LED BACKLIGHT DRIVING CIRCUIT, LIQUID CRYSTAL DISPLAY DEVICE, AND DRIVING CIRCUIT

摘要

An LED backlight driving circuit and a driving method therefor. The driving circuit comprises a power supply module, an LED light strip coupled with an output end of the power supply module, a dimming module coupled with an output end of the LED light strip, and a toggle switch. A first input end of the toggle switch is coupled with the output end of the LED light strip, while a second input end is coupled with a feedback voltage (Vmin), and an output end is coupled with the power supply module. The toggle switch switches to the first input end when the dimming module is turned on, and switches to the second input end when the dimming module is turned off. The present invention allows an LED to work normally in a short dimming cycle.