Mobile information terminal having operation keys and a display on opposite sides

A mobile information terminal comprising:

• a display device disposed on a display surface;
• a plurality of operation keys disposed on a rear surface located on a reverse side of a front surface which is said display surface to output an input signal;
• a finger position detecting mechanism which detects that a finger of an operator is placed on one of said operation keys to output a position signal by which said one of operation keys is identified, and
• a control section which receives said input signal and said position signal and which controls an operation of said display device,
• wherein said mobile information terminal, in response to said position signal, carries out a predetermined operation that is assigned to said one of operation keys.

A mobile information terminal comprising:

• a display device disposed on a display surface;
• an input device disposed on a rear surface located on a reverse side of a front surface which is said display surface, said input device determining information, which corresponds to a position designated by an operator, according to an operation of said operator, said input device outputting said determined information as an input information signal;
• a finger position detecting mechanism which detects a position of a finger of said operator on said input device to output a position signal by which said detected position is identified;
• and
• a control section which receives said input information signal and said position signal and which controls an operation of said display device,
• wherein said control section executes a display processing operation to change an image on said display device according to said position signal.

A mobile information terminal comprising:

• a display device disposed on a display surface;
• an input device disposed on a rear surface located on a reverse side of a front surface which is said display surface, said input device determining information, which corresponds to a position designated by an operator, according to an operation of said operator, said input device outputting said determined information as an input information signal, said input device comprising a finger position detecting mechanism which detects a position of a finger of said operator to output a position signal by which said detected position is identified;
• and
• a control section which receives said input information signal and said position signal and which controls an operation of said display device,
• wherein said control section executes a display processing operation to change an image on said display device according to said position signal.

A mobile information terminal comprising:

• a display device disposed on a display surface;
• an input device disposed on a rear surface located on a reverse side of a front surface which is said display surface, said input device determining information, which corresponds to a position designated by an operator, according to an operation of said operator, said input device outputting said determined information as an input information signal, said input device comprising a finger position detecting mechanism which detects a position of a finger of said operator to output a position signal by which said detected position is identified;
• and
• a control section which receives said input information signal and said position signal and which controls an operation of said display device,
• wherein said mobile information terminal, in response to said position signal, carries out a predetermined operation.