Power supply of docking system and power failure safe docking system

• US 6,604,199 B1
• Filed: 12/20/1999
• Issued: 08/05/2003
• Est. Priority Date: 01/08/1999
• Status: Expired due to Term

• Current Assignee: Transpacific Avartar, LLC (Transpacific IP Group Limited)
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Lee, Kwan-ho, Yang, Sung-dong
• Primary Examiner(s): Lee, Thomas
• Assistant Examiner(s): Patel, Nitin C.
• Application Number:
  US09/467,011
• Time in Patent Office: 1,324 Days
• Field of Search: 713/300, 713/330, 713/340, 710/303, 710/304
• US Class Current: 713/300
• CPC Class Codes: G06F 1/1632 External expansion units, e.g. docking stations
• CPC Class Codes: G06F 1/266 Arrangements to supply power to external peripherals either directly from the computer or under computer control, e.g. supply of power through the communication port, computer controlled power-strips

Abstract

A power supply of a docking system as an extension device of a notebook computer and a power failure safe docking system are disclosed. The power supply of the docking system used as an extension device of the notebook computer includes an AC-to-DC converter receiving an external AC power supply to convert the received AC power supply to a DC power supply, a docking interrupt switch generating a docking interrupt control signal, when no more power is supplied by the AC-to-DC converter or the notebook computer, or it is detected that docking connection of the notebook computer and the docking system is broken, an analog switch receiving power from the AC-to-DC converter, and stopping connection of a peripheral device controller of the notebook computer to one or more extension peripheral devices of the docking system in accordance with the docking interrupt control signal, and a docking power supply control switch cutting off power of the AC-to-DC converter supplied to the one or more extension peripheral devices. Thus, in a docking system having an AC power supply different from a power supply supplied to the notebook computer, even when a power failure occurs or docking of the notebook computer and the docking system is released, the notebook computer or the docking system is not damaged.

Claims

1. A computer having a docking station that receives a notebook computer, comprising:

an AC-to-DC converter receiving an external AC power supply to convert the received AC power into a DC power supply;

a docking interrupt switch generating a docking interrupt control signal when either no more power is supplied from the AC-to-DC converter and no more power is supplied from the notebook computer, or it is determined that docking connection between said notebook computer and said docking station is faulty;

an analog switch receiving power from said AC-to-DC converter, and disconnecting a peripheral device controller of said notebook computer from an extension peripheral device of said docking station depending upon whether said docking interrupt control signal is generated; and

a docking power supply control switch cutting off power of the AC-to-DC converter supplied to the said extension peripheral device when said docking interrupt control signal is generated.

2. The computer of claim 1, wherein the docking power supply control switch is an electric field effect transistor.

3. The computer of claim 1, said extension peripheral device being either an external monitor, a full-sized keyboard, a pair of speakers, a compact disk read only memory drive, a hard disk drive, a printer, or a port connector.

4. The computer of claim 1, said docking supply control switch cutting off only power supplied to the extension peripheral device in said docking station and not cutting off power supplied to the notebook computer when the docking interrupt control signal is generated.

5. A computer having a docking station that receives a notebook computer, comprising:

a plurality of extension peripheral devices in said docking station;

an AC-to-DC converter located in said docking station receiving an external AC power supply to convert the received AC power supply to a DC power supply for said notebook computer;

a docking interrupt switch generating a docking interrupt control signal when either no more power is supplied from the AC-to-DC converter and no more power is supplied from the notebook computer, or it is determined that docking connection between said notebook computer and said docking station is imperfect;

an analog switch receiving power from the AC-to-DC converter, and disconnecting a peripheral device controller of said notebook computer from said plurality of extension peripheral devices of said docking station depending upon whether said docking interrupt control signal is generated;

a docking power supply control switch cutting off power of the AC-to-DC converter supplied to the said plurality of extension peripheral devices when said docking interrupt control signal is generated; and

a docking connector selectively electrically connecting and separating said notebook computer to or from said docking station.

6. The computer of claim 5, said docking connector selectively connecting and separating a bus connecting a peripheral device controller of said notebook computer to said plurality of extension peripheral devices of said docking station.

7. The computer of claim 6, said docking connector selectively connecting and separating a power supply line for delivering power to said docking station from said notebook computer when said notebook computer is correctly electrically connected to said docking station.

8. The computer of claim 7, said bus being a peripheral component interconnect (PCI) bus and said peripheral device controller of said notebook computer is a host to a PCI bus bridge, and said plurality of extension peripheral devices in said docking station depend on the PCI standard.

9. The computer of claim 7, said docking connector further connects or separates a docking interrupt control line supplying said docking interrupt control signal generated by said docking interrupt switch of said docking station to said notebook computer.

10. The computer of claim 9, said plurality extension peripheral devices include an external monitor, a full-sized keyboard, a pair of speakers, a compact disk read only memory drive, a hard disk drive, a printer, or a port connector.

11. The computer of claim 5, further comprising an input/output port in said docking station operated by receiving power from said notebook computer, wherein said docking connector connects or separates lines connecting an input/output controller of the notebook computer to or from said input/output port of said docking station.

12. The computer of claim 5, said docking supply control switch cutting off only power supplied to the plurality of extension peripheral devices in said docking station and not cutting off power supplied to the notebook computer when the docking interrupt control signal is generated.

13. A method of protecting a plurality of peripheral devices inside a docking station of a computer from power glitches, comprising the steps of:

providing a notebook computer that connects to said docking station;

providing an AC to DC power converter inside said docking station;

determining whether power is being supplied to said docking station from an AC power supply;

determining whether said notebook computer is docked onto said docking station;

determining whether said notebook computer is correctly installed onto said docking station if said notebook computer is docked onto said docking station;

determining if said notebook computer can power said docking station if said notebook computer is correctly installed onto said docking station; and

cutting power to said plurality of peripheral devices if said notebook computer is not correctly installed onto said docking station or both no AC power is being supplied to said docking station and said notebook computer cannot power said docking station.

14. The method of claim 13, said step of cutting power to said plurality of peripheral devices is preceded by the step of generating an interrupt control signal to send to a docking power supply control switch and an analog switch in said docking station.

15. The method of claim 14, said plurality of peripheral devices comprise an external monitor, a full-sized keyboard, speakers, a compact disk read only memory drive, a hard disk drive, a printer, and port connectors.

16. The method of claim 13, said cutting power step cutting power only to being supplied the plurality of peripheral devices in said docking station while no power is cut off to the notebook computer.