JP2008092304A - Mobile terminal device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mobile terminal device mounted with non-contact IC functions which can improve security without damaging convenience for users and prevent an unauthorized use by a third person beforehand. <P>SOLUTION: A cellular phone 100 has a FeliCa IC module 190 which performs non-contact communication with an external reader/writer 200, an inclination sensor 160 which detects an inclination of a main body of the cellular phone 100, and a power supply IC 180 which individually supplies electric power to the main body of the cellular phone 100 and the FeliCa IC module 190. If the inclination of the main body of the cellular phone 100 is equal to or larger than a specified value based on the horizontal direction (a position at which the cellular phone 100 is held up to the external reader/writer 200), a controller 110 determines that a user dose not use the FeliCa IC module 190, and then performs non-contact IC security control to stop power supply to the FeliCa IC module 190. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a communication terminal device such as a mobile phone equipped with a non-contact IC function for performing non-contact communication with an external reader / writer.

  In addition to the telephone call function, mobile phones are added with various functions such as a network connection function and a camera photographing function, and are becoming increasingly multifunctional. A mobile phone equipped with a non-contact IC function has been proposed in the multi-functionalization. For example, Patent Document 1 discloses a mobile phone equipped with a non-contact IC card antenna module.

  The non-contact IC card operates by using a radio wave generated by an IC card reader / writer for power supply by electromagnetic induction using an antenna coil. A non-contact IC card cannot always receive stable power because it receives power supply via a medium called radio waves. In order to supply power stably, a non-contact IC card equipped with a secondary battery or an external power source such as a capacitor or a battery has already been proposed. Further, the non-contact IC chip includes, for example, a FeliCa (registered trademark) IC module.

When a mobile phone equipped with a contactless IC function, such as a FeliCa IC module, is used for an application with a monetary value, such as a prepaid card, credit card, or public transport ticket, the user is the owner of the IC card. It is desirable to be able to perform identity authentication to confirm the identity. For example, Patent Document 2 discloses a mobile phone that accepts an input of a personal identification number (password or PIN: Personal Identifier Number) prior to use of an IC card function and performs personal authentication. Patent Document 3 discloses a portable terminal device that performs identity verification using biometric information such as a fingerprint sensor.
JP 2002-218031 A JP 2003-16398 A JP 2003-271937 A

  Currently, in a portable terminal device equipped with a non-contact IC function, power is supplied to the non-contact IC function unit from a battery regardless of the power ON / OFF of the portable terminal device. As a result, even when the power of the portable terminal device equipped with the non-contact IC function is turned off, the non-contact IC function unit receives power supply from an external reader / writer (for example, installed near the cash register of a convenience store). Thus, non-contact communication operation is performed, and it becomes possible to use payment after the authentication is confirmed.

  However, since the power is constantly supplied to the non-contact IC function unit, the following problems occur.

  When the mobile terminal device having the non-contact IC function is a mobile phone, for example, the person himself / herself is often put in a pocket or the like, but is often kept in a bag or the like. When this mobile phone is placed in a thin-cloth bag such as a tote bag, the power is always supplied to the non-contact IC function unit, so that the non-contact IC function unit can communicate with the non-contact IC function unit. Is possible. If an unauthorized user secretly communicates with the non-contact IC function unit from outside the bag and steals information by skimming, the unauthorized user cannot prevent unauthorized use of the non-contact IC function. There is a risk of unauthorized use of contactless IC functions and information loss without the knowledge of the person. For IC cards, biometric authentication (fingerprint authentication, iris, hand vein authentication, etc.) is used together to prevent unauthorized use, and there is a risk of unauthorized use such as skimming due to increased awareness of unauthorized use by users. As is well known, countermeasures against unauthorized use of the non-contact IC function of a mobile phone are completely defenseless. The above is an example of a case where a mobile phone equipped with a non-contact IC function is put in the back, but the same applies to the case where it is put in a pocket or the like.

  As described above, there is a problem that a non-contact IC function capable of non-contact communication operation is mounted on a portable phone familiar to anyone in a constantly operable state. In addition, not being aware of the danger further promotes the danger. Adequate safety measures are required.

