Patent ID: 8704449

Claim:
An LED backlight driving circuit, comprising: a power supply module, an LED lightbar coupled with an output terminal of the power supply module, a dimming module coupled with an output terminal of the LED lightbar, wherein said dimming module comprises a dimming switch tube; and said dimming switch tube is in series connection with said LED lightbar; wherein said LED backlight driving circuit further comprises a transfer switch; a first input terminal of said transfer switch is coupled to the output terminal of said LED lightbar, and a second input terminal of the transfer switch is coupled to an independent reference feedback voltage; the output terminal of the transfer switch is coupled to the power supply module; said transfer switch is switched to said first input terminal when the dimming module is ON, the transfer switch is switched to said second input terminal when the dimming module is OFF, and the power supply module is kept being conducted by the feedback voltage.