Patent ID: 8162513
Filing Date: 2012-04-24
Classification: F21S,F21V,F21Y,G02B

Abstract:
1. An illumination device comprising: a solid-state light source configured for generating light, the solid-state light source defining a central axis; and an anti-glare plate arranged generally adjacent to the solid-state light source, the plate comprising an incident surface and an output surface at opposite sides thereof, the incident surface positioned for receiving the light from the solid-state light source, and the output surface being for emission of the light to an outside of the illumination device, one of the incident surface and the output surface having a plurality of parallel elongated first micro-structures each have a length parallel to a first axis of a 3-dimensional coordinate system, the first micro-structures being arranged in two groups at opposite sides of the central axis, the first micro-structures of the two groups being symmetrical relative to each other across the central axis, and the first micro-structures configured for contracting a radiating range of the light entering the plate, the contraction of one of the groups of first micro-structures being along one direction of a second axis of the 3-dimensional coordinate system, the contraction of the other group of first micro-structures being along an opposite direction of the second axis, the second axis being substantially perpendicular to the first axis; wherein the other one of the incident surface and the output surface has a plurality of elongated second micro-structures formed thereon, each of the second micro-structures has a length parallel to the second axis, and the second micro-structures are configured for contracting the radiating range of the light entering the plate, such contraction being along respective opposite directions of the first axis.