Electronic control system for automatic rearview mirrors for aut

Details Electronic control system for automatic rearview mirrors for aut Electronic control system for automatic rearview mirrors for aut

1984-03-30

1986-04-08

Corbin, John K.

350281, G02B 1700

Patent

active

045808759

ABSTRACT:
An electronic control system for automatic rearview mirrors for automotive vehicles, the control system being effective to detect and compare the relative brightness of light forwardly and rearwardly of the vehicle and respond automatically to annoying glare from the rear of the vehicle and move a reflective element from a full reflective mode to a partial reflective mode and thereafter automatically return the reflective element to a full reflective mode after the source of the annoying glare is removed, the glare threshhold being determined as a function of the ambient light level, of a long, smoothed time average of the ambient light level, of a short smoothed time average of the glare producing light level, and of the recent activity of the mirror.

REFERENCES:
patent: 4443057 (1984-04-01), Bauer et al.

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