JP2001103745A - Power supply unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide power supply unit capable of being started by means of remote control by setting electric power consumption to zero during standby. SOLUTION: When load is in standby, a switching element 8 is in an open condition. When an ON command for setting the load to an ordinary service condition from a standby condition is outputted from a remote control 11, a reception processing part 13 receives the ON command through a remote control receiving part 12 and gets operating power supply from a solar battery 14 to drive a drive circuit 10, set the switching element 8 in a closed condition, and give AC power supply 1 to a switching regulator 9. It is thus possible to maintain power consumption at zero during standby.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply for reducing the standby power consumption of a load to zero.

[0002]

2. Description of the Related Art In recent years, from the viewpoint of energy saving, it has been attempted to reduce the standby power consumption of electric appliances as loads such as televisions and copiers. For example, in a television, a state where the power is turned off by the remote control device is a standby state, and when the copier is not used, the state is a standby state. In order to reduce such power consumption during standby, for example, a switching regulator that operates intermittently during standby is used.

FIG. 4 is a circuit diagram of a switching regulator that converts an alternating current into a direct current and supplies a DC power. An alternating current from a commercial frequency AC power supply 1 is rectified by a rectifier 2 and supplied to a transformer 3 to which an electric product as a load is connected. In the normal use state, the transformer 3
Is converted by controlling the output switching element 5 at a predetermined frequency from the switching control circuit 4.

On the other hand, during standby, the switching control circuit 4
Controls the output switching element 5 based on the intermittent transmission signal from the intermittent transmission circuit 6 and converts the DC current supplied to the transformer 3. That is, the alternating current of the AC power supply 1 is full-wave rectified by the diodes D1 and D2 and the rectifier circuit 2, and the switching element 7 is turned on when the voltage divided by the resistors R1 and R2 exceeds the Zener voltage of the Zener diode ZD. Thus, an intermittent transmission signal is generated at the timing of the commercial frequency. Switching element 7
The ON / OFF or OFF period is converted by the Zener voltage.

As described above, by inputting the intermittent transmission signal, which is an external signal, from the intermittent transmission circuit 6 to the switching control circuit 4, the switching control circuit 4 is turned on / off at the timing (commercial frequency) of the intermittent transmission circuit 6. The power consumption (standby power) at the time of light load is suppressed by performing the intermittent transmission operation of the switching control circuit 4.

[0006]

However, such a conventional switching regulator consumes power even during standby.

[0007] It is an object of the present invention to provide a power supply device which can reduce the power consumption during standby to zero and can be started by a remote controller.

[0008]

According to a first aspect of the present invention, there is provided a power supply device comprising:
A switching regulator for controlling a direct current obtained by rectifying a commercial frequency AC power supply and converting power supplied to a load; and a switching regulator provided between the AC power supply and the switching regulator when the load is in a standby state. A switch element that is open and closed when the load is in a normal use state; a drive circuit that opens and closes the switch element; and an ON command or the like that causes the load to change from a standby state to a normal use state A remote controller for outputting an off command for inverting the remote controller; a remote controller receiving unit for receiving a command from the remote controller; A reception processing unit for outputting to a circuit; and an operating power supply for the reception processing unit and the drive circuit when the load is in a standby state. Characterized by comprising a; and the solar cell supplies.

The switching regulator controls a direct current obtained by rectifying a commercial frequency AC power supply and converts power supplied to a load. The load is, for example, an electric product such as a television, a video, an air conditioner, and a copy machine.
The switch element is an element that is electrically turned on and off, and for example, a contact of a relay or a transistor is used. The drive circuit opens and closes the switch element, and issues a drive control signal therefor. When the load is set to the standby state, a drive control signal for opening the switch element is issued, and when the load is set to the normal use state, a drive control signal for closing the switch element is output.

The remote controller outputs an ON command for changing the load from a standby state to a normal use state or an OFF command for reversing the load. For example, the remote controller has an infrared light emitting diode, and outputs an ON / OFF command by blinking the LED. I do. The on / off command from the remote controller is received by the remote controller receiver.

The reception judging unit is constituted by, for example, a microcomputer, and judges a command from the remote controller received by the remote control receiving unit. When the command is an ON command, a command to close the switch element is output to the drive circuit, and when the command is an OFF command, an command to open the switch element is output to the drive circuit. Further, the solar cell supplies operation power to the reception processing unit and the drive circuit when the load is in a standby state.

According to the first aspect of the invention, when the load is in the standby state, the power consumption can be reduced to zero.

According to a second aspect of the present invention, in the first aspect of the present invention, the remote controller has a light source for supplying light to the solar cell when outputting the ON command.

The remote controller has a light source, and supplies light from the light source to the solar cell to more reliably secure the operation power supply of the reception processing unit and the drive circuit when the load is on standby. As the light source, for example, a lamp is used.

[0015]

Embodiments of the present invention will be described below. FIG. 1 is a configuration diagram of a power supply device according to an embodiment of the present invention.

In FIG. 1, alternating current from a commercial frequency AC power supply 1 is input to a switching regulator 9 via a switch element 8. The switching regulator 9 rectifies the input AC and controls the obtained DC to convert the power supplied to the load. The switch element 8 is controlled by the drive circuit 10 to be in an open state when the load is in a standby state, and is controlled to be in a closed state when the load is in a normal use state.

The remote controller 11 outputs a command for changing the load from the standby state to the normal use state or vice versa. When the load is changed from the standby state to the normal use state, it outputs an ON command. In the opposite case, an off command is output. A command from the remote control 11 is input to the reception processing unit 13 via the remote control reception unit 12.

