Application of a novel focused microlens to the LED packaging

The light-emitting diode (LED) has been extensively applied to the lighting system. In this paper, a novel optical structure design of the focused microlens, it can achieve a specific light focusing effect through changing the structural design. We modified and redesigned the optical microlens structure from the basic specification of the present LED packaging, and the light pattern can be altered through adjusting the proportion of depth and width of the structure. The light focusing ability of this novel focused microlens has been greatly enhanced within the range ±15° of the lighting angle. The maximum illuminance has been enhanced 99.3% in comparison with the traditional LED packaging, and the average luminous flux rayed out through within the range ±15° from the normal of the LED has been enhanced 34% as well.