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US 6,320,323 B1Granted
EL driver with lamp discharge monitor
AssigneeDurel Corporation
InventorsBrian Jeffrey Buell, Grady M. Wood
Life of this patent
Estimating the term…
Abstract
A driver for an EL lamp includes a voltage detector coupled to the lamp for monitoring the voltage across the lamp and providing an indication of when the lamp is substantially discharged.
Claims6
A method for driving an EL lamp from a battery, said method comprising the steps of:
- charging the EL lamp to a first polarity during a first period;
- discharging the EL lamp during a second period;
- charging the EL lamp to a second polarity during a third period;
- discharging the EL lamp during a fourth period;
- while monitoring the voltage on the EL lamp and initiating the next charging step when the voltage on the EL lamp is less than a predetermined magnitude.
2 more elements
In an inverter for an electroluminescent lamp, the inverter including a boost circuit and means for reversing the polarity of the voltage applied to the lamp, the improvement comprising:
- a first voltage detector coupled to the lamp for monitoring the voltage across the lamp and providing an indication of when the lamp is substantially discharged.
Dependencies are inferred from the claim text.