| 摘要 |
A voltage compensation circuit and voltage compensation method based thereon. The voltage compensation circuit comprises a power management chip, a feedback circuit, and a control circuit. A gate drive voltage (VGH) is connected to an input terminal of the control circuit, a first terminal of a fifth resistor (R5) and an output terminal (Output) of the feedback circuit. A second terminal of the fifth resistor (R5) is connected to a non-inverting input (V1) of a voltage comparator, a first terminal of a sixth resistor (R6) and a first terminal of a first capacitor (C1). A second terminal of the sixth resistor (R6) and a second terminal of the first capacitor (C1) are connected to a ground. An output terminal (Vout) of the voltage comparator is connected to a gate of a first field effect transistor (Q1). A source of the first field effect transistor (Q1) is connected to a first output terminal of the control circuit. A drain of the first field effect transistor (Q1) is connected to a second output terminal of the control circuit and a second input terminal (Input2) of the feedback circuit. The first output terminal of the control circuit is connected to a first input terminal (Input1) of the feedback circuit and an output terminal (FB) of the power management chip. The embodiment of the invention can enhance a screen display effect of a liquid crystal display. |
