Backlight driver, display apparatus having the same and method of driving backlight
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United States of America Patent
Stats
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Mar 8, 2011
Grant Date -
Mar 6, 2008
app pub date -
Aug 29, 2007
filing date -
Aug 29, 2006
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A backlight driver includes an inverter controller, a dimming signal compensator and an inverter. The inverter controller generates a pulse width modulation signal in response to a control signal and outputs a first dimming signal that represents a duty ratio of the pulse width modulation signal and a second dimming signal that represents an amplitude of the pulse width modulation signal. The dimming signal compensator receives the first and second dimming signals, compares the first dimming signal with a predetermined reference duty ratio and compensates the second dimming signal in accordance with the compared result to generate a third dimming signal. The inverter outputs a driving voltage to drive the backlight and varies a voltage level of the driving voltage in response to the first and third dimming signals to control a brightness of the backlight.
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