Patent ID: 6955453

Claim:
A spread illuminating apparatus comprising: at least one spot-like light source; and a light conductive plate, which has the at least one spot-like light source disposed close to its light entrance surface, and which allows light emitted from the at least one spot-like light source and introduced therein through the light entrance surface to exit through its light exit surface toward an object to be illuminated, wherein the light exit surface is provided with a light scattering means comprising a plurality of mechanisms which are each formed so as to be oriented in a direction perpendicular to the light entrance surface and to be continuously arrayed along the light entrance surface, and which are adapted to scatter the light emitted from the at least one spot-like light source with respect to a direction parallel to the light entrance surface, and wherein a surface of the light conductive plate opposite to the light exit surface is provided with an optical path conversion means comprising a plurality of paired slanting surfaces which are formed so as to be oriented in the direction parallel to the light entrance surface.