KR20160126508A - Computer main power supply control apparatus and method according to the operational condition - Google Patents

Computer main power supply control apparatus and method according to the operational condition Download PDF

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KR20160126508A
KR20160126508A KR1020150057628A KR20150057628A KR20160126508A KR 20160126508 A KR20160126508 A KR 20160126508A KR 1020150057628 A KR1020150057628 A KR 1020150057628A KR 20150057628 A KR20150057628 A KR 20150057628A KR 20160126508 A KR20160126508 A KR 20160126508A
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power
computer
main board
mode
power consumption
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KR1020150057628A
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Korean (ko)
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방창용
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주식회사 늑대와여우컴퓨터
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    • 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
    • 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
    • Y02B60/121—
    • Y02B60/1278—

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Abstract

The present invention relates to an apparatus and method for controlling power of a main body according to an operating state in which power consumption is detected by detecting a consumption power consumption state that varies depending on the operating state of a computer and by optimally controlling standby power according to the operating state of the computer, A computer main board operating the computer in multiple operating modes; And a power supply unit for detecting power consumption that varies in accordance with an operating mode of the computer main board in real time and for preventing power consumption by shutting off standby power supplied to the computer main board when standby power is unnecessary, When the power consumption of the computer main board is measured in real time and the measured power consumption is the power consumption in the power off mode or the power saving mode in the maximum power saving mode, The standby power supply to the main board is cut off to realize the power saving.

Figure P1020150057628

Description

[0001] The present invention relates to a computer main power supply control apparatus and method,

The present invention relates to power control of a main body of a computer according to an operating state, and more particularly to a power control method for detecting a consumption power consumption state that varies depending on an operating state of a computer and optimizing standby power according to a computer operating state And more particularly, to a power control apparatus and method for a computer main body according to an operating state.

In general, the computer operates in a variety of operating modes. For example, it operates in various operating modes such as an AC power cutoff mode, a power off mode, a hibernation mode, a standby mode, and a basic operating mode.

Here, the power consumption is changed according to each operation mode, and in the hibernation mode or the standby mode, power control is performed using a predetermined power saving algorithm for power saving.

Various researches have been conducted to save power of the computer main body. As an example of various studies, in the following Patent Document 1, International Patent Application Publication No. WO 2013147483 A1 (published on October 3, 2013) Technology has been disclosed.

In the prior art disclosed in Patent Document 1, a power switching unit is provided at a front end when power is supplied to a computer. When the computer is powered off, the power of the peripheral device (monitor) is shut off to shut off the standby power. That is, the computer includes a power switching unit 20 that receives external commercial power and provides operating power to the internal components of the computer, an outlet power switching unit 19 for turning off / supplying power to the peripheral devices, 18). When the computer is in the standby mode (power save mode), the socket power switching unit 19 is controlled by using the memory power source to shut off the power (AC power) supplied to the computer peripheral device. Through this process, the standby power is cut off to prevent the waste of power saving and suppress the generation of co2.

In addition, in the related art disclosed in the following Patent Document 2, the driving state of the computer is monitored, and when the computer is not operated, peripheral devices (monitors, lights, heaters , Air conditioner, etc.), and when the user operates the computer again, the peripheral device is automatically powered to operate the peripheral device without any separate operation for the peripheral device. According to this control, when the power line communication is used according to the operation state of the computer, it is not necessary to install a separate cable, the power supply is controlled to the peripheral device by using the already installed power line, Non-idle time and energy wasted during standby time after system shutdown.

In addition, the prior art disclosed in Patent Document 3 completely disables the power supply of the computer peripheral device in the standby mode (power saving mode) or the monitor power off mode while the computer is in use, and completely turns off the power of the computer and the peripheral device when the computer is turned off. The waste electric power consumption and the waste standby electric power can be made zero without removing the plug and the excessive pollutant CO 2 generated by the unnecessary electric power generation can be suppressed and the environmental pollution can be reduced.

