JP4618168B2 - Mobile phone equipment - Google Patents

Description

  The present invention relates to a mobile phone device, and more particularly to a mobile phone device capable of suppressing a decrease in the remaining battery level.

  In recent years, preparations for digital terrestrial broadcasting have been rapidly advanced, and in 2006, a one-segment broadcasting (one-segment broadcasting) service for portable terminals is scheduled to start. Along with this, the spread of mobile phone terminals capable of receiving terrestrial digital broadcasting is expected.

  By the way, in a broadcasting system that notifies disaster information such as earthquakes and tsunamis, the broadcasting station also serves as an audible alarm when an earthquake or tsunami that has a serious impact on human life or property occurs or an evacuation order is triggered. Emergency warning broadcasts that transmit signals and transmit disaster information via television and radio broadcasts. In terrestrial digital broadcasting, in accordance with laws and standards, a terrestrial digital television receiver is configured to constantly monitor the presence or absence of an emergency warning signal embedded in a stream of broadcast data.

  Further, in the mobile phone terminal, it is required to reduce the size of the battery so as not to impair portability. In addition, it is required to suppress current consumption as much as possible so that a mobile phone terminal can be used for a long time with a limited capacity of a small battery.

  Various techniques have been proposed for ensuring necessary power in an emergency.

  For example, Patent Document 1 discloses that a normal battery that supplies power in a normal time, an emergency battery that holds power necessary for making an emergency call, and supply of power from the emergency battery by an input operation are started. A portable communication device including an emergency input means is described. And when making an emergency call, it describes that an emergency input means can make an emergency call reliably by switching to the electric power supply from an emergency battery.

  Further, for example, Patent Document 2 asks whether or not to continue outputting the emergency alert program when a predetermined time has elapsed since the emergency alert notification signal from the broadcast wave was detected and the output of the emergency alert program started. A digital television receiver that displays a GUI and forcibly turns off the power supply to the output processing unit of the emergency alert program when the emergency alert program output continuation operation is not performed is described. The digital television receiver described in Patent Document 2 prevents the emergency alarm program from being output unnecessarily when the user is absent, thereby reducing power consumption.

  Further, in Patent Document 3, when the battery remaining level becomes lower than the threshold value of the graphics display function stop condition, the graphics display function is stopped, the battery remaining level is continuously detected, and the battery remaining level is detected. A portable terminal device is described that stops the video display function when the amount level becomes lower than the threshold value of the video display function stop condition.

JP 2004-48619 A (paragraphs 0005, 0019-0023, 0060) Japanese Patent Laying-Open No. 2005-51501 (paragraphs 0010-0038) JP 2004-12857 A (paragraph 0011)

  Since the portable communication device described in Patent Document 1 is configured to include an emergency battery in addition to the normal battery, it is difficult to reduce the size and weight of the device, and the portability of the device is impaired. is there.

  In addition, the digital television receiver described in Patent Document 2 prevents the emergency alert program from being output unnecessarily when the user is absent, thereby reducing power consumption. However, only the power consumption related to the output of the emergency warning program when the user is absent can be reduced. Therefore, even if the technology described in Patent Document 2 is applied to a mobile phone device, the effect of reducing power consumption is limited, and when the user of the mobile phone device makes a call, the remaining battery level is not sufficient. When a person wants to make a call, a situation may occur in which the call cannot be made.

  When a disaster such as an earthquake occurs, charging cannot be performed due to a power failure, and as a result, it is expected that the mobile phone device cannot communicate.

  In addition, immediately after the occurrence of an emergency such as a disaster, congestion or the like occurs, and a situation in which telephone communication cannot be performed occurs. For this reason, the user may continuously perform key operations such as outgoing calls to exhaust the battery, or leave the mobile phone terminal in the standby state and wait for recovery from congestion, etc. to exhaust the battery. There are things to do. As a result, a situation occurs in which communication cannot be performed when the user wants to perform communication.

  Therefore, an object of the present invention is to provide a mobile phone device capable of securing the remaining amount of battery so that a user can make an emergency contact even when an emergency such as a disaster occurs.

A mobile phone device according to the present invention is a mobile phone device capable of receiving broadcast data, which receives broadcast data and detects an emergency alarm signal included in the broadcast data, and captures an image. A camera, a transmission circuit that transmits a radio signal to the base station, a reception circuit that receives a radio signal from the base station, an input key to which an instruction from the user is input, a power supply that supplies voltage, and a digital Television broadcast reception circuit, camera, transmission circuit, reception circuit, voltage supply control means for controlling supply of voltage to input key, digital television broadcast reception circuit, camera, transmission circuit, reception A circuit and control means for instructing the voltage supply control means to supply voltage to the input key or to stop voltage supply. The control means receives digital television broadcast reception. After the emergency warning signal is detected by the circuit, the voltage supply control means repeatedly reduces the number of voltage supply objects, gradually decreases the number of voltage supply objects, and decreases the number of voltage supply objects. in the process of repeating, the voltage supply control unit, the voltage supply to the digital television broadcast receiver circuit and the camera is stopped, and to perform the voltage supply to the transmitting circuit and the input keys, and received when the incoming call waiting state It is characterized in that a voltage is periodically supplied to the circuit.

According to such a configuration, the control means reduces the number of circuits to be supplied with voltage to the voltage supply control means after the emergency alarm signal is detected by the digital television broadcast receiving circuit , so that the remaining amount of the battery It is possible to secure the remaining amount of battery so that the user can make an urgent contact while suppressing the decrease of the battery.

