JP2733686B2 - Electrophoretic display - Google Patents
Electrophoretic displayInfo
- Publication number
- JP2733686B2 JP2733686B2 JP1106808A JP10680889A JP2733686B2 JP 2733686 B2 JP2733686 B2 JP 2733686B2 JP 1106808 A JP1106808 A JP 1106808A JP 10680889 A JP10680889 A JP 10680889A JP 2733686 B2 JP2733686 B2 JP 2733686B2
- Authority
- JP
- Japan
- Prior art keywords
- display device
- electrophoretic display
- gap
- electrophoretic
- dispersion system
- 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
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- 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】 「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関するも
ので、特には、対向電極板間に表示用分散系を小区間に
不連続相に分割して封入するための多孔性スペーサを備
える構造の分散系分割型電気泳動表示装置に於いて、少
なくとも表示側電極板に形成された電極パターン相互間
のギャップに対する電気泳動粒子の漸次的な移動付着に
よる疑似的な不要表示の発生を好適に防止してコントラ
ストの良好な表示動作を確保すべく構成した分散系分割
型の電気泳動表示装置に関する。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device using electrophoretic particles, and in particular, divides a display dispersion system into small sections between discontinuous phases between opposed electrode plates. In a dispersed-system split-type electrophoretic display device having a structure including a porous spacer for enclosing the electrophoretic particles, the electrophoretic particles gradually move and adhere to at least gaps between electrode patterns formed on the display-side electrode plate. The present invention relates to a dispersion-division-type electrophoretic display device configured to preferably prevent occurrence of pseudo unnecessary display due to the above and to ensure a display operation with good contrast.
「従来の技術」 この種の電気泳動表示装置は、少なくとも一方が透明
な対向配置した一組の電極板間に液体分散媒に電気泳動
粒子を分散させた分散系を封入し、上記電極板の極性に
応じて分散媒中の電気泳動粒子を透明電極板側に吸着又
は離反させ得るように該極性を制御しながら、所望の文
字、記号或いは図形等を表示可能に構成してものであ
る。“Prior art” This type of electrophoretic display device has a configuration in which a dispersion system in which electrophoretic particles are dispersed in a liquid dispersion medium is sealed between a pair of electrode plates arranged so that at least one of them is transparent. A desired character, symbol, figure, or the like can be displayed while controlling the polarity so that the electrophoretic particles in the dispersion medium can be adsorbed or separated on the transparent electrode plate side according to the polarity.
斯かる電気泳動表示装置の分散系に使用される分散媒
としては、芳香族炭化水素、脂肪族炭化水素、脂環族炭
化水素、各種エステル類、アルコール系溶媒、ハロゲン
化炭化水素若しくはその他の種々の油等を単独又は適宜
混合したものが一般的なものとして用いられている。ま
た、電気泳動粒子には、白色物として酸化チタンや硫酸
バリウム等が、そして、黄色物として上記の如き無機顔
料の他、幾つかの有機顔料等が隠蔽力の観点から優れた
ものとみられている。Examples of the dispersion medium used in the dispersion system of the electrophoretic display device include aromatic hydrocarbons, aliphatic hydrocarbons, alicyclic hydrocarbons, various esters, alcohol solvents, halogenated hydrocarbons, and other various kinds. The oils and the like are used alone or in a suitable mixture as general ones. Further, in the electrophoretic particles, titanium oxide or barium sulfate as a white substance, and as the yellow substance, in addition to the inorganic pigments described above, some organic pigments and the like are considered to be excellent in terms of hiding power. I have.
更に、電気泳動粒子の色とのコントラストを確保する
上で液体分散媒を種々の色に染める為に、油溶性染料や
分散染料等が使用される。また、液体分散媒を着色しな
い場合には、二種類の反対電荷を持つ電気泳動粒子を使
用するものもある。In addition, oil-soluble dyes, disperse dyes, and the like are used to dye the liquid dispersion medium into various colors in order to ensure contrast with the color of the electrophoretic particles. In addition, when the liquid dispersion medium is not colored, there is a method using electrophoretic particles having two kinds of opposite charges.