International Publication No. WO 2013147483 Al (published Oct. 3, 2013) Korean Patent Publication No. 10-2011-0101564 (published on September 16, 2011) Korean Patent Laid-Open No. 10-2013-0109060 (Published Oct. 10, 2013)

However, the above-described conventional techniques have an advantage in that power consumption of a peripheral device is prevented from being wasted when the computer is powered off or in a power saving mode, and power consumption of the computer main body is also prevented to some extent in a power saving mode. However, There is a disadvantage in that the standby power of the computer main body can not be optimally controlled on the basis of power consumption which varies depending on various attached devices.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a method and apparatus for measuring a consumed power consumption state depending on an operating state of a computer and various attached devices, The present invention provides a computer main body power control apparatus and a method thereof according to an operating state in which standby power is controlled optimally by setting a standby power cutoff reference value.

It is another object of the present invention to provide a method of operating a computer by detecting a power consumption state that occurs according to an operating state and by operating the computer when the standby power source is no longer needed, And a method thereof.

According to an aspect of the present invention, there is provided an apparatus for controlling power of a computer main body, comprising: a computer main board for operating a computer in a plurality of operating modes; And a power supply unit for detecting power consumption depending on an operating mode of the computer main board and a mounted device in real time and for preventing power consumption by shutting off standby power supplied to the computer main board when standby power is unnecessary .

The computer main board operates the computer using at least one of operating modes of a commercial power-off state, an off mode, a hibernation mode, a standby mode, and a basic operating mode.

The power supply device measures the power consumption of the computer main board in real time. If the measured power consumption is the power consumption in the power off mode or the power saving mode in the power saving mode, And the power supply is cut off.

The power supply may include a power generator for generating power for supplying the computer main board, a power switch for supplying or disconnecting power to the computer main board, The main power of the computer main board is measured by power consumption according to the operating state of the computer main board and the power switch is controlled according to the power consumption according to the measured operating state, And a power control unit for controlling the power supply unit.

When the power button switch of the computer main board is operated from the off state to the on state, the power controller detects the pressing state of the power button switch and controls the power to be supplied to the computer main board when the power button is turned on .

The power controller controls power consumption according to the operating state of the computer main board and the apparatus mounted on the computer in cooperation with the power generator, compares the measured power consumption with the power consumption when the operating mode is off mode, A power consumption measuring and controlling unit for controlling a main power supply of the computer main board according to the comparison result; A computer power button recognition unit for sensing a change in the power line impedance of the computer main board and transmitting the detected power line impedance to the power consumption measurement and control unit using a power button recognition signal; And a power supply status checking unit for checking the status of the power supply and transmitting the measured power to the power consumption measuring and controlling unit.

According to an aspect of the present invention, there is provided a method of controlling power of a main body of a computer according to an embodiment of the present invention, the method comprising the steps of: (a) step; (b) when the power button switch provided on the computer body is turned on, turning on the computer and measuring power consumption according to the operation of the computer in real time; (c) checking whether the main power of the computer is off, determining that the computer is turned on when the main power is off, moving to step (b) Determining that the computer is in a standby mode or an off mode when the computer is in an off state; (d) comparing the off level reference value stored in the step (a) with the power consumption according to the computer operation measured in the step (b) when the computer is in the standby mode as a result of the step (c) Checking; (e) blocking the standby power supply to the main board of the computer when the power consumption of the computer is lower than the off level reference value or the operating state of the computer is off mode as a result of step (d) .

According to another aspect of the present invention, there is provided a method of controlling power of a main body of a computer according to an operating state of a computer, comprising the steps of: (f) checking whether the power button switch is turned on, (g) supplying standby power to the computer main board when the power button switch is turned on as a result of step (f)

In the step (g), an amount of change in impedance of the power line is sensed and recognized as a power button recognition signal.

According to the present invention, it is possible to detect a consumption power consumption state that varies according to the operating state of a computer, and to control the standby power supply according to the operating state of the computer based on the detected power consumption state, There are advantages to be implemented.

1 is a block diagram of an apparatus for controlling power of a computer main body according to an operating state according to a preferred embodiment of the present invention;
2 is a flowchart showing a power control method of a computer main body according to an operating state;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an apparatus and method for controlling a main body of a computer according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram of a power control apparatus for a computer main body according to an operating state according to a preferred embodiment of the present invention.

The computer main body power control apparatus according to an operating state according to the present invention includes a computer main board 100 and a power supply apparatus 200.

