Automatic display mirror assembly

  • US 9,834,146 B2
  • Filed: 04/01/2015
  • Issued: 12/05/2017
  • Est. Priority Date: 04/01/2014
  • Status: Active Grant
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First Claim
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1. A display mirror assembly for a vehicle comprising:

  • an ambient light sensor for sensing an ambient light level and outputting an ambient light signal representative of the sensed ambient light level;

    a switchable reflective element that changes states between a high reflection mode and a low reflection mode;

    an electrochromic cell positioned in front of said switchable reflective element for variably attenuating light reflected from said switchable reflective element;

    a display positioned behind said switchable reflective element for generating a displayed image visible through said switchable reflective element and said electrochromic cell; and

    a controller in communication with said ambient light sensor, said electrochromic cell, said switchable reflective element, and said display, said controller compares the ambient light signal to a threshold level, wherein;

    if the ambient light signal exceeds the threshold level, said controller activates said display, sets said switchable reflective element to the low reflection mode and sets said electrochromic cell to a clear state with minimum attenuation, andif the ambient light signal does not exceed the threshold level, said controller deactivates said display, sets said switchable reflective element to the high reflection mode and varies attenuation by said electrochromic cell.

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