Display driver integrated circuit

A display driver integrated circuit comprising:

• a source driver configured to receive a power voltage from a power management integrated circuit;
• and
• a logic circuit configured to receive display data from an application processor, to perform an analysis on the display data, and to control a voltage level of the power management integrated circuit based on the analysis,
• wherein the logic circuit is configured to set the voltage level of the power management integrated circuit to one of at least three different voltages by comparing the analysis with a first reference value and a second reference value,
• wherein the display data comprises image data in units of frames,
• the image data in units of frames comprises a plurality of horizontal lines,
• each of the plurality of horizontal lines includes a plurality of pixel bits, and
• the logic circuit is configured to control the power management integrated circuit by comparing each pixel bit of a first horizontal line with each pixel bit of a second horizontal line adjacent to the first horizontal line, summing compared results, and controlling the voltage level of the power voltage based on a summed result,
• wherein the first horizontal line and the second horizontal line extend a length of the image data.