Driving Circuit and Display Device Using the Same

A display device comprising:

• a display panel including a plurality of pixels and being operated by frames, the frames including at least one refresh frame, a period of the at least one refresh frame varies based on a refresh rate;
• a scan driver configured to supply a scan signal, the scan driver arranged at one side or both sides of the display panel;
• and
• a light emission signal driver configured to supply a light emission signal, the light emission signal driver arranged at another side of the display panel;
• wherein each of the plurality of pixels comprises:
• an electroluminescent device;
• a driving transistor configured to drive the electroluminescent device;
• and
• a NMOS switching transistor diode-connected to the driving transistor,
• wherein the light emission signal driver is configured to change a duty ratio of the light emission signal at a time point of a change of the refresh rate,
• wherein the refresh rate is changed at the time point, a first bias voltage is supplied, and
• wherein the refresh rate includes at least one refresh frame and at least two hold frames that follow the at least one refresh frame.