KR970000259B1 - Apparatus and method for controlling power of monitor - Google Patents

Abstract

a monitor main power provider for providing source power to the each part constructing a monitor using only AC source; a brown tube pre-heater for pre-heating the monitor brown tube by comprising switch power supply to make DC source and AC source all usable; a monitor source power provider for controlling the source power inputted to the monitor main power provider and brown tube pre-heater according to the waveform of source inputted from the body; a main processor for inputting the control signal for controlling source power - inputted to the monitor from the source power part and source power part for providing the source power to each part of the body and for inputting AC source by rectifying source power necessary for the monitor according to control signal.

Description

Monitor power control method using AC waveform and its device

1 is a simplified block diagram of a computer having a monitor power control device according to the present invention.

FIG. 2 is a detailed circuit diagram of a configuration for monitor power control among the components shown in FIG.

* Explanation of symbols for main parts of the drawings

100: keyboard 200: computer body

210: main processor 220: video processing unit

230: power supply unit 231: control signal determination unit

232: waveform conversion unit 300: monitor

310: CRT 320: monitor power supply

330: monitor main power supply 340: CRT preheater

R1, RW, R3, R4, R5: Resistor OP: Comparator

D1, D2: Diode SCR: Light Emitting Silicon Rectifier

RY: relay switch C: capacitance

The present invention relates to a monitor power control method and apparatus for office equipment using the monitor or the character display means of the present invention. A monitor power control method using an AC waveform and a device therefor.

In general, a power-saving PC, commonly called a green computer, automatically shuts down the monitor, which takes up most of the power consumption of the actual PC when the user stops working for a certain period of time while using the PC. It refers to a PC that is designed for the purpose of reducing the consumption of power that is wasted.

Some of the typical control schemes among the conventional monitor power control schemes for shutting off the power supplied to the monitor on a PC designed for efficient management of power consumption as described above will briefly describe the interface unit for data connection between the main unit and the monitor. The first method of completely shutting off the power supplied to the monitor through the power supply, and the various control signals and data generated from the main body is supplied to a specific input terminal from the power supply unit for supplying power to the main body and the monitor and transmitted from the monitor power supply terminal to the monitor Monitor power consumption by blocking horizontal sync and vertical sync to compose the screen by judging whether there is a change in the horizontal or vertical sync signal of the video signal transmitted from the video card of the main body and the second method to cut off the power using a relay or a triac. Monitors to ensure that There is a third method for providing.

However, the second method of the conventional control methods as described above is complicated to control the power supply of the monitor, the third method is the power supply to the auxiliary power supply and the circuit of the horizontal and vertical synchronization signal detection part of the monitor continuously In particular, the first method includes problems such as a time delay in displaying an image on a screen because the monitor CRT preheating time takes a predetermined time.

An object of the present invention for solving the problems of the conventional methods as described above is to use a heater power source that is a CRT preheater by applying a half-wave signal to the monitor when the monitor power is cut off using an AC power source, that is, an AC waveform. The present invention provides a method and apparatus for controlling a monitor power using an AC waveform for allowing a computer user to use the computer without generating a heating time at the same time as a keyboard input by applying an AC waveform in a normal operation.

A feature of the present invention is to achieve the above object, by receiving a monitor for displaying the character key data generated from the keyboard on the screen and the key data generated from the keyboard to perform a function corresponding to the key data or image data A monitor power control apparatus in a power saving type computer having a main body for processing and outputting and appropriately controlling power required for the monitor, comprising: a monitor main power supply for supplying power to each part of the monitor using only AC power; And a switch power supply for using both a DC power source and an AC power source, and a CRT preheater for preheating the CRT of the monitor, and applied to the monitor main power supply and the CRT preheater according to a waveform of a power applied from the main body. To control the power A monitor power supply unit and a power supply for rectifying the power supply required for the monitor by rectifying AC power in half-wave according to a control signal and supplying power to each part of the main body, and controlling the power applied to the monitor from the power supply unit. And a main processor for applying a control signal to the power supply unit.