Control means, the voltage supply control unit, the voltage supply to the digital television broadcast receiver circuit and the camera is stopped, and to perform the voltage supply to the transmitting circuit and the input keys, and received when the incoming call waiting state When the voltage supply is periodically supplied to the circuit and the predetermined period has elapsed, the voltage supply control means instructs the voltage supply control means to turn off the power of the mobile phone device. According to the instructions of the means, the power of the mobile phone device is turned off, and the control means inputs an instruction to turn on the power of the mobile phone device by the input key after the power supply of the mobile phone device is turned off by the voltage supply control means. The voltage supply control means stops the voltage supply to the digital television broadcast receiving circuit, the camera and the receiving circuit, and the power to the transmitting circuit and the input key is stopped. When the power supply is performed and when a call instruction is input by the input key, the voltage supply control means supplies power to the receiving circuit, so that only the call from the mobile phone device and the call after the call can be made. It may be configured to. According to such a configuration, it is possible to easily ensure the remaining amount of the battery.

In addition , it is easy to secure the remaining amount of the battery, and even when congestion or the like recovers after the congestion or the like continues for a long time in an emergency situation, the mobile phone device can make a call from the user himself / herself.

Even before the emergency warning signal is detected, the control means causes the voltage supply control means to periodically supply a voltage to the receiving circuit when the incoming call is waiting, and after the emergency warning signal is detected, reception when the incoming call is in a standby state. The power supply cycle to the circuit may be longer than before the emergency warning signal is detected . According to such a configuration, it is possible to realize a state in which incoming calls can be accepted while suppressing current consumption.

A key backlight for lighting an input key, and a display unit for displaying an image, and a display unit backlight is a backlight of the display unit, the control means, the emergency alert signals detected before the input key When the instruction input from the user is detected , the voltage supply control means supplies the voltage to the key backlight and the display unit backlight, and the instruction input from the user to the input key is no longer detected. When the time has elapsed, the voltage supply control means lowers the supply voltage to the key backlight and the display unit backlight from before the predetermined time has elapsed, or supplies the voltage to the key backlight and the display unit backlight. It is stopped, and after the emergency alarm signal detection, when detecting the instruction input from the user to input keys, the voltage supply control unit, the previous emergency alert signals detected A voltage lower than the supply voltage to the key backlight and the display unit backlight before the lapse of a predetermined time is supplied to the key backlight and the display unit backlight, and detection of an instruction input from the user to the input key is no longer detected. When the time has elapsed, the voltage supply to the key backlight and the display unit backlight is stopped, and after the emergency warning signal is detected, the voltage supply control means is connected to the digital television broadcast receiving circuit, the camera and the receiving circuit. When the voltage supply is stopped, the voltage supply to the key backlight and the display unit backlight may also be stopped . According to such a configuration, even when the user is editing the mail by key operation or when the outgoing operation is continuously performed at the time of congestion, the battery consumption is suppressed more than usual. Can do.

A key backlight for lighting an input key, and a display unit for displaying an image, and a display unit backlight is a backlight of the display unit, the control means, the emergency alert signals detected before the input key When the instruction input from the user is detected , the voltage supply control means supplies the voltage to the key backlight and the display unit backlight, and the instruction input from the user to the input key is no longer detected. When the time has elapsed, the voltage supply control means lowers the supply voltage to the key backlight and the display unit backlight from before the predetermined time has elapsed, or supplies the voltage to the key backlight and the display unit backlight. is stopped, and after the emergency alarm signal detection, even when detecting the instruction input from the user to input keys, the voltage supply control unit, Kibakkura The voltage supply to the bets and the display unit backlight may be configured to stop. According to such a configuration, even when the user is editing the mail by key operation or when the outgoing operation is continuously performed at the time of congestion, the battery consumption is suppressed more than usual. Can do.

  According to the present invention, even when an emergency such as a disaster occurs, the remaining battery level can be secured so that the user can make an emergency contact.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram showing an embodiment of a mobile phone device according to the present invention. A cellular phone device illustrated in FIG. 1 includes a base station antenna 1, a transmission / reception duplexer 2, a reception circuit 3, a transmission circuit 4, a display backlight 5, a key backlight 6, and a control circuit 7. A power control circuit 8, a battery 9, an input key 10, a first timer circuit 11, a second timer circuit 21, and a digital television broadcast receiving circuit (hereinafter referred to as a digital television receiving circuit) 12. And a camera 13.

  The base station antenna 1 is an antenna used for communication with a base station. The receiving circuit 3 performs processing for receiving a radio signal from the base station. The transmission circuit 4 performs radio signal transmission processing for the base station. The transmission / reception duplexer 2 separates transmission and reception. That is, the transmission / reception duplexer 2 separates a radio signal transmitted from the transmission circuit 4 to the base station and a radio signal received from the base station by the reception circuit 3.

  The battery 9 is a battery serving as a power source for the mobile phone device, and supplies a voltage.

  The input key 10 is a user interface through which various instructions such as data such as letters, numbers, and symbols and instructions for executing a function selected by the user are input from the user. A specific example of the input data is, for example, a telephone number. In addition, as a specific example of an instruction input from the user, for example, there is an instruction for receiving an incoming call (setting for receiving an incoming call when receiving an incoming call). The input keys 10 include not only various keys provided on the front surface of the mobile phone device but also side keys provided on the side surface of the mobile phone device. In the following description, the input key 10 does not mean only a key (button), but an operation unit including the key (excluding the key backlight 6).

  Although not shown, the mobile phone device according to the present invention displays various images and data such as digital television broadcast images, GUI (Graphical User Interface), and data (for example, contents of e-mail). A display device. The display unit backlight 5 is a backlight of a display device (not shown), and makes the display on the display device bright and easy to see. However, the brightness when the display unit backlight 5 is turned on or whether or not the display unit backlight 5 is turned on is controlled by the control circuit 7 and the power supply control circuit 8.

  The key backlight 6 is a backlight for lighting the keys included in the input keys 10 brightly. The brightness when the key backlight 6 is turned on or whether or not the key backlight 6 is turned on is controlled by the control circuit 7 and the power supply control circuit 8.

  The camera 13 takes an image. The image photographed by the camera 13 is stored in, for example, a mobile phone device. In a so-called videophone call mode, the camera 13 is directed by the user to the user's face or the like and captures images transmitted and received in the videophone call mode.

