Power supply for an LCD display
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United States of America Patent
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May 15, 2012
Grant Date -
Feb 12, 2009
app pub date -
Sep 12, 2008
filing date -
Apr 15, 2003
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A power supply system is provided for a multiple lamp LCD panel. In one aspect, the power supply includes a plurality of transformers for driving a plurality of respective CCFLs. The primary sides of each transformer are coupled in series to thereby reduce the stress on each transformer. For LCD panels that include longer CCFLs, a power supply is provided that includes a plurality of transformers for driving a plurality of respective CCFLs. The primary sides of each transformer are coupled in series and each lamp is coupled to two secondary sides of the transformers, thereby reducing the problems associated with longer CCFL tubes. In any of the embodiments, the power supply can be adapted to convert a high voltage DC signal to high voltage AC used to power the lamps.
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