The invention is directed to methods and devices to improve light patterns used to inform or assist an observer or a driver. The invention is related to an illuminating device and to a method for projecting a pre-definable light pattern using the illuminating device of the vehicle into an area surrounding the vehicle. According to the invention, a projection surface is determined in the area surrounding the vehicle, a position of a predefined observer has been determined or provided, and a light unit of the illuminating device is controlled pixel-wise according to the determined projection surface and the determined position of the predefined observer in order to produce the pre-definable light pattern.