なお、電気泳動粒子の分散性改善、該泳動粒子の泳動
性即ち表示性の向上化或いは表示装置としての長期寿命
を確保する手段として、種々の界面活性材や各種添加剤
を分散系に添加される。As a means for improving the dispersibility of the electrophoretic particles, improving the electrophoretic properties of the electrophoretic particles, that is, improving the display property, or ensuring a long life as a display device, various surfactants and various additives are added to the dispersion system. You.
斯かる分散系を使用するこの種の電気泳動表示装置
は、第３図に示す如く、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使用して所要の表示用電
極パターン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べくスペーサ兼用
の封止部材５を外周部位に配装した構造を有するもので
あって、表示動作に際しては、電極パターン２、４に表
示駆動用電圧を印加して電気泳動粒子６を電極パターン
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
り、分散系７の光学的特性に変化を与えて所望の表示動
作を行なわせるものである。As shown in FIG. 3, this type of electrophoretic display device using such a dispersion system has indium oxide.
Two transparent glass plates 1 and 3 on which required display electrode patterns 2 and 4 were separately formed using an appropriate transparent conductive member such as tin were provided, and electrophoretic particles 6 were dispersed in a liquid dispersion medium. It has a structure in which a sealing member 5 also serving as a spacer is provided at an outer peripheral portion so as to enclose the dispersion system 7 between the opposing gaps. In a display operation, a display driving voltage is applied to the electrode patterns 2 and 4. By applying an electric field to the dispersion system 7 to change the distribution state of the electrophoresis particles 6 so that the electrophoretic particles 6 can be adsorbed and separated from the electrode patterns 2 and 4 by applying the voltage, the optical characteristics of the dispersion system 7 can be changed. A desired display operation is performed by giving a change.
分散系７の封入態様として上記の如く端部に設けた封
止部材５によって連続相状に構成する場合には、両電極
パターン２、４間の間隔むら等による電界強度の不均一
に起因して電気泳動粒子６が電極パターン面と平行方向
な移動を起こして電気泳動粒子の濃度分布に偏りを生
じ、その結果この電気泳動表示装置を長時間繰返し使用
すると電気泳動粒子の濃度が場所的に不均一になったり
表示むらを発生するという問題がある。In the case where the dispersion system 7 is formed in a continuous phase by the sealing member 5 provided at the end as described above, the dispersion system 7 is caused by non-uniform electric field strength due to uneven spacing between the two electrode patterns 2 and 4. As a result, the electrophoretic particles 6 move in a direction parallel to the electrode pattern surface, causing a bias in the concentration distribution of the electrophoretic particles. As a result, when the electrophoretic display device is used repeatedly for a long time, the concentration of the electrophoretic particles locally increases. There is a problem that the display becomes uneven or display unevenness occurs.
そこで、斯かる不都合を解消する為に、多数の透孔を
穿設した多孔性スペーサ８を用いて第３図の如く各透孔
に分散系を封入することにより、分散系７を小区間に不
連続相に分割封入するような構造も特開昭49-32038号、
特開昭59-34518号或いは特開昭59-171930号各公報等で
知られている。Therefore, in order to solve such inconvenience, the dispersion system is sealed in each through hole as shown in FIG. 3 by using a porous spacer 8 having a large number of through holes, so that the dispersion system 7 can be divided into small sections. JP-A-49-32038 also discloses a structure that is divided and enclosed in a discontinuous phase.
It is known in JP-A-59-34518 or JP-A-59-171930.
