Patent ID: 8704256

Claim:
A lens-mounted light emitting unit comprising: a base plate; multiple LED elements placed on the base plate; and a lens unit having a shape of a body of revolution about a normal line of the base plate as a symmetry axis of revolution which passes through substantially the center of gravity of the multiple LED elements, in which the multiple LED elements include LED elements of multiple light colors, while the lens unit color-mixes and emits light from the LED elements, wherein the lens unit comprises: an emitting surface perpendicular to the normal line of the base plate; a reflecting surface extending convexly toward the base plate from the emitting surface; a side incident surface which is replicated toward the emitting surface from an end of the base plate side of the reflecting surface; and an upper incident surface which bounds an end of the side incident surface which does not contact the reflecting surface, contact points between the side incident surface and the upper incident surface, intersection points at which light paths from an LED element refracted at the contact points intersect the emitting surface, the LED element farthest from a respective contact point, a circle is formed by continuously connecting such intersection points, the emitting surface is configured to allow different diffusion angles inside the circle from outside the circle, so that the diffusion angles inside the circle are larger than the diffusion angles outside the circle, and the structure of the emitting surface having different diffusion angles includes one of a diffusion sheet attached to the emitting surface and a concave-convex shape formed on the emitting surface.