JP2006295312A - Wireless communication terminal, operation control method and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wireless communication terminal which can notify a user that noncommunicable state will occur even in case of a portable information terminal mounting a stereo speaker, and to provide operation control method and program. <P>SOLUTION: When a transition is made to low voltage operation mode, driving of stereo speakers 8 and 9 is stopped for a driver 21 and a voltage supply control circuit 24 performs selective control of a circuit section being supplied with voltage and a driver. An LED 162 is switched to faint lighting mode and driving of LEDs 161 and 163, a call termination informing LED 10, a sub-display section 5, and the driver 21 is stopped. Since voltage supply to a wireless processing section 12 is stopped, the user cannot communicate with other person but can read/write and display data stored in a storage section 14. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a wireless communication terminal represented by a mobile phone, an operation control method, and an operation control program.

In recent years, in addition to communication functions, mobile phones equipped with devices that are relatively loaded during driving have become widespread. In general, when a battery is depleted, a conventional mobile phone cannot perform a call function with the largest driving voltage first, but even in such a state, it reaches a limit voltage that can control the memory function. Until now, a mobile phone capable of browsing user data such as a telephone number and an e-mail address has been disclosed (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 5-252092

  However, many recent mobile phones are equipped with high-load stereo speakers in order to provide high-quality ringtones. Since the minimum drive voltage of this stereo speaker is greater than the minimum drive voltage of the communication unit, when the power supply voltage falls below the minimum drive voltage of the communication unit, this cannot be warned and the power is turned on without the user's knowledge. There was a problem of falling.

  Accordingly, an object of the present invention is to provide a wireless communication terminal and an operation control method capable of notifying the user of a portable information terminal (wireless communication terminal) equipped with a stereo speaker before reaching a state where communication is impossible. And providing an operation control program.

  In order to solve the above problem, the invention according to claim 1 is driven by a wireless communication means and a voltage value higher than a voltage value for operating the wireless communication means, and at least the wireless communication means detects an incoming call. Output means for outputting a notification sound, power supply means for supplying power to the wireless communication means and the output means, and whether or not the voltage value of the power supply means falls below a minimum operating voltage for driving the output means If the determination means and the determination means determine that the voltage value of the power supply means is lower than the minimum operating voltage for driving the output means, supply of power to the wireless communication means is performed. And a first stop means for stopping.

  According to a second aspect of the present invention, in the wireless communication terminal according to the first aspect, when the determination unit determines that the voltage value of the power supply unit is lower than a minimum operating voltage for driving the output unit, The display device further includes display means for displaying the determination result.

  According to a third aspect of the present invention, in the wireless communication terminal according to the first or second aspect, the voltage value of the power supply means is the output by the first illumination means for illuminating the display means and the determination means. And adjusting means for adjusting a voltage value to be supplied to the first illumination means when it is determined that the voltage is lower than a minimum operating voltage for driving the means.

  According to a fourth aspect of the present invention, in the wireless communication terminal according to any one of the first to third aspects, the key input unit, the second illumination unit that illuminates the key input unit, and the determination unit And a second stop means for stopping the supply of power to the second illumination means when it is determined that the voltage value of the power supply means is lower than the minimum operating voltage for driving the output means. It is said.

  According to a fifth aspect of the present invention, in the wireless communication terminal according to any one of the first to fourth aspects, the power supply means includes: a light emitting means for notifying an incoming call by the wireless communication means by light emission; and the determination means. And a third stop means for stopping the supply of power to the light emitting means when it is determined that the voltage value is lower than the minimum operating voltage for driving the output means.

  A sixth aspect of the present invention is the wireless communication terminal according to any one of the first to fifth aspects, wherein the voltage value of the power supply means drives the output means by the imaging means and the determination means. And a fourth stop means for stopping the supply of the voltage to the image pickup means when it is determined that the voltage has fallen below the voltage.

  According to a seventh aspect of the present invention, in the wireless communication terminal according to any one of the first to sixth aspects, the output means is a stereo speaker.

