Patent ID: 7922370

Claim:
An LED module comprising: an LED for generating light; and a lens covering the LED for refracting light emitted by the LED, the lens having a center axis and a concave incident face for incidence of the light and an opposite convex emitting face for refracting the light out of the lens; wherein the emitting face comprising a portion with a curvature radius at any point along a first plane being larger than a distance between the point and the LED, and larger than a curvature radius at a corresponding point of the incident face on the first plane; wherein a curvature radius at any point of the portion of the emitting face along a second plane which is perpendicularly intersected with the first plane at the center axis being larger than a distance between the point and the LED, while smaller than a curvature radius of a corresponding point at the incident face on the second plane; and wherein a radiating angle of the LED module in the first plane is larger than that of the LED module in the second plane.