Lighting device and luminaire

Patent metadata

Field	Value
Publication number	US-2016103268-A1
Application number	US-201414779816-A
Country	US
Kind code	A1
Filing date	Mar 12, 2014
Priority date	Mar 26, 2013
Publication date	Apr 14, 2016
Grant date	—

Abstract

Disclosed is a lighting device comprising an exit window ( 30 ); a plurality of solid state lighting elements ( 20 ) arranged in an annular pattern; an optical element ( 10, 50 ) for redirecting the luminous output of the solid state lighting elements towards said exit window, the shape of said optical element defining a cavity ( 15 ) on a central axis of the lighting device, said cavity being shielded from said luminous output; and a driver circuit ( 40 ) for driving at least some of said solid state lighting elements located in said cavity. A luminaire including such a lighting device is also disclosed.

First claim

1 . A lighting device comprising:
an exit window; a plurality of solid state lighting elements arranged in an annular pattern; an optical element for redirecting the luminous output of the solid state lighting elements towards said exit window, the shape of said optical element defining a cavity on a central axis of the lighting device, said cavity being shielded from said luminous output; and a driver circuit for driving at least some of said solid state lighting elements located in said cavity; wherein the optical element comprises an annular light guide plate having a central recess defining said cavity, and wherein the solid state lighting elements are arranged along the outer perimeter of the annular light guide plate, the solid state lighting elements being arranged to couple their luminous output into the annular light guide plate.

2 .- 10 . (canceled)

11 . The lighting device of claim 10 , further comprising a housing, wherein the solid state lighting elements are mounted on said housing.

12 . The lighting device of claim 10 , wherein the driver circuit has a circular shape matching said central recess.

13 . The lighting device of claim 1 , further comprising a first reflective member in between the driver circuit and the annular light guide plate.

14 . The lighting device of claim 1 , further comprising a further reflective member on a major surface of the annular light guide plate such that the annular light guide plate is located in between the further reflective member and the exit window.

15 . A luminaire comprising the lighting device of claim 1 .

Assignees

• Koninkl Philips Nv

Inventors

• Sui Lei
• Chen Zhi Quan
• Liao Huaizhou
• He Feng

Classifications

• F21V7/0008 Primary

  providing for indirect lighting · CPC title

• F21V7/0058

  adapted to cooperate with light sources of shapes different from point-like or linear, e.g. circular light sources · CPC title

• F21Y2103/33

  annular · CPC title

• F21Y2103/30

  curved · CPC title

• G02B6/0073

  Light emitting diode [LED] · CPC title