Another feature of the present invention to achieve the above object, the power required for preheating the CRT is a monitor power control method in a power-saving computer having a monitor that can be used with either direct current or alternating current power, the power of the monitor must be shut off In the first step of determining whether or not to shut down the power of the monitor in the first step, and the second step of rectifying the AC power applied to the monitor to the DC power and the power rectified in the second step of the monitor The third step is to use as a driving power source for each component.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a simplified block diagram for facilitating the description of the operation of the monitor power control device in a computer having the monitor power control device according to the present invention. The keyboard 100 for inputting data and the keyboard 100 The monitor 300 for displaying the character key data generated on the screen and the key data generated from the keyboard 100 are applied to perform a function corresponding to the key data or to output the image data by processing the image data. It consists of the computer main body 200 which controls the power supply required for 300 suitably.

The monitor 300 includes a CRT 310 for displaying characters or image data applied from the computer main body 200 to the outside, and a monitor main power supply unit for supplying power to each part of the monitor 300. 330 and a switch power supply for using both a DC power source and an AC power source, and the CRT preheater 340 for preheating the CRT 310 and the waveform of the power applied from the computer main body 200. And a monitor power supply 320 for controlling power applied to the monitor main power supply 330 and the CRT preheater 340.

In addition, the computer main body 200 applies a video processor 220 for image processing to display text or image data on the CRT 310 of the monitor 300, and applies power to the monitor 300, and The power supply unit 230 for supplying power to each part of the computer main body 200 and key data generated from the keyboard 100 are applied to perform a function corresponding to the key data or the video processing unit 220. And a main processor 210 for applying a control signal to the power supply unit 230 to control the power applied to the monitor 300 from the power supply unit 230.

Referring to Figure 2 attached to the monitor power control device provided in the power-saving PC configured as described above is as follows.

2 is a detailed circuit diagram illustrating a power control process according to the present invention in the power supply unit 230 and the monitor power supply unit 320 of FIG.

The power supply unit 230 receives a control signal output from the main processor 210 to determine a characteristic of the control signal, and a control signal determination unit 231 and a determination signal output from the control signal determination unit 231. It is composed of a waveform switching unit 232 for applying the power supplied to the monitor 300 in response to the determination signal in an AC waveform or a half-wave rectified form.

The control signal determination unit 231 applies a first resistor R1 receiving the control signal output from the main processor 210 and a predetermined positive voltage (for example, + 5V) applied from the positive voltage input terminal. The output signal of the third resistor (R3) and the first resistor (R1) for receiving the second resistor (R2) and the output voltage of the second resistor (R2) to be connected to ground is applied to the non-inverting input terminal. And the comparator OP receiving the output signal of the second resistor R2 to the inverting input terminal.

The waveform converting unit 232 generates a fourth resistor R4 connected to the determination signal output terminal of the control signal determination unit 231 and the positive voltage input terminal, and a determination signal of the control signal determination unit 231. Output from the second output terminal of the light-emitting silicon controlled rectifier (SCR) and the light-emitting silicon controlled rectifier (SCR), which is applied to the first input terminal, is applied to one end of the AC power input terminal, and is connected to the second input terminal. The signal is applied to an input terminal and the output terminal includes a first diode D1 connected to the second input terminal.

In addition, the monitor power supply unit 320 is a second diode (D2) for receiving a signal output from the second output terminal of the light emitting silicon controlled rectifier (SCR) to the input terminal and the output terminal to the input terminal of the second diode (D2). A third diode D3 connected to the CRT preheater 340 and an input terminal, a fifth resistor R5 receiving an output signal of the second diode D2, and the fifth resistor The relay switch RY and the fifth resistor R5 that connect or short the signal output from the second output terminal of the light emitting silicon controlled rectifier SCR according to the output signal of R5) to the monitor main power supply 330. It is composed of a capacitance (C) connected between the input terminal and the output of the relay switch (RY), and is connected to the second input terminal of the light emitting silicon controlled rectifier (SCR) at the AC power input terminal of the power supply unit 230. The other stage that is not Mains power supply unit connected to the emitter 330 and the cathode-ray tube warm-up unit 340, and is connected to the output terminal to the relay switch (RY).

