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Apparatus and method for adjusting lights according to the level of ambient light

  • US 5,406,173 A
  • Filed: 12/10/1993
  • Issued: 04/11/1995
  • Est. Priority Date: 12/10/1993
  • Status: Expired due to Fees
First Claim
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1. An apparatus for controlling a light source, said apparatus comprising:

  • (a) detecting means for detecting whether an area is occupied;

    (b) light sensing means for measuring a level of ambient light;

    (c) timing means, coupled to said detecting means, for generating a first time-out signal when the area is unoccupied for a first time period; and

    (d) light control means, coupled to said detecting means and to said light sensing means, for controlling said light source in response to said detecting means, said first time-out signal, and said light sensing means;

    whereinsaid light control means turns said light source ON when said detecting means detects the area is occupied;

    said light control means adjusts said light source brighter when the light level measured by said light sensing means is below a predetermined level; and

    said light control means turns said light source OFF when said timing means generates said first time-out signal.

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