An illumination device that can reduce variations in brightness is provided. A plurality of elements of a sequence is determined based on operation of an input device. In order to attach a stylus to a stylus holder, the longitudinal direction of the stylus body is set in a direction orthogonal to the central axis of a shaft body of the stylus holder, and the seating plate is moved in the direction orthogonal to the central axis of the shaft body. The disclosure provides for producing a warning signal to the user when sensed signals are positive, and for producing a sleep signal to protect the display from thermal damage. In still another embodiment, when the PIN is entered, the call is presented with a distinctive ring at the called communication station. The invention furthermore relates to a method for combating undesirable microorganisms by application of the compounds according to the invention to the microorganisms andor to the habitat thereof.