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US 10,648,911 B2Granted
Light emitting device
AssigneeNichia Corporation
InventorToshiaki Yamashita
Life of this patent
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Abstract
A light emitting device includes a fluorescent material, a first laser element and a second laser element. The first laser element is configured to emit a first laser light to excite the fluorescent material. The first laser light having a first peak wavelength that is shorter than an excitation peak wavelength of the fluorescent material. The second laser element is configured to emit a second laser light to excite the fluorescent material. The second laser light has a second peak wavelength that is longer than the excitation peak wavelength of the fluorescent material.
Claims19
A light emitting device comprising:
- one or more types of fluorescent materials including a first fluorescent material;
- a first laser element configured to emit a first laser light to excite the first fluorescent material, the first laser light having a first peak wavelength that is shorter than an excitation peak wavelength of the first fluorescent material;
- and
- a second laser element configured to emit a second laser light to excite the first fluorescent material, the second laser light having a second peak wavelength that is longer than the excitation peak wavelength of the first fluorescent material, wherein
- a difference between the first peak wavelength of the first laser light and the second peak wavelength of the second laser light is 40 nm or less.
2 more elements
Dependencies are inferred from the claim text.