Diffusion globe LED lighting device
Disclosed is a lighting fixture that provides approximately even illumination across a planar surface. Also enclosed is an LED light for producing the same. In one embodiment, the light fixture includes a plurality of hollow gradient diffusion globes; each diffusion globe is affixed to a planar reflector that forms an outer illumination surface of the light fixture. Each diffusion globe surrounds a light-emitting portion of an LED or LED cluster. The hollow gradient diffusion globe can include a wall defining by the interior and exterior boundary of the diffusion globe. The wall includes diffusing-particulate homogenously distributed within the wall that in combination with varying thickness of the wall creates continuously varying diffusion. The relative spacing of the diffusion globes on the planar reflective surface in combination with the continuous variable diffusion property of each globe produce approximately even illumination across the outer illumination surface of the LED light fixture.
1. An LED lighting fixture, comprising:
(a) a front cover assembly of the LED lighting fixture comprising:
a plurality of hollow diffusion globes;
a planar reflective sheet, including a plurality of apertures arranged in a grid pattern;
each hollow diffusion globe of the plurality of hollow diffusion globes is secured to the planar reflective sheet into a corresponding aperture of the plurality of apertures; and
the plurality of hollow diffusion globes and the planar reflective sheet, in combination, forming a front outside surface of the LED lighting fixture;
each hollow diffusion globe comprises a wall bound by an exterior surface having a shape of a globe, a wall of varying thickness with a thickest wall portion facing opposite the corresponding aperture of the plurality of apertures, a diffusing-particulate homogenously distributed within the wall, and the wall and the diffusing-particulate in combination form a continuously graduated diffusive surface;
(b) a backplane assembly comprising:
a planar heatsink, including opposing front and back planar surfaces, the back planar surface forming a back outside surface of the LED lighting fixture;
a plurality of LED clusters arranged in the grid pattern corresponding to the plurality of apertures, the plurality of LED clusters thermally coupled to the planar heatsink; and
the front cover assembly is wholly removably securable to the backplane assembly.
2. The LED lighting fixture of claim 1 wherein:
the plurality of apertures are so arranged so that the planar reflective sheet and plurality of diffusion globes in combination form an even illumination surface.