Patent ID: 8633641
Filing Date: 2014-01-21
Classification: F21V,F21Y,G02B,H01L

Abstract:
1. A side illumination lens for a light emitting diode (LED), the lens comprising: a first total internal reflection surface, configured in a first angle with respect to a longitudinal axis of the lens; a second total internal reflection surface, neighbored to the first total internal reflection surface and configured in a second angle larger than the first angle with respect to the longitudinal axis of the lens; a third total internal reflection surface, neighbored to the second total internal reflection surface and configured in a third angle larger than the second angle with respect to the longitudinal axis of the lens; a fourth total internal reflection surface, neighbored to the third total internal reflection surface and configured in a fourth angle larger than the third angle with respect to the longitudinal axis of the lens; a first exiting surface, neighbored to the fourth total internal reflection surface and configured in a fifth angle larger than the fourth angle with respect to the longitudinal axis of the lens; and a second exiting surface, neighbored to the first exiting surface and configured in a sixth angle larger than the fifth angle with respect to the longitudinal axis of the lens.