Patent ID: 9606399
Date: 2017-03-28
CPC Classifications: F21K,G02B,G02F,Y10T

Claim:
1. A member for controlling luminous flux comprising: an incident surface where light is incident on; a refractive surface where the light is emitted from the incident surface; and a rear surface extended from the incident surface to the refractive surface, where a central axis is defined by an axis extended from a center of the incident surface to a center of the refractive surface, and wherein the refractive surface includes a first refractive surface extended from the rear surface, where a distance from the central axis is gradually increased as the first refractive surface recedes from the rear surface, and a second refractive surface that is curved and extended from the first refractive surface, where a distance from the central axis is gradually decreased as the second refractive surface recedes from the rear surface, wherein the refractive surface is formed with a recess surface opposite to the incident surface, and the second refractive surface is extended from the first refractive surface to an outside of the recess surface, wherein the recess surface totally reflects the light emitted from a light emitting diode, and the light reflected by the recess surface is selectively refracted by the first and second refractive surfaces, and wherein the luminous flux control member is in direct contact with a driving substrate, and a shape of the luminous flux control member is arranged with a shape of light emitting diode.