KR19990019818A - Power supply control circuit - Google Patents

Abstract

The disclosed control circuit is intended to reduce power consumption in standby mode in various video and audio devices such as television receivers and audio systems.

The present invention provides a first controller that controls the overall operation of the device and has a high power consumption, and a second controller that operates in the standby mode to control the power on and off and has a low power consumption. The power supply to the first controller is cut off, the second controller is continuously supplied with power to maintain the operation state, and the signal of the power key is inputted, and as the signal of the power key is input, the first controller is turned on. And to control the off, and in the standby mode, only the second controller with low power consumption may operate to reduce power consumption.

Description

Power supply control circuit

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply control circuit for reducing power consumption in a stand-by mode in various video and audio devices including television receivers and audio systems.

With the development of electric and electronic technology, remote control technology has been introduced and used to allow users to more conveniently control control devices such as various video devices and audio devices including television receivers and audio systems.

In order to remotely control the control devices, the control device is operated in a standby mode when AC power is supplied by inserting a power plug of the control device into a power outlet.

In the state where the control device is operating in the standby mode, the power is turned on and off by pressing the power key provided in the control device or the power key provided in the remote control transmitter.

This conventional technique will be described in detail with reference to the drawings of FIG. 1.

1 is a circuit diagram showing the configuration of a conventional power supply control circuit.

Here, reference numeral 1 denotes a controller embedded in a control device such as a video device and an audio device to control overall operation of the device, and reference numeral 2 denotes a power supply unit for supplying operation power to each part of the control device.

The power supply unit 2 is configured to insert a power plug 3 into a power outlet (not shown) to continuously supply operating power to the controller 1 as AC power is supplied.

Reference numerals 4 and 5 denote main memory and auxiliary memory connected to the controller 1, and the main memory 4 stores and outputs a predetermined operation program necessary for the operation of the controller 1, and the auxiliary memory 5 The controller 1 stores and outputs a current state value and the like in which the controller 1 controls the operation of the control device.

Reference numeral 6 denotes a key signal output unit for inputting a key signal according to a user's operation to the controller 1, and reference numeral 7 denotes a load of a control device which performs a predetermined operation according to the control of the controller 1.

A power switching unit 8 is provided between the power supply unit 2 and the load 7 so that the power switching unit 8 supplies the power of the power supply unit 2 to the load 7 according to the control of the controller 1. It is to be supplied and shut off.

In the conventional power control circuit configured as described above, when AC power is supplied to the power supply unit 2 by inserting the power plug 3 into the power outlet, the power supply unit 2 supplies operating power to the controller 1 so that the controller 1 is provided. It will work normally.

In this state, when the user presses the power key of the remote control transmitter (not shown in the figure) or the power key provided in the device, the key signal output unit 6 generates a power key signal. It operates according to an operation program stored in the main memory 4 to control the power switching unit 8 and to supply the output power of the power supply unit 2 to the load 7 through the power switching unit 8.

The controller 1 controls the load 7 according to the data stored in the auxiliary memory 5 to perform the operation just before the power is turned off.

In this state, as the user presses a predetermined function key, the controller 7 controls the load 7 to perform a predetermined operation according to the signal of the function key, and the data of the operation performed by the device is stored in the auxiliary memory. Store in (5).

In this state, when the user presses the power key again, the key signal output unit 6 generates the power key signal, the controller 1 controls the power switching unit 8 so that operating power is not supplied to the power supply unit 2. To the standby mode.

The conventional technique described above is continually operating the controller 1, which consumes a lot of power, even in the standby mode, which consumes a lot of power without need.

Accordingly, an object of the present invention is to provide a power supply control circuit that can reduce power consumption in the standby mode.

1 is a circuit diagram showing the configuration of a conventional power supply control circuit;

2 is a circuit diagram showing a configuration of a power supply control circuit of the present invention;

3 is a graph showing a drop curve of the standby power supply and the secondary power supply when the power plug is removed from the power outlet in the power control circuit of the present invention.

* Explanation of symbols for main parts of the drawings

11: first controller 12: second controller

13 power supply 14 power plug

Second Auxiliary Memory 16: Main Memory

17: first auxiliary memory 18: key signal output unit

19: load 20: power switching unit

C11: condenser

According to the power supply control circuit of the present invention for achieving this object, a first controller for controlling the overall operation of the device and consumes a lot of power, and a second controller for controlling the on and off of the power supply of the device and low power consumption; Equipped.

In the standby mode, the power supplied to the first controller is cut off, the second controller is continuously supplied with power to maintain the operating state, and the signal of the power key is input, and as the signal of the power key is input, Allow the first controller to control on and off of the power supply.

Therefore, according to the present invention, power consumption can be reduced by operating only the second controller with low power consumption in the standby mode.

Hereinafter, a power control circuit of the present invention will be described in detail with reference to the accompanying drawings.

2 is a circuit diagram showing the configuration of the power supply control circuit of the present invention.

Here, reference numeral 11 is a first controller embedded in a control device such as a video device and an audio device to control the overall operation of the device, and reference numeral 12 is a second controller for controlling the power on and off.

