Display device and driving apparatus and method thereof

A method of driving a display device including a look-up table, the method comprising:

• receiving input image data having input grays;
• calculating a modified gray by time-averaging the transmittance of the input grays based on a ratio of a frame frequency of the input image data and a frame frequency of the output image data;
• reading out a plurality of output grays corresponding to the modified gray from the look-up table;
• and
• outputting a plurality of output image data having the output grays,
• wherein the frame frequency of the output image data is greater than the frame frequency of the input image data and smaller than twice the frame frequency of the input image data.

A display device comprising:

• a plurality of pixels including switching elements;
• a plurality of gate lines transmitting gate signals to the switching elements;
• a plurality of data lines connected to the switching elements;
• a signal controller that selects a plurality of output grays based on input grays of input image data and outputs a plurality of output image data having the output grays;
• and
• a data driver that applies data voltages corresponding to at least a portion of the output image data included in the plurality of output image data supplied from the signal controller to the switching elements through the data lines sequentially during a predetermined time,
• wherein the output grays corresponding to an input gray are selected from at least one set of grays giving an average front transmittance substantially equal to a front transmittance of the input gray and the output grays generate the closest one of the average lateral gamma curves generated by at least one set of grays relative to a front gamma curve generated by the input grays, and
• wherein the average front transmittance is a time-averaged front transmittance over the predetermined time,
• the data processor calculates a time-averaged transmittance by time-averaging the transmittance of the input image data based on a ratio of a frame frequency of the input image data and a frame frequency of the output image data, finds modified grays corresponding to the time-averaged transmittance, and obtains the output grays based on the modified grays, and
• the frame frequency of the output image data is greater than the frame frequency of the input image data and smaller than twice the frame frequency of the input image data.