JP2002135683A - Power on/off detector of television receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a detector to detect whether a power of a television receiver is turned on, and to notify a power state of the television receiver to external equipment. SOLUTION: The detector 10, for detecting power on/off of the television receiver TV which can be operated by a remote operation part, is provided with a detecting part 1 to output a signal to indicate the power of the television receiver TV is turned on, an on/off-determining part 2 to output a power state signal, to indicate whether the power of the television receiver TV is turned on, in response to presence/absence of output from the detecting part 1, and a control part 3 for transmitting a display signal to indicate whether a power switch of the television receiver TV is turned on, according to the power state signal to the external equipment CL and to receive a control signal to operate the remote operation part RC from the equipment.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a detection device for detecting on / off of a power supply of a television receiver and notifying the detection to the outside.

[0002]

2. Description of the Related Art Generally, when a television receiver is remotely controlled, a remote control unit, a so-called remote control device, is used. There is an application in which the remote operation unit itself is controlled from another remote place to turn on and off the power of the television receiver. One example of such an application is when a normal television receiver is used as a monitoring monitor of a monitoring camera system when necessary. In this application, a controller for controlling the surveillance camera is provided with control signal generation means for generating a control signal for operating the remote operation unit, and remote control is performed by a control signal issued from the control signal generation means. The power switch of the television receiver is turned on and off by operating the unit. Thus, the television receiver can be used as a monitoring monitor only when necessary.

[0003] However, a commonly used remote control only switches the power switch of the television receiver from on to off or from off to on by one operation. That is, the remote control unit only outputs a signal for operating to switch the power switch of the television receiver. Therefore, if the power switch of the television receiver is operated by the remote control unit without knowing the power state of the television receiver, an unintended switching may be performed. However, if the controller of the surveillance camera system attempts to directly control the power switch of the television receiver, it is necessary to further provide a signal input terminal for control and a control circuit in the television receiver, which is an inexpensive general television. Since the television receiver cannot be used, the cost of the television receiver may be increased.

[0004]

SUMMARY OF THE INVENTION The present invention has been proposed to solve the above-mentioned problems, and detects whether or not the power of a television receiver is turned on, thereby detecting an external device. It is an object of the present invention to provide a detection device which can notify a power supply state of a television receiver to the device, and can avoid erroneous operation of the television receiver by the device.

[0005]

According to one aspect of the present invention, there is provided an apparatus for detecting power on / off of a television receiver, wherein a power supply of the television receiver is controlled. Detecting means for detecting whether the signal is turned on or off, and means for transmitting a display signal representing a detection result of the detecting means to a device arranged outside the apparatus. A detection device characterized by the above-mentioned.

In order to achieve the above object, a second aspect of the present invention is a device for detecting the power on / off of a television receiver which can be remotely controlled by a remote control unit. A detection unit that outputs a signal oscillated from the television receiver when is turned on, and in response to the presence or absence of an output from the detection unit, the power of the television receiver is turned on or off. An on / off determining unit that outputs a power status signal indicating whether the power is on or not, and a display indicating whether a power switch of the television receiver is on or off in accordance with the power status signal A control unit for transmitting a signal to a device arranged outside the device.

According to a third aspect of the present invention, the detection result can be displayed on the device. According to a fourth aspect of the present invention, the control unit receives a control signal for operating the remote operation unit from the device.

According to a fifth aspect of the present invention, the detecting section detects a signal unique to a video signal oscillated from the television receiver. The invention according to claim 6 is characterized in that the detection unit detects an audio intermediate frequency signal in the television receiver.

According to a seventh aspect of the present invention, there is provided an apparatus for detecting power on / off of a television receiver which can be remotely controlled by a remote control unit, wherein an optical sensor for detecting brightness of a screen of the television receiver is provided. A detection unit provided, and an on / off determination unit that outputs a power status signal indicating whether the power of the television receiver is on or off in response to the presence or absence of an output from the detection unit And a control signal for sending a display signal indicating whether a power switch of the television receiver is on or off in response to the power state signal to a device arranged outside the apparatus. And a control unit for receiving the detection information.

