WO2014015513A1 - Device and method for switching between sleep mode and working mode - Google Patents

Device and method for switching between sleep mode and working mode Download PDF

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Publication number
WO2014015513A1
WO2014015513A1 PCT/CN2012/079261 CN2012079261W WO2014015513A1 WO 2014015513 A1 WO2014015513 A1 WO 2014015513A1 CN 2012079261 W CN2012079261 W CN 2012079261W WO 2014015513 A1 WO2014015513 A1 WO 2014015513A1
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WO
WIPO (PCT)
Prior art keywords
power supply
electronic device
switching
volatile memory
memory device
Prior art date
Application number
PCT/CN2012/079261
Other languages
French (fr)
Inventor
Yingjiang ZHU
Original Assignee
Harman International Industries, Incorporated
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Harman International Industries, Incorporated filed Critical Harman International Industries, Incorporated
Priority to PCT/CN2012/079261 priority Critical patent/WO2014015513A1/en
Publication of WO2014015513A1 publication Critical patent/WO2014015513A1/en

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof
    • G06F1/32—Means for saving power
    • G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
    • G06F1/3234—Power saving characterised by the action undertaken
    • G06F1/325—Power saving in peripheral device
    • G06F1/3275—Power saving in memory, e.g. RAM, cache
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
    • G06F1/26—Power supply means, e.g. regulation thereof
    • G06F1/32—Means for saving power
    • G06F1/3203—Power management, i.e. event-based initiation of a power-saving mode
    • G06F1/3234—Power saving characterised by the action undertaken
    • G06F1/3296—Power saving characterised by the action undertaken by lowering the supply or operating voltage
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management

Definitions

  • the present disclosure generally relates to a power management method for electronic devices, and particularly to a device and a method for switching an electronic device between sleep mode and working mode.
  • an electronic device capable of switching between sleep mode and working mode.
  • the electronic device includes a volatile memory device and a power switching device.
  • the volatile memory device is coupled to the power switching device, and receives power through the power switching device.
  • the power switching device is configured to couple the volatile memory device to a local power supply when the electronic device is in working mode such that the volatile memory device is powered by the local power supply, and couple the volatile memory device to a network power supply when the electronic device is in sleep mode such that the volatile memory device is powered by the network power supply.
  • an electronic device capable of switching between sleep mode and working mode.
  • the electronic device includes a volatile memory device and a power switching device.
  • the volatile memory device is coupled to the power switching device, and receives power through the power switching device.
  • the power switching device is configured to switch from a local power supply to a network power supply when the electronic device receives a sleep instruction, and switch from the network power supply to the local power supply when the client device receives a wake-up instruction.
  • a system for switching a client device in the system between sleep mode and working mode through network includes a host device and a client device connected to a same network.
  • the client device includes a volatile memory device and a power switching device.
  • the volatile memory device is coupled to the power switching device, and receives power through the power switching device.
  • the host device is configured to send a sleep instruction or a wake-up instruction to the client device through the network. If a sleep instruction is received by the client device, the power switching device is configured to switch the volatile memory device from a local power supply to a network power supply. If a wake-up instruction is received by the client device, the power switching device is configured to switch the volatile memory device from the network power supply to the local power supply.
  • a method for switching an electronic device from working mode to sleep mode includes: receiving a sleep instruction; coupling a volatile memory device of the electronic device to a network power supply; and shutting down a local power supply which powers the electronic device before it is switched to sleep mode.
  • a method for switching an electronic device from working mode to sleep mode includes: receiving a sleep instruction; switching a volatile memory device of the electronic device from a local power supply, which powers the electronic device before it is switched to sleep mode, to a network power supply; and shutting down the local power supply.
  • a method for switching an electronic device from sleep mode to working mode includes: receiving a wake-up instruction; turning on a local power supply; uncoupling a volatile memory device of the client device from a network power supply; and coupling the volatile memory device to the local power supply.
