Display device and related operating method involving dimming control

A display device, comprising:

• a display panel including a plurality of pixels;
• a dimming controller configured to generate a temporary voltage set by performing a first interpolating operation using a (j)th band voltage set and a (j+1)th band voltage set among first through (i)th band voltage sets corresponding to first through (i)th dimming bands, respectively, and configured to generate a grayscale gamma voltage set corresponding to target luminance by performing a second interpolating operation using the temporary voltage set and the (j)th band voltage set, wherein the i is an integer greater than 1, wherein the j is an integer greater than or equal to 1 and smaller than the i, wherein the second interpolating operation results in first through (p)th interpolated voltage sets, wherein the p is an integer, and wherein the grayscale gamma voltage set is one of the first through (p)th interpolated voltage sets or the temporary voltage set;
• and
• a panel driver configured to drive the display panel by converting image data into a data signal based on the grayscale gamma voltage set and by providing the data signal to the pixels.