Pointing device and method and pointer display apparatus and method

A pointer display apparatus using a virtual region, the apparatus comprising:

• a region signal transmitter transmitting at least one signal using at least one signal transmission unit;
• a coordinate ratio receiver receiving from a pointing device ratios of coordinates of a location, which is pointed at by the pointing device, in the virtual region to a size of the virtual region in response to the signals transmitted from the region signal transmitter;
• a coordinate determiner determining coordinates of a pointer in a display region with reference to the ratios;
• and
• a display displaying the pointer at the determined coordinates in the display region.

A pointing method using a virtual region, the method comprising:

• detecting a display region, which displays a pointer, using at least one received signal;
• generating the virtual region corresponding to the display region and having an aspect ratio equal to that of the display region;
• converting coordinates of a location, which is pointed at by a pointing device, in the virtual region into ratios of the coordinates of the location to a size of the virtual region;
• and
• transmitting the ratios.

A pointer display method using a virtual region, the method comprising:

• transmitting at least one signal using at least one signal transmission unit;
• receiving from a pointing device ratios of coordinates of a location, which is pointed at by the pointing device, in the virtual region to a size of the virtual region in response to the signals;
• determining coordinates of a pointer in a display region with reference to the ratios;
• and
• displaying the pointer at the determined coordinates in the display region.