CN1797325A - Method and system for managing power supply of peripheral equipment of computer - Google Patents
Method and system for managing power supply of peripheral equipment of computer Download PDFInfo
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Abstract
The invention discloses a power supply management method and system for peripheral devices of a computer, for controlling switching-on and -off of power supplies connected with the peripheral devices . And the method comprises the steps of: triggering, i.e. setting power supply ON and OFF positions for the peripheral devices in BIOS system or driver; controlling, i.e. as the BIOS system or driver runs to the ON and OFF positions, making write operation with different values on the registers of chip output ports on mainboard, using level values of the chip output port to express ON/OFF, where the chip output ports correspond to the peripheral devices one to one; executing, i.e. according to the level values, switching on or off the power supplies of the peripheral devices corresponding to the chip output ports. And the system comprises triggering module, control module and executing circuit.
Description
Technical field
The present invention relates to method for managing power supply and system, refer to a kind of method for managing power supply and system of computer peripheral equipment especially.
Background technology
Along with computer uses widely, computer has been come into people's life.The peripheral hardware of computer also increases gradually simultaneously, for example: display, printer, audio amplifier etc., the power supply control of these equipment is not that main frame is controlled generally, for example the power management of audio amplifier.After closing computer, the audio amplifier power supply must be closed from the switch of outside.Because main frame cannot carry out power management to peripheral hardware, the power management work of these peripheral hardwares will the user be finished, and can bring inconvenience to computer user, causes waste of electric energy.
At the problems referred to above, prior art also provides some peripheral power supply management technical schemes.Scheme one sees also application number and is 97221438.0 Chinese patent application, detects the power supply of controlling peripheral hardware by the power supply to main frame.Though this technical scheme has some improvement to peripheral power supply management, but main frame can not be controlled the power supply of peripheral hardware, does not thoroughly deal with problems.Individual printer is for example arranged, and is not to start shooting each time all will use printer, so the waste of certain power supply is still arranged.Scheme two sees also application number and is 02134399.3 Chinese patent application, thereby controls the power supply of a socket control peripheral hardware by application program.Because this power management is managed by application program, the management of the power supply of therefore having no idea to realize in start-up phase.Control a socket because of this scheme two by serial ports, parallel port or USB again, serial ports, the parallel port is traditional interface, is not provided with on some legacy interface computing machine now, if control socket by USB, the cost of socket can rise.
Summary of the invention
The problem that the present invention solves provides a kind of method for managing power supply and system of computer peripheral equipment, solves in the prior art and can not use host computer control peripheral hardware power supply and the high problem of technical scheme cost.
For addressing the above problem, the method for managing power supply of computer peripheral equipment of the present invention, be used to control the electric power starting that is connected peripheral hardware with computing machine and close, comprise step: trigger step, the electric power starting and the off-position of peripheral hardware is set in Basic Input or Output System (BIOS) or driver or application program; Controlled step, when Basic Input or Output System (BIOS) or driver or application program run to the electric power starting of peripheral hardware and off-position, mainboard chip output mouth place register is carried out the write operation of different value, represent to open or close with the level value of mainboard chip output mouth, and described mainboard chip output mouth is corresponding one by one with peripheral hardware; Execution in step according to the level value of mainboard chip output mouth, is opened or is closed the peripheral hardware power supply execution of mainboard chip output mouth correspondence.
When the mainboard chip was South Bridge chip, described controlled step further comprised: the base address of inquiring about the output port register from the configuration space of peripheral element extension interface; Find corresponding output port register according to the base address; When Basic Input or Output System (BIOS) or driver or application program run to the electric power starting of peripheral hardware and off-position, the output port register is carried out write operation.
Peripheral hardware includes display, and wherein the electric power starting position of display refers to the main frame start position of Basic Input or Output System (BIOS), and the power-off position of display refers to the response position of shutdown, dormancy and standby to operating system.
Described controlled step can be embedded in the ACPI that Basic Input or Output System (BIOS) provides and move.
Peripheral hardware includes printer, and the electric power starting position of printer refers to print response position in the printed driver, and the power-off position of printer refers to print in the printed driver end position.
Peripheral hardware includes audio amplifier, and the electric power starting position of audio amplifier is that the sound card in the sound card driver starts response position, and to be sound card in the sound card driver close response position in the power-off position of audio amplifier.During for the power management of audio amplifier, controlled step can be embedded in the sound card driver and move.
