An organic light emitting diode (OLED) display includes a transmission region and a reflection region. When external light is incident on the OLED display, a reflection rate of the external light of the reflection region is proportional to luminance of the transmission region. The transmission region includes a pixel electrode, an organic emission layer, and a common electrode. The transmission region is configured to transmit light emitted from the organic emission layer to a first direction. The reflection region includes a control electrode, liquid crystal capsules, and the common electrode. The reflection region is configured to reflect the external light to the first direction.