JPH0677179B2 - Display device - Google Patents
Display deviceInfo
- Publication number
- JPH0677179B2 JPH0677179B2 JP17321185A JP17321185A JPH0677179B2 JP H0677179 B2 JPH0677179 B2 JP H0677179B2 JP 17321185 A JP17321185 A JP 17321185A JP 17321185 A JP17321185 A JP 17321185A JP H0677179 B2 JPH0677179 B2 JP H0677179B2
- Authority
- JP
- Japan
- Prior art keywords
- electric field
- electrostatic image
- display device
- writing
- electrode
- 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
Links
Landscapes
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Photoreceptors In Electrophotography (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、低消費電力，安価な大画面の表示に適する
表示装置に関するものである。The present invention relates to a display device suitable for displaying a large screen at low power consumption and at low cost.
従来のこの種の大型の表示装置はCRTを多数個つないだ
り、液晶表示板を多数個つないだりして大画面を構成し
ていた。In the conventional large-sized display device of this kind, a large screen is configured by connecting a large number of CRTs or a large number of liquid crystal display boards.
ところで上記CRTを利用する表示方式では画像信号分割
回路が複雑となり、CRT自体も奥行があり重量も重くな
り、価格も高価になるという問題点があった。また液晶
表示板を利用する方式も多数個を接続するため構成が複
雑、かつ高価になるという問題点があつた。However, in the display method using the CRT, the image signal division circuit becomes complicated, and the CRT itself has a problem in that it is deep, heavy, and expensive. In addition, the method using a liquid crystal display panel has a problem in that the structure is complicated and expensive because a large number of them are connected.
この発明は、これらの欠点を除去するためになされたも
ので、簡易な構成で大形の表示を可能とする表示装置を
提供することを目的とする。The present invention has been made to eliminate these drawbacks, and an object of the present invention is to provide a display device capable of displaying a large size with a simple structure.
この発明にかかる表示装置は、電界発色媒体と、コロナ
イオンの流れを制御して静電像を電界発色媒体に書き込
む書き込み電極とからなるものである。The display device according to the present invention comprises an electric field coloring medium and a writing electrode for controlling the flow of corona ions to write an electrostatic image on the electric field coloring medium.
この発明では、書き込み電極で電界発色媒体を走査する
ことにより電界発色媒体上に静電像を形成すると、この
静電像から生じる電界により電界発色媒体の発色が行わ
れる。According to the present invention, when an electrostatic image is formed on the electric field coloring medium by scanning the electric field coloring medium with the writing electrode, the electric field generated from this electrostatic image causes the electric field coloring medium to develop color.
第１図はこの発明の一実施例を示す構成略図である。こ
の図で、10は書き込み電極で、コロナワイヤ11から発生
したコロナイオンの流れを制御する。なお、12はシール
ドケース、13は書き込み電極制御回路である。また20は
電界発色媒体で、透明基体21と電界発色層22から主とし
て構成されるがその詳細は後述する。22Aは電界のため
発色した領域を示す。書き込み電極10はコロナワイヤ11
から発生したコロナイオンを制御する。コロナワイヤ11
は60〜120μｍ径の金メツキタングステン線に＋または
−の4KV〜10KVの電圧を印加しコロナイオンを発生させ
る。コロナイオンは第２図（ａ），（ｂ）に示すような
原理で書き込み電極10中の通過が制御される。FIG. 1 is a schematic diagram showing an embodiment of the present invention. In this figure, 10 is a writing electrode, which controls the flow of corona ions generated from the corona wire 11. Reference numeral 12 is a shield case, and 13 is a write electrode control circuit. Reference numeral 20 is an electric field coloring medium, which is mainly composed of a transparent substrate 21 and an electric field coloring layer 22, which will be described in detail later. 22A indicates a region colored due to the electric field. The writing electrode 10 is a corona wire 11
Control the corona ions generated from. Corona wire 11
Applies + or − voltage of 4 KV to 10 KV to a gold-plated tungsten wire having a diameter of 60 to 120 μm to generate corona ions. The passage of corona ions in the writing electrode 10 is controlled on the principle as shown in FIGS. 2 (a) and 2 (b).
