JP2729299B2 - Electrophoretic display - Google Patents
Electrophoretic displayInfo
- Publication number
- JP2729299B2 JP2729299B2 JP63077031A JP7703188A JP2729299B2 JP 2729299 B2 JP2729299 B2 JP 2729299B2 JP 63077031 A JP63077031 A JP 63077031A JP 7703188 A JP7703188 A JP 7703188A JP 2729299 B2 JP2729299 B2 JP 2729299B2
- Authority
- JP
- Japan
- Prior art keywords
- display device
- electrophoretic display
- electrode
- electrophoretic
- thin film
- 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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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し、更
に具体的に云えば、表示駆動用電極の表面にフルオロシ
ランカップリング剤層を形成することにより、電気泳動
粒子の電極表面への付着を阻止して良好なコントラスト
を維持できるようにした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. More specifically, the present invention relates to a display device comprising: a display device ;
The present invention relates to an electrophoretic display device in which a run coupling agent layer is formed to prevent electrophoretic particles from adhering to an electrode surface and maintain good contrast.
「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、第３図に示すように、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を分散させ
てなる分散系５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６を外周部位に配装することにより基本
的には構成されるものであって、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を電極パターン
２、４に吸着・離反させ得るように分散系５に電界を作
用させて電気泳動粒子の分布状態を変えることにより分
散系５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。2. Description of the Related Art As shown in FIG. 3, this type of electrophoretic display device using electrophoretic particles has a required display by using a suitable transparent conductive member such as indium tin oxide on the opposing surfaces. Two transparent glass plates 1 and 3 in which electrode patterns 2 and 4 are separately formed, and a spacer 5 is also used as a spacer for enclosing a dispersion system 5 in which electrophoretic particles are dispersed in a liquid dispersion medium between the opposing gaps. This is basically constructed by disposing the sealing member 6 on the outer peripheral portion, and applies a display driving voltage to the electrode patterns 2 and 4 to attract the electrophoretic particles to the electrode patterns 2 and 4. An electric field is applied to the dispersion system 5 to change the distribution state of the electrophoretic particles so that the optical characteristics of the dispersion system 5 can be changed to perform a desired display operation.
分散系５の封入態様として上記の如く端部に設けた封
止部材６によって連続相状に構成する場合には、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
の為に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。そこで、上記の如き不
都合を解消する手段として、第４図に示すように、多数
の透孔を備えた有孔性スペーサ７を用いて各透孔に分散
系を封入することにより分散系５を小区間に不連続相に
分割するようにした構造も知られている。When the dispersion system 5 is formed in a continuous phase by the sealing member 6 provided at the end as described above, the dispersion system 5 may be formed in a non-uniform electric field intensity due to uneven spacing between the electrode patterns 2 and 4 and the like. The electrophoretic particles move in a direction parallel to the electrode pattern surface, causing a bias in the concentration distribution of the electrophoretic particles. For this reason, if the electrophoretic display device is used repeatedly for a long time, the concentration of the electrophoretic particles may not be spatially correct. There is a problem that the display becomes uniform or display unevenness occurs. Therefore, as means for solving the above-mentioned inconvenience, as shown in FIG. 4, the dispersion system 5 is formed by enclosing the dispersion system in each of the through holes using a porous spacer 7 having a large number of through holes. There is also known a structure in which a small section is divided into discontinuous phases.