  • a method for switching an electronic device from sleep mode to working mode includes: receiving a wake-up instruction; turning on a local power supply; and switching a volatile memory device of the electronic device from a network power supply to the local power supply.
  • the network power supply may be power on Ethernet.
  • FIG. 1 illustrates a schematic block diagram of an electronic device 100 capable of switching between sleep mode and working mode according to one embodiment of the present disclosure
  • FIG. 2 illustrates a schematic diagram of a system 200 for switching client devices 230,250 and 270 between sleep mode and working mode according to one embodiment of the present disclosure
  • FIG. 3 illustrates a schematic flow chart of a method S300 for switching an electronic device from working mode to sleep mode according to one embodiment of the present disclosure
  • FIG. 4 illustrates a schematic flow chart of a method S400 for switching an electronic device from working mode to sleep mode according to one embodiment of the present disclosure
  • FIG. 5 illustrates a schematic flow chart of a method S500 for switching an electronic device from sleep mode to working mode according to one embodiment of the present disclosure
  • FIG. 6 illustrates a schematic flow chart of a method S600 for switching an electronic device from sleep mode to working mode according to one embodiment of the present disclosure.
  • FIG. 1 illustrates a schematic block diagram of an electronic device 100 capable of switching between sleep mode and working mode according to one embodiment of the present disclosure.
  • an electronic device 100 includes a volatile memory device 110 and a power switching device 130.
  • the volatile memory device 110 is coupled to the power switching device 130, and receives power through the power switching device 130.
  • the term “sleep mode” means a power saving mode of an electronic device, under which a volatile memory device keeps the data contained therein when the electronic device is switched from working mode to sleep mode.
  • the electronic device 100 may be a computer, a speaker system, a printer, a camera, or the like.
  • the electronic device 100 may be connected to a network (not shown in FIG. 1 ).
  • the network may be Ethernet.
  • the power switching device 130 is configured to switch the volatile memory device 110 from a local power supply to a network power supply. Therefore, under sleep mode, the volatile memory device 110 is coupled to the network power supply through the power switching device 130 to ensure that the data can be kept in the volatile memory device 110; and the local power supply is shut down to save power.
  • the power switching device 130 is configured switch the volatile memory device 110 from the network power supply to the local power supply. Therefore, under working mode, the volatile memory device 110 is coupled to the local power supply through the power switching device 130 to ensure that the electronic device 100 can operate normally; and the network power supply is shut down.
  • the network power supply may be power on Ethernet.
  • Power on Ethernet is an IEEE (Institute of Electrical and Electronic Engineers) standard which describes a system to provide electrical power on Ethernet cable.
  • the electrical power is supplied over Ethernet cables and may come from a power supply within an Ethernet device such as an Ethernet switch.
  • the power switching device 130 may be a three-phase switching circuit integrated on a network interface card (not shown in FIG. 1 ) of the electronic device 100.
  • the three-phase switching circuit includes a first end coupled to the volatile memory device 110, a second end coupled to the network power supply and a third end coupled to the local power supply.
  • In sleep mode power from the network power supply is supplied to the volatile memory device 110 to keep the data therein.
  • In working mode power from the local power supply is supplied not only to the volatile memory device 110 but also to other components (not shown in FIG. 1 ) of the electronic device 100, so that the electronic device 100 may operate normally.
  • FIG. 2 illustrates a schematic diagram of a system 200 for switching client devices 230,250 and 270 between sleep mode and working mode according to one embodiment of the present disclosure.
  • a system 200 includes a host device 210 and a plurality of client devices 230, 250 and 270.
  • the host and client devices are connected to a same network through a switch 290.
  • the host device 210 is configured to send a sleep or wake-up instruction to any of the client devices 230, 250 and 270 though the network.
  • Each of the client devices 230, 250 and 270 includes a volatile memory device and a power switching device (not shown in FIG. 2).
