JPS6195321A - Electrochromic display apparatus - Google Patents
Electrochromic display apparatusInfo
- Publication number
- JPS6195321A JPS6195321A JP59217612A JP21761284A JPS6195321A JP S6195321 A JPS6195321 A JP S6195321A JP 59217612 A JP59217612 A JP 59217612A JP 21761284 A JP21761284 A JP 21761284A JP S6195321 A JPS6195321 A JP S6195321A
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- display
- display electrode
- thickness
- insulating 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.)
- Pending
Links
Landscapes
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、エレクトロクロミック表示装置（以下ＫＣＤ
と言う）に関するものであり、特に固体電解質を用いた
ＩＩＤに関するものである・従来の技術
ＫＣＤは、電圧の印加により色変化する物質（以下ＥＣ
物質という）を表示物質として用いた表示装置である。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an electrochromic display device (hereinafter referred to as KCD).
(hereinafter referred to as EC), and in particular relates to IID using a solid electrolyte. - Conventional technology
This is a display device that uses a substance (referred to as a substance) as a display substance.
ＸＣ物質として代表的なものに、酸化タングステン、酸
化モリブデンなどの遷移金属酸化物や、ベルリンブルー
又はプルシアン７°′ルーが知られている。Typical XC substances include transition metal oxides such as tungsten oxide and molybdenum oxide, and Berlin blue or Prussian 7°'rue.
固体電解質を用いたＩＣＣＤは、固体電解質が特定イオ
ンのみを伝導するから必要な反応以外は起こらないよう
に出来るため、電流効率、メモリー。ICCDs using solid electrolytes have improved current efficiency and memory because the solid electrolyte conducts only specific ions and prevents reactions other than the necessary ones from occurring.
寿命の向上や、使用温度範囲の拡大が期待でき、セグメ
ント間が共通電解質となるのを防げるからドツトマトリ
クスが可能となる利点を有する６一般に固体電解質型Ｋ
ＣＤは第３図に示した構造を持っている。すなわちＩＴ
Ｏなどの透明電極１が設けられた透明基板２上に、ＥＣ
物質よりなる表示極３が形成され、これにＬｉ、Ｎ 、
ＬｉＴａ０．等の固体電解質４を積層し対向電極５が
設けられている。In general, solid electrolyte type K has the advantage of improving lifespan, expanding the operating temperature range, and preventing segments from using a common electrolyte, making dot matrix possible.
A CD has the structure shown in FIG. i.e. IT
On a transparent substrate 2 provided with a transparent electrode 1 such as O, an EC
A display electrode 3 made of a substance is formed, and Li, N,
LiTa0. A counter electrode 5 is provided by stacking solid electrolytes 4 such as the above.
前記固体電解質層の膜厚は、ＩＣＣＤ駆動時の抵抗を低
くするため、なるべく薄いことが望ましい。The thickness of the solid electrolyte layer is desirably as thin as possible in order to lower the resistance during ICCD driving.
なぜなら′膜厚が厚すぎると、表示極を変色させるため
に過大な印加電圧が必要となり、その結果固体電解質自
身の分解という副反応を引き起とすごとになるからであ
る。 、
発明が解決しようとする問題点
しかしながら膜厚が薄すぎると対向電極と表示極あるい
は透明電極とが短絡しやすくなる。この状況を詳しく図
解したのが第４図、第６図である。This is because, if the film is too thick, an excessively applied voltage will be required to discolor the display electrode, resulting in a side reaction of decomposition of the solid electrolyte itself. , Problems to be Solved by the Invention However, if the film thickness is too thin, the opposing electrode and the display electrode or transparent electrode are likely to short-circuit. Figures 4 and 6 illustrate this situation in detail.
