Method and device for driving LED-based backlight module
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United States of America Patent
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N/A
Issued Date -
Dec 20, 2007
app pub date -
Jun 16, 2006
filing date -
Jun 16, 2006
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A device and a related device for driving LED-based, direct-lit backlight modules are provided. The device contains a driver controller which receives the timing signals from the display device and a number of drivers which is series-connected or parallel-connected to the driver controller. Each of the drivers is activated by the driver controller to drive a number of LEDs of the backlight module by current pulses. Each driver automatically detects its output current or voltage and increases the duty cycle of the current pulses so as to compensate the brightness loss from out-of-work LEDs. The method delivers pulses of different pulse counts in a fixed period of time (e.g., a frame time) to the red-, green-, and blue-light LEDs so as to achieve a constant color temperature based on their different response to the temperature.
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