JP3002316B2 - Electrophoretic display - Google Patents
Electrophoretic displayInfo
- Publication number
- JP3002316B2 JP3002316B2 JP3353490A JP35349091A JP3002316B2 JP 3002316 B2 JP3002316 B2 JP 3002316B2 JP 3353490 A JP3353490 A JP 3353490A JP 35349091 A JP35349091 A JP 35349091A JP 3002316 B2 JP3002316 B2 JP 3002316B2
- Authority
- JP
- Japan
- Prior art keywords
- display device
- electrophoretic display
- dispersion system
- flexible sheet
- metal plate
- 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 - Fee Related
Links
Landscapes
- Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Description
【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【０００１】[0001]
【産業上の利用分野】本発明は、電気泳動粒子を利用し
た表示装置に於いて、一方の電極板を可撓性シ−トで構
成すると共に、この可撓性シ−トの外面に金属板を配装
することにより、分散系に対する水分による透湿を防止
すると共に表示部を外的衝撃から保護する一方、熱的強
度をも向上させながら表示装置の耐久性を向上させるよ
うにした電気泳動表示装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device using electrophoretic particles, wherein one of the electrode plates is formed of a flexible sheet, and a metal sheet is formed on the outer surface of the flexible sheet. By arranging the plate, it is possible to prevent moisture from permeating the dispersion system due to moisture and protect the display unit from external impact, while improving the durability of the display device while improving the thermal strength. The present invention relates to a migration display device.
【０００２】[0002]
【従来の技術】電気泳動粒子を利用したこの種の電気泳
動表示装置は、図４の如く、対向面に各々酸化インジウ
ム・スズ等の適宜な透明導電部材を用いて所要の表示用
電極パタ−ン２、４を各別に形成した二枚の透明ガラス
板１、３を設け、液体分散媒に電気泳動粒子６を分散さ
せた分散系７をその対向間隙間に封入する為にスペ−サ
８の機能をも兼ねる封止部材５を外周部位に配装した構
造を有する。この構造の電気泳動表示装置は、電極パタ
−ン２、４に表示駆動用電圧を印加して電気泳動粒子６
を電極パタ−ン２、４に吸着・離反させ得るように分散
系７に電界を作用させて電気泳動粒子６の分布状態を変
えることによって分散系７の光学的特性に変化を与えて
文字、記号又は図形等の所望の表示動作を行わせるもの
である。2. Description of the Related Art As shown in FIG. 4, this type of electrophoretic display device using electrophoretic particles has a required display electrode pattern by using an appropriate transparent conductive member such as indium tin oxide on the opposing surfaces. Are provided with two transparent glass plates 1 and 3 each of which is formed separately, and a spacer 8 for enclosing a dispersion system 7 in which electrophoretic particles 6 are dispersed in a liquid dispersion medium between opposing gaps. Has a structure in which the sealing member 5 also having the function of (1) is disposed on the outer peripheral portion. In the electrophoretic display device having this structure, a display driving voltage is applied to the electrode patterns 2 and 4 so that the electrophoretic particles 6 are applied.
An electric field is applied to the dispersion system 7 to change the distribution state of the electrophoretic particles 6 so that the particles can be adsorbed and desorbed from the electrode patterns 2 and 4, thereby changing the optical characteristics of the dispersion system 7 so that characters, A desired display operation of a symbol or a graphic is performed.
【０００３】[0003]
【発明が解決しようとする課題】このような電気泳動表
示装置に於いて、一方の電極板にフィルム部材を使用す
る場合には、そのフィルム部材の水蒸気等の水分の透過
により使用環境の湿度の変化が分散液中の水分量に影響
を与えるので、表示装置として安定な動作を得ることが
困難である。また、一方の電極板にフィルム部材を用い
るこのような構造では外部からの物理的衝撃に弱いので
表示装置の機械的強度を確保することも難しい。In such an electrophoretic display device, when a film member is used for one of the electrode plates, the humidity of the operating environment is reduced due to the permeation of moisture such as water vapor through the film member. Since the change affects the amount of water in the dispersion, it is difficult to obtain a stable operation as a display device. Further, in such a structure using a film member for one electrode plate, it is difficult to secure the mechanical strength of the display device because it is vulnerable to external physical impact.
