US 11,982,440 B1
Lens to produce wide angle light output in high density LED arrays
Qi Hong, Morganville, NJ (US)
Assigned to Dialight Corporation, Farmingdale, NJ (US)
Filed by Dialight Corporation, Farmingdale, NJ (US)
Filed on Jun. 9, 2023, as Appl. No. 18/332,154.
Int. Cl. F21V 5/04 (2006.01); F21V 5/00 (2018.01); F21Y 115/10 (2016.01); G02B 13/06 (2006.01)
CPC F21V 5/048 (2013.01) [F21V 5/007 (2013.01); F21Y 2115/10 (2016.08); G02B 13/06 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A lens for a light emitting diode (LED) assembly comprising:
an input surface, comprising:
a first input surface segment;
a second input surface segment; and
a third input surface segment, wherein the second input surface segment is positioned to redirect light emitted at angles of 20 degrees to 90 degrees by an LED of the LED assembly, wherein the first input surface segment and the third input surface segment have a cross-sectional curve that curves away from the LED and the second input surface segment has a cross-sectional curve that curves towards the LED; and
an output surface, comprising:
a first output surface segment; and
a second output surface segment, wherein the second output surface segment and the second input surface segment form a convex lens and the second output surface segment is positioned to receive and redirect a portion of the light that are redirected by the second input surface segment to a second range of angles comprising 45 degrees to 50 degrees.