Patent ID: 8647253

Claim:
A sleep control device comprising: an electronic control unit; a sensor configured to detect a physiological information of the individual person and output to the electronic control unit, wherein the electronic control unit is configured to receive the output of the sensor, detect a drowsiness level of the individual person, and output the detected drowsiness level to a sleep pattern selection section; wherein the electronic control unit contains a plurality of predetermined sleep patterns matched to respective drowsiness levels, each of the predetermined sleep patterns having a target sleep depth level and a target sleep time, the target sleep depth levels of the plurality of predetermined sleep patterns matching drowsiness levels equal to or below a predetermined drowsiness level being a predetermined sleep depth level and the target sleep depth levels of the plurality of predetermined sleep patterns matching drowsiness levels exceeding the predetermined drowsiness level being a maximum sleep depth level; wherein the electronic control unit is configured to select one of the plurality of predetermined sleep patterns that matches the detected drowsiness level contained in the electronic control unit; wherein the electronic control unit is configured to control the sleep depth level of the individual person in accordance with the target sleep depth level and the target sleep time of the selected predetermined sleep pattern; and wherein the electronic control unit is configured to execute a first sleep control to maintain the sleep depth level of the individual person at the predetermined sleep depth level below the maximum sleep depth level for the target sleep time, if the detected drowsiness level is equal to or below the predetermined drowsiness level.