Input method and system using optical pointer for electronic device

An input system for an electronic device, the system comprising:

• an optical pointer configured to transmit light signals;
• and
• a device configured to detect at least one of a pattern, a pattern direction, and a pattern movement corresponding to the light signals transmitted from the optical pointer, configured to reference a function table providing a mapping between a function of the device and pattern information associated with the at least one of the pattern, the pattern direction, and the pattern movement, and configured to execute or control the function according to the pattern information and the function table.