| 摘要 |
PURPOSE:To enable to effectively augment the luminous flux, which is radiated from the light-emitting element of a light-emitting diode, and to significantly enhance the illuminance of the light-emitting diode by a method wherein a convex lens part is formed on the upper center-part of the light-emitting element, where is molded with a resin, and a parallel light ray lead-out part is integrally formed in one body with the convex lens part in such a way as to surround the convex lens part. CONSTITUTION:A light-emitting element 11 is mounted on the top part of a lead frame 12. The upper end parts of the light-emitting element 11, the lead frame 12 and a lead frame 13 are molded with a light-transmitting resin to form a convex lens part 15 and the end part 15a of the convex lens part 15, where is located on the side whereon a luminous flux from the light-emitting element 11 is irradiated, is formed into a spherical configuration. A parallel light ray lead-out part 16 is integrally formed in one body with the convex lens part 15 in such a way as to surround the convex lens part 15, the parallel light ray lead-out part 16 is formed its whole configuration into a bowl configuration, the upper surface 16a thereof is made flat, and at the same time, the outer peripheral surface 16b thereof is formed into a curved surface configuration. This curved surface 16b is formed into the configuration of a parabolic curved surface with the light-emitting element 11 as the focal point and the light rays to go to the side direction of the convex lens 15, which do not go to the end part 15a, among the light rays to be radiated from the light-emitting element 11 are all made to reflect to the front side of the convex lens 15 by this curved surface in such a way as to become parallel to an optical axis X. |
