OPTICAL LENS FOR LIGHT EMITTING DIODE DEVICE

摘要

An optical lens for an LED includes an upper portion defining a light extraction face, a lower portion and an annular flange between the upper and lower portions. The lower portion has a wall section defining a cavity for receiving the LED therein, and a curved lateral side. A lateral light generated by the LED and running against the curved lateral side has at least a part being refracted or reflected thereby to run through the light extraction face of the optical lens.

主权项

1. An optical lens comprising:
an upper portion comprising a top face that defines a central depression recessed downwardly and a side face wherein the top face and a side face of the upper portion together constituting a light extraction face for the optical lens; a lower portion comprising a bottom face and a lateral face, wherein the bottom face of the lower portion that defines a cavity recessed upwardly toward the central depression, the cavity being configured for receiving a light source therein; and a flange between the upper portion and the lower portion; wherein the lateral face of the lower portion being curved whereby at least a part of lateral light generated by the light source and running against the lateral face of the lower portion being refracted/reflected thereby to move to the light extraction face of the optical lens.