Abstract: A device and a method guide light in an augmented-reality system, whereby a recorder unit, with an optical axis, records a real object and displays the same on a display unit. A data processing unit generates a virtual object and also displays the same on the display unit. Based on a known sensor positioning, a sensor alignment, a sensor directional diagram and a provided sensor output signal from at least two light-sensitive sensors, an illumination angle is then determined and the light guidance for the virtual object carried out in the display unit, based on said illumination angle.

Abstract: An apparatus and method is disclosed for protecting a mobile telephone against an unintentional switch-on wherein a pressure produced on a key is stored and evaluated, along with a substantially simultaneous pressure on one or several other keys. The mobile telephone being switched into a operating mode only when the pressure is applied on one key.