According to an eighth aspect of the present invention, the on / off determining section rectifies a signal output from the detecting section when the power is on and outputs a DC signal; And a determination unit that outputs the power state signal in accordance with the presence or absence of the DC signal.

According to a ninth aspect of the present invention, the control unit allows the remote operation unit to be operated by the device in accordance with the output of the on / off determination unit.

[0012]

In response to the presence or absence of a signal oscillated from the television receiver when the power of the television receiver is on or a signal corresponding to the brightness of the screen of the television receiver, the power supply of the television receiver is turned on. Is turned on or off, and according to the result of the judgment, a display signal indicating whether the power switch of the television receiver is on or off is transmitted to the device. Send to externally located devices. The device can send out a control signal for operating the remote control.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a detection device according to the present invention will be described below with reference to FIGS.
In FIG. 1, the power of the television receiver TV is turned on / off.
Off switching, channel switching, volume adjustment, image quality adjustment, and the like are remotely controlled by a remote control unit RC.
In that case, a detecting device 10 is provided in relation to the television receiver TV to detect whether the power of the television receiver TV is on or off. In this embodiment, when necessary, the television receiver T
V can also be used as a surveillance monitor for a surveillance camera system. For this reason, the detection device 10 can transmit and receive, for example, an optical signal to and from the controller CL disposed at a location remote from the remote operation unit RC. Thereby, the controller CL can control the operation of the remote operation unit RC.

For example, the controller CL is a sensor device for detecting the arrival of a visitor to the entrance. When the sensor device detects the arrival of the visitor, the controller CL controls the remote controller RC to supply power to the television receiver TV. The user turns on the switch so that the television receiver TV can be used as a monitor.

The detecting device 10 includes a television receiver TV
Has a detection unit 1 attached at an appropriate position. The detecting unit 1 includes, for example, a loop antenna. The loop antenna allows the television receiver TV to operate at a point in time when the television receiver TV is turned on and thereafter during a period in which the television receiver TV is operating. Signal oscillated from the video signal circuit or audio signal circuit (hereinafter referred to as oscillation signal)
And output. The oscillation signal is, for example, a horizontal synchronization signal (15.750 kHz), a vertical synchronization signal (60H
z), a video intermediate frequency signal (58.75 MHz), a chrominance subcarrier (3.58 MHz), and an audio intermediate frequency signal (4.5.
MHz), each having a unique frequency.
Thus, the detection unit 1 outputs an oscillation signal after the power of the television receiver TV is turned on, and does not output any signal when the power of the television receiver TV is turned off.

The detecting device 10 further has an on / off determining unit 2 connected to the output side of the detecting unit 1. The on / off determining unit 2 determines whether the power of the television receiver TV is on or off according to whether or not the oscillation signal is supplied from the detecting unit 1. When it is determined that the power is on, a power-on signal is provided to the control unit 3 when it is determined that the power is off.

The control unit 3 receives the above-mentioned power-on signal and power-off signal, notifies the controller CL of the determination result of the on / off determination unit 2, and receives a control signal from the controller CL to control the remote operation unit RC. Can work. In order to realize this, the connection between the control unit 3 and the controller CL and the connection between the control unit 3 and the remote operation unit RC are made by, for example, an optical signal.
The controller CL notifies the controller CL of the determination result of the on / off determination unit 2 so that the controller CL can know whether the power of the television receiver TV is on or off. ) Receives a control signal for switching the power switch of the television receiver TV from the controller CL and sends it to the remote operation unit RC.

That is, when the control unit 3 receives the power-on signal from the on / off determination unit 2, the control unit 3 sets the television receiver TV
Is transmitted to the controller CL, indicating that the power supply is turned on. Upon receiving this, the controller CL operates its display unit (not shown) to display that the power of the television receiver TV is on. Similarly, when receiving the power-off signal from the on / off determining unit 2, the control unit 3 transmits a display signal indicating that the power of the television receiver TV is off to the controller CL, and responds to this. Then, the controller CL stops the operation of the display unit.

