JPS60175031A - Liquid crystal display element - Google Patents
Liquid crystal display elementInfo
- Publication number
- JPS60175031A JPS60175031A JP3092484A JP3092484A JPS60175031A JP S60175031 A JPS60175031 A JP S60175031A JP 3092484 A JP3092484 A JP 3092484A JP 3092484 A JP3092484 A JP 3092484A JP S60175031 A JPS60175031 A JP S60175031A
- Authority
- JP
- Japan
- Prior art keywords
- film
- liquid crystal
- crystal display
- display element
- polyester
- 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.)
- Granted
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
- G02F1/133305—Flexible substrates, e.g. plastics, organic film
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)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Treatments Of Macromolecular Shaped Articles (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
- Polyesters Or Polycarbonates (AREA)
- Liquid Crystal (AREA)
Abstract
Description
【発明の詳細な説明】
〔技術分野〕
本発明は１軸延伸ポリエステルフイルムからなる可撓性
透明基板を用いた液晶表示素子に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a liquid crystal display element using a flexible transparent substrate made of a uniaxially stretched polyester film.
従来、可撓性透明基板を用いた液晶表示素子は知られて
いる。またこの場合、可撓性透明基板として１軸延伸ポ
リエステルフイルムを用いることも知られている。しか
しながら、このような１軸延伸フイルムを液晶基板とし
て用いる場合、製品として得られる表示素子の基板が白
濁し、その光透過率が著しく減少するという問題があっ
た。BACKGROUND ART Liquid crystal display elements using flexible transparent substrates have been known. In this case, it is also known to use a uniaxially stretched polyester film as the flexible transparent substrate. However, when such a uniaxially stretched film is used as a liquid crystal substrate, there is a problem that the substrate of the display element obtained as a product becomes cloudy and its light transmittance is significantly reduced.
本発明は、前記のようなｌ軸延伸ポリエステルフィルム
を基板として用いる際に見られる光透過率減少の問題を
解決することを目的とする。An object of the present invention is to solve the problem of decreased light transmittance that occurs when using an l-axis stretched polyester film as described above as a substrate.
本発明によれば、１軸延伸ポリエステルフイルムからな
る透明基板を用いた液晶表示素子において、該ポリエス
テルフィルムは、加熱処理と溶剤処理の組合せにより、
該フィルム中に含まれる低分子量ポリエステルが除去さ
れていることを特徴とする液晶表示素子が提供される。According to the present invention, in a liquid crystal display element using a transparent substrate made of a uniaxially stretched polyester film, the polyester film is treated by a combination of heat treatment and solvent treatment.
A liquid crystal display element characterized in that the low molecular weight polyester contained in the film is removed is provided.
本発明の液晶表示素子において、その基板は、１軸延伸
ポリエステルフイルム（例えば、ポリエチレンテレフタ
レート、ポリブチレンテレフタレート等）からなるが、
本発明の場合、加熱処理と溶剤処理の組合せにより、そ
のフィルム中に含まれる低分子量のポリエステル分子が
除去されていることを特徴とする。液晶表示素子の製造
過程においては、基板に対して、複数回の加熱を伴った
表面処理（例えば、配向剤硬化処理等）が施されるが、
このような加熱後のｌ軸延伸ポリエステルフィルムには
、白濁が生じ、光透過率の著しい減少が起る。このよう
な白濁の生じたポリエステルフィルムを基板とする液晶
表示素子は表子コントラストの低下の問題を始め、表面
に形成された白濁粉による配向不良の問題等も生じる。In the liquid crystal display element of the present invention, the substrate is made of a uniaxially stretched polyester film (for example, polyethylene terephthalate, polybutylene terephthalate, etc.),
The present invention is characterized in that low molecular weight polyester molecules contained in the film are removed by a combination of heat treatment and solvent treatment. In the manufacturing process of liquid crystal display elements, the substrate is subjected to surface treatment (for example, alignment agent curing treatment, etc.) that involves heating multiple times.
After such heating, the l-axis stretched polyester film becomes cloudy and its light transmittance significantly decreases. A liquid crystal display device using such a cloudy polyester film as a substrate has problems such as a decrease in front contrast and poor alignment due to cloudy powder formed on the surface.
本発明者らは、これらの問題を解決するために鋭意研究
を重ねた結果、１軸延伸ポリエステルフイルムに対し、
加熱処理と溶剤処理を組合せて施すことによって、その
目的が達成されることを見出した。As a result of extensive research in order to solve these problems, the present inventors found that for uniaxially stretched polyester film,
It has been found that this objective can be achieved by applying a combination of heat treatment and solvent treatment.
