Detecting device

A detecting device comprising:

• a sensor unit having a plurality of electrodes;
• and
• a detector configured to detect a gesture corresponding to movement of an object in a space on the sensor unit, wherein
• the detector detects that a predetermined gesture is made when a distance between the sensor unit and the object is equal to or smaller than a first distance,
• the detector detects that the predetermined gesture is made when the distance between the sensor unit and the object is equal to or smaller than a second distance larger than the first distance and is larger than the first distance and when a movement speed of the object to be detected in the space is equal to or smaller than a predetermined value,
• the detector comprises:
• a coordinate calculator configured to calculate a spatial coordinate of the object in the space based on the detected value of each of the electrodes;
• and
• a gesture determination processor configured to determine whether the predetermined gesture is made based on the spatial coordinate,
• the coordinate calculator calculates:
• first data indicating coordinate data in an X-direction;
• second data indicating coordinate data in a Y-direction orthogonal to the X-direction;
• and
• third data indicating coordinate data in a Z-direction orthogonal to the XY-plane,
• the third data is larger as the distance between the sensor unit and the object is smaller,
• the gesture determination processor determines that the predetermined gesture is made when the third data is equal to or larger than a first threshold corresponding to the first distance, and
• the gesture determination processor determines that the predetermined gesture is made when the third data is smaller than the first threshold and equal to or larger than a second threshold corresponding to the second distance, and when a movement amount per unit time in the XY-plane is equal to or smaller than a second threshold and when a magnitude of a movement amount per unit time in the Z-direction is equal to or smaller than a third threshold.