WAKE-UP DEVICE

A wake-up device (1) comprises clock means (2), wake-up timer means (3), controllable wake-up stimulus means (4), and a control device (5) for controlling the wake-up stimulus means (4). The wake-up stimulus means is capable of varying an intensity of the wake-up stimulus. The wake-up stimulus is started at a relatively low intensity at a predetermined advance time (tA) before the intended time of waking up (tWU), in such a manner that the intensity of the wake-up stimulus is gradually increased in accordance with a predefined wake-up program. The wake-up device further comprises sleep quality monitor means (10) for monitoring the quality of the sleep of a user, and for generating a sleep quality monitor signal (S) indicative of the quality of the sleep of the user. The control device is responsive to the sleep quality monitor signal (S) received from the sleep quality monitor means to amend the wake-up program.