US 7,842,333 B2 · Method of forming phosphor film and method of manufacturing light emitting diode package incorporating the same

Abstract

The invention relates to a method of forming a phosphor film and a method of manufacturing an LED package incorporating the same. The method of forming a phosphor film includes mixing phosphor and light-transmitting beads in an aqueous solvent such that the nano-sized light-transmitting beads having a first charge are adsorbed onto surfaces of phosphor particles having a second charge. The method also includes coating a phosphor mixture obtained from the mixing step on an area where the phosphor film is to be formed, and drying the coated phosphor mixture to form the phosphor film. The invention further provides a method of manufacturing an LED package incorporating the method of forming the phosphor film.

Claims17

Dependent claims

A method of forming a phosphor film comprising steps of:

mixing phosphor and nano-sized light-transmitting beads in an aqueous solvent such that the nano-sized light-transmitting beads having a first charge are adsorbed onto surfaces of phosphor particles having a second charge;
coating a phosphor mixture obtained from the mixing step on an area where the phosphor film is to be formed;
and
drying the coated phosphor mixture to form the phosphor film,
wherein the phosphor particles have a positive polarity, and each of the light-transmitting nano-beads has a functional group having a negative polarity on a surface thereof, selected from the group consisting of sulfonates, phosphates and carboxylates.

2 more elements

Dependencies are inferred from the claim text.

Method of forming phosphor film and method of manufacturing light emitting diode package incorporating the same

Life of this patent

Method of forming phosphor film and method of manufacturing light emitting diode package incorporating the same

Life of this patent

Abstract

Claims17