Display device and operation method of display device

A display device comprising:

• a display divided into a plurality of blocks and configured to be driven;
• memory storing at least one instruction;
• and
• at least one processor, comprising processing circuitry, individually and/or collectively, configured to execute the at least one instruction stored in the memory,
• wherein at least one processor is configured to execute the at least one instruction to cause the display device to:
• obtain an input image;
• calculate a plurality of duty ratios at which the plurality of blocks are respectively driven within one frame, based on the obtained input image,
• calculate a first duty margin using a specified first target duty ratio and a first reference duty ratio selected from among the plurality of calculated duty ratios,
• calculate a second duty margin using a second target duty ratio determined by a specified relational expression between a driving current and a driving duty ratio of the display and a second reference duty ratio determined based on the plurality of calculated duty ratios,
• determine a correcting duty margin by comparing the first duty margin with the second duty margin, and
• drive the display with a plurality of final duty ratios determined using the plurality of duty ratios and the correcting duty margin, and a final driving current determined to correspond to the plurality of final duty ratios using the relational expression.