JPS6124692B2 - - Google Patents
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- Publication number
- JPS6124692B2 JPS6124692B2 JP51150810A JP15081076A JPS6124692B2 JP S6124692 B2 JPS6124692 B2 JP S6124692B2 JP 51150810 A JP51150810 A JP 51150810A JP 15081076 A JP15081076 A JP 15081076A JP S6124692 B2 JPS6124692 B2 JP S6124692B2
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- segment
- layer
- electrodes
- electrochromic
- 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
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- 238000004040 coloring Methods 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 9
- 239000000126 substance Substances 0.000 claims description 3
- 230000005684 electric field Effects 0.000 description 15
- 239000010931 gold Substances 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical compound [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 229910004261 CaF 2 Inorganic materials 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229910006404 SnO 2 Inorganic materials 0.000 description 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
- 229910000410 antimony oxide Inorganic materials 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 1
- 229910001634 calcium fluoride Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 229910000423 chromium oxide Inorganic materials 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910003437 indium oxide Inorganic materials 0.000 description 1
- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- ORUIBWPALBXDOA-UHFFFAOYSA-L magnesium fluoride Chemical compound [F-].[F-].[Mg+2] ORUIBWPALBXDOA-UHFFFAOYSA-L 0.000 description 1
- 229910001635 magnesium fluoride Inorganic materials 0.000 description 1
- 229910000476 molybdenum oxide Inorganic materials 0.000 description 1
- QGLKJKCYBOYXKC-UHFFFAOYSA-N nonaoxidotritungsten Chemical compound O=[W]1(=O)O[W](=O)(=O)O[W](=O)(=O)O1 QGLKJKCYBOYXKC-UHFFFAOYSA-N 0.000 description 1
- VTRUBDSFZJNXHI-UHFFFAOYSA-N oxoantimony Chemical compound [Sb]=O VTRUBDSFZJNXHI-UHFFFAOYSA-N 0.000 description 1
- PQQKPALAQIIWST-UHFFFAOYSA-N oxomolybdenum Chemical compound [Mo]=O PQQKPALAQIIWST-UHFFFAOYSA-N 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000000377 silicon dioxide 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
- 229910001930 tungsten oxide Inorganic materials 0.000 description 1
Description
【発明の詳細な説明】
エレクトロクロミツク（以下Ｅ・Ｃと記す）素
子は、Ｅ・Ｃ物質を介在した対向２電極間に或る
極性の電界を加えることにより、素子を着色し、
（以下この様な電界を着色電界という。）そして、
逆極性電界を加えることにより、それを消色して
いる。（以下この逆極性電界を消色電界という。）
従つて、このＥ・Ｃ素子で、複数の模様の表示を
行う為には、前記対向電極の一方を互いに絶縁し
た複数のセグメント電極で構成し、この複数のセ
グメント電極のいくつかと、他方の対向電極との
間に、着色電界を加えて、或る模様の表示を行
い、そしてその後に、別の模様の表示を行う為に
は、まず、上述のいくつかのセグメント電極と対
向電極間に消色電界を加え、それと同時又はその
後に、所要のセグメント電極と対向電極間に着色
電界を加えることが必要となる。即ち、従来の
Ｅ・Ｃ素子にあつては、表示内容を変える為に
は、新たな着色電極界を加える作用とは別に、必
ず、前の表示内容を消す為に消色電界を加える作
用が必要であつた。[Detailed Description of the Invention] An electrochromic (hereinafter referred to as E/C) element colors the element by applying an electric field of a certain polarity between two opposing electrodes with an E/C substance interposed between them.
(Hereinafter, such an electric field will be referred to as a colored electric field.) And,
The color is erased by applying an electric field of opposite polarity. (Hereinafter, this reverse polarity electric field will be referred to as a color erasing electric field.)
Therefore, in order to display a plurality of patterns with this E/C element, one of the opposing electrodes is composed of a plurality of segment electrodes insulated from each other, and some of the plurality of segment electrodes and the other opposing In order to display a certain pattern by applying a colored electric field between the electrodes, and then to display another pattern, first, a dissipation layer is applied between the several segment electrodes and the opposing electrode. It is necessary to apply a colored electric field and, simultaneously or subsequently, to apply a colored electric field between the required segment electrodes and counter electrodes. That is, in the case of conventional E/C elements, in order to change the display content, in addition to the action of adding a new colored electrode field, there is always the action of adding a decoloring electric field to erase the previous display content. It was necessary.
