Patent ID: 7505031

Claim:
A monitor display control apparatus, which inputs a screen control signal to a monitor component, displays a map image at a predetermined scale factor on a display screen of the monitor component, displays a cursor on a center of the display screen, and relatively moves the map image with respect to the cursor, the monitor display control apparatus comprising: a manual operation component, which can be manually displaced from a reference position; a position detecting component, which detects a position of the operation component; a signal output component, which outputs an operation signal including information on an amount of displacement of the operation component from the reference position on the basis of a detected result at the position detecting component; and a display control component, which sets a predetermined relative moving speed of the map image and a predetermined scale factor of the map image on the basis of the information on the amount of displacement of the operation component included in the operation signal and outputs the screen control signal corresponding to the relative moving speed and the scale factor which have been set, wherein, when the amount of manual displacement of the operation component is less than a predetermined distance from said reference direction, the display control component varies the relative moving speed of the map image to a predetermined relative moving speed in accordance with the amount of displacement of the operation component and sets the scale factor of the map image to the predetermined scale factor, and when the amount of manual displacement of the operation component is equal to or greater than the predetermined distance, the display control component sets the relative moving speed of the map image to a speed at the time when the amount of displacement of the operation component reaches the predetermined amount, and varies the scale factor of the map image in accordance with the amount of additional displacement of the operation component beyond said predetermined distance such that the relative moving speed of the map image does not increase with the amount of additional displacement of the operation component beyond said predetermined distance, but the scale factor of the map does increase with the amount of additional displacement of the operation component beyond said predetermined distance.