Single sensor adaptive drive circuit for rearview mirror system

  • US 5,193,029 A
  • Filed: 11/19/1991
  • Issued: 03/09/1993
  • Est. Priority Date: 11/19/1991
  • Status: Expired due to Fees
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First Claim
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1. An automatic rearview mirror system for a vehicle comprising:

  • a reflective element that is actuatable between at least two different reflectance conditions;

    a single light sensing means for sensing light incident to said reflective element; and

    processing means responsive to said light sensing means for producing a slow-transient indication as a function of said light incident to said reflective element and for indicating a desired reflectance level of said reflective element as a function of said slow-transient indication and said light incident to said reflective element.

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