Patent ID: 8482186
Filing Date: 2013-07-09
Classification: F21K,F21V,F21W,F21Y,G02B

Abstract:
1. A lighting device, comprising: a light guide body, having a first end, a second end opposite to the first end, and a side surface to join the first end and the second end, wherein the first end is larger than the second end, and a local scattering region by a roughen surface is disposed on and protrudes outside the second end, and wherein the local scattering region in all of its transverse cross sections is smaller or equal to the second end, wherein the light guide body has cutting surfaces at a region other than the local scattering region to produce sparkling effect; and at least one light-emitting unit, capable of emitting a light into the light guide body, disposed adjacent to the first end, wherein at least one portion of the light is guided within the light guide body to reach the local scattering region, and the local scattering region with an effect to destroy total internal reflection scatters and refracts the light through the local scattering region to a space external to the light guide body as a local light source region.