JPS60202429A - Optical coloring element - Google Patents

Optical coloring element

Info

Publication number
JPS60202429A
JPS60202429A JP59058754A JP5875484A JPS60202429A JP S60202429 A JPS60202429 A JP S60202429A JP 59058754 A JP59058754 A JP 59058754A JP 5875484 A JP5875484 A JP 5875484A JP S60202429 A JPS60202429 A JP S60202429A
Authority
JP
Japan
Prior art keywords
coloring
electrode
ultraviolet rays
film
light
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
JP59058754A
Other languages
Japanese (ja)
Inventor
Kumiko Hirochi
廣地　久美子
Makoto Kitahata
真 北畠
Osamu Yamazaki
山崎　攻
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP59058754A priority Critical patent/JPS60202429A/en
Publication of JPS60202429A publication Critical patent/JPS60202429A/en
Pending legal-status Critical Current

Links

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 
    • G02F1/17—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 variable-absorption elements not provided for in groups G02F1/015 - G02F1/169

Abstract

PURPOSE:To obtain a display element to be written at a high speed in spite of a low power light source by irradiating light to a coloring part and a display body consisting of a film adhered to the coloring part and having a photoelectric effect. CONSTITUTION:A thin film of amorphous Si is used as a film 3 having the photoelectric effect and ultraviolet rays 7 are irradiated from the electrode 4 side by using a mercury lamp. An ITO thin film transmitting ultraviolet rays and visual rays is used as the electrode 4 and quartz glass transmitting ultraviolet rays is used as a substrate 6. The ultraviolet rays 7 are transmitted through the substrate 6 and the electrode 4 and irradiating to the film 3 having the photoelectric effect electrons are excited and supplied to the coloring layer, the color of the coloring layer 1 is changed and coloring of blue is confirmed. The ultraviolet rays 7 can be also irradiated from the electrode 5 side. When negative and positive potential is applied to the electrode 4 on the coloring layer side and the electrode 3 on the ion feeding layer side respectively at a degree preventing the coloring layer from coloring due to the energy of the electric field, coloring of blue can be confirmed even if ultraviolet rays of low intensity is irradiated.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、光照射を利用した発光素子に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a light emitting device that utilizes light irradiation.

従来例の構成とその問題点 従来、色の変化を示すものに、エレクトロクロミック素
子、７オトクロ′ミツク素子などが知られている。エレ
クトロクロミック素子は、発色も消去も電界の印加によ
って行なっており、電極の形状によってパターンを形成
していた。そのため、外部より直接、容易に書き込み表
示することは、困難であり、簡単なディスプレイとして
使用されるだけであった。また、７オトクロミソク素子
は、光で色の変化を示すが、色の変化は目で確認できる
のに数分〜数十分の時間を要し、光源も紫外光にかぎら
れ、１だ、消去に他の波長の光源を必要とし、構成が複
雑とｈす、実用化には多くの問題を有していた。また、
フォトクロミック素子と同様に、光照射により色を変化
させ、電圧印加することにより消去する従来の表示素子
では、色の変化に時間を要する、あるいは犬・々ワーの
光源を必要とし、素子の寿命が短いなどの問題と紫外光
を必要とし、紫外先約３００ｎｍを透過する電極作成が
困難であるなどの点で実用化に耐え得るものでなかった
。Conventional Structures and Their Problems Conventionally, electrochromic devices, 7-otochromic devices, and the like are known as devices that exhibit color changes. Electrochromic elements produce and erase color by applying an electric field, and the pattern is formed by the shape of the electrodes. Therefore, it is difficult to easily write and display data directly from the outside, and it has only been used as a simple display. In addition, the 7 otochromisoku element changes color with light, but it takes several minutes to several tens of minutes for the color change to be visible to the naked eye, and the light source is limited to ultraviolet light. However, it requires a light source with a different wavelength and has a complicated configuration, which poses many problems for practical use. Also,
Similar to photochromic devices, conventional display devices that change color by irradiation with light and erase it by applying voltage take time to change color or require multiple light sources, which can shorten the lifespan of the device. It was not suitable for practical use because it was short, required ultraviolet light, and it was difficult to create an electrode that would transmit light beyond the ultraviolet wavelength of about 300 nm.