Correspondingly, the power-supply management system of computer peripheral equipment of the present invention, be used to control the electric power starting that is connected peripheral hardware with computing machine and close, comprising: trigger module is used for being provided with in Basic Input or Output System (BIOS) and driver or application program the electric power starting and the off-position of peripheral hardware; Control module, be used for when Basic Input or Output System (BIOS) or driver or application program run to the electric power starting of peripheral hardware and off-position, mainboard chip output mouth place register is carried out the write operation of different value, represent to open or close with the level value of mainboard chip output mouth, and described mainboard chip output mouth is corresponding one by one with peripheral hardware; Executive circuit is connected between peripheral hardware and the power supply, is used for the level value according to mainboard chip output mouth, the peripheral hardware power supply of mainboard chip output mouth correspondence is carried out opened or close.
When described mainboard chip was South Bridge chip, described control module further comprised: the base address enquiry module is used for from the base address of the configuration space inquiry output port register of peripheral element extension interface; Register is searched module, finds corresponding output port register according to the base address; The write operation module when Basic Input or Output System (BIOS) or driver or application program run to the electric power starting of peripheral hardware and off-position, is carried out write operation to the output port register.
Peripheral hardware includes display, and wherein the electric power starting position of display refers to the main frame start position of Basic Input or Output System (BIOS), and the power-off position of display refers to the response position of shutdown, dormancy and standby to operating system.
Control module can be embedded in the ACPI that Basic Input or Output System (BIOS) provides.
Peripheral hardware includes audio amplifier, and the electric power starting position of audio amplifier is that the sound card in the sound card driver starts response position, and to be sound card in the sound card driver close response position in the power-off position of audio amplifier.
During for the power management of audio amplifier, control module can be embedded in the sound card driver and move.
Described executive circuit comprises a plurality of on-off circuits, the corresponding peripheral hardware of each on-off circuit, be included in the pull-up resistor and the relay of order series connection between peripheral hardware power supply and this peripheral hardware, and the control end of this relay mainboard chip output mouth corresponding with this peripheral hardware connects.
Compared with prior art, the present invention has the following advantages:
The present invention is by the electric power starting position or the power-off position of Basic Input or Output System (BIOS) or driver or the corresponding peripheral hardware of application setting; The level value of the output port of control main board chip or the output of input/output port, and then start executive circuit or execution in step, thus realize the management of the power supply of peripheral hardware.After entering operating system, cooperate to come the level of the output of the output port of control main board chip or input/output port by BIOS and operating system or application program, control the switch of control circuit by the output level of port, thereby realize the management of the power supply of peripheral hardware.Like this, manually control the peripheral hardware power-off, make things convenient for the user without the user; Can reach the saving electric energy; Scheme realizes that cost is low.
Description of drawings
Fig. 1 is the method for managing power supply process flow diagram of computer peripheral equipment of the present invention.
Fig. 2 is the power-supply management system synoptic diagram of computer peripheral equipment of the present invention.
Embodiment
Under situation very perfect aspect the power management of main frame, generally all can meet ACPI (Advanced Configuration Management Interfasce, ACPI) power management standard in the prior art.Main frame also is difficult to all, and peripheral hardware carries out power management.The present invention can manage present peripheral hardware power supply in the prerequisite that does not change present peripheral hardware, thereby solves problems of the prior art.
ACPI power management standard in the prior art is the interface of BIOS (Basic Input or Output System (BIOS)) and OS (operating system) power management.How BIOS controls the various device power supply by ACPI report OS.For example: the method _ ON () of the power supply that provides OS to call the equipment of opening is provided ACPI; BIOS is as long as add peripheral hardware power source method and the condition opened here.Will call when OS will use this peripheral hardware _ ON opens device power supply (DPS).In like manner OS by call _ OFF () this method comes the closing device power supply.
Output port or input/output port that the present invention comes the control main board chip by BIOS are controlled the switch of peripheral hardware by the level of output port, thereby realize the management of the power supply of peripheral hardware.So not only cost price is low, and the computer peripheral equipment power supply of accomplishing that can be real can be controlled.
