A directionally active projection device is described that includes a planar display providing a pattern of information. The planar display includes regions of light transparency and regions for blocking light transmittance. The directionally active projection device also includes a lens arranged adjacent to the planar display, and a collection of light sources arranged as an array in a focal plane of the lens. Also described are methods of controlling directionally active projection devices. WO 2013/119692 PCT/US2013/024967 10105 UGHT SOURCES MASK FRESNEL 120' F OCAL POINT 'IUGHT SOURCE FOCAL LENGTH 104
DIRECTION ACTIVE PROJECTION
2018-12-13
Patent
Electronic Resource
English
IPC: | G08G Anlagen zur Steuerung, Regelung oder Überwachung des Verkehrs , TRAFFIC CONTROL SYSTEMS / E01F ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTION OF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, OR THE LIKE , Zusätzliche Baumaßnahmen, wie die Ausstattung von Straßen oder die bauliche Ausbildung von Bahnsteigen, Landeplätzen für Hubschrauber, Wegweisern, Schneezäunen oder dgl. / G09F DISPLAYING , Anzeigewesen / H05B ELECTRIC HEATING , Elektrische Heizung |
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