  In order to solve the above problem, the invention according to claim 8 is driven by a wireless communication unit and a voltage value higher than a voltage value for operating the wireless communication unit, and at least an incoming call is received by the wireless communication unit. An operation control method of a wireless communication terminal comprising an output unit that outputs a notification sound when detected, wherein a voltage value of a power supply unit that supplies power to the wireless communication unit and the output unit drives the output unit In the determination step for determining whether or not the minimum operating voltage to be reduced is determined, and in the determination step, when it is determined that the voltage value of the power supply unit is lower than the minimum operating voltage for driving the output unit, And a stop step for stopping the supply of power to the wireless communication unit.

    In order to solve the above problem, the invention according to claim 9 is driven by a wireless communication unit and a voltage value higher than a voltage value for operating the wireless communication unit, and at least the wireless communication unit receives an incoming call. An operation control program executed by a computer including an output unit that outputs a notification sound when detected, wherein a voltage value of a power supply unit that supplies power to the wireless communication unit and the output unit drives the output unit In the determination step for determining whether or not the minimum operating voltage to be reduced is determined, and in the determination step, when it is determined that the voltage value of the power supply unit is lower than the minimum operating voltage for driving the output unit, And a stop step of stopping the supply of power to the wireless communication unit.

  According to the present invention, for example, by setting a criterion for determining the low voltage operation mode to a limit voltage at which the stereo speaker can sound a notification sound, it is possible to reliably notify the user that the remaining voltage is low, thereby For example, the user can browse the minimum necessary data.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  First, FIG. 1 shows a schematic configuration diagram of a foldable portable information terminal 100 (hereinafter referred to as a mobile phone), where (a) is a plan view and (b) is a bottom view. The mobile phone 100 includes a call speaker 1, a main display unit 2, a key input unit 3, a microphone 4, a sub display unit 5, a camera lens unit 6, a rechargeable battery 7, stereo speakers 8 and 9, an incoming call notification (also for shooting) Light) It is comprised by LED10 grade | etc.,. The call speaker 1, the main display unit 2, the sub display unit 5, the camera lens unit 6, and the incoming call notification (and photographing light) LED 10 are provided on the cover unit 101, the key input unit 3, the microphone 4, The rechargeable battery 7, the stereo speakers 8 and 9, and the antenna 11 (described later) are provided in the main body 102. The lid 101 and the main body 102 are configured to be foldable by a hinge 103.

  The call speaker 1 outputs the voice of a person who makes a call with the user via the mobile phone 100. The stereo speakers 8 and 9 output a melody to notify the user that there has been an incoming call, and also output musical tone information in stereo by developing an audio file when used as a media player. The incoming call notification (and photographing light) LED 10 not only notifies the user that there is an incoming call by light emission, but is also used as a light source for irradiating the subject in the camera mode. The main display unit 2 includes a display screen such as an LCD (Liquid Crystal Display), and is a main display screen for performing all operations. Displays phone book information, mail creation, recipient information for received calls, etc. The key input unit 3 includes various function keys, and performs various instructions by inputting mail transmission / reception, mail creation, phone book registration, and the like. The microphone 4 receives voice input from the user. The sub display unit 5 has the same configuration as the main display unit 2 and is an auxiliary display screen that displays an incoming call notification, a mail reception notification, receiving destination information, etc. when the mobile phone 100 is in a closed state. . The camera lens unit 6 switches the mobile phone 100 to the camera mode and displays an image on the main display unit 2 or the sub display unit 5 when taking an image. The rechargeable battery 7 is a power source for operating the mobile phone 100.

  Next, with reference to FIG. 2, the main part structure of the mobile phone 100 is shown. The mobile phone 100 includes an antenna 11, a wireless processing unit 12, a control unit 13, a storage unit 14, a sound processing unit 15, a driver control unit 16, LEDs 161 to 163, drivers 17, 21 and a CCD 18 in addition to the units shown in FIG. The image processing unit 19, the sound source ROM 20, the speaker 22, the voltage monitoring unit 23, and the voltage supply control circuit 24 are connected by the bus B.

