Bat-wing lens design with multi-die

摘要

A batwing beam is produced from an optical emitter having a primary LED lens over a number of LED dies on a package substrate. The LED lens includes a batwing surface formed by rotating a parabolic arc about an end of the parabolic arc over a center of the optical emitter. A center of each of the LED dies is mounted to the package substrate about the focus of a parabola whose arc forms the batwing surface, for example, between about 0.5 to 1.5 of a focal distance from the vertex of the parabola. The batwing surface reflects light from the number of LED dies through total internal reflection (TIR) or through a reflectivity gel coating.

主权项

1. A method, comprising:
attaching a plurality of light-emitting devices to a substrate; forming a lens on the plurality of light-emitting devices directly through a molding process, the lens covering the side surfaces of the plurality of light-emitting devices, wherein the forming of the lens comprises forming an upper surface that is defined by rotating an arc around a vertical axis; and thereafter curing the lens, wherein the attaching of the plurality of light-emitting devices and the forming of the lens are performed in a manner such that the plurality of light-emitting devices are symmetrically disposed around the vertical axis.