JPH02284128A - Electrophoresis display device and dispersion system for display thereof - Google Patents
Electrophoresis display device and dispersion system for display thereofInfo
- Publication number
- JPH02284128A JPH02284128A JP1106809A JP10680989A JPH02284128A JP H02284128 A JPH02284128 A JP H02284128A JP 1106809 A JP1106809 A JP 1106809A JP 10680989 A JP10680989 A JP 10680989A JP H02284128 A JPH02284128 A JP H02284128A
- Authority
- JP
- Japan
- Prior art keywords
- dispersion system
- electrophoretic
- electrophoretic display
- fatty acid
- acid ester
- 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
- 239000006185 dispersion Substances 0.000 title claims description 46
- 238000001962 electrophoresis Methods 0.000 title abstract 6
- 239000002245 particle Substances 0.000 claims abstract description 45
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 18
- 235000014113 dietary fatty acids Nutrition 0.000 claims abstract description 18
- 239000000194 fatty acid Substances 0.000 claims abstract description 18
- 229930195729 fatty acid Natural products 0.000 claims abstract description 18
- -1 sorbitan fatty acid ester Chemical class 0.000 claims abstract description 18
- 239000007822 coupling agent Substances 0.000 claims abstract description 17
- 239000004094 surface-active agent Substances 0.000 claims abstract description 9
- JNYAEWCLZODPBN-JGWLITMVSA-N (2r,3r,4s)-2-[(1r)-1,2-dihydroxyethyl]oxolane-3,4-diol Chemical compound OC[C@@H](O)[C@H]1OC[C@H](O)[C@H]1O JNYAEWCLZODPBN-JGWLITMVSA-N 0.000 claims abstract description 6
- IEKHISJGRIEHRE-UHFFFAOYSA-N 16-methylheptadecanoic acid;propan-2-ol;titanium Chemical compound [Ti].CC(C)O.CC(C)CCCCCCCCCCCCCCC(O)=O.CC(C)CCCCCCCCCCCCCCC(O)=O.CC(C)CCCCCCCCCCCCCCC(O)=O IEKHISJGRIEHRE-UHFFFAOYSA-N 0.000 claims abstract description 5
- 125000006850 spacer group Chemical group 0.000 claims description 24
- 239000012756 surface treatment agent Substances 0.000 claims description 8
- 238000009826 distribution Methods 0.000 claims description 6
- 239000002612 dispersion medium Substances 0.000 claims description 5
- 239000005083 Zinc sulfide Substances 0.000 claims description 4
- 229910052984 zinc sulfide Inorganic materials 0.000 claims description 4
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 claims description 4
- 230000003287 optical effect Effects 0.000 claims description 2
- 150000004996 alkyl benzenes Chemical class 0.000 claims 1
- 239000011521 glass Substances 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 239000003921 oil Substances 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 238000004062 sedimentation Methods 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- LTEQMZWBSYACLV-UHFFFAOYSA-N Hexylbenzene Chemical compound CCCCCCC1=CC=CC=C1 LTEQMZWBSYACLV-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 239000000975 dye Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 150000004945 aromatic hydrocarbons Chemical class 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 150000008282 halocarbons Chemical class 0.000 description 1
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000001023 inorganic pigment Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000012860 organic pigment Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
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
- G02F1/165—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 translational movement of particles in a fluid under the influence of an applied field
- G02F1/166—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 translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect
- G02F1/167—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 translational movement of particles in a fluid under the influence of an applied field characterised by the electro-optical or magneto-optical effect by electrophoresis
Abstract
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及びその表示
用分散系に関する。更に具体的に云えば、電気泳動粒子
の表面処理剤としてチタネートカップリング剤及びソル
ビタン脂肪酸エスチル界面活性剤の両者を効果的に用い
ることにより、電気泳動粒子の凝集を防止する一方、該
粒子の電界による動きに良好な影響を与えながら電気泳
動粒子の電極への付着或いは沈降等のない表示性の優れ
た電気泳動表示用分散系及びこの分散系を使用した電気
泳動表示装置に関する。DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a display device using electrophoretic particles and a display dispersion system thereof. More specifically, by effectively using both a titanate coupling agent and a sorbitan fatty acid ester surfactant as a surface treatment agent for electrophoretic particles, agglomeration of electrophoretic particles can be prevented, while the electric field of the particles can be reduced. The present invention relates to a dispersion system for electrophoretic display that has excellent display performance without adhesion or sedimentation of electrophoretic particles to electrodes while having a good effect on the movement of electrophoretic particles, and an electrophoretic display device using this dispersion system.
