Vehicle rearview mirror system with protocol detection

  • US 6,992,573 B2
  • Filed: 11/04/2003
  • Issued: 01/31/2006
  • Est. Priority Date: 11/05/2002
  • Status: Expired due to Fees
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First Claim
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1. A vehicular rearview mirror system suitable for use in a vehicle having a vehicle control, said vehicle control generating an output having a particular protocol representing a state of said output, said vehicular rearview mirror system comprising:

  • a variable reflective element, said variable reflective element assuming a partial reflectance level in response to a drive signal;

    a mirror control, said mirror control responsive to the output of the vehicle control for generating at least one mirror control output, said at least one mirror control output including a value for said drive signal;

    said mirror control determining a protocol of said output of said vehicle control including monitoring said output of said vehicle control and attempting to conclude a state of said output of said vehicle control; and

    said mirror control determining the protocol of said output at least in part by maintaining a running parameter.

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