JP2006319877A - Television receiver and control method therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent electrical troubles securely from occurring in a television receiver which operates so that it may be in the status that broadcasting of the emergency warning system can be displayed according to the receiving urgent alarm signal, the troubles of which are probable when the urgent alarm signal is received due to the occurrence of disturbance (fall, falling) accompanying earthquake etc. and after that it is turned on automatically. <P>SOLUTION: When the fall of a television receiver 1 is detected by a tilt sensor 12, it is controlled so that at least the power source for the drive of the dislay portion may not be turned on henceforth. Thereby, when the above fall is due to earthquake, and also when the urgent alarm signal is received behind, the power source for the drive of the display portion 7 which serves as relatively high voltage is made so as not to be turned on, preventing such electrical troubles from occurring as, for example, emitting smoke, ignition etc. , even when the display drive portion 6 etc. are damaged and destroyed. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  INDUSTRIAL APPLICABILITY The present invention particularly relates to a television receiver that operates so as to be able to display broadcast contents of an emergency alert broadcast in response to reception of an emergency alert signal, and control suitable for application to such a television receiver. Regarding the method.

In television broadcasting, in the event of an emergency disaster such as an earthquake or tsunami, an emergency warning broadcast is issued to send an emergency warning signal and control the television receiver side to receive an emergency warning broadcast for providing information about the emergency disaster. I have a system.
Some television receivers compatible with such an emergency warning broadcast issuing system are designed to activate a power supply in response to receiving an emergency warning signal. In other words, it stands by in a standby state where it can receive an emergency alert signal, and operates to automatically receive an emergency alert broadcast by starting the power supply in response to the receipt of the emergency alert signal. It is.

In addition, about the related prior art, the following patent documents can be mentioned.
Japanese Patent Laid-Open No. 4-163585

However, the television receiver that is automatically activated in response to the reception of the emergency warning signal as described above has the following problems.
For example, when an earthquake occurs as a disaster in which an emergency warning signal is transmitted, there is a possibility that a disturbance such as a fall or a fall may occur in the television receiver. The occurrence of a disturbance due to such a fall or falling may damage or destroy the circuit in the television receiver. In such a case, an emergency warning signal is received and the power is turned on. Electrical trouble may occur. As an example, when the power source is turned on in a state where the display unit that requires a relatively high voltage power source is destroyed or damaged, there is a high possibility that troubles such as smoke and fire will occur.

Therefore, in the present invention, in view of the above problems, a television receiver is set as follows.
In other words, a display display unit for displaying an image is displayed to display an image according to the broadcast signal, and the broadcast content of the emergency alert broadcast is displayed in response to the reception of the emergency alert signal inserted into the broadcast signal. The television receiver that operates so as to be in a possible state is provided with disturbance detection means for detecting disturbance generated in the television receiver.
In addition, when a disturbance is detected by the disturbance detecting means, a power supply that performs power control to control at least the drive power of the display display unit to be not turned on and can receive the emergency warning signal thereafter. Control means for performing control so as to be in a state is provided.

  According to the above configuration, for example, when a disturbance occurs in the television receiver due to an earthquake, for example, even if an emergency warning signal is detected (received), control is performed so that at least the drive power of the display display unit is not turned on. Is done.

  In this way, according to the present invention, it is controlled so that at least the drive power of the display unit is not turned on in response to the occurrence of a disturbance due to an earthquake or the like. As a television receiver that operates so as to be able to display broadcast contents, it is possible to reliably prevent the occurrence of electrical troubles such as smoke and fire.

  Further, according to the present invention, by controlling the power supply so that an emergency warning signal can be received in response to detection of a disturbance, the disturbance is caused by an earthquake and an emergency warning signal is transmitted later. In this case, the emergency alert signal can be received. In other words, according to the present invention as described above, after detecting a disturbance, it is possible to prevent the occurrence of an electrical trouble without transitioning to a state where the broadcast content of the emergency alert broadcast can be displayed in response to the reception of the emergency alert signal. On the other hand, for example, this can be notified externally in response to the reception of the emergency warning signal.

Hereinafter, the best mode for carrying out the invention (hereinafter referred to as an embodiment) will be described.
FIG. 1 is a block diagram showing an internal configuration of a television receiver 1 as an embodiment of the present invention.
The television receiver 1 according to the embodiment is a television receiver compatible with terrestrial digital broadcasting. In addition, in the event of an emergency disaster such as an earthquake or tsunami, an emergency alert broadcast issuing system that receives an emergency alert broadcast for providing information related to an emergency disaster by controlling the television receiver side with an emergency alert signal transmitted by the broadcast station A configuration corresponding to (EWS: Emergency Warning System) is adopted.

