Patent attributes
A light emitting device, comprises: a light emitting element; a plurality of lead frames electrically connected to the light emitting element; and a package that extends in the lengthwise direction, has an opening in its front face for taking out light from the light emitting element, and makes one end of the lead frames to protrude to the outside thereof and sandwiches at least a part thereof, wherein the package has cut-outs in part of its outer surface on both sides in the lengthwise direction of the opening on the front face side, and the width of the cut-outs in the lengthwise direction increases from the rear face side toward the front face side, and the depth from the top face side toward the bottom face side increases from the rear face side toward the front face side.