A light emitting device comprising - several 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 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 designed to emit light of a different color, - wherein at least a first 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 , - wherein the second layer sequence comprises at least a lower refractive index layer between two higher refractive index layers , wherein an optical thickness of the different refractive index layers differs from a quarter wavelength at an emission wavelength of the corresponding organic light emitting diode such that outcoupling of light at the emission wavelength is increased, - 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 element mixing the light of said different colors of each group leaving the carrier substrate . - several 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 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 designed to emit light of a different color, - wherein at least a first 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 , - wherein the second layer sequence comprises at least a lower refractive index layer between two higher refractive index layers , wherein an optical thickness of the different refractive index layers differs from a quarter wavelength at an emission wavelength of the corresponding organic light emitting diode such that outcoupling of light at the emission wavelength is increased, - 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 element mixing the light of said different colors of each group leaving the carrier substrate . <EOS>