Digital electrochromic mirror system

Details Digital electrochromic mirror system Digital electrochromic mirror system

1999-07-13

2000-05-02

Spyrou, Cassandra

Optical: systems and elements

Glare or unwanted light reduction

With mirror

359608, 359267, G02B 508

Patent

active

060564105

ABSTRACT:
A vehicular electrochromic rearview mirror system includes an interior electrochromic rearview mirror assembly and at least one exterior electrochromic rearview mirror assembly. Each mirror assembly includes an electrochromic reflective element that assumes a partial reflectance level in response to a signal applied thereto. A drive circuit applies a drive signal to each of the electrochromic reflective elements. The drive circuit may include a digital controller, a master drive circuit responsive to the digital controller to apply a first drive signal to one of the electrochromic reflective elements and a slave drive circuit responsive to the digital controller to apply a second drive signal to a second of the electrochromic reflective elements. The second drive signal may be derived from the first drive signal. The drive circuit may include a digital controller and a switching power supply controlled by the digital controller to produce a drive signal.

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