  The wireless processing unit 12 receives the voice information input through the microphone 4 and converted into a predetermined compression encoding format by the voice processing unit 15 when the user makes a telephone call. The signal is modulated and transmitted to an external base station via the antenna 11, while the radio signal received from the base station via the antenna 11 is demodulated into digital data. 15 is output. If the digital data is packet data, a process of passing various data (mail data or download data) restored from the packet data to the control unit 13 is performed. Note that the minimum drive voltage of the wireless processing unit 12 is 3.3V.

  The control unit 13 controls the operation of each unit. As will be described later, the setting table 131 stores the operation contents of each unit controlled when the normal operation is switched to the low voltage operation. The storage unit 14 has an electronic notebook function, and stores user profile data including a telephone number stored in advance in the mobile phone 100, telephone number data of contact information, mail address data, and the like. In addition, the captured image file data, transmission / reception mail item data, and melody file data are stored. Then, these data are displayed and output via the main display unit 2 and the sub display unit 5 according to a control signal from the control unit 13 or output to the sound source ROM 20.

  The audio processing unit 15 converts the audio signal input via the microphone 4 into a predetermined compression encoding format and outputs it to the bus B, and also restores the digital data input from the bus B during audio communication Then, it is converted into an audio signal and output to the speaker 1 for calling.

  Each of the LEDs 161 to 163 and the incoming call notification (and photographing light) LED 10 includes a driver that is driven by an applied voltage value, and the applied voltage is controlled by the driver control unit 16. The LEDs 161 to 163 have a function of irradiating the main display unit 2, the sub display unit 5, and the key input unit 3. Specifically, the key input unit 3 is partially or entirely made of a light transmitting member, and a plurality of LEDs 161 are provided directly below the key input unit 3 inside the mobile phone. The LED 162 is used as a backlight light source for the main display unit 2, and the LED 163 is used as a backlight light source for the sub display unit 5. The driver control unit 16 controls the applied voltage to the LEDs 161 to 163 and the incoming call notification (and photographing light) LED 10, but only the LED 162 is lighted by making the applied voltage value smaller than a normal value. be able to.

  The main display unit 2 displays the state of the mobile phone 100 (received radio wave state, voice incoming state, mail incoming state, execution state and current time of various applications), and various data stored in the storage unit 14 described later. Is displayed. The sub display unit 5 displays various data mainly in a folded state. The driver 17 has a buffer area and drives the main display unit 2 and the sub display unit 5.

  The CCD 18 is an imaging device and is provided in the back of the camera lens unit 6. The imaging processing unit 19 has a function of converting the image data output from the CCD 18 into digital data or converting it into a predetermined file format and outputting it to the storage unit 14.

  The sound source ROM 20 stores various sound sources as digital data. For example, when the melody file data stored in the storage unit 14 is read out under the control of the control unit 13, this data is supplied to drive the driver 21.

  The driver 21 is a circuit unit that drives the stereo speakers 8 and 9 and the speaker 22, and causes the stereo speakers 8 and 9 to reproduce the musical sound information and the incoming notification sound based on the contents of the melody file data. In addition, a key input sound and a notification sound by detecting each circuit state of the mobile phone 100 are monaurally output by the speaker 22. The minimum drive voltage of the driver 21 is different between the case of driving the stereo speakers 8 and 9 and the case of driving the speaker 22, and is 3.4 V for the stereo speakers 8 and 9 and lower than that for the speaker 22. In other words, when the supplied drive voltage is lower than 3.4 V, only the speaker 22 can operate for a predetermined time, in this embodiment, 30 seconds from the level 3 detection in the present embodiment.

  The voltage monitoring unit 23 constantly monitors the state of the power supply voltage supplied by the rechargeable battery 7 and outputs the current supply voltage to the control unit 13 at a predetermined cycle as a monitoring result. The rechargeable battery 7 supplies a driving voltage to the entire mobile phone 100. The voltage supply control circuit 24 is controlled by the control unit 13 and selects a circuit unit and a driver to be supplied.

