JPS628665A - Electric device - Google Patents

Abstract

PURPOSE:To operate easily a main body only by turning on a main electric power source switch by providing a switch detecting circuit to detect the switching of a main electric power source switch and a switching control means to switch a sub-electric power source switch in accordance with a detecting output. CONSTITUTION:While a main electric power source switch 2 is released, the electric current flows at a photodiode circuit 8, a photodiode 9 emits the light, the electric current flows at a phototransistor circuit 13 and a terminal 21 of a microcomputer 18 comes to be an H level. When the main electric power source switch 2 is turned on, the electric power source is supplied through a remote control receiver 17 to a terminal 19 of the microcomputer 18. Only while the time limit is determined by the CR time constant of a capacitor 10 and a resistance 11, the photodiode 9 continues to emit the light and during this, the microcomputer 18 is reset. By the quenching of the photodiode 9, the phototransistor circuit 13 is turned off, the terminal 21 is changed to an L level, the level change is detected by the microcomputer 18, a sub-electric power source switch 5 is closed by the output of a terminal 22 and a main body 6 is energized.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a microcomputer that has a main power switch and a sub power switch, is energized by the closing of the main power switch, and controls opening and closing of the sub power switch. The present invention relates to an electrical device such as a television receiver, etc., which is energized by closing both the main power switch and the sub power switch.

[Prior Art] Fig. 1 is a schematic configuration diagram showing a television receiver controlled by a conventional remote controller, and in the figure (1)
is a power supply, (2) is a main power switch, (3) is a remote controller (hereinafter referred to as a remote controller), and (4) is a control that receives operation signals from this remote controller (3) and generates control signals accordingly. The sub-main body is a circuit, (5) is a sub-power switch that is controlled to open and close by the control signal from the sub-main body (4), (6) is the main power switch (2), and the sub-power switch (5).
The television receiver body is energized by the closing of both.

In the above configuration, the main body, that is, the television receiver (
6), first turn on the main power switch (2).
and energizes the sub-body, that is, the control circuit (4),
The remote control (3) is operated and an operation signal is sent to the control circuit (4), and the control circuit (4) receives this operation signal and inputs it to a built-in microcomputer (hereinafter referred to as microcomputer), which then controls the output of the microcomputer to switch on the sub power switch. (5) is closed. The main body (6) operates only when the sub-power switch (5) is closed.

[Problems to be Solved by the Invention] Since the conventional electric device having a main/sub power switch is configured as described above, in order to operate the main body, the main power switch (2) must be turned on, and then Sub power switch (
5) must be closed, which is a complicated operation. In addition, in order to improve the operability of the main body, it is possible to keep the main power supply closed at all times, but in this case, the sub-main body (4) is always energized, resulting in unnecessary consumption of power, and when you are away, etc. There were problems such as the risk of an accident occurring.

The present invention has been made to solve the above problems, and an object of the present invention is to provide an electric device in which a sub-power switch is automatically closed when the main power switch is turned on.

[Means for Solving the Problems] An electrical device according to the present invention is provided with an open/close detection circuit for detecting opening/closing of a main power switch, and an opening/closing control means for opening/closing a sub power switch in accordance with the detection output of this circuit. It is something that

[Operation] In this invention, when the main power switch is closed, the opening/closing detection circuit detects this, and the opening/closing control means operates according to the detection output to open/close the sub power switch. However, even if there is a momentary power outage and the main power switch is closed and the sub power switch is opened and the power is restored, the open/close detection circuit will not detect this because there is no open/close change force in the main power switch, and the main power switch will not be turned on. Distinguished from time.

[Example code] An embodiment of the present invention will be described below with reference to the drawings.

Fig. 1 is a circuit diagram showing an embodiment of the present invention, in which (1) to (6) show the same or equivalent parts as the conventional example shown in Fig. 2, and (7) shows the main part. This is an open/close detection circuit connected in parallel to the power switch (2), and the photodiode circuit (
8), a photodiode (9), a time capacitor (10), a resistor (11), a diode (12), and a phototransistor (14), a resistor (15), and (16) a phototransistor circuit (13). The power is 1. (17) is a remote controller receiver (hereinafter referred to as a remote control receiver) which is energized when the main power switch (2) is turned on and receives operation signals from the remote controller (3); (18) is a remote controller receiver (hereinafter referred to as a remote control receiver); 17) to the terminal (
19), a power supply voltage is applied to the terminal (20), an operation signal is applied to the terminal (20), a main power switch open/close signal is applied from the open/close detection circuit (7) to the terminal (21), and an open/close control signal is applied from the terminal (22) to the sub power switch (5). ) (hereinafter referred to as microcomputer). Note that (23) and (24) are resistances.

