BI-DIRECTIONAL UPDATE OF DISPLAYS IN PORTABLE ELECTRONIC DEVICE

A visual display system is described that optimizes the apparent visual effect of a particular sequence of screen update process. The system includes at least one input device and a display unit. The input device operates to receive instructions from the operator. The display unit has some screen setup at any instant in time. The display unit is capable of modifying the screen setup in response to the instructions from the input device at a particular rate. The modification is made in such a sequence of updates that it gives visual impressions of the updates running at a higher rate than the particular rate.