Lighting sub-assembly with dual mode optical element
AssigneeFusion Optix, Inc.
InventorsTerence Yeo, Lee Mantha, Michael Demas, Timothy Kelly
Life of this patent
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Abstract
A lighting subassembly and components are provided which increase light output and uniformity of brightness and color by use of an optical element that functions simultaneously as an outcoupling TIR light guide and a direct throughput lens. It provides typical benefits of an edgelit light guide design including shallow depth, extended emitting area, and off axis light distributions such as batwing distributions particularly useful in downlighting and other lighting applications. Additionally, area dedicated to bezels or edge reflectors can be greatly reduced or eliminated due to decreased hotspotting to provide a fixture face with very high percentage of light emitting area.
Claims23
A lighting sub-assembly comprising;
- an optical element having an input face and an output face arranged with an input face/output face alignment angle of less than 90 degrees within a x-y cross-sectional plane aligned with the optical output axis of a light source aligned perpendicular to the z axis of the optical element which emits light into the input face of the optical element;
- wherein a portion of light is directly transmitted from the input face through the output face and a portion of light is propagated within the optical element by total internal reflection at the output face.
A lighting sub-assembly comprising;
- a) an optical element having an input face perpendicular to a x-y profile cross-section, an output face perpendicular to a x-y profile cross-section, and an optical element overhang which extends beyond the input face;
- b) a light source aligned perpendicular to the z axis of the optical element which emits light into the input face of the light guide;
- wherein a portion of light is directly transmitted from the input face through the output face and a portion of light is propagated within the optical element by total internal reflection at output face.
Dependencies are inferred from the claim text.