Auto-Dimming Rearview Mirrors Explained

Many a driver has had the unpleasant experience of another vehicle trailing close behind with their headlights glaring in your rearview mirror. The bright light creates a blinding effect. However, after the vehicle passes or slows down, your vision is left with a blind spot.

The blinding or Troxler Effect has been shown to slow a driver's reaction time by more than one second. The invention of auto-dimming or electrochromic mirrors puts an end to the misery and lessens the danger.

The mirrors contain two sensors that are either miniature cameras or photodiode photodetectors. The components work in tandem with a microprocessor that detects light coming from behind the vehicle. When the technology detects bright light, a signal travels to the electrochromic gel housed within the mirror. The substance undergoes an oxidation process that alters the gel from transparent to a darker color. See the mirrors while test-driving a vehicle from Redding Kia in Redding, CA.

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