「発明が解決しようとする課題」 しかし、多孔性スペーサを用いて分散系を小区間に不
連続相に分割する分散系分割型の電気泳動表示装置の上
記公知例の場合に於いて、両電極板に基板フィルムを各
々使用する場合には、フィルムの変形等によって多孔性
スペーサと電極板間に隙間を生じ易いので、電気泳動粒
子の偏在を発生させる虞がある。また、双方ともガラス
板基材で両電極板を構成する場合には、表示用電極パタ
ーンの形成自体に起因する不要な疑似表示ともいうべき
事態の発生問題がある。即ち、この種の電極パターンは
表示目的に対応させて様々なパターンを以って電極板基
材に形成されるが、例えば第３図に例示的に示す如く、
隣接する電極パターン４のギャップ部材９には本来、電
界は何ら加わらないにも拘らず、繰返しの表示動作に伴
って該部位９に電気泳動粒子６が漸次的に移動滞留し、
これが電気泳動粒子６の色で恒常的な表示として視認さ
れるので、電気泳動表示装置としては実用上大きな障害
となる。[Problems to be Solved by the Invention] However, in the case of the above-described known example of the dispersion-type divisional electrophoretic display device in which the dispersion system is divided into small sections by using a porous spacer, When each of the substrate films is used as a plate, a gap is easily generated between the porous spacer and the electrode plate due to deformation of the film or the like, so that there is a possibility that uneven distribution of the electrophoretic particles may occur. Further, when both electrode plates are made of a glass plate base material, there is a problem that an unnecessary pseudo display caused by the formation of the display electrode pattern itself may occur. That is, this kind of electrode pattern is formed on the electrode plate base material with various patterns corresponding to the display purpose. For example, as shown in FIG.
Although no electric field is originally applied to the gap member 9 of the adjacent electrode pattern 4, the electrophoretic particles 6 gradually move and stay at the site 9 with the repeated display operation,
This is visually recognized as a permanent display in the color of the electrophoretic particles 6, which is a serious obstacle to the electrophoretic display device in practical use.
「発明の目的及び構成」 本発明は、電極板に於ける隣接電極パターン間のギャ
ップの存在による既述の如き不要な表示の発生を解消す
ることにより、表示性の優れた電気泳動表示装置を提供
することを主要な目的とするものである。"Object and Configuration of the Invention" The present invention provides an electrophoretic display device having excellent display performance by eliminating the occurrence of unnecessary display as described above due to the presence of a gap between adjacent electrode patterns on an electrode plate. Its primary purpose is to provide.
その為に本発明に係る電気泳動表示装置では、電気泳
動粒子を分散媒に分散させた分散系を対向電極板間に多
孔性スペーサの介装によって小区間に不連続相に分割し
て封入する形態の分散系分割型電気泳動表示装置に於い
て、少なくとも透明な表示側電極板に形成した隣接電極
パターン相互間のギャップが上記分散系の分割封入域に
位置しないように、両電極板の対向間隙と同等の厚さで
該ギャップ部位に好ましくは多孔性スペーサと一体形成
した隠蔽部を配設するように構成したことを要点とする
ものである。Therefore, in the electrophoretic display device according to the present invention, the dispersion system in which the electrophoretic particles are dispersed in the dispersion medium is divided into small sections into discrete phases and sealed by interposing porous spacers between the counter electrode plates. In the dispersion-type divided electrophoretic display device according to the aspect, at least the gap between the adjacent electrode patterns formed on the transparent display-side electrode plate is set so as not to be located in the divided enclosing area of the dispersion system. The main point is that a concealing portion which is preferably formed integrally with the porous spacer is disposed at the gap portion at a thickness equivalent to that of the gap.
