Fluorescent member, and illumination device and display device including the same
AssigneeSharp Kabushiki Kaisha
InventorTatsuya Morioka
Life of this patent
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Abstract
A fluorescent member includes a plurality of particles dispersed in a medium. Each particle includes a core and a coating layer covering the core. The core is formed of a semiconductor which absorbs excitation light and emits light of a wavelength different from that of the excitation light. Each particle is made to have a particle size for causing Mie scattering with respect to the excitation light. Thus, a fluorescent member excellent in light conversion efficiency can be obtained.
Claims40
A fluorescent member comprising a plurality of particles dispersed in a medium, wherein
- each of said particle includes at least one core and a coating layer covering the at least one core,
- said at least one core has a diameter of between 5 nm and 100 nm and is formed of a semiconductor for absorbing excitation light and emitting light having a wavelength different from a wavelength of the excitation light, said at least one core formed of a semiconductor selected from InxGayAl1−x−yN (0≦x≦1, 0≦y≦1, x+y≦1), and ZnxMgyCd1−x−ySevS1−v(0≦x≦1, 0≦y≦1, x+y≦1, 0≦v≦1);
- and
- said particle has a particle size for causing Mie scattering with respect to said excitation light, wherein each of said particles includes a plurality of cores for emitting light of the same wavelength and said coating layer covering the cores.
A fluorescent member comprising a plurality of particles dispersed in a medium, wherein
- each of said particles includes at least one core and a coating layer covering the at least one core,
- said at least one core has a diameter of between 5 nm and 100 nm and is formed of a semiconductor for absorbing excitation light and emitting light having a wavelength different from a wavelength of the excitation light, said at least one core formed of a semiconductor selected from InxGayAl1−x−yN (0≦x≦1, 0≦y≦1, x+y≦1), and ZnxMgyCd1−x−ySevS1−v(0≦x≦1, 0≦y≦1, x+y≦1, 0≦v≦1);
- and
- said particle has a particle size for causing Mie scattering with respect to said excitation light, wherein each of said particles includes a plurality of cores for emitting lights of different wavelengths and said coating layer covering the cores.
A fluorescent member comprising a plurality of particles dispersed in a medium, wherein
- each of said particles includes at least one core and a coating layer covering the at least one core,
- said at least one core has a diameter of between 5 nm and 16 nm and is formed of a semiconductor for absorbing excitation light and emitting light having a wavelength different from a wavelength of the excitation light, said at least one core formed of a semiconductor selected from InxGayAl1−x−yN (0≦x≦1, 0≦y≦1, x+y≦1), and ZnxMgyCd1−x−ySevS1−v(0≦x≦1, 0≦y≦1, x+y≦1, 0≦v≦1);
- and
- said particle has a particle size for causing Mie scattering with respect to said excitation light.
A fluorescent member comprising a plurality of particles dispersed in a medium, wherein
- each of said particles includes at least one core and a coating layer covering the at least one core,
- said at least one core has a diameter of between 5 nm and 16 nm and is formed of a semiconductor for absorbing excitation light and emitting light having a wavelength different from a wavelength of the excitation light, said at least one core is formed of a semiconductor selected from InxGayAl1−x−yN (0≦x≦1, 0≦y≦1, x+y≦1), and ZnxMgyCd1−x−ySevS1−v(0≦x≦1, 0≦y≦1, x+y≦1, 0≦v≦1);
- and
- a particle size D (μm) of said particle and a wavelength λ(μm) of said excitation light satisfy a relation of D/λ≦0.2.
A fluorescent member comprising a plurality of particles dispersed in a medium, wherein
- each of said particles includes at least one core and a coating layer covering the at least one core,
- said at least one core has a diameter of between 5 nm and about 13 nm and is formed of a semiconductor for absorbing excitation light and emitting light having a wavelength different from a wavelength of the excitation light, said at least one core formed of a semiconductor selected from Si, and C;
- and
- said particle has a particle size for causing Mie scattering with respect to said excitation light.
A fluorescent member comprising a plurality of particles dispersed in a medium, wherein
- each of said particles includes at least one core and a coating layer covering the at least one core,
- said at least one core has a diameter of between 5 nm and 13 nm and is formed of a semiconductor for absorbing excitation light and emitting light having a wavelength different from a wavelength of the excitation light, said at least one core is formed of a semiconductor selected from Si, and C;
- and
- a particle size D) (μm) of said particle and a wavelength λ(μm) of said excitation light satisfy a relation of D/λ≦0.2.
Dependencies are inferred from the claim text.