Electronic control unit for mirror 1 (fig. 12.70) receives information from photo sensors 2 and 3. If the illumination from behind is greater than from the front, the electronic unit supplies voltage to the conductive coating 8, which is located between the protective glasses 4 and 6 of the mirror. Depending on the magnitude of the supplied voltage, the transparency of the electrolyte layer 5 changes. The greater the voltage supplied, the darker the electrolyte layer. As a result, the intensity of light reflection from mirror 7 decreases.
(Material republished from the website: Audimanual.ru)