第２図（ａ），（ｂ）において、書き込み電極10は上部
電極10aと下部電極10bとが所定間隔で配置され、中央に
設けられた透孔をコロナイオン流が通過できるように構
成されている。14は高圧電源、15は制御電源で、第１図
の書き込み電極制御回路13から制御に応じて供給され
る。16はバイアス電源である。また17は透明基体、18は
その上の透明導電層である。In FIGS. 2A and 2B, the writing electrode 10 is configured such that an upper electrode 10a and a lower electrode 10b are arranged at a predetermined interval, and a corona ion flow can pass through a through hole provided in the center. There is. Reference numeral 14 is a high voltage power supply, and 15 is a control power supply, which is supplied from the write electrode control circuit 13 of FIG. 1 under control. 16 is a bias power supply. Further, 17 is a transparent substrate, and 18 is a transparent conductive layer thereon.
次に動作について説明する。Next, the operation will be described.
第２図（ａ）のように上部電極10a側が＋，下部電極10b
側が−になるように制御電源15を印加すると、電界が順
方向となりコロナイオンが通過し、第２図（ｂ）のよう
に逆方向の場合はコロナイオンが通過できない。上記原
理の静電像の書き込み電極10で電界発色層22上に静電像
を形成し、発色させる。発色した像はガラス等からなる
透明基体17の側から見ると表示された像として見ること
ができる。As shown in FIG. 2 (a), the upper electrode 10a side is +, the lower electrode 10b is
When the control power supply 15 is applied so that the side becomes negative, the electric field becomes a forward direction and the corona ions pass therethrough, while the corona ions cannot pass in the opposite direction as shown in FIG. 2 (b). An electrostatic image is formed on the electric field coloring layer 22 by the electrostatic image writing electrode 10 according to the above principle, and color is developed. The colored image can be seen as a displayed image when viewed from the side of the transparent substrate 17 made of glass or the like.
表示像を消去する場合は、コロナワイヤ11に書き込み時
とは逆の極性の電位を加えコロナイオンを通過可能な状
態にして走査すれば、書き込み時とは逆の極性のコロナ
イオンが電界発色層22上にのり、像は消去される。When erasing the displayed image, by applying an electric potential of the opposite polarity to that at the time of writing to the corona wire 11 so that the corona ions can pass through and scanning, the corona ions of the opposite polarity at the time of writing are formed in the electric field coloring layer. The image is erased when it is on top of 22.
次に電界発色層22の例を２つ示す。Next, two examples of the electric field coloring layer 22 will be shown.
（ｉ） 電気泳動型 構成例を第３図に示す。電界発色層22は、透明導電層22
a、帯電着色粒子23を絶縁性液体中に分散させた液体層2
2b、絶縁層22cからなる。絶縁性の液体としては高純度
石油（エツソ社，商品名アイソパー）を用い、イオン性
界面活性剤，染料を含有した有機物を混合して前記液体
層22bを作成する。これによりイオン性界面活性剤が顔
料を含有した有機物に吸着してその有機物が電気化学的
に安定に帯電し、分散され、電気泳動の性質を示すよう
になる。(I) Electrophoresis type A structural example is shown in FIG. The electric field coloring layer 22 is a transparent conductive layer 22.
a, liquid layer 2 in which charged colored particles 23 are dispersed in an insulating liquid
2b and an insulating layer 22c. High-purity petroleum (ETSO Co., Ltd., trade name Isopar) is used as an insulating liquid, and an organic substance containing an ionic surfactant and a dye is mixed to form the liquid layer 22b. As a result, the ionic surfactant is adsorbed on the organic substance containing the pigment, the organic substance is electrochemically and stably charged and dispersed, and exhibits the electrophoretic property.
