Lighting apparatus and method for manufacturing same
AssigneeLG Electronics Inc.
InventorsBokyung Kang, Gunyoung Hong, Younggil Yoo, Minsung Kim, Kyungpil Kim
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Abstract
Alighting apparatus can include a light emitting element that can irradiate light, and an optical conversion layer disposed on the light emitting element for converting the irradiated light. The optical conversion layer can include crystal grains of a first phosphor and crystal grains of a second phosphor, and the crystal grains of the first phosphor and the crystal grains of the second phosphor can be in mixed form in the optical conversion layer.
Claims15
A lighting apparatus comprising:
- a light emitting element configured to irradiate light;
- and
- an optical conversion layer disposed on the light emitting element and configured to convert the irradiated light,
- wherein the optical conversion layer includes crystal grains of a first phosphor and crystal grains of a second phosphor,
- wherein the crystal grains of the first phosphor and the crystal grains of the second phosphor are in mixed form in the optical conversion layer,
- wherein the first phosphor is SrSi2O2N2 and the second phosphor is Sr2Si5N8, and
- wherein a weight % of the first phosphor compared to the optical conversion layer is less than a weight % of the second phosphor compared to the optical conversion layer.
A method for manufacturing a lighting apparatus, the method comprising:
- ball-milling a first phosphor and a second phosphor;
- forming a plate by arranging a powder of the first phosphor and a powder of the second phosphor in a mold;
- and
- forming an optical conversion layer by performing heat treatment on the plate,
- wherein the first phosphor is SrSi2O2N2 and the second phosphor is Sr2Si5N8, and
- wherein a weight % of the first phosphor compared to the optical conversion layer is less than a weight % of the second phosphor compared to the optical conversion layer.
A lighting apparatus comprising:
- a light emitting element configured to irradiate light;
- and
- an optical conversion layer on the light emitting element and configured to convert the irradiated light of one wavelength to another wavelength,
- wherein the optical conversion layer includes crystal grains of a first phosphor and crystal grains of a second phosphor that are dispersed and coplanar in the optical conversion layer,
- wherein the first phosphor is SrSi2O2N2 and the second phosphor is Sr2Si5N8, and
- wherein a weight % of the first phosphor compared to the optical conversion layer is less than a weight % of the second phosphor compared to the optical conversion layer.
Dependencies are inferred from the claim text.