【０００４】[0004]
【課題を解決するための手段】本発明はそこで、電極板
の一方を可撓性シ−トで構成する場合、この可撓性シ−
トの外面に好ましくは透明電極板の基材の線膨張率と近
似する線膨張率を有する金属板を配装することによっ
て、可撓性シ−トと雰囲気とを遮断して分散系中の水分
を一定に保持し且つその金属板により表示装置を構造的
に補強して物理的衝撃に強い信頼性の高い表示装置を提
供するものである。SUMMARY OF THE INVENTION In the present invention, when one of the electrode plates is constituted by a flexible sheet, the flexible sheet is used.
By disposing a metal plate having a coefficient of linear expansion that is preferably close to the coefficient of linear expansion of the substrate of the transparent electrode plate on the outer surface of the sheet, the flexible sheet and the atmosphere are cut off and the An object of the present invention is to provide a highly reliable display device that holds moisture at a constant level and structurally reinforces the display device with its metal plate and is resistant to physical impact.
【０００５】[0005]
【実施例】以下、図示の実施例を参照しながら本発明を
更に詳述する。図１は本発明による電気泳動表示装置の
概念的な拡大断面構成図を示し、１０は透明な剛体電極
板を構成する為の基材としての透明なガラス板であって
その上面には酸化インジウム・スズ等の透明導電材料を
使用して所要の電極パタ−ン１１を適宜形成してある。
この剛体電極板の上面には分散系７を小区間に分割して
封入する為の多孔性スペ−サ１２を配装してある。この
多孔性スペ−サ１２は、シリコンゴム、ウレタンゴム、
フッ素ゴム、アクリルゴム等の合成ゴムや天然ゴム等の
素材からなるシ−ト状物にパンチ、レ−ザ等の手段で所
要の透孔を多数穿設したものを上記剛体電極板の電極パ
タ−ン１１形成側に一体的に設けるか、若しくは感光性
樹脂をその電極パタ−ン１１の上に被着形成してエッチ
ング等の化学的溶解手段で所要の透孔を任意に形成でき
る。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in further detail with reference to the illustrated embodiments. FIG. 1 is a conceptual enlarged cross-sectional view showing the configuration of an electrophoretic display device according to the present invention. Reference numeral 10 denotes a transparent glass plate as a base material for forming a transparent rigid electrode plate. The required electrode pattern 11 is appropriately formed using a transparent conductive material such as tin.
On the upper surface of the rigid electrode plate, a porous spacer 12 for distributing and enclosing the dispersion system 7 into small sections is provided. This porous spacer 12 is made of silicone rubber, urethane rubber,
A sheet-like material made of a material such as synthetic rubber such as fluorine rubber or acrylic rubber, or natural rubber or the like, having a number of required through-holes formed by punching, laser or the like, is used as the electrode pattern of the rigid electrode plate. The required through-holes can be arbitrarily formed by a chemical dissolving means such as etching or by integrally providing a photosensitive resin on the electrode pattern 11 or by forming a photosensitive resin on the electrode pattern 11.
【０００６】多孔性スペ−サ１２は、図２の如く、分散
系の分割封入の為の上記態様で形成される多数の透孔１
２Ｂを有すると共に、このスペ−サ１２の端部周域には
後述の可撓性電極板との関連に於いて、上記の透孔１２
Ｂを設けない斜線で示す接着固定部１２Ａを形成するの
が好適である。As shown in FIG. 2, the porous spacer 12 has a large number of through-holes 1 formed in the above-described manner for separately enclosing the dispersion system.
2B, and the periphery of the end of the spacer 12 has the above-mentioned through-hole 12 in connection with a flexible electrode plate described later.
It is preferable to form the adhesive fixing portion 12A indicated by oblique lines without B.
【０００７】このような多孔性スペ−サ１２の上面には
電極パタ−ン１１と対向する面に他の電極パタ−ン１４
を形成した可撓性シ−ト１３からなる可撓性電極板を配
装してある。可撓性シ−ト１３としては適当な合成樹脂
フィルム部材を使用することができる。On the upper surface of such a porous spacer 12, another electrode pattern 14 is provided on the surface facing the electrode pattern 11.
A flexible electrode plate made of a flexible sheet 13 formed with the above is disposed. As the flexible sheet 13, an appropriate synthetic resin film member can be used.
