| 摘要 |
<p>A backlight drive control device and method of a mobile phone display screen is disclosed. The device comprises a backlight drive circuit of the display screen and a control module, wherein, the backlight drive circuit of the display screen comprises an inductance, a diode, and a capacitance connected in turn between the positive terminal and the negative terminal of a power supply voltage, and also comprises a first switch tube connected between a connecting point locating between the inductance and the positive terminal of the diode and the negative terminal of the power supply voltage; the negative terminal of the diode is connected as the positive terminal of the drive voltage to the positive terminals of a plurality of light emitting diodes; the negative terminal of the drive voltage outputted by the control module is connected to the negative terminals of the plurality of light emitting diodes, and the control module is set to control the turn-on and the turn-off of the first switch tube through a first output port.</p> |
