Lighting device and luminaire
AssigneeKoninklijke Philips N.V.
InventorsLEI SUI, ZHI QUAN CHEN, HUAIZHOU LIAO, FENG HE
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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.
Claims7
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.
-10. (canceled)
The lighting device of claim 10, further comprising a housing, wherein the solid state lighting elements are mounted on said housing.
The lighting device of claim 10, wherein the driver circuit has a circular shape matching said central recess.
Dependencies are inferred from the claim text.