Interior Rear View Mirror

[David H. Brotemarkle CPA]

So, another question about new to me 2008 Liberty Limited. There is some kind of lens or light on the back of the auto dimming mirror.
10 points for letting me know what it is for.
Thanks.

 

[Big Al]

With the electrochromic material added to an auto-dimming mirror, electric voltage changes the way in which it absorbs and reflects light. An auto-dimming mirror usually has a set of cameras or sensors (photodiode-based photodetectors) that are light-sensitive semiconductors, which turn light into current.

 

[JeepJeepster]

Thats how the mirror knows if its day time or night time... Otherwise it would be dimming constantly during the daytime. If you hold your finger over it for a bit when its sunny out, the mirror will start dimming.