Patent ID: 9741914
Date: 2017-08-22
CPC Classifications: G02B,G02F,H01L

Claim:
1. A lens for a light-emitting device, the lens comprising: a lens body comprising a light-receiving portion provided in a lower surface of the lens body, a light-emitting portion provided on an upper surface of the lens body, and a recess provided at a center of the upper surface of the lens body; and a flat portion provided in a horizontal shape on a bottom surface of the recess and perpendicular to a main emission line of light emitted from a light-emitting device such that at least part of light received through the light-receiving portion emits upwardly, wherein a diameter of the flat portion is 1/100 to 1/10 of an inlet diameter of the light-receiving portion, wherein the light-receiving portion is a dome-shaped recess which is concave upward, wherein the light-emitting portion has a cross section comprising a left hemisphere including a first curvature and a first curvature center located at a left side of a centerline, and a right hemisphere including the first curvature and a second curvature center located at a right side of the centerline, wherein the recess includes a cross section comprising: a left recess provided from a top surface of the left hemisphere toward a top center point of the light-receiving portion, and a right recess provided from a top surface of the right hemisphere toward the top center point of the light-receiving portion, and wherein the flat portion includes a cross section provided between the left and right recesses.