そこで、本発明者等は、光電効果を有する膜と発色部を
密着させ、光を照射することにより、色の変化を容易に
行うことができることを発見し、それに基づいて、より
長波長の光線で発色可能であり、電圧によって消去でき
る長寿命型、非接触あるいは接触で記入可能な発色素子
を発明した０発明の目的 本発明の目的は、低ノくワー光源で高速度に書き込み可
能な表示素子を提供するものである。Therefore, the present inventors discovered that it is possible to easily change the color by bringing a film with a photoelectric effect into close contact with a coloring part and irradiating it with light. The inventor invented a long-life coloring element that can be colored by electricity and can be erased by voltage, and which can be written on in a non-contact or contact manner.Objective of the Invention The object of the invention is to provide a display that can be written at high speed with a low-power light source. It provides an element.

発明の構成 本発明は、発色部とこの発色部に密着して設けた光電効
果を有する膜から介る表示体に光照射を行うことにより
、光電効果を有する膜より発生する電子が発色部と相互
作用することにより色の変化を生じ、表示することを特
徴とする４、本発明者等は、発色部として、発色層とこ
の発色層に密着して設けたイオン供給層から在る２層構
造を用いると、光照射により発色し、表示体に電界を加
えることにより、電子、イオンの移動が起こり、表示が
瞬時に消去されることを見い出した。また、光照射の際
、イオン、電子が発色層に移動するような方向に、電界
のみで幻、発色しない程度の電界を表示体に加えておけ
ば、より強度の弱い光で、色の変化を示すことを本発明
者等は確認した。さらに、上記発色層としては、リチウ
ムとタングステンの混合酸化物の不活性ガス雰囲気′ス
・酸素雰囲気中でのス・（ツタ膜が本発明の光学表示素
子として特に有効であることを確認した。Structure of the Invention The present invention is characterized in that by irradiating light onto a display body through a coloring part and a film having a photoelectric effect provided in close contact with the coloring part, electrons generated from the film having a photoelectric effect can interact with the coloring part. 4. The present inventors have developed a method of producing and displaying a color change by interacting with each other. It was discovered that when this structure is used, color is developed by light irradiation, and by applying an electric field to the display, electrons and ions move, and the display is instantly erased. In addition, if an electric field is applied to the display in the direction in which ions and electrons move to the color-forming layer when irradiated with light, and the electric field alone does not produce color, it is possible to change the color with weaker light. The present inventors have confirmed that. Furthermore, as the coloring layer, it was confirmed that a sulfur (ivy) film of a mixed oxide of lithium and tungsten in an inert gas atmosphere or an oxygen atmosphere is particularly effective as the optical display element of the present invention.

実施例の説明 図に本発明の光学表示素子の実施例を示す。発色層１と
イオン供給層２を密着して設け、発色層に密着して光電
効果を有する膜３を設け、たとえば照射光に対し透過性
の電極４と可視光に透過性の電極５ではさむ。少なくと
も一方が照射光に対し透過性で、また、少なくとも一方
が読み取る光に対し透過性であればよい。この６層構造
は照射光に対し透過性の基板θ上に形成されているが、
機械的に安定であれば必ずしも基板６は必要でない。発
色層１としてリチウムとタングステンの混合酸化物の不
活性ガスたとえばアルゴン雰囲気中でのスパッタ膜を、
イオン供給層２としてリチウｌ、とタングステンの混合
酸化物の不活性ガス、たとえばアルゴンと酸素の雰囲気
中でのスノ（ツタ膜を用いるどより効果的であることが
見い出された０！１．　、、、、光電効果を有する膜３
としてアモルファスＳｉ紫外光約３６０ｎｍと可視光を
透過させるＩＴＯ薄膜を用い、基板７には、紫外光を透
過させる石英ガラスを用いた。紫外光７は、基板７と電
極６を透過し光電効果を有する膜３に照射され、電子が
励起され発色層に供給され、発色層１の色に変化が見ら
れブルーの着色が確認された。可視光透過性のＩＴＯ薄
膜を電極５として用いた場合には電極６側からもブルー
の着色が確認された。紫外側の電極４に負、イオン供給
層側の電極３に正の　ブ光７は電極６側よりの照射も可
能である。発色層電位を、電界のエネルギーで発色しな
い程度に加えておくと、より強度の弱い紫外光を照射し
た場　、合においても、ブルーの着色が確認された。An example of the optical display element of the present invention is shown in the explanatory diagram of the example. A coloring layer 1 and an ion supply layer 2 are provided in close contact with each other, and a film 3 having a photoelectric effect is provided in close contact with the coloring layer, and is sandwiched between, for example, an electrode 4 that is transparent to irradiation light and an electrode 5 that is transparent to visible light. . It is sufficient that at least one of them is transparent to irradiation light, and at least one of them is transparent to reading light. This six-layer structure is formed on a substrate θ that is transparent to irradiated light.
The substrate 6 is not necessarily required as long as it is mechanically stable. As the coloring layer 1, a sputtered film of a mixed oxide of lithium and tungsten in an inert gas atmosphere, such as argon, is used.
It has been found that using a mixed oxide of lithium and tungsten as the ion supply layer 2 in an inert gas atmosphere, such as argon and oxygen, is more effective than using an ivy film. ,,, Film 3 with photoelectric effect
An amorphous Si ITO thin film that transmits about 360 nm of ultraviolet light and visible light was used as the substrate 7, and quartz glass that transmits ultraviolet light was used as the substrate 7. The ultraviolet light 7 transmitted through the substrate 7 and the electrode 6 and was irradiated onto the film 3 having a photoelectric effect, and electrons were excited and supplied to the coloring layer, and a change in the color of the coloring layer 1 was observed, confirming blue coloring. . When a visible light transparent ITO thin film was used as the electrode 5, blue coloring was also confirmed from the electrode 6 side. Negative light is applied to the electrode 4 on the ultraviolet side, and positive light is applied to the electrode 3 on the ion supply layer side.The light 7 can also be irradiated from the electrode 6 side. When the coloring layer potential was set to a level that did not cause coloration due to the energy of the electric field, blue coloration was confirmed even when irradiated with weaker ultraviolet light.

