Display device including a controller and electronic device including the same

An electronic device comprising:

• a processor generating input image data and a control signal;
• and
• a display device displaying an image based on the input image data and the control signal,
• wherein the display device includes:
• a display panel including a plurality of sub-pixels and divided into a plurality of zones;
• a voltage generator applying a first power source voltage having a voltage level corresponding to each of the plurality of zones through a plurality of power source channels;
• and
• a controller controlling the display panel and the voltage generator based on the input image data and the control signal, and outputting, to the voltage generator, a code value that determines the voltage level of the first power source voltage applied by the voltage generator,
• wherein the controller includes an update unit that updates a code value of a target zone based on a difference between an adjacent code value and the code value of the target zone, and
• wherein the adjacent code value is a code value of a zone proximate to the target zone.

A display device comprising:

• a display panel including a plurality of sub-pixels and divided into a plurality of zones including a target zone and a plurality of adjacent zones;
• a voltage generator applying a first power source voltage having a voltage level corresponding to each of the plurality of zones through a plurality of power source channels;
• and
• a controller includes a calculator calculating a plurality of code values of the plurality of zones, a memory storing the plurality of code values, and an update unit that updates a code value of a first target zone based on a difference between a first adjacent code value and the code value of the first target zone and a reference value,
• wherein the first adjacent code value is a code value of a zone proximate to the first target zone among the plurality of zones,
• wherein the controller outputs, to the voltage generator, the plurality of code values, including the code value updated for the first target zone, that determine the voltage level of the first power source voltage applied by the voltage generator, and
• wherein the code value updated for the first target zone reduces a difference in luminance between pixels of the first target zone and pixels of a first adjacent zone corresponding to the first adjacent code value.