Vacuum cleaner

  • US 6,055,702 A
  • Filed: 09/09/1998
  • Issued: 05/02/2000
  • Est. Priority Date: 11/27/1996
  • Status: Expired due to Fees
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First Claim
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1. A vacuum cleaner comprising;

  • dust suction path means for passing dust and air therethrough by a sucking force;

    dust sensor means for optically detecting a quantity of sucking dust and for outputting a detection signal, the dust sensor means being provided at a predetermined position of the dust suction path means;

    display means for visually displaying the quantity of detected dust; and

    display controlling means for receiving the detection signal from the dust sensor means, for outputting and supplying a driving signal to the display means, the driving signal being varied in stageless condition in correspondence to the quantity of dust.

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