Light-emitting device, electronic device, and method for using light-emitting device
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsMitsuru NITTA, Shozo OSHIO, Takeshi ABE
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Abstract
A light-emitting device includes: a light source that radiates primary light; and a first phosphor that absorbs the primary light and converts the primary light into first wavelength-converted light having a longer wavelength than the primary light, wherein the primary light is laser light, the first wavelength-converted light includes fluorescence based on electron energy transition of Cr3+, and a fluorescence spectrum of the first wavelength-converted light has a maximum fluorescence intensity value in region of a wavelength exceeding 710 nm.
Claims18
A light-emitting device comprising:
- a light source that radiates primary light;
- and
- a first phosphor that absorbs the primary light and converts the primary light into first wavelength-converted light having a longer wavelength than the primary light, wherein
- the primary light is laser light,
- the first wavelength-converted light includes fluorescence based on electron energy transition of Cr3+, and
- a fluorescence spectrum of the first wavelength-converted light has a maximum fluorescence intensity value in region of a wavelength exceeding 710 nm.
A light-emitting device comprising:
- a light source that radiates primary light;
- and
- a first phosphor that absorbs the primary light and converts the primary light into first wavelength-converted light having a longer wavelength than the primary light, wherein
- the primary light is laser light,
- the first wavelength-converted light includes fluorescence based on electron energy transition of Cr3+, and
- an 80% spectrum width in a maximum fluorescence intensity value peak of the first wavelength-converted light is 20 nm or more and less than 80 nm.
A light-emitting device comprising:
- a light source that radiates primary light;
- and
- a first phosphor that absorbs the primary light and converts the primary light into first wavelength-converted light having a longer wavelength than the primary light, wherein
- the primary light is laser light,
- the first wavelength-converted light includes fluorescence based on electron energy transition of Cr3+, and
- a ratio of a fluorescence intensity of a fluorescence spectrum of the first wavelength-converted light at a wavelength of 780 nm with respect to a maximum fluorescence intensity value of the first wavelength-converted light exceeds 30%.
A light-emitting device comprising:
- a light source that radiates primary light;
- and
- a first phosphor that absorbs the primary light and converts the primary light into first wavelength-converted light having a longer wavelength than the primary light, wherein
- the primary light is laser light,
- the first wavelength-converted light includes fluorescence based on electron energy transition of Cr3+, and
- a 1/10 afterglow of the first wavelength-converted light is less than 1 ms.
Dependencies are inferred from the claim text.