「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。第１図に於いて、10は透明な表示側剛体電極板を
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
上面には酸スズ、酸化インジウム・スズ（ITO）等の透
明導電材料を用いて所要の電極パターン11を適宜形成し
てある。この剛体電極板の上面には、表示用分散系を小
区間に分割して封入する為に、膨潤質若しくは弾性質部
材からなる多孔性スペーサ12を配装してあり、更に、多
孔性スペーサ12の上面には、上記剛体電極板側の電極パ
ターン11と対向する面に他の電極パターン14を形成した
フィルム基材13を具備する可撓性電極板を配装してあ
る。該可撓性電極板は、上記多孔性スペーサ12の各孔に
過剰に供給した分散系７を可撓性電極板の上面から後述
の加圧力を作用させて該スペーサ12に密着させながら余
分な分散系７を順次押し出すと共に、可撓性電極板とス
ペーサ12の周囲との接合処理を行なうことによって、該
スペーサ12の各孔に空孔のない分散系７の完全な封入を
行なわせる為の構造として好適である。"Example" Hereinafter, the present invention will be described in more detail with reference to the illustrated example. In FIG. 1, reference numeral 10 denotes a transparent glass plate as a base material for forming a transparent display-side rigid electrode plate, and a transparent conductive material such as tin oxide or indium tin oxide (ITO) is provided on the upper surface thereof. The required electrode pattern 11 is appropriately formed using a material. On the upper surface of the rigid electrode plate, a porous spacer 12 made of a swellable or elastic member is provided in order to divide and enclose the display dispersion system into small sections. A flexible electrode plate including a film base 13 having another electrode pattern 14 formed on a surface facing the electrode pattern 11 on the rigid electrode plate side is provided on the upper surface of the substrate. The flexible electrode plate is provided with an excessively supplied dispersion system 7 in each hole of the porous spacer 12 from the upper surface of the flexible electrode plate by applying a pressing force, which will be described later, to the extra space. By sequentially extruding the dispersion system 7 and performing a bonding process between the flexible electrode plate and the periphery of the spacer 12, it is possible to completely enclose the dispersion system 7 having no holes in each hole of the spacer 12. It is suitable as a structure.
電極パターン14は共通の一様な電極で十分であるので
問題とならないが、表示側電極パターン11は、その一例
を第２図に示す如く、表示目的に応じて種々の態様でガ
ラス基材に形成されるが、いずれの場合でも、隣接する
電極パターン相互間には電極パターン分離の為にギャッ
プ部位11Aが様々な個所に形成されるが、このギャップ
部位11Aが分散系７の封入領域、即ち、多孔性スペーサ1
2の多孔部12Aの形成個所に位置すると、斯かる部位には
電気泳動粒子が漸次的に移動して表示切換え動作とは関
係なく恒常的に不要な表示として固定的に視認されるこ
ととなって、実用性を大きく阻害する。そこで、斯かる
事態を防止する手段として、このようなギャップ部位11
Aの形成個所には、多孔性スペーサ12と同等厚さで透明
又は分散系７の分散媒と同色の表示上不活性な部材で構
成したギャップ隠蔽部15を配設したものである。ここ
で、上記ギャップ部材11Aは第２図の如く、表示用電極
パターン11の外形線を取囲むように所要の狭い幅で連続
状に配設されるのが通常であるので、ギャップ隠蔽部15
についてもギャップ部位11Aのパターンに対応させて同
図の如く多孔性スペーサ12と一体的に形成するのが有利
である。The electrode pattern 14 does not pose a problem because a common uniform electrode is sufficient, but the display-side electrode pattern 11 may be formed on a glass substrate in various modes depending on the display purpose, as shown in FIG. In any case, gap portions 11A are formed in various places between adjacent electrode patterns for electrode pattern separation, and the gap portions 11A are formed in the sealing region of the dispersion system 7, that is, , Porous spacer 1
When located at the location where the second porous portion 12A is formed, the electrophoretic particles gradually move to such a portion, and are permanently and visually recognized as unnecessary display regardless of the display switching operation. This greatly impairs practicality. Therefore, as means for preventing such a situation, such a gap portion 11 is used.
A gap concealing portion 15 made of a transparent or inactive member of the same color as the transparent or dispersing medium of the dispersing system 7 and having the same thickness as the porous spacer 12 is provided at the portion where A is formed. Here, since the gap members 11A are usually arranged continuously with a required narrow width so as to surround the outline of the display electrode pattern 11, as shown in FIG.
