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US 9,750,919 B2Granted
Sleep control device and sleep control method
AssigneeToyota Jidosha Kabushiki Kaisha
InventorHisashi Iizuka
Life of this patent
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Abstract
A sleep variable calculation portion predicts a change in a sleep depth of a sleeping subject. When the sleep variable calculation portion predicts that the subject may be in a transition state in which the sleep depth of the subject further increases at a wake-up time of the subject, a stimulus presentation device provides a stimulus to the subject at a point in time preceding the wake-up time.
Claims9
A sleep control device, comprising:
- a processor programmed to:
- predict a change in a sleep depth of a sleeping subject;
- provide a stimulus to the subject at a second time preceding a first time, when the predicting the change has predicted that the subject may be in a transition state in which the sleep depth of the subject further increases at the first time that is set to wake the subject up;
- predict a phasic REM sleep period during which the sleeping subject has a phasic REM sleep, and
- provide the stimulus to the subject at the second time so as to inhibit the subject from progressing into the phasic REM sleep from a tonic REM sleep based on the predicted phasic REM sleep period.
2 more elements
Dependencies are inferred from the claim text.