もし固体電解質層の膜厚が表示極の膜厚より薄い ・場
合には、第４図の０部において、表示極と対向電極が短
゛絡しやすいものとなる。また、固体電解゛質層の膜厚
が透明電極の膜厚、ｌ：り廓い場合に畝第６図のＤ部に
おいて、透明電極と対向電極とが短絡しやすくなること
を示している０
以上の問題はマトリクス型表示を行うＩＥＣＤにおいて
さらに顕著となる。第６図はマトリクス型表示ＲＯＤの
代表例金示したもので、透明電極１が、紙面に垂直方向
に設けられている以外は第３図と同様の構成である。も
し固体電解質層の膜厚が薄い場合、第７図に示したよう
に、対向電極と表示極が短絡した＃）（Ｆ部）、さらに
薄いと第８図のように対向電極と透明電７極が短絡した
り（Ｇ部）するー
以上の様な短絡が起こると、ＩＣＣ物質、固体電解質層
に電場が印加されず、従らてＫ ｃ’物質は変′”色せ
ず、表示装置として機能し□ないことになる。If the thickness of the solid electrolyte layer is thinner than that of the display electrode, the display electrode and the counter electrode are likely to be short-circuited at part 0 in FIG. 4. In addition, when the film thickness of the solid electrolyte layer is different from the film thickness of the transparent electrode, 0 indicates that the transparent electrode and the counter electrode are likely to short-circuit in the D section of the ridge in Fig. 6. The above problems become even more noticeable in IECDs that perform matrix-type display. FIG. 6 shows a typical example of a matrix type display ROD, which has the same configuration as FIG. 3 except that the transparent electrode 1 is provided in a direction perpendicular to the paper surface. If the thickness of the solid electrolyte layer is thin, as shown in Figure 7, the counter electrode and the display electrode are short-circuited (#) (section F), and if it is even thinner, the counter electrode and transparent electrode 7 are short-circuited as shown in Figure 8. The poles are short-circuited (section G) - When such a short-circuit occurs, no electric field is applied to the ICC material and the solid electrolyte layer, so the Kc' material does not change color and the display device It will not function as □.
本発明は、前記に示したような、表示極あるい□は透明
電極と対向電極間の短絡という問題点を解決するもの＋
ある。The present invention solves the problem of short circuit between the display electrode or the transparent electrode and the counter electrode as shown above.
be.
問題点を解決するための手段
本発明は上記の問題を解決するため、表示極形べ
、−ヲ有する絶縁膜を形成する−もので、特に、マトリ
クス型表示に、ＣＤの場合には、表示極が形成された透
明電極以外の透明基板上に、表示極と透明電極を合わせ
た膜厚以上の膜厚を有する絶縁膜を形成する方法により
、電極間の短絡のないＸ ＯＤ ｆ （’Ｊ
・得ようとするものである。Means for Solving the Problems In order to solve the above-mentioned problems, the present invention forms an insulating film having a display pole shape.In particular, in the case of a matrix type display and a CD, the display X OD f ('J
・It is something you try to obtain.
作用
本発明において、絶縁膜の厚さを表示極の厚さと同じか
それ以上とする理由は次のとおりである。Function: In the present invention, the reason why the thickness of the insulating film is made equal to or greater than the thickness of the display electrode is as follows.
すなわ、ち、もし絶縁膜６の厚さが表示極のそれより小
さい場合、□極端は薄い同体電解質（こめ場合固体電解
質の膜厚は、表示極の膜厚から絶縁膜の膜厚を差引いた
もの以下とする）を積層して、□対向電極を設けた場合
、第９図のＨ部、第１０′図の１部のように表示極と対
向電極が短絡しやすいからである。In other words, if the thickness of the insulating film 6 is smaller than that of the display electrode, the thickness of the solid electrolyte is extremely thin (in this case, the thickness of the solid electrolyte is calculated by subtracting the thickness of the insulating film from the thickness of the display electrode). This is because if a □ counter electrode is provided by laminating the display electrode and the counter electrode, the display electrode and the counter electrode are likely to be short-circuited, as shown in part H in FIG. 9 and part 1 in FIG. 10'.
