Patent ID: 8936384
Filing Date: 2015-01-20
Classification: G02B

Abstract:
1. A planar light guide comprising: a main body with a back face and a radiation outcoupling face opposite thereto, a main direction of light guidance parallel to the radiation outcoupling face, at least one plurality of identically shaped and identically oriented outcoupling structures formed on at least one of the main faces, and at least one structure main face per outcoupling structure, wherein 1) an angle-dependent emission characteristic is provided asymmetrically in a first plane parallel to the main direction of light guidance and perpendicular to the radiation outcoupling face, 2) the outcoupling structures are constructed as a raised portion on the radiation outcoupling face, 3) radiation outcoupling proceeds both via the structure main face and via a structure back face, the structure main face is located closer to a radiation entrance face of the main body than the structure back face, and 4) the structure back face is oriented perpendicularly to the main direction of light guidance.