Patent ID: 8240888

Claim:
An LED (light emitting diode) unit, comprising: an LED; and a lens mounted on the LED; wherein the LED has a vertical surface abutting against the lens to prevent the lens from a horizontal movement, and a horizontal surface abutting against the lens to prevent the lens from a vertical movement; and wherein the lens has two intersecting grooves defined in a bottom face thereof, a chassis of the LED being fitted in one of the two intersecting grooves; wherein the lens has a hole located above and communicating with the two grooves, and the LED has a circular base above the chassis thereof and received in the hole of the lens; wherein the hole is confined by two opposite first surfaces and two opposite second surfaces, and the two second surfaces each have a curvature which is different from that of each of the two first surfaces; wherein the lens has a chamber communicating with and located above the hole, the chamber being confined by a third surface; and wherein the two first surfaces are separated from the third surface via two narrow surfaces, and the two second surfaces are directly connected to the third surface.