Patent ID: 8243553

Claim:
A portable electronic device comprising a case containing a clock movement with a display mounted thereon and an external control element, said display comprising graduations and two analog display members arranged to face said graduations, said clock movement further comprising electronic circuits capable of producing time signals to be sent to control means of said display, wherein said electronic circuits are arranged to be selectively placed in one or the other of a plurality of operating modes, said plurality of operating modes comprising a first mode, the time mode, in which said display is provided to indicate the time, and the electronic device additionally comprising a sensor provided to perform a measurement of a physical magnitude and to repeat this measurement with a given frequency, said plurality of operating modes comprising a second mode, the acquisition mode, in which the two analog display members are provided to supply a first indication and a second indication respectively, said first indication being representative of the current value of said measurement, and said second indication being representative of a variation with time of said measurement, and the electronic device further comprising memory elements provided to record, in said acquisition mode, a succession of instantaneous values of said current value according to a given periodicity, said plurality of operating modes comprising a third mode, the history mode, in which said electronic circuits are provided to actuate said two analog display members so as to display in parallel within a predetermined time interval, on the basis of said succession of recorded values, two chronological value sequences, wherein a first of said sequences is directly representative of the values acquired by said measurement in said acquisition mode and the other of said sequences is calculated on the basis of said succession of recorded values and is representative of the variation with time of said measurement, wherein said electronic circuits are configured to implement a jump in the execution of said history mode in response to an action of a user using said external control element in order to control said display, so that the latter shifts from the display of a first value associated with a first stored value Pi to the display of a second value associated with a second stored value Pj located chronologically before or after said first stored value Pi and spaced in time from the latter by more than once the value of said given periodicity.