このような電気泳動表示装置は、その広視野角や長期
メモリー性或は低消費電力等の特徴を有することから鋭
意研究されてきたが、それらは主に電気泳動粒子の液体
分散媒に対する分散性や分散系の安定化に関するものが
多く、それらの結果としてメモリー性、応答速度或は寿
命等を考察している。しかし、電気泳動粒子の分散性及
び分散系の安定性等の関する検討だけでは、電気泳動表
示装置の総合的な寿命を高めるうえでは不十分である。
例えば、有孔性スペーサを使用して分散系を上記の如く
小区間の不連続な分割型に構成したような分散系の分割
型電気泳動表示装置の場合であっても、電極パターンに
は徐々に電気泳動粒子の付着が進んでコントラストの低
下を生ずるので、電気泳動表示装置としての本来の性能
を発揮できないでいる等、電極表面の処理に関する検討
は未だ十分ではない。Such electrophoretic display devices have been studied intensively because of their characteristics such as a wide viewing angle, a long-term memory property, and low power consumption. However, they mainly disperse electrophoretic particles in a liquid dispersion medium. And stabilization of dispersed systems, and as a result, memory performance, response speed, life, etc. are considered. However, studies on the dispersibility of the electrophoretic particles and the stability of the dispersion system alone are not enough to increase the overall lifetime of the electrophoretic display device.
For example, even in the case of a dispersion type electrophoretic display device in which a dispersion system is configured to be a discontinuous division type of a small section as described above using a porous spacer, the electrode pattern is gradually formed on the electrode pattern. Since the adhesion of the electrophoretic particles progresses to lower the contrast, the original performance as an electrophoretic display device cannot be exhibited, and studies on the treatment of the electrode surface are not yet sufficient.
即ち、電極パターン２、４には、ネサ膜として酸化イ
ンジウム・スズ等の透明導電膜を一般的にに使用してい
るが、斯かる導電膜はいずれも金属酸化物であってその
表面張力は著しく大きく、従って界面活性剤によりステ
リックな凝集防止機能を有する顔料粒子等の電気泳動粒
子であっても、電界作用による表示動作の度に電極パタ
ーン表面に対する電気泳動粒子の衝突によってそのステ
リックな構成が損なわれるので、電極パターン表面に電
気泳動粒子が付着する事態を阻止することは容易ではな
い。That is, for the electrode patterns 2 and 4, a transparent conductive film such as indium oxide / tin oxide is generally used as a nesa film. However, such a conductive film is a metal oxide, and the surface tension thereof is low. Even electrophoretic particles such as pigment particles having a steric agglomeration preventing function due to a surfactant can have a steric structure due to the collision of the electrophoretic particles against the electrode pattern surface every time a display operation is performed by an electric field effect. It is not easy to prevent the electrophoretic particles from adhering to the surface of the electrode pattern because they are damaged.
そこで、電気泳動粒子の電極パターン表面に対する付
着防止の手法として、電極パターン表面に厚さ50Å以下
のポリイミドの薄膜からなる有機物層を形成する一方、
電気泳動粒子としては表面処理のしない純粋な酸化チタ
ンを使用し、斯かる純粋な酸化チタン表面の親水性とポ
リイミドの薄膜有機物層による疎水性との間で反発力を
持たせるようにした特開昭59-171931号公報の技術があ
る。Therefore, as a method of preventing adhesion of the electrophoretic particles to the electrode pattern surface, while forming an organic material layer consisting of a polyimide thin film having a thickness of 50 mm or less on the electrode pattern surface,
As the electrophoretic particles, a pure titanium oxide without surface treatment is used, and a repulsive force is provided between the hydrophilicity of the surface of the pure titanium oxide and the hydrophobicity of the polyimide thin film organic material layer. There is a technique disclosed in Japanese Patent Application Laid-Open No. 59-171931.
