Patent ID: 8789993
Filing Date: 2014-07-29
Classification: G02B

Abstract:
1. A light-emitting device, comprising: a light guide comprising a first and a second output surface portion; a plurality of light-outcoupling elements optically coupled to the first surface portion; and an array of beam-forming structures arranged adjacent to the second surface portion; wherein said light-outcoupling elements are positionally arranged relatively to said beam-forming structures such as to enable light impinging on at least one of said light-outcoupling elements and subsequently being incident on a surface portion of a beam-forming structure to be within a predetermined angle interval with respect to said surface portion; wherein each of said beam-forming structures is adapted to enable light leaving a surface portion of said beam-forming structure to be within a predetermined angle interval with respect to said surface portion; wherein each beam-forming structure is selected from at least a first type or a second type of beam-forming structures having different transmission and/or reflection properties such that the array of beam-forming structures comprises at least one beam-forming structure of the first type and at least one beam-forming structure of the second type, each beam-forming structure of the first type being aligned with a respective light-outcoupling element; and wherein the second type of beam-forming structure is selected from a group comprising at least one micro-prismatic optical element and at least one light-angle selective transflector.