It is also advantageous to form them integrally with the porous spacer 12 as shown in FIG.
上記の如く所要の多孔部12Aとギャップ隠蔽部15を有
する多孔性スペーサ12は、その構成部材として、スチレ
ン−ブタジエン系、イソブレン系、エチレン−プロピレ
ン系、アクリロニトリロ−ブタジエン系、クロロプレン
系の如き合成ゴムや天然ゴム又は低結晶性の各種樹脂等
からなる膨潤性に富む材料や、或いはシリコンゴム、ウ
レタイゴム、フッ素ゴム若しくは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弾性質部材を用意し、
それらのシート状成形物にパンチ又はレーザ等の適宜な
手段でギャップ隠蔽部15と共に所要の多孔部12Aを設け
たものを剛体電極板の電極パターン側に接合するか、或
いは斯かる膨潤質又は弾性質部材のスクリーン印刷手段
若しくはスプレー手段等で該電極パターン11側に直接一
体状に形成することも可能である。そして、斯かる多孔
性スペーサ12は、表示コントラストの向上を図る為に透
明質か又は分散系７の分散媒と同色に構成するのが好ま
しい。なお、第１図中、その他、16は可撓性電極板と該
スペーサ12との接着固定部であり、また、17はその為の
固定用溶着剤である。As described above, the porous spacer 12 having the required porous portion 12A and the gap concealing portion 15 is made of a synthetic rubber such as a styrene-butadiene-based, isobrene-based, ethylene-propylene-based, acrylonitrilo-butadiene-based, or chloroprene-based rubber. A material having high swelling properties such as natural rubber or various resins having low crystallinity, or an elastic member made of a material such as silicon rubber, urethane rubber, synthetic rubber such as fluorine rubber or acrylic rubber, or natural rubber,
The sheet-like molded product provided with a required porous portion 12A together with the gap concealing portion 15 by an appropriate means such as a punch or a laser is joined to the electrode pattern side of the rigid electrode plate, or the swelling or elastic material is used. It is also possible to directly form a unit on the electrode pattern 11 side by a screen printing means or a spray means of a property member. The porous spacer 12 is preferably made of a transparent material or of the same color as the dispersion medium of the dispersion system 7 in order to improve the display contrast. In addition, in FIG. 1, reference numeral 16 denotes an adhesive fixing portion between the flexible electrode plate and the spacer 12, and reference numeral 17 denotes a fixing welding agent therefor.
分散系７に用いる電気泳動粒子は、酸化チタンや周知
の各種のコロイド粒子の他、種々の有機、無機質顔料、
染料、セラミックス若しくは樹脂等の微粉末などを適宜
使用できる。また、分散系７の分散媒には、炭化水素、
ハロゲン化炭化水素、芳香族炭化水素等の他、天然又は
合成の各種の油等を任意使用できる。そして、分散系７
には必要ならば、電解質、界面活性剤、金属石けんの
他、樹脂、ゴム、油、ワニス、コンパウンド等の粒子か
らなる荷電制御剤に加え、分散剤、潤滑剤或いは安定化
剤等を適宜添加できる。更に、電気泳動粒子の荷電を正
又は負に統一したり、ゼータ電位を高める手段の他、電
気泳動粒子の電極パターン11及び14に対する吸着性や分
散媒の粘度等の調整も適宜行える。The electrophoretic particles used in the dispersion system 7 include various organic and inorganic pigments, in addition to titanium oxide and various known colloid particles.
Fine powders such as dyes, ceramics and resins can be used as appropriate. The dispersion medium of the dispersion system 7 includes a hydrocarbon,
In addition to halogenated hydrocarbons and aromatic hydrocarbons, various natural or synthetic oils and the like can be optionally used. And the dispersion system 7
If necessary, in addition to electrolytes, surfactants, metallic soaps, as well as charge control agents consisting of particles such as resins, rubbers, oils, varnishes, compounds, etc., appropriately add dispersants, lubricants or stabilizers, etc. it can. Furthermore, in addition to unifying the charge of the electrophoretic particles to be positive or negative, increasing the zeta potential, it is also possible to appropriately adjust the adsorptivity of the electrophoretic particles to the electrode patterns 11 and 14 and the viscosity of the dispersion medium.
