There is an electrical / electronic device for forming color images in large systems having multiple on at least one printed circuit board proposed existing LED arrays, wherein for generating saturated colors as possible at the time of color display the effects of corrections to the non-participating primary colors (RGB) so are low as possible while maintaining the greatest possible uniformity of light emitted from the array light colored impression. For this purpose, an algorithm in the microprocessor of the correction unit is implemented to control the colored light impression, through which depending on the composition of the currently displayed color light impression from the proportions of the three primary colors (RGB), red, green and blue, a weighting of the correction data is performed in such a way so that individual ones of the three primary colors (RGB) representing the LED elements of the LED arrays in accordance with the algorithm with the corrections are applied.