What does an auto-dimming rearview mirror mean?
2 Answers
An auto-dimming rearview mirror is a feature of the vehicle's interior rearview mirror. When the headlights of a following vehicle shine onto the interior rearview mirror, it can cause glare. If the mirror is equipped with an auto-dimming function, this feature will activate, ensuring optimal visibility for the driver without causing glare. Below are related details: 1. Explanation of auto-dimming rearview mirror: The auto-dimming rearview mirror has two photodiodes—one installed on the front of the mirror and one on the back—to detect light from the front and rear of the vehicle. 2. Function of auto-dimming rearview mirror: When the headlights of a following vehicle reflect onto the mirror, the signals from the two photodiodes compare the light intensity. The electronic controller then applies voltage to darken the mirror's color.
The auto-dimming rearview mirror is the kind of mirror in the car that can automatically detect strong light from vehicles behind and then darken to prevent the glare from hurting your eyes. I find this feature particularly useful, especially when driving on highways at night and encountering drivers with high beams. Before, I would often get blinded and had to manually flip the anti-glare switch, which was quite troublesome. The automatic version now comes with sensors and an electronic coating that instantly dims the mirror when strong light is detected, eliminating the need for constant eye adjustment. It also doesn’t reflect excessive light like ordinary mirrors, providing clearer vision and reducing fatigue. This makes driving safer, especially for those with poor eyesight. Nowadays, many mid-range and higher-end cars come equipped with this feature, making it a worthwhile investment that helps avoid rear-end collision risks.