一実施例に於いて、電気泳動粒子としては帝国化工
（株）製の600Bいからなる酸化チタン10g、分散媒にヘ
キシルベンゼン34g、着色染料として中央合成（株）製
のOBBAからなる油溶性青染料0.4g、そして、分散剤にソ
ルビタンセスキオレート15gを用意し、この配合成分を1
2時間ボールミル中で十分混合して表示用分散系７を予
め調製し、また、表示側電極板としては第２図の如きパ
ターン化した1.1mm厚さのITOガラス板を、そして裏面電
極板となる可撓性電極板には25μｍ厚さのITO PETフィ
ルムを夫々製作した。また、ITOガラス板上には、同図
のように、シリコンゴムのスクリーン印刷法で40μｍの
厚さで必要な多孔部12A及びギャップ隠蔽部15を形成し
た。In one embodiment, as electrophoretic particles, 10 g of titanium oxide made of 600B manufactured by Teikoku Chemicals Co., Ltd., 34 g of hexylbenzene as a dispersion medium, and an oil-soluble blue made of OBBA made by Chuo Gosei Co., Ltd. as a coloring dye. Prepare 0.4 g of dye and 15 g of sorbitan sesquiolate as a dispersant,
The dispersion system 7 for display was prepared in advance by sufficiently mixing in a ball mill for 2 hours, and a patterned ITO glass plate having a thickness of 1.1 mm as shown in FIG. On each of the flexible electrode plates, an ITO PET film having a thickness of 25 μm was manufactured. Further, on the ITO glass plate, the necessary porous portion 12A and gap concealing portion 15 having a thickness of 40 μm were formed by a silicon rubber screen printing method as shown in FIG.
次いで、第１図の如く可撓性電極板をその電極パター
ン14が剛体電極板の電極パターン11と対面するように多
孔性スペーサ12に重ね合わせた状態で可撓性電極板の上
面側に加熱ローラ等で順次押圧力を付与してこの可撓性
電極板を多孔性スペーサ12に密着させて多孔部12Aの各
孔から余分な分散系を押し出すと、分散系７の適正な封
入処理が行われる。そこで、ホットメルト等の接着固定
部16を利用して部材間を接着剤17で固定すると、多孔性
スペーサ12に未注入のない分割型分散系の完全な封入処
理と部材相互の接合処理とを容易迅速に施すことが出来
る。Next, as shown in FIG. 1, the flexible electrode plate is heated on the upper surface side of the flexible electrode plate in a state where the flexible electrode plate is superimposed on the porous spacer 12 so that the electrode pattern 14 faces the electrode pattern 11 of the rigid electrode plate. When a pressing force is sequentially applied by a roller or the like to bring the flexible electrode plate into close contact with the porous spacer 12 and push out an excess dispersion system from each hole of the porous portion 12A, an appropriate encapsulation process of the dispersion system 7 is performed. Will be Therefore, when the members are fixed with an adhesive 17 using an adhesive fixing portion 16 such as a hot melt, a complete encapsulation process of a split type dispersion system that is not injected into the porous spacer 12 and a bonding process between members are performed. It can be easily and quickly applied.
上記の如く製作した電気泳動表示装置の電極板間に直
流±50Vの電圧を反復的に印加してスイッチング試験を
行なったところ、電極パターン間のギャップ部位には酸
化チタンの集まりは認められず、良好な表示動作が得ら
れた。When a switching test was performed by repeatedly applying a voltage of ± 50 V DC between the electrode plates of the electrophoretic display device manufactured as described above, no aggregation of titanium oxide was observed in the gap portion between the electrode patterns, Good display operation was obtained.