First, a broadcast wave by terrestrial digital broadcasting is received by an antenna 2 shown in the figure, converted into a predetermined high-frequency signal by a built-in LNB (Low Noize Block Down Converter), and digital broadcasting provided in the television receiver 1. The signal is supplied to the reception tuner unit 3.
The digital broadcast reception tuner unit 3 receives a carrier (reception frequency) determined based on an instruction from the system controller 10 to be described later as a reception signal converted into a predetermined frequency in this way, for example, Viterbi demodulation A TS (Transport Stream) is obtained by performing processing, error correction processing, and the like.

Here, as is well known, TS based on the digital terrestrial broadcasting standard is compressed data obtained by compressing video signals and audio signals of a plurality of programs (video programs) by MPEG2 (Moving Picture Experts Group Layer2) system, and various types of data. Additional information is multiplexed.
Then, the compressed data obtained by compressing the video signal and the audio signal is multiplexed as an ES (Elementary Stream). As additional information inserted by the broadcasting side, PSI (Program Specific Information) for storing tables such as PAT (Program Association Table) and PMT (Program Map Table), SI (Service Information: Program Sequence Information) ) And the like.
The above information is multiplexed by forming a TS with a 188-byte transport stream packet (TS packet) and storing the ES and various additional information in the TS packet. .
The TS obtained by the digital broadcast receiving tuner unit 3 as described above is supplied to the broadcast signal processing unit 4.

  Also, the digital broadcast receiving tuner unit 3 acquires a PSI (Program Specific Information) packet from the TS, updates the channel selection information, and obtains a component PID (Program ID) of each channel in the TS. To the system controller 10. The system controller 10 uses the acquired PID for received signal processing.

  Although not shown in the figure, the digital broadcast receiving tuner unit 3 and other components in the television receiver 1 (broadcast signal processing unit 4, video signal processing unit 5, audio signal processing unit 8, display drive) Data exchange between the unit 6) and the system controller 10 can be performed via the bus 17 in the figure.

  In this case, the digital broadcast receiving tuner unit 3 is provided with an EWS detection unit 3a for detecting (receiving) an emergency warning signal transmitted from the broadcast station side in the emergency warning broadcast issuing system. The EWS detection unit 3a refers to the value of the activation bit in the TMCC (Transmission and Multiplexing Configuration and Control) information in the TS obtained as described above, and determines whether or not the value is a predetermined value. To do. That is, an emergency warning signal is detected in response to the activation bit being a predetermined value. When an emergency warning signal is detected, an EWS notification is sent to the system controller 10. For example, a signal of L is supplied to the system controller 10 when an emergency warning signal is not detected, and a signal of H is supplied to the system controller 10 when it is detected.

The broadcast signal processing unit 4 includes at least a demultiplexer and an MPEG decoder.
The demultiplexer separates necessary TS packets from the TS in accordance with the filter conditions set by the system controller 10. Thereby, in the demultiplexer 13, as a TS packet for one target program, for example, as a video program, a TS packet of video data compressed by the MPEG2 system and a TS packet of audio data compressed by the MPEG2 system Will get. The compressed video data and compressed audio data obtained in this way are output to the MPEG decoder.
The individual packets of compressed video / audio data separated by the demultiplexer and input to the MPEG decoder are in a format called PES (Packetized Elementary Stream).

The MPEG decoder in the broadcast signal processing unit 4 synchronizes the above-described compressed video data with the video data output according to the MPEG2 format and the video decoder that decodes (decompresses) the compressed video data according to the MPEG2 format. And an audio decoder for performing a decoding process. The input compressed video data is decoded by a video decoder, and the input compressed audio data is decoded by an audio decoder.
In this case, the decoded video data is subjected to necessary signal processing so that image display is appropriately performed in accordance with a predetermined television system such as the NTSC system, and the digital video data (Video). Get.
The decoded audio data is output as digital audio data (Audio).

