FRONT-LIT REFLECTIVE DISPLAY

A reflective display device and a method of making or operating the display device, where the reflective display device includes a spatial reflective light valve, at least one light emitting element being positioned in front of the spatial reflective light valve and light shaping device to direct th...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	TYDTGAT, Claude Daniel, VAN DEN BOSSCHE, Bart
Format:	Patent
Sprache:	eng
Schlagworte:	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 FREQUENCY-CHANGING NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS PHYSICS TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
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Beschreibung
Zusammenfassung:	A reflective display device and a method of making or operating the display device, where the reflective display device includes a spatial reflective light valve, at least one light emitting element being positioned in front of the spatial reflective light valve and light shaping device to direct the light generated by the at least one light emitting element in defined directions with respect to the spatial reflective light valve. This makes use of the fact that the contrast improves and the diffuse reflection component of the reflective display increases when the illumination direction gets closer to the perpendicular direction but rays close to the perpendicular direction need to be reduced in intensity or better still avoided to reduce the specular component. This can use illumination directions close to the perpendicular direction while preventing or reducing specular reflection within a range of incident angles.