Automatic Day-Night Mirror Description

The Electrochromic Mirror automatically changes its reflectance to ensure maximum rear vision while minimizing glare in all types of driving conditions. It utilizes a thin layer of electrochromic material between two plates of conductive glass and two photocell sensors to determine light conditions in the front and back of the vehicle. At night, as the glare of headlights from behind increases, the mirror gradually becomes darker to absorb the glare. In the daytime, the mirror is in a clear state and offers high reflectance. The Electrochromic Mirror uses a three-position switch to turn on and select the sensitivity of the mirror.

The Electrochromic Mirror uses three electrical inputs that affect its operation. The mirror also uses the Headlight and Ambient (photocell) Sensors to determine light conditions. With Ignition in RUN, battery voltage is applied to terminal 1 and ground to terminal 2. With the Mirror Switch in MIN, battery voltage is applied to the mirror solid state unit. This is used as the power supply and also sets the mirror's sensitivity to a low level. The MIN position can be used for city driving and sets the mirror to a low sensitivity level. With the Mirror Switch in MAX, the mirror is set to a high sensitivity level. This causes the mirror to darken at a lower glare level.


Terminal 3 is used to reset the mirror to a daytime clear state when voltage is applied to it. With the Transaxle Position Switch in REVERSE, battery voltage is applied to the reset input terminal 3 of the mirror. The mirror will gradually change to a clear state and high reflectivity.