The digital audio data obtained by the broadcast signal processing unit 4 is supplied to the audio signal processing unit 8 and subjected to necessary audio signal processing, converted into an analog audio signal, and output from the speaker 9 as audio.
The digital video data is supplied to the video signal processing unit 5 where vertical / horizontal synchronization signal detection and various video signal processing are performed.
The display driving unit 6 drives the display unit 7 based on the output from the video signal processing unit 5.
For example, in the case of a liquid crystal display, the display unit 7 includes a backlight together with a liquid crystal display panel. In this case, the display driving unit 6 performs not only display driving for the liquid crystal display panel but also light emission driving of the backlight.

The power supply circuit 11 is configured as an AC → DC converter that operates by inputting a commercial AC power supply (not shown), and supplies operating power to each part in the television receiver 1 based on the generated DC output voltage.
As shown, the power supply circuit 11 includes a standby power supply Est for the system controller 10, a tuner power supply Et for the digital broadcast receiving tuner unit 3, a digital power supply Ed for the broadcast signal processing unit 4, a video signal processing unit 5 and an audio. The set power source Ese for the signal processing unit 8 and the display driving circuit 6 can be separately supplied. Among these, output control of the tuner system power supply Et, the digital system power supply Ed, and the set system power supply Es is performed by the system controller 10 as described later.

The system controller 10 performs overall control of the television receiver 1.
The memory unit 13 comprehensively shows memories such as ROM and RAM included in the system controller 10. The system controller 10 controls each unit in accordance with a program stored in the memory unit 13.

The system controller 10 is provided with a user interface (I / F) 14 that allows the user to give various operation instructions to the television receiver 1. The user interface 14 includes various operation keys provided so as to be exposed to the outside of the casing of the television receiver 1 and a command receiving unit for receiving a command signal from a remote controller (not shown).
The system controller 10 is configured to control each unit according to operation information obtained via the user interface 14, and thereby, an operation according to a user instruction is executed.

  In this case, the system controller 10 controls the output power of the power circuit 11 described above. Such power output control is performed by a tuner power control signal S-EWS, a digital power control signal S-Dig, and a set power control signal S-Set supplied to the power circuit 11 as shown in the figure. .

Here, the power supply state in the television receiver 1 is controlled as shown in FIG.
First, the standby state is a state where standby power supply Est is supplied to the system controller 10. As a result, it is possible to accept operations by a remote controller or the like and to start up based on a timer. In this standby state, the system controller 10 is configured to output L as a tuner system power control signal S-EWS, a digital system power control signal S-Dig, and a set system power control signal S-Set.

  The emergency alert signal receivable state is a minimum power supply state capable of receiving the emergency alert signal, and is a state in which the tuner system power supply Et for the digital broadcast receiving tuner unit 3 is supplied together with the standby power supply Est. That is, in this case, the tuner power supply control signal S-EWS outputs H, and the digital power supply control signal S-Dig and the set power supply control signal S-Set output L.

  In the reserved recording execution state, during the reserved recording operation, video data and audio data as broadcast contents obtained by receiving and tuning in the television receiver 1 are output to an external recording device (see FIG. Medium AV output). In this case, H is output as the tuner power supply control signal S-EWS and digital power supply control signal S-Dig, and L is output as the set power supply control signal S-Set.

  The set-on state is a power state in which the entire set of the television receiver 1 operates, and the state in which image display is performed on the display unit 7 corresponds to the set-on state. In this set-on state, all of the tuner system power supply control signal S-EWS, the digital system power supply control signal S-Dig, and the set system power supply control signal S-Set are output H.

  Note that the standby state and the emergency alert signal receivable state are, for example, a power state that transitions in response to an operation for turning off the power by operating a remote controller. Whether the transition to the standby state or the transition to the emergency alert signal receivable state by the power-off operation can be made in advance based on a user operation or the like.

  In FIG. 1, the system controller 10 receives a tuner system power supply when an EWS notification is issued from the EWS detection unit 3a to notify the reception of an emergency warning signal in the state where the emergency warning signal can be received. The control signal S-EWS, the digital power control signal S-Dig, and the set power control signal S-Set are all output to H, thereby operating each part in the television receiver 1 (set to a set-on state). ) Control. That is, the broadcast content of the emergency alert broadcast can be displayed in response to the reception of the emergency alert signal.

