Light-emitting device

摘要

In a semiconductor light-emitting device, light from a laser diode is output to the outside after the luminance of the light being enhanced. It includes a support body provided with lead terminals, one or more laser diodes mounted on the support body, a cylindrical reflector fixed to the support body to surround the laser diode(s) and provided with a light reflection surface formed on an inner surface thereof, and a cap placed to cover an opening distal end face of the reflector and held at an opening distal end part of the reflector, the cap being provided at a central part thereof with a solid fluorescent member including a fluorescent substance that is excited by the light from the laser diode and emits light different in colors from light emitted by the laser diode.

主权项

1. A light-emitting device comprising:
a disk shaped support body; a light-emitting element constituted by a laser diode mounted on the support body; a cylindrical reflector, having openings at opposite ends, fixed to the support body to close one of said opposite ends and provided with a light reflection surface on its inner surface surrounding the light-emitting element; and a cap having a wavelength conversion member positioned at an interior portion of the cap, and a translucent member surrounding the wavelength conversion member, the wavelength conversion member extending completely through the cap and emitting light having a wavelength different from that of the light emitted by the light-emitting element when irradiated with light from the light-emitting element, and the cap being placed on the reflector to cover the other one of said openings of the reflector, wherein the wavelength conversion member being held by the translucent member at its outer periphery, wherein a planar shape of the wavelength conversion member being substantially coincident with a cross-sectional beam pattern shape of emitted output light from the light-emitting element on an irradiated surface and is being evenly wavelength-converted.