Sleep support apparatus

Abstract

A sleep support apparatus includes a pair of electrocardiographic electrodes that detect an electrocardiographic signal, a photoelectric pulse wave sensor that includes a light emitter and a light receiver and that detects a photoelectric pulse wave signal, peak detectors that respectively detect the peaks of the electrocardiographic signal and the photoelectric pulse wave signal, a pulse wave transit time clock that obtains a pulse wave transit time from a time difference between the peak of the photoelectric pulse wave signal and the peak of the electrocardiographic signal, a sleep state detector that determines that a user's body has not reached a state suitable for sleep when the pulse wave transit time is less than or equal to a certain threshold, and a forearm heater that increases a temperature of a forearm when it is determined the user's body has not reached a state suitable for sleep.

Dependencies are inferred from the claim text.