JP2005303790A - Mobile communications terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mobile communications terminal, capable of referring to a telephone directory and originating an emergency call, in response to user operation if a telephone directory function and the emergency call are required, when a battery voltage becomes a predetermined voltage or lower. <P>SOLUTION: In a mobile communications terminal including hardware components, such as a radio unit, a display unit and a transceiver unit, a power unit for supplying power to the hardware components and a battery voltage monitoring means for monitoring a battery voltage, the mobile communications terminal comprises a control unit which turns off power supply to the hardware components, related to providing functions, such as a communication function or an optional function so as to stop the function, if it is detected that the battery voltage becomes a predetermined voltage, and which turns on the power supply to the hardware components related to a telephone directory function and an emergency call function, in response to a key input which instructs start of the telephone directory function and a key input which instructs emergency calls. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a mobile communication terminal such as a mobile phone terminal, a PHS, or a portable information terminal, and more particularly to this mobile communication terminal device that can make a telephone book reference or make an emergency call even when a battery voltage drops below a predetermined voltage.

  Since the mobile phone operates by receiving power from the built-in battery, power supply is stopped when the battery becomes lower than a predetermined voltage due to battery exhaustion, and the mobile phone does not operate. In addition to communication functions such as a call function and a data communication function, all functions of various service functions that enhance convenience are stopped along with the stop of power supply.

  In a normal mobile phone, when a function related to communication such as a call or data communication which is an essential function is operated, the power is turned off when the battery voltage is low enough to guarantee the function and the power consumption is large. If the battery runs out and recharges it, the mobile phone will work, but it is not easy if you have a mobile phone and go out.

  The following problems occur when the mobile phone cannot be used when going out. In other words, not only can you make outgoing calls from your own mobile phone, but you can also use your mobile phone's phone book function as a substitute for your personal phone number and other handbooks. I can't know my phone number even if I want to. There is an increasing tendency to replace the notebooks, phone books, address books, etc., which have been prepared individually by each person with the phone book function of the mobile phone.

  In addition, when the battery becomes lower than a predetermined voltage and the power is turned off, it becomes impossible to make an emergency call to the police station or the fire station.

  As a countermeasure to the former problem, Japanese Patent Application Laid-Open No. 2002-325132 (Patent Document 1) sets a power saving phone book mode when the battery voltage becomes a predetermined voltage or lower when using the phone book function of a mobile phone. A mobile phone that can be controlled to stop functions other than those necessary for displaying the phone book on the display and can refer to the phone book is disclosed. According to the publication, when the battery voltage falls below a predetermined voltage, power is supplied only to the phone book display means and the liquid crystal display means in the power saving mode so that the phone book function can be used continuously. ing.

  On the other hand, with respect to the latter problem, Japanese Patent Laid-Open No. 2001-352372 (Patent Document 2) discloses that if the battery becomes a predetermined voltage or lower during a call and the call is an emergency call, A mobile communication terminal configured to continue a call is disclosed.

JP 2002-325132 A JP 2001-352372 A

  However, in the mobile phone disclosed in Patent Document 1, the power supply for maintaining the phone book mode is continued for the phone book function even when the battery voltage falls below a predetermined voltage.

  On the other hand, in the mobile communication terminal disclosed in Patent Document 2, when the battery voltage drops below a predetermined value during a call in an emergency call, the call is continued, but after the battery voltage drops below a predetermined voltage value. It is not intended to make a new emergency call.

  An object of the present invention is to stop power supply for all functions when the battery voltage becomes a predetermined voltage or less to suppress battery consumption, and is necessary by a user operation when a telephone directory function and an emergency call are required. It is an object of the present invention to provide a mobile communication terminal capable of referring to a telephone directory and making an emergency call by activating a function.

  According to the present invention, mobile communication including hardware components such as a radio unit, a display unit, a transmission / reception unit, a power supply unit that supplies power to the hardware component, and a battery voltage monitoring unit that monitors the battery voltage. When the terminal detects that the battery voltage reaches the specified voltage, it turns off the power supply to hardware components related to the provision of functions such as communication functions and additional functions, stops the function, and instructs the activation of the phone book function A mobile communication terminal including a control unit that turns on the power supply to the hardware component related to the telephone directory function in response to the input is obtained.

  According to the present invention, the mobile unit further includes a hardware component such as a radio unit, a display unit, a transmission / reception unit, a power supply unit that supplies power to the hardware component, and a battery voltage monitoring unit that monitors the battery voltage. When the battery terminal detects that the battery voltage reaches the specified voltage, it turns off the power supply to the hardware components related to the provision of functions such as communication functions and additional functions, stops the function, and instructs the emergency call to start. A mobile communication terminal is obtained that includes a control unit that turns on the power supply to the hardware component related to the transmission of the emergency call in response to the input.