  The digital television receiver circuit 12 includes a digital television broadcast antenna 22 and receives broadcast data of terrestrial digital television broadcast via the digital television broadcast antenna 22. Further, when the mobile phone device is turned on and in the normal mode, the digital television receiving circuit 12 always monitors whether or not an emergency warning signal is embedded in the stream of broadcast data. The normal mode will be described later. When the digital television receiving circuit 12 detects the reception of the emergency alert signal embedded in the broadcast data stream, the digital television reception circuit 12 notifies the control circuit 7 that the reception of the emergency alert signal has been detected.

  The power supply control circuit 8 controls power supply (voltage supply) to each circuit in accordance with instructions from the control circuit 7. Specifically, in accordance with an instruction from the control circuit 7, the power supply control circuit 8 receives the receiving circuit 3, the transmitting circuit 4, the transmitter / receiver duplexer 2, the display unit backlight 5, the key backlight 6, the input key 10, and the first key. The power supply (voltage supply) to the timer circuit 11, the second timer circuit 21, the digital television receiving circuit 12, the camera 13, and the control circuit 7 is controlled.

  The control circuit 7 grasps the operating state of the mobile phone device and the operating state of each component included in the mobile phone device, and controls the operating state of the mobile phone device and the operating state of each component included in the mobile phone device. . For example, the control circuit 7 controls the transmission / reception operation of the radio signal by the reception circuit 3 and the transmission circuit 4 or periodically sets the reception circuit 3 to an ON state to which a voltage is supplied to Control the operation to check the presence or absence. Further, for example, the control circuit 7 monitors an interrupt state such as a key input, a digital television broadcast reception state by the digital television reception circuit 12, a voltage supply state to each circuit by the power supply control circuit 8, and the like. In addition, the control circuit 7 instructs the power supply control circuit 8 to which circuit the voltage is supplied. Further, when the control circuit 7 instructs the first timer circuit 11 and the second timer circuit 21 to start timing and receives a notification from the first timer circuit 11 or the second timer circuit 21 that a predetermined time has elapsed, Perform processing according to the notification.

  The first timer circuit 11 is activated by the control circuit 7 after the mobile phone device receives the emergency warning signal, and measures time according to an instruction from the control circuit 7. Then, when a predetermined time has elapsed, the control circuit 7 is notified accordingly.

  The second timer circuit 21 measures time according to an instruction from the control circuit 7. Then, when a predetermined time has elapsed, the control circuit 7 is notified accordingly. The second timer circuit 21 is a timer circuit that measures the time until the brightness of the display unit backlight 5 and the key backlight 6 is reduced (or turned off) after no operation by the user is performed.

  Next, an operation mode of the mobile phone device will be described. The operation mode is an operation state of the mobile phone device that is defined such that the magnitude of current consumption of the mobile phone device changes stepwise. The normal mode is a reference operation mode among the operation states (each operation mode) in which the magnitude of the current consumption is divided in stages. Specifically, the normal mode is an operation state of the mobile phone device before receiving an emergency alert signal.

  In this embodiment, the operation mode after receiving the emergency warning signal is set to three types of emergency power saving modes 1 to 3. Based on the normal mode, the operation is restricted in the order of normal mode, emergency power saving mode 1, emergency power saving mode 2, emergency power saving mode 3, and consumed in the above order. The current is reduced. That is, the normal mode is an operation state with the largest current consumption, and the emergency power saving mode 3 is an operation state with the smallest current consumption.

  FIG. 2 is an explanatory diagram showing the operation in each operation mode. With reference to FIG. 2, the operation and control of the operation in each operation mode will be described.

  The normal mode shown in FIG. 2A is an operation mode of the mobile phone device at normal time (before receiving an emergency warning signal), and is a state where all the functions of the mobile phone device according to the present invention can be used. . In the case of the mobile phone device illustrated in FIG. 1, for example, a call origination / reception operation, an email editing / transmission / reception operation, an image capturing operation by the camera 13, and a captured image storing operation in a memory (not shown). Is possible. Further, in the normal mode, the camera 13 is activated and the antenna 1, the transmission / reception duplexer 2, the reception circuit 3, and the transmission circuit 4 communicate with another mobile phone device via the base station in the form of a video phone. An operation of receiving broadcast data of a normal terrestrial digital television broadcast by the digital television receiving circuit 12 and outputting an image or sound of the terrestrial digital television broadcast is also possible. The control circuit 7 controls the receiving circuit 3, the transmitting circuit 4, the camera 13, the digital television receiving circuit 12, and the like so that these circuits perform the above-described operations. Note that a display device that outputs an image and a sound output unit that outputs sound are not shown.

  In the normal mode, the control circuit 7 instructs the power supply control circuit 8 to turn on the display backlight 5 and the key backlight 6 when detecting an operation of the input key 10 (for example, pressing of the key) by the user. The power supply control circuit 8 supplies voltage to the display backlight 5 and the key backlight 6 in accordance with an instruction from the control circuit 7, and turns on the display backlight 5 and the key backlight 6. As a result, it becomes easier for the user to see the display and keys on the display device.

  Further, in the normal mode, the control circuit 7 instructs the second timer circuit 21 to start measuring a certain time when the operation of the input key 10 by the user (for example, pressing of the key) is not detected. The second timer circuit 21 measures the instructed time and notifies the control circuit 7 when the time has elapsed. Upon receiving this notification, the control circuit 7 instructs the power supply control circuit 8 to reduce the brightness of the display backlight 5 and the key backlight 6. In response to an instruction from the control circuit 7, the power supply control circuit 8 reduces the amount of voltage supplied to the display backlight 5 and the key backlight 6 and reduces the brightness of the display backlight 5 and the key backlight 6. In the normal mode, the control circuit 7 may instruct the power supply control circuit 8 to turn off the display backlight 5 and the key backlight 6 in response to the notification from the second timer circuit 21. In this case, the power supply control circuit 8 stops the voltage supply to the display backlight 5 and the key backlight 6 in accordance with an instruction from the control circuit 7 and turns off the display backlight 5 and the key backlight 6.

