KR100326792B1 - Apparatus for retrenching power dissipation using halt mode - Google Patents

Abstract

The present invention relates to an apparatus for reducing power consumption using a stop mode, and to stop operation of a plurality of external interrupts using a stop mode when a standby power is supplied, and to use a timer operating frequency (32.968 KHz) output from the crystal oscillator. The present invention relates to a power saving device using a stop mode that can optimize the power consumption of a standby power supply by operating only a timer.

Therefore, unnecessary waste of power consumption can be prevented, the functions of each element constituting the main power supply circuit, standby power supply circuit, external interrupt, etc. can be smoothly performed, and the average life span of each device can be extended.

Description

Apparatus for retrenching power dissipation using halt mode}

The present invention relates to an apparatus for reducing power consumption using a stop mode, and more particularly, using a stop mode during standby power supply to stop operations such as a plurality of external interrupts and using a timer operating frequency output from the crystal oscillator. The present invention relates to a power saving device using a stop mode that can optimize the power consumption of a standby power supply by operating only a timer.

In general, electronic devices such as televisions or video tape cassettes that require a standby power supply consume power in the standby mode. Since the power consumption in the standby mode of the current electronic device is more than 6 to 10 Watt, it is necessary to reduce the power consumption in the standby mode.

Particularly, in Europe, power consumption is regulated to be within 5 Watts in standby mode. Therefore, export goods to Europe must inevitably reduce power consumption in standby mode in order to avoid regulation. Even devices need to reduce power consumption in standby mode.

Hereinafter, with reference to the accompanying drawings will be described with respect to the conventional power consumption saving device.

1 is a circuit diagram showing the configuration of a conventional power saving device.

As shown in FIG. 1, the conventional power saving device includes a rectifier 1 for rectifying AC power and a DC / DC converter for outputting a DC power rectified by the rectifier 1 to a DC voltage required by an electronic device. 2), a relay 3 for intermittently supplying the main power output from the DC / DC converter 2 to the load 4 under the control of the microcomputer 7, and a standby power supply from the DC / DC converter 2; A microcomputer 7 for outputting a relay 3 driving signal, an oscillator 6 for outputting a pulse width modulation (PWM) pulse according to the output of the main power supply of the DC / DC converter 2, and an oscillator 6 A photocoupler 5 insulated from the transistor Q1 that controls the driving of the DC / DC converter 2 and the main power supply of the DC / DC converter 2 and supplied to the oscillation unit 6 by being switched by a PWM pulse of Is achieved by

In such a conventional power saving device, when AC power is supplied, AC power is rectified from the rectifier 1 to DC power, and then is applied to the DC / DC converter 2 and output as a main power and standby power. The standby power output from the DC converter 2 is applied to the microcomputer 7 as drive power. At this time, the main power output from the DC / DC converter 2 is not supplied to the load 4 unless the user presses the power key to drive the relay 3 in the microcomputer 7 that recognizes it. Therefore, there is no consumption of main power until it is powered on.

However, some of the main power supply of the DC / DC converter 2 is applied to the oscillation unit 6 through the photocoupler 5 for insulation of the hot power supply and the cold power supply, and the oscillation unit 6 is a photoelectric device. The PWM pulse is output by the voltage magnitude of the main power source applied through the coupler 5.

The PWM pulse of the oscillator 6 controls the driving of the transistor Q1, which is a switching element, and according to the driving of the transistor Q1, the DC / DC converter 2 is normally driven to have a main power supply and a standby power supply having a constant voltage on the output side. Outputs Therefore, even in the standby mode, the oscillator 6, the transistor Q1, and the DC / DC converter 2 should be driven all the time, and most of the standby power consumption in the standby board is provided in the DC / DC converter 2 and the transistor Q1. Consumed.

In the conventional power saving device, when the standby power is supplied, power is supplied to the main of the television set, but power is supplied to the standby circuit, and power is continuously supplied to the standby circuit even when the main is turned on.

In addition, DC / DC converter, transistor, and oscillator should be operated continuously to generate standby power, but in standby mode, microcomputer consumes 1 Watt of small power in standby mode. There is a problem in that unnecessary power consumption is consumed by the / DC converter and transistor.

