Discharge lamp driving method and electronic operators for implementation of the same
First Claim
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1. A power sourcing apparatus for driving a load to dissipate a predetermined amount of power, comprising:
- resonant circuit means incorporating said load;
switching means connected between a negative and positive voltage source adapted to alternately connect said resonant circuit means thereto when a zero current state at said switching means is detected;
synchronizing means for detecting a zero current state at said switching means and for driving said switching means, said synchronizing means being connected to said switching means and said resonant means; and
control circuit means for controlling the amount of charge to be absorbed from said positive and negative voltage source for transfer to said resonant circuit means thereby permitting said load to dissipate a predetermined amount of power.
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Abstract
The present invention relates to a method and apparatus for driving discharged lamps and which is adapted to maximize the luminous efficiency of a discharged lamp and its associated electronic driving apparatus. This is accomplished through the power sourcing characteristics of the driver, by causing the required power to dissipated while maintaining the power factor in the lamp as near unity as possible with the real components available for the implementation of the apparatus.
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Citations
17 Claims
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1. A power sourcing apparatus for driving a load to dissipate a predetermined amount of power, comprising:
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resonant circuit means incorporating said load; switching means connected between a negative and positive voltage source adapted to alternately connect said resonant circuit means thereto when a zero current state at said switching means is detected; synchronizing means for detecting a zero current state at said switching means and for driving said switching means, said synchronizing means being connected to said switching means and said resonant means; and control circuit means for controlling the amount of charge to be absorbed from said positive and negative voltage source for transfer to said resonant circuit means thereby permitting said load to dissipate a predetermined amount of power. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of driving a load to dissipate a predetermined amount of power, using a power sourcing apparatus having resonant circuit means incorporating said load, switching means connected between a negative and positive voltage source adapted to alternately connect said resonant circuit means thereto, synchronizing means for driving said switching means, said synchronizing means being connected to said switching means and said resonant circuit means;
- and control means for controlling the amount of energy drawn from said voltage source, comprising the steps of;
detecting a zero current state at said switching means by means of said synchronizing means; actuating said switching means to drive said resonant circuit means between said negative and positive voltage source when said zero current state is detected; actuating said control means when said resonant circuit means is connected to said positive voltage source to allow a predetermined amount of charge to be absorbed from said negative voltage source; actuating said control means when said resonant circuit means is connected to said negative voltage source to allow a predetermined amount of charge to be absorbed from said positive voltage source; and allowing said charge to be transferred to said resonant circuit means thereby permitting said load to dissipate a predetermined amount of power. - View Dependent Claims (16, 17)
- and control means for controlling the amount of energy drawn from said voltage source, comprising the steps of;
Specification