The reception processing unit 13 includes a remote control reception unit 12
And outputs a close command to close the switch element 8 to the switch element 8 when the command is ON, and an open command to open the switch element 8 when the command is OFF. Is output to the switch element 8. In this case, the solar cell 14 supplies operation power to the reception processing unit 13 and the drive circuit 10. That is, when in the standby state, the reception processing unit 13 and the drive circuit 10 input operating power from the solar cell 14 via the diode D11, and when the load is in the normal use state, the switching regulator 9 From diode D1
The operation power supply is input through the terminal 2.

Here, the remote controller 11 has a light source, for example, a lamp. When outputting an ON command, the remote controller 11 turns on the light source to supply light to the solar cell 14. If the amount of power generated by the solar cell 14 is sufficiently large due to the surrounding brightness, the light source is not necessarily required.

Thus, when the load is in the standby state, since the switching element 8 is open, the alternating current from the AC power supply 1 is not input to the switching regulator 9, so that the power consumption in the standby state becomes zero.

Assume that the load is in a standby state. In this case, since the switch element 8 is turned off, the power consumption is zero. To start the power supply for this load,
The remote controller 11 outputs an ON command, turns on the light source, and shines light on the solar cell 14. The ON command is transmitted to the remote control light receiving unit 12 by an infrared signal.

By operating the remote controller 11, energy from the solar cell 14 is supplied to the reception processing unit 13 and the drive circuit 10. Then, when the command from the remote controller 11 is determined by the reception processing unit 13 and it is determined that the command is a normal ON command, the switch element 8 is closed and AC is supplied from the AC power supply 1 to the switching regulator 9. When the switching regulator 9 operates, energy is supplied from the switching regulator 9 to the reception processing unit 13, so that energy from the solar cell 14 is not required.

On the other hand, in order to shift the load from the normal use state to the standby state, the remote controller 11 transmits an OFF command by infrared rays. As a result, the reception processing unit 13 receives the OFF command, the switch element 8 opens, and the AC power supply from the AC power supply 1 to the switching regulator 9 stops, and the standby power becomes zero.

FIG. 2 is a perspective view when the power supply device according to the embodiment is applied to a television 15 which is an electric product. The remote controller 11 is provided with an infrared light emitting diode 16 and a light source 17.
Outputs an on / off command with infrared rays, and the light source 17 outputs light.

On the other hand, the television 15 is provided with a remote control receiving section 12 for receiving an on / off signal of infrared rays from an infrared light emitting diode 16 and a solar cell 14 for receiving light from a light source 17.

FIG. 3 is a circuit diagram of the power supply device according to the embodiment. The alternating current input from the AC power supply 1 via the switch element 8 is input to the filter circuit 18 of the switching regulator 9 and further input to the rectifying / smoothing circuit 19. The DC rectified by the rectifying and smoothing circuit 19 is converted by a switching control circuit 20 and supplied to a transformer 21 to which a load is connected. Power is supplied to the load via the diode D13.

A circuit for supplying operating power to the drive circuit 10 is formed in the transformer 21, and the operating power is supplied to the drive circuit 10 via a diode D12. The drive circuit 10 is supplied with operating power from a solar cell 14 via a diode D11. The drive circuit 10 is driven by a signal from the reception processing unit 13 to close the switch element 8.

As described above, when the load is in the standby state, the switching element 8 is open, and the alternating current from the AC power supply 1 is not input to the switching regulator 9.
Therefore, the power consumption during standby is zero. On the other hand, when the switch element 8 is closed in the standby state, the reception processing unit 13 and the drive circuit 10 operate with the operation power from the solar cell 14, and once the switch element 8 is closed, the drive circuit 1 is closed.
Operation power is supplied to 0 from the switching regulator.

[0029]

As described above, according to the first aspect of the invention, the remote control operation including the power-on operation can be performed while the standby power is reduced to zero.
Energy for the solar cell can be more reliably secured.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a power supply device according to an embodiment of the present invention.

FIG. 2 is an exemplary perspective view in which the power supply device according to the embodiment of the present invention is applied to a television;

FIG. 3 is a circuit diagram of a power supply device according to the embodiment of the present invention.

FIG. 4 is a configuration diagram of a conventional switching regulator.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 AC power supply 2 Rectifier 3 Transformer 4 Switching control circuit 5 Output switching element 6 Intermittent transmission circuit 7 Switching element 8 Switch 9
Switching regulator 10 Drive circuit 11
Remote controller 12 Remote control receiver 13 Reception processor
Reference Signs List 14 solar cell 15 television 16 infrared light emitting diode 17 light source 18 filter circuit 19 smoothing rectifier circuit 20 switching control circuit 21 transformer

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2C061 AP04 HH11 HT02 HT08 HT11 2H027 EJ15 EJ18 ZA01 5H420 BB12 CC03 CC04 CC09 CC10 DD02 DD05 EA11 EB04 EB34 EB40 FF03 FF25 5H730 AA14 BB43 CC01 DD02 EE02 FD02

Claims (2)

[Claims] 1. A switching regulator for controlling a direct current obtained by rectifying a commercial frequency AC power supply and converting power to be supplied to a load; and wherein the load is provided between the AC power supply and the switching regulator and the load is in a standby state. A switch element that is open when in the state and closed when the load is in a normal use state; a drive circuit that opens and closes the switch element; and changes the load from a standby state to a normal use state. A remote controller that outputs an ON command to turn on or a reverse command to reverse the command; a remote control receiving unit that receives a command from the remote controller; A reception processing unit that outputs an opening / closing command to the drive circuit; and the reception processing unit and the drive circuit when the load is in a standby state. And a solar cell for supplying operating power to the road. 2. The power supply device according to claim 1, wherein the remote controller has a light source that supplies light to the solar cell when outputting the ON command.