Patent ID: 9611986
Date: 2017-04-04
CPC Classifications: F21K,F21V,F21Y,G02B

Claim:
1. An LED light-diffusing lens adopting an asymmetric free curved surface equation, wherein the LED light-diffusing lens has a body which is formed in a lens structure, the body comprising: a light-incident inner surface configured to primarily induce light uniformity of an LED light source by an aspheric surface forming an inner line of the body of the lens structure, wherein the light-incident inner surface is formed as a curved surface recessed in a curved line shape having at least one peak and valley, and including an icicle type light adjusting protrusion disposed at the central portion to protrude towards the LED serving as the light source, wherein the light-incident inner surface includes an X-axis-directional light-incident inner surface and a Y-axis-directional light-incident inner surface; a light-emitting outer surface configured to induce secondary light diffusion by an aspheric surface forming an outer line of the body to illuminate a target region widely, wherein the light-emitting outer surface is a convex curved surface and includes an X-axis-directional light-emitting outer surface formed as an asymmetric curved surface structure, and a Y-axis-directional light-emitting outer surface as a convex symmetric curved surface structure; wherein the light-emitting outer surface (T) is expressed as a non-linear free curved surface equation as follows: wherein α is 0; wherein x is X-axis-directional light-incident outer surface; wherein y is Y-axis directional light-incident outer surface; wherein z is the Z axis directional light-incident outer surface; and wherein the light-emitting outer surface is formed to satisfy a condition that an odd-order term of any one of variables x, y, and z is always 0.