「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ーン
２．４を各別に形成した二枚の透明ガラス板ｌ、３を製
作し、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。"Prior art" This type of electrophoretic display device using electrophoretic particles is
As shown in Fig. 3, two transparent glass plates 1 and 3 are fabricated, each having a required display electrode pattern 2.4 formed on the opposite surface using a suitable transparent conductive material such as indium tin oxide. , which has a structure in which a sealing member 5 which also serves as a spacer is disposed on the outer periphery in order to seal a dispersion system 7 in which electrophoretic particles 6 are dispersed in a liquid dispersion medium into the gap between the opposing sides.
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。During the display operation, a display driving voltage is applied to the electrode pattern 2.4, and an electric field is applied to the dispersion system 7 so that the electrophoretic particles 6 can be attracted to and separated from the electrode pattern 2.4. By changing the distribution state of the dispersion system 7, the optical characteristics of the dispersion system 7 are changed to perform a desired display operation.
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１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。When the dispersion system 7 is enclosed in a continuous phase with the sealing member 5 provided at the end as described above, the dispersion system 7 may be enclosed due to unevenness in electric field strength due to uneven spacing between the two electrode patterns 2, 4, etc. 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 this electrophoretic display device is repeatedly used for a long time, there is a problem that the concentration of electrophoretic particles becomes uneven in places and display unevenness occurs.
そこで、斯かる不都合を解消する為に、第４図の如く、
多数の透孔を穿設した多孔性スペーサ８を用いて各透孔
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構造も特開昭４９−３２０３８号
、特開昭５９−３４５１８号或いは特開昭５９−１７１
９３０号各公報等丁番られている。Therefore, in order to eliminate such inconvenience, as shown in Figure 4,
JP-A-49-32038 also discloses a structure in which the dispersed system 7 is divided and enclosed in small sections into discontinuous phases by using a porous spacer 8 with a large number of through holes and enclosing the dispersed system in each hole. , JP-A-59-34518 or JP-A-59-171
No. 930, each publication, etc. are numbered.
［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、両型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
基材で両型極板を構成する場合には、ガラス板の平面性
と多孔性スペーサ８の厚みの分布の関係により。[Problem to be Solved by the Invention] However, in the case of the above-mentioned known example of a dispersion-divided electrophoretic display device in which a porous spacer is used to divide a dispersion system into small sections into discontinuous phases, both types When a substrate film is used for each electrode plate, a gap is likely to be formed between the porous spacer and the electrode plate due to deformation of the film, etc., which may cause uneven distribution of electrophoretic particles. In addition, when both types of electrode plates are constructed using glass plate base materials, it depends on the relationship between the flatness of the glass plate and the thickness distribution of the porous spacer 8.
多孔性スペーサ８と電極板間に隙間を残す部分を発生す
るので、このような構造でも電気泳動粒子の偏在を防止
することは容易ではない。Since a gap is left between the porous spacer 8 and the electrode plate, even with this structure, it is not easy to prevent uneven distribution of electrophoretic particles.
更に、両型極板と介装多孔性スペーサとを予め接着した
セル構造のものでは、多孔性スペーサの多孔に分散系を
一様に注入することは非常に困難である等、分散系注入
処理に伴なう製造上の難点が種々存在する他、分散系注
入の不完全な部分が発生して表示欠陥となる虞が多分に
あり、信頼性の高い表示装置を得る上での解決課題は多
い。Furthermore, with a cell structure in which a bipolar plate and an intervening porous spacer are bonded in advance, it is extremely difficult to uniformly inject the dispersion system into the pores of the porous spacer, and the dispersion system injection process is difficult. In addition to various manufacturing difficulties associated with this process, there is also a high possibility that incomplete dispersion injection may occur, resulting in display defects. many.
