Display device, and method of operating a display device

A display device, comprising:

• a display panel including first through N-th pixel rows, where N is an integer greater than 1;
• and
• a panel driver configured to sequentially receive first through N-th line data for the first through the N-th pixel rows in each frame period, and to drive the display panel based on the first through the N-th line data, the panel driver including:
• a current control circuit configured to determine an average panel luminance level based on the first through K-th line data for the first through K-th pixel rows received in a current frame period and (K+1)-th through the N-th line data for (K+1)-th through the N-th pixel rows received in a previous frame period, and to determine a scale factor for the (K+1)-th pixel row based on the average panel luminance level, where K is an integer greater than 0 and less than or equal to N;
• and
• a data correction circuit configured to correct the (K+1)-th line data for the (K+1)-th pixel row based on the scale factor in the current frame period,
• wherein the scale factor is determined when the K-th line data for the K-th pixel row among the first through N-th pixel rows are received in the current frame period.

A display device, comprising:

• a display panel including a plurality of pixel rows arranged in sequence;
• and
• a panel driver configured to sequentially receive a plurality of line data for the pixel rows in each frame period, and to drive the display panel based on the line data, the panel driver including:
• a current control circuit configured to determine a current control value for a specific pixel row based on line data received for the pixel rows arranged before the specific pixel row in a current frame period, line data received for the specific pixel row in a previous frame period and line data received for pixel rows arranged after the specific pixel row in the previous frame period;
• and
• a data correction circuit configured to correct the line data for the specific pixel row based on the current control value in the current frame period,
• wherein the current control circuit includes:
• a gray-luminance converter configured to convert gray levels represented by pixel data included in first through N-th line data of the plurality of line data for first through N-th pixel rows of the pixel rows into pixel luminances for each of the first through the N-th pixel rows, where N is an integer greater than 1;
• a line luminance calculator configured to calculate a line luminance for each of the first through the N-th pixel rows by summing the pixel luminances for each of the first through the N-th pixel rows;
• an average luminance level determiner configured to store line luminances for the first through the N-th pixel rows in a first-in first-out (FIFO) manner, and to determine an average panel luminance level based on the line luminances for the first through the N-th pixel rows;
• a luminance domain scale factor determiner configured to determine a luminance domain scale factor corresponding to the average panel luminance level;
• and
• a gray domain scale factor determiner configured to convert the luminance domain scale factor into a gray domain scale factor as the current control value.