本発明の目的は、或る模様の表示から他模様の
表示に切り換える際、前の着色の消色作用と、新
たな着色作用とを同一作用で行うＥ・Ｃ素子を提
供することである。 An object of the present invention is to provide an E/C element that performs the decoloring action of the previous coloring and the new coloring action in the same action when switching from displaying one pattern to displaying another pattern.
本発明の基礎となる原理を説明すると、第１図
において、酸化インジウムIn2O3や酸化スズSnO2
や金Au等の透明導電膜からなる共通電極層１の
下に一酸化硅素SiC、二酸化硅素SiO2、フツ化マ
グネシウムMgF2、フツ化カルシウムCaF2、又は
酸化クロムCr2O3等からなる電子阻止層（プロト
ン供給層）２が形成され、更にその下に、酸化タ
ングステンWO3、酸化モリブデンMoO3又は酸化
アンチモンSbO3等からなるＥ・Ｃ物質層４が、
そしてその下には互いに絶縁された複数個（図示
例では２つ）のセグメント電極層６ａ，６ｂがあ
る。この６ａ，６ｂの一方が表示電極で、他方が
ダミー電極となる。これらの電極層６ａ，６ｂは
前記共通電極層１に用いた物質を使用できる。ま
た、共通電極層１とセグメント電極層６ａ，６ｂ
の一方を不透明な導電物質で構成してもよい。８
はガラス等の基板である。セグメント電極６ａ，
６ｂは夫々リード線１０ａ，１０ｂとスイツチ１
２を介して選択的に互いに逆極性の電源１４及び
１６に接続される。今スイツチ１２が、実線の如
く電源１４に接続された場合には、矢印で示す如
く電流路１８が形成され、セグメント電極６ｂと
共通電極１とにはさまれたＥ・Ｃ層が着色する。
次に、スイツチ１２を点線位置に切換え、電源１
６に接続すると、電源１６から電流路１８に矢印
とは逆向きに電流が供給され、前述の着色領域が
消色し、それと同時に、セグメント電極６ａと共
通電極１との間のＥ・Ｃ層が着色する。こうし
て、セグメント電極６ａと６ｂに電界をかけるこ
とにより、そのセグメント電極６ａと６ｂの一方
の上方のＥ・Ｃ層が着色し同時に他方の上方の
Ｅ・Ｃ層が消色する。 To explain the principle underlying the present invention, in Fig. 1, indium oxide In 2 O 3 and tin oxide SnO 2
Electrons made of silicon monoxide SiC, silicon dioxide SiO 2 , magnesium fluoride MgF 2 , calcium fluoride CaF 2 , or chromium oxide Cr 2 O 3 under the common electrode layer 1 made of a transparent conductive film such as gold or gold Au. A blocking layer (proton supply layer) 2 is formed, and further below, an E/C material layer 4 made of tungsten oxide WO 3 , molybdenum oxide MoO 3 , antimony oxide SbO 3 , etc.
Below that, there are a plurality of (two in the illustrated example) segment electrode layers 6a and 6b that are insulated from each other. One of these 6a and 6b becomes a display electrode, and the other becomes a dummy electrode. The materials used for the common electrode layer 1 can be used for these electrode layers 6a and 6b. In addition, the common electrode layer 1 and the segment electrode layers 6a and 6b
One of the two may be made of an opaque conductive material. 8
is a substrate such as glass. segment electrode 6a,
6b are lead wires 10a, 10b and switch 1, respectively.
2 to power supplies 14 and 16 of opposite polarity. When the switch 12 is connected to the power source 14 as shown by the solid line, a current path 18 is formed as shown by the arrow, and the E and C layers sandwiched between the segment electrode 6b and the common electrode 1 are colored.
Next, switch 12 to the dotted line position, and power supply 1
6, a current is supplied from the power supply 16 to the current path 18 in the direction opposite to the arrow, the coloring region described above is decolored, and at the same time, the E/C layer between the segment electrode 6a and the common electrode 1 is is colored. In this manner, by applying an electric field to the segment electrodes 6a and 6b, the E/C layer above one of the segment electrodes 6a and 6b is colored, and at the same time, the E/C layer above the other segment electrode is decolored.
次に、本発明をセブンセグメント表示素子に適
用した実施例を第２図により説明する。 Next, an embodiment in which the present invention is applied to a seven segment display element will be described with reference to FIG.