紫外光としてエキシマレーザ光を用いても、５０　ｍ　
Ｉ　／７　程度で発生した。照射光は、用いる光電効果
を有する膜の種類により決定され、可視光。Even if excimer laser light is used as ultraviolet light, the distance is 50 m.
It occurred at about I/7. The irradiation light is determined by the type of film with photoelectric effect used, and is visible light.

赤外光などでもよい。光をレンズによりしばるととによ
って微細々表示も可能であり、大面積の色の変化も可能
である。また、光電効果を有する膜を用いることによっ
て、光書き込みにより瞬時に表示することが確認された
。また、視野角依存性もなく、発色時と消色時で、Ｈｅ
　−Ｎｅレーザ光で１０ｄＢ以上の差が認められ、コン
トラストの大きな表示が瞬時に行なえ、消去時は、たと
えば発色層側の電極４に正、イオン供給層側の電極３に
負の電位数ボルトを印加することにより容易に瞬時に完
全消去できた。あるいは、平面発熱体を設け、熱的消去
もできることが見い出された。まだ、ここでは光電効果
を有する膜として、ａ−８ｔを用いた場合を説明したが
、Ｂ１Ｃｅ、ＣｓＴｅ。Infrared light may also be used. By confining the light with a lens, it is possible to display minute details, and it is also possible to change the color over a large area. Furthermore, it was confirmed that by using a film with a photoelectric effect, instantaneous display could be achieved by optical writing. In addition, there is no viewing angle dependence, and He
A difference of 10 dB or more is observed with -Ne laser light, and a display with a large contrast can be instantaneously performed.When erasing, for example, a positive potential of several volts is applied to the electrode 4 on the coloring layer side, and a negative potential of several volts is applied to the electrode 3 on the ion supply layer side. It was possible to completely erase it easily and instantaneously by applying a voltage. Alternatively, it has been found that thermal erasure can also be achieved by providing a flat heating element. Although the case where a-8t was used as a film having a photoelectric effect was explained here, B1Ce and CsTe.

Ｒｂ２Ｔｅ　、　ＡｇＢｒ　、　ＡｑＣｌ　、　ＭｑＯ
，Ｃａｂ、　ＳｒＯなどを用いた場合も本発明者らは、
有効に働くことを確認した。Rb2Te, AgBr, AqCl, MqO
, Cab, SrO, etc., the present inventors also found that
I confirmed that it works effectively.

発明の効果 以上のように本発輿は、光照射により瞬時に色の変化を
示し、容易に書き込み可能でかつ瞬時に消去ができる光
学素子を実現し、コントラストが大きく、大画面表示も
可能とした。また微細な書長波長の実用化可能な領域と
なり、この光学素子の工業的価値は非常に大きい。As described above, this device has realized an optical element that instantly changes color when irradiated with light, can be easily written on and can be erased instantly, has high contrast, and can be displayed on a large screen. did. In addition, this optical element has a very large industrial value because it is in the practical application range of a fine writing length wavelength.