「発明が解決しようとする課題」 しかし、電気泳動粒子の電極パターン表面に対する上
記の如き付着防止手段では、ポリイミドからなる有機物
溶液をスピンナーの高速回転塗布法で行なうので、疎水
性有機物層の厚さを安定的に形成することは相当の困難
性がみられると共に、表示領域の大きな電極パターン表
面への塗布処理は益々困難となる。また、電気泳動粒子
としては表面処理を行なわない純粋な酸化チタンを使用
する必要から、酸化チタンの電荷を制御しその動作を安
定化する為に数種類の界面活性剤を調合することが必須
であり、然もこのような構成によっても電気泳動粒子の
付着防止効果は、表示切換回数で１万回程度で低下する
など、従来構造と比較した場合でも顕著であるとは云え
ない面がある。However, in the means for preventing adhesion of the electrophoretic particles to the electrode pattern surface as described above, since the organic material solution composed of polyimide is applied by a high-speed spin coating method of a spinner, the thickness of the hydrophobic organic material layer is reduced. There is considerable difficulty in stably forming, and the coating process on the electrode pattern surface having a large display area becomes more and more difficult. Since it is necessary to use pure titanium oxide without surface treatment as electrophoretic particles, it is essential to mix several types of surfactants to control the charge of titanium oxide and stabilize its operation. Of course, even with such a configuration, the effect of preventing the adhesion of the electrophoretic particles is reduced when the number of display switching operations is reduced to about 10,000, which is not remarkable even when compared with the conventional structure.
「課題を解決するための手段」 本発明は、上記の如く電極パターン表面に対する電気
泳動粒子の付着現象によってコントラストが低下する事
態を好適に解消して表示寿命を良好に高めることの可能
な電気泳動表示装置を提供するものである。[Means for Solving the Problems] The present invention is directed to an electrophoretic device capable of suitably eliminating the situation where the contrast is reduced due to the phenomenon of the electrophoretic particles adhering to the surface of the electrode pattern, thereby improving the display life. A display device is provided.
その為に、本発明によれば、電気泳動粒子を含む分散
系を少なくとも一方が透明な一組の対向電極板間にスペ
ーサを介して封入し、上記両電極板に印加した表示駆動
用電圧の作用下に上記電気泳動粒子を透明な上記電極板
側に吸着・離反させることにより所要の表示動作を行な
わせる電気泳動表示装置に於いて、上記電極板の電極パ
ターン面にフルオロシランカップリング剤の薄膜層を設
けるように構成したものである。このような薄膜層は電
極表面と化学的に強固に結合させて形成するのが可能で
あり、その厚さは数百Å以下、好ましくは百Å以下に形
成するものである。このような電極表面に対する処理構
造は、表示領域の大小に左右されず所要の厚さに安定的
に電極表面に容易に形成可能であって、電気泳動粒子の
付着防止効果は従来の構造に比較して格段に高いという
実用上の利点をもたらし、また、斯かる処理手段と分散
系分割の為の有孔性スペーサの併用とによってコントラ
ストの低下及び表示むら等を好適に阻止して寿命の長い
動作安定性の良好な電気泳動表示装置を提供することが
可能である。For this purpose, according to the present invention, at least one of the dispersion systems containing the electrophoretic particles is sealed between a pair of transparent electrode plates via a spacer, and the display driving voltage applied to the two electrode plates is reduced. In an electrophoretic display device in which a required display operation is performed by adsorbing and separating the electrophoretic particles on the transparent electrode plate side under operation, a fluorosilane coupling agent is applied to the electrode pattern surface of the electrode plate. It is configured to provide a thin film layer. Such a thin film layer can be formed by being chemically firmly bonded to the electrode surface, and has a thickness of several hundreds of mm or less, preferably 100 mm or less. Such a treatment structure for the electrode surface can be easily formed on the electrode surface stably at a required thickness regardless of the size of the display area, and the effect of preventing the adhesion of the electrophoretic particles is compared with the conventional structure. In addition, the use of such a processing means in combination with a porous spacer for dividing the dispersion system suitably prevents a decrease in contrast and display unevenness, thereby extending the life. An electrophoretic display device with good operation stability can be provided.
「作用」 フルオロシランカップリング剤の薄膜層は、電極表面
の表面張力を好適に低下させて電気泳動粒子の付着を阻
止する一方、そのフルオロシランカップリング剤薄膜層
の厚さを数百Å以下、好ましくは百Å以下に形成するこ
とによって、電極パターンの透明性及び導電度を損なう
ことなく所要の電気泳動表示動作を確実に行なわせるこ
とが可能となる。[Function] The thin film layer of the fluorosilane coupling agent suitably reduces the surface tension of the electrode surface to prevent the adhesion of the electrophoretic particles, while reducing the thickness of the thin film layer of the fluorosilane coupling agent to several hundreds of mm or less. By forming the electrode pattern preferably in a thickness of 100 mm or less, the required electrophoretic display operation can be reliably performed without impairing the transparency and conductivity of the electrode pattern.
