US 2023/0155075 A1 · LIGHT EMITTING DEVICES INCLUDING A QUANTUM DOT COLOR CONVERSION MATERIAL AND METHOD OF MAKING THEREOF

Abstract

A light emitting device includes a first optical cavity bounded by cavity walls, a first light emitting diode located in the first optical cavity and configured to emit blue or ultraviolet radiation first incident photons, a first color conversion material located over the first light emitting diode and configured to absorb the first incident photons emitted by the light emitting diode and to generate first converted photons having a longer peak wavelength than a peak wavelength of the first incident photons, and a first color selector located over the first color conversion material and configured to absorb or reflect the first incident photons and to transmit the first converted photons.

Claims20

Dependent claims

A light emitting device, comprising:

a first optical cavity bounded by at least one first cavity wall;
a first light emitting diode located in the first optical cavity and configured to emit blue or ultraviolet radiation first incident photons;
a first color conversion material located over the first light emitting diode and configured to absorb the first incident photons emitted by the first light emitting diode and to generate first converted photons having a longer peak wavelength than a peak wavelength of the first incident photons;
and
a first color selector located over the first color conversion material and configured to absorb or reflect the first incident photons and to transmit the first converted photons.

2 more elements

A method of forming an array of light emitting devices, comprising:

forming a first via in a matrix material;
depositing a first plurality of quantum dots in the first via to form a first portion of the color conversion material layer corresponding to a first color;
forming a second via in the matrix material;
depositing a second plurality of quantum dots in the second via to form a second portion of the color conversion material layer corresponding to a second color;
forming a third via in the matrix material;
and
depositing a third plurality of quantum dots in the third via to form a third portion of the color conversion material layer corresponding to a third color,
wherein the first plurality of quantum dots are located over a first light emitting diode, the second plurality of quantum dots are located over a second light emitting diode, and the third plurality of quantum dots are located over a third light emitting diode.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application

18/055,572Filed 15 Nov 2022

Priority

16 Nov 2021

Published

18 May 2023

Term ends

Not estimatedThe source records don’t support an estimate.

Classification12 codes

H10H 20/8512
Characterised by their material, e.g. binder: wavelength conversion materials
H10H 20/841
Coatings, e.g. passivation layers or antireflective coatings: reflective coatings, e.g. dielectric Bragg reflectors
H10H 20/8513
Wavelength conversion materials: having two or more wavelength conversion materials
H10H 20/8515
Wavelength conversion means: not being in contact with the bodies

Light emitting devices including a quantum dot color conversion material and method of making thereof

Life of this patent

Light emitting devices including a quantum dot color conversion material and method of making thereof

Life of this patent

Abstract

Claims20