Patent ID: 8729574

Claim:
A light emitting device comprising a plurality of groups of stripe shaped organic light emitting diodes arranged side by side on an optically transparent carrier substrate, said organic light emitting diodes comprising a first layer sequence including at least an organic layer or layer stack between a first electrode layer and a second electrode layer, said first and said second electrode layers forming a first microcavity, said second electrode layer being closer to the carrier substrate than the first electrode layer, at least two of the organic light emitting diodes of each group being configured to emit light of a different color, wherein at least one of the organic light emitting diodes of each group comprises a second layer sequence forming a second microcavity between the second electrode layer and the carrier substrate, the second microcavity being adapted in thickness of at least one of its layers to increase light output of the corresponding organic light emitting diode, and wherein a scatter or diffuser element is arranged in an emission direction of the organic light emitting diodes in front of the carrier substrate, said scatter or diffuser element mixing the light of said different colors of each group leaving the carrier substrate.