Operation detection device for key operation of keyboard device, operation detection method of key operation, and keyboard device

A keyboard device comprising:

• a plurality of keys;
• and
• an operation detection device for a key operation of the plurality of keys, and comprising:
• a conductive unit disposed on each of the plurality of keys;
• a substrate disposed facing each of the plurality of keys in a pressing direction of the plurality of keys, and provided with:
• a sensor comprising at least first and second coils, the sensor being disposed spaced from one key, among the plurality of keys, so that at least one of the first or second coil outputs a signal corresponding to a distance between the one key and the respective sensor;
• and
• a detection unit, including a processor, that detects a displacement of the one key in at least one of a yaw direction or a roll direction based on signals output from the first and second coils during a key pressing stroke of the one key.

An operation detection method of a key operation of a keyboard device comprising:

• a plurality of keys;
• and
• a conductive unit disposed on each of the plurality of keys;
• a substrate disposed facing each of the plurality of keys in a pressing direction of the plurality of keys, and provided with:
• a sensor comprising at least first and second coils, the sensor being disposed spaced from one key, among the plurality of keys, so that at least one of the first or second coils outputs a signal corresponding to a distance between the one key and the respective sensor,
• where the detection method comprises detecting a displacement of the one key in at least one of a yaw direction or a roll direction based on signals output from the first and second coils in a key pressing stroke of the one key.