  Further, in the normal mode, the control circuit 7 controls the power supply so that the main circuit (that is, the receiving circuit 3) that performs incoming call processing is turned off and intermittently turned on in the incoming call waiting state. Instruct the circuit 8. In response to this instruction, the power supply control circuit 8 stops the voltage supply to the reception circuit 3, supplies the voltage to the reception circuit 3 intermittently (at regular intervals), and turns on the reception circuit 3. To do. When the voltage is supplied and the receiving circuit 3 is turned on, the receiving circuit 3 confirms whether there is an incoming call addressed to its own device (mobile phone device). Note that the voltage supply interval (cycle) to the receiving circuit 3 in the normal mode is, for example, 2.56 seconds. In this case, the receiving circuit 3 is turned on when a voltage is supplied every 2.56 seconds, and checks whether there is an incoming call addressed to itself.

  The emergency power saving mode 1 shown in FIG. 2B is a state in which a function for making and receiving calls, an e-mail editing and sending / receiving function, and other functions can be used. In the emergency power saving mode 1, at least the function for making and receiving calls and the function for editing and sending / receiving e-mails can be used, as long as other functions can also be used. And what kind of function the above-mentioned “other functions” is not particularly limited. For example, a shooting function by the camera 13 may be usable in addition to a function for making and receiving calls and an e-mail editing and sending / receiving function. Further, for example, a videophone function may be usable in addition to a function for making and receiving calls and an email editing and sending / receiving function. Further, for example, in addition to a function for making and receiving calls and an e-mail editing and transmission / reception function, a reception function for terrestrial digital television broadcasting may be usable.

  The control circuit 7 switches from the normal mode to the emergency power saving mode 1 when a notification that the emergency alarm signal has been received is sent from the digital television receiving circuit 12. At this time, the circuit corresponding to the function that cannot be used in the emergency power saving mode 1 is turned off. For example, in the emergency power saving mode 1, it is assumed that the reception function of digital terrestrial television broadcasting cannot be used. In this case, the control unit 7 instructs the power supply control circuit 8 to turn off the circuit corresponding to the reception function of the terrestrial digital television broadcast (that is, the digital television reception circuit 12). In response to this instruction, the power supply control circuit 8 stops the voltage supply to the digital television receiving circuit 12 and turns off the digital television receiving circuit 12.

  However, it is assumed that one circuit corresponds to a plurality of functions, and corresponds to a function that can be used in emergency power saving mode 1 and a function that cannot be used in emergency power saving mode 1. . In that case, the control circuit 7 keeps the circuit on. For example, in the emergency power saving mode 1, it is assumed that the photographing function by the camera 13 can be used, but the videophone function cannot be used. In this case, the camera 13 corresponds to a videophone function that cannot be used, but also corresponds to a usable shooting function. Therefore, the control circuit 7 causes the power supply control circuit 8 to maintain the voltage supply to the camera 13 and keep the camera 13 on.

  In the emergency power saving mode 1, when the control circuit 7 detects an operation of the input key 10 by the user (for example, pressing of the key), the control backlight 7 turns on the display backlight 5 and the key backlight 6. Instruct. However, in the emergency power saving mode 1, the brightness of the display backlight 5 and the key backlight 6 when the user operates the input key 10 is determined so that the user turns on the display backlight 5 and the key backlight 6. Reduce the brightness to a level that can be confirmed at a minimum. Therefore, in the emergency power saving mode 1, the power supply control circuit 8 is lower than the normal mode for the display backlight 5 and the key backlight 6 even when receiving an instruction to turn on each backlight from the control circuit 7. A voltage (a voltage for lighting each backlight to such an extent that the user can at least confirm the lighting of the display backlight 5 and the key backlight 6) is supplied.

  Further, in the emergency power saving mode 1, the control circuit 7 instructs the second timer circuit 21 to start measuring a certain time when the operation of the input key 10 by the user (for example, pressing of the key) is not detected. . The second timer circuit 21 measures the instructed time and notifies the control circuit 7 when the time has elapsed. Upon receiving this notification, the control circuit 7 instructs the power supply control circuit 8 to turn off the display backlight 5 and the key backlight 6. In response to an instruction from the control circuit 7, the power supply control circuit 8 stops the voltage supply to the display backlight 5 and the key backlight 6 and turns off the display backlight 5 and the key backlight 6.

  Here, the case where the display backlight 5 and the key backlight 6 are turned on with low luminance when the user operates the input key 10 has been described. In the emergency power saving mode 1, the display backlight 5 and the key backlight 6 may be turned off when the user operates the input key 10. In this case, even when the control circuit 7 detects the operation of the input key 10 by the user (for example, pressing of the key), the control circuit 7 keeps the display backlight 5 and the key backlight 6 off. The control circuit 8 is instructed. In response to this instruction, the power supply control circuit 8 keeps power supply to the display backlight 5 and the key backlight 6 stopped.

  Also in the emergency power saving mode 1, the control circuit 7 keeps the main circuit (that is, the receiving circuit 3) that performs incoming call processing in the OFF state when in the incoming call waiting state, and intermittently (at regular intervals). ) To instruct the power supply control circuit 8 to turn on. In response to this instruction, the power supply control circuit 8 stops supplying voltage to the receiving circuit 3, supplies voltage to the receiving circuit 3 at regular intervals, and turns on the receiving circuit 3. When the voltage is supplied and the receiving circuit 3 is turned on, the receiving circuit 3 confirms whether there is an incoming call addressed to its own device (mobile phone device). However, in the emergency power saving mode 1, the control circuit 7 makes the interval for turning on the receiving circuit 3 longer than in the normal mode. For example, in the normal mode, it is assumed that the interval (cycle) at which the voltage is supplied to the receiving circuit 3 to turn on the receiving circuit 3 is 2.56 seconds. In this case, in the emergency power saving mode 1, the period for supplying the voltage to the receiving circuit 3 to turn on the receiving circuit 3 is longer than that in the normal mode, for example, 7.68 seconds, which is three times 2.56 seconds. To do.