「実施例」 以下、図に示す実施例を参照しながら本発明に係る電
気泳動表示装置を更に詳述すると、第１図に於いて、１
及び３は透明ガラス板、２及び４はその対向面に酸化イ
ンンジウム・スズ等の透明な導電部材を用いて各別に形
成した所要の電極パターン、６は端部封止部材であって
両電極パターン２、４間の間隙内に封入される分散系５
はそのまま広い連続相に構成するか、又は、多数の透孔
を形成した有孔性スペーサ７を使用することによって小
区間の不連続相に分割できるようにも構成できる。８は
各電極パターン２、４の表面にそれぞれ形成したフルオ
ロシランカップリング剤の薄膜層を示し、その厚さは数
百Å以下、好ましくは百Å以下に形成される。"Example" Hereinafter, the electrophoretic display device according to the present invention will be described in more detail with reference to an example shown in FIG.
Reference numerals 3 and 3 denote a transparent glass plate, reference numerals 2 and 4 denote required electrode patterns separately formed on their opposing surfaces using a transparent conductive member such as indium tin oxide, and reference numeral 6 denotes an end sealing member, which is a double electrode pattern. Dispersion system 5 enclosed in the gap between 2 and 4
Can be configured as it is in a wide continuous phase, or can be divided into a discontinuous phase in a small section by using a porous spacer 7 having a large number of through holes. Reference numeral 8 denotes a thin film layer of a fluorosilane coupling agent formed on the surface of each of the electrode patterns 2 and 4, and has a thickness of several hundreds of mm or less, preferably 100 mm or less.
一実施例に於いて、酸化インンジウム・スズで電極パ
ターン２、４を形成した透明ガラス板１、３を、第２図
の如く、一般式 CF3(CF2)7CH2CH2Si(OCH3)3 で示されるフルオロシランカップリング剤の２％メタノ
ール溶液９に約30分浸漬して各電極パターン２、４の表
面にフルオロシランカップリング剤薄膜層８を化学的に
結合形成した後、140℃で１時間加熱処理を施して厚さ
約30〜40Åの薄膜層８を得た。このようなフルオロシラ
ンカップリング剤の薄膜層８は、公知のフッ素系樹脂と
異なり、基材である電極表面の水酸基と化学反応して結
合するので電極表面との結合力に優れ且つ耐久性を備え
た薄膜層を形成できる。従って、このフルオロシランカ
ップリング剤の薄膜層８は、可及的に薄い塗膜を形成可
能であって然も電極の透明性及び導電性を損なう虞は無
く、電気泳動粒子への印加電界の低下も殆ど無視できる
ものである。In one embodiment, as shown in FIG. 2, transparent glass plates 1 and 3 having electrode patterns 2 and 4 formed of indium tin oxide were combined with a general formula CF 3 (CF 2 ) 7 CH 2 CH 2 S i ( After immersing in a 2% methanol solution 9 of a fluorosilane coupling agent represented by OCH 3 ) 3 for about 30 minutes to form a fluorosilane coupling agent thin film layer 8 on the surface of each of the electrode patterns 2 and 4 chemically. And a heat treatment at 140 ° C. for 1 hour to obtain a thin film layer 8 having a thickness of about 30 to 40 °. The thin film layer 8 of such a fluorosilane coupling agent, unlike a known fluororesin, chemically reacts with and binds to a hydroxyl group on the electrode surface as a base material, so that it has excellent bonding strength with the electrode surface and durability. Provided thin film layer can be formed. Therefore, the thin film layer 8 of the fluorosilane coupling agent can form a coating film as thin as possible, and does not impair the transparency and conductivity of the electrode. The drop is almost negligible.