In particular, in the present embodiment, a tilt sensor 12 is provided for the system controller 10. The tilt sensor 12 is fixed to the main body of the television receiver 1 and senses the tilt state of the television receiver 1.
In this case, the inclination sensor 12 is configured to be able to sense inclination in two orthogonal axes, and detects that the inclination angle in one of the axial directions is 45 ° or more. Composed. That is, when the inclination angle in one of the axial directions becomes 45 ° or more, a detection signal indicating that fact is supplied to the system controller 10.
In the case of the present embodiment, as the tilt sensor 12, for example, a sensor that includes a Hall element and senses the tilt angle is selected. The type using such a Hall element is relatively small as an inclination sensor, and the expansion of the mounting area can be suppressed accordingly.

Further, a first LED 15 and a second LED 16 are provided for the system controller 10. The first LED 15 and the second LED 16 are provided so as to be exposed outside the casing of the television receiver 1, and are turned on / off based on the control of the system controller 10.
The first LED 15 is turned on by the system controller 10 in response to the detection of the fall by the tilt sensor 12, and is thus provided as an LED for notifying that the television receiver 1 has fallen.
On the other hand, the second LED 16 is turned on by the system controller 10 in response to the EWS notification, and therefore functions as an LED to notify the outside that an emergency warning signal has been received.

Here, as the television receiver 1 of the present embodiment, the tilt of the television receiver 1 is detected by the inclination sensor 12 provided as shown in FIG. That is, if the inclination angle is 45 ° or more, there is a high possibility that the vehicle has fallen (dropped). When such a disturbance such as a fall or drop occurs, it can be said that there is a high possibility that the internal circuit is damaged or destroyed. Therefore, based on the detection result by the inclination sensor 12, the inside of the television receiver 1 It is possible to determine that there is a high possibility that the circuit is damaged or destroyed.
Thus, by detecting that a disturbance such as a fall or fall has occurred in the television receiver 1 due to an earthquake or the like, it is possible to determine whether or not there is a high possibility that the internal circuit is damaged or destroyed. .

In the present embodiment, in response to the fact that the tilt sensor 12 detects a fall and the internal circuit is likely to be destroyed or damaged, the display unit 7 is first driven. Control is performed so that the power is not turned on. Specifically, the system controller 10 sets an invalid flag for preventing the set power source Ese including the driving power source for the display unit 7 from being turned on.
As a result, for example, even if an emergency warning signal is received later due to the cause of the disturbance caused by the fall or fall, control for shifting to the set-on state can be prevented. As described above, the power supply for driving the display unit 7 is a relatively high voltage, and if there is damage or destruction, there is a high possibility that electrical troubles such as smoke or fire will occur. By controlling so that the set power supply Ese is not turned on as described above, it is possible to more reliably prevent such an electrical trouble from occurring.

At this time, the system controller 10 performs the operation of turning on the first LED 15 as described above in response to the detection of the fall by the inclination sensor 12. As a result, it is possible to notify the outside that a fall has been detected in the television receiver 1.
In addition, when the EWS detection unit 3a detects (receives) an emergency warning signal and the EWS notification is supplied, the second LED 16 is turned on. Thereby, when the disturbance accompanying the earthquake occurs as described above and an emergency warning signal is transmitted later, the display unit 7 is turned off, but the emergency warning signal is received by the second LED 16 itself. Can reliably notify the outside.

By the way, when the disturbance is generated and the power supply state is the set-on state where the driving power for the display unit 7 is supplied, the invalid flag is set as described above according to the detection of the disturbance. However, the driving power for the display unit 7 continues to be supplied. That is, the possibility that an electrical trouble will occur correspondingly increases.
Therefore, in response to the case where the power supply state when the disturbance occurs is the set-on state, at least an operation of stopping the supply of the set system power supply Ese is performed. As a result, it is possible to reliably prevent electrical trouble that may occur as the set-on state continues after the fall.
In this case, if there are fewer parts to be turned on, the possibility of electrical trouble can be reduced accordingly. In this case, the supply of the digital power supply Ed together with the set power supply Ese is also stopped. In this manner, the operation is performed so as to shift to an emergency warning signal reception enabled state. Thereby, generation | occurrence | production of an electrical trouble can be prevented more reliably. At the same time, the emergency alert signal can be received in this way, so that in this case as well, when the emergency alert signal is received later, the second LED 16 is receiving the emergency alert signal. Will be able to.