  • the client device 230 receives a sleep instruction, its power switching device is configured to switch its volatile memory device from a local power supply to a network power supply which may be provided by the switch 290; if the client device 230 receives a wake-up instruction, its power switching device is configured to switch its volatile memory device from the network power supply to the local power supply.
  • the system may be applied in a vehicular system, a music hall, a home media system, or any other environments to achieve a centralized power management.
  • Embodiments of the present disclosure further provide methods for switching an electronic device between sleep mode and working mode.
  • FIG. 3 illustrates a schematic flow chart of a method S300 for switching an electronic device from working mode to sleep mode.
  • the method S300 includes: in S301 , receiving a sleep instruction; in S303, coupling a volatile memory device of the client device to a network power supply; and in S305, shutting down a local power supply which powers the electronic device before it is switched to sleep mode.
  • a sleep instruction is received by the electronic device.
  • the sleep instruction may be sent by a user operating the electronic device, or may be transmitted from another electronic device through a network.
  • the electronic device may analyze and identify the sleep instruction to check whether to execute the sleep instruction.
  • a volatile memory device of the electronic device is coupled to a network power supply. This may be achieved by a power switching device of the electronic device.
  • the network power supply may be power on Ethernet.
  • a local power supply which powers the electronic device before it is switched to sleep mode is turn off. This may also be achieved by the power switching device.
  • FIG. 4 illustrates a schematic flow chart of a method S400 for switching an electronic device from working mode to sleep mode.
  • the method S400 includes: in S401 , receiving a sleep instruction; in S403, switching a volatile memory device of the electronic device from a local power supply, which powers the electronic device before it is switched to sleep mode, to a network power supply; and in S405, shutting down the local power supply.
  • Detail description of the method S400 is omitted herein, as it can be referred to above description of S300.
  • FIG. 5 illustrates a schematic flow chart of a method S500 for switching an electronic device from sleep mode to working mode.
  • the method S500 includes: in S501 , receiving a wake-up instruction; in S503, turning on a local power supply; in S505, uncoupling a volatile memory device of the electronic device from a network power supply; and in S507, coupling the volatile memory device to the local power supply.
  • a wake-up instruction is received by the electronic device.
  • the wake-up instruction may be sent by a user operating the electronic device, or may be transmitted from another electronic device through a network.
  • the electronic device may analyze and identify the wake-up instruction to check whether to execute the wake-up instruction.
  • a local power supply is turn on.
  • the local power supply is turn on to prepare for powering the electronic device in working mode. This may be achieved by a power switching device of the electronic device.
  • a volatile memory device of the electronic device is uncoupled from a network power supply.
  • the network power supply may be power on Ethernet, which powers the volatile memory device to keep the data therein when the electronic device is in sleep mode. This may also be achieved by the power switching device.
  • the volatile memory device is coupled to the local power supply. Therefore, the electronic device is powered by the local power supply to support its normal working and is switched to working mode. This may also be achieved by the power switching device.
  • FIG. 6 illustrates a schematic flow chart of a method S600 for switching an electronic device from sleep mode to working mode.
  • the method S600 includes: in S601 , receiving a wake-up instruction; in S603, turning on a local power supply coupled to the electronic device; and in S605, switching a volatile memory device of the electronic device from a network power supply to the local power supply. Detail description of the method S600 is omitted herein, as it can be referred to above description of S500.

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  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
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Abstract

An electronic device capable of switching between sleep mode and working mode is provided. The electronic device includes a volatile memory device and a power switching device. The volatile memory device is coupled to the power switching device, and receives power through the power switching device. The power switching device is configured to couple the volatile memory device to a local power supply when the electronic device is in working mode such that the volatile memory device is powered by the local power supply, and couple the volatile memory device to a network power supply when the electronic device is in sleep mode such that the volatile memory device is powered by the network power supply. There is no need for the electronic device to have a switching power supply to power its volatile memory device under sleep mode, which saves more power.

