Display apparatus dividing the display into a plurality of regions and uniform light control method thereof

A control method of a display apparatus comprising a display comprising a plurality of display modules, each display module of the plurality of display modules comprising a pixel driving circuit and at least one pixel comprising a red inorganic light emitting element, a green inorganic light emitting element, and a blue inorganic light emitting element, the control method comprising:

• receiving an image signal having a plurality of grayscales;
• dividing a display region of the display into a plurality of regions, each region of the plurality of regions having a same area and comprising at least one display module among the plurality of display modules;
• calibrating the image signal to output uniform light from each of the plurality of regions;
• and
• controlling the pixel driving circuit to display an image based on the calibrated image signal,
• wherein the calibrating the image signal comprises:
• determining a calibration coefficient for each grayscale corresponding to each of the plurality of display modules based on a reference calibration coefficient corresponding to each of the plurality of display modules;
• and
• calibrating the image signal by applying the determined calibration coefficient to the image signal based on each of the plurality of display modules,
• wherein the reference calibration coefficient comprises a plurality of measurement calibration coefficients obtained based on a measurement of an image displayed on the display for a plurality of reference grayscales among the plurality of grayscales,
• wherein the plurality of reference grayscales comprises at least one first grayscale selected from low grayscales lower than a first value and at least one second grayscale selected from high grayscales higher than a second value, and
• wherein determining the calibration coefficient for each grayscale further comprises determining the determined calibration coefficient based on the reference calibration coefficient corresponding to a reference grayscale having a highest grayscale included in a second grayscale section equal to or higher than the reference grayscale having the highest grayscale.