このような電極表面処理を施したものを電極間ギャッ
プを90μｍに保持し、その間にトルエン40cc、酸化チタ
ン2g、界面活性剤0.4g及び青染料0.7gを用いて調製した
分散系を封入した上、１秒間オン表示、次の１秒間オフ
表示を±100Vの矩形波駆動電圧で繰返し表示試験を行な
ったところ、106回の連続スイッチング動作後でも電極
パターンに対する酸化チタンの付着は起らずコントラス
トの低下は認められなかった。比較の為に上記の如き電
極表面処理を施さなかったものについて同様な繰返し表
示試験を実施したところ、105回の連続スイッチング動
作の段階で電極パターンへの酸化チタンの付着が発生し
始めてコントラストの低下が認められた。After the electrode surface treatment was performed, the gap between the electrodes was maintained at 90 μm, and a dispersion prepared using 40 cc of toluene, 2 g of titanium oxide, 0.4 g of a surfactant, and 0.7 g of a blue dye was encapsulated therebetween. , one second on the display, was subjected to a repeated display test the next 1 second off display a rectangular wave drive voltage of ± 100 V, 10 6 times of contrast without Okoshira the deposition of titanium oxide with respect to the electrode patterns are formed after the continuous switching operation No decrease was observed. Was subjected to a similar repetitive display test for those not subjected to the above-mentioned electrode surface treatment for comparison, 10 5 times the titanium oxide in the continuous switching operation stage to the electrode pattern deposition is beginning to occur Contrast A decrease was observed.
従って、電極表面に対するフルオロシランカップリン
グ剤薄膜層による顕著な表示寿命促進効果が確認され
た。Therefore, fluorosilane coupling to the electrode surface
A remarkable display life promoting effect was confirmed by the agent thin film layer.
封止部材６は、フィルム材等の各種シート部材又はア
ルミナ、シリカ等の比較的均一な粒径を有する粒子を分
散させたエポキシ樹脂接着剤等を用いて所要の形状に形
成できる。The sealing member 6 can be formed into a required shape using various sheet members such as a film material or an epoxy resin adhesive in which particles having a relatively uniform particle size such as alumina and silica are dispersed.
また、分散系５を不連続相に小区間に分割する形態に
構成する場合には、その為の有孔性スペーサ７として
は、シリコンゴム、フッ素系ゴム等のゴム部材で適宜構
成できる膨潤質材料の他、トランスポリイソプレンゴ
ム、ノルボルネン系ポリマー若しくはエチレンプロピレ
ン系合成ゴム等の形状記憶機能を具備する各種のポリマ
ーの採用も好適である。Further, when the dispersion system 5 is configured to be divided into small sections into discontinuous phases, the porous spacer 7 for that purpose is formed of a swelling material that can be appropriately formed of a rubber member such as silicon rubber or fluorine rubber. In addition to the materials, it is also preferable to employ various polymers having a shape memory function, such as trans polyisoprene rubber, norbornene-based polymer, and ethylene-propylene-based synthetic rubber.
形状記憶部材を使用して各有孔性スペーサ７を構成す
る場合には、分散系５の注入処理後、熱等の昇温手段か
又は紫外線等の外部刺激作用を与えて有孔性スペーサ７
の厚さを復元させることによって、小区間に不連続相状
に分割した分散系５を構成できる。このような有孔性ス
ペーサ７は、既述の形状記憶ポリマーを使用してスクリ
ーン印刷又はスプレー手段等で多数の透孔を形成し得る
ように一方の電極パターン２上に直接的に形成するか、
若しくはシート状に成形したシリコンゴム等を用いて打
抜き或いはドリル加工等の手段で所要の透孔を多数形成
した後、熱プレス等の手段によりその厚さを両電極板の
所要間隙以下となるように適宜成形できる。When each of the porous spacers 7 is formed using a shape memory member, after the dispersing system 5 is injected, the porous spacers 7 are provided by a heating means such as heat or an external stimulating action such as ultraviolet rays.
