Luminous display device

The display device comprises a light source, a uniform layer Ca of semi-reflecting material of small thickness and illuminated by the light source, a uniform layer Cb of transparent material having a refractive index n and a thickness e deposited on the layer Ca, the optical thickness of the layer C...

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Bibliographische Detailangaben
Hauptverfasser:	MEYER, ROBERT, GUYON, PIERRE
Format:	Patent
Sprache:	eng
Schlagworte:	ADVERTISING ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION 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 LABELS OR NAME-PLATES NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS SEALS SIGNS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
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Beschreibung
Zusammenfassung:	The display device comprises a light source, a uniform layer Ca of semi-reflecting material of small thickness and illuminated by the light source, a uniform layer Cb of transparent material having a refractive index n and a thickness e deposited on the layer Ca, the optical thickness of the layer Cb being constant and equal to ne as measured at right angles to the surface, a reflecting layer Cc deposited on at least part of the layer Cb in order to form the patterns which are intended to be displayed.