Optrel Holding Ag

Leo Keller

Arno Lenzi

Daniel Iranyi

Uwe Werner

Tom Stäubli

Martin Esposito

Ramon Hofer Kraner

A face protector for protecting a worker's eyes and face comprises an auto-darkening filter unit which in turn comprises a filter pane or ADF pane and an electronics unit driving the ADF pane, the electronics unit being configured to switch the ADF pane automatically from a transparent state to a darkened state. A hard shell unit comprises a shell carrying an ADF unit with the ADF and being shaped to protect a wearer's face, the shell being manufactured of a plastic material. A soft shell unit comprises a cap for protecting the crown of the wearer's head and a neck protector for protecting the wearer's neck, the soft shell unit being made of a combination of flexible fabric with support elements.

Face protector

The electro-optical glare protection filter includes a liquid crystal cell, which is a laterally extended liquid crystal cell defining a volume between two laterally extended sides. The volume containing liquid crystals and having, in a vertical direction perpendicular to lateral directions, a thickness being smaller than an extension of the volume in any lateral direction. The FFS cell includes a first electrode structure and a second electrode structure, which are arranged to change an orientation of the liquid crystals in the volume when a voltage is applied between them. Both the first and the second electrode structure are present at the same laterally extended side of the volume. The first electrode structure may include a plurality of electrically separate electrodes, and the second electrode structure may include a plurality of electrode lines.

Electro-optical glare-protection filter with a liquid crystal cell being a fringe-field switching cell for a welder protection device

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Ruti ZH, Switzerland

Leo Keller