US 11,754,255 B2
Curved light-guide optics for LED street lighting
Frederic Stephane Diana, Santa Clara, CA (US); Mehdi Aas, Eindhoven (NL); and Charles André Schrama, San Jose, CA (US)
Assigned to Lumileds LLC, San Jose, CA (US)
Filed by Lumileds LLC, San Jose, CA (US)
Filed on Dec. 14, 2020, as Appl. No. 17/121,482.
Claims priority of provisional application 62/951,714, filed on Dec. 20, 2019.
Prior Publication US 2021/0190293 A1, Jun. 24, 2021
Int. Cl. F21V 5/04 (2006.01); F21S 8/08 (2006.01); F21Y 115/10 (2016.01)
CPC F21V 5/045 (2013.01) [F21S 8/086 (2013.01); F21V 2200/20 (2015.01); F21Y 2115/10 (2016.08)] 20 Claims
OG exemplary drawing
1. A streetlight luminaire comprising:
a curved light guide plate including:
a first receiving surface;
an emitting surface;
a major surface opposing the emitting surface;
second and third receiving surfaces on a streetside of the streetlight luminaire and an opposing house side of the streetlight luminaire, respectively, the first receiving surface extending in a first dimension between the major surface and the emitting surface, the first receiving surface, the emitting surface, and the major surface extending in a second dimension between the second and third receiving surfaces, the first dimension perpendicular to the second dimension, the first receiving surface, emitting surface, and major surface including a positive, non-zero radius of curvature (R) in the first dimension and the second and third receiving surfaces including an infinite radius of curvature in the first and second dimensions; and
a plurality of LEDs positioned to emit light into three or more of the first receiving surface, second receiving surface, third receiving surface, or a fourth receiving surface, the fourth receiving surface opposing the first receiving surface.