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AssigneeKoninklijke Philips Electronics N.V.
InventorsFetze Pijlman, Michel C.J.M. Vissenberg, Marcellinus P.C.M. Krijn, Lars C. Casper
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The invention relates to an illumination system (10), a backlighting system and a display device. The illumination system comprises a light source (20) configured to emit light via a light guide (30) to a light exit window (40) of the illumination system. The light guide has a front wall (32) arranged opposite a rear wall (34) so as to guide light in a direction substantially parallel to the front wall. A distance (D) between the light guide (30) and the light exit window (40) reduces towards an edge (42) of the light exit window (40). The light guide (30) further comprises a light entrance window (36) for receiving the light from the light source which is arranged away from the edge of the light exit window. The illumination system according to the invention has, inter alia, the effect that its thickness may be reduced at the edge of the light exit window.
An illumination system comprising a light source configured to emit light via a light guide to a light exit window of the illumination system, the light guide having a front wall arranged opposite a rear wall and being adapted to guide light in a direction substantially parallel to the front wall, the light guide comprising light-outcoupling structures for redirecting at least part of the guided light towards the light exit window via the front wall for generating a predetermined light distribution across the light exit window, the light guide further comprising a light entrance window for receiving the light from the light source, the light entrance window being arranged away from an edge of the light exit window and being arranged at a normal axis (n) of the light exit window, a distance (D) between the front wall of the light guide and the light exit window reducing towards two opposite edges of the light exit window.
Dependencies are inferred from the claim text.