Patent ID: 8259535

Claim:
A wake up stimulus control system, comprising a control unit arranged to receive a user-determinable wake up parameter input and to control at least one stimulus source for supplying a wake up stimulus; and a coupling for operably coupling said at least one stimulus source to said control unit, wherein the at least one stimulus source is controllable by the control unit in such a way that the stimulus source provides a gradually increasing stimulus output, in dependence on said input wake up parameter, wherein the system further comprises at least one stimulus sensor arranged for sensing an ambient stimulus level proximate a user of the wake up stimulus control system, said ambient stimulus level being influenced at least in part by the stimulus output of said at least one stimulus source, said stimulus sensor being operably coupled to the control unit; and wherein the control unit controls the at least one stimulus source in dependence on the ambient stimulus level sensed by the at least one stimulus sensor.