Patent ID: 7891843

Claim:
An LED lighting device comprising: an LED configured to irradiate light external to the LED lighting device; a first lens having a lower part in which the LED is provided and having a convex form to diffuse light incident from the LED through the lower part thereof, the first lens including: a first lens bottom surface to which light irradiated from the LED is incident; a first lens side surface extending upward from the first lens bottom surface and configured such that a horizontal distance between the first lens side surface and a line, which starts from a center part of the first lens bottom surface and is orthogonal to the first lens bottom surface, is generally decreased with increasing distance from the first lens bottom surface; and a first lens upper surface extending horizontally from an upper end of the first lens side surface; and a second lens provided on the outside of the first lens and having a rough surface formed on an inner surface thereof to diffusedly reflect light diffused through the first lens, the rough surface having a plurality of fine protrusions projecting toward the first lens so that light diffused through the first lens is diffusedly reflected, and a part of the second lens corresponding to the first lens upper surface having a U-shaped cross-section depressed towards the first lens.