EP 1881265 B1 20091223 - Lighting device comprising a planar lightguide with a light reflecting portion having the shape of an arc of a circle
Title (en)
Lighting device comprising a planar lightguide with a light reflecting portion having the shape of an arc of a circle
Title (de)
Beleuchtungseinrichtung mit einer Lichtleiterplatte, die eine kreisbogenförmige, rückstrahlende Reflexionsfläche aufweist
Title (fr)
Dispositif d'éclairage muni d'une nappe de guidage comportant une tranche de renvoi en arc de cercle
Publication
Application
Priority
FR 0606717 A 20060721
Abstract (en)
[origin: EP1881265A1] The device (10) has a flat transversal light guiding sheet (12) including an angular sector around a point light source e.g. side-emitter type LED, axis (S). The sector forms an elementary portion of an outer return edge (18), where the portion is conformed in a manner so that a meridian propagation plane (M) of a light ray reaching the portion is perpendicular to points at the portion. The portion is inclined in a manner so that the ray is totally reflected in a direction of a longitudinal optical orientation axis by traversing light ray guiding surfaces (14, 16) to form a linear light beam.
IPC 8 full level
F21S 8/10 (2006.01); F21W 101/10 (2006.01)
CPC (source: EP)
F21S 43/239 (2017.12); F21S 43/243 (2017.12); F21S 43/247 (2017.12)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
EP 1881265 A1 20080123; EP 1881265 B1 20091223; AT E453085 T1 20100115; DE 602007003904 D1 20100204; ES 2336265 T3 20100409; FR 2904092 A1 20080125
DOCDB simple family (application)
EP 07112943 A 20070723; AT 07112943 T 20070723; DE 602007003904 T 20070723; ES 07112943 T 20070723; FR 0606717 A 20060721