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Automatic antidazzle semitransparent mirror

  • US 4,655,549 A
  • Filed: 02/22/1985
  • Issued: 04/07/1987
  • Est. Priority Date: 02/27/1984
  • Status: Expired due to Fees
First Claim
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1. A reflection mirror comprising:

  • a glass substrate;

    a liquid crystal cell supported on said glass substrate for changing transmittivity of light incident thereto in accordance with an electric voltage applied thereto;

    a first thin film formed on said glass substrate and consisting of one of magnesium difluoride, silicon dioxide, silicon monoxide or titanium dioxide;

    a thin aluminum film on said first thin film forming a semitransparent mirror surface which transmits a portion of and reflects a portion of the light incident thereto through said liquid crystal cell;

    a photo sensor positioned behind said thin aluminum film for detecting an intensity of the light incident thereto through said liquid crystal cell and said thin aluminum film;

    a driving circuit connected to said photo sensor for applying said electric voltage to said liquid crystal cell in accordance with the intensity of the light detected by said photo sensor; and

    a light shielding body encasing therein said glass substrate, said liquid crystal cell, said first thin film, said thin aluminum film and said photo sensor.

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