DISPLAY DEVICE HAVING TOUCH PANEL

PURPOSE:To avoid the fatigue deterioration of a specific panel by shifting totally the position of an input key train on a touch panel every prescribed touch executing frequency and therefore avoiding the concentration of the stress applied to the touch panel into a specific area. CONSTITUTION:Two types of touch panel key position modes 7a and 7b, for example, are prepared as shown by (A) in the figures. These two modes are switched to each other for each fixed transaction so that the parts receiving the stresses are different as shown by 9 and 10. In other words, the pushing frequency of an input key 6 is counted by a menu position coordinate converting part 5. Then the position of a touch panel input key is moved on a touch panel 2 when said key touch frequency reaches a fixed level.