Further, as a power supply state when a disturbance occurs, a standby state may be considered. In this case, a set-on invalid flag is set according to the detection of the disturbance, and the state is shifted to an emergency alarm signal receivable state. As a result, even when the power supply state at the time of disturbance occurrence is in the standby state, it becomes possible to receive an emergency alert signal later when the emergency alert signal is transmitted, and the emergency alert signal is received. External notification can be made by the second LED 16.
Even in this case, it is possible to prevent a transition to the very set-on state in which the emergency warning signal is received by setting the set-on invalid flag.

Further, when the power supply state at the time of the occurrence of the disturbance is the reserved recording execution state, the supply of the digital power supply Ed is stopped and the state is changed to the state where the emergency alarm signal can be received. By reducing the number of sites that are turned on in this way, the possibility of electrical troubles can be reduced.
In this case as well, the emergency warning signal can be received after the disturbance, so that the emergency warning signal can be received when the emergency warning signal is transmitted after the disturbance. External notification can be made by 2LED16.

3 to 5 are flowcharts showing processing operations for realizing the operations according to the embodiment described above.
The processing operations shown in these figures are executed by the system controller 10 shown in FIG. 1 according to a program stored in the memory unit 13.
FIG. 3 shows a processing operation to be performed in response to an operation mainly when a disturbance (falling) is detected.
First, in step S101, it waits for a fall to be detected. That is, it waits for the detection signal which shows that the fall was detected from the inclination sensor 12 to be supplied.

In step S102, a set-on invalid flag is set in response to the detection signal supplied from the tilt sensor 12. That is, a flag for controlling the set power supply Ese not to be turned on thereafter is set.
In step S103, the first LED 15 is turned on. As a result, it is possible to notify the outside that a fall has been detected in the television receiver 1.

In the subsequent step S104, the power state is determined. The power supply state is determined by H of each power control signal (tuner power control signal S-EWS, digital power control signal S-Dig, set power control signal S-Set) supplied to the power circuit 11. This can be done by determining / L.
If the result of determination in step S104 is the standby state, in step S105, the tuner system power supply control signal S-EWS is set to H and the tuner system power supply Et is turned on, thereby transitioning to an emergency alarm signal receivable state.
If the emergency warning signal can be received, the processing operation ends.
In the reserved recording execution state, in step S106, the digital system power control signal S-Dig is set to L, and the digital system power supply Ed is turned off to make a transition to the emergency alert signal receivable state.
If it is in the set-on state, the digital power supply Ed and the set power supply Ese are turned off by setting both the digital power control signal S-Dig and the set power control signal S-Set to L in step S107. And make a transition to an emergency warning signal reception enabled state.

FIG. 4 shows the processing operation to be executed in response to the operation when the emergency alert signal is received.
First, in step S201, it waits for an EWS notification from the EWS detector 3a. When the EWS notification is supplied, the second LED 16 is turned on in step S202.

For confirmation, the processing operation shown in FIG. 3 is executed, so that after a disturbance (falling) occurs, an emergency warning signal is received regardless of the power supply state at the time of the disturbance. Transition to possible state. Thus, when an emergency warning signal is transmitted after the occurrence of a disturbance due to an earthquake, the emergency warning signal can be received (EWS notification) in step S201.
Since the emergency alert signal can be received in this way, when the emergency alert signal is generated after the occurrence of the disturbance, the emergency LED signal is reliably received by the second LED 16 in step S202. Can be notified externally.

In step S203, it is determined whether or not a set-on invalid flag has been set.
If the set-on invalid flag is not set, processing for changing to the set-on state is executed in step S204. That is, the tuner system power supply control signal S-EWS, the digital system power supply control signal S-Dig, and the set system power supply control signal S-Set are all set to H to be in the set-on state.
As a result, when the invalid flag is not set, that is, when the television receiver 1 is not overturned (disturbance is not generated), the set-on state is set in response to the reception of the emergency warning signal as usual, and the emergency warning broadcast Can be changed to a displayable state.
If it is determined in step S203 that the set-on invalid flag has already been set, the processing operation ends. That is, the power supply state is maintained as it is (in this case, an emergency warning signal can be received). Thereby, even if an emergency warning signal is received in a state where a fall is detected, the power supply for driving the display unit 7 is not turned on, and thus more reliably preventing the occurrence of electrical troubles such as smoke and fire. Can do.