The computer main board 100 plays a role of operating a computer in a plurality of operating modes. Here, the plurality of operating modes include at least one of a commercial power-off state, an off mode, a hibernation mode, a standby mode, and a basic operating mode.

The power supply device 200 actively generates a reference value for shutting off the standby power by detecting power consumption depending on the operating mode of the computer main board 100 and the mounted device, In the operating state, the standby power supplied to the computer main board 100 is cut off to prevent power consumption.

The power supply device 200 actively and automatically generates and stores a reference value for shutting off the standby power, measures the power consumption of the computer main board 100 in real time, and measures the measured power consumption in the power off mode If the power consumption is the power consumption or the power consumption in the maximum power saving mode, the standby power supply to the computer main board 100 is preferably cut off to realize power saving.

The power supply unit 200 includes a power supply unit 210 for generating power for supplying the computer main board 100, a power switch 220 for supplying or cutting off power to the computer main board 100, The power supply unit 210 measures power supplied from the power supply unit 210 to the computer main board 100 in accordance with the operating state of the computer main board 100, And a power controller 230 for controlling the power of the computer main board 100 by controlling the power controller 220.

Preferably, the power control unit 230 senses an amount of change in impedance of the power button switch line 10, recognizes the amount of change in impedance of the power button switch line 10 as a power button recognition signal, determines that the power button has been operated So that power is supplied to the computer main board 100.

The power control unit 230 measures the power consumption according to the operation state of the computer main board 100 in cooperation with the power generation unit 210 and measures the power consumption when the measured power consumption and the operation mode are off mode A power consumption measuring and controlling unit 231 for controlling the main power supply of the computer main board 100 according to the comparison result; A computer power button recognition unit 232 for sensing an amount of change in impedance of the power button switch line 10 of the computer main board 100 and transmitting the sensed amount of power change to the power consumption measurement and control unit 231 using a power button recognition signal; And a power supply status checking unit 233 for checking the status of the power supply and transmitting the information to the power consumption measuring and controlling unit 231.

Here, the power consumption measurement and control unit 231 controls the operation state information of the computer power button switch, recognized by the computer power button recognition unit 232, 233 and the power consumption status information of the computer main board 100 to control the power switch 220 to supply or cut off the power of the computer main board 100 .

The operation of the computer main body power control apparatus according to the operating state according to the present invention will be described in detail as follows.

First, when the commercial AC power source (AC power source) is input to the computer, the power generation unit 210 of the power supply device 200 generates and supplies standby power for supplying the computer main board 100. At this time, the power switch 220 is turned on in the initial state, and supplies the standby power generated by the power generating unit 210 to the computer main board 100. Thus, the computer main board 100 operates in a standby state.

When the standby power is supplied to the computer main board 100, the power consumption in the power control unit 230 and the standby power supplied from the control unit 231 to the computer main board 100 are measured by the power consumption of the computer, And stored in the internal memory as a reference value for interrupting the standby power of the battery. Here, the power consumption differs depending on the operating state of the computer and various devices installed in the computer. `

In a standby state, when the user presses a power button switch provided on the main body to use the computer, the computer power button recognition unit 232 of the power control unit 230 detects an impedance change amount of the power button switch line 10 And transmits it to the power consumption measurement and control unit 231 as a power button recognition signal.

Here, the impedance of the power button switch line 10 connected between the power supply device 200 and the computer main board 100 is detected when the power button switch is turned on with the power button switch turned off, and the impedance is sensed And recognizes it as a power button recognition signal.

When the power button recognition signal is received, the power consumption measuring and controlling unit 231 recognizes that the user has operated the power button switch, and while maintaining the switching state of the power switch 220, So as to generate the main power.

In response to this control, the power generator 210 performs full-wave rectification and smoothing of the input commercial AC power to generate DC power corresponding to the predetermined main power, and supplies the main power to the computer main board 100.

Thus, the computer is in a normal operating state. In this case, the power consumption measuring and controlling unit 231 measures the power consumed by the computer main board 100 in real time. In this case, the measured power consumption is stored in the internal memory as the power consumption corresponding to the basic operating mode of the computer.

