Automatic antidazzle semitransparent mirror
First Claim
Patent Images
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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Accused Products
Abstract
A reflection mirror using a liquid crystal cell is disclosed. A first thin film consisting of one of magnesium difluoride, silicon dioxide, silicon monoxide or titanium dioxide is formed on a glass substrate supporting the liquid crystal cell and a thin aluminum film is formed on the first thin film as a reflection mirror layer. Adhesiveness of the thin aluminum film to the glass substrate is strengthened by the first thin film. A second thin film is formed on the thin aluminum film to protect the same from being hurt. The reflection mirror may be used as a dazzle-free reflection mirror of an automotive vehicle.
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Citations
7 Claims
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1. A reflection mirror comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A reflection mirror for a vehicle comprising:
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a light shielding frame body attached to a vehicle body and having an opening therein; a glass substrate provided within said frame body; a thin intermediate film formed on said glass substrate opposite to said opening of said frame body and consisting of one of magnesium difluoride or titanium dioxide; a thin semitransparent metal film formed on said intermediate film for reflecting and passing therethrough the light incident thereto through said opening of said frame body; a photo sensor positioned behind said metal film within said frame body for detecting an intensity of light passed through said metal film; an electric circuit connected to said photo sensor for determining a desired reflectivity of light at said metal film in accordance with the detected intensity of light; and means provided within said frame body and driven by said electric circuit for adjusting the reflectivity of light to the desired reflectivity determined by said electric circuit.
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Specification