Glare shielding device and process for operating same

An electro-optical glare shielding device for protective glasses, protective helmets, or protective masks, comprising:

• an electro-optical glare shield including at least one liquid crystal cell;
• an electronic circuit connected to said electro-optical glare shield for applying an electric operating voltage thereto for varying an optical transmission value of said at least one liquid crystal cell;
• and
• a light sensor connected to said electronic circuit for providing an input signal thereto indicative of sensed light adjacent to said electro-optical glare shielding device;
• wherein said at least one liquid crystal cell includes means for extending liquid crystal cell service life comprising at least one corrosion resistant layer and at least one of a corrosion-neutral liquid and corrosion-inhibiting additives, and wherein said electronic circuit produces an electric operating voltage such that the optical transmission value of said at least one liquid crystal cell is less than about 1% and said electric operating voltage has a frequency of less than about 32 Hertz.