Hereinafter, a preferable operation example of the monitor power control device according to the present invention and the computer provided with the device are configured as described above.

When the user is performing normal operations using the keyboard 100, that is, the main processor 210 receiving the key data signal from the keyboard 100 maintains the control signal applied to the power supply unit 230 in a high state. However, when the main processor 210 determines that a situation such as when the user stops the work for a predetermined time or more or does not shut off the main body and the monitor and leaves the seat for a predetermined time or more occurs, the power supply unit The control signal applied to the high state at 230 is switched to the low state.

The comparator OP in the control signal determining unit 231 which receives the low state control signal output from the main processor 210 is compared with the voltage applied to the inverting input terminal. The voltage applied depends on the resistance ratio of the second resistor R2 and the third resistor R3. However, in the present invention, the resistance values of the second resistor R2 and the third resistor R3 are the same. Explain.

Therefore, since the voltage applied to the inverting input terminal of the comparator OP is 5V applied to the second resistor R2, about 2.5V is applied. The control applied to the non-inverting input terminal in the main processor 210 is applied. Since the state of the signal is low, the output signal of the comparator OP is output in the low state.

At this time, since the output signal of the comparator OP, that is, the output signal of the control signal determining unit 231 is in a low state, a predetermined positive voltage applied to the fourth resistor R4 in the waveform switching unit 232 is applied to the fourth resistor ( Since voltage drop occurs in R4), the output voltage of the fourth resistor R4 becomes a zero voltage.

Thereafter, the light emitting diode in the light emitting diode controlled rectifier (SCR) that receives the output voltage of the fourth resistor R4 to the first input terminal does not emit light because no current flows. Therefore, the light emitting diode emits light when the light emitting diode emits light. Silicon controlled rectifiers that output a voltage applied by them do not operate.

Then, the commercial AC power applied to the second input terminal of the light emitting silicon controlled rectifier SCR by a first diode D1 connected between the second output terminal and the second input terminal of the light emitting silicon controlled rectifier SCR is a half wave. It is rectified to state.

In this case, the monitor 300 receives an AC voltage rectified by a half wave output from the waveform converting unit 232, and thus, a second of the light emitting silicon control rectifier SCR is input at an AC power input terminal of the power supply unit 230. Both potentials are formed only at the power input terminal which is not connected to the input terminal and is connected to the monitor main power supply unit 330, the brown and the preheating unit 340, and the output terminal of the relay switch RY.

Therefore, since no positive potential is formed at the input terminal of the second diode D2, no current flows through the relay switch RY and the fifth resistor R5. The relay switch RY is turned off because no current flows, so that the monitor main power supply 330 is a half-wave positive potential of a power input terminal that is not connected to the second input terminal of the light emitting silicon controlled rectifier SCR, that is, a direct current. Since power is applied, normal operation is impossible, so the power supplied to the monitor is cut off.

In addition, the CRT preheater 340 receives a half-wave positive potential, that is, a DC power supply of a power input terminal that is not connected to the second input terminal of the light emitting silicon controlled rectifier (SCR), but the power used in the CRT heater. Since large power is not used and the present invention uses a separate switch power supply circuit to use a DC voltage, the preheating operation of the CRT is continuously performed.

Thereafter, when an arbitrary key data signal is applied from the keyboard 100 by the user, the main processor 210 converts the control signal to a high state and outputs the result. Therefore, the output signal of the comparator OP is also output to the high state. .

Since the light emitting silicon controlled rectifier SCR receiving the output signal of the comparator OP is normally operated, the relay switch RY is turned on, and the monitor 300 is then preheated even when the monitor is powered off. Therefore, the screen is displayed without preheating delay time.

