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US 7,407,303 B2Granted
Lighting device comprising a plurality of semiconductor light sources
AssigneeOSRAM Opto Semiconductors GmbH
InventorsMario Wanninger, Markus Hofmann, Günter Waitl, Alexander Wilm
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Abstract
A lighting device is disclosed comprising a plurality of semiconductor light sources disposed on a carrier, wherein the light from the light sources is coupled into assigned lightguides at a set angle to the surface normals of the carrier and the lightguides are provided with reflecting and light exit faces such that the envelope of the light outcoupling faces forms a curved surface segment.
Claims22
A lighting device comprising:
- a plurality of semiconductor light sources disposed on a carrier,
- wherein the light from the light sources is coupled into assigned lightguides at a set angle to a surface normal of the carrier,
- said lightguides are provided with light entrance faces, reflecting faces, and light exit faces such that the light exit faces collectively define a curved surface,
- said light exit faces are substantially larger than the light entrance faces,
- said light exit faces of the lightguides and the respective reflecting faces of the lightguides form an angle which is smaller than 25°, and
- said light reflecting faces are structured such that the light is homogenously coupled out over the light exit faces.
3 more elements
A lighting device comprising:
- a plurality of semiconductor light sources disposed on a carrier,
- wherein the light from the light sources is coupled into assigned lightguides at a set angle to a surface normal of the carrier,
- said lightguides are provided with light entrance faces, reflecting faces, and light exit faces,
- said light exit faces are substantially larger than the light entrance faces,
- said light exit faces of the lightguides and the respective reflecting faces of the lightguides form an angle which is smaller than 25°;
- and
- said light reflecting faces are structured such that the light is homogenously coupled out over the light exit faces
- wherein the lightguides comprise at least a first lightguide and a second lightguide,
- a light exit face of the first lightguide and a light exit face of the second lightguide being located one above the other relative to the carrier.
6 more elements
Dependencies are inferred from the claim text.