【０００８】１７は可撓性電極板を構成している可撓性
シ−ト１３の外面に配置した金属板であり、この金属板
１７は剛体電極板のガラス板１０の線膨張率と近似して
いる材料を用いるのが好ましい。このような金属板１７
としては、Ｆｅ−４２Ｎｉ、Ｆｅ−５２Ｎｉ、Ｆｅ−２
８Ｃｒ、ＫＯＶＡＲ、シルバニア＃４又は銅クラッドＫ
ＯＶＡＲ等の材料を用いることができる。Reference numeral 17 denotes a metal plate disposed on the outer surface of the flexible sheet 13 constituting the flexible electrode plate. The metal plate 17 is approximately the same as the linear expansion coefficient of the glass plate 10 as a rigid electrode plate. It is preferable to use a material that has the following properties. Such a metal plate 17
Are Fe-42Ni, Fe-52Ni, Fe-2
8Cr, KOVAR, Sylvania # 4 or copper clad K
Materials such as OVAR can be used.
【０００９】１６はこの表示装置の外周端部に設けられ
た接着剤であり、電極パタ−ン１１を形成したガラス板
１０からなる剛体電極板と、この剛体電極板上に配設さ
れた多孔性スペ−サ１２と、電極パタ−ン１４を有する
可撓性シ−ト１３で構成された可撓性電極板と及び上記
金属板１７とからなる各構成部材間をそれらの端部で固
定接合する為のものである。Reference numeral 16 denotes an adhesive provided at an outer peripheral end of the display device, which comprises a rigid electrode plate made of a glass plate 10 on which an electrode pattern 11 is formed, and a porous member provided on the rigid electrode plate. A flexible electrode plate composed of a flexible spacer 12, a flexible sheet 13 having an electrode pattern 14, and the above-mentioned metal plate 17 are fixed at their ends with each other. It is for joining.
【００１０】上記の如き電気泳動表示装置を製作するに
は、剛体電極板の電極パタ−ン１１上に多孔性スペ−サ
１２を配置し、この多孔性スペ−サ１２の各孔１２Ｂに
過剰に分散系７を供給してそれら各孔１２Ｂを分散系７
で充満させた状態で図３の如く多孔性スペ−サ１２上に
電極パタ−ン１４がそのスペ−サ１２に面するように可
撓性電極板を配置し、次いでこの可撓性電極板の上面一
端から加圧部材１５により押圧力を加えてその可撓性電
極板を介して多孔性スペ−サ１２を圧縮しながら余分な
分散系７を押し出すことによって、多孔性スペ−サ１２
の各孔１２Ｂに空孔のない分散系７の完全な封入を行わ
せることができる。In order to manufacture the electrophoretic display device as described above, a porous spacer 12 is disposed on an electrode pattern 11 of a rigid electrode plate, and an excess space is provided in each hole 12B of the porous spacer 12. To each of the holes 12B.
A flexible electrode plate is arranged on the porous spacer 12 so that the electrode pattern 14 faces the spacer 12 as shown in FIG. A pressing force is applied from one end of the upper surface of the porous spacers by a pressing member 15 to compress the porous spacers 12 through the flexible electrode plate and to push out the excess dispersion system 7, thereby making the porous spacers 12
Of the dispersion system 7 having no pores in each of the holes 12B.
【００１１】そこで、可撓性電極板の外面に金属板１７
を配置した段階でそれら構成部材の外端部周域に接着剤
１６を設けて部材間を固定接合することによって、この
表示装置を構成することができる。Therefore, a metal plate 17 is provided on the outer surface of the flexible electrode plate.
The display device can be configured by providing an adhesive 16 around the outer end portions of the constituent members at the stage where the components are arranged, and fixedly joining the members.
【００１２】上記に於いて、加圧部材１５には、気体、
液体或いは固体の少なくとも一つを適宜使用できるもの
であるが、図示の場合では鋼製ロ−ルを用いた例を示
す。In the above, gas, gas,
At least one of a liquid and a solid can be used as appropriate. In the illustrated case, an example using a steel roll is shown.
【００１３】上記構造の電気泳動表示装置に於いて、金
属板１７としてＫＯＶＡＲを用いた場合では、３０℃、
８０％ＲＨの環境下で表示不良の発生はなかった。In the electrophoretic display device having the above structure, when KOVAR is used as the metal plate 17, the temperature is 30 ° C.
No display failure occurred in an environment of 80% RH.