「発明の効果」 本発明に係る電気泳動表示装置は、以上説明したとお
り、この種の分散系分割型の電気泳動表示装置に於い
て、透明な表示側電極板に形成される電極パターン相互
間のギャップが表示用分散系の分割封入域に位置しない
ように、対向する電極板の間隙と同等の厚さで該ギャッ
プ部位に設けたギャップ隠蔽部を備えるように構成した
ので、繰返し表示動作によってもギャップ部位に電気泳
動粒子が移動して不要表示を発生するという事態が好適
に解消され、視認性の良好な実用性に富む電気泳動表示
装置を提供できる。[Effects of the Invention] As described above, the electrophoretic display device according to the present invention can be used in a dispersion-type split electrophoretic display device of this type between electrode patterns formed on a transparent display-side electrode plate. In order to prevent the gap from being located in the divided enclosure area of the display dispersion system, a gap concealing portion provided at the gap portion with the same thickness as the gap between the opposing electrode plates is provided, so that repeated display operations are performed. In addition, the situation in which the electrophoretic particles move to the gap portion to generate unnecessary display is preferably eliminated, and a highly visible electrophoretic display device with good visibility can be provided.
従って、表示欠陥のないコントラストの良好な表示動
作を確保でき、また、繰返し表示動作に対する耐久性の
高い信頼性の良好な分散系の分割型電気泳動表示装置を
提供できる。Accordingly, it is possible to ensure a display operation with good display without display defects and to provide a highly reliable and reliable distributed electrophoretic display device with high durability against repeated display operations.
第１図は本発明の一実施例に従って隣接電極パターン間
のギャップによる不要な表示の防止機構を備えるように
構成した分散系分割型電気泳動表示装置の概念的な要部
拡大断面構成図、 第２図は剛体電極板の電極パターン側に形成したギャッ
プ隠蔽部を有する多孔性スペーサの配設態様説明図、そ
して、 第３図は従来の構造による分散系分割型電気泳動表示装
置の概念的断面構成図である。 1:透明ガラス板 2:電極パターン 3:透明ガラス板 4:電極パターン 5:端部スペーサ 6:電気泳動粒子 7:表示用分散系 10:透明ガラス板 11:電極パターン 11A:ギャップ部位 12:多孔性スペーサ 12A:スペーサの多孔部 13:フィルム基材 14:電極パターン 15:ギャップ隠蔽部 16:接着固定部 17:固定用接着剤FIG. 1 is a conceptual enlarged cross-sectional configuration view of a principal part of a dispersion-type divisional electrophoretic display device configured to have a mechanism for preventing unnecessary display due to a gap between adjacent electrode patterns according to an embodiment of the present invention. FIG. 2 is an explanatory view of an arrangement mode of a porous spacer having a gap concealing portion formed on an electrode pattern side of a rigid electrode plate, and FIG. 3 is a conceptual cross-section of a dispersion type electrophoretic display device having a conventional structure. It is a block diagram. 1: Transparent glass plate 2: Electrode pattern 3: Transparent glass plate 4: Electrode pattern 5: End spacer 6: Electrophoretic particles 7: Dispersion system for display 10: Transparent glass plate 11: Electrode pattern 11A: Gap portion 12: Porous Spacer 12A: Porous part of spacer 13: Film substrate 14: Electrode pattern 15: Gap concealing part 16: Adhesive fixing part 17: Adhesive for fixing
───────────────────────────────────────────────────── フロントページの続き (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 (72)発明者 尾城 達彦 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 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takashi Mori 757 Tenhoki, Kusazaki-cho, Inashiki-gun, Ibaraki Japan Nippon Mektron, Inc. KUTRON Co., Ltd. Minami-Ibaraki Factory
Claims (10)
た電極板間に電気泳動粒子を分散させた分散系を多孔性
スペーサにより小区間に不連続相に分割して封入し、該
電極板間に印加した表示制御用電圧の作用下に上記分散
系内の電気泳動粒子の分布状態を変えることによって光
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
為の電気泳動表示装置に於いて、少なくとも透明な上記
表示側電極板に形成した電極パターン相互間のギャップ
が上記分散系の分割封入域に位置しないように、上記両
電極板の対向間隙と同等の厚さで該ギャップ部位に設け
たギャップ隠蔽部を備えるべく構成したことを特徴とす
る電気泳動表示装置。1. A dispersion system in which electrophoretic particles are dispersed between a pair of opposedly disposed electrode plates, at least one of which is transparent, is divided into small sections by a porous spacer and sealed therein. An electrophoretic display device for changing the distribution state of the electrophoretic particles in the dispersion under the action of the display control voltage applied between them to change the optical reflection characteristics and perform the required display operation. In this case, at least the gap portion between the electrode patterns formed on the transparent display-side electrode plate has the same thickness as the opposed gap between the two electrode plates so that the gap between the electrode patterns is not located in the divided enclosing area of the dispersion system. An electrophoretic display device comprising: a gap concealing unit provided in the apparatus.
