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US 8,410,681 B2Granted
Light emitting device having a refractory phosphor layer
AssigneeBridgelux, Inc.
InventorsAlex Shaikevitch, Chris Lowery
Life of this patent
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Abstract
A light emitting device and method of producing the same is disclosed. The light emitting device includes a transparent thermal conductor layer, a refractory phosphor layer provided on the transparent thermal conductor layer, and a light emitting semiconductor arranged to emit light toward the transparent thermal conductor layer and the refractory phosphor layer.
Claims15
An apparatus, comprising:
- a transparent thermal conductor layer, wherein the transparent thermal conductor layer is coupled to a thermally conductive enclosure comprising a recessed housing comprising a cavity and a metal housing, wherein the cavity is sealed;
- a reflective layer displaced on an inner surface of the cavity;
- a refractory phosphor layer provided on the transparent thermal conductor layer, wherein the refractory phosphor layer is fused to the transparent thermal conductor layer and the cavity is sealed by the transparent thermal conductive layer provided with the refractory phosphor layer being crimped between the recessed housing and a portion of the metal housing;
- and
- a light emitting semiconductor arranged to emit light toward the transparent thermal conductor layer and the refractory phosphor layer, wherein light that is not emitted towards the refractory phosphor layer is reflected by the reflective layer.
2 more elements
A light emitting device, comprising:
- a refractory phosphor layer fused onto a transparent layer comprising a thermal conductivity greater than that of the refractory phosphor layer, wherein the transparent layer is coupled to a thermally conductive enclosure comprising a recessed housing comprising a cavity and a metal housing, wherein the cavity is sealed by the transparent thermal conductive layer provided with the refractory phosphor layer being crimped between the recessed housing and a portion of the metal housing;
- and
- a reflective layer displaced on an inner surface of the cavity, wherein the reflective layer is configured to reflect light towards the transparent layer.
A method for manufacturing a light emitting device, comprising:
- depositing at least one phosphor mixture onto a transparent substrate, wherein the phosphor mixture comprises a phosphor powder, a glass frit, and a binder;
- fusing the phosphor mixture to the transparent substrate;
- thermally coupling the transparent substrate to a thermally conductive enclosure comprising a recessed housing comprising a cavity and a metal housing, wherein the cavity is sealed by the transparent thermal conductive layer provided with the refractory phosphor layer being crimped between the recessed housing and a portion of the metal housing;
- and
- depositing a reflective layer on an inner surface of the cavity, wherein the reflective layer is configured to reflect light towards the transparent substrate.
2 more elements
Dependencies are inferred from the claim text.