そこで、対向電極板の一方を剛体に、その他方を可撓性
に夫々構成することによって、表示装置の構造上の強度
を確保し、且つ電極板と多孔性スペーサとの密着を可能
にしながら、該スペーサの多孔に表示用分散系を良好に
封入し得る構造並びに手法を本願の出願人は先に提供し
たが、例えばこのような表示装置を縦置きに設置してス
イッチング試験を行ってみると、電気泳動粒子が電極パ
ターンに付着したり、また、ある種の分散系では電極パ
ターンに付着しないものの、多孔性スペーサの多孔の下
方部に電気泳動粒子が沈殿するという現象が発生する等
、この種の電気泳動表示装置の設置使用態様に伴う表示
用分散系の安定性乃至は表示動作の耐久性等に関する改
善事項は実用面からみて十分に検討する必要がある。Therefore, by configuring one of the opposing electrode plates to be rigid and the other to be flexible, the structural strength of the display device can be ensured, and the electrode plate and the porous spacer can be closely attached. The applicant of the present application has previously provided a structure and method that can satisfactorily encapsulate a display dispersion system in the pores of the spacer, but for example, when a switching test is performed with such a display device installed vertically, , electrophoretic particles may adhere to the electrode pattern, or in some dispersion systems, electrophoretic particles may precipitate below the pores of a porous spacer, although they do not adhere to the electrode pattern. Improvements regarding the stability of display dispersion systems, the durability of display operations, etc., depending on the manner in which electrophoretic display devices are installed and used, need to be thoroughly studied from a practical standpoint.
「発明の目的及び構成」
本発明は、上記の如き諸問題を解消する有力な手段とし
て、表示用分散系の電気泳動粒子の表面処理剤として、
チタネートカップリング剤並びにソルビタン脂肪酸エス
テル界面活性剤の双方を用いることにより、電極パター
ンに対する電気泳動粒子の付着や沈降等の事態を効果的
に防止し得る表示用分散系及びこれを用いた電気泳動表
示装置を提供することを目的とするものである。``Object and Structure of the Invention'' The present invention provides a surface treatment agent for electrophoretic particles in a dispersion system for display, as an effective means for solving the above-mentioned problems.
A dispersion system for display that can effectively prevent situations such as adhesion and sedimentation of electrophoretic particles to an electrode pattern by using both a titanate coupling agent and a sorbitan fatty acid ester surfactant, and an electrophoretic display using the same. The purpose is to provide a device.
上記の如きチタネートカップリング剤としてはイソプロ
ピルトリイソステアロイルチクネートが、また、ソルビ
タン脂肪酸エステル界面活性剤にはソルビタンセスキオ
レートが各々好ましく、その為の電気泳動粒子の表面処
理剤による処理法としては、チタネートカップリング剤
で先ず処理した後、ソルビタン脂肪酸エステルで処理す
ることにより一層の著効が得られる。即ち、チタネート
カップリング剤を溶剤に溶かして得た溶解液中に、所要
の電気泳動粒子を浸漬混合して十分に反応させた後、溶
剤を蒸発させ、次いでソルビタン脂肪酸エステルを予め
混入した分散液中に斯かる処理済み電気泳動粒子を添加
するか、若しくは分散液中にチタネートカップリング剤
を添加したものに電気泳動粒子を浸漬・混合して十分反
応させた後、これにソルビタン脂肪酸エステルを添加す
る手法が好適である。チタネートカップリング剤並びに
ソルビタン脂肪酸エステルの添加量は、電気泳動粒子に
対して、前者が０．５〜ｌＯ重量％で、また、後者が５
〜２０重量％であることが好ましい。As the titanate coupling agent mentioned above, isopropyltriisostearoyl tichnate is preferred, and as the sorbitan fatty acid ester surfactant, sorbitan sesquiolate is preferred, and the method for treating electrophoretic particles with a surface treatment agent for this purpose is as follows: Even more effective results can be obtained by first treating with a titanate coupling agent and then treating with a sorbitan fatty acid ester. That is, the required electrophoretic particles are immersed and mixed in a solution obtained by dissolving a titanate coupling agent in a solvent, and after sufficiently reacting, the solvent is evaporated, and then a dispersion in which sorbitan fatty acid ester is mixed in advance is prepared. The treated electrophoretic particles are added thereto, or the electrophoretic particles are immersed and mixed in a dispersion containing a titanate coupling agent and reacted sufficiently, and then sorbitan fatty acid ester is added thereto. The preferred method is to The amount of the titanate coupling agent and sorbitan fatty acid ester added is 0.5 to 10% by weight of the former and 5% by weight of the latter with respect to the electrophoretic particles.
