US 11,885,485 B2
Light transmissive structures for redistribution of light and lighting systems including same
Ken G. Purchase, Morrisville, NC (US); and Bing Shen, Cary, NC (US)
Assigned to BRIGHTVIEW TECHNOLOGIES, INC., Durham, VA (US)
Filed by BRIGHTVIEW TECHNOLOGIES, INC., Durham, VA (US)
Filed on Mar. 22, 2022, as Appl. No. 17/700,990.
Application 17/700,990 is a continuation of application No. 16/625,830, granted, now 11,300,268, previously published as PCT/US2018/040268, filed on Jun. 29, 2018.
Claims priority of provisional application 62/527,573, filed on Jun. 30, 2017.
Prior Publication US 2022/0214023 A1, Jul. 7, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. F21V 5/00 (2018.01); G02B 5/02 (2006.01); G02B 5/04 (2006.01)
CPC F21V 5/005 (2013.01) [G02B 5/0215 (2013.01); G02B 5/0231 (2013.01); G02B 5/0257 (2013.01); G02B 5/045 (2013.01); G02B 5/0278 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A light transmissive structure comprising:
a light transmissive substrate having first and second opposing faces; and
an array of microprism elements on the first face, each microprism element comprising a first inclined surface disposed at a first inclined angle relative to the second face, and a second inclined surface disposed at a second inclined angle relative to the second face, the first inclined angle being less than the second inclined angle, the second inclined surface having a convex curvature when viewed from angles perpendicular thereto, and at least two adjacent microprism elements having the same first inclined angle relative to the second face and the same inclined angle relative to the second face,
wherein the light transmissive structure is configured to receive light emitted from a light source facing the first face in a first direction and redistribute light emerging from the second face in a second direction different from the first direction.