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Sequential low-voltage detecting method for multistring LED BLU circuit

Sequential low-voltage detecting method for multistring LED BLU circuit

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A new low-voltage detecting method for a multichannel LED back lighting unit is proposed. The proposed method detects the lowest voltage drops among the multichannel LED strings with a reduced number of devices, and it provides feedback voltage to control the stages of the boost converter for minimising the power consumption in the LED driving circuit.

References

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      • Chen, H., Sung, J., Ha, T., Park, Y., Hong, C.: `Backlight local dimming algorithm for high contrast LCD TV', ASID’06 Dig., October 2006, New Delhi, India, p. 168–171.
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      • Burgyan, L., Prinz, F.: `High efficiency LED driver', United States Patent 6690146, February 2004.
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