Description

DEVICE AND METHOD FOR SWITCHING BETWEEN SLEEP MODE AND WORKING MODE
TECHNICAL FIELD
[0001] The present disclosure generally relates to a power management method for electronic devices, and particularly to a device and a method for switching an electronic device between sleep mode and working mode.
BACKGROUND
[0002] Generally, electronic devices, such as computers, printers and the like, have a variety of power modes to save power. Among them, sleep (also called stand-by) mode is commonly applied.
[0003] When an electronic device receives a sleep instruction, most of its components are powered off except its volatile memory device, so that data can be maintained in the volatile memory device when the electronic device is in sleep mode. Conventionally, in sleep mode, the volatile memory device is powered by a local power supply, such as a switching power supply contained in the electronic device. However, the switching power supply itself consumes certain power when it works. The power consumed by the switching power supply itself may be even more than the power consumed by the volatile memory device under sleep mode. It is not cost-efficient and environment friendly to power a volatile memory device under sleep mode using a switching power supply. Therefore, there is need to provide a new method for switching an electronic device between sleep mode and working mode.
SUMMARY [0004] In one embodiment of the present disclosure, an electronic device capable of switching between sleep mode and working mode is provided. The electronic device includes a volatile memory device and a power switching device. The volatile memory device is coupled to the power switching device, and receives power through the power switching device. The power switching device is configured to couple the volatile memory device to a local power supply when the electronic device is in working mode such that the volatile memory device is powered by the local power supply, and couple the volatile memory device to a network power supply when the electronic device is in sleep mode such that the volatile memory device is powered by the network power supply.
[0005] In one embodiment of the present disclosure, an electronic device capable of switching between sleep mode and working mode is provided. The electronic device includes a volatile memory device and a power switching device. The volatile memory device is coupled to the power switching device, and receives power through the power switching device. The power switching device is configured to switch from a local power supply to a network power supply when the electronic device receives a sleep instruction, and switch from the network power supply to the local power supply when the client device receives a wake-up instruction.
[0006] In another embodiment of the present disclosure, a system for switching a client device in the system between sleep mode and working mode through network is provided. The system includes a host device and a client device connected to a same network. The client device includes a volatile memory device and a power switching device. The volatile memory device is coupled to the power switching device, and receives power through the power switching device. The host device is configured to send a sleep instruction or a wake-up instruction to the client device through the network. If a sleep instruction is received by the client device, the power switching device is configured to switch the volatile memory device from a local power supply to a network power supply. If a wake-up instruction is received by the client device, the power switching device is configured to switch the volatile memory device from the network power supply to the local power supply.
[0007] In another embodiment of the present disclosure, a method for switching an electronic device from working mode to sleep mode is provided. The method includes: receiving a sleep instruction; coupling a volatile memory device of the electronic device to a network power supply; and shutting down a local power supply which powers the electronic device before it is switched to sleep mode.
[0008] In another embodiment of the present disclosure, a method for switching an electronic device from working mode to sleep mode is provided. The method includes: receiving a sleep instruction; switching a volatile memory device of the electronic device from a local power supply, which powers the electronic device before it is switched to sleep mode, to a network power supply; and shutting down the local power supply.
[0009] In another embodiment of the present disclosure, a method for switching an electronic device from sleep mode to working mode is provided. The method includes: receiving a wake-up instruction; turning on a local power supply; uncoupling a volatile memory device of the client device from a network power supply; and coupling the volatile memory device to the local power supply.
[0010] In another embodiment of the present disclosure, a method for switching an electronic device from sleep mode to working mode is provided. The method includes: receiving a wake-up instruction; turning on a local power supply; and switching a volatile memory device of the electronic device from a network power supply to the local power supply.
[0011] In some embodiments, the network power supply may be power on Ethernet.