  Next, a control operation by the control unit 13 of the mobile phone 100 will be described with reference to FIG. FIG. 3 illustrates the setting contents of the setting table 131 of the control unit 13. In the figure, the level of the power supply voltage supplied to the mobile phone 100 is set in four stages. Level 1 is a state where the power supply voltage value is up to 4.2 V, and is a normal operating voltage at which each circuit unit can normally operate without any problem. Level 2 is a state where the power supply voltage value is up to 3.4 V, and is an output guarantee voltage (minimum operating voltage) necessary for driving the stereo speakers 8 and 9. This output guarantee voltage is a reference voltage value (described later) when the mode is switched. Levels 1 and 2 are levels at which each circuit unit of the mobile phone 100 can normally operate, and are hereinafter referred to as a normal mode. Level 3 is a state in which the power supply voltage value is up to 3.3 V, and is the minimum drive guarantee voltage of the wireless processing unit 12. Level 4 is a state in which the power supply voltage value is 3.0 V. If the level falls below this level, the cellular phone 100 does not operate normally, and power supply to the entire circuit is stopped. Therefore, levels 3 and 4 indicate that the voltage supply control circuit 24 has a driver 17 (driving only the main display unit 2), a driver control unit 16 (light lamp driving control only for the LED 162), an LED 162, and a speaker 22 (from level 3 detection). For only 30 seconds, control is performed so that a power supply voltage is supplied to a pressure-sensitive sensor (not shown) of the key input unit 3. Therefore, in the low voltage operation mode, it is possible to read and write data stored in the storage unit 14 and display data only on the main display unit 2 (hereinafter, this operation state is referred to as a low voltage operation mode). Called).

  In the cellular phone 100, when it is detected by the input from the voltage monitoring unit 23 that the level is 2, that is, the output guaranteed voltage is below 3.4V, the mode is forcibly shifted from the normal mode to the low voltage operation mode. Is performed. That is, based on the input from the voltage monitoring unit 23, the control unit 13 refers to the setting table 131 and determines that the power supply voltage value of the rechargeable battery 7 is lower than the guaranteed output voltage 3.4 V. On the other hand, the voltage applied to the LED 162 is adjusted to switch to the low light mode, and the driving of the LED 161, the LED 163, and the incoming call notification (and photographing light) LED 10 is stopped. Further, the driver 17 is controlled to drive only the main display unit 2, and the driver 21 is stopped from driving the stereo speakers 8 and 9. Further, the wireless processing unit 12 also stops the operation, and also stops the operation of the camera device including the CCD 18 and the imaging processing unit 19.

  FIG. 4 shows a battery voltage distribution in the mobile phone 100.

  In FIG. 4, a solid line 30 indicates a change in the power supply voltage when the mobile phone 100 of the present invention is shifted to the low voltage operation mode, and a one-dot broken line 40 indicates that the low voltage operation mode is set in the mobile phone 100 of the present invention. The power supply voltage distribution when the case where it is not carried out is assumed is shown.

  As can be seen from FIG. 4, when the low voltage operation mode is not set, the power consumption does not change even when the output guaranteed voltage is below 3.4 V, and the voltage supply to the entire mobile phone 100 is stopped after the elapse of T2 time. The power is turned off. On the other hand, when the transition to the low voltage operation mode is set, the control operation for each unit is executed, so that the power consumption can be reduced. Accordingly, the voltage supply to the entire mobile phone 100 is stopped and the power supply is turned off after a lapse of T3 time longer than when the low voltage operation mode is not set. When comparing the solid line 40 and the one-dot broken line 30, when the mode is shifted to the low voltage operation mode, the time when the end voltage is lower than 3.0V is slower, and by the mode transition, the data reading from the storage unit 14 is performed for a longer time. Writing and display of data on the main display unit 2 are possible.

  As described above, after the notification sound is sounded, the transition to the low-voltage operation mode is performed, so that the user falls below the voltage value at which the power supply voltage of the rechargeable battery 7 can be normally used and the transition to the low-voltage operation mode is made. Can be confirmed. In addition, since the low voltage operation mode is a low voltage operation state realized by executing the operation control of each part, the user can read and write data even if the power consumption is reduced and communication processing with the outside is not performed. The mobile phone 100 capable of displaying can be provided.