【００１４】そこで、比較の為、金属板としてアルミニ
ウムを使用して８０℃で３０分、次に室温で１５分、更
に−３０℃で３０分を１サイクルとする冷熱衝撃試験を
行ったところ、上記１サイクルの冷熱衝撃試験で線膨張
率の差から封止部分が破損した。これに対し、ＫＯＶＡ
Ｒを用いた本発明の場合では上記冷熱衝撃試験の５サイ
クル経過後でも封止構造からの破損は全くなかった。Therefore, for comparison, a thermal shock test was conducted using aluminum as a metal plate at 80 ° C. for 30 minutes, then at room temperature for 15 minutes, and at −30 ° C. for 30 minutes as one cycle. In the one-cycle thermal shock test, the sealed portion was damaged due to the difference in the coefficient of linear expansion. In contrast, KOVA
In the case of the present invention using R, there was no breakage from the sealing structure even after 5 cycles of the thermal shock test.
【００１５】なお、ガラス、ＫＯＶＡＲ及びアルミニウ
ムの各線膨張率を以下に示す。The linear expansion coefficients of glass, KOVAR and aluminum are shown below.
【００１６】 ガラス ： ８．０ ×１０-6 ＫＯＶＡＲ ： ４．９ ×１０-6 アルミニウム： ２．３１×１０-7 Glass: 8.0 × 10 −6 KOVAR: 4.9 × 10 −6 Aluminum: 2.31 × 10 −7
【００１７】[0017]
【発明の効果】本発明による電気泳動表示装置は、表示
装置の対向電極板の一方を可撓性シ−トで構成する場
合、この可撓性シ−トの外面に金属板を配装するように
構成してあるので、この可撓性シ−トの透湿を防止して
分散系中の水分を一定に保持し、また、その金属板の配
置により機械的強度にも強い信頼性の高い表示装置を提
供することができる。In the electrophoretic display device according to the present invention, when one of the opposing electrode plates of the display device is formed of a flexible sheet, a metal plate is provided on the outer surface of the flexible sheet. With this configuration, the flexible sheet is prevented from permeating moisture to keep the water content in the dispersion system constant, and the arrangement of the metal plate has high mechanical strength and high reliability. A high display device can be provided.
【００１８】そして、その金属板には透明な剛体電極板
に於けるガラス等の基材と線膨張率の近似する材料を使
用できるので、線膨張率の差によって封止構造が破損す
る等の事態を防止できるなど、熱的強度の高い耐久性の
良好な表示装置を提供することができる。Since a material having a linear expansion coefficient similar to that of a base material such as glass in a transparent rigid electrode plate can be used for the metal plate, the sealing structure may be damaged due to a difference in linear expansion coefficient. It is possible to provide a display device having high thermal strength and good durability, such as prevention of a situation.
【図面の簡単な説明】[Brief description of the drawings]
【図１】 本発明の一実施例により構成される電気泳動
表示装置の概念的な要部拡大断面構成図。FIG. 1 is a conceptual enlarged cross-sectional configuration diagram of a principal part of an electrophoretic display device according to an embodiment of the present invention.
【図２】 本発明で用いる多孔性スペ−サの部分拡大平
面構成図。FIG. 2 is a partially enlarged plan view of a porous spacer used in the present invention.
【図３】 本発明の電気泳動表示装置を製作する為の説
明図。FIG. 3 is an explanatory view for manufacturing the electrophoretic display device of the present invention.
【図４】 従来の電気泳動表示装置の概念的な要部拡大
断面構成図。FIG. 4 is a conceptual enlarged cross-sectional configuration diagram of a main part of a conventional electrophoretic display device.