[0012] By employing the methods and devices of the present disclosure, it is not necessary for an electronic device to have a switching power supply to power its volatile memory device under sleep mode, which saves more power. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] The foregoing and other features of the present disclosure will become more fully apparent from the following description and appended claims, taken in conjunction with the accompanying drawings. Understanding that these drawings depict only several embodiments in accordance with the disclosure and are, therefore, not to be considered limiting of its scope, the disclosure will be described with additional specificity and detail through use of the accompanying drawings.
[0014] FIG. 1 illustrates a schematic block diagram of an electronic device 100 capable of switching between sleep mode and working mode according to one embodiment of the present disclosure;
[0015] FIG. 2 illustrates a schematic diagram of a system 200 for switching client devices 230,250 and 270 between sleep mode and working mode according to one embodiment of the present disclosure;
[0016] FIG. 3 illustrates a schematic flow chart of a method S300 for switching an electronic device from working mode to sleep mode according to one embodiment of the present disclosure;
[0017] FIG. 4 illustrates a schematic flow chart of a method S400 for switching an electronic device from working mode to sleep mode according to one embodiment of the present disclosure;
[0018] FIG. 5 illustrates a schematic flow chart of a method S500 for switching an electronic device from sleep mode to working mode according to one embodiment of the present disclosure; and
[0019] FIG. 6 illustrates a schematic flow chart of a method S600 for switching an electronic device from sleep mode to working mode according to one embodiment of the present disclosure. DETAILED DESCRIPTION
[0020] In the following detailed description, reference is made to the accompanying drawings, which form a part hereof. In the drawings, similar symbols typically identify similar components, unless context dictates otherwise. The illustrative embodiments described in the detailed description, drawings, and claims are not meant to be limiting. Other embodiments may be utilized, and other changes may be made, without departing from the spirit or scope of the subject matter presented here. It will be readily understood that the aspects of the present disclosure, as generally described herein, and illustrated in the Figures, can be arranged, substituted, combined, and designed in a wide variety of different configurations, all of which are explicitly contemplated and make part of this disclosure.
[0021] FIG. 1 illustrates a schematic block diagram of an electronic device 100 capable of switching between sleep mode and working mode according to one embodiment of the present disclosure. As shown in FIG. 1 , an electronic device 100 includes a volatile memory device 110 and a power switching device 130. The volatile memory device 110 is coupled to the power switching device 130, and receives power through the power switching device 130.
[0022] It should be noted that, in some embodiments of the present disclosure, the term "sleep mode" means a power saving mode of an electronic device, under which a volatile memory device keeps the data contained therein when the electronic device is switched from working mode to sleep mode.
[0023] The electronic device 100 may be a computer, a speaker system, a printer, a camera, or the like. The electronic device 100 may be connected to a network (not shown in FIG. 1 ). In some illustrative embodiments, the network may be Ethernet.
[0024] When a sleep instruction is received by the electronic device 100, the power switching device 130 is configured to switch the volatile memory device 110 from a local power supply to a network power supply. Therefore, under sleep mode, the volatile memory device 110 is coupled to the network power supply through the power switching device 130 to ensure that the data can be kept in the volatile memory device 110; and the local power supply is shut down to save power.
[0025] When a wake-up instruction is received by the electronic device 100, the power switching device 130 is configured switch the volatile memory device 110 from the network power supply to the local power supply. Therefore, under working mode, the volatile memory device 110 is coupled to the local power supply through the power switching device 130 to ensure that the electronic device 100 can operate normally; and the network power supply is shut down.
[0026] In some illustrated embodiments, the network power supply may be power on Ethernet. Power on Ethernet is an IEEE (Institute of Electrical and Electronic Engineers) standard which describes a system to provide electrical power on Ethernet cable. The electrical power is supplied over Ethernet cables and may come from a power supply within an Ethernet device such as an Ethernet switch.
