KEY INPUT DEVICE

PURPOSE:To control display or the like by relating an input key to a color liquid crystal display means and to reduce misinputs by setting up respective adjacent input keys in an input device to different colors. CONSTITUTION:When a power supply is turned on, a main CPU 22 controls a panel control means 23 in accordance with a program previously stored in a ROM and reads out successively prescribed colors (c1-cn) of respective keys (a-s) stored in a key table 24, respective key positions are selected by horizontal and vertical position control means 25, 26 and respective keys on an input panel 2 are driven and controlled by a color control mean 27 through a driving circuit 28. Prescribed colors are displayed on respective keys and the input panel 2 is set up to an operation enable state. When a prescribed key on the panel 2 is depressed, the depressed key position is detected by a position detecting means 30 and its key signal is inputted to the means 23. The means 23 refers the key table 24 and transfers a prescribed function code F1 to the main CPU 22 to execute prescribed processing.