By the way, there is a possibility that an operation of turning on the power by the user is performed after the fall is detected. From the viewpoint of preventing electrical trouble after a fall (disturbance), it is preferable to disable such a power-on operation.
FIG. 5 shows a processing operation for realizing an operation of invalidating the power-on operation after the fall is detected as described above.
First, in step S301, a set-on operation is waited for. That is, it waits for operation information for setting the television receiver 1 to the set-on state from the user interface 14.
If it is determined that the set-on operation has been performed, it is determined whether or not the set-on invalid flag has been set in step S302 as in the previous step S203. If the set on invalid flag has not been set, In step S303, processing for changing to the set-on state is executed. That is, as a result, when the television receiver 1 is not overturned, it can be changed to the set-on state according to the set-on operation (power-on operation) as usual.
Further, if the set-on invalid flag has been set, the processing operation is terminated, that is, the invalid flag has been set (that is, a state where a fall has been detected) has already been shown in FIG. Since the operation has been executed, the power supply state is maintained in a state where an emergency warning signal can be received.
Thereby, even if a set-on operation is performed in a state where a fall is detected, the driving power source of the display unit 7 is not turned on, and thus electrical troubles can be similarly prevented. Even in this case, as a power supply state, an emergency warning signal can be received. When an emergency warning signal is received later by the process of step S201 in FIG. 4, the second LED 16 is turned on by the process of step S202. By this, it is possible to notify the outside that the emergency alert signal has been received.

  In this way, after the fall is detected, at least the drive power of the display unit 7 is controlled so as not to be turned on, so that the set-on state is not caused even when a set-on operation is performed after the fall is detected. can do.

By the way, according to the explanation so far, in the television receiver 1 of the present embodiment, when a disturbance such as a fall is detected, the set-on state cannot be set in any case.
However, it is conceivable that the television receiver 1 is used in an intentionally inclined state. For example, when the television receiver 1 is a so-called FDP (Flat Display Panel) type television receiver including a liquid crystal display or a plasma display, it should be used in such a usage form at an exhibition or the like. Can be considered.
Therefore, the set-on state is forcibly set in accordance with a predetermined operation input regardless of whether the set-on invalid flag is set or not set so that the device can be used in an intentionally inclined state. It can also operate to make a transition.
In this case, the predetermined operation is, for example, a long press of a predetermined key or simultaneous pressing of a plurality of predetermined keys, and the operation is not described in a manual for general users. As a hidden command known by the user, it can be prevented from being operated by general users.

FIG. 6 shows a processing operation for realizing such an operation. In this case, the system controller 10 in this case first performs a predetermined key long-pressing operation or simultaneous pressing operation as described above in advance in step S401. Wait for a predetermined operation. If there is a predetermined operation, a process for ignoring the set-on invalid flag and making a transition to the set-on state is executed in step S402.
With this processing operation, even when a fall is detected and the set-on invalid flag is set when it is used intentionally tilted, the invalid flag is set. Can be forced to transit to the set-on state independently.

At this time, since the first LED 15 is provided and external notification about the fall is possible, the above-mentioned trader side can know whether or not the fall is detected in the television receiver 1. . That is, it is possible to know whether the set-on invalid flag is set and the set-on operation is invalidated.
In other words, the contractor side or the like confirms whether or not the first LED 15 is turned on / off, and in order to enter the set-on state (power-on state), whether or not the normal set-on operation should be performed or turned on by the predetermined operation as a hidden command Can be determined.

  In addition, execution / non-execution of an operation for controlling so as not to be in a set-on state in response to detection of a disturbance such as a fall can be configured to be selectable and set by a user operation. For example, an item for selecting execution / non-execution of such an ON control operation is provided as one item of a setting menu for performing various settings for the television receiver 1, and “execution” is selected as the setting content. If set, the system controller 10 executes the processing operations described so far. If “non-execution” is selected and set, the set-on invalid flag setting process (S102) shown in FIG. 3 is omitted, or the invalid flag determination process in step S203 of FIG. 4 and step S302 of FIG. For example, it may be omitted so that a set-on state can be obtained even when a fall is detected.

Here, the present invention should not be limited to the embodiments described above.
For example, in the embodiment, the case where the television receiver 1 is configured to support only terrestrial digital broadcasting is exemplified, but other configurations such as terrestrial analog broadcasting, BS digital broadcasting, BS analog broadcasting, and the like are employed. You can also.

  Further, the external notification about the disturbance detection and the external notification of the reception of the emergency warning signal are performed by the two LEDs, the first LED 15 and the second LED 16, respectively. However, only one LED is provided and each external notification is provided. Can be divided by lighting / flashing, or can be notified by different emission colors.

