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Method for initiating and controlling a lighting equipment

  • US 8,405,317 B2
  • Filed: 08/01/2009
  • Issued: 03/26/2013
  • Est. Priority Date: 10/02/2008
  • Status: Active Grant
First Claim
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1. A method for initiating and controlling a lighting equipment, comprising the steps of:

  • a. turning on lighting equipment at a maximum lighting level according to specification required by an original manufacturer by applying a first alternating current (AC) current, provided that no first AC current used during a previous stable operation of the lighting equipment is stored;

    b. performing a dimming operation to modulate a power load of the lighting equipment from the first AC current down to a second AC current and detecting whether a flicker of light may occur due to a fluctuation in AC current, wherein the detecting comprises detecting and analyzing consecutive AC wave peaks supplied to the lighting equipment using an analog-to-digital converter, followed by comparing the maximum peak value with the minimum peak value;

    c. if detecting that a flicker of light may occur, storing and setting a lighting level of the lighting equipment provided by the second AC current as a minimum lighting level;

    d. calculating to obtain a current compensation value that the second AC current must be increased to a third AC current to prevent the occurrence of flicker and performing immediately a current compensation by applying the third AC current to prevent the occurrence of flicker; and

    e. allowing the lighting equipment to stably operate at the third AC current and storing the third AC current for initiating the lighting equipment next time.

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