By supplying the crystal oscillation frequency to 12 MHz during standby power supply, the microcomputer operates in the normal mode and supplies unnecessary power to each device such as an external interrupt, thereby preventing the smooth operation of each device and reducing the lifetime of the devices. There is a problem that results.

The present invention has been made to solve the conventional problems as described above, the object of the present invention is to stop and modify the operation of the external interrupt in accordance with the output signal using the stop mode of the microcomputer in supplying standby power By using a vibrator to operate the timer at the oscillation frequency of 32.968 KHz to provide a power saving device using the stop mode that can optimize the unnecessary power consumption when the standby power supply.

Another object of the present invention is to operate the power supply port of the microcomputer, the remote control receiving port and the timer operation port to minimize the power consumption when the standby power supply to remove unnecessary power consumption to configure the main power circuit, standby power circuit and external interrupt, etc. It is to provide a device for reducing power consumption using a stop mode to smoothly perform the function of each device, and to extend the average life of each device.

1 is a circuit diagram showing the configuration of a conventional power saving device.

Figure 2 is a block diagram for showing the configuration of the present invention.

3 is a circuit diagram showing one embodiment of the present invention.

♣ Explanation of symbols for the main parts of the drawing ♣

20: key mattress circuit 21: receiver

22: power input unit 23: rectifier

24: DC / DC converter section 25: constant voltage circuit section

26: voltage delay unit 27: microcomputer

28: switching unit 29: crystal oscillation unit

29a: inverter 29b: crystal oscillation circuit

30: timer 31: relay drive unit

32: external interrupt operation unit X-TAL: crystal oscillator

In order to achieve the above object, the present invention provides a key mattress circuit unit 20 attached to a television main body for inputting a key signal, a receiver 21 for receiving an infrared signal transmitted from the remote controller 21a, and a power cord. Power input unit 22 for supplying AC power, rectifier 23 for converting AC power to DC power, DC / DC for converting and converting the converted DC power to AC power and rectifying and converting the reconverted AC power. The converter 24, the constant voltage circuit 25 for maintaining the DC power rectified and smoothed by the DC / DC converter 24 as a constant power supply, and the main power output from the constant voltage circuit 25 by RC time constants. Receives a voltage delay unit 26, a signal output from the key mattress circuit unit 20, a signal output from the receiver 21 and a signal output from the voltage delay unit 26 to output a predetermined control signal Whole component In the power saving device for saving standby power, which is composed of the microcomputer 27 for controlling, the transistor Q1 for switching the operation of the DC / DC converter unit 24 according to the control signal of the microcomputer 27 is configured. A switching unit 28; A crystal oscillation unit 29 for generating a predetermined frequency by the control signal of the microcomputer 27 according to whether the signal is transmitted from the key mattress circuit unit 20 and the reception unit 21; A timer 30 for counting time according to the signal output from the crystal oscillator 29 and the control signal of the microcomputer 27; A relay driver 31 for turning on / off a switch of the relay in accordance with a control signal output in the stop mode of the microcomputer 27; External interrupt operation unit 32 for receiving the main power output from the voltage delay unit 26 by the relay drive unit 31 to operate an external interrupt, etc .;

Hereinafter, a preferred embodiment of the power saving device using the stop mode according to the present invention will be described in detail with reference to the accompanying drawings.

2 is a block diagram for showing the configuration of the present invention, Figure 3 is a circuit diagram for showing an embodiment of the present invention.

The key mattress circuit unit 20 is installed so as to correspond to a key panel attached to the main body of the television to input a key signal, and the receiver 21 is optically connected to the remote controller and receives an infrared signal transmitted from the keys of the remote controller.

The power input unit 22 inputs an AC signal transmitted to the power cord, and the rectifier 23 is connected to the power input unit 22 and converts the AC signal transmitted from the power input unit 22 into a DC signal. The rectifier 23 uses one of a half-wave rectifier using a transformer, a full-wave rectifier using a mid-tap transformer, a bridge full-wave rectifier circuit, a rectifier filter, and the like.

