Light diffusing lens for light emitting device

An assembly comprising:

• a substrate having a surface;
• an LED mounted on the surface of the substrate;
• a light diffusing lens comprising a main body having a lower surface and an upper surface, the lower surface having a light entering portion and a reflection portion, the light entering portion being formed about a center thereof, the light entering portion being concavely formed, the reflection portion extending from a circumference of the light entering portion to a circumference of a lower edge of the upper surface, the reflection portion being coupled to the substrate of the surface, the LED being positioned below the light entering portion, the upper surface having a light emitting portion, a flange, and a lower end portion, the light emitting portion formed about a center thereof, the light emitting portion being concavely formed, the lower end portion extending upwardly from the lower edge of the upper surface to an upper edge thereof, the flange protruding outwardly in a circumferential manner from between a lower edge of the light emitting portion and the upper edge of the lower end portion, the flange defining a lower surface which is connected to the lower end portion, an upper surface which is connected to the light emitting portion, and an outward circumferential surface which connects the upper and lower surfaces, wherein a recess is defined that is bounded by the surface of the substrate, the lower surface of the flange and the lower end portion;
• and
• a reflection sheet coupled to the surface of the substrate, wherein an end of the reflection sheet is positioned within the recess and is further coupled to the lower surface of the flange;
• wherein the flange has at least one pressing protrusion protruding outwardly from the outward circumferential surface, wherein the recess is defined below the lower surface of the flange, below a lower surface of the at least one pressing protrusion, and outward from the lower end portion, the recess being configured to allow a reflection sheet to be positioned therein and to be coupled to the lower surface of the at least one pressing protrusion.