Next, its operation will be explained. When the main power switch (2) is open, current flows through the photodiode circuit (8) and the photodiode (9) emits light, and the capacitor (10) becomes charged, and the light emission from the photodiode (9) causes the phototransistor to Current flows through the circuit (13), and the input terminal (21) of the microcomputer (18) is at H level. When the main power switch (2) is turned on in this state, power is supplied to the remote control receiver (17) and through it to the terminal (19) of the microcomputer (18). On the other hand, when the switch (2) is closed, the photodiode circuit (8)
However, the photodiode (9) continues to emit light for a period of time determined by the CR time constant of the capacitor (10) and resistor (11). During this time, the microcomputer (1
8) is reset by supplying power to it and is in a standby state. Due to the extinction of the photodiode (9),
The phototransistor circuit (13) is also turned off and the terminal (2
1) changes from H level to L level. The microcomputer (18) detects this level change and outputs a signal for closing the sub power switch (5) to the terminal (22).
) is closed and the main body (6) is energized. In this way, the auxiliary power switch (5) is automatically turned on without operating the remote control (3) to send out the operation signal for closing the auxiliary power switch.

Also, while the main power switch (2) is closed, the remote control (3)
If an operation signal is input to the microcomputer (18) by operating the , the sub power switch (5) can be opened. Since the opening/closing operation of the main open/close switch (2) is not accompanied by the opening/closing operation, the open/close detection circuit (7) does not detect any signal and no level change occurs at the terminal (21) of the microcomputer (18). ) is never injected. That is, the sub power switch (5) is automatically closed only when the main power switch (2) is turned on, but is controlled by the remote control (3) after the main power switch (2) is turned on.

In the above embodiment, an example was shown in which the television receiver body was used as the main body and the control circuit was used as the sub body.
The present invention can also be applied to electrical devices having other main/sub power switches.

[Effects of the Invention] As described above, the present invention detects the opening and closing of the main power switch and opens and closes the sub power switch accordingly, so the main body can be easily operated by simply turning on the main power switch when the power is turned on. This has the effect of providing a power supply device having dual main and sub power switches that can be easily operated.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram showing an embodiment of the present invention, and FIG. 2 is a schematic configuration diagram showing a conventional television receiver. In the figure, (2) is the main power switch, and (4) is the sub-main unit. (5) is a sub power switch, (6) is a main body, (7) is an opening/closing detection circuit, and (18) is a controller (opening/closing control means). The same reference numerals in the drawings indicate the same or corresponding parts.

Claims (3)

[Claims] (1) A sub main body having a main power switch and a sub power switch, including a controller that is energized by the closing of the main power switch and controls opening and closing of the sub power switch, and the main power switch and the sub power switch. In an electrical device consisting of a main body that is energized by both closing, the sub body has an open/close detection circuit that detects the opening and closing of the main power switch, and an open/close detection circuit that detects whether the main power switch is opened or closed according to the detection output of this circuit. An electrical device characterized by being provided with opening/closing control means. (2) The main body is a television receiver body, and the sub-body includes a controller such as a microcomputer that receives a control signal from a remote controller and controls opening and closing of the sub-power switch in accordance with this signal. 2. The electrical device according to claim 1, wherein the electrical device is a control circuit, and the opening/closing control means is a means executed by the controller. (3) the opening/closing detection circuit is connected in parallel to the main power switch, and emits light when the main power switch is opened;
The invention comprises a photodiode circuit that extinguishes light after a predetermined time period when the photodiode is closed, and a phototransistor circuit that generates a signal for closing the auxiliary power switch by extinguishing the photodiode and applies it to the opening/closing control means. 2. The electrical device according to item 1 or 2.