  The emergency power saving mode 2 shown in FIG. 2 (c) is a state in which only the function for making and receiving calls and the function for editing and sending / receiving e-mail can be used. For example, in the case of the cellular phone device illustrated in FIG. 1, in the emergency power saving mode 2, the photographing function by the camera 13, the videophone function, and the digital terrestrial television broadcast reception function are disabled. Therefore, the control circuit 7 instructs the power supply control circuit 8 to turn off the camera 13 and the digital television receiving circuit 12. The power supply control circuit 8 stops the voltage supply to the camera 13 and the digital television receiving circuit 12 and turns off the camera 13 and the digital television receiving circuit 12. The reception circuit 3, the transmission circuit 4, and the transmission / reception duplexer 2 are circuits corresponding to the videophone function, but the function of making and receiving calls and the function of sending and receiving e-mails that can be used in the emergency power saving mode 2 are provided. Therefore, the reception circuit 3, the transmission circuit 4, and the transmission / reception duplexer 2 are not always turned off.

  The control of the receiving circuit 3 in the emergency power saving mode 2 in the incoming call waiting state is the same as in the emergency power saving mode 1. That is, the control circuit 7 instructs the power supply control circuit 8 to turn off the receiving circuit 3 that performs incoming call processing in an incoming call waiting state and to turn it on intermittently (at regular intervals). To do. The operation of the power supply control circuit 8 receiving this instruction is the same as in the emergency power saving mode 1. Moreover, it is the same as that of the emergency power saving mode 1 in that the interval (cycle) for supplying the voltage to the receiving circuit 3 and turning on the receiving circuit 3 is longer than that in the normal mode. When the voltage is supplied and the receiving circuit 3 is turned on, the receiving circuit 3 confirms whether there is an incoming call addressed to its own device (mobile phone device).

  Control of the display unit backlight 5 and the key backlight 6 in the emergency power saving mode 2 is the same as that in the emergency power saving mode 1.

  The control circuit 7 switches from the emergency power saving mode 1 to the emergency power saving mode 2 when a predetermined time has elapsed after switching from the normal mode to the emergency power saving mode 1.

  In the emergency power saving mode 3 shown in FIG. 2D, the entire mobile phone device including the communication unit (transmitter / receiver duplexer 2, transmitter circuit 4, receiver circuit 3) is turned off (in other words, all In this state, the voltage supply to this circuit is stopped) so as not to receive an incoming call addressed to its own device (mobile phone device). However, in the emergency power saving mode 3, when the power of the mobile phone device is turned on by the user, the control circuit 7 and the power supply control circuit 8 perform control so that only the call transmission function can be used. Therefore, unlike the other modes, the emergency power saving mode 3 does not perform control for supplying a voltage to the receiving circuit 3 at a constant time period and checking whether there is an incoming call to the own device. In the emergency power saving mode 3, the editing and transmission / reception functions of electronic mail are disabled.

  When the power of the mobile phone device is turned on by the user and the mobile phone device is talking to the other party's phone or at the end of the call, if the remaining battery level cannot be secured, the power control circuit 8 The voltage supply to each circuit of the device is stopped, and the mobile phone device is turned off (power is cut off). In this case, the mobile phone device cannot be used unless the battery 9 is charged.

  If the remaining battery level still remains after the call ends, the next call can be made. However, at this time, when the transmission operation by the input key 10 is not performed for a predetermined time, the control circuit 7 instructs the power supply control circuit 8 to stop the voltage supply to all the circuits. In accordance with this instruction, the power supply control circuit 8 stops the voltage supply to all the circuits of the mobile phone device. As a result, the mobile phone device is turned off (power is cut off). The same applies to the case where the call operation by the input key 10 is not performed for a predetermined time even though the power of the mobile phone device is turned on by the user.

  In the emergency power saving mode 3, control is performed so as to prohibit the lighting of the display unit backlight 5 and the key backlight 6. That is, the control circuit 7 instructs the power supply control circuit 8 to turn off the display unit backlight 5 and the key backlight 6. In accordance with this instruction, the power supply control circuit 8 does not supply power to the display unit backlight 5 and the key backlight 6, and maintains the display unit backlight 5 and the key backlight 6 in an extinguished state.

  The control circuit 7 switches from the emergency power saving mode 1 to the emergency power saving mode 2 and then switches from the emergency power saving mode 2 to the emergency power saving mode 3 after a predetermined time has elapsed.

Next, the operation will be described.
3 and 4 are flowcharts showing an example of processing progress of the cellular phone device according to the present embodiment. Assume that the mobile phone device is in the normal mode. At this time, the control circuit 7 instructs the power supply control circuit 8 to supply a voltage to the digital television receiving circuit 12, and the power supply control circuit 8 supplies a voltage to the digital television receiving circuit 12. The digital television receiving circuit 12 always monitors whether or not an emergency warning signal is embedded in the broadcast data stream (step S1). When the reception of the emergency warning signal is not detected (No in step S1), the digital television receiving circuit 12 continues the monitoring process.

  When the digital television receiving circuit 12 detects the reception of the emergency warning signal (Yes in step S1), it notifies the control circuit 7 that the reception of the emergency warning signal has been detected. Upon receiving this notification, the control circuit 7 starts the first timer circuit 11 and causes the first timer circuit 11 to start measuring a predetermined time (for example, 30 minutes) (step S2).

  Subsequently, the control circuit 7 controls the mobile phone device to switch from the normal mode to the emergency power saving mode 1 (step S3). That is, the control circuit 7 instructs the power supply control circuit 8 to turn off the circuit corresponding to the function that cannot be used in the emergency power saving mode 1. In response to this instruction, the power supply control circuit 8 stops the voltage supply to the circuit.

