US 11,264,543 B2 · Light conversion film comprising a quantum dot layer, backlight units for display devices including the light conversion film, and method of manufacturing a quantum dot dispersion

Abstract

A light conversion film is disclosed. The light conversion film includes a first transparent support layer and a second transparent support layer are formed on upper and lower surfaces of a quantum dot layer, respectively. The quantum dot layer contains 0.4 to 2.0% by weight of quantum dot particles containing 5% by weight or more and less than 35% by weight of cadmium; 0.05 to 0.75% by weight of cadmium-free quantum dot particles; 0.1 to 10% by weight of scattering agent; and 75 to 98% by weight of matrix material, based on the total weight of the quantum dot layer. A backlight unit for a display device including the light conversion film is disclosed.

Claims19

Dependent claims

Alight conversion film comprising a first transparent support layer formed on the upper surface of a quantum dot layer and a second transparent support layer formed on the lower surface thereof and having a thickness of 120 to 400 μm,

wherein the quantum dot layer comprises 0.4 to 2.0% by weight of quantum dot particles containing 5% by weight or more and less than 35% by weight of cadmium;
0.05 to 0.75% by weight of cadmium-free quantum dot particles;
0.1 to 10% by weight of scattering agent;
and 75 to 98% by weight of matrix material, based on the total weight of the quantum dot layer, and
wherein the cadmium content in the film is 10 to 100 ppm.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

16/922,467Filed 7 Jul 2020

Priority

KR 10-2019-00828229 Jul 2019

Published

US 2021/0013382 A114 Jan 2021

Granted

1 Mar 2022

Term ends

Not estimatedThe source records don’t support an estimate.

Classification13 codes

H10H 20/8513
Wavelength conversion materials: having two or more wavelength conversion materials
C09K 11/02
Luminescent materials, e.g. electroluminescent or chemiluminescent: use of particular materials as binders, particle coatings or suspension media…
C09K 11/883
Chalcogenides: with zinc or cadmium
G02F 1/133603
Direct backlight: with LEDs

Light conversion film comprising a quantum dot layer, backlight units for display devices including the light conversion film, and method of manufacturing a quantum dot dispersion

Life of this patent

Light conversion film comprising a quantum dot layer, backlight units for display devices including the light conversion film, and method of manufacturing a quantum dot dispersion

Life of this patent

Abstract

Claims19