[0027] In some illustrated embodiments, the power switching device 130 may be a three-phase switching circuit integrated on a network interface card (not shown in FIG. 1 ) of the electronic device 100. Referring again to FIG. 1 , the three-phase switching circuit includes a first end coupled to the volatile memory device 110, a second end coupled to the network power supply and a third end coupled to the local power supply. In sleep mode, power from the network power supply is supplied to the volatile memory device 110 to keep the data therein. It should be noted that, in working mode, power from the local power supply is supplied not only to the volatile memory device 110 but also to other components (not shown in FIG. 1 ) of the electronic device 100, so that the electronic device 100 may operate normally.
[0028] In some illustrative embodiments, a sleep instruction and a wake-up instruction may be received by the electronic device 100 through a network from another electronic device. Therefore, remote control can be achieved. [0029] FIG. 2 illustrates a schematic diagram of a system 200 for switching client devices 230,250 and 270 between sleep mode and working mode according to one embodiment of the present disclosure.
[0030] As shown in FIG. 2, a system 200 includes a host device 210 and a plurality of client devices 230, 250 and 270. The host and client devices are connected to a same network through a switch 290. The host device 210 is configured to send a sleep or wake-up instruction to any of the client devices 230, 250 and 270 though the network. Each of the client devices 230, 250 and 270 includes a volatile memory device and a power switching device (not shown in FIG. 2). For example, if the client device 230 receives a sleep instruction, its power switching device is configured to switch its volatile memory device from a local power supply to a network power supply which may be provided by the switch 290; if the client device 230 receives a wake-up instruction, its power switching device is configured to switch its volatile memory device from the network power supply to the local power supply.
[0031] The system may be applied in a vehicular system, a music hall, a home media system, or any other environments to achieve a centralized power management.
[0032] Embodiments of the present disclosure further provide methods for switching an electronic device between sleep mode and working mode.
[0033] FIG. 3 illustrates a schematic flow chart of a method S300 for switching an electronic device from working mode to sleep mode. The method S300 includes: in S301 , receiving a sleep instruction; in S303, coupling a volatile memory device of the client device to a network power supply; and in S305, shutting down a local power supply which powers the electronic device before it is switched to sleep mode.
[0034] Specifically, in S301 , a sleep instruction is received by the electronic device. The sleep instruction may be sent by a user operating the electronic device, or may be transmitted from another electronic device through a network. After receiving the sleep instruction, the electronic device may analyze and identify the sleep instruction to check whether to execute the sleep instruction.
[0035] In S303, a volatile memory device of the electronic device is coupled to a network power supply. This may be achieved by a power switching device of the electronic device. In some illustrative embodiments, the network power supply may be power on Ethernet.
[0036] And in S305, a local power supply which powers the electronic device before it is switched to sleep mode is turn off. This may also be achieved by the power switching device.
[0037] FIG. 4 illustrates a schematic flow chart of a method S400 for switching an electronic device from working mode to sleep mode. The method S400 includes: in S401 , receiving a sleep instruction; in S403, switching a volatile memory device of the electronic device from a local power supply, which powers the electronic device before it is switched to sleep mode, to a network power supply; and in S405, shutting down the local power supply. Detail description of the method S400 is omitted herein, as it can be referred to above description of S300.
[0038] FIG. 5 illustrates a schematic flow chart of a method S500 for switching an electronic device from sleep mode to working mode. The method S500 includes: in S501 , receiving a wake-up instruction; in S503, turning on a local power supply; in S505, uncoupling a volatile memory device of the electronic device from a network power supply; and in S507, coupling the volatile memory device to the local power supply.
[0039] Specifically, in S501 , a wake-up instruction is received by the electronic device. The wake-up instruction may be sent by a user operating the electronic device, or may be transmitted from another electronic device through a network. After receiving the wake-up instruction, the electronic device may analyze and identify the wake-up instruction to check whether to execute the wake-up instruction.
[0040] In S503, a local power supply is turn on. The local power supply is turn on to prepare for powering the electronic device in working mode. This may be achieved by a power switching device of the electronic device.
