Semiconductor light emitting device
AssigneeKabushiki Kaisha Toshiba
InventorsKazuaki Otsuka, Hatsuo Takezawa, Masaaki Tamatani
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Abstract
In one aspect of the present invention, a semiconductor light emitting device may include a light emitting element configured to emit a first wavelength light and a phosphor configured to absorb the first wavelength light and emit light of a second wavelength which is different from the first wavelength. The phosphor contains a silicate represented by the formula (Me1-yEuy)2SiO4, wherein Me is at least one element selected from the group consisting of Ba, Sr, Ca and Mg, and y is >0. The phosphor has a grain size of from about 10 to about 50 micrometers.
Claims20
A semiconductor light emitting device, comprising:
- a light emitting element configured to emit a first wavelength light;
- and
- a phosphor configured to absorb the first wavelength light and emit light of a second wavelength which is different from the first wavelength, wherein the phosphor contains a silicate represented by the formula (Me1-yEuy)2SiO4, wherein Me is at least one element selected from the group consisting of Ba, Sr, Ca and Mg, and y is >0, and wherein the phosphor has a grain size of from about 10 to about 50 micrometers.
A semiconductor light emitting device, comprising:
- a light emitting element configured to emit a first wavelength light;
- a phosphor configured to absorb the first wavelength light and emit light of a second wavelength which is different from the first wavelength, wherein the phosphor contains a silicate represented by the formula (Me1-yEuy)2SiO4, wherein Me is at least one element selected from the group consisting of Ba, Sr, Ca and Mg, and y is >0, and wherein the phosphor has a grain size of from about 10 to about 50 micrometers;
- and
- a particle provided on the phosphor, wherein the particle has a grain size which is less than the grain size of the phosphor.
A semiconductor light emitting device, comprising:
- a light emitting element configured to emit a first wavelength light;
- a first configured to absorb the first wavelength light and emit light of a second wavelength which is different from the first wavelength, wherein the first phosphor contains a silicate represented by the formula (Me1-yEuy)2SiO4, wherein Me is at least one element selected from the group consisting of Ba, Sr, Ca and Mg, and y is >0, and wherein the first phosphor has a grain size of from about 10 to about 50 micrometers;
- and
- a second phosphor configured to absorb the first wavelength light and emit a third wavelength light, wherein the third wavelength light is different in wavelength from the first wavelength light and from the second wavelength light.
Dependencies are inferred from the claim text.