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US 12,218,112 B2Granted
Method of forming light-emitting diodes with light coupling and conversion layers
AssigneeKateeva, Inc.
InventorFlorian Pschenitzka
Life of this patent
Estimating the term…
Abstract
Light-emitting sub-pixels and pixels for micro-light-emitting diode-based displays are provided. Also provided are methods of fabricating individual sub-pixels, pixels, and arrays of the pixels. The sub-pixels include a double-layered film that includes a coupling layer disposed over a light-emitting diode and a light-emission layer disposed over the coupling layer.
Claims20
A method, comprising:
- forming a first confinement feature over a first light-emitting diode of a substrate;
- forming a first scattering layer comprising scattering particles over the first light-emitting diode;
- forming a red light-emission layer comprising red-emitting particles and scattering particles over the first scattering layer;
- forming a second confinement feature over a second light-emitting diode of the substrate;
- forming a second scattering layer comprising scattering particles over the second light-emitting diode;
- and
- forming a green light-emission layer comprising green-emitting particles and scattering particles over the second scattering layer.
4 more elements
A method of forming a display, the method comprising:
- forming a plurality of pixels on a semiconductor substrate each pixel comprising a red sub-pixel, a green sub-pixel, and a blue sub-pixel, and each pixel formed by:
- forming a first light-emitting diode, a second light-emitting diode, and a third light-emitting diode on the semiconductor substrate;
- forming a first confinement feature over the first light-emitting diode;
- forming a second confinement feature over the second light-emitting diode;
- forming a red light emission-layer comprising red-emitting particles and scattering particles over the first light-emitting diode to provide the red sub-pixel;
- forming a green light emission layer comprising green-emitting particles and scattering particles over the second light-emitting to provide the green sub-pixel;
- and
- forming a blue light emission layer comprising blue light-emitting particles and scattering particles over the third light-emitting to provide the blue sub-pixel.
5 more elements
A method, comprising:
- forming a first confinement feature over a first light-emitting diode of a substrate;
- forming a first scattering layer comprising scattering particles over the first light-emitting diode;
- forming a red light-emission layer comprising red-emitting quantum dots and scattering particles over the first scattering layer, the red-emitting quantum dots having a graded concentration in at least a portion of the red light-emission layer;
- forming a second confinement feature over a second light-emitting diode of the substrate;
- forming a second scattering layer comprising scattering particles over the second light-emitting diode;
- and
- forming a green light-emission layer comprising green-emitting quantum dots and scattering particles over the second scattering layer, the green-emitting quantum dots having a graded concentration in at least a portion of the green light-emission layer.
4 more elements
Dependencies are inferred from the claim text.