Light-emitting diode with light redirecting structure
AssigneeFacebook Technologies, LLC
InventorsErik Shipton, Tanya Malhotra
Life of this patent
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Abstract
A light-emitting disclosure (LED) and an LED array are disclosed. The LED includes a semiconductor junction for emitting light and an optical surface coupled to the semiconductor junction for outputting at least a portion of the light. The optical surface can include a grating structure configured to increase the portion of the light outputted by the optical surface, and/or a redirecting structure configured to redirect the portion of the light to form an output optical beam.
Claims20
A light-emitting diode (LED) comprising:
- a semiconductor junction for emitting light upon application of electric current, the semiconductor junction comprising positive (p) and negative (n) regions;
- and
- an optical surface coupled to the semiconductor junction and supported by one of the p- or n-regions for outputting at least a portion of the light emitted by the semiconductor junction, the optical surface comprising a redirecting structure configured to redirect a chief ray of the portion of the light outputted by the optical surface from an initial direction to a pre-determined different direction.
A light-emitting diode (LED) array comprising:
- a substrate;
- an array of semiconductor junctions supported by the substrate and configured to emit light upon application of electric current;
- and
- an optical surface coupled to at least one of the array of semiconductor junctions for outputting at least a portion of the light emitted thereby, the optical surface comprising a redirecting structure configured to redirect a chief ray of the portion of the light outputted by the optical surface from am initial direction to a pre-determined different direction;
- wherein the semiconductor junctions each comprise positive (p) and negative (n) regions, wherein the optical surface is supported by one of the p- or n-regions of a corresponding semiconductor junction.
A method of manufacturing a light-emitting diode (LED), the method comprising:
- providing a semiconductor junction for emitting light, the semiconductor junction comprising positive (p) and negative (n) regions;
- providing an optical surface supported by one of the p- or n-regions for outputting at least a portion of the light, wherein the optical surface is coupled to the semiconductor junction;
- and
- forming, in the optical surface or on the optical surface, a redirecting structure configured to redirect a chief ray of the portion of the light outputted by the optical surface from an initial direction to a pre-determined different direction.
Dependencies are inferred from the claim text.