An apparatus for treating pixels or regions of a display panel includes a measuring device configured to measure a parameter of light emitted by one or more pixels of each region of the display panel. The apparatus includes a parameter comparator operably coupled to the measuring device and configured to select one or more pixels or one or more regions of the display panel such that the measured parameter of light emitted by the one or more pixels or the one or more regions exceeds a threshold value. The apparatus also includes a laser device configured to emit a laser beam onto the selected one or more pixels or the selected one or more regions.