Light diffusing lens and light emitting device including the same

A light diffusing lens, comprising:

• a light incident portion having a concave shape depressed inwards from a lower portion of the light diffusing lens;
• a reflective portion having a concave shape depressed inwards from an upper portion of the light diffusing lens;
• and
• a light exit portion defined by an outer side surface of the light diffusing lens,
• wherein the light incident portion comprises a first flat face gradually narrowed in an inward direction of the light diffusing lens with respect to a direction of an optical axis defined by a straight line passing through a center of the light diffusing lens.

A light emitting device, comprising:

• a light emitting element;
• and
• a light diffusing lens disposed on the light emitting element and comprising a light incident portion, a reflective portion, and a light exit portion,
• wherein the light incident portion has a concave shape depressed inwards from a lower portion of the light diffusing lens, the reflective portion has a concave shape depressed inwards from an upper portion of the light diffusing lens, and the light exit portion is defined by an outer side surface of the light diffusing lens, and
• wherein the light incident portion comprises at least one of a first convex face bulging in a direction of an optical axis defined by a straight line passing through a center of the light diffusing lens and a first flat face gradually narrowed in an inward direction of the light difusing lens with respect to the direction of the optical axis defined by the straight line passing through the center of the light diffusing lens.