By restoring the thickness of the dispersion system 5, the dispersion system 5 divided into small sections in a discontinuous phase can be configured. Such a porous spacer 7 is formed directly on one electrode pattern 2 so that a large number of through-holes can be formed by screen printing or spraying using the shape memory polymer described above. ,
Alternatively, after forming a large number of required through-holes by means such as punching or drilling using silicon rubber or the like formed into a sheet shape, the thickness is reduced to a required gap between the two electrode plates by means such as hot pressing. Can be appropriately molded.
有孔性スペーサ７の各透孔の形状は、角状又はスリッ
ト状等の他、円状や矩形状又は多角形状等任意に定める
ことができ、その配列も規則的又は不規則的に設けるこ
とができる。斯かる有孔性スペーサ７の厚さは、シリコ
ンゴム又は形状記憶ポリマーなど使用する膨潤質部材の
復元率、分散媒の組成や両電極板間の間隙等を考慮して
適宜選定できるものであるが、一般的は20μｍ〜1mm程
度に定めることができる。The shape of each through-hole of the porous spacer 7 can be arbitrarily determined, such as a square, a slit, or the like, or a circle, a rectangle, or a polygon, and the arrangement thereof is also regular or irregular. Can be. The thickness of the porous spacer 7 can be appropriately selected in consideration of the restoration rate of the swellable member used, such as silicon rubber or shape memory polymer, the composition of the dispersion medium, the gap between the two electrode plates, and the like. However, it can be generally set to about 20 μm to 1 mm.
分散系５に使用する電気泳動粒子は、周知の各種のコ
ロイド粒子のほか、種々の有機・無機質顔料、染料、金
属粉、ガラス若しくは樹脂等の微粉末などを適宜使用で
きる。また、分散系の分散媒としては、水、アルコール
類、炭化水素、ハロゲン化炭化水素等の他、天然又は合
成の各種の油などを任意使用できる。As the electrophoretic particles used in the dispersion system 5, various kinds of organic and inorganic pigments, dyes, metal powders, fine powders of glass or resin, and the like can be appropriately used in addition to various known colloidal particles. As the dispersion medium of the dispersion system, water, alcohols, hydrocarbons, halogenated hydrocarbons and the like, as well as various kinds of natural or synthetic oils can be used arbitrarily.
なお、分散系には必要に応じて、電解質や界面活性
剤、金属石けんのほか、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て、分散
剤、潤滑剤、安定化剤などを従来手法に従って適宜添加
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や分散を均一安定化する
手段のほか、電気泳動粒子の透明電極パターン２、４に
対する吸着性や分散媒の粘度等の調整も適宜行なうこと
が可能である。In addition, in addition to the electrolyte, surfactant, metal soap, and the charge control agent composed of particles such as resin, rubber, oil, varnish, and compound, the dispersant, lubricant, An agent and the like can be appropriately added according to a conventional method. Furthermore, in addition to unifying the charge of the electrophoretic particles to positive or negative, increasing the zeta potential, and stabilizing the dispersion, the adsorptivity of the electrophoretic particles to the transparent electrode patterns 2, 4 and the viscosity of the dispersion medium And the like can be appropriately adjusted.
「発明の効果」 以上のとおり、本発明に係る電気泳動表示装置は、電
極板の電極パターン面にフルオロシランカップリング剤
の薄膜層を設けるように構成したので、その電極パター
ン面の表面張力を好適に低下させて電気泳動粒子の付着
を阻止しながらコントラストを良好に維持して表示寿命
の優れた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 is configured such that the thin film layer of the fluorosilane coupling agent is provided on the electrode pattern surface of the electrode plate, so that the surface tension of the electrode pattern surface is reduced. It is possible to provide an electrophoretic display device having an excellent display life by maintaining a favorable contrast while suitably preventing the adhesion of the electrophoretic particles by preventing the electrophoretic particles from adhering.
