JPH01177517A - Electrophorectic display device - Google Patents

Electrophorectic display device

Info

Publication number
JPH01177517A
JPH01177517A JP63001758A JP175888A JPH01177517A JP H01177517 A JPH01177517 A JP H01177517A JP 63001758 A JP63001758 A JP 63001758A JP 175888 A JP175888 A JP 175888A JP H01177517 A JPH01177517 A JP H01177517A
Authority
JP
Japan
Prior art keywords
side electrode
display device
display
electrophorectic
thin wall
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.)
Pending
Application number
JP63001758A
Other languages
Japanese (ja)
Inventor
Tatsuya Oshima
達也 大島
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kyocera Crystal Device Corp
Original Assignee
Kyocera Crystal Device Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Kyocera Crystal Device Corp filed Critical Kyocera Crystal Device Corp
Priority to JP63001758A priority Critical patent/JPH01177517A/en
Publication of JPH01177517A publication Critical patent/JPH01177517A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B37/00—Lapping machines or devices; Accessories
    • B24B37/11—Lapping tools
    • B24B37/20—Lapping pads for working plane surfaces
    • B24B37/26—Lapping pads for working plane surfaces characterised by the shape of the lapping pad surface, e.g. grooved

Abstract

PURPOSE:To eliminate unequal displays and to extend the life of the title display device by providing plural pieces of thin wall parts which extend from a substrate side electrode so as to exist near to a display side electrode, thereby preventing settlement of electrophorectic particles. CONSTITUTION:A dispersant 11 such as a tetrachlorofluoroethane system or the like colored by ink or paint, etc., and the electrophorectic particles 12 of titanium oxide, etc., are dispersed uniformly in the housing of the electrophorectic display device 100. Plural pieces of the thin wall parts 16 which extend from the substrate side electrode 15 so as to exist near to the display side electrode 14 opposite thereto are provided. However, the cells are not completely divided and are not connected near the display side electrode 14. The settling speed of the electrophorectic particles 12 is then relieved by the respective cells. The unequal displays are thereby decreased and the life of the display device is extended.

Description

【発明の詳細な説明】 く本発明の目的〉 ［産業上の利用分野１ 本発明は、電気泳動を利用した電気泳動表示装置に関す
る。DETAILED DESCRIPTION OF THE INVENTION OBJECTS OF THE INVENTION [Industrial Field of Application 1] The present invention relates to an electrophoretic display device that utilizes electrophoresis.

［従来の技術１ 電気泳動表示装置としては、インク等のように着色され
た液体の分散媒と、電気泳動粒子を分散媒中に分散させ
て分散系を形成している。この分散系を挾んで両側に電
極を設け、表示の変更を行う際に電圧を印加して電気泳
動粒子を表示側電極に引き寄せて表示の変更を行うもの
である。[Prior Art 1] In an electrophoretic display device, a dispersion system is formed by dispersing a colored liquid dispersion medium such as ink and electrophoretic particles in the dispersion medium. Electrodes are provided on both sides of the dispersion system, and when changing the display, a voltage is applied to attract the electrophoretic particles to the display side electrodes to change the display.

これらを必要に応じ組み合わせて表示装置として利用す
るものである。These can be combined as necessary and used as a display device.

［発明か解決しようとする問題点］ しかしなから、電気泳動粒子は分散媒に均等に分布して
いるのではなく、電圧を長い間印加しない場合で特に表
示装置を垂直に立てている場合に、電気泳動粒子か表示
装置の下に沈降して表示むらの原因となり、表示装置の
寿命を短くしていた。[Problem to be solved by the invention] However, electrophoretic particles are not evenly distributed in the dispersion medium, and when no voltage is applied for a long time, especially when the display device is placed vertically. , electrophoretic particles settle under the display device, causing display unevenness and shortening the life of the display device.

これを解決するため、例えば特開昭５９−１７１９３０
号公報には、小区間のセルに分割した技術が開示されて
いる。しかし小区間に区切るとセルに分散系を注入する
際、均一に注入するのか難しい欠点かある。また、仕切
り板か表示側電極等に接触しているために、仕切り板の
部分の表示か欠落していた。In order to solve this problem, for example, Japanese Patent Application Laid-Open No. 59-171930
The publication discloses a technique of dividing into cells of small sections. However, if the dispersion is divided into small sections, it is difficult to inject uniformly when injecting the dispersion into the cell. In addition, because it was in contact with the partition plate or the display side electrode, the display on the partition plate was missing.

