Light emitting diode lamp and light emitting device
First Claim
1. A bullet type light emitting diode lamp or a chip-type light emitting diode lamp to be mounted on a substrate, at least including a semiconductor light emitting element, and a plurality of fluorescent materials that absorb part or whole of light emitted from the semiconductor light emitting element, and emit fluorescence at a wavelength different from that of the absorbed light,wherein the plurality of fluorescent materials comprise a phosphor mainly composed of a CaAlSiN3 crystal phase.
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Abstract
The present invention aims at providing a white light emitting diode lamp (a bullet type light emitting diode lamp or a chip-type light emitting diode lamp to be mounted on a substrate) and light emitting device with warmness at a higher luminance, and an intermediate color light emitting diode lamp and light emitting device satisfying light emission in diversified color tones at a higher luminance.
The solving means resides in adoption of at least including a semiconductor light emitting element, and a plurality of fluorescent materials that absorb part or whole of light emitted from the semiconductor light emitting element, and emit fluorescence at a wavelength different from that of the absorbed light, wherein the plurality of fluorescent materials comprise a phosphor mainly composed of a CaAlSiN3 crystal phase.
Another solving means resides in adoption of a fluorescent material that absorbs part or whole of light emitted from the semiconductor light emitting element, and emits fluorescence at a wavelength different from that of the absorbed light, wherein the fluorescent material includes a nitride phosphor that is obtained by firing using an electric furnace of a resistance heating type.
39 Citations
9 Claims
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1. A bullet type light emitting diode lamp or a chip-type light emitting diode lamp to be mounted on a substrate, at least including a semiconductor light emitting element, and a plurality of fluorescent materials that absorb part or whole of light emitted from the semiconductor light emitting element, and emit fluorescence at a wavelength different from that of the absorbed light,
wherein the plurality of fluorescent materials comprise a phosphor mainly composed of a CaAlSiN3 crystal phase.
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4. A visible light emitting device, at least including a semiconductor light emitting element that emits bluish purple or blue light, a support member for placing the semiconductor light emitting element therein, a terminal for supplying electric power to the semiconductor light emitting element, and a fluorescent material that absorbs part or whole of light emitted from the semiconductor light emitting element, and emits fluorescence at a wavelength different from that of the absorbed light, wherein
the fluorescent material includes a nitride phosphor that is obtained by firing using an electric furnace of a resistance heating type.
Specification