Patent ID: 6530679
Filing Date: 2003-03-11
Classification: F21S,F21V,F21Y,Y02B,Y10S

Abstract:
A light-emitting device comprising:a cylindrical main cover opened at both ends; two sheets of a main plate disposed inside said main cover, extending in a direction intersecting the axial direction of said cylindrical main cover; plural LED elements spaced on the surfaces of the two sheets of said main plate; a power unit which enables said LED elements to emit light; two first light scattering plates extending in a direction intersecting the axial direction of said cylindrical main cover, disposed near to each end of said main cover; two second light scattering plates having a convex shape protruding to the outside, disposed outside each of said first light scattering plates; wherein a plurality of prisms forming concentric circles are formed on at least one surface of each of said first and second light scattering plate; and wherein the light emitted from said LED elements is scattered by means of said prisms on the surface of each of said first and second light scattering plate.