Driving device of double-display calculating machine

A driving device of a double-display calculating machine, comprising:

• a first display device, including n first common display inputs and m first segment display inputs;
• a second display device, including n second common display inputs and m second segment display inputs;
• and
• a controller, including a plurality of segment signal terminals and a plurality of common signal terminals, the segment signal terminals being commonly connected to the first and second segment display inputs of the first and second display devices, and the common signal terminals being respectively connected to the first common display inputs of the first display device and to the second common display inputs of the second display device, the controller thereby controlling, at the same time, the displays of a calculation entered by an operator and being currently processed and a result thereof respectively on the first and second display devices.