Please refer to Fig. 1, the method for managing power supply of computer peripheral equipment of the present invention is used to control the electric power starting that is connected peripheral hardware with computing machine and closes, and it is characterized in that, comprises step:
Trigger step, the electric power starting and the off-position of peripheral hardware is set in Basic Input or Output System (BIOS) or driver or application program;
Controlled step, when Basic Input or Output System (BIOS) or driver or application program run to the electric power starting of peripheral hardware and off-position, mainboard chip output mouth place register is carried out the write operation of different value, represent to open or close with the level value of mainboard chip output mouth, and described mainboard chip output mouth is corresponding one by one with peripheral hardware;
Execution in step according to the level value of mainboard chip output mouth, is opened or is closed the peripheral hardware power supply execution of mainboard chip output mouth correspondence.
When the mainboard chip was South Bridge chip, described controlled step further comprised: the base address of inquiring about the output port register from the configuration space of peripheral element extension interface; Find corresponding output port register according to the base address; According to the electric power starting and the off-position of peripheral hardware, the output port register is carried out write operation.
Peripheral hardware includes display, and wherein the electric power starting position of display refers to the main frame start position of Basic Input or Output System (BIOS), and the power-off position of display refers to the response position of shutdown, dormancy and standby to operating system.
Controlled step is embedded in the ACPI that Basic Input or Output System (BIOS) provides and moves.
Peripheral hardware includes printer, and wherein the electric power starting position of printer refers to print response position in the printed driver, and the power-off position of printer refers to print in the printed driver end position.
Peripheral hardware includes audio amplifier, and the electric power starting position of audio amplifier is that the sound card in the sound card driver starts response position, and to be sound card in the sound card driver close response position in the power-off position of audio amplifier.During for the power management of audio amplifier, controlled step is embedded in the sound card driver and moves.
Please refer to shown in Figure 2, the power-supply management system of computer peripheral equipment of the present invention, be used to control the electric power starting that is connected peripheral hardware with computing machine and close, comprising: trigger module is used for being provided with in Basic Input or Output System (BIOS) and driver or application program the electric power starting and the off-position of peripheral hardware; Control module, be used for when Basic Input or Output System (BIOS) or driver or application program run to the electric power starting of peripheral hardware and off-position, mainboard chip output mouth place register is carried out the write operation of different value, represent to open or close with the level value of mainboard chip output mouth, and described mainboard chip output mouth is corresponding one by one with peripheral hardware; Executive circuit is connected between peripheral hardware and the power supply, is used for the level value according to mainboard chip output mouth, the peripheral hardware power supply of mainboard chip output mouth correspondence is carried out opened or close.
When the mainboard chip was South Bridge chip, described control module further comprised: the base address enquiry module is used for from the base address of the configuration space inquiry output port register of peripheral element extension interface; Register is searched module, finds corresponding output port register according to the base address; The write operation module according to the electric power starting and the off-position of peripheral hardware, is carried out write operation to the output port register.
Peripheral hardware includes display, and wherein the electric power starting position of display refers to the main frame start position of Basic Input or Output System (BIOS), and the power-off position of display refers to the response position of shutdown, dormancy and standby to operating system.Control module is embedded in the ACPI that Basic Input or Output System (BIOS) provides.
Peripheral hardware includes audio amplifier, and the electric power starting position of audio amplifier is that the sound card in the sound card driver starts response position, and to be sound card in the sound card driver close response position in the power-off position of audio amplifier.During for the power management of audio amplifier, control module is embedded in the sound card driver and moves.
Executive circuit comprises a plurality of on-off circuits, and the corresponding peripheral hardware of each on-off circuit is included in order is connected between peripheral hardware power supply and this peripheral hardware pull-up resistor and relay, and the control end of this relay mainboard chip output mouth corresponding with this peripheral hardware connects.
Embodiment one, utilizes the opening and closing of the power supply of BIOS control peripheral hardware
Adopt the GPIO1 (universal input and output port 1) of south bridge (ICH4 of INTEL) to control the power switch of display in the present embodiment.
Will be after main frame start, be set to the electric power starting position of display in the do not bring into operation position of ROM (ROM (read-only memory)) of VGA (Video Graphics Array) of BIOS
When BIOS runs to the electric power starting position of display, carry out controlled step: PCI (peripheral element extension interface) the configuration space BUS0 that reads South Bridge chip, Device31, the address of Function0 is the base address (Base address) that 58～5Bh obtains GPIO (universal input and output port); Obtain the register at the GPIO place of display correspondence by visit Base Address+04H; Control the level value of GPIO1 by this register of write operation, the expression power-on.According to the output level of GPIO1, executive circuit is opened the power supply of display.