It is preferably 20% by weight.
「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、ｌＯ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
上面には酸化スズ、酸化インジウム・スズ等の透明導電
材料を用いて所要の電極パターン１１を適宜形成しであ
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の多孔性スペーサ１２を配装して
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からなる可撓性電極板
を配装しである。この可撓性電極板は、上記多孔性スペ
ーサ１２の名札１２Ｂに過剰に供給した分散系７を可撓
性電極板の上面から図の如き鋼製ローラ１６の使用によ
る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を順次的に押し出すと共に、可撓性電
極板とスペーサ１２の周囲の接着層１２Ａとの接合処理
を接着剤１５を用いて行なうことによって、該スペーサ
１２の名札に空孔のない分散系７の良好な封入処理を施
すことが出来る。"Examples" The present invention will be described in further detail below with reference to illustrated embodiments. In Figure 1, IO is a transparent glass plate used as a base material for constructing a transparent display-side rigid electrode plate, and its upper surface is made of a transparent conductive material such as tin oxide or indium tin oxide. Then, a required electrode pattern 11 is formed as appropriate. A porous spacer 12 for dividing and enclosing the display dispersion system into small sections is arranged on the upper surface of this rigid electrode plate. A flexible electrode plate made of a film base material 13 on which another electrode pattern 14 is formed on the surface facing the electrode pattern 11 is arranged. This flexible electrode plate is made by applying a pressing force using a steel roller 16 as shown in the figure to the dispersion system 7 supplied in excess to the name plate 12B of the porous spacer 12 from the upper surface of the flexible electrode plate. While the spacer 12 is in close contact with the spacer 12, the excess dispersion system 7 is sequentially extruded, and the flexible electrode plate and the adhesive layer 12A around the spacer 12 are bonded using the adhesive 15. 12 name tags can be subjected to a good encapsulation treatment of the dispersion system 7 without pores.
分散系７に用いる電気泳動粒子は、硫化亜鉛が好適であ
るが、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可
能である。The electrophoretic particles used in the dispersion system 7 are preferably zinc sulfide, but in addition to titanium oxide and various well-known colloidal particles, various organic and inorganic pigments, dyes, fine powders of ceramics, resins, etc. can be used as appropriate. can. Further, as the dispersion medium of the dispersion system 7, in addition to hydrocarbons, halogenated hydrocarbons, aromatic hydrocarbons, etc., various natural or synthetic oils can be optionally used.
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。If necessary, the dispersion system 7 may contain an electrolyte, a surfactant, a metal soap, a charge control agent consisting of particles of resin, rubber, oil, varnish, compound, etc., as well as a dispersant, a lubricant, or a stabilizing agent. Agents etc. can be added as appropriate. Furthermore, in addition to means for unifying the charge of the electrophoretic particles to positive or negative or increasing the zeta potential, electrode patterns 11 and 14 of the electrophoretic particles can be used.
It is also possible to adjust the adsorption properties and the viscosity of the dispersion medium as appropriate.
一実施例に於いて、電気泳動粒子に硫化亜鉛を１０ｇ
、チタネートカップリング剤として味の素■製のＫＲＴ
ＴＳからなるイソブロビルトリイソステアロイルチタネ
−１−０，５ｇ、ソルビタン脂肪酸エステルにはソルビ
タンセスキオレートを２ｇ、着色染料に中央合成■製の
オイルプル＝ＢＡを０．４ｇ、そして、分散媒にヘキシ
ルベンゼン３４ｇを各々分散系配合成分として用意した
。In one example, 10 g of zinc sulfide was added to the electrophoretic particles.
, KRT manufactured by Ajinomoto as a titanate coupling agent.
1-0.5 g of isobrobyl triisostearoyl titanate consisting of TS, 2 g of sorbitan sesquiolate for the sorbitan fatty acid ester, 0.4 g of oil pull = BA manufactured by Chuo Gosei ■ for the coloring dye, and hexyl as the dispersion medium. 34 g of benzene was prepared as each component of the dispersion system.
