Patent ID: 11947154
Assignee: SIGNIFY HOLDING B.V.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G | IPC F  G

Claim 0:
1. Luminaire comprising:
a stack of parallel light transmissive plates comprising a light guide plate and an optical plate,
wherein the light guide plate comprises a first and a second major light guide surface connected by an edge-wall along which LEDs are arranged and, in operation, is edge-lit by the LEDs, at least one of the major light guide surfaces is provided with a light outcoupling structure comprising outcoupling elements arranged at a substantially constant first pitch P1 in an x-direction and P1a in an y-direction perpendicular to an x-direction,
the optical plate comprises a first and a second major optical surface, the first major optical surface facing towards the second major light guide surface and only one of the first and second major optical surfaces being provided with an optical structure comprising optical elements arranged at a substantially constant second pitch P2,
wherein the second major light guide surface and the first major optical surface are spaced apart in a direction perpendicular to the major light guide surface by a spacing S, with S being in the range of 0-25 mm, preferably 5-9 mm,
wherein P1, P1a and P2 are in the range of 1-7 mm, preferably 1.5-6 mm and ratios P1/P2 and P1a/P2 are in the range of 0.5-2.