Patent ID: 7316488
Filing Date: 2008-01-08
Classification: F21S,F21Y,H01L

Abstract:
1. A light emitting device comprising: a light emitting diode (LED) die; a mounting surface supporting the LED die, the LED die having a circumference in a plane parallel to the mounting surface; and an opaque beam shutter affixed to the mounting surface proximate to the LED die for shaping a light emission pattern, the beam shutter being provided around a portion, but not all, of the circumference of the LED die so that the beam shutter blocks light directly emitted by the LED die through a portion of the circumference but does not block light through a remaining portion of the circumference, the beam shutter causing an asymmetrical light pattern to be created, wherein no part of the beam shutter resides directly over a top surface of the LED die so as to not block or reflect light that has been emitted by the LED die in a direction perpendicular to the top surface of the LED die.