１０ 透明ガラス板 １１ 電極パタ−ン １２ 多孔性スペ−サ １３ 可撓性シ−ト １４ 電極パタ−ン １５ 加圧部材 １６ 接合用接着剤 １７ 金属板 DESCRIPTION OF SYMBOLS 10 Transparent glass plate 11 Electrode pattern 12 Porous spacer 13 Flexible sheet 14 Electrode pattern 15 Pressing member 16 Bonding adhesive 17 Metal plate
───────────────────────────────────────────────────── フロントページの続き (72)発明者 多田隈 昭 茨城県稲敷郡茎崎町天宝喜757 日本メ クトロン株式 会社南茨城工場内 (72)発明者 森 高志 茨城県稲敷郡茎崎町天宝喜757 日本メ クトロン株式 会社南茨城工場内 (56)参考文献 特開 平１−300231（ＪＰ，Ａ) 特開 昭62−254130（ＪＰ，Ａ) 実開 平５−27728（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) G02F 1/167 G09F 9/37 311 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Akira Tadakuma 757 Tenhoki, Kusazaki-cho, Inashiki-gun, Ibaraki Japan Nippon Mektron Co., Ltd. Minami-Ibaraki Plant (72) Inventor Takashi Mori 757 Tenhoki, Kusazaki-cho, Inashiki-gun, Ibaraki Japan (56) References JP-A-1-300231 (JP, A) JP-A-62-254130 (JP, A) JP-A-5-27728 (JP, U) (58) Survey Field (Int.Cl. 7 , DB name) G02F 1/167 G09F 9/37 311
Claims (2)
板間に電気泳動粒子を含む分散系を封入し、上記電極板
間に印加した表示制御用電圧の作用下に分散系内の電気
泳動粒子の分布状態を変えることにより光学的反射特性
に変化を与えて所要の表示動作を行わせるようにした電
気泳動表示装置に於いて、上記分散系を不連続に分割す
る為に上記電極板間に介装した多孔性スペ−サを備え、
上記対向電極板の一方を可撓性シ−トで構成し、更にこ
の可撓性シ−トの外面に金属板を配装するように構成し
た電気泳動表示装置。1. A dispersion system containing electrophoretic particles is sealed between a pair of counter electrode plates, at least one of which is transparent, and the electrophoresis in the dispersion system is controlled by a display control voltage applied between the electrode plates. In an electrophoretic display device in which the required display operation is performed by changing the optical reflection characteristic by changing the distribution state of the particles, in order to divide the dispersion system discontinuously, the distance between the electrode plates is reduced. With a porous spacer interposed in
An electrophoretic display device in which one of the opposing electrode plates is formed of a flexible sheet, and a metal plate is provided on an outer surface of the flexible sheet.
膨張率と近似する線膨張率を有する材料で構成された請
求項１の電気泳動表示装置。2. The electrophoretic display device according to claim 1, wherein the metal plate is made of a material having a linear expansion coefficient close to a linear expansion coefficient of a substrate of the transparent electrode plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3353490A JP3002316B2 (en) | 1991-12-17 | 1991-12-17 | Electrophoretic display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3353490A JP3002316B2 (en) | 1991-12-17 | 1991-12-17 | Electrophoretic display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05165064A JPH05165064A (en) | 1993-06-29 |
| JP3002316B2 true JP3002316B2 (en) | 2000-01-24 |
Family
ID=18431193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3353490A Expired - Fee Related JP3002316B2 (en) | 1991-12-17 | 1991-12-17 | Electrophoretic display |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3002316B2 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6639578B1 (en) | 1995-07-20 | 2003-10-28 | E Ink Corporation | Flexible displays |
| US6017584A (en) * | 1995-07-20 | 2000-01-25 | E Ink Corporation | Multi-color electrophoretic displays and materials for making the same |
| US6120588A (en) * | 1996-07-19 | 2000-09-19 | E Ink Corporation | Electronically addressable microencapsulated ink and display thereof |
| US8040594B2 (en) | 1997-08-28 | 2011-10-18 | E Ink Corporation | Multi-color electrophoretic displays |
| ATE349722T1 (en) | 1998-07-08 | 2007-01-15 | E Ink Corp | IMPROVED COLOR MICRO-ENCAPSULED ELECTROPHORETIC DISPLAY |
| US20050156340A1 (en) | 2004-01-20 | 2005-07-21 | E Ink Corporation | Preparation of capsules |
| JP5403363B2 (en) | 2009-07-29 | 2014-01-29 | セイコーエプソン株式会社 | Method for enclosing dispersion containing electrophoretic particles |
| JP5533384B2 (en) | 2010-03-10 | 2014-06-25 | セイコーエプソン株式会社 | Encapsulation method for encapsulating a dispersion containing electrophoretic particles |
| TWI484275B (en) | 2010-05-21 | 2015-05-11 | E Ink Corp | Electro-optic display, method for driving the same and microcavity electrophoretic display |
-
1991
- 1991-12-17 JP JP3353490A patent/JP3002316B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05165064A (en) | 1993-06-29 |
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