Patent ID: 9625118
Date: 2017-04-18
CPC Classifications: F21V,G02B,H01L

Claim:
1. An optical lens comprising: a bottom surface; a recess part at a center region of the bottom surface; a light exit surface provided opposite to the bottom surface and having a convex curved surface; an outer sidewall connected between an edge of the bottom surface and a lower portion of the light exit surface; a recess portion provided opposite to the bottom surface and recessed toward the bottom surface; and a convex portion provided between the recess portion and the light exit surface, wherein the recess part is concave in a direction toward the recess portion from the bottom surface, wherein the recess portion includes a first total-reflection surface having a first concave curved surface at a center region of the recess portion, a second total-reflection surface that extends from the first total-reflection surface, a third total-reflection surface having a second concave curved surface that extends from the second total-reflection surface, wherein the first concave curved surface of the first total-reflection surface corresponds to the recess part, wherein the second total-reflection surface is disposed between the first total-reflection surface and the third total-reflection surface, wherein the convex portion is provided between a inflection point and an apex of the light exit surface, wherein the first total-reflection surface, the second total-reflection surface and the third total-reflection surface have curvatures different from each other, wherein the apex of the light exit surface is connected to a portion of the convex portion, wherein the convex portion is connected to the third total-reflection surface at the inflection point, wherein the third total-reflection surface is concave between the second total-reflection surface and the convex portion, and wherein the third total-reflection surface and the convex portion have surfaces curved in opposite directions to each other about the inflection point.