先ず、ヘキシルベンゼン中にイソプロピルトリイソステ
アロイルチタネート０．５ｇを添加・撹拌後、１５０℃
の温度で２時間に亘って予め乾燥した硫化亜鉛を添加し
、これを１２時間ボールミル中で十分に分散させた０次
いで、ソルビタンセスキオレートを２ｇ添加して更に１
時間ボールミルで分散させた後、オイルブルーＢＡを０
．４ｇを添加して最終的に１時間ボールミル中で十分に
分散させて分散系を調製した。First, 0.5 g of isopropyl triisostearoyl titanate was added to hexylbenzene, stirred, and heated to 150°C.
Pre-dried zinc sulfide was added for 2 hours at a temperature of
After dispersing in a ball mill for an hour, add 0 oil blue BA.
．． A dispersion system was prepared by adding 4 g and finally thoroughly dispersing it in a ball mill for 1 hour.
この表示用分散系を上記の如き手法で封入した電気泳動
表示装置を縦に設置し、その電極板間に直流電圧を反復
的に印加してスイッチング試験を行なったところ、 １
００万回のスイッチング後でも電極パターンに対する電
気泳動粒子の付着や沈降等はなく、良好な表示動作を維
持した。An electrophoretic display device containing this display dispersion system as described above was installed vertically, and a switching test was conducted by repeatedly applying a DC voltage between the electrode plates.1
Even after switching 1,000,000 times, there was no adhesion or sedimentation of electrophoretic particles to the electrode pattern, and good display operation was maintained.
「発明の効果」
本発明に係る電気泳動表示装置とその為に用いる表示用
分散系は、以上のとおり、表示用分散系の電気泳動粒子
の表面処理剤として、好ましくはイソプロピルトリイソ
ステアロイルチタネートからなるチタネートカップリン
グ剤並びに同じく好ましくはソルビタンセスキオレート
からなるソルビタン脂肪酸エステルの双方を使用し、し
かも望ましくは電気泳動粒子を先ず上記チタネートカッ
プリング剤で初段の処理を施した後、次段の処理として
ソルビタン脂肪酸エステルを適量添加する手法の採用に
よって、電極パターンに対する電気泳動粒子の付着や沈
降等の事態を確実に防止可能な表示用分散系を構成でき
る。"Effects of the Invention" As described above, the electrophoretic display device according to the present invention and the display dispersion system used therefor are preferably made from isopropyl triisostearoyl titanate as a surface treatment agent for the electrophoretic particles of the display dispersion system. and a sorbitan fatty acid ester, which is also preferably composed of sorbitan sesquiolate, and preferably, the electrophoretic particles are first treated with the titanate coupling agent, and then as a second treatment. By adopting a method of adding an appropriate amount of sorbitan fatty acid ester, it is possible to construct a dispersion system for display that can reliably prevent situations such as adhesion and sedimentation of electrophoretic particles to the electrode pattern.
そして、斯かる安定な表示用分散系を用いてこれを剛体
電極板と可撓性電極板との間に封入した電気泳動表示装
置を提供することが出来る。Then, it is possible to provide an electrophoretic display device in which such a stable display dispersion system is encapsulated between a rigid electrode plate and a flexible electrode plate.
従って、設置使用態様に拘らず、繰返しの表示動作に対
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。Therefore, regardless of the installation and use mode, it is possible to provide a dispersion-type split electrophoretic display device that is highly durable and reliable against repeated display operations.
