Lighting devices with differential light transmission regions
AssigneeCree, Inc.
InventorAntony Paul van de Ven
Life of this patent
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Abstract
A LED lamp including a cover with first and second transmissive regions that differently affect light emissions (e.g., with respect to diffusion, color, or other characteristics) transmitted therethrough. One or more apertures may be defined in a diffusive cover for a LED lamp to permit flow of air and escape of heat, and also to permit escape of directly emitted or reverse scattered light proximate to a base of the LED lamp. Multiple diffuser segments may be overlapped with intervening apertures.
Claims49
A light emitting diode (LED) lamp comprising:
- a cover bounding an interior volume;
- and
- at least one LED disposed within the interior volume and supported by a support structure;
- wherein the cover includes (i) a non-diffusing portion proximate to the support structure and arranged to permit passage of substantially undiffused light, and (ii) a diffusing portion distal from the support structure and arranged to permit passage of diffused light
- wherein the LED lamp comprises at least one of the following features (a) and (b):
- (a) the non-diffusing portion comprises at least one opening;
- and
- (b) the diffusing portion comprises at least one aperture.
A light emitting diode (LED) lamp comprising:
- a cover bounding an interior volume;
- at least one LED disposed within the interior volume and supported by a support structure;
- wherein the cover includes a first transmissive region proximate to the support structure and a second transmissive region distal from the support structure;
- and
- wherein, relative to one another, the first transmissive region and the second transmissive region differently affect at least one of (a) diffusion, and (b) color, of LED light emissions transmitted therethrough and
- wherein the LED lamp comprises at least one of the following features (i) and (ii):
- (i) at least one opening is defined in the first transmissive region;
- and
- (ii) at least one aperture is defined in the second transmissive region.
A light emitting diode (LED) lamp comprising:
- a cover including a plurality of diffuser portions and defining an interior volume;
- and
- at least one LED disposed within the interior volume and supported by a support structure;
- wherein the cover comprises at least one aperture defined between the plurality of diffuser portions, and the plurality of apertures permits fluid communication between the interior volume and an ambient environment.
Dependencies are inferred from the claim text.