公知の配置のセブンセグメント電極を構成する
表示電極２１〜２７には、夫々抵抗２１ａ〜２７
ａを介して正電位＋Ｖが、またトランジスタ２１
ｂ〜２７ｂを介して負電位−Ｖが選択的に印加さ
れる。尚、同図ではセグメント電極と各トランジ
スタ及び抵抗との関係を明示する為に、実際のセ
グメント表示電極の配置とは異つた配置として描
れている。今、配電盤３０からの出力が、例えば
トランジスタ２１ｂ、２２ｂ、２３ｂ、２４ｂを
導通にし、他のトランジスタを不導通にするとセ
グメント表示電極２１，２２，２３，２４が負電
位にバイアスされ他のセグメント表示電極２５，
２６，２７は正電位にバイアスされるので、セグ
メント表示電極２１〜２４の上方のＥ・Ｃ層４が
着色し、残りのセグメント表示電極２５〜２７の
上方のＥ・Ｃ層４は消色する。次に、配電盤３０
によりトランジスタ２２ｂ，２３ｂ，２４ｂ，２
５ｂを導通にし、残りのトランジスタ２１ｂ，２
６ｂ，２７ｂを不導通にすると、セグメント表示
電極２２〜２５の上方のＥ・Ｃ層が着色すると同
時に、セグメント表示電極２１，２６，２７の上
方のＥ・Ｃ層が消色し、前とは異つた表示が行わ
れる。尚右端に設けたダミー電極２８、それのト
ランジスタ２８ｂ及び２８ａの働きは、セグメン
ト表示電極２１〜２７のすべての上のＥ・Ｃ層４
を着色する為、及びそれを消色する為の電流路を
形成することである。詳述すると配電盤３０は、
トランジスタ２１ｂ〜２７ｂのすべてを導通にす
る信号を発生するときは、同時にトランジスタ２
８ｂを不導通にすべき信号も発生し、ダミー電極
２８を正電位にバイアスし、セグメント電極２１
〜２７のすべてを負電位にバイアスして、電流路
を形成する。また配電盤はトランジスタ２１〜２
７のすべてを不導通にするときはトランジスタ２
８を導通にし、各電極に上とは逆極性のバイアス
を加え、電流路を形成する。尚この後者の場合に
はダミー電極２８の上方のＥ・Ｃ層が着色するの
で、その着色を外部から見えない様に遮蔽する為
のカバー３１をガラス基板８の上に設けてある。
この様に、表示内容を変える為に、従来のＥ・Ｃ
素子にあつては、必ず該当の電極に逆極性の電界
即ち消色電界を印加していたのが、本発明による
と、その消色電界の印加と、新しい表示内容を得
る為の着色電界の印加とを単にスイツチング素子
のオン・オフにより同時に行えるので、配電盤等
の構造が簡略化できる。 Display electrodes 21 to 27 constituting seven segment electrodes having a known arrangement are provided with resistors 21a to 27, respectively.
A positive potential +V is also applied to the transistor 21 through a.
A negative potential -V is selectively applied via b to 27b. In this figure, in order to clearly show the relationship between the segment electrodes and each transistor and resistor, the arrangement of the segment display electrodes is different from the actual arrangement of the segment display electrodes. Now, when the output from the switchboard 30 makes the transistors 21b, 22b, 23b, and 24b conductive and the other transistors nonconductive, the segment display electrodes 21, 22, 23, and 24 are biased to negative potential, and the other segment display electrode 25,
26 and 27 are biased to a positive potential, the E/C layer 4 above the segment display electrodes 21 to 24 is colored, and the E/C layer 4 above the remaining segment display electrodes 25 to 27 is decolored. . Next, the switchboard 30
The transistors 22b, 23b, 24b, 2
5b is made conductive, and the remaining transistors 21b, 2
When 6b and 27b are made non-conductive, the E and C layers above the segment display electrodes 22 to 25 are colored, and at the same time, the E and C layers above the segment display electrodes 21, 26 and 27 are discolored, and are different from the previous ones. A different display will occur. The function of the dummy electrode 28 provided at the right end and its transistors 28b and 28a is that the E/C layer 4 on all of the segment display electrodes 21 to 27
The goal is to form current paths for coloring and erasing the color. To explain in detail, the switchboard 30 is
When generating a signal that makes all transistors 21b to 27b conductive, transistor 2
8b is also generated, biasing the dummy electrode 28 to a positive potential and causing the segment electrode 21 to become non-conductive.
