A display device (100, 300, 400), comprising: a first pixel configured to emit a first color light; a second pixel configured to emit a second color light; a third pixel configured to emit a third color light; a first organic light emitting diode which is disposed in the first pixel and configured to emit the third color light; a second organic light emitting diode which is disposed in the second pixel and configured to emit the third color light; a third organic light emitting diode which is disposed in the third pixel and configured to emit the third color light; a first color-conversion layer disposed over the first organic light emitting diode in the first pixel; a second color-conversion layer disposed over the second organic light emitting diode in the second pixel; a first color filter disposed on the first color-conversion layer in the first pixel and configured to transmit the first color light; a second color filter disposed on the second color-conversion layer in the second pixel and configured to transmit the second color light; a third color filter disposed over the third organic light emitting diode in the third pixel and configured to transmit the third color light; a light scattering layer disposed between the third organic light emitting diode and the third color filter in only the third pixel, a first auxiliary color filter disposed between the first color-conversion layer and the first organic light emitting diode in the first pixel and configured to transmit only the third color light generated by the first organic light emitting diode; and a second auxiliary color filter disposed between the second color-conversion layer and the second organic light emitting diode in the second pixel and configured to transmit only the third color light generated by the second organic light emitting diode, wherein the first color light and the second color light have a longer wavelength than the third color light, wherein a lateral surface of the light scattering layer is in contact with a lateral surface of a black matrix, wherein a top surface of the light scattering layer is in contact with the third color filter, wherein bottom surfaces of the light scattering layer, the first auxiliary color filter, the second auxiliary color filter, and the black matrix are in contact with an encapsulation layer, wherein lateral surfaces of the first and second color-conversion layers (151, 152) are in contact with the lateral surface of the black matrix, wherein lateral surfaces of the first and second auxiliary color filters (371, 372) are in contact with the lateral surface of the black matrix and wherein lateral surfaces of the first, second and third color filters (481, 482, 483) are in contact with the lateral surface of the black matrix. a first pixel configured to emit a first color light; a second pixel configured to emit a second color light; a third pixel configured to emit a third color light; a first organic light emitting diode which is disposed in the first pixel and configured to emit the third color light; a second organic light emitting diode which is disposed in the second pixel and configured to emit the third color light; a third organic light emitting diode which is disposed in the third pixel and configured to emit the third color light; a first color-conversion layer disposed over the first organic light emitting diode in the first pixel; a second color-conversion layer disposed over the second organic light emitting diode in the second pixel; a first color filter disposed on the first color-conversion layer in the first pixel and configured to transmit the first color light; a second color filter disposed on the second color-conversion layer in the second pixel and configured to transmit the second color light; a third color filter disposed over the third organic light emitting diode in the third pixel and configured to transmit the third color light; a light scattering layer disposed between the third organic light emitting diode and the third color filter in only the third pixel, a first auxiliary color filter disposed between the first color-conversion layer and the first organic light emitting diode in the first pixel and configured to transmit only the third color light generated by the first organic light emitting diode; and a second auxiliary color filter disposed between the second color-conversion layer and the second organic light emitting diode in the second pixel and configured to transmit only the third color light generated by the second organic light emitting diode, wherein the first color light and the second color light have a longer wavelength than the third color light, wherein a lateral surface of the light scattering layer is in contact with a lateral surface of a black matrix, wherein a top surface of the light scattering layer is in contact with the third color filter, wherein bottom surfaces of the light scattering layer, the first auxiliary color filter, the second auxiliary color filter, and the black matrix are in contact with an encapsulation layer, wherein lateral surfaces of the first and second color-conversion layers (151, 152) are in contact with the lateral surface of the black matrix, wherein lateral surfaces of the first and second auxiliary color filters (371, 372) are in contact with the lateral surface of the black matrix and wherein lateral surfaces of the first, second and third color filters (481, 482, 483) are in contact with the lateral surface of the black matrix.