Patent ID: 8384855

Claim:
A method for controlling a switchable shutter capable of assuming a light state, a dark state and at least one intermediate state, by the use of a shutter control system operatively connected to the shutter and capable of detecting at least high input and low input and changes therebetween, the method comprising: i) switching the shutter from a dark state to an intermediate state if a change from high input to low input is detected; ii) maintaining the shutter in the intermediate state for a predetermined period of time T 1 of at least about 100 milliseconds if low input continues to be detected during period of time T 1 ; iii) switching the shutter from the intermediate state to a light state at the end of period of time T 1 if low input is detected at the end of period of time T 1 ; and, a) switching the shutter to a dark state if a change from low input to high input is detected, b) maintaining the shutter in a dark state if high input continues to be detected.