Provide among the APCI in the power control method and to prepare dormancy function _ PTS (), when OS enters shutdown (S3), standby (S4) during dormancy (S5), all can be called _ PTS ().So BIOS is as long as add execution in step in _ PTS () (this position of BIOS is set to the power-off position of display), the level value of powered-down is represented in control GPIO1 output, thereby closes display power supply.After entering operating system, when the user will enter shutdown, standby, when not needing display during dormancy, operating system call by BIOS provide ACPI _ PTS ().
When from shutdown, standby, when dormancy was returned, BIOS ran to the display power supply open site once more, carried out controlled step, and the GPIO level of south bridge is opened the power supply of display.Other mainboard chips in like manner, for example, SUPERIO mainboard chip, the register of the output port of write operation display correspondence makes the output port level value different at electric power starting with cutting out diverse location.
In the present embodiment, execution in step or execution module are embedded in the APCI method that BIOS provides, and display power supply is managed, and can be called by operating system.Certainly, also go for the power management of other peripheral hardwares, the peripheral hardware corresponding A CPI function that may call gets final product.
And for example, adopt the GPIO2 of south bridge (ICH4 of INTEL) to control the power switch of audio amplifier in the present embodiment.
Sound card is opened and sound card is closed the enable position that is set at the audio amplifier power supply respectively and the off-position of audio amplifier power supply, and operating system is called respectively function _ ON () and function _ OFF () in the power control method are provided among the APCI
Off-position when enable position that runs to the audio amplifier power supply and audio amplifier power supply, read PCI (peripheral element extension interface) the configuration space BUS0 of South Bridge chip, Device31, the address of Function0 is the base address (Base address) that 58～5Bh obtains GPIO (universal input and output port); Obtain the register at the GPIO place of display correspondence by visit BaseAddress+04H; Control the level value of GPIO2 by this register of write operation, expression is opened or powered-down.According to the output level value of GPIO2, execution in step or execution, shut-off circuit are opened the power supply of audio amplifier.When operating system want sounding to use audio amplifier will call sound card _ ON () comes opening power, can call sound card _ OFF () and come powered-down when Operational System Control is finished.
Embodiment two, utilize application program to realize the peripheral hardware electric power starting and close
The GPIO1 of employing south bridge or SUPERIO controls the power switch of display in the present embodiment, and wherein display power supply is opened with embodiment one, repeats no more.
Originally be among the embodiment, in application program, set the display power supply off-position.
After entering operating system, when the user will enter shutdown, standby, when not needing display during dormancy, application program is by the message mechanism of operating system, and the system of obtaining will shut down, standby, the message of dormancy (application program is the display power supply off-position); Call controlled step or control module, the GPIO1 level of write operation South Bridge chip or SUPERIO; Control execution in step or execution module by the output level of GPIO1, thereby close display power supply.When from S3, S4, when S5 returned, the GPIO level that BIOS controls south bridge or SUPERIO was once more opened the power supply of display.
In like manner, other peripheral hardware power supplys also can call controlled step or control module by the application program mode, realize this peripheral hardware electric power starting and close.
Embodiment three, utilize the peripheral hardware driver to finish this peripheral hardware electric power starting and close
Present embodiment, execution in step or execution module are embedded in the driver of peripheral hardware, when driver runs to peripheral hardware electric power starting position or peripheral hardware power-off position, and operation controlled step or control module, and then the opening and closing of control peripheral hardware power supply.
Adopt the GPIO2 of south bridge (ICH4 of INTEL) to control the power switch of audio amplifier in the present embodiment.
Sound card in the sound card driver is started function PoSetPowerState (fdo, DevicePowerState, 1) and sound card close function PoSetPowerState (fdo, DevicePowerState, 2 or 3 or 4) and be set at the enable position of audio amplifier power supply and the off-position of audio amplifier power supply respectively.
