Photon energy conversion structure
First Claim
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1. A light source comprising:
- a photon emission source in the wavelength range of ultraviolet to near ultraviolet (less than about 350 nm); and
a wavelength shifting medium which receives emitted photons and emits lower frequency energy in the wavelength range of about 400-700 nm, and in a substantially uniform, unfocussed, omni directional radiation pattern.
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Abstract
A photon energy conversion device uses at least one ultraviolet light emitting diode (UV-LED) with a wavelength shifting medium such as phosphor or quantum dots. The device can be used as a light source, and shaped like incandescent light bulbs, fluorescent tubes, circles or compact fluorescent bulbs.
155 Citations
30 Claims
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1. A light source comprising:
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a photon emission source in the wavelength range of ultraviolet to near ultraviolet (less than about 350 nm); and a wavelength shifting medium which receives emitted photons and emits lower frequency energy in the wavelength range of about 400-700 nm, and in a substantially uniform, unfocussed, omni directional radiation pattern. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A photon energy conversion device in the form of a first electrode layer being generally transmissive to photon energy, a second electrode layer, and a layer of photon energy conversion material in the form of quantum dots disposed between the first layer and second layer.
Specification