KR100186640B1 - System power control device - Google Patents

Abstract

The present invention relates to a system for preventing loss of data by implementing recovery and power-off of a system in order to prevent data loss of the hard disk driver in the system setting and operation state when the power of the system is turned off And a power supply control device.

In order to achieve the above object, the present invention provides a power supply control apparatus comprising: a sub power supply unit for receiving AC power when a plug is plugged into a DC power supply and supplying standby power to a power switch control unit in the system; Or a power switch control unit that outputs a power control signal according to software control and is driven by a supplied main power source, an electronic switch that supplies / cuts an AC power according to a power control signal output from the power switch control unit in the system, And a main power supply unit for converting the AC power supplied through the electronic switch to the DC power and supplying the main power to the system.

Description

System power control unit

FIG. 1 is a block diagram of a conventional system power control apparatus,

a is a block diagram of a system power control device using a mechanical switch,

and b is a block diagram of the system power control device using an electronic switch.

FIG. 2 is a block diagram of a system power control apparatus according to the present invention; FIG.

FIG. 3 is a detailed circuit diagram of the power switch control section of FIG. 2; FIG.

FIG. 4 is an output waveform diagram of each part of FIG. 3,

a is the system clock,

b is the output clock of the first latch,

c is the output clock of the second latch,

and d is the output clock of the second org.

5 is a signal flow diagram for explaining the operation of FIG. 2; FIG.

DESCRIPTION OF THE REFERENCE NUMERALS

110: Plug 120:

130: System 131: Power switch control unit

131a: first OR gate 131b: first latch (LATCH)

131c: second latch (LATCH) 131d: buffer

131e: second OR gate 140: electronic switch

150: main power supply unit 160: power switch

170: Remote control receiver

The present invention relates to system power control, and more particularly, in order to prevent data loss of a hard disk driver in system setting and operation state when a system power is turned off, system recovery and power shutdown are implemented by software And to a system power control apparatus for preventing loss of data.

As shown in FIG. 1, a conventional system power control apparatus uses a mechanical switch and an electronic switch. First, a system power control apparatus using a mechanical switch, as shown in a, A power supply unit 3 for converting AC power supplied through the mechanical switch 2 into DC power and supplying the DC power to the system 4, And a system 4 that is driven in accordance with the power supplied from the power supply unit 3. The system power control apparatus using the electronic switch as shown in b includes an electronic control unit A main power supply unit 13 for supplying an AC power source through the plug 11 to a DC power source and a DC main power source for converting the AC main power source through the electronic switch 12 into a DC main power source, A main power supply unit 14 that supplies power to the system 15 and bypasses the sub power supply output from the sub power supply unit 13 and supplies the bypassed power to the system 15, And a system 15 which is supplied with a standby power and outputs a power control signal according to a remote control or a software control and is driven by the main power supplied from the main power supply 14. [

A system power control apparatus using a mechanical switch among the conventional system power control apparatus configured as described above will be described first.

When the plug 1 is connected, AC power is supplied / cut according to the user's operation. When the user turns on the mechanical switch 2, the AC power is supplied to the power supply unit 3. [

Then, the power supply unit 3 converts the AC power supplied through the mechanical switch 2 to a DC power of a certain level and supplies the DC power to the system 4. [

Thus, the system 4 is driven in accordance with the DC power supplied from the power supply unit 3. [

When the user turns off the mechanical switch 2 in order to cut off the power, the supply voltage of the power supply 3 is cut off and the power supplied to the system 4 is also cut off.

Next, a system power control apparatus using an electronic switch will be described.

When the plug 11 is connected, the sub power supply part 13 receives the AC power and converts it into DC power and supplies it to the system 15 via the main power supply part 14 to the standby power.

Thereafter, when the user outputs a power-on signal through a remote controller or software to supply power to the system 15, the system 15 outputs a power-on signal to the main power supply unit 14. [

Then, the main power supply unit 14 drives the electronic switch 12 according to the power-on signal output from the system 15, and the electronic switch 12 is driven to supply the input AC power to the main power supply unit 14).

Accordingly, the main power supply unit 14 converts the alternating current power into the respective direct current power and supplies it to the system 15, and the system 15 is driven by the direct current power supplied from the main power supply unit 14.

When the user outputs a power off signal by a remote controller or software to shut off the power supply of the system 15, the system 15 outputs a power off signal to the main power supply unit 14. [

The main power supply unit 14 turns off the electronic switch 12 according to the power off signal output from the system 15 so that the electronic switch 12 is turned off to shut off the main power of the system 15 do.

However, in the conventional system power control apparatus, when the mechanical switch is used, the power can not be turned on / off by a device such as a remote controller. When the power is turned off, the power is immediately turned off regardless of the operating environment of the system. Thereby causing data corruption of the hard disk driver.

In addition, when the electronic switch is used, the power can be turned on / off by a remote controller or the like, but the power is immediately shut off when the power is turned on / off in various operating environments such as a computer system, .

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a system and method for preventing data loss of a hard disk drive When the power is turned off, the software detects it, restores the system, and then turns off the power to prevent data loss.

Technical means for achieving the object of the present invention are as follows:

A sub power supply means for converting AC power into DC power when the plug is connected and supplying standby power to the power switch control unit in the system,

And a power switch control means for maintaining a standby state with the standby power supplied from the secondary power supply means and outputting a power control signal in response to a remote control or a software control,

An electronic switch for supplying / interrupting the AC power according to the power supply control signal output from the power switch control means in the system,

And main power supply means for converting the AC power supplied through the electronic switch to DC power and supplying the main power to the system.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 is a block diagram of a system power control apparatus according to the present invention. Referring to FIG. 2, when the plug 110 is connected, AC power is applied to convert the AC power into DC power, and the standby power is supplied to the power switch control unit 131 in the system 130 A main power supply unit 120 for supplying power to the main power supply unit 120 and a standby power supply unit for supplying power from the main power supply unit 120 to the main power supply unit 120, An electronic switch 140 that supplies / cuts an AC power according to a power control signal output from a power switch control unit 131 in the system 130, a system 130 including a control unit 131, And a main power supply unit 150 for converting the AC power supplied through the power supply unit 140 to DC power and supplying the main power to the system 130.

