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US 7,009,346 B2Granted
Driving an EL panel without DC bias
AssigneeWorld Properties, Inc.
InventorsMahyar Vahabzadeh, Robert A. Kimball, William A. Coghlan
Life of this patent
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Abstract
An inverter is coupled to an EL lamp by a high pass filter including a series capacitor and a shunt resistor. The resistor is coupled in parallel with the EL lamp. The high pass filter has a time constant greater than 0.005 seconds and the capacitor has a capacitance at least ten times the capacitance of the EL lamp.
Claims4
In a power supply for driving an EL panel from an inverter, said panel including at least one EL lamp, the improvement comprising:
- a high pass filter coupling said inverter to said EL lamp to eliminate DC bias on the EL lamp;
- wherein said high pass filter includes a series capacitor and a shunt resistor.
Dependencies are inferred from the claim text.