Patent ID: 8757834

Claim:
A variable shaped lamp shade of an LED lamp, and the lamp shade being made of a translucent material matched with an LED lamp strip and a lamp holder, and the lamp shade comprising: at least one optical refraction unit arranged annularly to form a ring-shaped lamp shade and having an external refractive surface, an internal refractive surface corresponding to the external refractive surface, and an assembling structure for matching the lamp holder, wherein a light beam emitted from the LED lamp strip undergoes a first-time refraction when passing through the internal refractive surface and undergoes a second-time refraction when passing through the external refractive surface such that an angle of distributed light at edges is controlled within a range of 30 degrees to 100 degrees, wherein the external refractive surface of the optical refraction unit is formed on a curved surface without an inflection point, and the curved surface has a constant or gradually changing curvature, and the internal refractive surface of the optical refraction unit is a curved surface with one or more inflection points, and the curved surface has a gradually changing curvature.