A light emitting device comprising - several groups of stripe shaped organic light emitting diodes (15, 16, 17) arranged side by side on an optically transparent carrier substrate, - said organic light emitting diodes (15, 16, 17) 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 (5, 11) 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 (15, 16, 17) of each group being designed to emit light of a different color, - wherein at least a first of the organic light emitting diodes (15, 16, 17) 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 (15, 16, 17), - 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 (15, 16, 17) 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 (15, 16, 17) 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 (15, 16, 17) arranged side by side on an optically transparent carrier substrate, - said organic light emitting diodes (15, 16, 17) 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 (5, 11) 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 (15, 16, 17) of each group being designed to emit light of a different color, - wherein at least a first of the organic light emitting diodes (15, 16, 17) 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 (15, 16, 17), - 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 (15, 16, 17) 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 (15, 16, 17) in front of the carrier substrate, said element mixing the light of said different colors of each group leaving the carrier substrate.