| 摘要 |
A backlight source drive circuit (100), a liquid crystal display device, and a drive method. The backlight source drive circuit (100) comprises an error amplification unit (10) and a drive control unit (20). The error amplification unit (10) is configured to receive a feedback voltage from a backlight source (200) and is used for comparing the feedback voltage with a reference voltage, adjusting the amplification coefficient and the amplification speed for amplifying the comparison result according to the comparison result, and outputting the amplification result as a control signal. The drive control unit (20) is configured to receive the control signal from the error amplification unit (10) and is used for outputting a pulse width modulating dimming signal with a corresponding duty factor according to the control signal, so as to modulate a voltage signal that is output by a power supply (300) to the backlight source (200). The backlight source drive circuit (100) can be used for driving backlight sources (200) of various display apparatuses, can automatically adjust the response speed in different load modes, and has a higher response speed than the prior art, so that the animation display capability of the display apparatuses can be improved indirectly. |
