Power supply circuit and display apparatus

摘要

A power supply circuit and display apparatus, comprising power source (1), charging/discharging module (2), detecting module (3), the detecting module detects detecting parameter on power-supply path, feeds back corresponding mode signal to the power source according to the detected detecting parameter, and outputs preset operation voltage to load (4); the power source receives the mode signal fed back from the detecting module, outputs power supply voltage corresponding to the mode signal, and charges the charging/discharging module when the mode signal is the low power signal; and the charging/discharging module is discharged to the detecting module when the power source outputs the supply voltage corresponding to the high power signal, and is charged when the power source outputs the supply voltage corresponding to the low power signal. The circuit can avoid effectively that the consumption of the power source fluctuates significantly with the power consumption changing of the load thereby the power source operates stably.

主权项

1. A power supply circuit comprising:
a power source for outputting a power supply voltage; a detecting module for detecting a detecting parameter on a power supply path, feeding back a corresponding mode signal to the power source according to the detected detecting parameter, and outputting a preset operation voltage to a load, the mode signal comprising a low power signal and a high power signal; a charging/discharging module for discharging to the detecting module when the power source outputs the power supply voltage corresponding to the high power signal, and being charged when the power source outputs the power supply voltage corresponding to the low power signal, wherein the power source is connected to the detecting module, and the charging/discharging module is connected to the power source and the detecting module respectively; and the power source receives the mode signal fed back from the detecting module, outputs the power supply voltage corresponding to the mode signal according to the mode signal, and charges the charging/discharging module when the mode signal is the low power signal.