Light-emitting device and lamp
A light-emitting device including: a base which is translucent; a semiconductor light-emitting element provided on the base; a sealing member for sealing the semiconductor light-emitting element and including a first wavelength conversion material for converting a wavelength of light emitted by the semiconductor light-emitting element to a predetermined wavelength; and a groove provided on a side of the semiconductor light-emitting element, recessed from a top surface of the base on which the semiconductor light-emitting element is provided or a back surface of the base which is a surface opposite to the top surface, and for holding a second wavelength conversion material for converting the wavelength of the light emitted by the semiconductor light-emitting element to the predetermined wavelength.
1. A light-emitting device comprising:
a base which is translucent;
a semiconductor light-emitting element provided on said base;
a sealing member for sealing said semiconductor light-emitting element and including a first wavelength conversion material for converting a wavelength of light emitted by said semiconductor light-emitting element to a predetermined wavelength; and
a groove provided on a side of said semiconductor light-emitting element, recessed from a top surface of said base on which said semiconductor light-emitting element is provided or a back surface of said base which is a surface opposite to the top surface, and for holding a second wavelength conversion material for converting the wavelength of the light emitted by said semiconductor light-emitting element to the predetermined wavelength,
wherein said groove is provided in said base at a position in which the light emitted by said semiconductor light-emitting element passes through a part of said base and said groove, is converted by the second wavelength conversion material held in said groove to have the predetermined wavelength, and is emitted from a side surface of said base.
2. The light-emitting device according to claim 1 ,
wherein said groove is provided on both sides of said semiconductor light-emitting element.
3. The light-emitting device according to claim 1 ,
wherein said groove is provided around said semiconductor light-emitting element.
4. The light-emitting device according to claim 1 ,
wherein the first wavelength conversion material and the second wavelength conversion material are made of a same material, and
said sealing member seals said semiconductor light-emitting element and is filled inside of said groove so that the second wavelength conversion material is held in said groove.
5. The light-emitting device according to claim 1 , further comprising
a wavelength conversion part provided on the back surface of said base, and including a third wavelength conversion material for converting the wavelength of the light emitted by said semiconductor light-emitting element to the predetermined wavelength.
6. The light-emitting device according to claim 5 ,
wherein said wavelength conversion part is a sintered material film formed on the back surface, and
the sintered material film includes the third wavelength conversion material and a binder for sintering made of an inorganic material.
7. The light-emitting device according to claim 5 ,
wherein the first wavelength conversion material, the second wavelength conversion material, and the third wavelength conversion material are phosphor particles which are excited by the light emitted by said semiconductor light-emitting element and emit light.
8. The light-emitting device according to claim 1 ,
wherein a plurality of said semiconductor light-emitting elements are provided on the top surface of said base, and at least part of said groove is extended along a direction in which the plurality of semiconductor light-emitting elements are arranged.
9. A lamp comprising
the light-emitting device according to claim 1 .