A monitor power control method using the AC waveform operating as described above and a device therefor, the circuit for controlling the power supply of the monitor in the conventional monitor power control scheme is complicated or the auxiliary power and horizontal vertical synchronization signal detection part inside the monitor The circuit of the power supply must be continuously supplied, or in particular, since the monitor CRT preheating time takes a certain time, there is an effect of eliminating problems such as a time delay in displaying an image on the screen.

Claims (7)

A monitor for displaying the character key data generated from the keyboard on the screen and the key data generated from the keyboard are applied to perform a function corresponding to the key data or to output the image data and to control the power required for the monitor accordingly. 1. A monitor power control apparatus in a power saving type computer having a main body, comprising: a monitor main power supply for supplying power to each part of the monitor using only an AC power source; A cathode tube preheating unit for preheating the cathode ray tube of the monitor, having a switch power supply so as to use both an DC power source and an AC power source; A monitor power supply for controlling the power applied to the monitor main power supply and the CRT preheater according to the waveform of the power applied from the main body; The power supply unit rectifies and applies AC power in half-wave according to a control signal, and supplies a power supply unit for supplying power to each part of the main body, and a control signal for controlling power applied to the monitor from the power supply unit. Monitor power control device using an AC waveform comprising a main processor for applying to. The apparatus of claim 1, wherein the power supply unit comprises: a control signal determination unit configured to determine a property of the control signal by receiving a control signal output from the main processor; AC waveform, characterized in that consisting of a waveform switching unit for receiving the determination signal output from the control signal determination unit for applying the power supplied to the monitor in an AC waveform or a half-wave rectified form according to the determination signal Monitor power control device using a. The display apparatus of claim 2, wherein the control signal determiner comprises: a first resistor receiving a control signal output from the main processor; A second resistor receiving a predetermined positive voltage; And a third resistor configured to receive the output voltage of the second resistor and to be connected to ground, and a comparator configured to receive an output signal of the first resistor to a non-inverting input terminal and receive an output signal of the second resistor to an inverting input terminal. Monitor power control device using an AC waveform. The display device of claim 2, wherein the waveform changer is configured to receive a predetermined positive voltage and has a fourth resistor connected to a determination signal output terminal and an output terminal of the control signal determination unit; A light emitting silicon control rectifier and a second output terminal of the light emitting silicon control rectifier, wherein the control signal determining unit receives a determination signal from a first input terminal, receives an end of an AC power input terminal from a second input terminal, and connects a first output terminal to ground. Monitor power control device using an AC waveform, characterized in that the signal output from the input terminal is applied to the output terminal is connected to the second input terminal. The display device of claim 1, wherein the monitor power supply unit comprises: a second diode configured to receive a signal output from a second output terminal of the light emitting silicon controlled rectifier to an input terminal; A third diode having an output terminal connected to an input terminal of the second diode and having a CRT preheater and an input terminal connected thereto; A fifth resistor receiving the output signal of the second diode; A relay switch for connecting or shorting a signal output from the second output terminal of the light emitting silicon controlled rectifier according to the output signal of the fifth resistor to the monitor main power supply, and between an input terminal of the fifth resistor and an output terminal of the relay switch Monitor power control device using an AC waveform, characterized in that the capacitance is made. 6. The terminal of claim 5, wherein the other end of the power input unit, which is not connected to the second input terminal of the light emitting silicon controlled rectifier, is connected to the monitor main power supply unit and the CRT preheater and connected to the output terminal of the relay switch. Monitor power control device using an AC waveform, characterized in that. A power source for preheating the CRT is a monitor power control method in a power-saving computer equipped with a monitor that can be used with either direct current or alternating current, comprising: a first step of determining whether the monitor should be powered off; If it is determined that the monitor is to be cut off in the first step, the rectified AC power applied to the monitor is converted into DC power, and the rectified power in the second step is used as driving power for each component of the monitor. Monitor power control method using the AC waveform, characterized in that it comprises a third step.