Coupling compensator for display panel and display device including the same

A display device comprising:

• a display panel including a plurality of data lines, a plurality of scan lines, and a plurality of pixels formed in intersection regions of the data lines and the scan lines;
• a coupling compensator configured to i) calculate a line coupling voltage on each of the data lines based on the difference between first grayscale data provided to a first group of the pixels in an (N−1)th row and second grayscale data provided to a second group of the pixels in an Nth row and ii) generate the compensating grayscale data configured to compensate the line coupling voltage, where the N is an integer equal to or greater than 2;
• a data driver configured to convert the compensating grayscale data to a data signal and provide the data signal to all the pixels via the data lines;
• a scan driver configured to provide a scan signal to all the pixels via the scan lines;
• and
• a timing controller configured to control the coupling compensator, the data driver, and the scan driver.

A display device comprising:

• a display panel including a plurality of data lines, a plurality of scan lines, and a plurality of pixels formed in intersection regions of the data lines and the scan lines;
• a coupling compensator configured to calculate a line coupling voltage for each of the data lines corresponding to an amount of coupling generated via a parasitic capacitor formed between each pixel and the corresponding data line, wherein the coupling compensator includes:
• a first data converter configured to receive gray scale data corresponding to each pixel and convert the gray scale data into a grayscale data voltage;
• a coupling voltage calculator configured to receive the grayscale data voltage and calculate the line coupling voltage based on the grayscale data voltage;
• a compensation data generator configured to receive the line coupling voltage from the coupling voltage calculator and the grayscale data voltage from the first data converter, and generate a compensating data voltage based on the line coupling voltage and the grayscale data voltage;
• and
• a second data converter configured to receive the compensating data voltage and convert the compensating data voltage to compensating grayscale data;
• a data driver configured to convert the compensating grayscale data to a data signal and provide the data signal to the pixels via the data lines;
• a scan driver configured to provide a scan signal to the pixels via the scan lines;
• and
• a timing controller configured to control the coupling compensator, the data driver, and the scan driver.