  In step S3, as already described, the control circuit 7 controls the display backlight 5 and the key backlight 6 to be lit at a low luminance when the user operates the input key 10. Alternatively, the display backlight 5 and the key backlight 6 may be controlled to be turned off when the user operates the input key 10.

  Further, in step S3, as already described, the control circuit 7 controls the period in which the voltage is supplied to the receiving circuit 3 and turned on in the incoming call waiting state to be longer than that in the normal mode.

  The first timer circuit 11 measures time and determines whether or not a predetermined time (for example, 30 minutes) has elapsed since the time measurement was started in step S2 (step S4). If the predetermined time has not elapsed (No in step S4), the time measurement is continued.

  If the predetermined time has elapsed (Yes in step S4), the first timer circuit 11 notifies the control circuit 7 that the predetermined time has elapsed and stops timing. Upon receiving this notification, the control circuit 7 activates the first timer circuit 11 again, and causes the first timer circuit 11 to start measuring a predetermined time (for example, 30 minutes) (step S5).

  Subsequently, the control circuit 7 controls the mobile phone device to switch from the emergency power saving mode 1 to the emergency power saving mode 2 (step S6). That is, control is performed so that only the function for making and receiving calls and the function for editing and sending / receiving e-mail can be used. In the case of the cellular phone device illustrated in FIG. 1, the control circuit 7 turns off the camera 13 and the digital TV receiving circuit 12 in order to disable the photographing function, the videophone function, and the digital terrestrial television broadcast receiving function. The power supply control circuit 8 is instructed to The power supply control circuit 8 stops the voltage supply to the camera 13 and the digital television receiving circuit 12 in response to this instruction.

  The control of the display backlight 5 and the key backlight 6 in step S6 is the same as the control of the display backlight 5 and the key backlight 6 in step S3. Further, in the incoming call waiting state, it is the same as step S3 in that the period for supplying voltage to the receiving circuit 3 and turning it on is longer than that in the normal mode.

  The first timer circuit 11 measures time, and determines whether or not a predetermined time (for example, 30 minutes) has elapsed since the time measurement was started in step S5 (step S7). If the predetermined time has not elapsed (No in step S7), the time measurement is continued.

  When the predetermined time has elapsed (Yes in step S7), the first timer circuit 11 notifies the control circuit 7 that the predetermined time has elapsed and stops timing. Upon receiving this notification, the control circuit 7 instructs the power supply control circuit 8 to stop the voltage supply to the reception circuit 3, and the power supply control circuit 8 stops the voltage supply to the reception circuit 3 in accordance with this instruction (step). S8).

  Subsequently, the control circuit 7 determines whether or not there is an operation being processed (for example, editing or transmission of an e-mail). If there is an operation in process (No in step S9), the control circuit 7 controls the process until the process is completed. If there is no operation being processed, or if the operation being processed has been completed (Yes in step S9), the control circuit 7 turns off the power supply of the entire mobile phone device (voltages for all circuits). Instruct the power supply control circuit 8 to stop the supply). In accordance with this instruction, the power supply control circuit 8 stops the voltage supply to all the circuits and turns off the cellular phone device (step S10). Then, the mobile phone device remains off until the user performs an operation to turn on the power in step S11 shown in FIG.

  After step S10, when the user performs an operation to turn on the power (step S11), the power supply control circuit 8 determines whether or not the remaining amount of the battery 9 is exhausted (step S12). If there is no remaining battery 9 (Yes in step S12), the power supply control circuit 8 does not supply voltage to each circuit (step S21) and ends the operation as it is. In this case, the mobile phone device cannot be used unless charging is performed.

  If the remaining amount of the battery 9 remains (No in step S12), the power supply control circuit 8 supplies a voltage to the control circuit 7. Then, the control circuit 7 turns off the receiving circuit 3, the digital television receiving circuit 12, the camera 13, the second timer circuit 21, the display backlight 5 and the key backlight 6, and other circuits (the transmitting circuit 4, the transmission / reception portion). The power supply control circuit 8 is instructed to turn on the wave generator 2, the input key 10, and the first timer circuit 11). The power supply control circuit 8 supplies a voltage to the receiving circuit 3, the digital television receiving circuit 12, the camera 13, the second timer circuit 21, the display unit backlight 5 and the key backlight 6 in accordance with an instruction from the control circuit 7. Instead, a voltage is supplied to the transmission circuit 4, the transmission / reception duplexer 2, the input key 10, and the first timer circuit 11 (step S13). As a result, the receiving circuit 3 is turned off and the transmitting circuit 4 is turned on, so that only a call can be made without receiving an incoming call.

  Subsequent to step S13, the control circuit 7 starts the first timer circuit 11 and causes the first timer circuit 11 to start measuring a predetermined time (step S14). The predetermined time instructed by the control circuit 7 to the first timer circuit 11 in step S14 is when the user does not perform a call outgoing operation within that time (in other words, when a call outgoing command is not input). D) It is time to turn off the mobile phone device again. The predetermined time that the control circuit 7 instructs the first timer circuit 11 in step S14 is, for example, 1 minute.

  The control circuit 7 causes the first timer circuit 11 to start measuring a predetermined time (for example, 1 minute) and then detects whether or not an input of a call outgoing command has been detected (that is, the user performs a call outgoing operation). (Step S15). When the control circuit 7 detects the input of the transmission command (Yes in step S15), the control circuit 7 instructs the first timer circuit 12 to stop timing, and the first timer circuit 11 stops timing (step S18).

  Further, the first timer circuit 11 continues the time measurement unless receiving a time stop instruction from the control circuit 7, and determines whether or not a predetermined time (for example, 1 minute) has elapsed since the time measurement was started in step S14. Determination is made (step S16).

