Patent ID: 7540635

Claim:
A Light Emitting Device (LED) light source lens for emitting light in a lateral direction, comprising: an upper part including an upper part reflecting surface bending symmetrically with respect to a central axis of the lens, and an upper part refracting surface extending from an end of the upper part reflecting surface parallel with the central axis; a central part including a side surface extending from a lower end of the upper part refracting surface and bending inwardly toward the central axis, and the light being selectively refracted or reflected through the side surface; and a lower part accommodating the LED light source, and including an arch-shaped lower part refracting surface extending outwards from a lower end of the side surface of the central part; wherein the light radiated from the LED light source is emitted perpendicular to the central axis; wherein the bent side surface of the central part comprises an inclined surface at least partially inclining inwardly toward the central axis, and the light is refracted or reflected through the inclined surface; wherein the inclined surface has an upper end bending and extending to a lower end of the upper part refracting surface, and a lower end bending and extending to the lower part refracting surface; wherein the upper end of the inclined surface extends outwardly perpendicular to the central axis, and the lower end of the inclined surface extends inwardly perpendicular to the central axis.