Automatic luminosity control device for car and motor bicycle headlamps

  • US 5,072,154 A
  • Filed: 03/13/1990
  • Issued: 12/10/1991
  • Est. Priority Date: 03/13/1990
  • Status: Expired due to Fees
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First Claim
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1. An automatic luminosity control device for a car or a motor bicycle headlamps, comprising a photosensitive member (Ru) being set in the front of said car or motorcycle, and a variable bistable oscillator comprising a first transistor (Q1), a second transistor (Q2), a capacitor (C2), said photosensitive member (Ru), a first resistor (R1), a second resistor (R2), a third resistor (R3) and a fourth resistor (R4), said headlamps comprising distance light means and dim light means, said distance light means and dim light means being connected with said variable bistable oscillator whereby when the said photosensitive member is activated, the luminosity of said distance light means is gradually reduced while the luminosity of said dim light means is increased.

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