POWER SUPPLY FOR AN ELECTRICALLY DRIVABLE, LIQUID CRYSTAL BASED GLAZING; SUPPLY PROCESS OF SAID GLAZING

摘要

An electrically-controlled liquid crystal glazing unit can include a substrate carrying a liquid crystal element disposed between a first electrode and a second electrode connected to an electrical power supply. The liquid crystal element can transform from a diffusing state at zero voltage to a transparent and/or colored state at a sinusoidal AC voltage having an operating amplitude (V0). In some examples, the electrical power supply is configured to apply a start-up voltage whose amplitude progressively increases from zero up to the operating amplitude (V0) and/or a shut-down voltage (Vs(t)) whose amplitude decreases progressively from the operating amplitude (V0) down to zero.