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US 9,068,715 B2Granted
Tube luminescent retrofit using light emitting diodes
AssigneeKoninklijke Philips N.V.
InventorsArjen Gerben Van Der Sijde, Tewe Hiepke Hiepke Heemstra, Nicola Bettina Bettina Pfeffer
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Abstract
The invention relates to a LED-based optical unit including a LED disposed on a surface and a monolithic module encompassing the LED and including a re-directing portion and a first diffusing portion. The first diffusing portion is configured to diffuse light incident thereon. The re-directing portion is configured to re-direct at least a first portion of light emitted by the LED to be incident on the first diffusing portion.
Claims14
An optical unit, comprising:
- a light emitting device disposed on a surface;
- and
- a monolithic module encompassing the light emitting device and comprising a re-directing portion and a first diffusing portion, wherein:
- the first diffusing portion is configured to diffuse light incident thereon, and
- the re-directing portion is configured to re-direct
- at least a first portion of light emitted by the light emitting device to be incident on the first diffusing portion,
- wherein the monolithic module includes an inner surface that forms a chamber in which at least part of the light emitting device is disposed and wherein at least a portion of the inner surface transitions from a concave structure to a convex structure.
4 more elements
Dependencies are inferred from the claim text.