Power control device and method of controlling power of peripheral devices of a computer system using a universal serial bus (USB) hub
US6105143A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 22, 1998 |
| Grant date | Aug 15, 2000 |
| Priority date | — |
| Expiry date | Apr 22, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02D10/00
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A power control device of a computer system uses a universal serial bus (USB) hub for power control of a display monitor. The power control device includes: a rectifying section for converting an AC power of the display device into a DC voltage; a main SMPS (Switching Mode Power Supply) for supplying power to the display monitor after the DC voltage is switched and rectified; a microcomputer for determining the status of a power save mode to control the switching operation of the main SMPS; an auxiliary SMPS for supplying the power to the microcomputer when no power has been supplied from the USB hub; an auxiliary OFF controller for interrupting the operation of the auxiliary SMPS when the power has been applied from the USB hub; and an OFF controller for interrupting the operation of the main SMPS to execute a power OFF mode according to a DPMS.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.