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US 8,750,671 B1Granted
Light bulb with omnidirectional output
AssigneeFusion Optix, Inc.
InventorsTimothy Kelly, Terence Yeo, David Morin, Matthew Sherman
Life of this patent
Estimating the term…
Abstract
An outcoupling optic and omnidirectional lamp are provided which enable an omnidirectional light distribution from a lamp with directional light sources such as light emitting diodes. Specific embodiments include the A-type lamp, A19.
Claims15
A light emitting device comprising:
- a) a light source;
- and
- b) an outcoupling optic comprising;
- i. a bulb shaped non-planar light guide of optically transmissive material having a refractive index greater than 1 and a first input edge disposed to receive light from a light source and propagate light through total internal reflection within the walls of the light guide;
- ii. a light extracting region comprising a plurality of light extracting features;
- c) a reflecting component positioned within the interior of the non-planar light guide;
- wherein light is output with an omnidirectional luminous intensity distribution.
4 more elements
A light emitting device comprising:
- a) a light source;
- and
- b) an outcoupling optic comprising
- i. a non-planar light guide of optically transmissive material having a refractive index greater than 1 and a first input edge disposed to receive light from a light source and propagate light through total internal reflection within the walls of the light guide;
- ii. a light extracting region comprising matrix and domain regions with differing indices of refraction such that Δ|np−nm|>0.001 where nP is the index of refraction of the domain and nm is the index of refraction of the matrix;
- c) a reflecting component positioned within the interior of the non-planar light guide;
- wherein light is output with an omnidirectional luminous intensity distribution.
4 more elements
An outcoupling optic with an omnidirectional shape comprising;
- a) A bulb shaped non-planar light guide of optically transmissive material having a refractive index η1 greater than 1 and a first input edge disposed to receive light from a light source and propagate light through total internal reflection within the walls of the light guide;
- b) a light extracting region comprising a plurality of light extracting features.
Dependencies are inferred from the claim text.