A display driver integrated circuit includes a frame buffer, a plurality of image processing circuits and an image processing controller. The frame buffer sequentially stores a plurality of frame data received from a host processor. Each of the plurality of frame data includes a plurality of data slices. The image processing circuits perform image signal processing operations, respectively, on ones of the data slices that are included in a respective one of the plurality of frame data and which are sequentially retrieved from the frame buffer. The image processing controller bypasses at least one of the image processing circuits by applying a bypass control signal to the image processing circuits based on a first plurality of data slices included in a first one of the plurality of frame data and a second plurality of data slices included in a second one of the plurality of frame data.