Patent ID: 7107079

Claim:
A cellular phone set having a plurality of operation keys and one display device on a panel surface, comprising: first control means for detecting a state wherein a finger touches at least one of said plurality of operation keys and controlling display of said cellular phone set in a first state on the basis of the detected state, said first control means instructs a screen display section to display a function explanation corresponding to each touched operation key; second control means for detecting a state wherein the finger is moved away from the key and controlling display of said cellular phone set in a second state on the basis of the detected state; third control means for detecting a state wherein the key is pressed after the finger touched the key and controlling display of said cellular phone set in a third state on the basis of the detected state, in the third state, said third control means instructs a screen display section to stop displaying all currently displayed function explanations and updates a display state by displaying only the function explanation that corresponds to the touched key; and fourth control means for detecting a state wherein the finger is moved away from the key after the key was pressed and controlling display of said cellular phone set in a fourth state on the basis of the detected state.