Light-emitting device

摘要

Disclosed is a light-emitting device having a wide luminous-intensity distribution characteristic with a simple structure. The light-emitting device includes a resin package in which an LED chip, a first inner portion of a first lead terminal, and a second inner portion of a second lead terminal are accommodated and which has a second recess portion formed so that a portion including a first recess portion of the first inner portion of the first lead terminal as well as a portion of the second inner portion of the second lead terminal are exposed to a bottom portion of the second recess portion, and a resin portion containing phosphors and filled in the first recess portion of the first lead terminal and in the second recess portion of the resin package. A photoreflective filler is contained in a region opposed to the LED chip of the resin portion including the phosphors.

主权项

1. A light-emitting device comprising:
a semiconductor light-emitting element; a lead terminal having a first recess portion for placement of the semiconductor light-emitting element therein; a resin package in which the semiconductor light-emitting element and a portion of the lead terminal including the first recess portion are accommodated, the resin package also having a second recess portion which is so formed that the portion of the lead terminal including the first recess portion is exposed to a bottom portion of the second recess portion; and a resin portion containing phosphors filled in the first recess portion of the lead terminal and in the second recess portion of the resin package, wherein a photoreflective filler is contained in the resin portion containing the phosphors, the second recess portion of the resin package has a rectangular-shaped opening, a wall surface of the first recess portion of the lead terminal is a gentle slope surface which is gently sloped so as to gradually broaden from a bottom side toward an opening of the first recess portion of the lead terminal, a wall surface of the second recess portion of the resin package is a slope surface which is sloped so as to gradually broaden from the bottom side toward the opening of the second recess portion of the resin package, and light derived from the photoreflective filler of the resin portion containing the phosphors and from the phosphors is reflected by surfaces including, as arranged in order along a longer-side direction of the second recess portion of the resin package, the bottom face and the gentle slope surface of the first recess portion of the lead terminal, a flat surface of the lead terminal, and the slope surface of the second recess portion of the resin package.