~27 are all biased to negative potential to form a current path. Also, the switchboard has transistors 21-2
When all of 7 are made non-conductive, transistor 2
8 is made conductive and a bias of opposite polarity is applied to each electrode to form a current path. In this latter case, since the E/C layer above the dummy electrode 28 is colored, a cover 31 is provided on the glass substrate 8 to shield the colored color from being visible from the outside.
In this way, in order to change the display contents, the conventional E.C.
In the case of devices, an electric field of opposite polarity, that is, a decoloring electric field, was always applied to the corresponding electrode, but according to the present invention, the application of the decolorizing electric field and the coloring electric field to obtain new display contents are combined. Since the application and application can be performed simultaneously by simply turning on and off the switching elements, the structure of the switchboard etc. can be simplified.
このように本発明によれば着色すべきセグメン
トと消色すべきセグメントとは、一対の関係を成
すので、Ｅ・Ｃ物質の着消色に寄与する電子が過
不足なく供給・抽出できるように消色すべき電極
の面積と着色すべ電極のそれとは等しいことが好
ましい。仮に両電極の面積が異なると、狭い方の
電極に電荷が供給される場合、電流密度が集中し
て電極が破損する恐れがある。従つて、例えば
「日」の字型のセブンセグメントで０〜９の10種
類の数字を表示しようとする場合、各セグメント
の面積は等しいことが好ましいし、例えば表示を
８から１に変えようとする場合、５個のセグメン
トを消色する必要あるが、それに見合う着色セグ
メントがないので同じ面積のダミーセグメント
（ダミー電極）を５個用意する必要がある。さも
なければ、５個分の面積を有する１個のダミーセ
グメント（ダミー電極）を用意しておく。 In this way, according to the present invention, the segment to be colored and the segment to be decolored form a pair relationship, so that electrons contributing to the coloring and decoloring of the E/C substance can be supplied and extracted in just the right amount. It is preferable that the area of the electrode to be decolored is equal to that of the electrode to be colored. If the areas of the two electrodes are different, and electric charges are supplied to the narrower electrode, the current density may be concentrated and the electrode may be damaged. Therefore, for example, if you are trying to display 10 types of numbers from 0 to 9 using seven segments in the shape of a "day" character, it is preferable that the area of each segment is equal.For example, if you want to change the display from 8 to 1, In this case, it is necessary to decolor five segments, but since there are no corresponding colored segments, it is necessary to prepare five dummy segments (dummy electrodes) with the same area. Otherwise, one dummy segment (dummy electrode) having an area of five segments is prepared.
尚、第２図ではセグメント表示電極２１〜２７
とダミー電極２８とは、同一平面内の連続した共
通電極１に対向しているが、共通電極１は電気的
に共通であればよいので各セグメント表示電極２
１〜２７とダミー電極とに対応して分割され、各
分割された共通電極間が導線で接続されていても
よい。この場合、Ｅ・Ｃ層４及びプロトン供給層
２も同様に分割されていてもよい。このように分
割されている実施態様は、表示電極及びダミー電
極の配置の自由度が広げられるので有利である。 In addition, in FIG. 2, segment display electrodes 21 to 27
The and dummy electrodes 28 face the continuous common electrode 1 in the same plane, but since the common electrode 1 only needs to be electrically common, each segment display electrode 2
The common electrodes may be divided corresponding to 1 to 27 and dummy electrodes, and each divided common electrode may be connected with a conductive wire. In this case, the E/C layer 4 and the proton supply layer 2 may be similarly divided. This divided embodiment is advantageous because the degree of freedom in arranging the display electrodes and dummy electrodes is increased.
以上の通り、本発明によれば表示内容を変える
場合、従来のように一旦消色した後、着色させる
のではなく着消色を同時に行なうことができるの
で、表示の変化に要する時間が短かく、またダミ
ー電極を設けてあるので、あらゆる表示内容の変
化に対応でき、そして消色するセグメントと着色
するセグメントとの電極面積の変化がが少なくて
済むことから電流密度の集中による電極破損の危
険が軽減される利点が得られる。 As described above, according to the present invention, when changing the display content, it is possible to simultaneously perform coloring and decoloring instead of decoloring and then coloring as in the conventional method, so the time required to change the display is shortened. In addition, since a dummy electrode is provided, it can respond to any change in display content, and there is little change in electrode area between the segment to be colored and the segment to be colored, so there is no risk of electrode damage due to concentration of current density. This has the advantage of reducing the
第１図は本発明の基礎となる原理を説明する
Ｅ・Ｃ素子の概略的説明図、第２図は本発明の実
施例にかかるＥ・Ｃ素子の概略的説明図である。
〔主要部分の符号の説明〕、１……共通電極
層、４……Ｅ・Ｃ物質層、６ａ，６ｂ……セグメ
ント電極、表示電極、ダミー電極、１０ａ，１０
ｂ……リード線。
FIG. 1 is a schematic explanatory diagram of an E/C element for explaining the basic principle of the present invention, and FIG. 2 is a schematic explanatory diagram of an E/C element according to an embodiment of the present invention. [Explanation of symbols of main parts], 1... common electrode layer, 4... E/C material layer, 6a, 6b... segment electrode, display electrode, dummy electrode, 10a, 10
b...Lead wire.
