Light emitting apparatus and light emitting method
AssigneesToyoda Gosei Co., Ltd., Independent Administrative Institution National Institute for Materials Science
InventorsNaoki Yoshimura, Yoshinobu Suehiro, Yuji Takahashi, Koichi Ota, Mamoru Mitomo, Tadashi Endo, Masakazu Komatsu
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Abstract
A light emitting apparatus has a light emitting element with an emission wavelength in the range of 360 to 550 nm and a rare-earth element doped oxide nitride phosphor or cerium ion doped lanthanum silicon nitride phosphor. Part of light radiated from the light emitting element is wavelength-converted by the phosphor. The light emitting apparatus radiates white light generated by a mixture of the wavelength-converted light and the other part of light radiated from the light emitting element.
Claims26
A light emitting apparatus, comprising:
- a light emitting element with an emission wavelength in the range of 360 to 550 nm;
- and
- a rare-earth element doped oxide nitride phosphor;
- wherein part of light radiated from the light emitting element is wavelength-converted by the phosphor.
A light emitting apparatus, comprising:
- a light emitting element with an emission wavelength in the range of 360 to 550 nm;
- and
- a cerium ion doped lanthanum silicon nitride phosphor;
- wherein part of light radiated from the light emitting element is wavelength-converted by the phosphor.
Alight emitting method for a light emitting apparatus that comprises a light emitting element with an emission wavelength in the range of 360 to 550 nm and a rare-earth element doped oxide nitride phosphor, wherein part of light radiated from the light emitting element is wavelength-converted by the phosphor, and the light emitting apparatus radiates light generated by a mixture of wavelength-converted light and the other part of light radiated from the light emitting element, comprising the step of:
- turning on intermittently the light emitting element.
Alight emitting method for a light emitting apparatus that comprises a light emitting element with an emission wavelength in the range of 360 to 550 nm and a cerium ion doped lanthanum silicon nitride phosphor, wherein part of light radiated from the light emitting element is wavelength-converted by the phosphor, and the light emitting apparatus radiates light generated by a mixture of wavelength-converted light and the other part of light radiated from the light emitting element, comprising the step of:
- turning on intermittently the light emitting element.
Dependencies are inferred from the claim text.