LED driver
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United States of America Patent
Stats
-
Jul 1, 2008
Grant Date -
Aug 17, 2006
app pub date -
Nov 1, 2005
filing date -
Feb 15, 2005
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The present invention relates to an LED driver for driving light emitting diodes. The LED driver comprises a linear mode driver to increase and decrease a linear mode current to make a current flow in the LED at a predetermined target current value and output it to the LED; and a switch mode driver to increase and decrease a switch mode current depending on whether the linear mode current exceeds a predetermined reference current value and output it to the LED. Thus, the present invention provides an LED driver having high power efficiency and light efficiency and minimal distortions of a driving current.
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