LIGHT-EMITTING APPARATUS

A light-emitting apparatus includes: a first phosphor layer including a first phosphor composed of an inorganic phosphor activated by Ce3+; and a second phosphor layer including a second phosphor composed of an inorganic phosphor activated by Ce3+ and different from the first phosphor. The second ph...

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Bibliographische Detailangaben
Hauptverfasser:	OSHIO, Shozo, ABE, Takeshi
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES BASIC ELECTRIC ELEMENTS BLASTING CHEMISTRY DEVICES USING STIMULATED EMISSION DYES ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR ELECTRICITY FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMSTHEREOF HEATING LIGHTING MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE MECHANICAL ENGINEERING METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS POLISHES SEMICONDUCTOR DEVICES STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHERARTICLES, NOT OTHERWISE PROVIDED FOR WEAPONS
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Beschreibung
Zusammenfassung:	A light-emitting apparatus includes: a first phosphor layer including a first phosphor composed of an inorganic phosphor activated by Ce3+; and a second phosphor layer including a second phosphor composed of an inorganic phosphor activated by Ce3+ and different from the first phosphor. The second phosphor layer is provided so as to be spaced apart from the first phosphor layer. The light-emitting apparatus further includes: an optical filter provided between the first phosphor layer and the second phosphor layer; and an excitation source that emits light that excites at least one of the first phosphor and the second phosphor. The second phosphor has light absorption characteristics of absorbing at least a part of first fluorescence emitted by the first phosphor. The optical filter reflects at least a part of the first fluorescence emitted by the first phosphor, and allows passage of second fluorescence emitted by the second phosphor.