FIG. 3 is a detailed circuit diagram of the second power switch control unit 131,

A first OR gate 131a for performing a logical AND of the power control signal according to the operation of the power switch 160 and the power control signal output from the remote control receiver 170 and outputting the resultant signal, A first latch 131b for outputting a power switch control signal fed back in accordance with a signal output from the OR gate 131a; a buffer 131d for buffering and outputting a signal output from the first latch 131b; A second latch 131c for latching and outputting the buffered signal from the buffer 131d and a second latch 131c for outputting the resultant signal to the power control And a second OR gate 103e for outputting a signal as a signal.

The operation and effect of the present invention constructed as described above will be described with reference to FIGS. 4 and 5.

First, when the user connects the plug 110, the sub power supply unit 120 converts the AC power through the plug 110 to DC power and supplies the DC power to the power switch control unit 131 in the system 130 as a sub- .

At this time, the electronic switch 140 is off.

Then, as shown in FIG. 4 (a), the power supply switch control unit 131 supplies the DC power supplied from the secondary power supply unit 120 to a reset (RST *) signal, which is a system clock, 2 latches 131b and 131c are initialized.

Thereafter, the power switch control unit 131 waits for a power control signal generated from the power switch 160 or the remote control signal receiving unit 170. Thereafter, the user turns on the power switch 160 to supply the main power to the system 130 Or when a power-on signal is output using a remote controller (not shown in the attached drawings), one input signal of the first OR gate 131a becomes a high signal, and a high signal .

The first latch 131b synchronizes the power supply control signal output from the second OR gate 131e with the high signal output from the first OR gate 131a, Q to the OR gate 131e as shown in FIG. 4B with a high signal attached thereto.

Then, the second OR gate 131e performs a logical AND operation on the low signal output from the second latch 131c and the high signal output from the first latch 131b, And is output to the electronic switch 140 as a power-on signal as shown in Fig.

Accordingly, the electronic switch 140 is driven to supply AC power through the plug 110 to the main power supply unit 150 as a main power source.

The main power supply unit 150 converts the supplied AC power into DC power and supplies the AC power to the system 130 as a main power source, thereby driving the system 130.

On the other hand, when the user turns off the power switch 160 to turn off the system 130 or uses the remote controller (not shown in the attached drawings) to output the power off signal as shown in FIG. The first and second OR gates 131a and 131b are turned to the low state to output the low signal to the first latch 131b.

Accordingly, the first latch 131b applies the high signal output from the second OR gate 131e to the data terminal and outputs the low signal output from the first OR gate 131a to the clock CLK) terminal and latches it and outputs it to the output terminal Q as shown in FIG.

At this time, the system 130 recognizes the low signal as a power-off signal as shown in FIG. 4 (a), and cuts off the power. In order to prevent the internal hard disk driver data from being damaged, If the program is running as a result of the search, the power-off signal is waited until the program is completed.

The system 130 then outputs a low signal PCSRD * to the buffer 131d and a high signal CLK to the clear terminal CLK of the second latch 131c to interrupt the power supply when the search result program is completed PCSWR *).

The buffer 131d receives the inverted high signal of the low signal PCSRD * output from the system 130 as a driving signal to buffer the low signal output from the first latch 131b and outputs the low signal XDO To the second latch 131c.

The second latch 131c receives a low signal output from the buffer 131d and receives a high signal PCSWR * from the system 130 at a clock terminal CLK to latch a low signal And output to the second OR gate 131e through the output terminal Q as shown in FIG.

The second OR gate 131e performs logic operation on the row signal output from the second latch 131c and the row signal output from the first latch 131b, 4 to the electronic switch 140 as a power-off signal as shown in FIG.

Then, the electronic switch 140 is turned off according to the power off signal output from the power switch control unit 131 to cut off the AC power supplied to the main power supply unit 150.

As described above, according to the present invention, when the power of the system is turned off, in order to prevent the data loss of the hard disk driver in the system setting and operation state, when the system power is turned off, It is possible to prevent the loss of data.

Claims (2)

A sub power supply part 120 for receiving AC power when the plug 110 is connected and converting it into DC power and supplying standby power to the power switch control part 131 in the system 130, A power switch control unit (not shown) that receives standby power supplied from the sub power supply unit 120 and maintains a standby state and outputs a power control signal according to a remote control or software control and receives a main power from the main power supply unit 150 A system 130 comprising: An electronic switch 140 for supplying / cutting off the AC power according to the power control signal output from the power switch control unit 131 in the system 130, And a main power supply unit (150) for converting the AC power supplied through the electronic switch (140) to DC power and supplying the AC power to the system (130) as a main power source. The electronic switch control unit (130) according to claim 1, wherein the electronic switch control unit (130) is configured to perform a logical OR operation between the power control signal according to the operation of the power switch (160) and the power control signal output from the remote control receiver (170) (OR) gate 131a, A first latch 131b for latching and outputting a power supply control signal according to a signal output from the first OR gate 131a, and a second latch 131b for buffering and outputting the signal output from the first latch 131b A buffer 131d, a second latch 131c for latching and outputting a signal buffered from the buffer 131d, And a second OR gate 131e for performing a logical OR of the signals output from the first and second latches 131b and 131c and outputting a resultant signal as a power supply control signal. .