Meanwhile, the computer main board 100 operates in five power modes according to the operating state of the computer. That is, the commercial AC power-off state, the off mode, the hibernation mode, the standby mode, and the basic operating mode.

In this case, when the computer main board 100 operates in five modes, the power consumption differs depending on the operation mode and various installed devices.

For example, when the user does not use the computer for a long period of time, the computer main board 100 switches the operation mode to the standby mode, and in the standby mode, depending on the user's setting, When the power is turned off, the computer is switched to the off mode, and the power consumption differs depending on the operating state.

The power consumption measuring and controlling unit 231 measures in real time the power consumption that varies depending on the operating state of the computer, and the main power is turned off through the power supply status checking unit 233, If it is not, the computer recognizes the computer as on, and repeats the process of measuring the power consumption of the computer in real time. If the main power is off during the process of measuring the power consumption in real time, the power consumption measured in real time according to the operating state of the computer and the reference power consumption in the off mode measured and stored in the initial standby mode are compared do.

If the currently measured power consumption is higher than the reference power consumption in the off mode as a result of the power consumption comparison, it is determined that the current operating state of the computer is the standby mode and the current state is maintained.

Alternatively, if the currently measured power consumption is lower than the reference power consumption in the off mode or equal to the power consumption in the off mode, it is determined that the operating state of the computer is the off mode or the maximum power saving mode, Controls the switch 220 to turn off the power switch 220. [ When the power switch 220 is turned off, the power generated by the power generator 210 is not supplied to the computer main board 100. As a result, the computer main board 100 does not consume power at all, thereby achieving the best power saving.

For example, the present invention classifies the state of power consumption consumed in operating the computer, automatically generates a reference value for shutting off the standby power, automatically detects power consumption in each operating state in real time, (Off mode or hibernation mode). That is, when standby power is no longer needed on the computer main board, the standby power supplied to the computer main board is completely cut off, thereby realizing the power saving mode.

When the user presses the power button switch to use the computer while the power of the computer main board 100 is turned off, the impedance of the power button switch line 10 is sensed and the computer power button recognition And outputs the generated power button recognition signal to the power consumption measurement and control unit 231. The power consumption measurement unit 231 receives the power button recognition signal,

When the power button recognition signal is received, the power consumption measuring and controlling unit 231 recognizes that the power button switch is operated and immediately turns on the power switch 220 so that the power generated by the power generating unit 210 is transmitted to the computer main board (100).

FIG. 2 is a flowchart illustrating a power control method of a computer main body according to an operating state according to the present invention, wherein S represents a step.

As shown in FIG. 2, the method of controlling power of a computer main body according to an operating state according to the present invention comprises the steps of: (a) measuring power consumption when a commercial power is supplied and a computer is booted, S101 to S103); (b) a step (S104 to S106) of turning on the computer when the power button switch provided on the computer body is turned on and measuring the power consumption according to the operation of the computer in real time; (c) checking whether the main power of the computer is off, determining that the computer is turned on when the main power is off, moving to step (b) (S107) when it is determined that the computer is operated in the standby mode or the off mode in the off state; (d) comparing the off level reference value stored in the step (a) with the power consumption according to the computer operation measured in the step (b) when the computer is in the standby mode as a result of the step (c) (S108); (e) when the power consumption of the computer is lower than the off-level reference value or the operating state of the computer is off mode as a result of the checking in the step (d), the standby power supply to the main board of the computer is interrupted ).

(F) checking whether the power button switch is turned on in a state where the standby power to be supplied to the computer main board 100 is shut off, (S110); (g) supplying standby power to the computer main board 100 when the power button switch is turned on as a result of the checking in step (f), wherein the step (g) The amount of change in impedance is detected and recognized as a power button recognition signal.

The operation of the computer main body power control method according to the operating state according to the present invention will be described in detail as follows.

First, when a commercial AC power source (AC power source) is input to the computer in step S101, the power generation unit 210 of the power supply apparatus 200 generates and supplies standby power for supplying the computer main board 100. [ At this time, the power switch 220 is turned on in the initial state, and supplies the standby power generated by the power generating unit 210 to the computer main board 100. Thus, the computer main board 100 operates in a standby state.

