Automatic rearview mirror with filtered light sensors

  • US 4,799,768 A
  • Filed: 04/27/1987
  • Issued: 01/24/1989
  • Est. Priority Date: 04/27/1987
  • Status: Expired due to Fees
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First Claim
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1. An automatic rearview mirror comprising:

  • a reflective element having a plurality of reflective states;

    light sensor means for outputting a signal responsive to light directed onto said light sensor means, said light sensor means including a detector means for outputting the signal responsive to the intensities of electromagnetic wavelengths received by said detector means and a filter means for filtering the electromagnetic wavelengths reaching said detector means, the spectral response of said detector means and the spectral transmission of said filter means being such that together the spectral response of said light sensor means more closely approximates the spectral response of the human eye than does the unfiltered detector means; and

    a control means responsive to at least the signal for controlling the reflective state of said reflective element.

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