Digitizer with high accuracy of identifying position

A digitizer with high accuracy of identifying a position, in which a plurality of magnetic force sensors are installed to collect a plurality of pieces of position information regarding a magnetic force pen, and a position of the magnetic force pen is determined by using only position information selected according to predetermined selection reference among the plurality of pieces of collected position information, the digitizer comprising:

• a touchscreen configured to display an image;
• a magnetic force pen configured to move at an upper side of a front surface of the touchscreen, while a magnetic material generates a three-dimensional (3D) magnetic field distribution;
• a plurality of magnetic force sensors installed inside a case and configured to measure a direction and a magnitude of a 3D magnetic field generated by the magnetic force pen;
• and
• a control unit configured to select a portion of the plurality of pieces of position information collected by the plurality of magnetic force sensors to determine a position of the magnetic force pen,
• wherein the selection reference for the control unit to select the position information is a magnitude value of a magnetic field vector, and the control unit calculates a position of the magnetic force pen by selecting one or two pieces of position information having the largest magnitude value of the magnetic field vector among the pieces of position information input from the plurality of magnetic force sensors.