The DC / DC converter unit 24 is connected to the rectifying unit 23 and the switching unit 28 and converts the DC power output from the rectifying unit 23 into AC power, and then rectifies the DC power by stepping up or down by a transformer. Perform the transformer. The constant voltage circuit unit 25 is connected to the DC / DC converter unit and maintains the DC power output from the DC / DC converter unit 24 as the electrostatic source (+ 5V) of the microcomputer 27. The constant voltage circuit section includes a constant voltage circuit using a pass-transistor, a Darlington pass-transistor, a series constant voltage circuit using a feedback circuit, a constant voltage circuit using an operational amplifier, a switching constant voltage circuit, and an IC constant voltage circuit. Choose one from the back. In an embodiment of the present invention, a step-down type constant voltage regulating circuit is used among switching constant voltage circuits.

The voltage delay unit 26 is connected to the constant voltage circuit unit 25 and delays the DC power output from the constant voltage circuit unit 25 by the RC time constant. The voltage delay unit 26 temporarily delays the constant voltage circuit unit 25 until the DC / DC converter unit 24 is driven during the power-on operation to supply the electrostatic source of the microcomputer 27 to be described later. By transmitting, it serves to prevent the phenomenon that the electrostatic source applied to the microcomputer 27 is temporarily cut off during the power-on operation.

The microcomputer 27 is connected to the keyless circuit 20, the receiver 21, and the voltage delay unit 26 and controls the entire component. The switching unit 28 is connected to the microcomputer 27 and is turned on / off by the control signal of the microcomputer 27 to determine whether the DC / DC converter unit 24 is operated. In the present invention, a transistor is used.

The crystal oscillator 29 is connected to the microcomputer 27 and oscillates when the signals output from the inverter 29a and the inverter 29a which invert the signals output from the microcomputer 27 when the main power source and the standby power supply are high signals. The crystal oscillation circuit 29b is configured to generate a frequency and not generate an oscillation frequency when the signal is low. The crystal oscillator X-TAL of the crystal oscillator circuit 29b generates an oscillation frequency of 32.968 KHz to start the timer 30 described later when the standby power is supplied. The crystal oscillation circuit includes a C-B pierce crystal oscillation circuit, an emitter feedback crystal oscillation circuit, and the like, but the present invention uses an easy-to-adjust C-B pierce crystal oscillation circuit.

The timer 30 is connected to the microcomputer 27 and the crystal oscillator 29 and counts the time by the control signal of the microcomputer 27, and when the main power is supplied, the control signal is directly applied by the microcomputer 27 and standby. When the power is supplied, it is operated by the oscillation frequency of 32.968 KHz generated from the crystal oscillation unit 29. The relay driver 31 is connected to the microcomputer 27 and turns the relay on / off by a signal output from the stop mode terminal (port 6) of the microcomputer 27, and the external interrupt operation unit 32 is the relay driver 31. And an external interrupt, etc., by the power output from the voltage delay unit 26 as the switch of the relay driver 31 is turned on / off.

According to an embodiment of the present invention, as shown in FIG. 3, the keyless circuit unit 20 is input to the terminal (port 1) of the microcomputer 27, and the receiver 21 is the terminal (port 2) of the microcomputer 27. ). When AC power is input from the power cord, this AC power is input to the anode terminal of the diode D1 in the rectifier 23, and the cathode terminal is connected in parallel with the capacitor C1 and grounded, and the DC / DC converter unit ( It is connected to the primary coil of 24 and commonly connected to the collector terminal of the transistor Q1. One terminal of the secondary coil of the DC / DC converter unit 24 organically coupled with the primary coil of the DC / DC converter unit 24 is grounded, and the other terminal is connected to the anode terminal of the diode D2. . The cathode terminal of the diode D2 is connected in parallel with the capacitor C2 and grounded, and is connected to the collector terminal of the transistor Q2 in the constant voltage circuit section 25.

The base terminal of the transistor Q2 is connected to the base terminal of the transistor Q1, the emitter terminal is connected in parallel with the cathode terminal of the zener diode D3, and the anode terminal of the zener diode D3 is grounded. In addition, the emitter terminal of the transistor Q2 is grounded in parallel with the resistor R1, at the same time in series with the resistor R2 of the voltage delay unit 26, and in parallel with the capacitor C3. The output terminal of the voltage delay unit 26 is input to the terminal (port 3) of the microcomputer 27.

