Ceramic packaging for high brightness LED devices
First Claim
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1. A standalone light emitting diode package, comprising:
- a housing comprising substantially vertical sidewalls and a substrate, the sidewalls and the substrate defining a cavity having a bottom, the substrate being located at the bottom of the cavity, the substrate and the vertical sidewalls being contiguous, continuous and uninterrupted respecting one another at the intersections thereof, the housing forming a single unitary piece of ceramic;
at least one light-reflective metallic coating disposed over at least portions of the sidewalls and the substrate;
a light emitting diode mounted on or in the substrate, and an optically transparent material disposed in the cavity and covering the light emitting diode;
wherein the ceramic composition and configuration of the housing and the light-reflective coating cooperate to minimize light leakage through, into or out of the housing when the light emitting diode is energized, the metallic coating reflects light incident thereon in a predetermined direction, and the optically transparent material protects the light emitting diode.
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Abstract
Embodiments of the present invention include a light emitting diode package comprising a ceramic cavity comprising a substrate for mounting a light emitting diode and substantially vertical sidewalls for reducing light leakage. The ceramic LED package further includes a metallic coating on a portion of the ceramic substrate for reflecting light in a predetermined direction.
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Citations
13 Claims
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1. A standalone light emitting diode package, comprising:
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a housing comprising substantially vertical sidewalls and a substrate, the sidewalls and the substrate defining a cavity having a bottom, the substrate being located at the bottom of the cavity, the substrate and the vertical sidewalls being contiguous, continuous and uninterrupted respecting one another at the intersections thereof, the housing forming a single unitary piece of ceramic; at least one light-reflective metallic coating disposed over at least portions of the sidewalls and the substrate; a light emitting diode mounted on or in the substrate, and an optically transparent material disposed in the cavity and covering the light emitting diode; wherein the ceramic composition and configuration of the housing and the light-reflective coating cooperate to minimize light leakage through, into or out of the housing when the light emitting diode is energized, the metallic coating reflects light incident thereon in a predetermined direction, and the optically transparent material protects the light emitting diode. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of making a standalone light emitting diode package, the package comprising a housing having substantially vertical sidewalls and a substrate, the sidewalls and the substrate defining a cavity having a bottom, the substrate being located at the bottom of the cavity, the substrate and the vertical sidewalls being contiguous, continuous and uninterrupted respecting one another at the intersections thereof, the housing forming a single unitary piece of ceramic, at least one light-reflective metallic coating being disposed over at least portions of the sidewalls and the substrate, a light emitting diode being mounted on or in the substrate, an optically transparent material being disposed in the cavity and covering the tight emitting diode, the ceramic composition and configuration of the housing and the light-reflective coating cooperating to minimize light leakage through, into or out of the housing when the light emitting diode is energized, the metallic coating reflecting light incident thereon in a predetermined direction, and the optically transparent material protecting the light emitting diode, the method comprising:
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(a) stamping the housing from the unitary piece of ceramic; (b) coating the at least portions of the sidewalls and substrate with the at least one light-reflective metallic coating; (c) mounting the light emitting diode on or in the substrate, and (d) depositing the optically transparent material in the cavity. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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Specification