  Next, processing for shifting the mobile phone 100 to the low voltage operation mode will be described with reference to the flowchart of FIG.

  First, it is determined whether or not the mode setting of the low voltage operation mode is set to ON (step S1). When it is determined in step S1 that the low voltage operation mode is set to OFF, that is, it is determined that the low voltage operation mode is not set (step S1; NO), the process ends without performing any processing. . If it is determined in step S1 that the low-voltage operation mode setting is set to ON (step S1; YES), it is determined whether or not the power supply voltage is equal to or lower than the guaranteed output voltage of the stereo speakers 8 and 9. (Step S2).

  If it is determined in step S2 that the power supply voltage is not lower than the output guarantee voltage (step S2; NO), the determination in step S2 is repeated again. If it is determined in step S2 that the power supply voltage is equal to or lower than the guaranteed output voltage (step S2; YES), the mobile phone 100 is shifted to the low voltage operation mode, and the determination process ends.

  Next, processing performed when the mobile phone 100 is shifted to the low voltage operation mode will be described with reference to a flowchart of FIG.

  When the mode is shifted to the low-voltage operation mode, the driver 21 is stopped driving the stereo speakers 8 and 9 and the speaker 22 is driven for 30 seconds to output a notification sound to notify the user to that effect ( Step T1). In step T1, when a notification sound for notifying the user is output for 30 seconds, the voltage supply control circuit 24 performs selection control of a circuit unit and a driver to be supplied with voltage (step T2). At this time, the LED 162 is switched to the low light mode, and the driving of the LEDs 161 and 163, the incoming call notification LED 10, the sub display unit 5, and the driver 21 is stopped. Furthermore, since the voltage supply to the wireless processing unit 12 is also stopped, the user cannot communicate with others, but the data stored in the storage unit 14 can be read / written and displayed ( (See FIG. 3).

  In step T2, when the circuit unit and driver to be supplied with voltage are controlled, it is determined whether or not the power supply voltage of the mobile phone 100 has reached the end voltage (step T3). If it is determined in step T3 that the power supply voltage of the mobile phone 100 has not reached the end voltage (step T3; NO), the determination in step T3 is repeated.

  If it is determined in step T3 that the power supply voltage of the mobile phone 100 has reached the end voltage (step T3; YES), a power OFF process is performed to stop the voltage supply to the entire mobile phone 100 (step T4). ) The battery of the mobile phone 100 is turned off (step T5).

  Next, FIGS. 7A and 7B show examples of display screens displayed when the mode is shifted to the low voltage operation mode.

  First, FIG. 7A shows an example of a display screen displayed immediately before switching to the low voltage operation mode.

  In step T1 of FIG. 6, when a notification sound for notifying the transition to the low voltage operation mode is output from the speaker 22, a screen as shown in FIG. 7A is displayed on the display screen of the mobile phone 100 together with the output. Is done. After 30 seconds from the display of such a screen, the mobile phone 100 is forcibly shifted to the low voltage operation mode, and at the same time, the display screen is changed as shown in FIG. For example, when a notification sound is output and a message indicating that the low voltage operation mode is to be changed after 30 seconds is displayed on the display screen, “EMERGENCY” appears on the display screen after 30 seconds as shown in FIG. Is displayed. At this time, the level display 215 is changed to the low voltage operation mode display 216. Further, in the mobile phone 100 with a color display screen, the color display is changed to the monochrome display at the same time when the mode is shifted to the low voltage operation mode. When a screen as shown in FIG. 7B is displayed on the display screen of the mobile phone 100, the user can read / write and display data.

  As described above, when the power supply voltage of the mobile phone 100 falls below the voltage value at which normal operation is possible and the mode is shifted to the low voltage operation mode, the display screen displays that effect, so the user can only hear the notification sound. It can be confirmed visually and easily. Recently, the mobile phone 100 with a color display screen has been generalized, but power consumption by the color display screen is large. Therefore, the power consumption can be reduced by automatically switching the color display to the monochrome display at the same time as the transition to the low voltage operation mode, and the user can read / write and display data in as long a time as possible.