と一体に形成した請求項（１）の電気泳動表示装置。2. The electrophoretic display device according to claim 1, wherein said gap concealing portion is formed integrally with said porous spacer.
求項（１）の電気泳動表示装置。3. The electrophoretic display device according to claim 1, wherein the gap concealing portion is made transparent.
求項（２）の電気泳動表示装置。4. The electrophoretic display device according to claim 2, wherein said porous spacer is made transparent.
色に着色構成した請求項（２）の電気泳動表示装置。5. The electrophoretic display device according to claim 2, wherein the porous spacer is colored in the same color as the dispersion medium of the dispersion system.
色に着色構成した請求項（１）の電気泳動表示装置。6. The electrophoretic display device according to claim 1, wherein said gap concealing portion is colored in the same color as a dispersion medium of a dispersion system.
る膨潤質部材で構成した前記請求項のいずれかに記載の
電気泳動表示装置。7. The electrophoretic display device according to claim 1, wherein said porous spacer is formed of a swellable member which swells by a dispersion system.
成した前記請求項のいずれかに記載の電気泳動表示装
置。8. The electrophoretic display device according to claim 1, wherein said porous spacer is formed of an elastic member.
に、他方の電極板を可撓性に構成した前記請求項のいず
れかに記載の電気泳動表示装置。9. The electrophoretic display device according to claim 1, wherein said transparent electrode plate is made of a rigid material, and said other electrode plate is made of a flexible material.
共に、可撓性電極板がフィルム基材を備える請求項
（９）の電気泳動表示装置。10. The electrophoretic display device according to claim 9, wherein said rigid electrode plate comprises a glass substrate and said flexible electrode plate comprises a film substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1106808A JP2733686B2 (en) | 1989-04-26 | 1989-04-26 | Electrophoretic display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1106808A JP2733686B2 (en) | 1989-04-26 | 1989-04-26 | Electrophoretic display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02284127A JPH02284127A (en) | 1990-11-21 |
| JP2733686B2 true JP2733686B2 (en) | 1998-03-30 |
Family
ID=14443152
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1106808A Expired - Lifetime JP2733686B2 (en) | 1989-04-26 | 1989-04-26 | Electrophoretic display |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2733686B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5402145A (en) * | 1993-02-17 | 1995-03-28 | Copytele, Inc. | Electrophoretic display panel with arc driven individual pixels |
| JP5278284B2 (en) * | 2001-07-25 | 2013-09-04 | セイコーエプソン株式会社 | ELECTRO-OPTICAL DEVICE, ELECTRONIC DEVICE, COLORED LAYER FORMING METHOD, AND ELECTRONIC OPTICAL DEVICE MANUFACTURING METHOD |
-
1989
- 1989-04-26 JP JP1106808A patent/JP2733686B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02284127A (en) | 1990-11-21 |
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