それゆえ絶縁膜の上端は必ず表示極の上端と同じ高さか
それ以上にし、表゛示極と対向電極との短絡を未然に防
ぐ必要がある。゛また、この構成により薄い膜厚の固体
電解質層を用いるととも容易になる。なお、製造工程を
簡単にする意味からは絶縁膜の上端は表示極の上端と同
じ高さであることが望ましい。Therefore, the upper end of the insulating film must be at the same height as or higher than the upper end of the display electrode to prevent a short circuit between the display electrode and the counter electrode. Furthermore, this configuration facilitates the use of a thin solid electrolyte layer. Note that, in order to simplify the manufacturing process, it is desirable that the upper end of the insulating film be at the same height as the upper end of the display electrode.
本発明によれば、電極間の短絡のない、固体電解質を用
いたＥＣＩ）が容易に得られる。According to the present invention, ECI using a solid electrolyte without short circuit between electrodes can be easily obtained.
実施例
（実施例１） ・
第１図は本発明における固体・電解質型ＫＣＤを示した
もので、面抵抗２０Ωで膜厚０．３μのＩＴＯ透明電極
１上に、電子ビーム蒸着法により膜厚０．３μの酸化タ
ングステン表示極３を設け、絶縁膜６としてＳｉＯｔ−
膜厚ｏ、３ｐ （表示極と同じ膜厚χ固体電解質４とし
てＬｉＡｅＩＰ４ を膜厚ｏ、ａμに設′ｉ、さらに
対向電極６どじて酸化イリジウムをｏ、Ｍμ積層したも
のである。表示極以外の透明電極上に絶縁膜を形成する
には、表示極上にレジ２）パタンを設けた後、全面に絶
縁膜を形成し、その後レジストと共に表示極上の絶縁膜
を除去するリフトオフ法によった。その結果率１１Ｄに
は電極間の短絡は無かった。また対向電極に対し表示極
に−１・２１７印加すると表示極は轢く着色し、斗１．
２Ｖ印加すると元の無色に戻ることを確認した。Example (Example 1) - Figure 1 shows a solid-electrolyte type KCD according to the present invention, in which a film was deposited on an ITO transparent electrode 1 with a sheet resistance of 20Ω and a film thickness of 0.3μ by electron beam evaporation. A 0.3μ tungsten oxide display electrode 3 is provided, and an insulating film 6 is made of SiOt-
The film thickness is o, 3p (the same film thickness as the display electrode).LiAeIP4 is set as the solid electrolyte 4 with a film thickness of o, aμ, and the counter electrode 6 is further laminated with iridium oxide of o, Mμ.Other than the display electrode In order to form an insulating film on the transparent electrode, a resist 2) pattern was provided on the display layer, an insulating film was formed on the entire surface, and then the lift-off method was used to remove the insulating film on the display layer together with the resist. As a result, there was no short circuit between the electrodes at rate 11D. Moreover, when -1.217 is applied to the display electrode with respect to the counter electrode, the display electrode becomes colored and becomes 1.
It was confirmed that when 2V was applied, it returned to its original colorless state.
（実施例２）
固体電解質としてＬｉＡ？Ｆ４ の膜厚を０．２μにし
た以外は実施例１と同様の構成でｘｃｎ１作・成した。(Example 2) LiA as a solid electrolyte? xcn1 was produced with the same configuration as in Example 1 except that the film thickness of F4 was 0.2μ.
固体電解質層の膜厚が実施例１より薄いにもかかわらず
電極間の短絡は無かった。また電□圧を印加した際の表
示極の応答速度は実施例１０°約半分になったことを確
認した。Although the thickness of the solid electrolyte layer was thinner than that in Example 1, there was no short circuit between the electrodes. It was also confirmed that the response speed of the display electrode when voltage was applied was approximately half that of Example 10.
