Non-radiatively pumped wavelength converter
First Claim
1. A light source, comprising:
- a light emitting diode (LED) structure, comprising an active layer disposed between a first doped semiconductor layer and a second doped semiconductor layer, the active layer having energy levels associated with light of a first wavelength;
a grid electrode on the first doped semiconductor layer, the grid electrode defining open regions of a surface of the first doped layer; and
a first plurality of light emitting elements positioned on the surface of the first doped semiconductor layer in the open regions, at least some of the light emitting elements being excited by non-radiative energy transfer from the active layer, the light emitting elements being capable of emitting light at a second wavelength different from the first wavelength; and
a second plurality of light emitting elements disposed over at least some of the first plurality of light emitting elements, at least some of the second plurality of light emitting elements being excited by non-radiative energy transfer from at least some of the first plurality of light emitting elements.
1 Assignment
0 Petitions
Accused Products
Abstract
A light source has an active layer (204) disposed between a first doped semiconductor layer (206) and a second doped semiconductor layer (208). The active layer has energy levels associated with light of a first wavelength. Light emitting elements (216) are positioned on the surface of the first doped semiconductor layer (206) for non-radiative excitation by the active layer. The light emitting elements are capable of emitting light at a second wavelength different from the first wavelength. In some embodiments a grid electrode (213) is disposed on the first doped semiconductor layer and defines open regions (214) of a surface of the first doped layer, the first plurality of light emitting elements being positioned in the open regions. In some embodiments a second plurality of light emitting elements is disposed over the first plurality of light emitting elements for non-radiative excitation by at least some of the first plurality of light emitting elements.
-
Citations
15 Claims
-
1. A light source, comprising:
-
a light emitting diode (LED) structure, comprising an active layer disposed between a first doped semiconductor layer and a second doped semiconductor layer, the active layer having energy levels associated with light of a first wavelength; a grid electrode on the first doped semiconductor layer, the grid electrode defining open regions of a surface of the first doped layer; and a first plurality of light emitting elements positioned on the surface of the first doped semiconductor layer in the open regions, at least some of the light emitting elements being excited by non-radiative energy transfer from the active layer, the light emitting elements being capable of emitting light at a second wavelength different from the first wavelength; and a second plurality of light emitting elements disposed over at least some of the first plurality of light emitting elements, at least some of the second plurality of light emitting elements being excited by non-radiative energy transfer from at least some of the first plurality of light emitting elements.
-
-
2. A light source, comprising:
-
a light emitting diode (LED) structure, comprising an active layer disposed between a first doped semiconductor layer and a second doped semiconductor layer, the active region having energy levels associated with light of a first wavelength; a first plurality of light emitting elements positioned on at least part of a surface of the first doped semiconductor layer, at least some of the light emitting elements being excited by non-radiative energy transfer from the active layer, the light emitting elements being capable of emitting light at a second wavelength different from the first wavelength; and a second plurality of light emitting elements disposed over at least some of the first plurality of light emitting elements, at least some of the second plurality of light emitting elements being excited by non-radiative energy transfer from at least some of the first plurality of light emitting elements, the second plurality of light emitting elements being capable of emitting light at a third wavelength different from the second wavelength. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
-
Specification