When sound card driver runs to the enable position of audio amplifier power supply and the off-position of audio amplifier power supply, read PCI (peripheral element extension interface) the configuration space BUS0 of South Bridge chip, Device31, the address of Function0 is the base address (Base address) that 58～5Bh obtains GPIO (universal input and output port); Obtain the register at the GPIO place of display correspondence by visit Base Address+04H; Control the level value of GPIO2 by this register of write operation, expression is opened or powered-down.According to the output level value of GPIO2, execution in step or execution, shut-off circuit are opened the power supply of audio amplifier.Want sounding when operating system and will use function PoSetPowerState (fdo in the driver that audio amplifier will call sound card, DevicePowerState, 1) comes opening power, when finishing, can call Operational System Control the driving function PoSetPowerState (fdo of sound card, DevicePowerState, 2 or 3 or 4) come powered-down.
In sum, the present invention is by the electric power starting position or the power-off position of Basic Input or Output System (BIOS) or driver or the corresponding peripheral hardware of application setting; The level value of the output port of control main board chip or the output of input/output port, and then start executive circuit or execution in step, thus realize the management of the power supply of peripheral hardware.After entering operating system, cooperate to come the level of the output of the output port of control main board chip or input/output port by BIOS and operating system or application program, control the switch of control circuit by the output level of port, thereby realize the management of the power supply of peripheral hardware.Like this, manually control the peripheral hardware power-off, make things convenient for the user without the user; Can reach the saving electric energy; Scheme realizes that cost is low.
Claims (15)
1. the method for managing power supply of a computer peripheral equipment is used to control the electric power starting that is connected peripheral hardware with computing machine and closes, and it is characterized in that, comprises step:
Trigger step, the electric power starting and the off-position of peripheral hardware is set in Basic Input or Output System (BIOS) or driver or application program;
Controlled step, when Basic Input or Output System (BIOS) or driver or application program run to the electric power starting of peripheral hardware and off-position, mainboard chip output mouth place register is carried out the write operation of different value, represent to open or close with the level value of mainboard chip output mouth, and described mainboard chip output mouth is corresponding one by one with peripheral hardware;
Execution in step according to the level value of mainboard chip output mouth, is opened or is closed the peripheral hardware power supply execution of mainboard chip output mouth correspondence.
2. the method for managing power supply of computer peripheral equipment as claimed in claim 1 is characterized in that, when the mainboard chip was South Bridge chip, described controlled step further comprised: the base address of inquiring about the output port register from the configuration space of peripheral element extension interface;
Find corresponding output port register according to the base address;
When Basic Input or Output System (BIOS) or driver or application program run to the electric power starting of peripheral hardware and off-position, the output port register is carried out write operation.
3. the method for managing power supply of computer peripheral equipment as claimed in claim 2, it is characterized in that, peripheral hardware includes display, wherein the electric power starting position of display refers to the main frame start position of Basic Input or Output System (BIOS), and the power-off position of display refers to the response position of shutdown, dormancy and standby to operating system.
4. as the method for managing power supply of each described computer peripheral equipment of claim 1 to 3, it is characterized in that controlled step is embedded in the ACPI that Basic Input or Output System (BIOS) provides and moves.
5. the method for managing power supply of computer peripheral equipment as claimed in claim 2, it is characterized in that, peripheral hardware includes printer, and the electric power starting position of printer refers to print response position in the printed driver, and the power-off position of printer refers to print in the printed driver end position.
6. the method for managing power supply of computer peripheral equipment as claimed in claim 2, it is characterized in that, peripheral hardware includes audio amplifier, and the electric power starting position of audio amplifier is that the sound card in the sound card driver starts response position, and to be sound card in the sound card driver close response position in the power-off position of audio amplifier.
7. the method for managing power supply of computer peripheral equipment as claimed in claim 2 is characterized in that, during for the power management of audio amplifier, controlled step is embedded in the sound card driver and moves.
8. the power-supply management system of a computer peripheral equipment is used to control the electric power starting that is connected peripheral hardware with computing machine and closes, and it is characterized in that, comprising:
Trigger module is used for being provided with in Basic Input or Output System (BIOS) and driver or application program the electric power starting and the off-position of peripheral hardware;
Control module, be used for when Basic Input or Output System (BIOS) or driver or application program run to the electric power starting of peripheral hardware and off-position, mainboard chip output mouth place register is carried out the write operation of different value, represent to open or close with the level value of mainboard chip output mouth, and described mainboard chip output mouth is corresponding one by one with peripheral hardware;
Executive circuit is connected between peripheral hardware and the power supply, is used for the level value according to mainboard chip output mouth, the peripheral hardware power supply of mainboard chip output mouth correspondence is carried out opened or close.
