| 摘要 |
<p>An LED backlight driving circuit (1), a driving method therefor, and a liquid crystal display apparatus. The LED backlight driving circuit (1) comprises a power supply module (10), an LED lamp strip (20) coupled to the power supply module (10), and a constant current driving chip (30) coupled to a control end of the power supply module (10) and a negative end of the LED lamp strip (20). The constant current driving chip (30) comprises a PWM dimming module (32) connected serially to the negative end of the LED lamp strip (20). The LED lamp strip (20) is also connected serially to a controllable switch module (40) in linkage with the PWM dimming module (32). The controllable switch module (40) is turned off when the PWM dimming module (32) is turned off or before the PWM dimming module (32) is turned off, and is turned on when the PWM dimming module (32) is turned on or after the PWM dimming module (32) is turned on.</p> |
