Display device and driving method thereof

A display device comprising:

• a display panel a plurality of pixels arranged in rows, a plurality of data lines, and a plurality of gate lines;
• a data driver configured to apply a plurality of data voltages to the data lines;
• a gate driver configured to apply a plurality of gate signals to the gate lines;
• and
• a signal controller including a signal processor, wherein the signal controller is configured to control the data driver and the gate driver,
• wherein the signal processor includes:
• a memory:
• i) an input image signal of the (N−1)-th row and ii) an input image signal of the N-th row, wherein N is a natural number of 2 or more;
• and
• a coupling index calculator configured to calculate a coupling index which represents a degree of coupling between adjacent rows, and
• wherein the signal processor is configured to compensate for the input image signal of a pixel of the N-th row to generate a compensated image signal based at least in part on:
• i) an input image signal of the (N+1), the input image signal of the (N−1)-th row, iii) the input image signal of the N-th row, and iv) the calculated coupling index, and
• wherein the signal processor further includes:
• a gray-to-voltage (GV) converter configured to convert into voltages:
• i) the input image signal of the (N−1)-th row, ii) the input image signal of the N-th row, and iii) the input image signal of the (N+1)-th row;
• a compensation voltage generator configured to:
• i) receive the converted voltages from the GV converter, ii) receive the coupling index from the coupling index calculator, and iii) generate a compensation voltage based at least in part on the converted voltages and the coupling index;
• and
• a voltage-to-gray (VG) converter configured to:
• i) receive the compensation voltage and ii) convert the compensation voltage into a gray value.

A method of driving a display device including pixels arranged in rows, comprising:

• storing an input image signal of the (N−1)-th row and an input image signal of the N-th row, wherein N is a natural number of 2 or more;
• calculating a coupling index which represents a degree of coupling between adjacent rows;
• and
• compensating for the input image signal of a pixel of the N-th row to generate a compensated image signal based at least in part on:
• i) an input image signal of the (N+1)-th row, ii) the input image signal of the (N−1)-th row, and iii) the input image signal of the N-th row, and iv) the calculated coupling index,
• wherein the display device further includes a data driver and a gate driver, and
• wherein the calculating is performed based at least in part on the distance from the data driver to the pixel and the distance from the gate driver to the pixel.

A method of driving a display device including pixels arranged in rows, comprising:

• storing an input image signal of the (N−1)-th row and an input image signal of the N-th row, wherein N is a natural number of 2 or more;
• calculating a coupling index which represents a degree of coupling between adjacent rows;
• and
• compensating for the input image signal of a pixel of the N-th row to generate a compensated image signal based at least in part on:
• i) an input image signal of the (N+1)-th row, ii) the input image signal of the (N−1)-th row, and iii) the input image signal of the N-th row, and iv) the calculated coupling index,
• wherein the compensating includes:
• converting into voltages:
• i) the input image signal of the (N−1)-th row, ii) the input image signal of the N-th row, and iii) the input image signal of the (N+1)-th row;
• generating a compensation voltage based at least in part on the converted voltages and the coupling index;
• and
• converting the compensation voltage into a gray.