Light-emitting device and method for manufacturing light-emitting device
AssigneeSharp Kabushiki Kaisha
InventorsToshio Hata, Nobuaki Aoki
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Abstract
A light-emitting device has a structure in which a light-emitting element is placed on a wiring pattern, with the wiring pattern and an upper portion of the light-emitting element being connected with each other by a bonding wire, and has a feature in that a phosphor kneaded matter, obtained from a phosphor kneaded matter packaging container, is sealed on the wiring pattern and the light-emitting element by a sealing resin. With this structure, it becomes possible to emit white light with high efficiency and consequently to obtain white light that is remarkably superior in color reproducibility (NTSC ratio).
Claims13
A light-emitting device comprising:
- a light-emitting element placed on a wiring pattern, with said wiring pattern and an upper portion of said light-emitting element being connected to each other by a bonding wire;
- and
- a phosphor kneaded matter obtained from a phosphor kneaded matter packaging container, the phosphor kneaded matter comprising a transparent resin, a red phosphor, and a calcium compound,
- wherein said phosphor kneaded matter is sealed on said wiring pattern and said light-emitting element by a sealing resin,
- wherein said red phosphor is a tetravalent manganese-activated tetravalent fluoride metal salt phosphor,
- wherein said calcium compound is calcium gluconate, calcium borogluconate, calcium glycerophosphate, calcium lactate, calcium propionate, calcium pantothenate, calcium citrate or calcium hydrogenphosphate, and
- said calcium compound is 30 to 50% in weight ratio relative to the transparent resin.
Dependencies are inferred from the claim text.