Patent ID: 7998079

Claim:
A sleep information processing apparatus for evaluating a sleep feature of a user comprising: a sensing means for sensing pulse wave data of the user; a storage means for storing at least one relation information set, which indicates a relationship between model pulse wave data and corresponding sleep feature data, wherein the corresponding sleep feature data indicates a corresponding predetermined sleep feature; a sleep evaluating means for evaluating the corresponding predetermined sleep feature based on the sensed pulse wave data of the user and the at least one relation information set; and a notifying means for notifying evaluation result data to the user based on the evaluated corresponding predetermined sleep feature, wherein when the corresponding predetermined sleep feature includes wake-up-mood quality, the relationship indicated by the at least one relation information set is determined in view of at least one of the following corresponding sleep feature data: a heart rate before a wake-up time, a variation rate of a heart rate before the wake-up time, a parasympathetic nerve activity value before the wake-up time, and a probability of a sleeping condition to be defined as a rapid eye movement sleep.