Reference numeral 13 is a power supply for supplying operating power to each part of the control device.

The power supply unit 13 inserts a power plug 14 into a power outlet (not shown) to output standby power as AC power is supplied, and outputs the standby power to the capacitor C11. And supplied to the second controller 12 as operating power.

Reference numeral 15 is a second auxiliary memory connected to the second controller 12 to store and output work data of the second controller 12.

Reference numerals 16 and 17 denote main memory and first auxiliary memory which are connected to the first controller 11 and store and output operation programs and work data of the first controller 11, respectively.

Reference numeral 18 is a key signal output section for outputting a signal of a function key included in the remote control transmitter or the device.

Among the key signals output from the key signal output unit 18, a signal of a power key is input to the second controller 12, and signals of other possible keys except for the power key are sent to the first controller 11. It is configured to be input.

Reference numeral 19 is a load of a control device which performs a predetermined operation according to the control of the controller 11.

Reference numeral 20 is a power switching unit for supplying and cutting off the output power of the power supply unit 13 to the first controller 11 and the load 19 as the operating power under the control of the second controller 12.

In the power control circuit of the present invention configured as described above, when AC power is supplied by inserting the power plug 14 into the power outlet 13, the power supply unit 13 outputs a standby power, and the output standby power is a capacitor ( The second controller 12 operates normally because it is charged to C11 and supplied to the second controller 12 as operating power.

In this state, when the user presses the power key and the signal of the power key is output from the key signal output unit 18, the output power signal is input to the second controller 12.

Then, the second controller 12 determines the power-on, stores data of the power-on in the second auxiliary memory 15, and controls the power switching unit 20 to control the first controller 11 and the load 19. To supply the operating power.

As described above, the first controller 11 loads according to predetermined working data stored in the first auxiliary memory 17 while the power is turned on and the operating power is supplied to the first controller 11 and the load 19. Control 19 to perform the operation just before turning off the power.

When the user presses a predetermined function key to output a signal of the function key from the key signal output unit 18, the first controller 11 controls the load 19 according to the signal of the function key, so that the user desires the predetermined function key. The operation 19 of the load 19 stores the operation data of the currently operating state in the first auxiliary memory 16.

In this state, when the user presses the power key again and the signal of the power key is input from the key signal output unit 18 to the second controller 12, the second controller 12 is turned off to the second auxiliary memory 15. In addition to storing data, the power switching unit 12 is controlled to prevent operation power from being supplied to the first controller 11 and the load 19, and to perform a standby mode operation.

On the other hand, the AC power is switched off by disconnecting the power plug 14 from the power outlet while the power is switched on and the power switching unit 20 supplies the operating power to the first controller 11 and the load 19. In this case, the power supplied from the power supply unit 13 to the first controller 11 through the power switching unit 20 drops.

Here, as shown in FIG. 3, the power supplied from the power supply unit 13 to the first controller 11 through the power switching unit 20 is dropped, and the present invention includes a capacitor C11 to provide a second power supply. The standby power supplied to the controller 12 causes a slow drop as shown in FIG.

The second controller 12 continuously checks the state of the power supplied to the first controller 11, and the power plug 14 when the power supplied to the first controller 11 drops at a time t1. Determines that the power supply is disconnected from the power outlet, and stores the data of the power-off in the second auxiliary memory 15.

By storing the power-off data in the second auxiliary memory 15 as described above, when the AC power is supplied again by inserting the power plug 14 into the power outlet, the second controller 12 is stored in the second auxiliary memory 15. Going to the power-off data will put the power-off state and operate in standby mode.

As described above, the present invention includes a first controller that consumes more power and a second controller that consumes less power, thereby allowing the first controller to control all operations except for turning on and off the power during operation of the device. In the mode, the power is cut off, and the second controller is responsible for only turning on and off the power and continuing to operate regardless of the power-on and standby modes. Only the second controller with low power consumption operates in the standby mode. This can reduce power consumption in standby mode.

Claims (4)

A first controller for controlling operations other than power control of the device, a second controller for controlling power, a second auxiliary memory for storing and outputting job data of power-on and power-off of the device according to the control of the second controller, A power supply unit for supplying standby power to the second controller and outputting operating power as AC power is supplied, and operating power output from the power supply unit under load of the first controller and the device under the control of the second controller. A main memory and a first auxiliary memory for storing and outputting an operation program and work data of the first controller, and a key signal output unit for outputting a key signal according to a user's key operation. Power control circuit. The method of claim 1, further comprising a condenser that causes the standby power supplied to the first controller to drop after the operating power supplied to the first controller drops when the AC power is cut off. Power control circuit. The method of claim 1 or 2, wherein the second controller, when the AC power supply to the power supply is cut off determines the power off by the falling of the operating power supplied to the first controller and the power off data And a second auxiliary memory. The method of claim 1, wherein a signal of a power key is input to the second controller among the key signals output from the key signal output unit, and a signal of a key other than the power key is input to the first controller. Power supply control circuit.