Portable Electronic Device with Environmental Sensor

摘要

There is provided a portable electronic device with one or more environmental sensors (12, 13, 21, 24, 31) for measuring an environmental or ambient parameter, a compensator (25,26,35) for reducing the difference between a sensor output (Ts) and the ambient parameter (T(out), T(in)), the compensator (25,26, 35) being connected to receive a first input based on the sensor output (Ts) and a second input (x(k)) based on an output (x(k+1)) of compensator calculated during a previous time step of calculation, and a context evaluator (36) for replacing the second input (x(k)) by an input selected based on conditions as determined by the context evaluator (36).