A method for regenerating liquid crystals of a variable light-scattering electrically controlled system including a substrate carrying a liquid crystal element between two electrodes connected to an electrical power supply, the method including: supplying data for the regeneration comprising a regeneration duration DT and at least one regeneration setpoint C, programming for the regeneration comprising comparing operational data with the regeneration setpoint C, automatically regenerating by automatic power-down of the electrical circuit for the period of the duration DT, once the setpoint or setpoints C have been reached, and programming for an operating decision referred to as ‘forced mode’ during the regeneration in progress depending on the history of use and/or the context of use.