これの動作は電界が加わらないか逆電界が加わつている
時は絶縁性の液体層22b中に分散された染料の色が見え
ているが、静電像24が書き込まれると帯電着色粒子23が
透明導電層22aの側に移動し顔料の色が見えることによ
り行われる。In this operation, when the electric field is not applied or the reverse electric field is applied, the color of the dye dispersed in the insulating liquid layer 22b is visible, but when the electrostatic image 24 is written, the charged colored particles 23 are generated. This is performed by moving to the transparent conductive layer 22a side and observing the color of the pigment.
（ii） 回転球型 構成例を第４図に示す。電界発色層22は、透明導電層22
a,片面に着色した片面着色球22eを絶縁性液体22fで浮か
せ絶縁性保持媒質22d中に埋め込んだ層、絶縁層22cから
なる。片面着色球22eは、例えばTiO2を主成分とするガ
ラスの白色の球を一様に配置し上面からクロム等を蒸着
することにより作成する。その大きさは30〜100μｍで
よいが、10μｍ以下とすればより解像度が高くなる。こ
の片面着色球22eを、例えばエラストマーのような絶縁
性保持媒質22d中に分散させ、トルエン等の有機溶媒に
イオン性界面活性剤を溶かした溶液に浸たすことにより
膨潤させ片面着色球22eのまわりに絶縁性液体22fをたま
らせる。片面着色球22eは表面の性質が異なるためイオ
ンの吸着の量が異なり電界の方向により面の向きが変化
する。従つてこれの動作は静電像24が＋の場合と−の場
合で着色面が見えたり着色しない面が見えたりして表示
の機能が行われる。(Ii) Rotating sphere type A structural example is shown in FIG. The electric field coloring layer 22 is a transparent conductive layer 22.
a, a layer in which a single-sided colored sphere 22e colored on one side is floated by an insulating liquid 22f and embedded in an insulating holding medium 22d, and an insulating layer 22c. The single-sided colored spheres 22e are formed by, for example, uniformly arranging white spheres of glass containing TiO 2 as a main component and depositing chromium or the like from the top surface. The size may be 30 to 100 μm, but if it is 10 μm or less, the resolution becomes higher. The one-sided colored spheres 22e are dispersed in an insulating holding medium 22d such as an elastomer, and the one-sided colored spheres 22e are swollen by being immersed in a solution prepared by dissolving an ionic surfactant in an organic solvent such as toluene. Allow the insulating liquid 22f to collect around. Since the surface of the single-sided colored sphere 22e is different, the amount of adsorbed ions is different and the direction of the surface changes depending on the direction of the electric field. Therefore, in this operation, the display function is performed by viewing the colored surface or the uncolored surface depending on whether the electrostatic image 24 is + or −.
第５図にこの発明にかかる表示装置の一実施例の外観を
示す。この図で、10Aは静電像書き込み部であり、第１
図の書き込み電極10が多数上下方向に設けられ静電像書
き込み部10Aが図示しない走査機構で矢印方向に移動す
ると各書き込み電極10もこれに応じて移動する。すなわ
ち、透明基板21上の電界発色層22に書き込み電極10の走
査によつて静電像24を書き込み表示するものである。な
お、電力線（AC、100V）の入力端子25,計算機からの信
号の入力端子26を有する。FIG. 5 shows the appearance of one embodiment of the display device according to the present invention. In this figure, 10A is an electrostatic image writing unit, and
When a large number of writing electrodes 10 in the figure are provided in the vertical direction and the electrostatic image writing unit 10A moves in the arrow direction by a scanning mechanism (not shown), each writing electrode 10 also moves accordingly. That is, the electrostatic image 24 is written and displayed on the electric field coloring layer 22 on the transparent substrate 21 by scanning the writing electrode 10. It has an input terminal 25 for a power line (AC, 100V) and an input terminal 26 for a signal from a computer.
