Package for light emitting element and manufacturing method thereof

A package for a light emitting element comprising:

• a package main body where a plurality of peripheral concave portions are formed around a central concave portion in which a light emitting element is arranged on the bottom portion;
• and
• a translucent member provided in the central concave portion and the plurality of peripheral concave portions in common,
• the central concave portion being composed of a bottom face on which the light emitting element is arranged, and an inner wall face intersecting with the bottom face with a predetermined angle in an inverted truncated cone shape,
• wherein the inner wall face provides diffuse reflection, and
• wherein the angle between the inner wall face and the bottom face is selected within ±15° of the incident critical angle in which a direct light radiated from the light emitting element undergoes total reflection at the interface between the translucent member and air, the angle between the inner wall face of the plurality of peripheral concave portions and the bottom face is set nearly equal to the corresponding angle of the central concave portion.

A package for a light emitting element comprising:

• a package main body on which a plurality of concentric circular reflecting grooves are formed around a central concave portion a light emitting element is arranged on bottom portion thereof;
• and
• a translucent member provided in the central concave portion and a plurality of reflecting grooves which are formed on the package main body in common;
• the central concave portion is formed in an inverted truncated cone shape by a bottom face on which the light emitting element is arranged, and an inner wall face intersecting with the bottom face with a predetermined angle, the angle between the inner wall face and the bottom face is selected within ±15° of the incident critical angle in which a direct light radiated from the light emitting element undergoes total reflection at the interface between the translucent member and air, the angles between plurality of inner wall face and the bottom face of the peripheral concave portions are nearly equal to the corresponding angles of the central concave portions.

A manufacturing method of a package of a light emitting element comprising:

• preparing a package main body composed of a bottom face on which the light emitting element is arranged and a concave portion which is formed in an inverted truncated cone shape on an inner wall face intersecting with the bottom face with a predetermined angle;
• preparing a translucent member filled in the concave portion;
• processing the inner wall face so as to provide diffuse reflection;
• and
• selecting the angle between the inner wall face composing the concave portion and the bottom face to be within ±15° of the incident critical angle in which a direct light radiated from the light emitting element undergoes total reflection at the interface between the translucent member and air.