  If the predetermined time has not elapsed (No in step S16), the first timer circuit 11 continues to count time. When the predetermined time has elapsed (Yes in step S16), the first timer circuit 11 notifies the control circuit 7 that the predetermined time has elapsed and stops timing. Upon receiving this notification, the control circuit 7 instructs the power supply control circuit 8 to turn off the power supply of the entire mobile phone device (stop the voltage supply to all the circuits). In accordance with this instruction, the power supply control circuit 8 stops the voltage supply to all the circuits and turns off the cellular phone device (step S17). Then, the mobile phone device remains off until the user performs an operation to turn on the power in step S11.

  Therefore, when the control circuit 7 does not detect the input of the transmission command until the predetermined time elapses (No in step S15, Yes in step S16), the mobile phone device is turned off. On the other hand, when the control circuit 7 detects the input of the transmission command before the predetermined time elapses (No in step S16, Yes in step S15), the control circuit 7 causes the first timer circuit 11 to stop timing (step S18). The process proceeds to step S19.

  In step S19, the control circuit 7 instructs the power supply control circuit 8 to turn on the receiving circuit 3. The power supply control circuit 8 supplies a voltage to the receiving circuit 3 in accordance with an instruction from the control circuit 7. Further, the control circuit 7 causes the transmission circuit 4 to transmit a calling signal so that a telephone call can be made with the other party's telephone via the base station. As a result, it becomes possible to make a call with the other party's telephone (step S19). In step S19, since a voltage is supplied to the receiving circuit 3, both transmission and reception are possible.

  During the call and after the call ends, the control unit 7 causes the electronic control circuit 8 to monitor whether or not the remaining amount of the battery 9 is exhausted (step S20).

  When it is determined that the remaining battery power is exhausted during a call, the power supply control circuit 8 stops the voltage supply to each circuit included in the mobile phone device and turns off the mobile phone device (step S21). Similarly, when it is determined that the remaining battery level is exhausted after the call is completed, the power supply control circuit 8 turns off the mobile phone device (step S21).

  If it is determined that the remaining battery level still remains after the call is finished, the control unit 7 proceeds to step S14 and performs the operation after step S14 again.

  In the present embodiment, the emergency warning signal detecting means is realized by the digital television receiving circuit 12. The voltage supply control means is realized by the power supply control circuit 8. The control means is realized by the control circuit 7. The transmission means is realized by the transmission circuit 4. The receiving means is realized by the receiving circuit 3. The user instruction input means is realized by the input key 10. The display unit is realized by a display device (not shown).

  According to the present invention, when an emergency occurs and the digital television receiver circuit 12 receives an emergency warning signal, the control circuit 7 sets the mobile phone device to the emergency power saving mode 1 that consumes less current than the normal mode, and As time passes, the power consumption mode is changed step by step to the emergency power saving modes 2 and 3 with less current consumption. Therefore, it is possible to ensure a battery remaining amount and to make a call more reliably even in an emergency.

  Further, in the emergency power saving mode 3, even when the user performs an operation to turn on the mobile phone device with the mobile phone device turned off, the mobile phone can be used as long as there is no input of an outgoing call command within a predetermined time. Turn off the device. Therefore, it is easy to secure the remaining amount of the battery, and even when congestion or the like recovers after the congestion or the like continues for a long time in an emergency situation, the mobile phone device can make a call from the user himself / herself.

  In addition, the operation mode is changed stepwise in the order of normal mode, emergency power saving mode 1, emergency power saving mode 2, emergency power saving mode 3, and the functions that are less important in an emergency are not used in order. Current consumption is reduced as possible. Therefore, it is possible to use a certain function at the beginning of receiving an emergency warning signal, and to maintain the function of calling from the most important person in the event of an emergency for the longest time.

  In the emergency power saving mode 1 and the emergency power saving mode 2, the period for checking whether there is an incoming call addressed to the own apparatus by turning on the receiving circuit 3 is longer than that in the normal mode. Therefore, it is possible to realize a state where incoming calls can be accepted while suppressing current consumption.

  Further, in the emergency power saving mode 1 and the emergency power saving mode 2, when the user operates the input key 10, the brightness of the display backlight 5 and the key backlight 6 is reduced or turned off as compared with the normal mode. Let Therefore, even when the user is editing the mail by key operation or when the outgoing operation is continuously performed at the time of congestion, it is possible to suppress the consumption of the battery 9 more than usual.

  In the above description, three types of emergency power saving modes are defined, and the current consumption is reduced step by step in three steps. The emergency power saving mode is not limited to three types, and for example, two types or four or more types may be defined to reduce the current consumption step by step.

  In the above description, the emergency power saving mode 1 is changed to the emergency power saving mode 2 and the emergency power saving mode 2 is changed to the emergency power saving mode 3 as the predetermined time elapses. Thus, instead of changing the emergency power saving mode over time, the voltage value indicating the remaining battery level is held (stored) stepwise as a threshold value, and the voltage value indicating the remaining battery level is changed according to the change in the voltage value indicating the remaining battery level. The emergency power saving mode may be changed. In this case, the cellular phone device only needs to include a voltage value detection circuit (not shown) that detects a voltage value indicating the remaining amount of the battery 9. Then, the control circuit 7 compares the voltage value detected by the voltage value detection circuit (not shown) with a threshold value determined in stages, and when the voltage value becomes lower than the threshold value, the emergency saving is performed. What is necessary is just to change an electric power mode. In this way, in the event of an emergency, the function for making and receiving calls, the function for editing and sending and receiving e-mails, and other functions can be used first, and when the voltage decreases, the function for making and receiving calls and electronic Only the mail editing and transmission / reception functions can be used, and when the voltage value further decreases, the cellular phone device can be turned off. For example, a voltage value indicating that the battery 9 has a remaining amount that can make a call for a predetermined time may be used as the threshold value of the voltage value when the mobile phone device is turned off. For example, a voltage value indicating that the remaining battery capacity is sufficient to make a call for about 10 minutes may be set as a threshold value when the mobile phone device is turned off. In this case, the battery 9 of the cellular phone device that has been turned off has a remaining battery charge sufficient for a call of about 10 minutes. Then, the user can turn on the mobile phone device and perform the minimum necessary call. In this case as well, it is possible to maintain the function of calling from the most important person for the longest time in an emergency while enabling a certain degree of function at the time of receiving the emergency warning signal.

