光性の
−ｒ、０１＋延伸のプラスチックフィルｌ、基板を用い
た場合について説明したが、本発明はこ′Ｉ′Ｌに限定
されるものでは女＜、透光性のガラス基板を用いた場合
においても前述と全く同等の効ＪＪｊ力ζイｑられるこ
とは明らかである。Furthermore, in the above-mentioned embodiments, a case was explained in which the upper and lower substrates were made of translucent -r, 01+ stretched plastic film L, and the substrate, but the present invention is limited to this. It is clear that the same effect as described above can be obtained even when a transparent glass substrate is used.
以上説明したように本発明によるシール材によれば、液
晶、電極リード等に悪影響なりえることがなくなるので
、表示特性の寿命が長く、信頼性の高い液晶表示素子が
得られるという極めて優れた効果を有する。As explained above, according to the sealing material according to the present invention, since there is no possibility of adverse effects on the liquid crystal, electrode leads, etc., extremely excellent effects can be obtained in that a highly reliable liquid crystal display element with a long display characteristic life can be obtained. has.
第１図（ａ） 、 （ｂ）はプラスチック液晶表示素子
の一例を示す要部斜視図、その捜部断面構成１スｊ、第
２図は本発明による液晶表示素子の一例を示す要部断面
構成図、第３図は第２図の電極基板の一例を示す要部斜
視図である。
１・・・・上基板、２・・・・下基板、３・・・・上電
極、３ａ ・・・ ・電極リード、４・・・・下′電極
、５・・・・シール材、５′・・・・イオン性物質の＠
、着剤により処理されたシール材、６・・・・外囲器、
７・・・・液晶、１１．１２・−９・ポリエチレンテレ
フタレートフィルム、１３・・・・偏光子。FIGS. 1(a) and (b) are perspective views of essential parts showing an example of a plastic liquid crystal display element, and a cross-sectional configuration of a portion thereof; FIG. 2 is a sectional view of essential parts showing an example of a liquid crystal display element according to the present invention. The configuration diagram and FIG. 3 are perspective views of essential parts showing an example of the electrode substrate of FIG. 2. 1... Upper substrate, 2... Lower substrate, 3... Upper electrode, 3a... - Electrode lead, 4... Lower' electrode, 5... Seal material, 5 ′・・・Ionic substance @
, sealing material treated with adhesive, 6...envelope,
7...Liquid crystal, 11.12.-9.Polyethylene terephthalate film, 13...Polarizer.
Claims (1)
材を介して封着し、該基板間に液晶を封入してなる液晶
表示素子において、前記シール材はイオン性物質の吸着
剤により処理したシール材を用いたことを特徴とする液
晶表示素子。 ２、前記電極基板をプラスチックフィルムとしたことを
特徴とする特許請求の範囲第１項記載の液晶表示素子。[Scope of Claims] 1. In a liquid crystal display element formed by sealing a peripheral portion between two electrically connected substrates arranged in an oriented manner via a sealing material, and sealing a liquid crystal between the substrates, the sealing material is a liquid crystal display element characterized by using a sealing material treated with an adsorbent of an ionic substance. 2. The liquid crystal display element according to claim 1, wherein the electrode substrate is made of a plastic film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19753982A JPS5987429A (en) | 1982-11-12 | 1982-11-12 | Liquid crystal display element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19753982A JPS5987429A (en) | 1982-11-12 | 1982-11-12 | Liquid crystal display element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5987429A true JPS5987429A (en) | 1984-05-21 |
Family
ID=16376152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19753982A Pending JPS5987429A (en) | 1982-11-12 | 1982-11-12 | Liquid crystal display element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5987429A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH035723A (en) * | 1989-06-01 | 1991-01-11 | Matsushita Electric Ind Co Ltd | Liquid crystal element |
-
1982
- 1982-11-12 JP JP19753982A patent/JPS5987429A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH035723A (en) * | 1989-06-01 | 1991-01-11 | Matsushita Electric Ind Co Ltd | Liquid crystal element |
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