[0041] In S505, a volatile memory device of the electronic device is uncoupled from a network power supply. The network power supply may be power on Ethernet, which powers the volatile memory device to keep the data therein when the electronic device is in sleep mode. This may also be achieved by the power switching device.
[0042] And in S507, the volatile memory device is coupled to the local power supply. Therefore, the electronic device is powered by the local power supply to support its normal working and is switched to working mode. This may also be achieved by the power switching device.
[0043] FIG. 6 illustrates a schematic flow chart of a method S600 for switching an electronic device from sleep mode to working mode. The method S600 includes: in S601 , receiving a wake-up instruction; in S603, turning on a local power supply coupled to the electronic device; and in S605, switching a volatile memory device of the electronic device from a network power supply to the local power supply. Detail description of the method S600 is omitted herein, as it can be referred to above description of S500.
[0044] While various aspects and embodiments have been disclosed herein, other aspects and embodiments will be apparent to those skilled in the art in light of the present application. The various aspects and embodiments disclosed herein are for purposes of illustration and are not intended to be limiting, with the true scope and spirit being indicated by the following claims.

Claims

We claim:
1 . An electronic device capable of switching between sleep mode and working mode, comprising: a volatile memory device; and a power switching device; where the power switching device is configured to couple the volatile memory device to a network power supply when the electronic device is in sleep mode, and configured to couple the volatile memory device to a local power supply when the electronic device is in working mode.
2. The electronic device according to claim 1 , wherein the power switching device is a three-phase circuit comprising a first end configured to couple to the volatile memory device, a second end configured to couple to the network power supply and a third end configured to couple to the local power supply.
3. The electronic device according to claim 1 , wherein the network power supply is power on Ethernet.
4. An electronic device capable of switching between sleep mode and working mode, comprising: a volatile memory device; and a power switching device; where the power switching device is configured to switch the volatile memory device from a local power supply, which powers the electronic device before it is switched to sleep mode, to a network power supply when the electronic device receives a sleep instruction so as to switch the electronic device to sleep mode, and configured to switch the volatile memory device from the network power supply to the local power supply when the electronic device receives a wake-up instruction so as to switch the electronic device to working mode.
5. The electronic device according to claim 4, wherein the power switching device is a three-phase circuit comprising a first end configured to couple to the volatile memory device, a second end configured to couple to the network power supply and a third end configured to couple to the local power supply.
6. The electronic device according to claim 4, wherein the network power supply is power on Ethernet.
7. A method for switching an electronic device from working mode to sleep mode, comprising: receiving a sleep instruction; coupling a volatile memory device of the electronic device to a network power supply; and shutting down a local power supply which powers the electronic device before it is switched to sleep mode.
8. The method according to claim 7, wherein the network power supply is power on Ethernet.
9. A method for switching an electronic device from working mode to sleep mode, comprising: receiving a sleep instruction; switching a volatile memory device of the electronic device from a local power supply, which powers the electronic device before it is switched to sleep mode, to a network power supply; and shutting down the local power supply.
10. The method according to claim 9, wherein the network power supply is power on Ethernet.
1 1. A method for switching an electronic device from sleep mode to working mode, comprising: receiving a wake-up instruction; turning on a local power supply coupled to the electronic device; uncoupling a volatile memory device of the client device from a network power supply; and coupling the volatile memory device to the local power supply.
12. The method according to claim 11 , wherein the network power supply is power on Ethernet.
13. A method for switching an electronic device from sleep mode to working mode, comprising: receiving a wake-up instruction; turning on a local power supply coupled to the electronic device; and switching a volatile memory device of the electronic device from a network power supply to the local power supply.
14. The method according to claim 13, wherein the network power supply is power on Ethernet.
PCT/CN2012/079261 2012-07-27 2012-07-27 Device and method for switching between sleep mode and working mode WO2014015513A1 (en)

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