| 摘要 |
A light-emitting device comprises a base where a wiring conductor is formed over the top to bottom surfaces or over the top to side surfaces, a light-emitting element mounted on the top surface of the base and electrically connected to the wiring conductor, a first light-transmitting section covering the light-emitting element, a second light-transmitting section disposed over the first light-transmitting section, covering the first light-transmitting element, and made of a light-transmitting material containing a phosphor for converting the wavelength of the light emitted from the light-emitting element and a third light-transmitting section interposed between the first and second light-transmitting sections. The following relations are satisfied: n3<n1 and n3<n2 where n1 is the refractive index of the first light-transmitting section, n2 is that of the second light-transmitting section, and n3 is that of the third light-transmitting section. With this constitution, a high light extraction efficiency, a high radiated light intensity, a high axial direction luminous intensity, and a high luminance can be realized. |
