Organic electroluminescent device and method of driving the same

An electroluminescent device, comprising:

• a plurality of data lines in a first direction;
• a plurality of scan lines in a second direction, the first direction being different from the second direction;
• a plurality of sub-pixels, each sub-pixel including a corresponding data line and a corresponding scan line;
• a scan driver coupled to the plurality of scan lines;
• a controller configured to receive input video data and to determine whether a gray scale level of the input video data is greater than a reference value or less than the reference value;
• and
• a data driver coupled to the plurality of data lines, the data driver comprising:
• a first signal generating circuit configured to drive the device using a first driving method, and
• a second signal generating circuit configured to drive the device using a second driving method, wherein the first driving method is different from the second driving method, wherein the data driver is configured to receive signals from the controller that indicate a gray scale level of the input video data, and wherein the data driver is configured to cause either the first signal generating circuit or the second signal generating circuit to drive the electroluminescent device depending on the gray scale level of the input video data.

A method of driving an electroluminescent device, comprising:

• detecting a gray scale level of input video data;
• generating second video data based on the input video data;
• driving the electroluminescent device using a first driving method when the gray scale level of the input video data is greater than a reference value;
• and
• driving the electroluminescent device using a second driving method when the gray scale level of the input video data is less than the reference value, wherein driving the electroluminescent device using the first driving method includes generating data signals having an amplitude corresponding to the input video data when a dummy bit data included in the generated second video data are first dummy bit data, and wherein driving the electroluminescent device using the second driving method includes generating substantially constant amplitude signals during a period of time that corresponds to the input video data when a dummy bit data included in the generated second video data are second dummy bit data.