フルオロシランカップリング剤の薄膜層は、上記電極
パターン面に化学的に薄く強固に結合できるので、透明
性及び導電度を損なうことなく長期にわたる表示動作の
耐久性を格段に高めることが可能である。 Since the thin film layer of the fluorosilane coupling agent can be chemically thinly and firmly bonded to the electrode pattern surface, the durability of the display operation over a long period of time can be remarkably enhanced without impairing the transparency and conductivity. .
表示領域の大小に左右されることなく電極パターン表
面にフルオロシランカップリング剤の薄膜層を所要の厚
さに均一に形成でき、従って大きな面積の表示装置にも
好適に対応であって、電気泳動粒子の付着防止効果を長
期にわたって安定に維持できる。The thin film layer of the fluorosilane coupling agent can be uniformly formed on the surface of the electrode pattern to a required thickness without being affected by the size of the display area, so that it is suitable for a display device having a large area. The effect of preventing adhesion of particles can be stably maintained over a long period of time.
上記電極パターン表面の処理構造と有孔性スペーサと
の併用によって更にサントラストの良好な高特性の電気
泳動表示装置を提供できる。The use of the electrode pattern surface treatment structure and the porous spacer in combination can provide a high-performance electrophoretic display device with a better sun trust.
第１図は本発明の一実施例に従った電気泳動表示装置の
概念的な要部断面構成図、 第２図は電極パターン面に化学的手法でフッ素系樹脂の
薄膜層を結合させる説明図、 第３図は従来の分散系連続相型電気泳動表示装置の概念
的な要部断面構成図、そして、 第４図は有孔性スペーサを備えた従来の分散系分割型電
気泳動表示装置の概念的な要部断面構成図である。 １、3:透明ガラス板 ２、4:電極パターン 5:分散系 6:端部封止部材 7:有孔性スペーサ 8:フルオロシランカップリング剤薄膜層FIG. 1 is a schematic cross-sectional view of a principal part of an electrophoretic display device according to an embodiment of the present invention, and FIG. 2 is an explanatory view in which a fluorine resin thin film layer is bonded to an electrode pattern surface by a chemical method. FIG. 3 is a conceptual cross-sectional view of a principal part of a conventional dispersion type continuous phase electrophoretic display device, and FIG. 4 is a diagram of a conventional dispersion type split type electrophoretic display device having a porous spacer. FIG. 3 is a conceptual cross-sectional configuration diagram of a principal part. 1, 3: transparent glass plate 2, 4: electrode pattern 5: dispersion system 6: end sealing member 7: porous spacer 8: fluorosilane coupling agent thin film layer
───────────────────────────────────────────────────── フロントページの続き (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 (56)参考文献 特開 昭55−6310（ＪＰ，Ａ) 特開 昭59−171931（ＪＰ，Ａ) ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Tatsuhiko Oshiro 757 Tenhoki, Kusazaki-cho, Inashiki-gun, Ibaraki Pref. 1984-1971931 (JP, A)
Claims (3)
方が透明な一組の対向電極板間にスペーサを介して封入
し、上記電極板に印加した表面駆動用電圧の作用下に上
記電気泳動粒子を透明な上記電極板側に吸着・離反させ
ることにより所要の表動作を行なわせる電気泳動表示装
置に於いて、上記電極板の電極パターン面に薄い塗膜に
形成可能であって該電極板の透明性及び導電性を損なわ
ないフルオロシランカップリング剤の薄膜層を設けるよ
うに構成したことを特徴とする電気泳動表示装置。A dispersion system containing electrophoretic particles is enclosed between a pair of counter electrode plates, at least one of which is transparent, via a spacer, and the electrophoresis is performed under the action of a surface driving voltage applied to the electrode plates. In an electrophoretic display device which performs a required table operation by adsorbing / separating particles to / from the transparent electrode plate side, a thin coating film can be formed on the electrode pattern surface of the electrode plate. An electrophoretic display device comprising a thin film layer of a fluorosilane coupling agent which does not impair the transparency and conductivity of the electrophoretic display device.
