1. A display device, comprising: a display panel; and a display panel driver driving the display panel, wherein the display panel driver includes: a correction circuit which performs correction calculations on input image data to generate saturation-enhanced output image data; a drive circuitry driving the display panel in response to the output image data; and a starting point control circuit, wherein the correction circuit generates red (R) data of the output image data by performing a first correction calculation on R data of the input image data, generates green (G) data of the output image data by performing a second correction calculation on G data of the input image data, and generates blue (B) data of the output image data by performing a third correction calculation on B data of the input image data, wherein the starting point control circuit controls a position of a starting point of a first input-output curve corresponding to an input-output relation of the first correction calculation; a position of a starting point of a second input-output curve corresponding to an input-output relation of the second correction calculation; and a position of a starting point of a third input-output curve corresponding to an input-output relation of the third correction calculation, wherein the starting points for the input-output curves each represent an output image data value for an allowed minimum value of a predefined range of values for corresponding input image data, and wherein the starting point control circuit calculates a luminance value of a certain pixel from the input image data associated with the certain pixel in the correction calculations of the input image data associated with the certain pixel, controls the position of the starting point of the first input-output curve in response to a first difference between a value of the R data of the input image data associated with the certain pixel and the luminance value of the certain pixel, controls the position of the starting point of the second input-output curve in response to a second difference between a value of the G data of the input image data associated with the certain pixel and the luminance value of the certain pixel, and controls the position of the starting point of the third input-output curve in response to a third difference between a value of the B data of the input image data associated with the certain pixel and the luminance value of the certain pixel.