Voltage drop compensation system of display panel, and display driving device for compensating for voltage drop of display panel

A voltage drop compensation system of a display panel, comprising:

• an image receiver dividing a test image of a panel into a plurality of regions;
• a luminance value generator generating a detected luminance value of each of the plurality of regions;
• and
• a voltage drop compensation value generator generating a voltage drop compensation value of a region in which a voltage drop has occurred among the plurality of regions, by comparing the detected luminance value and a preset target luminance value,
• wherein the preset target luminance value is a luminance value of a region which is selected as a target region among the plurality of regions,
• wherein the voltage drop compensation value is a difference value between the detected luminance value and the preset target luminance value,
• wherein the image receiver receives the test image of the panel corresponding to a plurality of grayscales and a plurality of DBVs, and outputs an image signal and position information for each of the plurality of regions into which the test image is divided, and
• wherein the voltage drop compensation value generator receives the detected luminance value and the position information, sets the target luminance value of the test image corresponding to the plurality of grayscales and the plurality of DBVs, and generates the voltage drop compensation value by comparing the target luminance value and the detected luminance value for each region of the test image corresponding to the plurality of grayscales and the plurality of DBVs.