Surface lighting element has light guide with two opposite reflecting surfaces into which light from a source passes and is directed by integrated optics to be parallel to the surface

摘要

A surface lighting element (1) comprises a light guide with two opposite reflective surfaces (2,3) and an external light source (5) arranged to pass light coupled through at least one surface onto an integrated optical uncoupling element (4) that converts the light into a stronger beam parallel to the light guide surface.