JPH07262761A - Electronic equipment - Google Patents

Abstract

PURPOSE:To control plural equipments by relating them to each other without newly providing a communication channel. CONSTITUTION:A tuner 14 is connected to a terminal (a) of a signal switch 15 in a TV 11. An output terminal 3 of a VTR 1 is connected to the terminal (b) through an input terminal 12. The output terminal 7 of the VTR 5 is connected to the terminal (c) through the input terminal 13. The switch 15 is switched successively by a control signal SC from a microcomputer 17. Whether or not a video signal is supplied from the switch 15 is detected by a video signal detection part 16. A detection signal SD is supplied to the microcomputer 17. The video signal VP1 is supplied from the VTR 1. When the switch 15 is selected to the terminal (b), the signal VP 1 is supplied to the detection part 16. The microcomputer 17 recognizes that the video signal is supplied by the signal SD from the detection part 16, and turns on a power source switch. When the supply of the signal VP 1 from the VTR 1 is stopped, the microcomputer 17 recognizes that no video signal is supplied by the signal SD from the detection part 16, and turns off the power source switch.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic device suitable for application to, for example, a television.

[0002]

2. Description of the Related Art Conventionally, when a plurality of electronic devices are connected and used, for example, when a video tape recorder or the like is connected to a television, the operation switch of each device or the corresponding device is used. It is common practice to operate remote control devices individually. There is also known a remote control device having a learning function that stores transmission codes of different remote control devices and can output transmission codes of different remote control devices according to an operation.

[0003]

As described above, when a plurality of electronic devices are connected and used, the operation is very complicated because the operation switches are operated individually. Also,
Even when using a remote control device with a learning function,
It is necessary to store the transmission code of the remote control device corresponding to each device, and to operate each device, it is necessary to repeatedly operate the operation key of the remote control device corresponding to the operation switch of the device, which is easy. It wasn't.

Further, when a plurality of devices are to be associated and controlled in order to reduce the operation of the operation switches and the remote control device, it is necessary to provide a communication path between the devices to perform communication by a unified communication method. Cannot be carried out.

Therefore, the present invention provides an electronic device which can control a plurality of devices in association with each other without newly providing a communication path.

[0006]

According to another aspect of the present invention, there is provided an electronic device, wherein a signal switching means for selectively switching and outputting signals of a plurality of systems and whether the signal is output to the output side of the signal switching means. Signal detecting means for detecting whether or not the signal is output, the signal processing means for processing the signal output to the output side of the signal switching means, and the operation of the signal switching means and the operation of the signal processing means based on the detection output of the signal detecting means. And a control means for controlling, wherein the signal detection means detects that the signal is being output to the output side of the signal switching means in a state in which signals of a plurality of systems are sequentially and repeatedly selected by the switching operation of the signal switching means. At this time, the control means stops the switching operation of the signal switching means and puts the signal processing means into the operating state.

In the electronic device according to the second aspect of the present invention, when the signal detecting means detects that the signal is no longer output to the output side of the signal switching means, the control means releases the operating state of the signal processing means. It is a thing.

[0008]

According to the present invention, when a signal of a certain system is supplied to the signal switching means, the signal is output to the output side of the signal switching means and is detected by the signal detecting means when the system is selected. In this case, the switching operation of the signal switching means is stopped by the control means, the selected state of the system is maintained, and the operation of the signal processing means is started to perform the signal processing. Further, when the signal is stopped and the signal is not detected by the signal detecting means, the operation of the signal processing means is stopped by the control means. Therefore, it is possible to automatically control the operation without operating the operation switch in relation to the supply of the signal of the device connected to the outside.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an electronic device according to the present invention will be described below with reference to FIG. In this embodiment, two video tape recorders and one television are connected and the television is controlled in relation to the operation of the video tape recorder.

In FIG. 1, reference numeral 1 denotes a video tape recorder, and a reproduction signal processing unit 2 of the video tape recorder 1 is supplied with a reproduction signal of a magnetic tape read by a reproduction head (not shown). This reproduction signal is converted into a video signal VP1 by the reproduction signal processing unit 2 and output from the video output terminal 3. Similarly, the reproduction signal processing unit 6 of the video tape recorder 5 is supplied with the reproduction signal of the magnetic tape, converted into the video signal VP2 by the reproduction signal processing unit 6, and output from the video output terminal 7.