Thus, the state of the power switch of the television receiver TV is displayed on the controller CL.
Therefore, the controller CL operates the television receiver T
When it is displayed that the power switch of V is off, it is determined that the television receiver TV is not used for viewing and may be used as a monitoring monitor. It is understood that a control signal for turning on the power switch of the television receiver TV from the controller CL to the control unit 3 may be transmitted to the control unit 3 for use as a monitoring monitor. On the other hand, when the controller CL is displaying that the power switch of the television receiver TV is on, it is determined that the television receiver TV is being used for viewing. It is understood that a control signal for turning off the receiver TV must not be transmitted.

When the control signal transmitted from the controller CL is received according to the power state of the television receiver TV, the control unit 3 transmits an optical signal representing the control content of the control signal to the remote control unit RC. The user operates the power supply operation switch of the remote control unit RC. Thereby, the remote control unit RC switches the power switch of the television receiver TV from off to on or from on to off.

FIG. 2 is a block diagram schematically showing the configuration of the on / off judging section 2. In the figure, an oscillation signal such as a horizontal synchronizing signal output by the detection unit 1 at the time when the power of the television receiver TV is turned on and thereafter is amplified by the amplification unit 7 at a high frequency, and the frequency of the oscillation signal is changed The bandpass filter 8 having the center frequency is passed. The oscillation signal from which unnecessary signals have been removed by the bandpass filter 8 is amplified again by the amplifier 9 and then rectified by the rectifier 10 to be converted into a DC signal. When this DC signal is applied, the determination unit 11 determines that the power of the television receiver TV is turned on, and outputs a power-on signal to the control unit 3.
Send to

On the other hand, when the power of the television receiver TV is turned off, the detecting unit 1 does not output an oscillation signal, so that the rectifying unit 10 in the on / off determining unit 2 does not output a DC signal. Therefore, since the DC signal does not reach from the rectifying unit 10, the determining unit 11 sends a power-off signal to the control unit 3.

In the above description, the detection device 10
As long as the detection unit 1 is arranged at a position where the oscillation signal can be received, the detection unit 1 can be attached to an arbitrary position such as a front surface or a side surface of the television receiver TV.

Although one embodiment of the detection device according to the present invention has been described above, the present invention is not limited to such an embodiment. For example, the detection unit 1 only needs to be able to receive a signal having a frequency oscillated from a television receiver, such as a horizontal synchronization signal or a vertical synchronization signal, so that various types of antennas other than the loop antenna can be used. It is possible. For example, if an amplifier having a high impedance input is used as the amplification unit 7 of the on / off determination unit 2, the detection unit 1 can be a single wire. Moreover, the detection unit 1 may be capable of detecting two or more signals simultaneously. This makes it possible to more accurately detect the state of the power supply of the television receiver. The detection unit 1 does not detect the signal of the frequency oscillated from the television receiver, but uses the output from the optical sensor capable of detecting the brightness of the screen to determine whether the power is on or off. You may make it.

In the above description, the result of the determination as to whether the power switch of the television receiver TV is on or off is supplied from the control unit 3 to the controller CL. It can be applied to other uses. For example, if the detection device 10 is installed in a television receiver in a solitary home for the aged, and the result of the above determination by the control unit 3 is sent to the care center, the care receiver can operate the television receiver at the care center. Since it is possible to know whether or not the care receiver has performed the power supply operation, the abnormality of the care receiver can be detected based on the fact that the power supply operation is not performed for a certain period.

