Driving device and display apparatus having the same

An LCD device comprising:

• a timing controller that receives input image data and sequentially outputs first and second compensated image data;
• a gamma reference voltage generator that outputs a gamma reference voltage;
• a data driver that converts the first compensated image data to output a first data voltage during a first period, and converts the second compensated image data to output a second data voltage during a second period based on the gamma reference voltage;
• a gate driver that outputs a first gate signal during the first period and a second gate signal during the second period;
• and
• a display unit that includes a plurality of pixels, wherein a pixel of the pixels has a first sub-pixel receiving the first gate signal and the first data voltage and a second sub-pixel receiving the second gate signal and the second data voltage so as to display an image,
• wherein the timing controller comprises:
• a converter that receives the input image data and converts the input image data to output first sub-image data having a gray scale higher than a gray scale of the input image data and second sub-image data having a gray scale lower than the gray scale of the input image data;
• a first memory that sequentially stores the first sub-image data supplied from the converter in one frame unit;
• a second memory that sequentially stores the second sub-image data supplied from the converter in one frame unit;
• a first compensator that receives first sub-image data of a present frame (first present sub-image data) from the converter, reads out first sub-image data of a previous frame (first previous sub-image data) from the first memory and compensates for the first present sub-image data based on a first differential value between the first previous sub-image data and the first present sub-image data to output the first compensated image data, a gray scale of the first present sub-image data being higher than a gray scale of present input image data, the present input image data being converted by the converter to generate the first present sub-image data;
• a second compensator that receives second sub-image data of a present frame (second present sub-image data) from the converter, reads out second sub-image data of the previous frame (second previous sub-image data) from the second memory and compensates for the second present sub-image data based on a second differential value between the second previous sub-image data and the second present sub-image data to output the second compensated image data, a gray scale of the second present sub-image data being lower than the gray scale of the present input image data, the present input image data being converted by the converter to generate the second present sub-image data;
• and
• an output circuit that controls an output time of the first and second compensated image data.