（実施例３）
第２図は本発明におけるマトリクス型表示ＥＣＤを示し
たもので、透明電極１が紙面に垂直方向に設けられてい
る以外は実施例１と同様の構成である。すなわち絶縁膜
６の膜厚は、表示極３ （０，３μ）と透明電極１ （
０，３μ）の膜厚を合わせた厚さく０．６μ）に形成さ
れているＪその結果本実施例においても電極間の短絡は
なく、かつ表示極の着消色は明瞭であった◇
（実施例４）
固体電解質としてＬｉＡｌＬａ の膜厚を０．２μに
した以外は実施例３と同様の構成でＥＣＤｆ：、作成し
た。その結果は実施例２とほぼ同様であった。(Example 3) FIG. 2 shows a matrix type display ECD according to the present invention, which has the same configuration as Example 1 except that the transparent electrode 1 is provided in a direction perpendicular to the paper surface. In other words, the film thickness of the insulating film 6 is that of the display electrode 3 (0.3μ) and the transparent electrode 1 (
As a result, there was no short circuit between the electrodes in this example as well, and the coloring and fading of the display electrode was clear◇ ( Example 4) An ECDf was prepared in the same manner as in Example 3 except that the film thickness of LiAlLa was 0.2 μm as the solid electrolyte. The results were almost the same as in Example 2.
（実施例６＊ ６ｐ ７ ｙ ８ ）
ＥＣ物質として酸化モリブデンを用いた以外は実施例１
〜４と同様にしてＲＯＤを構成した。その結果、電極間
の短絡はなく、かつ表示極の着消色が可能であることを
確認した。(Example 6* 6p 7 y 8) Example 1 except that molybdenum oxide was used as the EC material
ROD was constructed in the same manner as in 4. As a result, it was confirmed that there was no short circuit between the electrodes, and that the display electrode could be colored and erased.
（実施例９，１０，１１．１２）
透明電極基板を、０．０２ モル／ ｌ ノＦｅＣ６５
と０．０２モル／ （ｌ ｃ７） Ｋ、Ｆｅ（ＯＮ）６
ｆ含む水溶ｉＫ浸ｉし、５μＡ ／ ｃｔＡで２０分陰
極電解し、透明電極上にベルリンブルー・表示極全０．
３μの厚さに形成し固体電解質層として、タンタル酸カ
リウムをスパッタによって形成し、対向電極としてパラ
ジウムを膜厚０・１μに形成した以外は実施例１〜４と
同様にしてＲＯＤを構成した。その結果、電極間の一短
絡は無く、かつ対向電極に対し、表示極に−２，ＯＶ印
加すると表示極は青色から無色となり、その後対向電極
と短絡すると元の青色に戻ることを確認した。(Examples 9, 10, 11.12) A transparent electrode substrate was coated with 0.02 mol/l of FeC65.
and 0.02 mol/(l c7) K, Fe(ON)6
Immerse in water-soluble iK containing f, cathode electrolyze at 5 μA/ctA for 20 minutes, and place a Berlin blue display electrode on the transparent electrode.
An ROD was constructed in the same manner as in Examples 1 to 4, except that potassium tantalate was formed by sputtering as a solid electrolyte layer with a thickness of 3 μm, and palladium was formed as a counter electrode with a thickness of 0.1 μm. As a result, it was confirmed that there was no short circuit between the electrodes, and that when −2.0V was applied to the display electrode with respect to the counter electrode, the display electrode changed from blue to colorless, and then when it was short-circuited with the counter electrode, it returned to the original blue color.
発明の効果
以上のように本発明によれば、絶縁膜の適切な配置によ
って、電極間の短絡の無いＫＣＤが得られる。本発明は
固体電解質を用いたＫＣＤ、とりわけマトリクス型表示
ＲＯＤの実用化に極めて有用である。Effects of the Invention As described above, according to the present invention, a KCD without short circuit between electrodes can be obtained by appropriately arranging the insulating film. The present invention is extremely useful for practical application of KCDs using solid electrolytes, especially matrix type display RODs.
