Downlight with a shallow reflector and lightguide panel

Abstract

The invention provides a light generating system () comprising a light generating device (), a lightguide (), and a light collimating reflector (), wherein the light generating device () is configured to generate device light (); wherein the light generating device () comprises a solid state light source; wherein the lightguide () comprises a first lightguide face (), a second lightguide face (), and a side face () bridging the first lightguide face () and the second lightguide face (); wherein the lightguide () comprises light outcoupling elements () (comprised by one or more of lightguide faces () and/or arranged in the lightguide ()); wherein the first lightguide face () comprises a surface area A1; the first lightguide face () comprises (a) an inner surface part (), having an inner surface area A11, and (b) an outer surface part (), surrounding the inner surface part (), (the outer surface part ()) having an outer surface area A; wherein the outer surface area Ais at maximum 40% of the surface area A1; wherein the light generating device () and the lightguide () are configured such that (i) device light () enters the lightguide () via the side face (), to provide incoupled device light (), wherein the lightguide () is configured to guide at least part of the incoupled device light () via total internal reflection; and (ii) at least part of the incoupled device light () is coupled out from the lightguide () via the first lightguide face () to provide outcoupled device light (), wherein (the light outcoupling elements () are configured such that) more than 50% of the outcoupled device light () is coupled out via the outer surface part (); and wherein the light collimating reflector () comprises a first reflector side (), a second reflector side (), and a reflector wall () tapering from the first reflector side () to the second reflector side (); wherein the first reflector side () is configured further away from the first lightguide face () than the second reflector side (); and wherein the light collimating reflector () is configured to beamshape the outcoupled device light () emanating from the first lightguide face ().