OPTICAL COLOR DEVELOPING ELEMENT

PURPOSE:To make it possible to write a fine high-density pattern and to erase it easily, by constituting a double-layered structute consisting of a color developing layer and an ion supply source and irradiating it to develop a color and applying an electric field to erase the color. CONSTITUTION:A...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	KITAHATA MAKOTO, SETSUNE KENTAROU, YAMAZAKI OSAMU, MITSUYU TSUNEO, WASA KIYOTAKA, HIROCHI KUMIKO
Format:	Patent
Sprache:	eng
Schlagworte:	ADVERTISING CRYPTOGRAPHY DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING DISPLAY DISPLAYING EDUCATION FREQUENCY-CHANGING INFORMATION STORAGE LABELS OR NAME-PLATES NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS SEALS SIGNS STATIC STORES TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
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Beschreibung
Zusammenfassung:	PURPOSE:To make it possible to write a fine high-density pattern and to erase it easily, by constituting a double-layered structute consisting of a color developing layer and an ion supply source and irradiating it to develop a color and applying an electric field to erase the color. CONSTITUTION:A color developing layer 1 and an ion supply source 2 are provided close to each other and are held between ultraviolet ray-transmittable electrodes 3 and 4. When light 6 is irradiated, ultraviolet rays 6 are transmitted through the ultraviolet ray-transmissive electrode 3 and act upon an interface 7 between the color developing layer 1 and the ion supply source 2. This optical energy gives an energy E to cause a reaction, and color develops only in a part 8 to which the light is irradiated. When a voltage is applied across electrodes 3 and 4, color is erased, and this element is returned to the state before color development. Thus, a fine high-density pattern can be written and can be erased easily.