DISPLAY DEVICE FOR OPERATION KEY

摘要

PURPOSE:To improve the operability and to attain the reduction of cost for a display device for operation keys by securing such a constitution where an operation picture can be displayed within a range that prevents no visual recognition of a primary picture and an operating part is displayed again just with a touch of a switch. CONSTITUTION:In case no input of a key signal (b) is recognized even though a fixed time passed after the superposed display of a primary picture and an operating picture no operation of a touch switch 1 is judged and only the primary picture is displayed together with erasion of the operating picture. When the switch 1 is operated during erasion of the operating picture, the operating picture is displayed again to secure an operation enable state. In such a way, the operating picture can be displayed on a display 2 only when it is desired and therefore the operability of a display device for operation keys is improved together with reduction of the cost.