A Brief Explanation of Auto-dimming Rearview Mirrors

One of our goals at Jaguar Huntsville is to help drivers become well-informed vehicle owners. Auto-dimming rearview mirrors became popular in the 1980s. An auto-dimming rearview mirror plays in important role in helping you maintain clear vision. Let's see how below.

When glare from the headlights of the car behind you hits your eyes, it can hinder your reaction time by up to 1.4 seconds. While this may not seem like a significant amount of time, a car moving at 60 mph will travel about 123 feet in that given time. Auto-dimming headlights are usually made with two sensors that are cameras or photodetectors. When these sensors and the microprocessor detect light from the vehicle behind you, they will send a charge to an electrochromic gel that's between the two layers of glass that make up the mirror.

Once the gel has received the appropriate charge, it will darken through oxidation-reduction reactions. The darker gel will restrict how much light reflects off of the driver's face.

 

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