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Rear light detection device for an automatic antiglare mirror

  • US 5,677,526 A
  • Filed: 08/11/1995
  • Issued: 10/14/1997
  • Est. Priority Date: 08/25/1994
  • Status: Expired due to Term
First Claim
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1. A rear light detection device for an automatic antiglare mirror including a variable light transmissivity layer and a reflecting film provided behind the variable light transmissivity layer, reflectivity of the reflecting film being variably controlled by controlling the light transmissivity of the variable light transmissivity layer CHARACTERIZED IN THAT said reflecting film is made of a half mirror and THAT said device comprises a light transmitting member provided behind the half mirror for collecting light which has been transmitted through the half mirror, and a photo-sensor for receiving light collected by the light transmitting member.

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