POSITION DETECTION DEVICE AND POSITION DETECTION METHOD

To provide a position detection device and a position detection method that can accurately detect the position of an indicator.SOLUTION: A position detection device detects the position of a pen-shaped indicator, and the indicator comprises: a first electrode provided at one end in the axial direction; a second electrode provided around the axis; a planar sensor detecting the positions of the first and second electrodes; and a control unit 10. The control unit includes: a first electrode position detection unit that detects the positions of the first electrode in a first direction on the sensor and a second direction different from the first direction, particularly for the second direction, by scanning within a first range determined from a result of an arbitrary operation; a second electrode scanning reference position calculation unit that scans the second electrode in an area of a predetermined size on the first and second directions with the position of the first electrode as a reference, to calculate a scanning reference position; and a second electrode position detection unit that detects the positions of the second electrode in the first and second directions, particularly for the second direction, by scanning within a second range with the scanning reference position as a reference, which is calculated by the second electrode scanning reference position calculation unit.SELECTED DRAWING: Figure 3 【課題】指示器の位置を精度よく検出可能な、位置検出装置及び位置検出方法を提供する。【解決手段】ペン状の指示器の位置を検出する位置検出装置であって、指示器は、軸方向の一端に設けられた第１電極と、軸の周囲に設けられた第２電極、第１電極と第２電極の位置を検出する平面状のセンサ及び制御部１０を備える。制御部は、センサ上の第１方向と、第１方向とは異なる第２方向の第１電極の位置を、特に第２方向は任意の操作結果で定めた第１範囲内を走査して検出する、第１電極位置検出部と、第１電極の位置を基準とした第１及び第２方向上の所定の大きさの領域内において、第２電極を走査して走査基準位置を計算する第２電極走査基準位置計算部と、第１及び第２方向の各々における第２電極の位置を、特に第２方向は、第２電極走査基準位置計算部により計算された走査基準位置を基準とした第２範囲内を走査して検出する、第２電極位置検出部を備える。【選択図】図３