LIGHT SOURCE

摘要

The invention relates to a light source (1) with a light generating unit (2) like an organic light emitting diode and an outcoupling device (6) for coupling light out of the light generating unit. The outcoupling device comprises a first layer (3) with an outcoupling structure facing the light generating unit, a second layer (4) having a refractive index being smaller than the refractive index of the first layer, and a third layer (5) having a refractive index being similar to the refractive index of the second layer. The combination of the first layer with the outcoupling structure and the additional third layer leads to an increased outcoupling efficiency of the light generated by the light generating unit into surrounding air.