Electricity: electrical systems and devices – Safety and protection of systems and devices – With specific current responsive fault sensor
Patent
1994-08-08
1995-06-13
Pellinen, A. D.
Electricity: electrical systems and devices
Safety and protection of systems and devices
With specific current responsive fault sensor
361 57, 361 56, H02H 900
Patent
active
054248981
ABSTRACT:
A drive circuit for the interior, and one or more of the exterior, mirrors in a vehicle mirror system provides a drive signal to each of the mirrors to establish the reflectance level of that mirror. Circuit protection is provided to sense a fault condition on one of the electrical conductors extending to the exterior mirrors and to take corrective action in response to a fault condition. The circuit protection may also respond to a fault condition in the electrical supply of the drive circuit and take suitable corrective action. In certain embodiments, each mirror in the mirror system is responsive to one of a plurality of output amplifiers, which is responsive to a distinct desired reflectance signal level in order to color that mirror to a reflectance level that is distinct from that of the other mirrors. In other embodiments, separate drive circuits and associated power conditioning means are provided for each mirror so that the disabling of one mirror will not preclude the other mirror(s) in the system from providing glare protection.
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Larson Mark L.
O'Farrell Desmond J.
Donnelly Corporation
Leja Ronald W.
Pellinen A. D.
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