Display screen and method for secure representation of information

A display screen for secure representation of information comprising a background grid with light-emitting background grid elements of a first type and light-emitting or light-blocking background grid elements of a second type. A foreground grid (4) having completely light-transmissive foreground gr...

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Bibliographische Detailangaben
Hauptverfasser:	Daehnert Ullrich, Schwarz Juergen, Emmrich Sven
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 EDUCATION FREQUENCY-CHANGING NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS SEALS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
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Beschreibung
Zusammenfassung:	A display screen for secure representation of information comprising a background grid with light-emitting background grid elements of a first type and light-emitting or light-blocking background grid elements of a second type. A foreground grid (4) having completely light-transmissive foreground grid elements and light-attenuating foreground grid elements is arranged in front of the background grid. The lateral dimensions of the foreground grid elements, the distance and the lateral position of the foreground grid are matched in relation to the background grid in such a manner that a viewer looking at the foreground grid perceives coded information in a decoded form, on the basis of a contrast difference and/or color difference in relation to those fields of the background grid that are base-coded, only from one direction of view or one view angle range of up to ±50° about the view direction. Further, a method for secure representation of information on such a display screen.