  Further, according to the present invention, the mobile unit includes a hardware component such as a radio unit, a display unit, a transmission / reception unit, a power supply unit that supplies power to the hardware component, and a battery voltage monitoring unit that monitors the battery voltage. When the battery terminal detects that the battery voltage reaches a predetermined voltage, it turns off the power supply to the hardware components related to the provision of functions such as communication functions and additional functions, stops the function, and instructs the activation of the phone book function A mobile communication terminal including a control unit that turns on the power supply to the hardware components related to the telephone directory function and the emergency call function in response to the key input indicating the key input and the emergency call is obtained.

  The present invention can refer to the telephone directory function of the mobile communication terminal even when the normal communication function is stopped when the battery voltage of the mobile communication terminal drops below a predetermined voltage level.

  Further, according to the present invention, even when the battery voltage of the mobile communication terminal falls below a predetermined voltage level, a new emergency call can be transmitted to make a call.

  The embodiment of the present invention stops the power supply related to all functions when the battery voltage becomes a predetermined voltage or less, and activates necessary functions by user operation when a telephone directory function and an emergency call are required. Since the phone book can be referred to and an emergency call can be made, battery consumption can be reduced accordingly.

  Next, the present invention will be described with reference to the drawings.

  FIG. 1 is a block diagram showing a mobile communication terminal apparatus according to an embodiment of the present invention. In the figure, a mobile communication terminal device transmits a radio frequency signal to a mobile communication base station via an antenna (not shown) and receives a radio frequency signal from the base station, and various signals. A baseband signal processing unit 12 for processing, a transmission / reception unit 13 for inputting and outputting voice, a key input unit 14 for operating and inputting instructions by a user, a display unit 15 for displaying input / output information, and a main unit for controlling these A control unit 20 is included. The mobile communication terminal device further detects and monitors a power supply unit 17 including a battery 18 serving as an energy source and a power supply control unit 16 that controls supply of power to components of the terminal device, and a degree of battery consumption. A battery voltage monitoring detection unit 19 is included.

  The radio unit 11 includes a reception unit and a transmission unit. The reception unit amplifies and demodulates the radio frequency signal received from the antenna. Prior to demodulation, the radio frequency signal is down-converted by the local signal. The transmission unit modulates an information signal and a control signal to be transmitted to the base station, amplifies the power, and radiates it from the antenna to the air.

  The transmitter / receiver unit 13 includes a microphone that converts voice into an electrical signal and a receiver that converts a voice signal from the other party into voice. A speaker unit (not shown) generates an alarm sound when receiving an incoming call or warning.

  The key input unit 14 includes various keys such as a power key, a dial key such as numbers / characters, a call / end key, a menu key, a cursor key, and a confirmation key, and a user inputs information via these keys.

  The display unit 15 includes a liquid crystal panel, a drive control circuit thereof, and a backlight that is a light source for irradiating the liquid crystal panel. Then, corresponding information is displayed on the screen in accordance with the input from the key input unit.

  The main control unit 20 includes a ROM 22 that stores a processing program and setting information, a RAM 23 that is used as a work area in executing the processing program, and a CPU that executes the processing program. The main control unit 20 receives inputs from the key input unit and signals from the radio unit, baseband processing unit, etc., according to the processing program, the radio unit 11, the baseband processing unit 12, the transmission / reception unit 13, the display unit 15, etc. The communication function and the additional function of the mobile communication terminal device are executed through the above control and these controls.

  The energy of the battery 18 is transmitted via the power supply control unit 16 to the wireless unit 11, the baseband signal processing unit 12, the transmission / reception unit 13, the key input unit 14, the display unit 15, the speaker unit. Supplied to the main control unit 20 and the like. The power supply control unit includes a plurality of wires for supplying power to each of the hardware components of the mobile communication terminal device. The power supply control unit 16 includes a switch for supplying or stopping power supplied to the hardware component, and operates based on the control of the main control unit.

  The battery voltage monitoring detector 19 monitors the voltage of the battery 19 and interrupts the main controller when the voltage drops below a predetermined voltage.

  The main control unit 20 controls the power supply control unit 16 to turn on / off the power supply to the hardware components when the battery voltage monitoring / detecting unit is below a predetermined voltage.

