US 11,852,858 B2
Lateral edge-lit light-guide optics for LED lighting
Frederic Diana, San Jose, CA (US); Ken Ratica, San Jose, CA (US); and Carlos Rodriguez, San Jose, CA (US)
Assigned to Lumileds LLC, San Jose, CA (US)
Filed by LUMILEDS LLC, San Jose, CA (US)
Filed on Oct. 19, 2021, as Appl. No. 17/505,504.
Claims priority of provisional application 63/094,042, filed on Oct. 20, 2020.
Prior Publication US 2022/0120954 A1, Apr. 21, 2022
Int. Cl. F21V 8/00 (2006.01)
CPC G02B 6/0031 (2013.01) [G02B 6/0083 (2013.01); G02B 6/0085 (2013.01); G02B 6/0088 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A luminaire, comprising:
a light guide plate having a top surface, a bottom surface, and an edge surface connecting the top and bottom surfaces, the light guide plate configured so that light entering the edge surface is redirected to exit the top surface;
a printed circuit board having a frontside and a backside, the frontside of the printed circuit board attached to the bottom surface of the light guide plate and positioned such that the frontside of the printed circuit board is substantially parallel with the top surface of the light guide plate;
at least one surface-emitting LED attached to the frontside of the printed circuit board, a light extraction surface of the surface-emitting LED positioned substantially parallel to the top surface of the light guide plate, the at least one surface-emitting LED positioned on the printed circuit board adjacent to the edge surface of the light guide plate; and
a partially transmissive reflector attached to the top surface of the light guide plate and to the printed circuit board, the partially transmissive reflector positioned to transmit light emitted from the at least one surface-emitting LED and to reflect light emitted from the at least one surface-emitting LED into the edge surface of the light guide plate, at least some of the light reflected into the edge surface of the light guide plate exits the top surface of the light guide plate.