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US 6,744,960 B2Granted
Lighting apparatus having quantum dot layer
AssigneeTeledyne Lighting and Display Products, Inc.
InventorDavid G. Pelka
Life of this patent
Estimating the term…
Abstract
A fluorescent structure comprising a plurality of quantum dots that radiate emission in response to optical pumping. These quantum dots are disposed in relation to a waveguide so as to be able to propagate this emission through the waveguide. Preferably, the fluorescent structure comprises a layer of quantum dots sandwiched between two layers, at least one layer being optically transmissive to the pump radiate and at least one of the layers being optically transmissive to emission from the quantum dots.
Claims76
An apparatus comprising:
- a layer of quantum dots, said quantum dots emitting light in response to exposure to pump radiation;
- a waveguide which receives and guides light emitted by the layer of quantum dots;
- and
- an upper layer which together with said waveguide sandwich said layer of quantum dots therebetween;
- wherein said waveguide, said layer of quantum dots, and said upper layer together have a thickness of less than about 500 micrometers (mm).
2 more elements
An apparatus comprising:
- a layer of quantum dots, said quantum dots emitting light in response to exposure to pump radiation;
- a waveguide which receives and guides light emitted by the layer of quantum dots;
- and
- an optical element having surfaces configured to reduce angular spread of light exiting said waveguide.
1 more element
An apparatus comprising:
- a layer of quantum dots, said quantum dots emitting light in response to exposure to pump radiation;
- a waveguide which receives and guides light emitted by the layer of quantum dots;
- and
- a specularly reflective layer adjacent at least one side of said waveguide.
1 more element
An apparatus comprising:
- a layer of quantum dots, said quantum dots emmitting light in response to exposure to pump radiation;
- a wavelength which receives and guides light emitted by the layer of quantum dots;and
- an optical transducer having an electrical output, said transducer being positioned to received light exiting said waveguide;
- wherein said optical transducer comprises a photovoltaic solar cell.
1 more element
Dependencies are inferred from the claim text.