第１図は本発明の一実施例に従って電気泳動粒子の表面
処理剤として、イソプロピルトリイソステアロイルチタ
ネートからなるチタネートカップリング剤並びにソルビ
タンセスキオレートからなるソルビタン脂肪酸エステル
の双方を使用して電気泳動粒子を処理することにより、
電極パターンに対する付着や沈殿等のない安定した電気
泳動表示用分散系を多孔性スペーサを介して剛体電極板
と可撓性電極板との間に封入処理する態様の説明図、
第２図は上記分散系分割型電気泳動表示装置に使用した
多孔性スペーサの要部拡大部分平面構成図、
第３図は多孔性スペーサを・使用しない従来の構造の電
気泳動表示装置の概念的断面構成図であり、そして、
第４図は多孔性スペーサを使用した従来構造の分散系分
割型電気泳動表示装置の概念的断面構成図である。
ｌ ：
２ ：
３ ：
４ ：
５ ：
６ ニ
ア ：
ｌ Ｏ：
１ ｌ ：
ｌ ２ ：
１２Ａ：
１２Ｂ：
ｌ ３ ：
ｌ ４ ：
ｌ ５ ：
ｌ ６ ：
透明ガラス板
電極パターン
透明ガラス板
電極パターン
端部スペーサ
電気泳動粒子
表示用分散系
透明ガラス板
電極パターン
多孔性スペーサ
スペーサの接着層
スペーサの透孔
フ ィ ル ム 基 相
電極パターン
固定用接着剤
加 圧 口 − ラ
第１図
第FIG. 1 shows electrophoretic particles prepared using both a titanate coupling agent consisting of isopropyl triisostearoyl titanate and a sorbitan fatty acid ester consisting of sorbitan sesquiolate as a surface treatment agent for electrophoretic particles according to an embodiment of the present invention. By processing,
An explanatory diagram of a mode in which a stable dispersion system for electrophoretic display without adhesion or precipitation to the electrode pattern is sealed between a rigid electrode plate and a flexible electrode plate via a porous spacer. FIG. 3 is an enlarged partial plan configuration diagram of the essential parts of a porous spacer used in a dispersed type electrophoretic display device. FIG. , and FIG. 4 is a conceptual cross-sectional diagram of a dispersion type electrophoretic display device having a conventional structure using porous spacers. l: 2: 3: 4: 5: 6 Near: l O: 1 l: l2: 12A: 12B: l3: l4: l5: l6: Transparent glass plate electrode pattern End of transparent glass plate electrode pattern Spacer Dispersed transparent glass plate electrode pattern for displaying electrophoretic particles Porous spacer Adhesive layer of spacer Perforated film of spacer Base Adhesive for fixing electrode pattern Pressure opening - La Figure 1
Claims (7)
剤として、チタネートカップリング剤及びソルビタン脂
肪酸エステル界面活性剤の双方を含む電気泳動表示用分
散系。(1) A dispersion system for electrophoretic display containing both a titanate coupling agent and a sorbitan fatty acid ester surfactant as a surface treatment agent for electrophoretic particles in the dispersion system for electrophoretic display.
ソステアロイルチタネートであり、ソルビタン脂肪酸エ
ステル界面活性剤がソルビタンセスキオレートである請
求項（１）の電気泳動表示用分散系。(2) The dispersion system for electrophoretic display according to claim (1), wherein the titanate coupling agent is isopropyl triisostearoyl titanate, and the sorbitan fatty acid ester surfactant is sorbitan sesquiolate.
２）の電気泳動表示用分散系。(3) Claims (1) to (3) wherein the electrophoretic particles are zinc sulfide.
2) Dispersion system for electrophoretic display.
請求項（１）〜（３）の電気泳動表示用分散系。(4) The dispersion system for electrophoretic display according to any one of claims (1) to (3), wherein the dispersion medium is an alkylbenzene colored with a dye.
ップリング剤であって、第二の表面処理剤がソルビタン
脂肪酸エステル界面活性剤である請求項（１）〜（４）
の電気泳動表示用分散系。(5) Claims (1) to (4) wherein the first surface treatment agent of the electrophoretic particles is a titanate coupling agent, and the second surface treatment agent is a sorbitan fatty acid ester surfactant.
dispersion system for electrophoretic display.
請求項（１）〜（５）のいずれかに記載の電気泳動表示
用分散系を封入し、上記両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ように構成したことを特徴と
する電気泳動表示装置。(6) Between a pair of opposing electrode plates, at least one of which is transparent,
The dispersion system for electrophoretic display according to any one of claims (1) to (5) is enclosed, and the electrophoretic particles in the dispersion system are encapsulated under the action of a display control voltage applied between the two electrode plates. An electrophoretic display device characterized in that it is configured to perform a desired display operation by changing the optical reflection characteristics by changing the distribution state.