[First Modification]
The process described above is a process forcibly shifted to the low-voltage operation mode. However, as a first modification, a process when the transition to the low-voltage operation mode can be selected will be described. Since the appearance configuration, main part configuration, and level setting value of the mobile phone 100 are the same as those in the above-described embodiment, description and illustration are omitted. The modification is a modification of part of the processing described in the flowchart of FIG. 5 in the embodiment, and the same processing will be described using the same reference numerals.

  A flowchart of the first modification is shown in FIG. 8, and a process of switching the mobile phone 100 to the low voltage operation mode will be described with reference to this flowchart.

  First, it is determined whether or not the power supply voltage of the mobile phone 100 is equal to or lower than the output guarantee voltage (step S10). If it is determined in step S10 that the power supply voltage of the mobile phone 100 is not equal to or lower than the output guarantee voltage (step S10; NO), the determination in step S10 is repeated again.

  In step S10, when it is determined that the power supply voltage of the mobile phone 100 is equal to or lower than the guaranteed output voltage (step S10; YES), it is determined whether or not to switch to the low voltage operation mode (step S20). If it is determined in step S20 that the mode is not switched to the low voltage operation mode (step S20; NO), the process ends without shifting to the low voltage operation mode. In step S20, when it is determined to switch to the low voltage operation mode (step S20; YES), the mobile phone 100 is shifted to the low voltage operation mode (step S30).

  Next, FIG. 9 shows an example of a display screen displayed on the mobile phone 100 when the processing described above is executed.

  If it is determined in step S10 in FIG. 8 that the power supply voltage of the mobile phone 100 is equal to or lower than the guaranteed output voltage, a notification sound to that effect is output for 30 seconds from the speaker 22 and displayed on the display screen of the mobile phone 100. A selection screen as shown in FIG. 9A is displayed. When the screen as shown in FIG. 9A is displayed, the user can select whether or not to shift to the low voltage operation mode. When it is selected by the user's operation to shift to the low voltage operation mode, the display screen is changed as shown in FIG. At this time, the level display 215 is changed to the low voltage operation mode display 216 as in the case where the mode is forcibly shifted to the low voltage operation mode. When the low voltage operation mode is entered, the user can read / write data and display data.

  When the selection screen of FIG. 9A is displayed and the user selects not to shift to the low voltage operation mode, the power supply to the entire mobile phone 100 is stopped.

  As described above, the display can be switched according to the needs of the user by making the transition to the low voltage operation mode selectable instead of forcibly, and the user refrains from the necessary data. I can leave.

[Second Modification]
Next, as a second modification, a display method when an alarm is set in advance and the mode is shifted to the low voltage operation mode at the alarm setting time will be described. Note that the external configuration and the main configuration of the mobile phone 100 are the same as those in the above-described embodiment, and thus the description and illustration are omitted.

  In the mobile phone 100 according to the second modified example, if an alarm is set in advance, the alarm setting content is displayed on the display screen when the mode is shifted to the low voltage operation mode. It is always determined whether or not the current time matches the alarm setting time, and this operation is executed when the current time is the time to shift to the low-voltage operation mode and the time matches the alarm setting time. Is done. When this operation is executed, the user can view the alarm setting contents as data.

  With reference to the flowchart of FIG. 10, a process when an alarm is set in advance in the mobile phone 100 according to the second modification will be described.

  First, it is determined whether or not the low voltage operation mode setting is set to ON (step P1). If it is determined in step P1 that the low-voltage operation mode is set (step P1; YES), it is determined whether or not the power supply voltage of the mobile phone 100 is equal to or lower than the guaranteed output voltage (step P2). If it is determined in step P2 that the power supply voltage of the mobile phone 100 is not lower than the output guarantee voltage (step P2; NO), the determination in step P2 is repeated again.

  If it is determined in step P2 that the power supply voltage of the mobile phone 100 is equal to or lower than the output guarantee voltage (step P2; YES), it is determined whether or not the current time matches the alarm setting time (step P3). If it is determined in step P3 that the current time does not coincide with the alarm set time (step P3; NO), the determination in step P3 is repeated again.