層が100Å以下の厚さに形成された請求項１に記載の電
気泳動表示装置。2. The electrophoretic display device according to claim 1, wherein the thin film layer of the fluorosilane coupling agent is formed to a thickness of 100 ° or less.
続相に分割する有孔性スペーサを含む請求項１又は２に
記載の電気泳動表示装置。3. The electrophoretic display according to claim 1, wherein the spacer includes a porous spacer that divides the dispersion system into small sections of a discontinuous phase.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63077031A JP2729299B2 (en) | 1988-03-30 | 1988-03-30 | Electrophoretic display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63077031A JP2729299B2 (en) | 1988-03-30 | 1988-03-30 | Electrophoretic display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01248182A JPH01248182A (en) | 1989-10-03 |
| JP2729299B2 true JP2729299B2 (en) | 1998-03-18 |
Family
ID=13622383
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63077031A Expired - Lifetime JP2729299B2 (en) | 1988-03-30 | 1988-03-30 | Electrophoretic display |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2729299B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8477404B2 (en) | 2008-09-25 | 2013-07-02 | Fuji Xerox Co., Ltd. | Display medium and display device |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5187609A (en) * | 1991-03-27 | 1993-02-16 | Disanto Frank J | Electrophoretic display panel with semiconductor coated elements |
| US6120588A (en) * | 1996-07-19 | 2000-09-19 | E Ink Corporation | Electronically addressable microencapsulated ink and display thereof |
| US6017584A (en) * | 1995-07-20 | 2000-01-25 | E Ink Corporation | Multi-color electrophoretic displays and materials for making the same |
| US8040594B2 (en) | 1997-08-28 | 2011-10-18 | E Ink Corporation | Multi-color electrophoretic displays |
| WO2000003291A1 (en) | 1998-07-08 | 2000-01-20 | E Ink Corporation | Methods for achieving improved color in microencapsulated electrophoretic devices |
| US20050156340A1 (en) | 2004-01-20 | 2005-07-21 | E Ink Corporation | Preparation of capsules |
| US6982178B2 (en) | 2002-06-10 | 2006-01-03 | E Ink Corporation | Components and methods for use in electro-optic displays |
| JP4092903B2 (en) | 2001-11-05 | 2008-05-28 | セイコーエプソン株式会社 | Electrophoresis device, method of manufacturing electrophoresis device, electronic device |
| EP3056941B1 (en) | 2002-09-03 | 2019-01-09 | E Ink Corporation | Electro-phoretic medium |
| JP5211556B2 (en) * | 2007-06-14 | 2013-06-12 | 富士ゼロックス株式会社 | Display medium and display device |
| TWI484275B (en) | 2010-05-21 | 2015-05-11 | E Ink Corp | Electro-optic display, method for driving the same and microcavity electrophoretic display |
| JP5234077B2 (en) | 2010-09-22 | 2013-07-10 | 富士ゼロックス株式会社 | Display medium and display device |
| JP5392394B2 (en) * | 2012-11-12 | 2014-01-22 | 富士ゼロックス株式会社 | Display medium and display device |
| JP6601660B2 (en) * | 2014-09-12 | 2019-11-06 | Ｔｉａｎｍａ Ｊａｐａｎ株式会社 | OPTICAL ELEMENT AND DISPLAY DEVICE, ELECTRONIC DEVICE, AND LIGHTING DEVICE USING SAME |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS556310A (en) * | 1978-06-27 | 1980-01-17 | Seiko Epson Corp | Electrophoresis display device |
-
1988
- 1988-03-30 JP JP63077031A patent/JP2729299B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8477404B2 (en) | 2008-09-25 | 2013-07-02 | Fuji Xerox Co., Ltd. | Display medium and display device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01248182A (en) | 1989-10-03 |
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