Patent ID: 8264265

Claim:
An automatic darkening filter eye protection device, comprising: a liquid crystal device filter having a first control terminal and second control terminal; first and second driver circuits coupled to said first control terminal, each said first and second driver having a respective control input; third and fourth driver circuits coupled to said second control terminal, each said third and fourth driver circuits having a respective control input; first, second, third, and fourth time delay circuits coupled respectively to said control input of said first, second, third, and fourth driver circuits; first, second, third, and fourth switches coupled respectively to said first, second, third, and fourth time delay circuits, each said first, second, third, and fourth switch configured to couple its respective time delay circuit to one of an on voltage supply or an off voltage supply; and a switch control circuit configured to alternately operate said first and fourth switches concurrently and said second and third switches concurrently.