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US 11,081,622 B2Granted
III-nitride multi-wavelength LED for visible light communication
AssigneeLumileds LLC
InventorsIsaac Harshman Wildeson, Parijat Pramil Deb, Robert Armitage
Life of this patent
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Abstract
A light emitting diode (LED) array may include a first pixel and a second pixel on a substrate. The first pixel and the second pixel may include one or more tunnel junctions on one or more LEDs. The LED array may include a first trench between the first pixel and the second pixel. The trench may extend to the substrate.
Claims20
A light emitting diode (LED) array comprising:
- a first pixel adjacent to a second pixel, the second pixel adjacent to a third pixel;
- the first pixel comprising a first stack and having a first pair of contacts, the first pair of contacts comprising at least one first contact on a first pixel semiconductor layer, the first pixel semiconductor layer on a first pixel tunnel junction, the first pixel tunnel junction on a first pixel LED on a substrate;
- the second pixel comprising a second stack and having a second pair of contacts, the second pair of contacts comprising at least one second contact on a second pixel semiconductor layer, the second pixel semiconductor layer on a second pixel second tunnel junction, the second pixel tunnel junction on a second pixel second LED, the second pixel second LED on a second pixel first tunnel junction, the second pixel first tunnel junction on a second pixel first LED on the substrate;
- the third pixel comprising a third stack and having a third pair of contacts, the third paid of contact comprising at least one third contact on a third pixel third LED, the third pixel third LED on a third pixel second tunnel junction, the third pixel second tunnel junction on a third pixel second LED, the third pixel second LED on a third pixel first tunnel junction, the third pixel first tunnel junction on a third pixel first LED on the substrate;
- a first trench separating the first pixel and the second pixel;
- a second trench separating the third pixel and the second pixel;
- and
- a dielectric layer formed over at least a portion of the first pixel, the second pixel, and the third pixel.
5 more elements
A method comprising:
- receiving transmission data;
- converting the transmission data into a plurality of driving modulation signals;
- providing a first voltage to first a pixel of a light emitting diode (LED) array, based on the plurality of driving modulation signals, the first pixel comprising a first stack and having a first pair of contacts, the first pair of contacts comprising at least one first contact on a first pixel semiconductor layer on a first pixel tunnel junction, the first pixel tunnel junction on a first pixel LED on the substrate;
- providing a second voltage to a second pixel of the LED array based on the plurality of driving modulation signals, the first pixel and the second pixel separated by a first trench extending to a substrate, the second pixel comprising a second stack having a second pair of contacts, the second pair of contacts comprising at least one second contact on a second pixel semiconductor layer on a second pixel second tunnel junction, the second pixel tunnel junction on a second pixel second LED, the second pixel second LED on a second pixel first tunnel junction, the second pixel first tunnel junction on a second pixel first LED on the substrate;
- and
- providing a third voltage to a third pixel of the LED array based on the plurality of driving modulation signals, the third pixel comprising a third stack having a third pair of contacts, the third pair of contact comprising at least one third contact on a third pixel third LED on a third pixel second tunnel junction, the third pixel second tunnel junction on a third pixel second LED, the third pixel second LED on a third pixel first tunnel junction, the third pixel first tunnel junction on a third pixel first LED on the substrate.
3 more elements
Dependencies are inferred from the claim text.