Patent ID: 8718462

Claim:
A control unit for generating a control signal comprising: a base part ( 12 ); a control element ( 18 ) rotatable about an axis of rotation relative to the base part ( 12 ); a position encoder ( 52 ) for detecting an angular position or a change in angular position of the control element ( 18 ) relative to the base part ( 12 ); a control device ( 50 ) which is adapted to generate the control signal in dependence on the detected angular position or change in angular position of the control element ( 18 ); and an electronic display device ( 16 ), wherein the control device ( 50 ) is adapted to control the electronic display device ( 16 ) for showing at least one symbol arrangement, wherein the electronic display device ( 16 ) has the shape of a cylinder or of a cylinder sector whose axis coincides with the axis of rotation of the control element ( 18 ) or runs in parallel hereto, wherein said electronic display device is rotatable relative to at least one of said base part and said control element.