Patent ID: 8794777

Claim:
A light emitting device comprising: a substrate; one or more semiconductor light emitting elements provided on the substrate; a sealing member which is provided so as to cover the one or more semiconductor light emitting elements; and a lens made up of a plurality of convex parts and a concave part, wherein the plurality of convex parts are arranged so as to form an n-fold rotational symmetric shape, and the concave part is arranged so as to form an n-fold rotational symmetric shape where n is an integer of 2 or more, said light emitting device emitting light having a non-concentric luminance distribution made up of a plurality of bright regions and a plurality of dark regions, the non-concentric luminance distribution being observed on a plane which is parallel to the substrate, wherein at least one of the plurality of convex parts extends along a diagonal line seen from a plane view, the plurality of convex parts protrude away from the substrate in a direction parallel to a rotational symmetric axis of the light emitting device, the light emitting device is arranged alongside a second light emitting device comprising one or more semiconductor light emitting elements, so that a bright region created by the second light emitting device overlaps with a dark region created by the light emitting device, and when the light emitting device comprises a plurality of semiconductor light emitting elements, the plurality of semiconductor light emitting elements are positioned to form an n-sided polygon, and, each one of the plurality of semiconductor light emitting elements is completely contained inside each one of the plurality of convex parts.