［本発明の目的］ 本発明は、電気泳動粒子か表示装置の下方に沈降するの
を緩和させ、分散媒中に均等に分布させて表示むらを減
少させ、表示装置の寿命をも伸ばしたものである。[Objective of the present invention] The present invention reduces the settling of electrophoretic particles below the display device, distributes them uniformly in the dispersion medium, reduces display unevenness, and extends the life of the display device. It is.

く本発明の構成〉 ［問題を解決する手段］ 分散媒と電気泳動粒子を有する分散系を側電極て挾み電
圧を印加して得られる電気泳動表示装置において、基板
側電極から伸び対向する表示側電極近傍まで延在させた
薄壁部を設けた構成の電気泳動表示装置である。Structure of the present invention> [Means for solving the problem] In an electrophoretic display device obtained by sandwiching a dispersion system having a dispersion medium and electrophoretic particles between side electrodes and applying a voltage, display parts extending from the substrate side electrodes and facing each other are provided. This is an electrophoretic display device having a structure in which a thin wall portion extends to the vicinity of side electrodes.

［作用及び実施例］ 第１図は、電気泳動表示装置１００で分散系１０を注入
した初期状態の断面図を示し、表示側電極１４と基板側
電極１５間に電圧を印加するが、本図では電極のパター
ン及び電源については省略しである。[Operations and Examples] FIG. 1 shows a sectional view of the initial state in which the dispersion system 10 is injected into the electrophoretic display device 100, and a voltage is applied between the display-side electrode 14 and the substrate-side electrode 15. The electrode pattern and power supply are omitted here.

この電気泳動表示装置１００は、基板１３，１７とスペ
ーサー１８．１８’で１つの筐体を構成している。筐体
内には、インクや塗料等で着色された四塩化二フッ化エ
タン系等の分散媒１１と酸化チタン等の電気泳動粒子１
２が均等になるように分散させである。すなわち分散媒
１１に電気泳動粒子１２か分散されて分散系１０を形成
しているものである。この分散系１０を挾んて表示側電
極１４と基板側電極１５に電圧を印加して、必要な表示
を得るものである。第１図は、電気泳動表示装置１００
を立てた状態であり、表示が現われるのは電気泳動表示
装置１００の左側である。This electrophoretic display device 100 has one housing made up of substrates 13 and 17 and spacers 18 and 18'. Inside the housing, there are dispersion medium 11 such as tetrachloride difluoroethane colored with ink or paint, and electrophoretic particles 1 such as titanium oxide.
2 are evenly distributed. That is, electrophoretic particles 12 are dispersed in a dispersion medium 11 to form a dispersion system 10. A voltage is applied to the display-side electrode 14 and the substrate-side electrode 15 across the dispersion system 10 to obtain a desired display. FIG. 1 shows an electrophoretic display device 100.
is in an upright position, and the display appears on the left side of the electrophoretic display device 100.

そこて、分散系１０の左側では表示の妨げにならないよ
うにする必要があり、表示側の基板１３には透明なガラ
スやフ“ラスチック等を用い、また表示側電極１４も透
明な５ｎ０２等を用いである。Therefore, it is necessary to ensure that the left side of the dispersion system 10 does not interfere with the display, so the display side substrate 13 is made of transparent glass or plastic, and the display side electrode 14 is also made of transparent 5N02 or the like. It is useful.

本発明は、電気泳動粒子１２の沈降を和らげるため基板
側電極１５から伸び、対向する表示側電極１４の近傍ま
で延在させた薄壁部１６を複数個設けたものである。実
施例では薄壁部１６を４つ設けて分散系１０を５つのセ
ルに分割したものである。しかしなから、セルは完全に
分割したのではなく、表示側電極１４の近傍ではつなが
っていない。このようにすると、電気泳動粒子１２の沈
降速度は各セルで緩和され表示むらを防止することが出
来た。また、表示装置の寿命を伸ばすことも出来た。In the present invention, a plurality of thin wall portions 16 are provided that extend from the substrate-side electrode 15 to the vicinity of the opposing display-side electrode 14 in order to soften the sedimentation of the electrophoretic particles 12. In the embodiment, four thin wall sections 16 are provided to divide the dispersion system 10 into five cells. However, the cells are not completely divided and are not connected in the vicinity of the display side electrode 14. In this way, the sedimentation speed of the electrophoretic particles 12 was reduced in each cell, and display unevenness could be prevented. It was also possible to extend the life of the display device.