  FIG. 2 is a state transition diagram of the mobile communication terminal. Referring to the figure, in the power supply (power switch) off state (S1) of the mobile communication terminal, the power supply to the hardware including the CPU is cut off. When the power key is turned on, the mobile communication terminal captures the outgoing control line based on the empty outgoing control line information in the incoming control line from the radio base station, performs the location registration procedure, and transitions to the standby state (S2). . A call state (S3) is established by making or receiving a call in the standby state, and transitions to a standby state (S2) when the call ends. When the battery voltage falls below a predetermined voltage level in the standby state, the state transits to the low voltage state 1 (S4). When the voltage drops below a predetermined voltage level in the call state (S3), the state transitions to the standby state (S2) and then transitions to the low voltage state 1 (S4). Conventionally, the low voltage state 1 (S4) makes a transition to the power off state (S1) after a predetermined time.

  In the present invention, a low voltage state 2 (S5) is provided, a transition is made to the low voltage state 1 (S4) and a predetermined procedure is performed, and then a transition is made to the low voltage state 2 (S5). References and emergency calls can be made.

  Referring also to the flowchart of FIG. 3, the main control unit that has received notification from the battery voltage monitoring detection unit that the battery voltage has dropped below a predetermined voltage in the standby state transitions to the low voltage state 1 and Start processing. A timer is started (S31), and an alarm sound from the speaker is instructed to notify that the voltage is low (S32). Then, the display unit is instructed to display a screen for knowing the low voltage state (S33). When the timer counts up (S34), the power supply control unit 16 is instructed to turn off the power supply to the hardware of the mobile communication terminal (S35). Therefore, in FIG. 1, to the peripheral circuit except the wireless unit 11, the baseband signal processing unit 12, the transmission / reception unit 13, the key input unit 14, the display unit 15, the speaker unit (not shown), and the CPU of the main control unit. The power supply of is stopped. After this procedure, transition to low voltage state 2.

  FIG. 4 is a flowchart of a control procedure performed by the main control unit after transitioning to the low voltage state 2.

  The operation of the main control unit in the low voltage state 2 will be described with reference to FIG. In the low voltage state 2, the CPU operates in the low clock sleep mode and scans the key input. However, power is not consumed because no power is supplied to other hardware components. If there is a key input from the key input unit 14 (S41) and the menu key is pressed, the power supply to the display unit 15 is turned on (S42), and the telephone directory function is activated (S43). Since power is supplied to the display unit in step 42, the telephone directory is displayed on the display screen by the activation of the telephone directory function, so that the user can refer to the desired telephone number by operating the cursor keys.

  After starting the phone book function, the guard timer is turned on (S44), and when the predetermined time has passed (S45), the power supply to the display unit 15 is turned off (S46) and the phone book function is stopped. (S47). Therefore, when a predetermined time necessary for referring to the telephone directory has elapsed, the power supply to the display unit is turned off again, and the power consumption can be reduced. After the telephone directory function is stopped, the process returns to step 41 as long as the predetermined voltage does not fall below the reference voltage 2 lower than the reference voltage 1 set as the reference for transitioning to the low voltage state 1, and calls again if necessary. You can refer to the book.

  If it is determined in step S41 that the key input is not a menu key press, it is determined whether or not the key input is an emergency call (S51). If it is not an emergency call, the process returns to step S41. That is, when the key input is not a telephone directory function call or an emergency call, the main control unit operates so as not to accept the key input. Therefore, less power is consumed by the CPU itself.

  In step 51, if the key input is an emergency call, that is, if the call is made to the fire department (119) or the police station (110), the power supply to the wireless unit 11 is turned on (S52), and the baseband The power supply to the signal processing unit 12 is turned on (S53), the power supply to the transmission / reception unit is turned on (S54), and control is performed so as to make a call and make a call. Therefore, when an emergency call is necessary, even if the battery voltage is lower than the reference voltage set for guaranteeing the normal communication function, it is possible to make a call by making a call.

  In step S55, the main control unit determines whether there is a key input for ending the call (S55). If the call is ended, the power supply to the wireless unit 11 is turned off (S56), and the base The power supply to the band signal processing unit 12 is turned off (S57), and the power supply to the transmission / reception unit 15 is turned off (S58). When the call is over and the predetermined reference voltage is not less than 2, the main control unit permits the use of the phone book reference and emergency call functions as required by the user. When the voltage drops below the predetermined reference voltage 2, the power supply is turned off.

