Patent ID: 6345364
Filing Date: 2002-02-05
Classification: G06F,G09G,Y02D

Abstract:
A power supply of display apparatus having universal serial bus (USB) hub, the power supply comprising:a rectifier converting an AC input voltage into a DC output voltage; a first power supply circuitry for generating regulated output voltage required to energize a display when it receives the rectifier output voltage; a second power supply circuitry for supplying power to the USB hub, in which the second power supply circuitry receives said DC output voltage from said rectifier as input to said second power supply circuitry; a power switch disposed between the output of the rectifier and an input of the first power supply circuitry; and a controller outputting a control signal that switches said power switch so that no power is supplied to said first power supply circuitry in response to display power management signals input to said controller, said display power management signals corresponding to a power-off mode.