LED driving circuit and backlight module
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United States of America Patent
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-
Apr 23, 2013
Grant Date -
Dec 2, 2010
app pub date -
May 25, 2010
filing date -
May 27, 2009
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A LED driving circuit and a backlight module using the same are disclosed. The LED driving circuit comprises a LED module and a current controlling unit. The LED module has a plurality of the LED strings, each having a driving terminal. The current controlling unit has a plurality of current balancing terminal coupled to the driving terminal, for balancing the currents flowing through the LED strings. The current controlling unit receives a mode switch signal, controls the amount of the currents of the LED strings about a first current value when the mode switch signal represent a first mode, and controls the amount of the currents of the LED strings about a second current value when the mode switch signal represent a second mode.
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