9. the power-supply management system of computer peripheral equipment as claimed in claim 8, it is characterized in that, when the mainboard chip was South Bridge chip, described control module further comprised: the base address enquiry module is used for from the base address of the configuration space inquiry output port register of peripheral element extension interface;
Register is searched module, finds corresponding output port register according to the base address; The write operation module when Basic Input or Output System (BIOS) or driver or application program run to the electric power starting of peripheral hardware and off-position, is carried out write operation to the output port register.
10. the power-supply management system of computer peripheral equipment as claimed in claim 9, it is characterized in that, peripheral hardware includes display, wherein the electric power starting position of display refers to the main frame start position of Basic Input or Output System (BIOS), and the power-off position of display refers to the response position of shutdown, dormancy and standby to operating system.
11. the power-supply management system as each described computer peripheral equipment of claim 8 to 10 is characterized in that, control module is embedded in the ACPI that Basic Input or Output System (BIOS) provides.
12. the power-supply management system of computer peripheral equipment as claimed in claim 9, it is characterized in that, peripheral hardware includes audio amplifier, the electric power starting position of audio amplifier is that the sound card in the sound card driver starts response position, and to be sound card in the sound card driver close response position in the power-off position of audio amplifier.
13. the power-supply management system of computer peripheral equipment as claimed in claim 12 is characterized in that, during for the power management of audio amplifier, control module is embedded in the sound card driver and moves.
14. power-supply management system as claim 8,9,10,12 or 13 each described computer peripheral equipments, it is characterized in that, executive circuit comprises a plurality of on-off circuits, the corresponding peripheral hardware of each on-off circuit, be included in the pull-up resistor and the relay of order series connection between peripheral hardware power supply and this peripheral hardware, and the control end of this relay mainboard chip output mouth corresponding with this peripheral hardware connects.
15. the power-supply management system of computer peripheral equipment as claimed in claim 11, it is characterized in that, executive circuit comprises a plurality of on-off circuits, the corresponding peripheral hardware of each on-off circuit, be included in the pull-up resistor and the relay of order series connection between peripheral hardware power supply and this peripheral hardware, and the control end of this relay mainboard chip output mouth corresponding with this peripheral hardware connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNB2004101026274A CN100357880C (en) | 2004-12-24 | 2004-12-24 | Method and system for managing power supply of peripheral equipment of computer |
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| CNB2004101026274A CN100357880C (en) | 2004-12-24 | 2004-12-24 | Method and system for managing power supply of peripheral equipment of computer |
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| CN100357880C CN100357880C (en) | 2007-12-26 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101546218A (en) * | 2009-01-23 | 2009-09-30 | 北京中星微电子有限公司 | Method, device and system for saving electricity for display device |
| CN101615070B (en) * | 2008-06-25 | 2011-12-07 | 联想(北京)有限公司 | Output device and method for controlling same |
| CN101794166B (en) * | 2009-02-01 | 2012-09-05 | 联想(北京)有限公司 | Drive and computer |
| CN108304223A (en) * | 2017-12-22 | 2018-07-20 | 天津麒麟信息技术有限公司 | A kind of operating system for power supply dormancy mechanism and hardware platform exchange method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR950010897B1 (en) * | 1993-08-06 | 1995-09-25 | 삼성전자주식회사 | Power controller and method of generating power management signals for p.c |
| JPH10228339A (en) * | 1997-02-13 | 1998-08-25 | Canon Inc | Power supply management device |
| CN1504856A (en) * | 2002-12-05 | 2004-06-16 | 昌增科技股份有限公司 | Controlling apparatus and method for sharing power supply of industrial computer system |
-
2004
- 2004-12-24 CN CNB2004101026274A patent/CN100357880C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101615070B (en) * | 2008-06-25 | 2011-12-07 | 联想(北京)有限公司 | Output device and method for controlling same |
| CN101546218A (en) * | 2009-01-23 | 2009-09-30 | 北京中星微电子有限公司 | Method, device and system for saving electricity for display device |
| CN101794166B (en) * | 2009-02-01 | 2012-09-05 | 联想(北京)有限公司 | Drive and computer |
| CN108304223A (en) * | 2017-12-22 | 2018-07-20 | 天津麒麟信息技术有限公司 | A kind of operating system for power supply dormancy mechanism and hardware platform exchange method |
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| CN100357880C (en) | 2007-12-26 |
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