US 12,234,984 B2
Lens for improved color mixing and beam control of an LED light source
Fangxu Dong, Austin, TX (US)
Assigned to Lutron Technology Company LLC, Coopersburg, PA (US)
Filed by Lutron Technology Company LLC, Coopersburg, PA (US)
Filed on Feb. 2, 2024, as Appl. No. 18/431,165.
Application 18/431,165 is a continuation of application No. 18/154,923, filed on Jan. 16, 2023, granted, now 11,920,780.
Application 18/154,923 is a continuation of application No. 17/827,118, filed on May 27, 2022, granted, now 11,555,597, issued on Jan. 17, 2023.
Application 17/827,118 is a continuation of application No. 16/819,375, filed on Mar. 16, 2020, granted, now 11,346,527, issued on May 31, 2022.
Application 16/819,375 is a continuation in part of application No. 15/498,671, filed on Apr. 27, 2017, granted, now 10,591,134, issued on Mar. 17, 2020.
Application 15/498,671 is a continuation in part of application No. 15/000,469, filed on Jan. 19, 2016, granted, now 11,106,025, issued on Aug. 31, 2021.
Application 16/819,375 is a continuation in part of application No. 15/000,469, filed on Jan. 19, 2016, granted, now 11,106,025, issued on Aug. 31, 2021.
Prior Publication US 2024/0230061 A1, Jul. 11, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. F21V 5/04 (2006.01); F21K 9/66 (2016.01); F21K 9/68 (2016.01); F21K 9/69 (2016.01); F21V 5/00 (2018.01); F21V 7/00 (2006.01); F21V 7/06 (2006.01); F21Y 115/10 (2016.01); G02B 3/00 (2006.01); G02B 19/00 (2006.01)
CPC F21V 5/04 (2013.01) [F21K 9/66 (2016.08); F21K 9/68 (2016.08); F21K 9/69 (2016.08); F21V 5/007 (2013.01); G02B 3/00 (2013.01); G02B 19/0028 (2013.01); G02B 19/0061 (2013.01); F21V 7/0091 (2013.01); F21V 7/06 (2013.01); F21Y 2115/10 (2016.08)] 11 Claims
OG exemplary drawing
 
1. A lens to receive light from a plurality of light-emitting diodes (LEDs), the lens comprising:
a lens body that includes:
a cylindrical light entrance surface rotated about a central axis, wherein the cylindrical light entrance surface includes an open light entry region, a sidewall surface portion, and a top surface portion; and wherein the sidewall surface portion of the cylindrical entrance surface includes a first plurality of lunes; and
a total internal reflection (TIR) outer surface rotated about the central axis, the TIR outer surface shaped as a compound parabolic concentrator (CPC), the TIR outer surface including a second plurality of lunes; and
a concave light exit surface rotated about the central axis.