Claims (1)
極を有するセグメント電極層と、共通電極層とそ
してその両電極層にはさまれたエレクトロクロミ
ツク物質層とを備えたエレクトロクロミツク素子
において、前記複数個のセグメント電極を少なく
とも１個のダミー電極と残りの表示電極との２群
に分け、ダミー電極に接する部分のエレクトロク
ロミツク物質は外部から観察されないように遮へ
いし、前記ダミー電極か表示電極の一方に正電位
を、他方に負電位を印加することによつて、その
正電位印加電極と、これに接したエレクトロクロ
ミツク物質と、共通電極と、負電位印加電極に接
したエレクトロクロミツク物質と、負電位印加電
極とからなる電流路を形成し、これによりダミー
電極に接する部分のエレクトロクロミツク物質を
着色させるときには表示電極に接する部分のエレ
クトロクロミツク物質を同時に消色し、前者を消
色させるときには後者を同時に着色することを特
徴とする表示変化の速いエレクトロクロミツク素
子。 ２ 特許請求の範囲第１項に記載のエレクトロク
ロミツク素子において、セグメント電極層と、エ
レクトロクロミツク物質層及び共通電極層の層構
造を保ちつつ、複数のセグメント電極を分離する
様にエレクトロクロミツク素子を分割し、その分
割された共通電極をリード線によつて互いに電気
的に接続したことを特徴とするエレクトロクロミ
ツク素子。[Scope of Claims] 1. An electrode comprising a segment electrode layer having a plurality of segment electrodes electrically insulated from each other, a common electrode layer, and an electrochromic material layer sandwiched between the two electrode layers. In the chromic element, the plurality of segment electrodes are divided into two groups, at least one dummy electrode and the remaining display electrodes, and the electrochromic material in the portion in contact with the dummy electrode is shielded from being observed from the outside, By applying a positive potential to one of the dummy electrode or the display electrode and a negative potential to the other, the positive potential application electrode, the electrochromic substance in contact with it, the common electrode, and the negative potential application electrode are isolated. A current path is formed between the electrochromic material in contact with the dummy electrode and a negative potential applying electrode, and when coloring the electrochromic material in the part in contact with the dummy electrode, the electrochromic material in the part in contact with the display electrode is simultaneously colored. An electrochromic element with a fast display change characterized by decoloring and coloring the latter at the same time when decoloring the former. 2. In the electrochromic device according to claim 1, the electrochromic layer is formed so as to separate the plurality of segment electrodes while maintaining the layer structure of the segment electrode layer, the electrochromic material layer, and the common electrode layer. An electrochromic device characterized in that the device is divided and the divided common electrodes are electrically connected to each other by lead wires.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15081076A JPS5375951A (en) | 1976-12-17 | 1976-12-17 | Electrochromic element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15081076A JPS5375951A (en) | 1976-12-17 | 1976-12-17 | Electrochromic element |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5375951A JPS5375951A (en) | 1978-07-05 |
| JPS6124692B2 true JPS6124692B2 (en) | 1986-06-12 |
Family
ID=15504907
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15081076A Granted JPS5375951A (en) | 1976-12-17 | 1976-12-17 | Electrochromic element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5375951A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5790403B2 (en) * | 2010-12-07 | 2015-10-07 | 株式会社リコー | Electrochromic display device |
| US11966139B2 (en) | 2020-07-31 | 2024-04-23 | Ricoh Company, Ltd. | Electrochromic element, and method for driving the same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5225656A (en) * | 1975-08-21 | 1977-02-25 | Asahi Optical Co Ltd | Electrochromic display unit |
-
1976
- 1976-12-17 JP JP15081076A patent/JPS5375951A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5225656A (en) * | 1975-08-21 | 1977-02-25 | Asahi Optical Co Ltd | Electrochromic display unit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5375951A (en) | 1978-07-05 |
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