本発明で採用する加熱処理は、空気等の気体状加熱媒体
を用いる加熱方式や、油等の液状加熱媒体を用いる加熱
方式等によって実施することができ、その加熱温度は８
０〜１６０℃程度であり、また加熱時間は１〜２４時間
程度である。この加熱処理によって、フィルムは白濁し
１表面には白濁粉が生じるが、このものは、低分子量の
ポリエステル析出物であることが確認されている。本発
明によれば、この加熱処理されたフィルムは１次に、溶
剤処理に付される。溶剤処理は、低分子量ポリエステル
に対し溶解性を示し、高分子ポリエステルに対しては溶
解性を示さない溶剤を用いる。このような溶剤は多種存
在するが、一般的には、多段階的に行なうことによって
実施される。たとえば。The heat treatment employed in the present invention can be carried out by a heating method using a gaseous heating medium such as air, a heating method using a liquid heating medium such as oil, etc., and the heating temperature is 8.
The temperature is about 0 to 160°C, and the heating time is about 1 to 24 hours. As a result of this heat treatment, the film becomes cloudy and cloudy powder is produced on the surface of the film, but this powder has been confirmed to be a low molecular weight polyester precipitate. According to the invention, this heat-treated film is first subjected to a solvent treatment. The solvent treatment uses a solvent that shows solubility for low molecular weight polyester but does not show solubility for high molecular weight polyester. Although there are many types of such solvents, it is generally carried out in multiple steps. for example.
第１段では脱脂洗浄としてトリクレン洗浄を行ない、第
２段階では脱水洗浄としてイソプロピルアルコール洗浄
を行ない、次にフレオン処理することができる。この溶
剤処理に関連して、超音波処理を併用することもできる
。この溶剤処理によって、フィルム表面上に析出し、白
濁を形成する低分子量ポリエステル析出物は、選択的に
溶解除去され、白濁のない光透過率の良好（８０％以上
）なフィルムが得られる。このフィルムは、加熱しても
。In the first stage, trichlene cleaning is performed as degreasing cleaning, and in the second stage, isopropyl alcohol cleaning is performed as dehydration cleaning, and then Freon treatment can be performed. In connection with this solvent treatment, ultrasonic treatment can also be used in combination. This solvent treatment selectively dissolves and removes the low molecular weight polyester precipitates that precipitate on the film surface and form cloudiness, resulting in a film with good light transmittance (80% or more) without cloudiness. This film can also be heated.
再び白濁を生じるようなことはない。There is no chance that cloudiness will occur again.
本発明における前記加熱処理及び溶剤処理の時点は特に
制約されず、液晶表示素子製造過程中又は製造過程前に
行うことができるが、一般には、液晶表示素子製造過程
前に行うのがよい。また、製造過程に組込んで行う場合
には、フィルム表面に電極を形成した直後に行うのがよ
い。The timing of the heat treatment and solvent treatment in the present invention is not particularly limited, and can be performed during or before the manufacturing process of a liquid crystal display element, but it is generally preferable to perform it before the manufacturing process of a liquid crystal display element. In addition, when it is incorporated into the manufacturing process, it is preferably carried out immediately after forming the electrodes on the film surface.
本発明の液晶表示素子は、前記のように、透明基板とし
て、特別のｌ軸延伸ポリエステルフィルムを用いた以外
は、従来のものと同様の構造を有するものであり、それ
らの液晶表示素子の具体的構造及びその製造法は当業者
に良く知られている。As mentioned above, the liquid crystal display element of the present invention has the same structure as the conventional one except that a special l-axis stretched polyester film is used as the transparent substrate. The structural structure and method of its manufacture are well known to those skilled in the art.
本発明の液晶表示素子においては、前記のように、その
透明基板として特別の１軸延伸ポリエステルフイルムを
用いたことにより、従来品に比べ、基板の光透過率は著
しく改良された高表示品質のものであり、また配向不良
の防止されたものでもある。As mentioned above, in the liquid crystal display element of the present invention, by using a special uniaxially stretched polyester film as its transparent substrate, the light transmittance of the substrate is significantly improved compared to conventional products, and high display quality can be achieved. It is also possible to prevent poor orientation.
次に本発明を実施例によりさらに詳細に説明する。 Next, the present invention will be explained in more detail with reference to Examples.
実施例
１軸延伸ポリエステルフイルム（ポリエチレンテレフタ
レートフィルム）（厚さ１００μｍ）を１５０℃で２時
間加熱処理したところ、光透過率は８４％から７６％へ
低下し、フィルムには白濁が生じた。Example When a uniaxially stretched polyester film (polyethylene terephthalate film) (thickness: 100 μm) was heat-treated at 150° C. for 2 hours, the light transmittance decreased from 84% to 76%, and the film became cloudy.
