Electrical computers and digital processing systems: support – Computer power control
Reexamination Certificate
2005-08-12
2008-11-11
Chen, Tse (Department: 2116)
Electrical computers and digital processing systems: support
Computer power control
C713S320000
Reexamination Certificate
active
07451328
ABSTRACT:
A display device (20) with USB connectivity connects with one or more USB devices (30) via one or more USB ports (207). The display device includes a power module (201), a display controller (202), a switching circuit (203), and an OR gate circuit (204). The display controller connects to a host (10), and is used to control the switching circuit according to a current status of the host. When the host is in a power-saving mode or a power off mode, the display controller controls the switching circuit to be on. Accordingly, the OR gate circuit electrically couples the power module to the USB ports. The display device thus powers the USB devices. If the host is in a normal mode, the display controller controls the switching circuit to be off. Accordingly, the OR gate circuit electrically couples the host to the USB ports. The host thus powers the USB devices.
REFERENCES:
patent: 5715465 (1998-02-01), Savage et al.
patent: 5938770 (1999-08-01), Kim
patent: 6049880 (2000-04-01), Song
patent: 2003/0107566 (2003-06-01), Shin et al.
Chen Tse
Hon Hai Precision Industry Co. Ltd.
Morris Manning & Martin LLP
Stoynov Stefan
Tingkang Xia Tim
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