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US 5,959,316 AGranted
Multiple encapsulation of phosphor-LED devices
AssigneeHewlett-Packard Company
InventorChristopher Haydn Lowery
Life of this patent
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Abstract
A semiconductor device has a light-emitting diode covered by a transparent spacer which separates the LED from a uniformly thick fluorescent material containing layer such that there is a more uniform lighting of the fluorescent material containing layer to provide a uniform white light.
Claims20
A semiconductor device comprising:
- a light-emitting semiconductor;
- a transparent encapsulant disposed around said light-emitting semiconductor;
- a fluorescent material containing layer disposed over said light-emitting semiconductor and said transparent encapsulant;
- and
- input terminals connected to said light-emitting semiconductor for energizing said light-emitting semiconductor to emit light.
2 more elements
A semiconductor device comprising:
- a light-emitting diode;
- a transparent encapsulating resin disposed around said light-emitting diode;
- a resin containing fluorescent material disposed over said light-emitting diode and said transparent encapsulating resin;
- and
- input terminals connected to said light-emitting diode to energize said light-emitting diode to emit light.
2 more elements
A semiconductor device comprising:
- a sapphire substrate;
- an indium-doped gallium nitride epitaxial layer disposed upon said sapphire substrate to form a light-emitting diode;
- a transparent encapsulating resin disposed around said sapphire substrate;
- a YAG/Gd:Ce phosphor containing resin disposed over said epitaxial layer and said transparent encapsulating resin;
- and
- input terminals connected to said epitaxial layer for energizing said epitaxial layer to emit light.
3 more elements
Dependencies are inferred from the claim text.