次に、この加熱処理フィルムを、超音波槽内で、トリク
レン、イソプロピルアルコール、及びフレオンを用いて
順次３０秒間づつ溶剤処理を施すと、フィルムの白濁は
消失し、またこの得られた溶剤処理フィルムは、再び１
５０℃で２時間加熱処理しても、その光透過率の減少は
見られず、８３％という良好な光透過率を示した。Next, when this heat-treated film is sequentially subjected to solvent treatment for 30 seconds each using trichlene, isopropyl alcohol, and Freon in an ultrasonic bath, the cloudiness of the film disappears, and the obtained solvent-treated film is 1 again
Even after heat treatment at 50° C. for 2 hours, no decrease in the light transmittance was observed, and a good light transmittance of 83% was observed.
特許出願人 株式会社 リ コ −
代理人弁理士池浦敏明
手 続 補 正 書
昭和５９年３月１９日
特許庁長官 若 杉 和 夫 殿
■、事件の表示
昭和５９年特許願第３０９２４号
２、発明の名称
液晶表示素子
３、補正をする者
事件との関係 特許出願人
住 所 東京都大田区中馬込１丁目３番６号氏 名 （
６７４） 株式会社 リ コ −代表者 浜 １） 広
４、代理人〒１５１
住 所 東京都渋谷区代々木１丁目５８番１０号５、補
正命令の日付 自 発
６、補正により増加する発明の数 ０
７、補正の対象 明細書の特許請求の範囲の欄８、補正
の内容 本願明細書中において特許請求の範囲を別紙の
通り訂正します。Patent Applicant Ricoh Co., Ltd. - Patent Attorney Toshiaki Ikeura Proceedings Amendment Written on March 19, 1981 Kazuo Wakasugi, Commissioner of the Patent Office, Indication of Case Patent Application No. 30924 No. 2, 1982, Invention Name of Liquid Crystal Display Element 3, Relationship to the Amendment Case Patent Applicant Address 1-3-6 Nakamagome, Ota-ku, Tokyo Name (
674) Rico Co., Ltd. - Representative Hama 1) Hiro 4, Agent 〒151 Address 1-58-10-5 Yoyogi, Shibuya-ku, Tokyo Date of amendment order Voluntary 6 Number of inventions increased by amendment 0 7. Subject of amendment Column 8 of claims in the specification, contents of amendment The scope of claims in the specification of this application will be corrected as shown in the attached sheet.
「特許請求の範囲
（１） １軸延伸ポリエステルフイルム力１らなる透明
基板を用いた液晶表示素子にお１λで、該ボＩＪエステ
ルフィルムは、加熱ゑ理と溶剤処理の組合せにより、該
フィルム中に含まれる低分子量ボ１ジエステルが除去さ
れていることを特徴とする液晶表示素子。」``Claims (1) In a liquid crystal display element using a transparent substrate made of a uniaxially stretched polyester film with a strength of 1λ, the IJ ester film can be formed in the film by a combination of heating treatment and solvent treatment. A liquid crystal display element characterized in that low molecular weight bo-1 diester contained in is removed.
Claims (1)
を用いた液晶表示素子において、該ポリエステルフィル
ムは、加熱処理と溶剤処理の組合せにより、該フィルム
中に含まれる低分子量ポリエステルが除去されているこ
とを特徴とする液晶表示素子。(1) In a liquid crystal display element using a transparent substrate made of a uniaxially stretched polyester film, it is confirmed that the low molecular weight polyester contained in the polyester film is removed by a combination of heat treatment and solvent treatment. Characteristic liquid crystal display element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3092484A JPS60175031A (en) | 1984-02-20 | 1984-02-20 | Liquid crystal display element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3092484A JPS60175031A (en) | 1984-02-20 | 1984-02-20 | Liquid crystal display element |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60175031A true JPS60175031A (en) | 1985-09-09 |
| JPH0516573B2 JPH0516573B2 (en) | 1993-03-04 |
Family
ID=12317232
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3092484A Granted JPS60175031A (en) | 1984-02-20 | 1984-02-20 | Liquid crystal display element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60175031A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5143663A (en) * | 1989-06-12 | 1992-09-01 | 3D Systems, Inc. | Stereolithography method and apparatus |
-
1984
- 1984-02-20 JP JP3092484A patent/JPS60175031A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5143663A (en) * | 1989-06-12 | 1992-09-01 | 3D Systems, Inc. | Stereolithography method and apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0516573B2 (en) | 1993-03-04 |
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