Light distribution using a light emitting diode assembly
AssigneeAltair Engineering, Inc.
InventorsDennis Siemiet, John Ivey, Francis Palazzolo
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Abstract
A fluorescent light tube retrofit with light emitting diodes (LEDs) that evenly distribute light to avoid bright spots is disclosed. One LED lighting unit includes a tubular housing and a plurality of LED assemblies mounted about a circumference of the tubular housing. LEDs face inward from a mounting surface that is angled offset of the tube. Alternatively, at least one LED can be oriented to emit light parallel to a tangent of the housing into a light pipe that curves inside at least a portion of the tubular housing.
Claims19
An LED lighting unit for replacing a conventional fluorescent bulb of a conventional fluorescent lighting fixture comprising:
- a tubular housing including at least one tube portion;
- and
- a plurality of LED assemblies spaced about a circumference of the tubular housing and extending in a longitudinal direction along the tubular housing;
- and wherein
- each of the plurality of LED assemblies includes a plurality of LED devices mounted on a respective mounting surface, and each mounting surface is angled offset from a tangent of the tubular housing that is centered at a mounting location of that mounting surface.
An LED lighting unit for replacing a conventional fluorescent tube of a conventional fluorescent lighting fixture comprising:
- a tubular housing including at least one tube portion and a hollow center;
- at least one LED assembly including a plurality of LEDs on a mounting surface, each LED assembly mounted to a longitudinal length of the tubular housing with the mounting surface oriented such that an emitting direction of the plurality of LEDs is parallel to a tangent of the tubular housing, the tangent of the tubular housing being centered at a mounting location of the mounting surface respectively associated with each of the at least one LED assembly;
- and
- a light pipe associated with each LED assembly and having an opening extending radially from an inner surface of the tubular housing, the opening facing the emitting direction of the plurality of LEDs, and the light pipe curving inside the inner surface of the tubular housing and about at least a portion of the hollow center.
Dependencies are inferred from the claim text.