RANGE-BASED CONTROL OF THE TRANSMISSION OF A VARIABLE TRANSMISSION LENS

摘要

The invention relates to a variable transmittance device (2) including at least one variable transmittance lens (4) and a control circuit (5) comprising at least one sensor (8) suitable for measuring an illuminance (E), the control circuit (5) being suitable for automatically controlling the value of the transmittance of the variable transmittance lens (4) depending on the illuminance (E) measured by the sensor (8), wherein the control circuit (5) defines a plurality of successive illuminance ranges (P) each illuminance range (P) being bounded by a minimum illuminance value (Emin) and a maximum illuminance value (Emax), and wherein the control circuit (5) is suitable for controlling the transmittance of the lens (4) to a plurality of setpoint transmittance values (Tv) respectively corresponding to said plurality of illuminance ranges (P).