Reference numeral 11 is a television. The television 11 has two video input terminals 12 and 13.
The video input terminals 12 and 13 are connected to the video output terminal 3 of the video tape recorder 1 and the video output terminal 7 of the video tape recorder 5, respectively.

The two video input terminals 12 and 13 of the television 11 are connected to the terminals b and c of the signal switcher 15, respectively. Further, the tuner section 14 is connected to the terminal a of the signal switcher 15 to supply the video signal VT obtained by processing the television reception signal.

In the signal switching device 15, the tuner unit 14
Video signal VT supplied from the video tape recorder 1 and the video signal V supplied from the video tape recorder 1 to the video input terminal 12
Video input terminal 13 from P1 and video tape recorder 5
One of the video signals VP2 supplied to the above is selected. The switching control of the signal switch 15 is performed by a microcomputer (hereinafter referred to as “microcomputer”) 1 described later.
Controlled by 7.

The video signal selected by the signal switch 15 is supplied to the image processing section 18 and the video signal detecting section 16. The video signal supplied to the image processing unit 18 is displayed on a television screen (not shown) after the synchronizing signal is separated and color signal processing is performed in the image processing unit 18.

The video signal detector 16 determines whether or not a video signal is output to the output side of the signal switcher 15, and the determination signal SD is supplied to the microcomputer 17.

The microcomputer 17 controls the power supply of the image processing unit 18, the deflection processing unit and the audio signal processing unit (not shown), selects the television reception signal and switches the input (for example, from the TV mode to the external video mode). Switch to)
Is to do.

Although not shown, the signal switching unit 15, the video signal detecting unit 16 and the microcomputer 17 are connected to the image processing unit 1.
The power is supplied from a power supply system different from the power supply system 8, the deflection processing unit (not shown), the audio signal processing unit (not shown), and the like. Therefore, power is supplied to the image processing unit 18, the deflection processing unit, the audio signal processing unit, and the like only when the power switch is turned on, and the signal switching unit 15, the video signal detection unit 16, and the microcomputer 17 are supplied with power. Power is supplied not only when the switch is on but also when the power switch is off (so-called standby state).

In this example, the video tape recorder 1
Alternatively, when the video tape recorder 5 is operated for reproduction and the video signals VP1 and VP2 are supplied to the video input terminals 12 and 13 of the television 11, the power switch of the television 11 is turned on and input. The image of the video signal is displayed on the screen.

Hereinafter, using the flowchart of FIG. 2,
The control operation of the television 11 will be described.

When the power supply to the television 11 is started to enter the standby state, the signal switching unit 15 is set to the b side by the control signal SC from the microcomputer 17 in step ST1, and the process proceeds to step ST2.

In step ST2, it is determined whether or not there is a video signal on the output side of the signal switcher 15. In this case, since the signal switch 15 is selected on the side b, the video signal detector 16 determines whether or not a video signal is supplied to the video input terminal 12. Here, the video tape recorder 1 is operated for reproduction, and the video signal V
When P1 is selected by the signal switcher 15, the video signal detector 16 determines that the video signal is supplied, and the process proceeds to step ST5. Further, when the video tape recorder 1 is not operated for reproduction, the video signal VP1 is not supplied to the video signal detector 16, so that the process proceeds to step ST3.

In step ST3, the signal switch 15 is switched from the b side to the c side by the control signal SC from the microcomputer 17, and the process proceeds to step ST4.

Similar to step ST2, step ST4
Then, in step ST3, since the signal switcher 15 is selected on the c side, the video signal detection unit 16 determines whether or not a video signal is supplied to the video input terminal 13. Here, when the video tape recorder 5 is reproduced and the video signal VP2 is selected by the signal switcher 15,
The video signal detector 16 determines that the video signal is supplied, and the process proceeds to step ST5. If the video tape recorder 2 is not being played back, the video signal is not supplied to the video signal detector 16, and therefore the process returns to step ST1.

In this way, by sequentially switching the signal switch 15, the video signal is supplied from the video tape recorder 1 and the video tape recorder 5 connected to the video input terminal 12 and the video input terminal 13, respectively. Monitored by 16.