The terminal (port 4) of the microcomputer is the base terminal of the transistor Q1 in the switching section 28 and the base terminal of the transistor Q2 in the constant voltage circuit section 25 and the inverter 29a in the crystal oscillation section 29. It is commonly connected to the input terminal and the input terminal of the timer 30.

The output terminal of the inverter 29a is commonly connected to one terminal of the crystal oscillator X-TAL, the collector terminal of the transistor Q4, and the capacitor C5, and the other terminal of the crystal oscillator X-TAL is connected to the transistor ( The base terminal of Q4) is connected to the capacitor C4 and the capacitor C5 in common, and the emitter terminal of the transistor Q4 is connected to the input terminal of the timer 30.

The input terminal of the timer 30 is connected to the terminal (port 4) of the microcomputer 27 and the emitter terminal of the transistor Q4 in the crystal oscillator 29, and the output terminal is connected to the terminal (port 5) of the microcomputer 27. Is entered.

The stop mode (port 6) of the microcomputer 27 is connected to the base terminal of the transistor Q3 in the relay driver 31, the emitter terminal is grounded and the collector terminal is connected to the coil. One terminal of the switch in the relay driver 31 is connected to the output terminal of the voltage delay unit 26, and the other terminal of the switch is connected to the external interrupt operation unit 32.

Referring to the operation state for the power consumption saving device using the stop mode according to the present invention as described above are as follows.

First, the main power supply will be described.

When the user presses the power key attached to the television main body or the power key mounted on the remote controller to turn on the power, the microcomputer 27 receives a key signal input to the terminal (port 1 or port 2) and recognizes the state of main power. do. Recognizing that the main power is in the state of the microcomputer 27, the base terminal of the transistor Q1 in the switching unit and the base terminal of the transistor Q2 in the constant voltage circuit unit 25, the input terminal of the crystal oscillation unit 29 and the timer 30 Send a high signal to.

As the AC power input from the power cord passes through the rectifying unit 23 and is converted to DC power, the transistor Q1 is turned on by the high signal input to the base terminal of the transistor Q1, whereby the DC / DC converter unit 24 The current flows through the primary coil of. An organic electromotive force is generated in the secondary coil by the current flowing through the primary coil, and is reconverted into a direct current power supply by the rectifying section 24a and applied to the collector terminal of the transistor Q2 of the constant voltage circuit section 25. Since the base terminal of the transistor Q2 is connected to the high signal output from the terminal (port 4) of the microcomputer 27, the transistor Q2 is turned on and the drive power supply of the microcomputer 27 is driven by the zener diode D3. Stabilized to + 5V).

The power stabilized by the constant voltage circuit section 25 is delayed by the RC time constant of the voltage delay section 26 and input to the terminal (port 3) of the microcomputer 27. The reason for delaying the RC time constant is that the DC / DC converter unit 24 is driven during the power-on operation to temporarily delay the constant voltage circuit unit 25 until the DC / DC converter unit 24 supplies the electrostatic source (+ 5V) of the microcomputer 27. In order to prevent the phenomenon in which the electrostatic source applied to the microcomputer 27 is temporarily cut off during the power-on operation, In addition, the power output from the voltage delay unit 26 is connected to the switch terminal of the relay driver 31.

In the stop mode (port 6) of the microcomputer 27, the high signal is applied to the base terminal of the transistor Q3 of the relay driver 31 in the main power state. By the high signal, the transistor Q3 is turned on, the relay is driven, and the switch is turned on, so that an electrostatic source (+ 5V) applied at the output terminal of the voltage delay unit 26 is input to the external interrupt operation unit 32, thereby Interrupts, etc. will be activated.

In addition, since the high signal output from the terminal (port 4) of the microcomputer 27 is inverted into a low signal by the inverter 29a of the crystal oscillator 29, the crystal oscillation circuit 29b does not operate, and the timer 30 The input terminal of is driven by the high signal output from the terminal (port 4) of the microcomputer 27 to count the time.

Next, we will look at the standby power supply.

When the user presses the power key attached to the television main body or the power key mounted on the remote control, the microcomputer 27 receives a key signal input to the terminal (port 1 or port 2) and recognizes the standby power state. do. Recognizing the standby power state, the microcomputer 27 includes the base terminal of the transistor Q2 in the constant voltage circuit section 25 and the base terminal of the transistor Q1 in the switching section 28, the crystal oscillator section 29, and the timer 30. Transmit the low signal to the input terminal of).

