Abstract: The present invention relates to the operation of a device having a graphical display operated by hand or using a stylus, characterized in that a graphical interaction is generated on said display analogous to the three-dimensional position of the hand or the stylus as soon as said hand or stylus is located in the immediate vicinity of said display. This concerns a system that supports the operator in manipulating graphical user interfaces in a three-dimensional form, such that an optical reaction takes place on the existing graphical application as soon as the operator approaches, said optical reaction reflecting an analogous function to the position of the finger or the stylus. The user interface reacts at the position where the finger of the user approaches, whereby the image curves, for example, as seen through a sphere. The closer the finger, the stronger is the effect, until finally contact with the surface executes the prescribed action.

Abstract: The present invention relates to a shaft encoder device, comprising magnetic sensor means designed to detect the magnetic field of a magnetic field generating means stationary with respect to the shaft, a light source, optical sensor means designed to detect light emitted from the light source and reflected or transmitted by an encoder disk stationary with respect to the shaft, and signal processing means designed to receive first data from the magnetic sensor means and second data from the optical sensor means, and to determine an angle of rotation of the shaft from the received first data and/or to determine the angle of rotation of the shaft from the received second data.