Voltage adjusting circuit and all-in-one computer including the same

摘要

A voltage adjusting circuit includes a voltage regulator module, a control chip, a platform controller hub (PCH), a basic input-output system (BIOS), a number of switching units, and a number of resistors. The voltage adjusting circuit is utilized to receive a voltage signal to supply a working voltage to a liquid crystal display (LCD). The voltage adjusting circuit controls switching units to turn on or turn off, and changes the current of the control chip, and further outputs different voltages to different LCDs. The disclosure further provides an all-in-one computer including the voltage adjusting circuit.

主权项

1. A voltage adjusting circuit comprising:
a voltage regulator module (VRM) comprising an input terminal configured for receiving a first voltage, an output terminal connected to a liquid crystal display (LCD), and a control terminal; a control chip comprising a plurality of sensor terminals connected to the LCD to sense currents of the LCD, and a slave terminal connected to the control terminal of the VRM to output a control signal to the VRM, the VRM outputting working voltages to the LCD according to the control signal; a platform controller hub (PCH) comprising a plurality of input output pins; a basic input-output system (BIOS) coupled to the PCH for controlling output signals of the input output pins of the PCH according to a rated voltage of the LCD; and a plurality of switching units, wherein each of the switching units comprises a first terminal, a second terminal, and a control terminal, the first terminals of the plurality of switching units are respectively coupled to the plurality of sensor terminals of the control chip, the second terminal of the plurality of switching units are grounded through a first resistor, and the control terminals of the plurality of switching units are respectively coupled to the input/output pins of the PCH.