Organic light emitting diode display device and display system including the same

A display system comprising:

• an application processor configured to generate image data and a control signal;
• an organic light emitting diode (OLED) display device configured to display the image data in response to the control signal;
• and
• a power supply comprising a battery configured to provide a power supply voltage to the OLED display device and a battery sensing module configured to detect a power of the battery,
• wherein the OLED display device comprises:
• a display panel comprising a plurality of pixel rows;
• a driving circuit configured to:
• provide a first display data to the plurality of pixel rows in a normal mode;
• provide a second display data including black data to the plurality of pixel rows in a dimming mode, in response to a mode signal;
• and
• a data converter configured to:
• convert input image data to the first display data or the second display data in response to the mode signal, wherein the data converter comprises a switch configured to receive the input image data, a first processing logic configured to convert the input image data to the first display data, and a second processing logic configured to convert the input image data to the second display data comprising the black data, the black data assigning a portion of pixels of the display panel to not emit light, the data converter being configured to control a path of the input image data through the switch to the first processing logic or the second processing logic and output the first display data or the second display data from the first processing logic or the second processing logic, respectively, to the driving circuit;
• and
• reduce a second luminance of the display panel in the dimming mode to a lower level than a first luminance of the display panel in the normal mode, the mode signal being based on a battery sensing signal that the battery sensing module generates based on the power of the battery.