Light-emitting diode with light-conversion layer
AssigneeLedEngin, Inc.
InventorYi Dong
Life of this patent
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Abstract
A method for making a lighting apparatus includes providing a substrate and disposing a light-emitting diode overlying the substrate. The light-emitting diode has a top surface oriented away from the substrate and a plurality of side surfaces. A light-conversion material is provided that includes a substantially transparent base material and a wave-shifting material dispersed in the base material. The concentration of the wave-shifting material can be at least 30%. In an embodiment, the concentration of the wave-shifting material can be approximately 50% or 70%. A predetermined amount of the light-conversion material is deposited on the top surface of the light-emitting diode while the side surfaces are maintained substantially free of the light-conversion material.
Claims5
A method for making a lighting apparatus, the method comprising:
- providing a substrate;
- disposing at least a first light-emitting diode and a second light-emitting diode overlying the substrate, each of the first and the second light-emitting diodes having a top surface oriented away from the substrate and a plurality of side surfaces;
- providing a first phosphor-containing material having a phosphor concentration of at least 30%
- providing a second phosphor-containing material having a phosphor concentration of at least 30%;
- depositing a first predetermined amount of the first phosphor-containing material on the top surface of the first light-emitting diode while maintaining the side surfaces substantially free of the phosphor-containing material;
- and
- depositing a second predetermined amount of the second phosphor-containing material on the top surface of the second light-emitting diode while maintaining the side surfaces substantially free of the phosphor-containing material, wherein the second predetermined amount is different from the first predetermined amount.
Dependencies are inferred from the claim text.