Low noise method and apparatus for driving electroluminescent panels
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United States of America Patent
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Apr 29, 2003
Issued Date -
N/A
app pub date -
Sep 19, 2001
filing date -
Sep 19, 2001
priority date (Note) -
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Abstract
A low noise method and apparatus for driving electroluminescent (EL) panels provides reduction in EL panel noise, and in the preferred embodiment, voltage compensation as the EL panel ages. The output of a high voltage power supply is applied to the EL panel through a circuit having an optimized time-constant, producing a waveform that reduces EL panel vibration. Additionally, if the time constant is derived in part from the capacitance of the EL panel, the time constant may be chosen such that aging of the EL panel maintains the time constant in the proper range to maintain noise reduction over the life of the panel and compensate for brightness reduction due to aging of the EL panel.
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