Eyeblink detection device

An eyeblink detection device comprising:

• circuitry configured to:
• generate time-series data on differential values of an eye potential of a subject;
• determine a frequency characteristic value from the time-series data on the eye potential differential values, the frequency characteristic value representing a frequency characteristic of the eye potential differential values;
• set a threshold coefficient based on the frequency characteristic value of the eye potential differential values;
• set an upper threshold and a lower threshold based on a number obtained by multiplying a standard deviation of the differential values in the time-series data on the eye potential differential values by the threshold coefficient, the upper threshold and the lower threshold being used for detecting an eyeblink waveform in the time-series data on the eye potential differential values;
• detect a change in the eye potential differential values as the eyeblink waveform, the change occurring in the time-series data either when the eye potential differential value becomes larger than the upper threshold and, after that, changes from the upper threshold to the lower threshold within a predetermined time or when the eye potential differential value becomes smaller than the lower threshold and, after that, changes from the lower threshold to the upper threshold within the predetermined time;
• and
• output an eyeblink detection result based on the eyeblink waveform to a display.