US Patent 7305631 Integrated motion sensor for a data processing device

A data processing device is described comprising: a base; a first motion sensor fixedly coupled to the base to detect movement of the data processing device across a surface in direct contact with the base, the motion sensor to generate a first set of motion signals indicating a direction of the movement of the data processing device; and a display controller to generate graphical images on a display and to move one or more graphical images in a particular direction on the display based on the first set of motion signals.