さらに、分散系１０を各セルに注入する場合に、薄壁部
１６が表示側電極１４近傍でつながっていないために均
一に注入することが出来る。また、薄壁部１６は表示側
電極１４のごく近傍まで伸びているが、接触していない
ため、表示側より観察した場合に薄壁部１６による表示
の欠落部分をなくすこと力咄来、より□明確な表示をす
ることが出来た。Further, when the dispersion system 10 is injected into each cell, the thin wall portion 16 is not connected near the display side electrode 14, so that the dispersion system 10 can be injected uniformly. Furthermore, although the thin wall portion 16 extends very close to the display-side electrode 14, it is not in contact with the electrode 14 on the display side. □I was able to clearly display the information.

第２図（ａ）（ｂ）は、第１図の基板１３と表示側電極
１４をはずして表示側より観察したときの、稲の実施例
の正面図である。第２図（ａ）は、薄壁部を格子状に設
けることにより表示装置をどの方向に向けて置いてあっ
ても電気泳動粒子が凝集することなく、表示面全面に均
一に分散させておくことが出来る。薄壁部は表示側電極
の近傍まで延びている。また、第２図（ｂ）のように格
子の一部に隙間をつくり、分散系を注入しやすくしても
よい。FIGS. 2(a) and 2(b) are front views of the rice plant example when observed from the display side with the substrate 13 and display side electrode 14 of FIG. 1 removed. Figure 2 (a) shows that by providing thin walls in a lattice pattern, electrophoretic particles can be uniformly dispersed over the entire display surface without agglomeration, no matter which direction the display device is placed. I can do it. The thin wall portion extends to the vicinity of the display side electrode. Furthermore, as shown in FIG. 2(b), a gap may be created in a part of the lattice to facilitate injection of the dispersed system.

この場合にも、表示装置をどのような状態で置いてあっ
ても電気泳動粒子の各セルからの移動を少なく押さえる
ことが出来る。In this case as well, movement of electrophoretic particles from each cell can be suppressed to a minimum no matter what state the display device is placed in.

なお、薄壁部１６の形状は表示の妨げにならないように
薄い板状の絶縁材料、例えばポリアミド等の薄膜等のも
のを用いる。Note that the thin wall portion 16 is made of a thin plate-shaped insulating material, such as a thin film of polyamide, etc., so as not to interfere with display.

〈本発明の効果〉 基板側電極より伸び表示側電極近傍まで延在させた薄壁
部を複数個設けたものであるから、電気泳動粒子の沈降
を防止し表示むらがなくなった。<Effects of the Invention> Since a plurality of thin wall portions extending from the substrate side electrode to the vicinity of the display side electrode are provided, sedimentation of electrophoretic particles is prevented and display unevenness is eliminated.

また、薄壁部が表示側電極に接触していないため表示の
欠落部分をなくすことが出来た。これによって表示装置
の寿命を伸ばすことも出来るものとなった。Furthermore, since the thin wall portion does not contact the display-side electrode, it was possible to eliminate missing portions of the display. This also makes it possible to extend the life of the display device.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は、電気泳動表示装置の断面図。第２図（ａ）（
ｂ）は、薄壁部の正面図である。 ｌＯ・・・・・・分散系 １１・・・・・・分散媒 １２・・・・・・電気泳動粒子 １４・・・・・・表示側電極 １５・・・・・・基板側電極 １６・・・・・・薄壁部 特許出願人　　キンセキ株式会社 第１図FIG. 1 is a sectional view of an electrophoretic display device. Figure 2 (a) (
b) is a front view of the thin wall section. lO... Dispersion system 11... Dispersion medium 12... Electrophoretic particles 14... Display side electrode 15... Substrate side electrode 16... ... Thin wall section patent applicant Kinseki Co., Ltd. Figure 1

Claims (2)

【特許請求の範囲】[Claims] （１）分散媒と電気泳動粒子を有する分散系を両電極で
挾み電圧を印加して得られる電気泳動表示装置において
、基板側電極から伸び対向する表示側電極近傍まで延在
させた薄壁部を設けたことを特徴とする電気泳動表示装
置。(1) In an electrophoretic display device obtained by sandwiching a dispersion system containing a dispersion medium and electrophoretic particles between two electrodes and applying a voltage, a thin wall extending from the substrate side electrode to the vicinity of the opposing display side electrode is used. An electrophoretic display device, characterized in that it is provided with a section. （２）該薄壁部が複数個であることを特徴とする特許請
求の範囲第１項記載の電気泳動表示装置。(2) The electrophoretic display device according to claim 1, wherein the thin wall portion is plural.
JP63001758A 1988-01-06 1988-01-06 Electrophorectic display device Pending JPH01177517A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63001758A JPH01177517A (en) 1988-01-06 1988-01-06 Electrophorectic display device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63001758A JPH01177517A (en) 1988-01-06 1988-01-06 Electrophorectic display device

