Automatic automobile rear view mirror assembly

  • US 5,064,274 A
  • Filed: 03/30/1989
  • Issued: 11/12/1991
  • Est. Priority Date: 08/26/1987
  • Status: Expired due to Fees
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First Claim
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1. An automobile variable reflectivity mirror assembly for mounting to an automobile structure and for use with an electrical power supply, the assembly being operable to provide at least a relatively higher reflectivity orientation and a relatively lower reflectivity orientation, comprising:

  • (a) a housing;

    (b) a reflective panel associated with said housing for movement between said higher reflectivity and lower reflectivity orientations, said panel providing higher reflectivity in the higher reflectivity orientation, and providing lower reflectivity in the lower reflectivity orientation;

    (c) a motor having means to move a drive element in a first or second direction;

    (d) means for actuation, said means being associated with said housing, for driving engagement with the drive element to move the panel between the higher and lower reflectivity orientations;

    (e) electrical circuit means comprising photosensing means for determining the ambient light level about the automobile and the incident light level upon the reflective panel, and for generating electrical signals proportionately representative of said light levels thereof;

    said circuit means further comprising means for comparing the additive sum of said ambient light level signal and said incident light level signal to an independent voltage, the comparing means having an output;

    the circuit means having means for directing current through the motor to move the drive element and the actuation means to position the panel in the higher reflectivity orientation or lower reflectivity orientation in response to the output of the comparing means.

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