Further, in the above description, the control unit 3 operates the remote control unit RC in accordance with the control signal from the controller CL, regardless of the result of the judgment by the on / off judgment unit 2, so that the television receiver TV Power switch. Instead of this, the control unit 3
The remote control unit RC may be operated or not operated according to a power-on signal or a power-off signal supplied from the on / off determining unit 2. That is, the control unit 3 turns on the power switch of the television receiver TV from the controller CL when the power switch of the television receiver TV is off and the power off signal is output from the on / off determination unit 2. Only when a control signal is received, the remote control unit RC is operated to turn on the power switch of the television receiver TV. Conversely, the power switch of the television receiver TV is on, and When the power-on signal is output from the off-judgment unit 2,
Even if a control signal for turning on or off the power switch of the television receiver TV is received from the controller CL,
No signal may be transmitted to the remote control unit RC.

[0027]

As will be understood from the above description, according to the present invention, it is possible to know whether the power of the television receiver is on or off at a place remote from the remote control unit. From such a place, the operation according to the power supply state of the television receiver can be appropriately performed, and therefore, the television receiver for viewing television programs without using a dedicated monitor provided with a control terminal. Has a special effect that it can be used as a monitoring monitor. In addition, such a television receiver is already provided with an infrared ray receiving unit, and a remote control unit is also attached as an accessory when the television receiver is purchased, so that the television receiver can be used as a monitoring monitor. There is no need to add special equipment.

In addition, not only the operation of turning on and off the power switch of the television receiver, but also other operations, for example, an operation of supplying an external input to the television receiver by input switching, the operator is required to be operated. Since the power state of the television receiver can be known, when the power switch of the television receiver is off, it is only necessary to perform an operation of turning on the power and then perform another desired operation, so that there is no needless operation. It also has a special effect.

[Brief description of the drawings]

FIG. 1 is a diagram schematically showing one embodiment of a detection device according to the present invention.

FIG. 2 is a block diagram schematically showing a configuration of an on / off determining unit of FIG. 1;

[Explanation of symbols]

10: detection device, 1: detection unit, 2: on / off determination unit, 3: control unit, TV: television receiver, R
C: Remote control unit, CL: Controller

Claims (9)

[Claims] 1. An apparatus for detecting power on / off of a television receiver, wherein the power of the television receiver is turned on,
Detecting means for detecting whether the device is turned off, and means for transmitting a display signal representing a result of detection by the detecting means to a device arranged outside the device. apparatus. 2. An apparatus for detecting power on / off of a television receiver which can be remotely controlled by a remote control unit, and outputs a signal indicating that the power of the television receiver is on. A detection unit; and an on / off determination unit that outputs a power status signal indicating whether the power of the television receiver is on or off in response to the presence or absence of an output from the detection unit. A control unit that sends a display signal indicating whether a power switch of the television receiver is on or off in response to the power state signal to a device arranged outside the apparatus. A detection device, comprising: 3. The detection device according to claim 1, wherein the detection result can be displayed on the device. 4. The detection device according to claim 2, wherein the control unit receives a control signal for operating the remote operation unit from the device. 5. The detection device according to claim 2, wherein the detection unit detects a signal unique to a video signal oscillated from the television receiver. 6. The detection device according to claim 2, wherein the detection unit detects an audio intermediate frequency signal in the television receiver. 7. An apparatus for detecting power on / off of a television receiver which can be remotely operated by a remote operation unit, comprising: a detection unit including an optical sensor for sensing light and dark of a screen of the television receiver; An on / off determination unit that outputs a power status signal indicating whether the power of the television receiver is on or off in response to the presence or absence of an output from the detection unit; A control unit for transmitting a display signal indicating whether a power switch of the television receiver is on or off in response to a signal to a device arranged outside the device. A detection device characterized by the above-mentioned. 8. A rectification unit for rectifying a signal output from the detection unit when the power is on and outputting a DC signal, wherein the ON / OFF determination unit includes a DC signal from the rectification unit. And a determination unit that outputs the power supply state signal in accordance with
The detection device according to claim 2. 9. The apparatus according to claim 2, wherein the control unit allows the remote operation unit to be operated by the device according to an output of the on / off determination unit.
The detecting device according to any one of the above.