  In addition to external notification by lighting or blinking of light, for example, external notification may be made by other means such as external notification by voice.

In order to detect disturbance, the inclination sensor 12 is provided to detect only a fall.
However, the term “disturbance” as used in the present invention refers to an impact that is assumed to cause damage to the internal circuit due to shaking caused by an earthquake or the like, and is assumed to be able to detect this. Any other sensor can be used.
For example, a gravitational acceleration sensor may be provided, and it may be configured to detect that “disturbance” has occurred when a change in gravitational acceleration is obtained in a mode assumed to cause destruction of an internal circuit. In this way, if the “disturbance” is detected using the gravitational acceleration sensor, in addition to the fall / fall of the television receiver itself, the impact applied when another object falls / falls from the outside. Can be detected, and the occurrence of electrical troubles can be prevented more reliably.

In the present embodiment, the power state that can be taken by the television receiver 1 is set to the standby state, the emergency alarm signal receivable state, the reserved recording execution state, and the set-on state, but there is no reserved recording execution state. Even in this case, the present invention can be preferably applied.
Even when there are four or more possible power supply states, an emergency warning signal can be received by changing only the tuner power control signal S-EWS to H in response to the detection of the disturbance to an emergency warning signal receivable state. If there are more parts that are turned on than the alarm signal receivable state, the power of those parts is turned off, so that the occurrence of electrical trouble can be prevented more reliably. Also in this case, the emergency alert signal can be received in response to the detection of the disturbance, and if an emergency alert signal is subsequently transmitted, it is received and an external notification is received that the emergency alert signal has been received. The effects that can be achieved are the same as in the embodiment.

It is a block diagram which shows the internal structure of the television receiver as embodiment in this invention. It is a figure for demonstrating the power supply state which the television receiver of embodiment can take. It is the flowchart which showed the processing operation which should be performed corresponding to operation | movement when disturbance (falling) is detected as processing operation which the television receiver of embodiment performs. It is the flowchart which showed the processing operation which should be performed corresponding to the operation | movement when an emergency alert signal is received as a processing operation which the television receiver of embodiment performs. It is the flowchart shown about the processing operation which should be performed corresponding to power-on operation as processing operation which the television receiver of embodiment performs. It is the flowchart shown about the processing operation which should be performed corresponding to the operation | movement which forcibly turns on a power supply according to predetermined operation.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Television receiver, 2 Antenna, 3 Digital broadcast receiving tuner part, 3a EWS detection part, 4 Broadcast signal processing part, 5 Video signal processing part, 6 Display drive part, 7 Display part, 8 Audio signal processing part, 9 Speaker DESCRIPTION OF SYMBOLS 10 System controller 11 Power supply circuit 12 Inclination sensor 13 Memory part 14 User interface 15 First LED 16 Second LED 17 Bus

Claims (6)

An image display according to the broadcast signal is provided with a display display unit for displaying an image, and the broadcast content of the emergency alert broadcast can be displayed in response to the reception of the emergency alert signal inserted into the broadcast signal. In a television receiver that operates in a state,
Disturbance detection means for detecting disturbance generated in the television receiver;
When a disturbance is detected by the disturbance detection means, power control is performed so that at least the drive power of the display display unit is not turned on thereafter, and a power supply state in which the emergency alarm signal can be received is obtained. Control means for performing control,
A television receiver comprising: The control means further includes:
2. The television receiver according to claim 1, wherein control is performed so that an external notification is made in response to the reception of the emergency warning signal. The control means further includes:
2. The television receiver according to claim 1, wherein control is performed so that an external notification is made in response to a disturbance detected by the disturbance detecting means. The control means includes
Even after a disturbance is detected by the disturbance detection means, control is performed so as to forcibly turn on the power according to a predetermined operation input.
The television receiver according to claim 1.   2. The television receiver according to claim 1, wherein execution / non-execution of the power control by the control means can be selected according to an operation input. An image display according to the broadcast signal is provided with a display display unit for displaying an image, and the broadcast content of the emergency alert broadcast can be displayed in response to the reception of the emergency alert signal inserted into the broadcast signal. A control method in a television receiver that operates to be in a state,
When a disturbance occurs in the television receiver, power control is performed so that at least the drive power of the display display unit is not turned on thereafter, and a power supply state capable of receiving the emergency alarm signal is obtained. To control,
A control method characterized by that.

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