Image display apparatus capable of improving sharpness of an edge area

An image display apparatus comprising:

• a panel including a first pixel, a second pixel, a third pixel, and a fourth pixel, wherein each of the first pixel to the fourth pixel has a different combination of three sub-pixels among four possible subpixels of different colors, wherein the first to the fourth pixel are arranged side by side in a horizontal direction, and wherein the first pixel is disposed adjacent to a left side of the second pixel, the third pixel is disposed adjacent to a right side of the second pixel, and the fourth pixel is disposed adjacent to a right side of the third pixel;
• a controller which generates subpixel data corresponding to the subpixels of the second pixel using input subpixel data corresponding to the subpixels of the first pixel and input subpixel data corresponding to the subpixels of the third pixel, wherein, when a luminance level of the second pixel is lower than or equal to a first reference level and a difference in luminance between the first pixel and the second pixel or between the second pixel and the third pixel is greater than or equal to a second reference level, the controller generates subpixel data corresponding to the subpixels of the second pixel without using input subpixel data corresponding to the subpixels of the first pixel or input subpixel data corresponding to the subpixels of the third pixel.