Display devices comprising green-emitting quantum dots and red KSF phosphor
AssigneeNanoco Technologies Ltd.
InventorsNigel L. Pickett, Nathalie C. Gresty, James Harris
Life of this patent
Estimating the term…
Abstract
LED devices emitting white light comprise a blue-emitting LED, green-emitting quantum dots (QDs) and red-emitting K2SiF6:Mn4+ (KSF) phosphor. A backlight unit (BLU) for a liquid crystal display (LCD) comprises one or more blue-emitting LEDs and a polymer film containing green-emitting QDs and KSF phosphor. The QDs and/or KSF phosphor may be encapsulated in beads that provide protection from oxygen and/or moisture.
Claims20
A light-emitting device comprising:
- a blue light emitting diode (LED);
- one or more particles of K2SiF6:Mn4+ (KSF) phosphor optically coupled to the blue LED;
- and
- a plurality of quantum dots optically coupled to the blue LED,
- wherein the one or more particles of KSF phosphor and the plurality of quantum dots are in a film remote from a package containing the blue LED.
A bead comprising an optically-transparent resin and a plurality of KSF phosphor particles embedded in the resin.
A bead comprising a central core portion surrounded by a shell portion comprising an optically-transparent resin and a plurality of KSF phosphor particles embedded in the shell portion resin.
A bead comprising:
- a central core portion comprising an optically-transparent resin having a plurality of KSF phosphor particles embedded therein;
- and
- a shell portion surrounding the central core portion and comprising a plurality of quantum dots.
A method for generating white light comprising:
- providing a blue light-emitting diode (LED);
- providing one or more particles of K2SiF6:Mn4+ (KSF) phosphor optically coupled to the blue light-emitting diode (LED);
- and
- providing a plurality of green-emitting quantum dots optically coupled to the blue light-emitting diode (LED),
- wherein the one or more particles of KSF phosphor and the plurality of green-emitting quantum dots are remote from a package containing the LED.
A backlight unit for a liquid crystal display comprising:
- a blue light-emitting diode (LED);
- a polymer film optically coupled to the blue light-emitting diode (LED) and containing one or more particles of K2SiF6:Mn4+ (KSF) phosphor and a plurality of quantum dots,
- wherein the polymer film is remote from a package containing the LED.
Dependencies are inferred from the claim text.