Patent ID: 7218577

Claim:
A method of synchronising the analogue display of the current time of a timepiece, fitted with a movement having an electronic time base, with said time base, said analogue display including at least one analogue indicator, which is coupled in rotation to a wheel having at least one aperture, said wheel being associated with a proximity sensor arranged for detecting said aperture and for determining the position of a reference semi-axis defined by said aperture, said synchronisation method comprising the following steps: driving said analogue indicator in an accelerated advance mode until said aperture of said wheel passes opposite said proximity sensor; determining the real angular position of said reference semi-axis by electronic means receiving a measurement signal provided by said proximity sensor; calculating, for said analogue display of said timepiece, the theoretical angular position of said reference semi-axis as a function of a reference current time given by said electronic time base; and driving said analogue indicator until the real angular position of said reference semi-axis corresponds to said theoretical angular position.