Illumination – Light fiber – rod – or pipe – Light emitting diode
Reexamination Certificate
2008-10-10
2010-11-23
Negron, Ismael (Department: 2885)
Illumination
Light fiber, rod, or pipe
Light emitting diode
C362S612000, C362S645000, C362S311020, C257S098000, C257S100000, C313S512000
Reexamination Certificate
active
07837370
ABSTRACT:
A low profile side-emitting lens for an LED die has two tiers of different waveguides radially extending out from a center side-emitting lens. An LED emits light into the center side-emitting lens, which has a curved surface that internally reflects the LED light outward approximately parallel to the top surface of the LED die. The center lens has a height of 2 mm, required for reflecting the LED light outward. Radially extending from the periphery of the bottom half of the center lens is a bottom tier of waveguides, each having a height of 1 mm, and radially extending from the periphery of the top half of the center lens is a top tier of waveguides, each having a height of 1 mm. The light output areas of the top and bottom tiers of waveguides are parallel with each other so that the 2 mm high side emission is reduced to a 1 mm side emission without reducing the emission area.
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International Search Report and Written Opinion. PCT/IB2009/054446 Filed Oct. 9, 2009.
Bierhuizen Serge
Eng Gregory
Koninklijke Philips Electronics , N.V.
Negron Ismael
Philips Lumileds Lighting Company LLC
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