Glare protection device

Details Glare protection device Glare protection device

1997-08-12

1999-03-09

Sikes, William L.

Liquid crystal cells, elements and systems

Liquid crystal system

Liquid crystal eyewear

219147, 250206, G02F 1133, A61F 906, B23K 902

Patent

active

058807934

ABSTRACT:
Electro-optical glare protection device is disclosed for use with protective glasses, protective helmets or protective masks with at least one optical detector, especially a photodiode, with an electro-optical glare protection plate incorporating at least one liquid crystal cell, and with an electronic circuit for the adjustment and setting of the optical transmission of this glare protection plate. The protective device comprises a non-optical detector and a switch connected to the electronic circuit for adjusting the optical transmission of the glare protection plate. The switch links the signals produced by these detectors with each other as an and/or circuit. The electronic circuit generates corresponding switch signals.

REFERENCES:
patent: Re29684 (1978-06-01), Gordon
patent: 4071912 (1978-02-01), Budminger
patent: 4114366 (1978-09-01), Renner et al.
patent: 4152846 (1979-05-01), Witt
patent: 4241286 (1980-12-01), Gordon
patent: 4638146 (1987-01-01), Koyama
patent: 4728173 (1988-03-01), Toth
patent: 5248880 (1993-09-01), Fergason
patent: 5252817 (1993-10-01), Fergason et al.
patent: 5315099 (1994-05-01), Gunz et al.
European Search Report issued Oct. 19, 1993 for EP 93 11 0693.

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