154nInterior rearview mirror with automatic dimmer
The semisolid reacts chemically to this
electrical current, thus providing
dimming of the mirror through an infi-
nitely-variable range (electrochromatic
technology).
As a result, it is no longer necessary to
dim the interior mirror manually, and the
driver can concentrate completely on
traffic conditions.
The interior rearview mirror with auto-
matic dimmer reduces glare from
following traffic by adapting the inten-
sity of the reflected images to corre-
spond to levels of light registered by
the unit's sensors. The mirror reverts to
its undimmed setting as soon as the
light source disappears. One light
sensor is mounted on the front of the
interior mirror housing. This forward-
facing sensor measures light intensity in
the area ahead of the vehicle. The
second light sensor is integrated within
the mirror's frame. The electronic
control system compares the light
intensity from front and rear. The differ-
ence provides the basic parameter
used to modulate an electrical current
and induce chemical changes in a
semisolid layer incorporated in the lens.
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