  Further, in the above description, the case where the mobile phone device detects an emergency warning signal in the broadcast data of the terrestrial digital television broadcast and shifts to the emergency power saving mode has been shown. An emergency warning signal included in broadcast data of other types of broadcasts may be detected and the emergency power saving mode 1 may be entered. For example, an emergency warning signal transmitted by analog television broadcasting, analog radio broadcasting, or BS digital broadcasting may be detected to shift to the emergency power saving mode. In this case, the mobile phone device includes a receiving circuit that constantly analyzes the presence or absence of an emergency alert signal transmitted in any of the above-mentioned broadcasts when the mobile phone device is turned on and in the normal mode. Just do it. Then, when the receiving circuit detects the reception of the emergency warning signal, the control circuit 7 may be notified accordingly.

  The present invention is applicable to a mobile phone.

It is a block diagram which shows one Embodiment of the mobile telephone apparatus by this invention. It is explanatory drawing which shows the operation | movement in each operation mode. It is a flowchart which shows the example of process progress of the mobile telephone apparatus of this Embodiment. It is a flowchart which shows the example of process progress of the mobile telephone apparatus of this Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Base station antenna 2 Transmission / reception duplexer 3 Reception circuit 4 Transmission circuit 5 Display part backlight 6 Key backlight 7 Control circuit 8 Power supply control circuit 9 Battery 10 Input key 11 1st timer circuit 12 Digital television reception circuit 13 Camera 21 Second timer circuit

Claims (5)

A mobile phone device capable of receiving broadcast data,
A digital television broadcast receiving circuit that receives broadcast data and detects an emergency warning signal included in the broadcast data;
A camera for taking images,
A transmission circuit for transmitting a radio signal to the base station;
A receiving circuit for receiving a radio signal from the base station;
An input key for inputting an instruction from the user;
A power supply for supplying voltage;
Voltage supply control means for controlling supply of voltage to the digital television broadcast receiving circuit, the camera, the transmitting circuit, the receiving circuit, and the input key;
The digital television broadcast receiving circuit, the camera, the transmission circuit, the receiving circuit, and a control means for instructing the voltage supply control means to supply voltage to the input key or to stop voltage supply,
After the emergency warning signal is detected by the digital television broadcast receiving circuit, the control means repeatedly reduces the number of voltage supply objects to the voltage supply control means, gradually decreases the number of voltage supply objects, in the process of repeating the reducing the number of supply target, to the voltage supply control means to stop the voltage supply to the digital television broadcast receiver circuit and the camera, and the voltage supply to the transmitting circuit and the input keys And a voltage is periodically supplied to the receiving circuit when in an incoming call waiting state. Control means, the voltage supply control unit, the voltage supply to the digital television broadcast receiver circuit and the camera is stopped, and to perform the voltage supply to the transmitting circuit and the input keys, and received when the incoming call waiting state Instructing the voltage supply control means to turn off the power of the mobile phone device when a predetermined period has passed since the voltage was periodically supplied to the circuit.
The voltage supply control means turns off the power of the mobile phone device according to the instruction of the control means
The control means, when an instruction to turn on the power of the mobile phone device is input by an input key after the power supply of the mobile phone device is turned off by the voltage supply control means, When the voltage supply to the digital television broadcast receiving circuit, the camera and the receiving circuit is stopped, the voltage is supplied to the transmitting circuit and the input key, and when a transmission instruction is input by the input key, The mobile phone device according to claim 1, wherein only a call from the mobile phone device and a call after the call can be made by causing the voltage supply control means to supply power to the receiving circuit. The control means causes the voltage supply control means to periodically supply a voltage to the receiving circuit when waiting for an incoming call even before the emergency warning signal is detected, and after receiving an emergency warning signal, receiving when the incoming call is waiting. The mobile phone device according to claim 1 or 2, wherein a power supply period to the circuit is made longer than that before the emergency warning signal is detected. A key backlight to light the input key,
A display for displaying an image;
A display unit backlight that is a backlight of the display unit,
The control means
Before the emergency warning signal is detected, when the instruction input from the user to the input key is detected, the voltage supply control means performs voltage supply to the key backlight and the display unit backlight, and When a predetermined time has elapsed since the detection of the instruction input from the user has been lost, the voltage supply control means is configured to lower the supply voltage to the key backlight and the display unit backlight from before the predetermined time has elapsed, or Stop the voltage supply to the key backlight and display backlight,
After the emergency warning signal is detected, when the instruction input from the user to the input key is detected, the key supply backlight and the display unit backlight before the predetermined time elapses before the emergency warning signal detection is detected in the voltage supply control means. When a voltage lower than the supply voltage is supplied to the key backlight and the display unit backlight, and when the predetermined time elapses after detection of an instruction input from the user to the input key is lost, the key backlight and the display are displayed. Stop the voltage supply to the backlight,
When the voltage supply control means stops the voltage supply to the digital television broadcast receiving circuit, the camera, and the receiving circuit after the emergency warning signal is detected, the voltage supply to the key backlight and the display unit backlight is performed. Also stop
The mobile phone device according to claim 2 . A key backlight to light the input key,
A display for displaying an image;
A display unit backlight that is a backlight of the display unit,
The control means
Before the emergency warning signal is detected, when the instruction input from the user to the input key is detected, the voltage supply control means performs voltage supply to the key backlight and the display unit backlight, and When a predetermined time has elapsed since the detection of the instruction input from the user has been lost, the voltage supply control means is configured to lower the supply voltage to the key backlight and the display unit backlight from before the predetermined time has elapsed, or Stop the voltage supply to the key backlight and display backlight,
The voltage supply control means stops the voltage supply to the key backlight and the display unit backlight even when the instruction input from the user to the input key is detected after the emergency warning signal is detected. The mobile phone device according to claim 3.

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