Since the low signal output from the terminal (port 4) of the microcomputer 27 is input to the base terminal of the transistors Q1 and Q2 and the transistors Q1 and Q2 are turned off, the DC / DC converter unit 24 and the constant voltage circuit unit 25 and the voltage delay unit 26 do not operate. In addition, in the stop mode (port 6) of the microcomputer 27, since the standby power supply state, the low signal is applied to the base terminal of the transistor Q3 of the relay driver 31. The transistor Q3 is turned off by the low signal and the relay is not driven so that the switch is turned off, so that the electrostatic source (+ 5V) applied at the output terminal of the voltage delay unit 26 is cut off and the external interrupt operation unit 32 is turned off. Does not work. On the other hand, since the high signal output from the terminal of the microcomputer 27 is inverted to a high signal by the inverter 29a of the crystal oscillator 29, the crystal oscillator (X-TAL) is operated by this high signal to achieve 32.968 KHz. Oscillation frequency occurs. Here 32.968 KHz is the frequency at which the timer 30 is started.

The timer 30 is not activated by the low signal output from the terminal (port 4) of the microcomputer 27, but the timer 30 is activated by the oscillation frequency of 32.968 KHz output from the crystal oscillator 29. Count. The reason for operating the timer 30 when the standby power is supplied is to perform the function at the function setting time by counting the current time when the user sets the on time function and the reservation function.

The above embodiments are merely illustrative of the preferred embodiments of the present invention, and the scope of application of the present invention is not limited to these, and may be appropriately changed within the scope of the same idea. For example, the shape and structure of each component specifically shown in the embodiment of the present invention can be modified. In addition, the present invention can be widely used in various ways.

As described above, according to the apparatus for reducing power consumption using the stop mode according to the present invention, there is an effect of preventing unnecessary waste of power consumption by only operating a timer when a standby power is supplied.

In addition, it is possible to smoothly perform the functions of each device constituting the main power supply circuit, the standby power supply circuit, and an external interrupt, and to extend the average life of each device.

Claims (3)

A key mattress circuit portion 20 attached to the television body for inputting a key signal, a receiving portion 21 for receiving an infrared signal transmitted from the remote control 21a, and a power input portion 22 for supplying AC power via a power cord; A rectifying unit 23 for converting the AC power into a DC power source, a DC / DC converter unit 24 for converting the converted DC power into AC power and rectifying and smoothing the reconverted AC power; The constant voltage circuit part 25 which maintains the DC power rectified and smoothed by the DC / DC converter part 24 as a constant power supply, and the voltage delay part which delays the main power output from the constant voltage circuit part 25 by RC time constant. (26), the signal output from the key mattress circuit unit 20, the signal output from the receiver 21 and the signal output from the voltage delay unit 26 is received and outputs a predetermined control signal for the overall configuration To call In the power saving device for reducing the standby power is composed of a microcomputer 27 for controlling, A switching unit 28 for switching the operation of the DC / DC converter unit 24 according to the control signal of the microcomputer 27; A crystal oscillator (29) for generating a predetermined frequency by the control signal of the microcomputer (27) according to the standby mode signal transmitted from the key mattress circuit (20) and the receiver (21); A timer (30) for counting time according to the signal output from the crystal oscillator (29) and the control signal of the microcomputer (27); A relay driver 31 turned on / off according to the control signal of the microcomputer 27; External interrupt operation unit 32 for receiving the main power output from the voltage delay unit 26 by the relay drive unit 31 to operate an external interrupt; power consumption using the stop mode, characterized in that consisting of Saving device. The crystal oscillator (29) of claim 1, further comprising: an inverter (29a) for inverting a signal output from the microcomputer (27) when the main power supply and the standby power supply are supplied; When the signal output from the inverter 29a is a high signal, the oscillation frequency is generated, and when the low signal is a crystal oscillation circuit (29b) configured not to generate the oscillation frequency; power consumption reduction using the stop mode, characterized in that consisting of Device. 3. The apparatus of claim 2, wherein the crystal oscillation circuit (29b) generates an oscillation frequency of 32.968 KHz to operate the timer (30) when the standby power is supplied.