• US 3,862,798 A
  • Filed: 11/19/1973
  • Issued: 01/28/1975
  • Est. Priority Date: 11/19/1973
  • Status: Expired due to Term
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First Claim
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1. A rear view mirror assembly comprising a plate providing a reflective surface, a layer of liquid crystal compound in front of said reflective surface, said compound being essentially transparent in its quiescent state and opaque when voltage is applied thereto, a voltage source, light-responsive means controlling said voltage source, and electrical means for connecting said voltage source to said compound, said lightresponsive means being effective, when a predetermined light level impinges thereon, to apply a corresponding voltage level to said compound, said light-responsive means including a photocell having a resistance which decreases when light impinges thereon, said electrical means including resistive means connected in series with said photocell to provide a voltage divider network across said voltage source, said network having an output voltage terminal connected to one side of said compound and a ground terminal connected to the other side of said compound.

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