撓性電極板で各々構成され、これら両電極間に上記分散
系を小区間に不連続相に分割して封入する為の多孔性ス
ペーサを具備する請求項（６）の電気泳動表示装置。(7) One of the opposing electrode plates is a rigid electrode plate, and the other is a flexible electrode plate, and between these two electrodes, the dispersion system is divided into small sections into discontinuous phases and sealed. The electrophoretic display device according to claim 6, comprising a porous spacer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1106809A JP2733687B2 (en) | 1989-04-26 | 1989-04-26 | Electrophoretic display device and dispersion system for display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1106809A JP2733687B2 (en) | 1989-04-26 | 1989-04-26 | Electrophoretic display device and dispersion system for display |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02284128A true JPH02284128A (en) | 1990-11-21 |
| JP2733687B2 JP2733687B2 (en) | 1998-03-30 |
Family
ID=14443179
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1106809A Expired - Lifetime JP2733687B2 (en) | 1989-04-26 | 1989-04-26 | Electrophoretic display device and dispersion system for display |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2733687B2 (en) |
Cited By (13)
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|---|---|---|---|---|
| US5745094A (en) * | 1994-12-28 | 1998-04-28 | International Business Machines Corporation | Electrophoretic display |
| US6144361A (en) * | 1998-09-16 | 2000-11-07 | International Business Machines Corporation | Transmissive electrophoretic display with vertical electrodes |
| US6184856B1 (en) | 1998-09-16 | 2001-02-06 | International Business Machines Corporation | Transmissive electrophoretic display with laterally adjacent color cells |
| US6225971B1 (en) | 1998-09-16 | 2001-05-01 | International Business Machines Corporation | Reflective electrophoretic display with laterally adjacent color cells using an absorbing panel |
| US6271823B1 (en) | 1998-09-16 | 2001-08-07 | International Business Machines Corporation | Reflective electrophoretic display with laterally adjacent color cells using a reflective panel |
| US6853477B2 (en) | 2001-04-27 | 2005-02-08 | Canon Kabushiki Kaisha | Particles for electrophoresis, a production method thereof and a display using the particles |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5745094A (en) * | 1994-12-28 | 1998-04-28 | International Business Machines Corporation | Electrophoretic display |
| US5872552A (en) * | 1994-12-28 | 1999-02-16 | International Business Machines Corporation | Electrophoretic display |
| US6144361A (en) * | 1998-09-16 | 2000-11-07 | International Business Machines Corporation | Transmissive electrophoretic display with vertical electrodes |
| US6184856B1 (en) | 1998-09-16 | 2001-02-06 | International Business Machines Corporation | Transmissive electrophoretic display with laterally adjacent color cells |
| US6225971B1 (en) | 1998-09-16 | 2001-05-01 | International Business Machines Corporation | Reflective electrophoretic display with laterally adjacent color cells using an absorbing panel |
| US6271823B1 (en) | 1998-09-16 | 2001-08-07 | International Business Machines Corporation | Reflective electrophoretic display with laterally adjacent color cells using a reflective panel |
| US6853477B2 (en) | 2001-04-27 | 2005-02-08 | Canon Kabushiki Kaisha | Particles for electrophoresis, a production method thereof and a display using the particles |
| WO2005015892A3 (en) * | 2003-08-07 | 2005-03-31 | Bridgestone Corp | Image display device, image display panel manufacturing method, and image display panel |
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| US7405865B2 (en) | 2003-09-03 | 2008-07-29 | Mitsubishi Pencil Co., Ltd. | Liquid for electrophoretic display, display medium and display device using the same |
| JP2006184894A (en) * | 2004-12-01 | 2006-07-13 | Bridgestone Corp | Method of manufacturing panel for information display, and information display device |
| JP2007322857A (en) * | 2006-06-02 | 2007-12-13 | Mitsubishi Pencil Co Ltd | Liquid for electrophoretic display, electrophoretic display medium and electrophoretic display device using the same |
| JP2011043720A (en) * | 2009-08-21 | 2011-03-03 | Casio Computer Co Ltd | Electrophoretic display element |
| JP2012150178A (en) * | 2011-01-17 | 2012-08-09 | Fuji Xerox Co Ltd | Display medium and display device |
| JP2013210529A (en) * | 2012-03-30 | 2013-10-10 | Dainippon Printing Co Ltd | Electrophoretic display device |
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| Publication number | Publication date |
|---|---|
| JP2733687B2 (en) | 1998-03-30 |
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