Position calibration system and method

A position calibration system, comprising:

• a positioning substrate, a circular positioner being provided on an upper surface of the positioning substrate;
• a positioner sensing module;
• a memory unit;
• and
• a control unit, electrically connected to the positioner sensing module and the memory unit;
• wherein the control unit controls the positioner sensing module to scan the circular positioner on the positioning substrate in a first direction and a second direction respectively so as to acquire an intersected center position of the circular positioner as a calibration reference point of the positioning substrate with respect to the positioner sensing module and stores the calibration reference point in the memory unit;
• wherein the control unit records a first initial position and a first terminal position upon detecting an edge of the circular positioner when the control unit controls the positioner sensing module to scan the circular positioner in the first direction;
• the control unit acquires a midpoint between the first initial position and the first terminal position in the first direction as a first midpoint position;
• the control unit records a second initial position and a second terminal position upon detecting the edge of the circular positioner when the control unit controls the positioner sensing module to scan the circular positioner in the second direction;
• the control unit acquires a midpoint between the second initial position and the second terminal position in the second direction as a second midpoint position;
• and the control unit acquires the intersected center position of an extension line from the first midpoint position in a direction perpendicular to the first direction and an extension line from the second midpoint position in a direction perpendicular to the second direction;
• wherein the calibration reference point is used for calibration of a position of the positioning substrate and for automatic compensation of position deviation.