  If it is determined in step P3 that the current time coincides with the alarm set time (step P3; YES), it is again determined whether or not the low voltage operation mode is set (step P4). If it is determined in step P4 that the low voltage operation mode is not set (step P4; NO), since the normal mode is set, an alarm notification sound is output from the stereo speakers 8 and 9 as in the normal operation. Is output (step P6). If it is determined in step P4 that the low voltage operation mode is set (step P4; YES), the alarm notification sound is not output and the set schedule content is displayed on the main display unit 2 (step S4). P5).

  Next, FIG. 11 shows an example of a display screen displayed on the mobile phone 100 when the processing described above is executed.

  FIG. 11A shows an example of a display screen immediately before switching to the low voltage operation mode, and FIG. 11B shows an example of a display screen after switching to the low voltage operation mode.

  If it is determined in step P4 of FIG. 10 that the low voltage operation mode is set, a screen as shown in FIG. 11A is displayed on the display screen of the mobile phone 100. After such a screen is displayed, after the displayed time elapses, the mobile phone 100 is forcibly shifted to the low voltage operation mode, and at the same time, the display screen is changed as shown in FIG. For example, if an alarm setting has been made in advance for registering a schedule such as a meeting or contacting a customer, the setting content is displayed on the display screen. At this time, the level display 215 is changed to the low voltage operation mode display 216 as in the embodiment and the first modification. Further, in the mobile phone 100 with a color display screen, the color display is changed to the monochrome display at the same time when the mode is shifted to the low voltage operation mode. When the screen as shown in FIG. 11B is displayed on the display screen of the mobile phone 100, the user can browse the user data and the alarm setting contents.

  As described above, when the mobile phone 100 in which the alarm is set in advance is shifted to the low voltage operation mode because the remaining battery level is low, the user can turn on the power by displaying the alarm setting content. It is possible to confirm the schedule set at the current time before becomes OFF. Therefore, it is possible to avoid a situation in which a schedule cannot be confirmed and an important meeting or a meeting is forgotten because the power of the mobile phone 100 is turned off. Furthermore, since data can be read and displayed, information such as the telephone number and mail address of the customer who is scheduled to be contacted can be saved in advance, and this low-voltage operation situation can be accommodated. It is possible.

  Although the mobile phone 100 according to the second modification is forcibly shifted to the low voltage operation mode, the mobile phone 100 according to the first modification can be selected to shift to the low voltage operation mode. The same effect can be obtained.

  In addition, in the mobile phone 100 according to the embodiment, the first modified example, and the second modified example, the display when the mode is shifted to the low voltage operation mode is not limited to the low voltage operation mode display 16. It is also possible to display a dedicated wallpaper. Furthermore, in this embodiment, when the mode is shifted to the low voltage operation mode, the user can read / write and display data. However, if the operation is to be performed longer, the power supply voltage is at the level. Only when it becomes 4, data writing may be prohibited.

It is a figure which shows the open state of a folding-type mobile telephone, (a) A top view, (b) It is a bottom part. It is a figure which shows the principal part structure of a foldable mobile telephone. It is a table | surface which shows the level set in the foldable mobile telephone of this embodiment, and control operation accompanying it. It is a figure which shows battery voltage distribution in the foldable mobile phone of this embodiment. 6 is a flowchart illustrating processing executed when the folding mobile phone according to the present embodiment is shifted to a low voltage operation mode. 6 is a flowchart showing processing executed after the shift to the low voltage operation mode in the foldable mobile phone according to the present embodiment. In the foldable mobile phone of this embodiment, it is a figure which shows an example of the display screen displayed when it transfers to low voltage operation mode forcibly. It is a flowchart which shows the process performed in the mobile telephone which concerns on a 1st modification. It is a figure which shows an example of the display screen displayed when it transfers to low voltage operation mode in the mobile telephone which concerns on a 1st modification. It is a flowchart which shows the process performed in the mobile telephone which concerns on a 2nd modification. It is a figure which shows an example of the display screen displayed when changing to the low voltage operation mode in the radial telephone which concerns on a 2nd modification.

