An organic light emitting diode display device includes a lower substrate, a plurality of lower electrodes, a light emitting layer, an upper electrode, and a first functional module. The lower substrate includes a first module region that includes sub-pixel regions and transmissive regions, and a display region that surrounds the first module region and includes the sub-pixel regions. The lower electrodes are respectively disposed on the lower substrate in the sub-pixel regions in the first module region. The light emitting layer is disposed on the lower electrodes, and includes a first opening between two adjacent lower electrodes. The upper electrode is disposed on the light emitting layer, and includes a second opening that overlaps the first opening. The first functional module is disposed on a bottom surface of the lower substrate in the first module region.