公开(公告)号：US20170242182A1

公开(公告)日：2017-08-24

申请号：US15437872

申请日：2017-02-21

申请人： Lumileds LLC

发明人： Frederic S. Diana ,  Gregory Guth ,  Jeroen Den Breejen ,  Iain Black

IPC分类号： F21V8/00 ,  F21S8/08

CPC分类号： G02B6/0038 ,  F21K9/61 ,  F21S8/086 ,  F21W2131/103 ,  F21Y2103/10 ,  F21Y2103/33 ,  F21Y2105/18 ,  F21Y2115/10 ,  G02B6/0018 ,  G02B6/0036 ,  G02B6/0043 ,  G02B6/0046 ,  G02B6/0055 ,  G02B6/0058 ,  G02B6/0068 ,  G02B6/0073

摘要： In one embodiment, an overhead street light (a luminaire) is formed that has an asymmetric light intensity distribution, where the peak intensity is greatest along the direction of the street, lower directly across the street, and much lower on the house side of the street. Around the edge of a circular transparent light guide are white light LEDs that inject light into the light guide. To help control the asymmetry of the light intensity distribution, sawtooth-shaped grooves are formed in the light guide surface opposite to the light-emission surface and parallel to the street. Gaussian diffusers are used to partially diffuse the light. By proper selection of the grooves, the Gaussian diffuser, and the relative amounts of light emitted by LED segments around the light guide, the desired asymmetrical light intensity distribution is achieved while a direct view of the light exit surface appears as a uniform light.

公开(公告)号：US10890709B2

公开(公告)日：2021-01-12

申请号：US16535579

申请日：2019-08-08

申请人： Lumileds LLC

发明人： Frederic S. Diana ,  Gregory Guth ,  Jeroen Den Breejen ,  Iain Black

IPC分类号： F21V8/00 ,  F21K9/61 ,  F21S8/08 ,  F21Y103/33 ,  F21Y103/10 ,  F21W131/103 ,  F21Y105/18 ,  F21Y115/10

摘要： In one embodiment, an overhead street light (a luminaire) is formed that has an asymmetric light intensity distribution, where the peak intensity is greatest along the direction of the street, lower directly across the street, and much lower on the house side of the street. Around the edge of a circular transparent light guide are white light LEDs that inject light into the light guide. To help control the asymmetry of the light intensity distribution, sawtooth-shaped grooves are formed in the light guide surface opposite to the light-emission surface and parallel to the street. Gaussian diffusers are used to partially diffuse the light. By proper selection of the grooves, the Gaussian diffuser, and the relative amounts of light emitted by LED segments around the light guide, the desired asymmetrical light intensity distribution is achieved while a direct view of the light exit surface appears as a uniform light.

公开(公告)号：US10416370B2

公开(公告)日：2019-09-17

申请号：US15437872

申请日：2017-02-21

申请人： Lumileds LLC

发明人： Frederic S. Diana ,  Gregory Guth ,  Jeroen Den Breejen ,  Iain Black

IPC分类号： F21V8/00 ,  F21S8/08 ,  F21K9/61 ,  F21Y105/18 ,  F21Y115/10 ,  F21W131/103 ,  F21Y103/10 ,  F21Y103/33

摘要： In one embodiment, an overhead street light (a luminaire) is formed that has an asymmetric light intensity distribution, where the peak intensity is greatest along the direction of the street, lower directly across the street, and much lower on the house side of the street. Around the edge of a circular transparent light guide are white light LEDs that inject light into the light guide. To help control the asymmetry of the light intensity distribution, sawtooth-shaped grooves are formed in the light guide surface opposite to the light-emission surface and parallel to the street. Gaussian diffusers are used to partially diffuse the light. By proper selection of the grooves, the Gaussian diffuser, and the relative amounts of light emitted by LED segments around the light guide, the desired asymmetrical light intensity distribution is achieved while a direct view of the light exit surface appears as a uniform light.