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

図は本発明の感光表示板の一実施例の概略断面図である
。 １・・・・・・発色層、２・・・・・・イオン供給層、
３・・・・光電効果を有する膜、４，６・・・・電極、
６・・・・・基板、７・・・・光。The figure is a schematic cross-sectional view of one embodiment of the photosensitive display plate of the present invention. 1... Coloring layer, 2... Ion supply layer,
3... Film having a photoelectric effect, 4, 6... Electrode,
6...Substrate, 7...Light.

Claims (1)

【特許請求の範囲】 （１）発色部とこの発色部に密着して設けた光電効果を
有する膜からなる表示体に、光照射により色の変化を生
じさせることを特徴とする光学発色素子。 （２）発色部が発色層とこの発色層に密着して設けたイ
オン供給層の２層構造を有することを特徴とする特許請
求の範囲第１項記載の光学発色素子。 （３）表示体に電界を印加する機構を付加したことを特
徴とする特許請求の範囲第１項記載の光学発色素子。 （４）表示体に光照射の際、電界を印加することを特徴
とする特許請求の範囲第１項記載の光学発色素子。 （６）表示体に電界を印加する消去機構を付加したこと
を特徴とする特許請求の範囲第１項記載の光学発色素子
。 （６）発色層としてリチウムとタングステンの混合酸化
物の不活性ガス雰囲気中でのスパッタ膜を、イオン供給
層として上記リチウムとタングステンの混合酸化物の不
活性ガス・酸素雰囲気中でのスパッタ膜を用いることを
特徴とする特許請求の範囲第２項記載の光学発色素子。[Scope of Claims] (1) An optical coloring element characterized in that a display body consisting of a coloring part and a film having a photoelectric effect provided in close contact with the coloring part causes a color change when irradiated with light. (2) The optical coloring element according to claim 1, wherein the coloring part has a two-layer structure consisting of a coloring layer and an ion supply layer provided in close contact with the coloring layer. (3) The optical coloring element according to claim 1, further comprising a mechanism for applying an electric field to the display body. (4) The optical coloring element according to claim 1, wherein an electric field is applied when the display body is irradiated with light. (6) The optical coloring element according to claim 1, further comprising an erasing mechanism for applying an electric field to the display body. (6) A sputtered film of mixed oxide of lithium and tungsten in an inert gas atmosphere as a coloring layer, and a sputtered film of the above mixed oxide of lithium and tungsten in an inert gas/oxygen atmosphere as an ion supply layer. The optical coloring element according to claim 2, which is used.
JP59058754A 1984-03-27 1984-03-27 Optical coloring element Pending JPS60202429A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59058754A JPS60202429A (en) 1984-03-27 1984-03-27 Optical coloring element

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59058754A JPS60202429A (en) 1984-03-27 1984-03-27 Optical coloring element

Publications (1)

Publication Number Publication Date
JPS60202429A true JPS60202429A (en) 1985-10-12

Family

ID=13093322

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59058754A Pending JPS60202429A (en) 1984-03-27 1984-03-27 Optical coloring element

Country Status (1)

Country Link
JP (1) JPS60202429A (en)

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US10185197B2 (en) 2010-04-30 2019-01-22 View, Inc. Electrochromic devices
US10088729B2 (en) 2010-04-30 2018-10-02 View, Inc. Electrochromic devices
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US10345671B2 (en) 2014-09-05 2019-07-09 View, Inc. Counter electrode for electrochromic devices
US11422426B2 (en) 2014-09-05 2022-08-23 View, Inc. Counter electrode for electrochromic devices
US10684523B2 (en) 2014-09-05 2020-06-16 View, Inc. Counter electrode for electrochromic devices
US11327382B2 (en) 2014-11-26 2022-05-10 View, Inc. Counter electrode for electrochromic devices
US10228601B2 (en) 2014-11-26 2019-03-12 View, Inc. Counter electrode for electrochromic devices
US10585321B2 (en) 2014-11-26 2020-03-10 View, Inc. Counter electrode for electrochromic devices
US11960188B2 (en) 2014-11-26 2024-04-16 View, Inc. Counter electrode for electrochromic devices

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