When the computer main board 100 is supplied with standby power, the power consumption measurement in the power control unit 230 and the control unit 231 in step S102 measure the standby power supplied to the computer main board 100 as the power consumption of the computer , And stores it in the internal memory as the power consumption at the time of off in step S103. That is, the power consumption which varies depending on the device mounted in the standby mode at the time of the initial boot is automatically generated and stored as a reference value for the standby power-off.

In the standby state, if the user presses a power button switch provided on the main body for using the computer as in step S104, the computer power button recognition unit 232 of the power control unit 230 selects the power button switch line 10 and transmits the detected power change to the power consumption measurement and control unit 231 with the power button recognition signal.

Here, the impedance of the power button switch line 10 connected between the power supply device 200 and the computer main board 100 is detected when the power button switch is turned on with the power button switch turned off. When the power button recognition signal is received, the power consumption measuring and controlling unit 231 recognizes that the user has operated the power button switch, and while maintaining the switching state of the power switch 220, So as to generate the main power.

In response to this control, the power generator 210 performs full-wave rectification and smoothing of the input commercial AC power to generate DC power corresponding to the predetermined main power, and supplies the main power to the computer main board 100.

As a result, in step S105, the computer is in a normal operating state. In this case, the power consumption measurement and control unit 231 measures the power consumed in the computer main board 100 in real time as in step S106. In this case, the measured power consumption is stored in the internal memory as the power consumption corresponding to the basic operating mode of the computer.

Meanwhile, the computer main board 100 operates in five power modes according to the operating state of the computer. That is, the commercial AC power-off state, the off mode, the hibernation mode, the standby mode, and the basic operating mode.

Here, when the computer main board 100 operates in five modes, the power consumption differs depending on the operation mode.

For example, when the user does not use the computer for a long period of time, the computer main board 100 switches the operation mode to the standby mode, and in the standby mode, depending on the user's setting, When the power is turned off, the computer is switched to the off mode, and the power consumption differs depending on the operating state.

The power consumption measuring and controlling unit 231 measures in real time the power consumption that varies depending on the operating state of the computer. In step S107, the power supply status checking unit 233 checks whether the main power is off, If the power is not in the off state, it is recognized that the computer is on, and the process of measuring the power consumption of the computer in real time is repeated.

If the main power is off during the process of measuring the power consumption in real time, the process goes to step S108, where the power consumption measured in real time according to the operating state of the computer and the power consumption measured in the off mode Compare power consumption.

If the currently measured power consumption is higher than the power consumption in the off mode as a result of the power consumption comparison, it is determined that the current operating state of the computer is the standby mode and the current state is maintained.

If the currently measured power consumption is lower than the power consumption in the off mode or equal to the power consumption in the off mode, it is determined that the operating state of the computer is the off mode or the maximum power saving mode. In step S109 And controls the power switch 220 so that the power switch 220 is turned off. When the power switch 220 is turned off, the power generated by the power generator 210 is not supplied to the computer main board 100. As a result, the computer main board 100 does not consume power at all, thereby achieving the best power saving.

For example, the present invention can classify the state of power consumption consumed in operating a computer, detect differential power consumption according to each operating state in real time, and when it is in a specific state (off mode or hibernation mode) When the standby power is no longer needed on the computer main board, the standby power supplied to the computer main board is completely cut off, thereby realizing the power saving.

When the user presses the power button switch to use the computer as in step S110, the impedance of the power button switch line 10 is sensed, and the power control unit 230 detects the impedance of the power button switch line 10, The computer power button recognition unit 232 of the controller 231 generates a power button recognition signal and transmits the power button recognition signal to the power consumption measurement and control unit 231. [

In step S111, when the power button recognition signal is received, the power consumption measurement and control unit 231 recognizes that the power button switch is operated, and immediately turns on the power switch 220 so that the power generated by the power generation unit 210 To be supplied to the computer main board 100.

In step S112, it is checked whether a power button event occurs. If a power button event occurs, the process proceeds to step S113 where a special event operation is performed.

The present invention measures the power consumed by the computer from the time when the commercial AC power is applied to the computer, and separately consumes power consumed by each mode, And controls the power supply of the computer main board in such a manner as to control the power supply.