  The present invention informs the user that communication from the mobile communication terminal is disabled when the battery voltage falls below the reference voltage that guarantees the normal communication operation of the mobile communication terminal, The power supply to the hardware component related to the function and the hardware component related to the display unit is stopped so that the communication function and the screen display function cannot be used. Further, the CPU operates with a low clock, thereby suppressing power consumption. When a user cannot use the terminal he / she owns or cannot receive an incoming call, he / she cannot use his / her normal communication function when he / she has to call the other party using a public telephone. If the phone number must be checked using the phone book of the phone book function of the terminal, if the user inputs a key and the key input is a press of a menu key, the display unit is immediately supplied with power. Therefore, the power supplied to the display unit is limited to the time required for referring to the phone book.

  Further, the present invention informs the user that communication from the mobile communication terminal is no longer possible when the battery voltage drops below the reference voltage that guarantees the normal communication operation of the mobile communication terminal, and the communication function of the terminal. The power supply to the hardware components related to the display unit and the hardware components related to the display unit is stopped so that the communication function and the screen display function cannot be used, and the CPU operates with a low clock, thereby suppressing the power consumption. In addition, in a situation where an emergency call must be made, if the key input entered by the user is pressing the telephone number and call key of the emergency call, the radio unit, baseband signal processing unit, transmission Since the power supply of the receiver is turned on so that they can operate and to communicate with the other party of the emergency call, even if the battery voltage falls below a predetermined reference level, the battery consumption is suppressed. Can handle emergency calls.

It is a block diagram of the mobile communication terminal which concerns on one Embodiment of this invention. It is a state transition diagram used for description of the present invention. 3 is a flowchart showing an operation of a main control unit in a low voltage state 1; 4 is a flowchart showing the operation of the main control unit in a low voltage state 2;

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Radio | wireless part 12 Baseband signal processing part 13 Transmission / reception part 14 Key input part 15 Display part 16 Power supply control part 17 Power supply part 18 Battery 19 Battery voltage monitoring detection part 20 Main control part

Claims (9)

  In a mobile communication terminal including hardware components such as a radio unit, a display unit, a transmission / reception unit, a power source unit that supplies power to the hardware component, and a battery voltage monitoring unit that monitors the battery voltage, the battery voltage is predetermined. When the voltage is detected, the power supply is turned off to the hardware components related to the provision of functions such as communication functions and additional functions to stop the function, and the telephone book is responded to the key input instructing the activation of the telephone book function. A mobile communication terminal including a control unit that turns on power supply to a hardware component related to a function.   The mobile communication terminal according to claim 1, wherein the power supply to the hardware component related to the telephone directory function includes turning on the power supply to the display unit. The mobile communication terminal according to claim 1, wherein the control unit turns off power supply to a hardware component related to the telephone directory function after a predetermined time appropriate for referring to the telephone directory.   The control unit detects the predetermined voltage, generates an alarm and displays that the low voltage state is displayed, and then turns off power supply to hardware components related to the functions such as the communication function and the additional function. The mobile communication terminal according to claim 1, 2 or 3.   5. The mobile communication terminal according to claim 1, wherein the control unit stops all functions by turning off power supply to hardware components related to the provision of functions such as the communication function and additional functions.   In a mobile communication terminal including hardware components such as a radio unit, a display unit, a transmission / reception unit, a power source unit that supplies power to the hardware component, and a battery voltage monitoring unit that monitors the battery voltage, the battery voltage is predetermined. When a voltage is detected, the power supply to the hardware components related to the provision of functions such as communication functions and additional functions is turned off to stop the function, and the emergency call is made in response to the key input instructing the activation of the emergency call. A mobile communication terminal including a control unit that turns on power supply to a hardware component related to transmission.   The mobile communication terminal according to claim 6, wherein the wireless component, the baseband signal processing unit, and the transmission / reception unit are included as hardware components whose power supply is turned on by key input of the emergency call.   The mobile communication terminal according to claim 7, wherein the control unit turns off power supply to the radio unit, the baseband signal processing unit, and the transmission / reception unit in response to an emergency call termination operation. In a mobile communication terminal including hardware components such as a radio unit, a display unit, a transmitter / receiver unit, a power source unit that supplies power to the hardware component, and a battery voltage monitoring unit that monitors the battery voltage, the battery voltage is predetermined. When a voltage is detected, the power supply to the hardware components related to the provision of functions such as communication functions and additional functions is turned off to stop the function, and key input for instructing activation of the telephone directory function and an emergency call are instructed. A mobile communication terminal including a control unit that turns on power supply to hardware components related to a telephone directory function and an emergency call function in response to a key input.

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