BOOST CIRCUIT AND DRIVE METHOD THEREFOR, BACKLIGHT MODULE AND DISPLAY DEVICE

摘要

A boost circuit and a drive method therefor, a backlight module and a display device. The boost circuit comprises: a coupling inductor comprising a first inductor (L1) and a second inductor (L2), a first thin-film transistor (Q1), a second thin-film transistor (Q2), a first rectifier diode (D1), a second rectifier diode (D2), a first capacitor (C1) and a second capacitor (C2). A first end of the first inductor (L1) is connected to a voltage input end, and a second end of the first inductor (L1) is connected to a source electrode of the second thin-film transistor (Q2), a positive electrode of the first rectifier diode (D1) and a negative electrode of the second rectifier diode (D2); a first end of the second inductor (L2) is connected to the voltage input end, and a second end of the second inductor (L2) is connected to a source electrode of the first thin-film transistor (Q1), a second end of the first capacitor (C1) and a first end of the second capacitor (C2); and a gate electrode of the first and the second thin-film transistors (Q1, Q2) are used for receiving a time-sequence drive signal for controlling the ON or OFF of the thin-film transistors. The boost circuit can achieve a high boost ratio, provide high-quality backlight and guarantee the display quality of the display device.