Publications (1)

Publication Number Publication Date
JPH01177517A true JPH01177517A (en) 1989-07-13

Family

ID=11510477

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63001758A Pending JPH01177517A (en) 1988-01-06 1988-01-06 Electrophorectic display device

Country Status (1)

Country Link
JP (1) JPH01177517A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998019208A3 (en) * 1996-10-25 1998-07-09 Massachusetts Inst Technology Nonemissive displays and piezoelectric power supplies therefor
US6241921B1 (en) 1998-05-15 2001-06-05 Massachusetts Institute Of Technology Heterogeneous display elements and methods for their fabrication
US6480182B2 (en) 1997-03-18 2002-11-12 Massachusetts Institute Of Technology Printable electronic display
US6753999B2 (en) 1998-03-18 2004-06-22 E Ink Corporation Electrophoretic displays in portable devices and systems for addressing such displays
JP2006030773A (en) * 2004-07-20 2006-02-02 Bridgestone Corp Panel for picture display and picture display device
WO2007004396A1 (en) * 2005-06-30 2007-01-11 Brother Kogyo Kabushiki Kaisha Method for manufacturing electrophoretic display medium, and electrophoretic display medium
US7667684B2 (en) 1998-07-08 2010-02-23 E Ink Corporation Methods for achieving improved color in microencapsulated electrophoretic devices
US7821701B2 (en) 2006-06-30 2010-10-26 Koninklijke Philips Electronics N.V. Electrophoretic display with homogeneously distributed electrically charged particles
JP2011048089A (en) * 2009-08-26 2011-03-10 Fuji Xerox Co Ltd Display medium and display device
US9005494B2 (en) 2004-01-20 2015-04-14 E Ink Corporation Preparation of capsules

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998019208A3 (en) * 1996-10-25 1998-07-09 Massachusetts Inst Technology Nonemissive displays and piezoelectric power supplies therefor
US5930026A (en) * 1996-10-25 1999-07-27 Massachusetts Institute Of Technology Nonemissive displays and piezoelectric power supplies therefor
AU721087B2 (en) * 1996-10-25 2000-06-22 Massachusetts Institute Of Technology Nonemissive displays and piezoelectric power supplies therefor
US6130773A (en) * 1996-10-25 2000-10-10 Massachusetts Institute Of Technology Nonemissive displays and piezoelectric power supplies therefor
US6980196B1 (en) 1997-03-18 2005-12-27 Massachusetts Institute Of Technology Printable electronic display
US6480182B2 (en) 1997-03-18 2002-11-12 Massachusetts Institute Of Technology Printable electronic display
US6753999B2 (en) 1998-03-18 2004-06-22 E Ink Corporation Electrophoretic displays in portable devices and systems for addressing such displays
US6241921B1 (en) 1998-05-15 2001-06-05 Massachusetts Institute Of Technology Heterogeneous display elements and methods for their fabrication
US7667684B2 (en) 1998-07-08 2010-02-23 E Ink Corporation Methods for achieving improved color in microencapsulated electrophoretic devices
US9293511B2 (en) 1998-07-08 2016-03-22 E Ink Corporation Methods for achieving improved color in microencapsulated electrophoretic devices
US9005494B2 (en) 2004-01-20 2015-04-14 E Ink Corporation Preparation of capsules
JP2006030773A (en) * 2004-07-20 2006-02-02 Bridgestone Corp Panel for picture display and picture display device
WO2007004396A1 (en) * 2005-06-30 2007-01-11 Brother Kogyo Kabushiki Kaisha Method for manufacturing electrophoretic display medium, and electrophoretic display medium
US7821701B2 (en) 2006-06-30 2010-10-26 Koninklijke Philips Electronics N.V. Electrophoretic display with homogeneously distributed electrically charged particles
JP2011048089A (en) * 2009-08-26 2011-03-10 Fuji Xerox Co Ltd Display medium and display device

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