以上説明したようにこの発明は、電界発色媒体上を、コ
ロナイオンの流れを制御して静電像を形成する書き込み
電極で走査して静電像を形成し、その電界により電界発
色媒体を発色させるようにしたので、低消費電力，安
価，薄形で高品質に大画面の表示ができる利点があり、
電子会議での電子黒板等の大画面表示板に好適である。As described above, according to the present invention, the electric field coloring medium is scanned by the writing electrode that controls the flow of corona ions to form the electrostatic image, and the electrostatic image is formed. Since it has been made possible, it has the advantages of low power consumption, inexpensive, thin, high-quality, large-screen display,
It is suitable for large screen display boards such as electronic blackboards in electronic conferences.
第１図はこの発明の一実施例を示す構成略図、第２図
（ａ），（ｂ）は静電像書き込み電極の動作原理の説明
図、第３図はこの発明に用いる電界発色層のうち電気泳
動型の場合の実施例を示す構成略図、第４図は同じく回
転球型の実施例を示す構成略図、第５図はこの発明によ
る表示装置の構成例を示す斜視図である。 図中、10は書き込み電極、11はコロナワイヤ、12はシー
ルドケース、13は書き込み電極制御回路、20は電界発色
媒体、21は透明基体、22は電界発色層である。FIG. 1 is a schematic diagram showing an embodiment of the present invention, FIGS. 2 (a) and 2 (b) are explanatory views of the principle of operation of an electrostatic image writing electrode, and FIG. 3 is an electric field coloring layer used in the present invention. Of these, a schematic configuration diagram showing an embodiment of the electrophoretic type, FIG. 4 is a schematic configuration diagram showing a rotating sphere type embodiment, and FIG. 5 is a perspective view showing a configuration example of a display device according to the present invention. In the figure, 10 is a writing electrode, 11 is a corona wire, 12 is a shield case, 13 is a writing electrode control circuit, 20 is an electric field coloring medium, 21 is a transparent substrate, and 22 is an electric field coloring layer.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 岡崎 哲夫 神奈川県横須賀市武１丁目2356番地 日本 電信電話株式会社横須賀電気通信研究所内 (72)発明者 及川 茂 茨城県那珂郡東海村大字白方字白根162番 地 日本電信電話株式会社茨城電気通信研 究所内 (56)参考文献 特開 昭60−95584（ＪＰ，Ａ) 特開 昭60−256186（ＪＰ，Ａ) 特開 昭61−84154（ＪＰ，Ａ) 特開 昭61−84677（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tetsuo Okazaki 1-2356 Take, Yokosuka City, Kanagawa Prefecture Yokosuka Telecommunications Research Institute, Nippon Telegraph and Telephone Corporation (72) Inventor Shigeru Oikawa Tokai-mura, Naka-gun, Ibaraki Prefecture 162 Shirane, Nippon Telegraph and Telephone Corporation, Ibaraki Research Institute of Electrical Communication (56) Reference JP-A-60-95584 (JP, A) JP-A-60-256186 (JP, A) JP-A-61-84154 (JP , A) JP-A-61-84677 (JP, A)
Claims (1)
成する書き込み電極と、この書き込み電極により形成さ
れた静電像による電界が印加されると発色する電界発色
媒体からなることを特徴とする表示装置。1. A writing electrode for controlling the flow of corona ions to form an electrostatic image, and an electric field coloring medium that develops color when an electric field based on the electrostatic image formed by the writing electrode is applied. And display device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17321185A JPH0677179B2 (en) | 1985-08-08 | 1985-08-08 | Display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17321185A JPH0677179B2 (en) | 1985-08-08 | 1985-08-08 | Display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6234187A JPS6234187A (en) | 1987-02-14 |
| JPH0677179B2 true JPH0677179B2 (en) | 1994-09-28 |
Family
ID=15956178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17321185A Expired - Lifetime JPH0677179B2 (en) | 1985-08-08 | 1985-08-08 | Display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0677179B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6982178B2 (en) * | 2002-06-10 | 2006-01-03 | E Ink Corporation | Components and methods for use in electro-optic displays |
-
1985
- 1985-08-08 JP JP17321185A patent/JPH0677179B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6234187A (en) | 1987-02-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |