JP3228542B2 - Power control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply control device, and more particularly, to a power supply control device for an electronic device which is remotely controlled by a remote control means (hereinafter, referred to as a remote control).

[0002]

2. Description of the Related Art Remote control using a remote controller has been widely used in electronic devices in various fields. However, in this case, if the power supply of the operated member is completely turned off, the remote control signal itself cannot be received. A power supply system (hereinafter, referred to as a second power supply circuit) that is always supplied with power for receiving and decoding a remote control signal, and a power supply in the remote control signal. (Hereinafter referred to as a first power supply circuit). The power supply system of this type of remote controller will be described below with reference to FIGS.

FIG. 4 is a perspective view showing the appearance of a still video deck 1B and a remote control signal transmitting means (hereinafter referred to as a transmitting section) 2 between them, for example, by a wired system using a connection cable or the like, or by light or radio waves. Etc. are combined by a wireless method, but here, a wireless method using an optical signal will be described.

When the power switch 1a of the still video deck 1B is depressed, power is supplied only to a circuit system for receiving and decoding a remote control signal, and a remote control signal light for turning on the power from the transmitter 2 is transmitted to the deck 1. When light is received by the light receiving section 1b, power is also supplied to the remaining circuit systems, and a deck operation corresponding to a remote control signal is performed thereafter. It is assumed that the remote control signal light is coded according to the types of various operation buttons arranged on the upper side surface of the transmission unit 2.

FIG. 5 is a block diagram showing a power supply control system of the conventional still video deck 1B. The deck 1B receives a remote control signal light normally transmitted from the transmission unit 2 in a bit serial manner. Receiving unit 11 for converting the electric signal into an electric signal, and a CPU 1
Signal processing into a format that can be processed by 4A, for example, CP
When the processing speed of U is low, the signal conversion unit 12 converts bit serial signals into bit parallel signals, etc.
A CPU 14A that decodes the remote control signal and controls the operation sequence of each unit of the deck 1B;
A protection circuit 13A described later, a general circuit 15 for performing various deck operations, and a first power supply circuit 7 for supplying power to the general circuit 15
And an opening / closing means 6 comprising, for example, an analog switch or the like, which is turned on / off by supplying power to the first power supply circuit 7 and controlled by the CPU 14A, and a command signal comprising the receiving unit 11, the signal conversion unit 12, and the CPU 14A. Forming circuit 3
B and a second power supply circuit 8 for supplying power to the first and second power supply circuits 7 and 8.
The main part is constituted by the / DC rectifier 18 and the battery 19.

Here, the reason why the protection circuit 13A is necessary will be described. Power is supplied only to the second power supply circuit 8 of the still video deck 1A and not to the first power supply circuit 7, that is, in a standby state in which the opening / closing means 6 is turned off, Japanese Patent Application Laid-Open No. 62-73354 discloses a power supply. As described in detail in FIG. 4, the input impedance of each input port of the general circuit 15 to which the power supply voltage is not applied has a very low value. Therefore, without the protection circuit 13A, the CPU 1
4A, an overcurrent flows from each output port of the CPU 14A.
A may be destroyed.

Therefore, it is necessary to insert at least one protection resistor for each output port of the CPU 14A. In the case of the still video deck 1B, about 50 signal lines including a bus line are connected to the general circuit 15. , The protection circuit 13A requires approximately 50 chip resistors.

FIG. 6 shows a conventional deck 1B shown in FIG.
6 is a flowchart of the on / off operation of the opening / closing means 6 in FIG. When this flow starts, first, the opening / closing means 6
Is turned off (step S11), and the process stands by until a command signal for turning on the power of the remote control signal light emitted from the remote control transmission unit 2 is received (step S12).
Upon receiving the command signal for turning on the power, the opening / closing means 6
Is turned on (step S13), and power is supplied to the general circuit 15 via the first power supply circuit 7 to perform a normal operation (step S1).
4). This normal operation is continued until a command signal for turning off the power is transmitted from the remote control transmission unit 2 (steps S14 and S15). Then, the process returns to step S11 to repeat the above operation.

[0009]

By the way, the power supply control device for electronic equipment remotely controlled by the above-mentioned conventional remote control means decodes various remote control signal lights and turns on / off the power supply.
Since the opening / closing means 6 is turned on / off in response to the command signal for turning off, the power of the CPU 14A needs to be taken from the second power supply circuit 8, which is always supplied with power. However, since the CPU 14A consumes much more current than the other members constituting the command signal forming circuit 3A, that is, the receiving unit 11 and the signal converting unit 12, the CPU 14A uses the battery 1 as a required power source.
This is particularly problematic when power is supplied from only 9.

[0010]

[0011] Accordingly, the present onset Akira is to solve the above problems,
It suppresses the current consumption in the standby state when the remote operation
It is an object of the present invention to provide a power supply control device capable of performing the following .

[0012]

A power supply control device according to the present invention supplies a predetermined power supply via opening / closing means.
Power supply means that is constantly energized and
And decodes only the information related to power-on
Control the opening / closing means, and other information
A first decoding means for outputting without code, the power supply
Receiving power from the first decoding means.
Decode the output information of the
Decoding which controls the opening / closing means in response to the information
Means, wherein the opening / closing means is a first decoding means.
Are turned on by the power-on signal, and the second decoding
Characterized by being turned off by a power-off signal from the stage.
You .

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a still video deck will be described below. FIG. 1 is a block diagram of a still video deck 1 in which a power supply control device according to a first embodiment of the present invention is incorporated. The first embodiment differs greatly from the conventional example shown in FIG. Only the means for decoding the command signal related to turning on the power from the transmission unit 2 is configured as a dedicated small-scale limited data discriminating unit, and a CPU for decoding various remote control signals excluding the command signal related to turning on the power is provided. That is, power is supplied from the first power supply circuit that is supplied with power via the opening / closing means. Except for this point, there is no difference from the above-described conventional example. Therefore, the same components are denoted by the same reference numerals, and the description thereof will be omitted. Only different components will be described below.

In FIG. 1, a first input / output terminal group consisting of a relatively small number of conductors for receiving a command signal for turning on / off the power supply is formed by a connection portion 4 connecting the protection circuit 13 and the CPU 14. Have been. Further, a second input / output terminal group composed of a relatively large number of conductors other than the first input / output terminal group is formed by the connection portion 5 that connects the CPU 14 and the general circuit 15. Then, a first load circuit having the first input / output terminal group 4 and the second input / output terminal group 5 at the input / output end is formed by the CPU 14 and connected to the second input / output terminal group 5. The second load circuit is formed by the general circuit 15. Although the first load circuit is shown by the CPU 14, it is needless to say that the present invention is not limited to this and may be configured by a combination of logic circuits.

A command signal is formed in response to power-on / off information from a transmitting unit 2 as a predetermined remote control means, and the command signal is transmitted to the first input / output terminal group 4 of the first load circuit. And a command signal forming circuit 3 for controlling the opening / closing of the opening / closing means 6 includes a receiving unit 11 and a signal converting unit 12
And a limited data discriminator 16 for discriminating only the power-on signal in the remote control signal. When the command signal for turning on the power is detected by the limited data determination unit 16 of the command signal forming circuit 3, the output turns on the opening / closing means 6 formed by an analog switch or the like via the OR gate 17. . On the other hand, the opening / closing means 6 is turned off by applying a command signal for turning off the power, decoded by the CPU 14 as the first load circuit, through the OR gate 17. That is, the opening / closing means 6 is a vice table.

The on / off operation of the opening / closing means 6 in the first embodiment having the above-described structure will be described with reference to the flowchart of FIG. When this flow starts, first, a remote control signal is received (step S1), and if a remote control signal is received, it is confirmed as a power-on signal (hereinafter referred to as limited data) (step S1).
2) Wait for each.

When the power-on limited data is detected by the limited data discriminating section 16 (see FIG. 1), an active H signal is output from the limited data discriminating section 16 to turn on the opening / closing means 6 via the OR gate 17 (see FIG. 1). Step S3). Therefore,
Power is supplied to the first power supply circuit 7 from predetermined power supplies 18 and 19, whereby the CPU 14 serving as the first and second load circuits is supplied.
And the general circuit 15 operates. As described above, the opening / closing means 6 continues to be turned on even when the power-on limited data is exhausted until the power-off limited data described later is transmitted from the CPU 14.

While the first and second load circuits are operating and the deck 1 is energized, a predetermined deck operation is performed. During this period, a remote control signal is constantly received ( Step S4). That is, when the remote control signal is received, if it is not the power-off limited data (step S5), the remote control signal is transmitted to the CPU 14 (step S7). On the other hand, if the remote control signal received in steps S4 and S5 is the power-off limited data,
After turning off the opening / closing means 6 via the OR gate 17 (step S6), the CPU 14 returns to the step S1 to repeat the above flow.

According to the first embodiment, the power is supplied from the second power supply circuit 8 which is always energized without passing through the opening / closing means 6 because the receiving unit 11 constituting the command signal forming circuit 3 , The signal conversion unit 12, the limited data determination unit 16, and the OR gate 17, and the CPU 14 is not included. The limited data discriminating section 16 can be configured simply because it can detect only the command signal related to turning on the power among various remote control signals. Therefore, the current consumption is
, The current consumption in the standby state can be suppressed.

Further, in the first embodiment, the CPU 14 for decoding the remote control signal is supplied with power from the first power supply circuit 7 via the opening / closing means 6 like the general circuit 15. Therefore, the second input / output terminal group 5 composed of a relatively large number of conductors for connecting the CPU 14 and the general circuit 15 does not require any protection circuit. The need for a protection circuit
If the first input / output terminal group 4 made up of a relatively small number of conductors on the input side of the CPU 14 is to be used, for example, to transmit a remote control signal from the signal
This is converted to bit parallel by the signal conversion unit 12 and the CPU
Even in the case of transmission to 14, the number of parallel bits and the number of common lines plus about 6 to 7 are sufficient. That is, the required number of protection resistors of the protection circuit 13 is much smaller than that of the conventional example, so that the required chip area can be reduced.

FIG. 3 is a block diagram showing a still video deck in which a power supply control device according to a second embodiment of the present invention is incorporated. The conversion unit 12 and the limited data determination unit 16 are combined into a signal conversion unit / limited data determination unit 21, and the determination unit 21 decodes a command signal related to turning on / off the power. Since there is no difference from the first embodiment except for the above, the same components are denoted by the same reference numerals, and description thereof will be omitted. The command signal forming circuit 3A is formed by the receiving unit 11 and the signal conversion unit / limited data determination unit 21 and the signal conversion unit / limited data determination unit 21
Is constituted by a so-called one-chip microcomputer.

Also in the second embodiment, the CPU 14 as the first load circuit is supplied with power from the first power supply circuit 7 via the opening / closing means 6, and the command signal forming circuit 3A turns on the power supply in the remote control signal. The operation is the same as that of the first embodiment because only the command signal for turning off is detected.
The effect, that is, the current consumption can be reduced, and the size of the protection circuit can be reduced.

In each of the above embodiments, the present invention in which only the means for decoding the command signal for turning on / off the power transmitted from the remote control transmitter 2 is constituted by a dedicated small-scale circuit is applied to a still video deck. Although described in the example, the present invention is not limited to this, and it is needless to say that the present invention can be widely applied to electronic devices remotely controlled by remote control means.

[0024]

As described above, according to the present invention, opening and closing
And power supply means for supplying a predetermined power supply through the means constantly communicates
Power and receive information from the specified remote control
Controls the opening / closing means by decoding only information related to ON
And output other information without decoding
Receiving the power from the first decoding means and the power supply means
In both cases, the output information from the first decoding means is decoded.
Receiving the information related to the power-off of the information, and opening the
And second decoding means for controlling the closing means.
The closing means responds to a power-on signal from the first decoding means.
Power on signal from the second decoding means.
As a result, the power consumption in the standby state at the time of remote operation can be suppressed.

[Brief description of the drawings]

FIG. 1 is a block diagram of a still video deck to which a power control device according to a first embodiment of the present invention is applied.

FIG. 2 is a flowchart of an on / off operation of an opening / closing means in the first embodiment.

FIG. 3 is a block diagram of a still video deck to which a power supply control device according to a second embodiment of the present invention is applied.

FIG. 4 is an external perspective view of a still video deck and remote control means.

FIG. 5 is a block diagram of a still video deck to which a conventional power supply control device is applied.

FIG. 6 is a flowchart of the on / off operation of the opening / closing means in FIG. 5;

[Explanation of symbols]

 2... Transmitting section (remote control means) 3, 3A... Command signal forming circuit 4... First input / output terminal group 5. Opening / closing means 7 First power supply circuit 8 Second power supply circuit 14, 14A CPU (first load circuit) 15 General circuit (second circuit) Load circuit) 18 AC / DC rectifier (predetermined power supply) 19 ...... Battery (predetermined power supply)

Claims (1)

(57) [Claims] 1. A predetermined power source is supplied via an opening / closing means.
The power supply means is always energized and receives information from predetermined remote control means.
And decodes only the information related to power-on to
And other information is output without decoding.
A first decoding means for force, the supplied with power of the power supply means, said first decode
Decoding the output information from the loading means, and
A second method for controlling the opening / closing means in response to the information relating to the off state
Decoding means , wherein the opening / closing means is provided with a power supply from the first decoding means.
Is turned on by the power-on signal, and from the second decoding means.
A power supply control device, which is turned off by a power supply off signal of the power supply.