When the computer is in operation (off mode, hibernation mode), that is, standby power is no longer needed, it is supplied to the computer main board The standby power is completely cut off, and the power saving is realized.

Although the present invention has been described in detail with reference to the above embodiments, it is needless to say that the present invention is not limited to the above-described embodiments, and various modifications may be made without departing from the spirit of the present invention.

The present invention is effectively applied to a technique for implementing a power saving by shutting off a standby power source in a computer main body having a built-in power supply device.

10: Power button switch line
100: Computer main board
200: Power supply
210: Power generator
220: Power switch
230:
231: Power consumption measurement and control unit
232: Computer power button recognition unit
233: Power supply status check section

Claims (8)

A computer main board operating the computer in multiple operating modes; And
A reference value for shutting off the standby power is automatically generated by sensing the power consumption depending on the operating mode of the computer main board and the mounted device, and if the standby power is unnecessary, And a power supply unit for shutting off power to prevent power consumption.
The computer main board according to claim 1, wherein the computer main board operates the computer using at least one operating mode of a commercial power-off state, an off mode, a hibernation mode, a standby mode and a basic operating mode. Computer body power control device.
The computer main board according to claim 1, wherein the power supply device measures power consumption of the computer main board in real time, and when the measured power consumption is the power consumption in the power off mode or the power saving mode in the power saving mode, And the standby power supply for supplying power to the main body is interrupted.
The power supply unit according to claim 3, wherein the power supply unit comprises: a power generator for generating power for supplying the computer main board; a power switch for supplying or blocking power to the computer main board; A power supply for supplying power to the computer main board from the power generator to the computer main board is measured as power consumption according to the operating state of the computer main board to actively generate and store a reference value for shutting off the standby power, And a power controller for comparing the power reference value with the power consumption of the computer main board measured in real time and controlling the power of the computer main board by controlling the power switch according to the comparison result. The computer main body power control device.
The power supply controller according to claim 4, wherein when the power button switch of the computer main board is operated from the off state to the on state, the power control unit senses the depression state of the power button switch and supplies power to the computer main board And controlling the power of the main body according to the operating state.
[Claim 4] The power control unit of claim 4, wherein the power control unit measures power consumption according to the operating state of the computer main board and the mounted device in cooperation with the power generation unit, and measures power consumption when the measured power consumption and the operating mode are off mode A power consumption measuring and controlling unit for controlling the main power supply of the computer main board according to the comparison result; A computer power button recognition unit for detecting a change amount of a power button switch line impedance of the computer main board and transmitting the power button recognition signal to the power consumption measurement and control unit; And a power supply status checking unit for checking the status of the power supply unit and transmitting the measured power to the power consumption measuring unit and the control unit.
(a) measuring the power consumption and storing the off-level reference value when commercial power is supplied and the computer is booted;
(b) when the power button switch provided on the computer body is turned on, turning on the computer and measuring power consumption according to the operation of the computer in real time;
(c) checking whether the main power of the computer is off, determining that the computer is turned on when the main power is off, moving to step (b) Determining that the computer is in a standby mode or an off mode when the computer is in an off state;
(d) comparing the off level reference value stored in the step (a) with the power consumption according to the computer operation measured in the step (b) when the computer is in the standby mode as a result of the step (c) Checking; And
(e) blocking the standby power supply to the main board of the computer when the power consumption of the computer is lower than the off level reference value or the operating state of the computer is off mode as a result of step (d) And controlling the power of the main body according to the operating state.
The method according to claim 7, further comprising the steps of: (f) checking whether the power button switch is turned on in a state in which the standby power supplied to the computer main board is shut off; (g) supplying standby power to the computer main board when the power button switch is turned on as a result of step (f)
Wherein the step (g) detects an impedance change amount of the power button switch line and recognizes the change amount as a power button operation signal.



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Cited By (4)

* Cited by examiner, † Cited by third party
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KR20190002934U (en) * 2018-05-18 2019-11-27 이브이지에이 코포레이션 Power communication device of display card
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KR20190002934U (en) * 2018-05-18 2019-11-27 이브이지에이 코포레이션 Power communication device of display card
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