Explanation of symbols

1 Communication speaker 2 Main display (display)
3 Key input section (key input means)
4 Microphone 5 Sub display unit 6 Camera lens unit 7 Rechargeable battery (power supply means)
8, 9 Stereo speakers (output means, output unit)
10 Incoming call notification (and shooting light) LED (light emitting means)
11 Antenna 12 Wireless processing unit (wireless communication means, wireless communication unit)
13 Control unit (determination means, first stop means, second stop means, third stop means, fourth stop means)
14 Storage Unit 15 Audio Processing Unit 16 Driver Control Unit (Adjustment Unit)
17, 21 Driver 18 CCD (imaging means)
19 Imaging processing unit 20 Sound source ROM
22 Speaker 23 Voltage Monitor 24 Voltage Supply Control Circuit 101 Lid 102 Main Body 131 Setting Table 161 LED (Second Illuminating Unit)
162 LED (first illumination means)
163 LED
215 Level display 216 Low voltage operation mode display

Claims (9)

Wireless communication means;
Driving with a voltage value higher than the voltage value for operating this wireless communication means, at least an output means for outputting a notification sound when an incoming call is detected by the wireless communication means;
Power supply means for supplying power to the wireless communication means and the output means;
Determining means for determining whether or not a voltage value of the power supply means is lower than a minimum operating voltage for driving the output means;
A first stopping unit for stopping the supply of power to the wireless communication unit when the determination unit determines that the voltage value of the power supply unit is lower than a minimum operating voltage for driving the output unit; A wireless communication terminal comprising:   2. The display device according to claim 1, further comprising a display unit configured to display a determination result when the determination unit determines that the voltage value of the power supply unit is lower than a minimum operating voltage for driving the output unit. The wireless communication terminal described. First illumination means for illuminating the display means;
When the determination unit determines that the voltage value of the power supply unit is lower than a minimum operating voltage for driving the output unit, the determination unit further includes an adjustment unit that adjusts the voltage value supplied to the first illumination unit. The wireless communication terminal according to claim 1, wherein the wireless communication terminal is a wireless communication terminal. Key input means;
A second illumination means for illuminating the key input means;
A second stop means for stopping the supply of power to the second illumination means when the determination means determines that the voltage value of the power supply means is below a minimum operating voltage for driving the output means; The wireless communication terminal according to claim 1, further comprising: A light emitting means for notifying an incoming call by the wireless communication means by light emission;
And a third stop means for stopping the supply of power to the light emitting means when it is determined by the determining means that the voltage value of the power supply means is lower than a minimum operating voltage for driving the output means. The wireless communication terminal according to claim 1, wherein the wireless communication terminal is a wireless communication terminal. Imaging means;
And a fourth stop means for stopping the supply of voltage to the imaging means when the determination means determines that the voltage value of the power supply means is lower than the minimum operating voltage for driving the output means. The wireless communication terminal according to claim 1, wherein the wireless communication terminal is a wireless communication terminal.   The wireless communication terminal according to claim 1, wherein the output unit is a stereo speaker. Operation of a wireless communication terminal including a wireless communication unit and an output unit that is driven at a voltage value higher than a voltage value for operating the wireless communication unit and outputs at least a notification sound when an incoming call is detected by the wireless communication unit A control method,
A determination step of determining whether or not a voltage value of a power supply unit that supplies power to the wireless communication unit and the output unit is lower than a minimum operating voltage that drives the output unit;
When it is determined in the determination step that the voltage value of the power supply unit is lower than a minimum operating voltage for driving the output unit, a stop step of stopping supply of power to the wireless communication unit is included. An operation control method characterized by the above. Operation performed by a computer including a wireless communication unit and an output unit that is driven at a voltage value higher than a voltage value for operating the wireless communication unit and outputs at least a notification sound when an incoming call is detected by the wireless communication unit A control program,
A determination step of determining whether or not a voltage value of a power supply unit that supplies power to the wireless communication unit and the output unit is lower than a minimum operating voltage that drives the output unit;
When it is determined in the determination step that the voltage value of the power supply unit is lower than a minimum operating voltage for driving the output unit, a stop step of stopping the power supply to the wireless communication unit is executed An operation control program characterized in that

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