In step ST5, the microcomputer 17 turns on the power switch of the television 12. At this time, the image of the video signal selected by the signal switch 15 is displayed on the screen, and the process proceeds to step ST6.
For example, in step ST2, the video tape recorder 1 is operated for reproduction, and the video signal VP1 is changed to the video signal detection unit 1.
6 is detected, the step ST is detected.
At 5, the power switch of the television 11 is turned on by the microcomputer 17, and the image from the video tape recorder 1 is displayed on the screen of the television 11.

At step ST6, the video signal detector 1
It is determined whether the video signal continues to be supplied to 6. If the video signal is still supplied,
The process returns to step ST6 and the determination is made again. When the video signal is no longer supplied to the video signal detection unit 16, the process proceeds to step ST7, and the television 11 sets the microcomputer 17
Turns the power switch off.

That is, while the video tape recorder 1 or the video tape recorder 5 is reproducing, the television 11
Is not turned off, and when the video tape recorder 1 or the video tape recorder 5 is stopped and the video signal is no longer supplied, the power switch of the television 11 is turned off. In addition, the television 11
If the power supply is not stopped, the process may proceed from step ST7 to step ST1 again to continue the control operation.

It is needless to say that the television reception signal from the tuner section 14 can be displayed on the screen by setting the signal switch 15 to the side a by operating the switch of the television 11 without mentioning the above.

Thus, according to this example, the television 1
The video tape recorder 1 or the video tape recorder 5 connected to 1 is operated to supply the video signal VP1 or the video signal VP2 to the television 11, and
By automatically switching the signal switch 15, it is determined that a signal has been supplied. Therefore, the television 11 can be turned on without operating the power switch, and the image of the video signal VP1 or the video signal VP2 can be automatically displayed on the screen. Further, by stopping the video tape recorder 1 or the video tape recorder 5 so that the video signal VP1 or the video signal VP2 is not supplied, the power switch of the television 11 can be turned off.

In the present embodiment, the case where two video tape recorders are connected to the television 11 has been described, but a plurality of video tape recorders and video disc players are provided according to the number of input terminals of the television 11. You may connect video equipments such as.

Further, a switch may be provided in the signal path of the video signal detector 16 of the television 11 or the determination signal SD, and the control operation of the power source can be carried out as necessary by switching the switch.

Further, not only when a video tape recorder is connected to a television but also when a cassette deck or the like is connected to an audio amplifier, the supply of an audio signal is determined, and in the field of information equipment, it is determined by a data signal or the like. May be performed.

[0033]

According to the present invention, when a signal of a certain system is supplied to the signal switching means, the system is brought into a selected state so that the signal is output to the output side of the signal switching means and the signal detecting means. When it is detected by the control means, the control means stops the switching operation of the signal switching means to maintain the selected state of the system, and the operation of the signal processing means is started to perform the signal processing. Further, when the signal is stopped and the signal is not detected by the signal detecting means, the operation of the signal processing means is stopped by the control means. Therefore, the operation can be automatically controlled without operating the operation switch in relation to the supply of the signal of the device connected to the outside.

[Brief description of drawings]

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

FIG. 2 is a flowchart showing a control operation of the embodiment.

[Explanation of symbols]

 1,5 Video tape recorder 2,6 Playback signal processing section 3,7 Video output terminal 11 Television 12,13 Video input terminal 14 Tuner section 15 Signal switcher 16 Video signal detector 17 Microcomputer 18 Image processing section

Claims (2)

[Claims] 1. A signal switching means for selectively switching and outputting a plurality of systems of signals, a signal detecting means for detecting whether or not the signal is output to the output side of the signal switching means, and the signal switching. Signal processing means for processing the signal output to the output side of the means, and control means for controlling the operation of the signal switching means and the operation of the signal processing means based on the detection output of the signal detecting means, When the signal detecting means detects that the signal is being output to the output side of the signal switching means in a state in which the signals of the plurality of systems are sequentially and repeatedly selected by the switching operation of the signal switching means, An electronic device, wherein the control means stops the switching operation of the signal switching means and puts the signal processing means into an operating state. 2. The control means releases the operating state of the signal processing means when the signal detecting means detects that the signal is no longer output to the output side of the signal switching means. The electronic device according to claim 1.