The invention relates to a diffusion screen made up of a sheet (10) of transparent material to form a light guide with an internal face (Fi), an external face (Fe) and at least one lateral light input zone (12) configured to direct the light coming from the lateral light source (11) into the sheet (10), the internal face (Fi) comprising, in a diffusion zone (Z), cavities (20) that are at least partially conical and which are distributed over the diffusion zone (Z), the sheet (10) having a thickness (e) comprised between 1 mm and 8 mm and the dimensions of the cavities (20) being chosen so that when the sheet (10) is illuminated by a normal beam, the cavities (20) are not individually visible to an observer of 10/10 visual acuity looking at the external face in a normal direction from a distance of more than 50 cm.
ECRAN DE DIFFUSION TRANSPARENT ET FEU DE VÉHICULE METTANT EN OEUVRE CET ECRAN DE DIFFUSION
TRANSPARENT DIFFUSION SCREEN AND VEHICLE LIGHT USING THIS DIFFUSION SCREEN
TRANSPARENTER DIFFUSIONSSCHIRM UND FAHRZEUGBELEUCHTUNG MIT DIESEM DIFFUSIONSSCHIRM
2020-03-25
Patent
Electronic Resource
French
IPC: | B60Q ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL , Anordnung von Signal- oder Beleuchtungsvorrichtungen, deren Einbau oder Halterung oder deren Schaltkreise bei Fahrzeugen allgemein / F21S Ortsfeste Leuchten , NON-PORTABLE LIGHTING DEVICES / F21V FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF , Funktionsmerkmale oder Einzelheiten von Leuchten oder Beleuchtungssystemen |
ECRAN DE DIFFUSION TRANSPARENT ET FEU DE VÉHICULE METTANT EN ŒUVRE CET ECRAN DE DIFFUSION
European Patent Office | 2017
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