第１図及び第２図は本発明の実施例のＥＣＤを示す縦断
面図、第３図は従来例のＥＣＤの縦断面図、第４図及び
第６図は同要部の拡大断面図、第６図は従来例のＫＯＤ
の縦断面図、第７図及び第８図は同要部の拡大断面図、
第９図及び第１０図は比較例のＥＣＤの縦断面図である
。
１・・・・・・透明電極、２・川・・透明基板、３・・
・・・・表示極、４・°°°°°固体電解質層、６・・
・・・・対向電極、６・・・・・・絶縁膜・
代理人の氏名 弁理士 中 尾 敏 男 ほか１名第１
図
箪 ２５！１
第 ３ 図
第 ４ 図
第 ５ 図
嬉 ７ 図
第９図
２゛１
第１０図1 and 2 are longitudinal sectional views showing an ECD according to an embodiment of the present invention, FIG. 3 is a longitudinal sectional view of a conventional ECD, and FIGS. 4 and 6 are enlarged sectional views of the same essential parts. Figure 6 shows the conventional KOD
, and FIGS. 7 and 8 are enlarged sectional views of the same essential parts.
9 and 10 are vertical cross-sectional views of ECDs of comparative examples. 1...Transparent electrode, 2...Transparent substrate, 3...
...Display electrode, 4.°°°°°Solid electrolyte layer, 6.
...Counter electrode, 6...Insulating film Name of agent: Patent attorney Toshio Nakao and 1 other person 1st
Figure 25!1 Figure 3 Figure 4 Figure 5 Figure 7 Figure 9 Figure 2-1 Figure 10
Claims (2)
質よりなる表示極と対向電極との間に固体電解質層を介
在してなるエレクトロクロミック表示装置であって、表
示極形成部以外の透明電極上に、表示極の膜厚以上の膜
厚を有する絶縁膜を形成したことを特徴とするエレクト
ロクロミック表示装置。(1) An electrochromic display device in which a solid electrolyte layer is interposed between a display electrode made of an electrochromic substance provided on a transparent electrode and a counter electrode, wherein An electrochromic display device comprising an insulating film having a thickness greater than that of a display electrode.
膜厚以上の膜厚を有する特許請求の範囲第１項記載のエ
レクトロクロミック表示装置。(2) The electrochromic display device according to claim 1, wherein the thickness of the insulating film is greater than or equal to the combined thickness of the display electrode and the transparent electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59217612A JPS6195321A (en) | 1984-10-17 | 1984-10-17 | Electrochromic display apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59217612A JPS6195321A (en) | 1984-10-17 | 1984-10-17 | Electrochromic display apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6195321A true JPS6195321A (en) | 1986-05-14 |
Family
ID=16707017
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59217612A Pending JPS6195321A (en) | 1984-10-17 | 1984-10-17 | Electrochromic display apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6195321A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS622025U (en) * | 1985-06-19 | 1987-01-08 | ||
| WO2005012995A1 (en) * | 2003-07-31 | 2005-02-10 | Sanyo Electric Co., Ltd. | Electrochromic display |
| US7858983B2 (en) | 2003-07-31 | 2010-12-28 | Satoshi Morita | Electrochromic display with current drive circuit |
-
1984
- 1984-10-17 JP JP59217612A patent/JPS6195321A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS622025U (en) * | 1985-06-19 | 1987-01-08 | ||
| WO2005012995A1 (en) * | 2003-07-31 | 2005-02-10 | Sanyo Electric Co., Ltd. | Electrochromic display |
| US7830582B2 (en) | 2003-07-31 | 2010-11-09 | Satoshi Morita | Electrochromic display |
| US7858983B2 (en) | 2003-07-31 | 2010-12-28 | Satoshi Morita | Electrochromic display with current drive circuit |
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