  Of course, it is also conceivable that the non-contact IC function unit is energized only when necessary, not always energized. However, in this case, it is necessary for the user to make settings for this purpose, and every time the user wants to use the non-contact IC function, an operation to turn on the power of the non-contact IC function unit must be performed. In this case, the original convenience of the non-contact IC function that the intended operation can be performed only by bringing the portable terminal device equipped with the non-contact IC function close to the reader / writer device is diminished.

  The present invention has been made in view of this point, and can improve security without impairing the convenience of the user, and can prevent unauthorized use by a third party in advance. It aims at providing the portable terminal device which mounts.

  The portable terminal device according to the present invention includes a non-contact communication unit that performs non-contact communication with an external reader / writer, a detection unit that detects a usage state of a user, a device main body, and the non-contact communication unit. Based on the power supply means for supplying power and the detected use status information of the user, when it is determined that the user is not in use of the non-contact communication means, the power supply to the non-contact communication means is performed. A configuration including control means for stopping is adopted.

  According to the present invention, security can be improved without impairing user convenience, and unauthorized use by a third party can be prevented.

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

(Embodiment 1)
FIG. 1 is a block diagram showing a schematic configuration of the mobile terminal device according to the first embodiment of the present invention. The mobile terminal device of this embodiment is an example applied to a mobile phone / PHS (Personal Handy-Phone System) equipped with a FeliCa IC as a non-contact IC function.

  1, the mobile phone 100 includes a control unit 110, a storage memory 120, an input unit 130, a display unit 140, a wireless communication unit 150, a tilt sensor 160, a battery pack 170, a power supply IC 180, and a FeliCa IC module 190. Is done. The FeliCa IC module 190 receives a radio wave transmitted from the external reader / writer 200 and performs short-distance bidirectional communication (for example, 13.56 MHz, 100 to 400 kbps) with the external reader / writer 200.

  The control unit 110 includes a CPU and controls the entire mobile phone 100. When the user determines that the user does not use the FeliCa IC module 190 based on the detection result from the tilt sensor 160, the control unit 110 receives the FeliCa from the power supply IC 180. Control to stop the power supply to the IC module 190 is performed.

  The storage memory 120 is composed of a ROM that stores control programs, fixed data, and the like, a semiconductor memory such as a RAM that is a working storage area of the CPU, and a hard disk, and stores character information, image information, and audio signals that are received or input. . The ROM is a read-only semiconductor memory that stores fixed data such as a program and communication control data required when the control unit 110 operates. The RAM is used as a so-called working memory that temporarily stores data related to display and communication, data used for calculation, calculation results, and the like. A program processed by the mobile phone 100 is expanded in the RAM and executed. Further, a part of the RAM is composed of an electrically erasable programmable ROM (EEPROM) which is an electrically rewritable nonvolatile memory, and various specifications in the cellular phone 100 can be changed by changing a program written in the EEPROM. Can do.

  The input unit 130 includes telephone function keys, cross keys, mode keys, dial keys, and the like, and inputs data by user operations.

  The display unit 140 is configured by a dot matrix color LCD display, EL (Electro Luminescence), white LED backlight, each driver, and the like, and displays information such as received information, image information, text information, and the like in color.

  Wireless communication unit 150 controls transmission / reception of wireless communication of mobile phone 100.

  The tilt sensor 160 detects the tilt of the mobile phone 100 main body. For example, a gravity sensor that detects the inclination of the mobile phone body with respect to the direction of gravity relative to the direction of gravity applied to the mobile phone 100 (that is, a vertical line) is used as the tilt sensor 160. The tilt sensor 160 only needs to detect that the mobile phone body is placed almost horizontally, and it is not necessary to use a complicated and expensive sensor such as a gyro sensor.

  In the present embodiment, an example of using a tilt sensor that detects the tilt of the main body of the mobile phone 100 is used as the detecting means for detecting the usage state of the user. It is also possible to detect the usage status of the user by using a contact sensor for detecting contact with the apparatus main body, a temperature sensor for detecting a temperature change of the outer peripheral portion of the apparatus main body, or the like. For example, a light amount sensor is installed and a change such as when the ambient brightness changes is detected to detect that the main body of the mobile phone 100 is stored in the back or the like. Alternatively, a contact sensor is installed to detect that the user is holding the mobile phone 100 main body by hand. It is also possible to detect a user's hand holding by detecting a temperature change of a part held by a temperature sensor. In this case, the use status of the user can be detected in more detail by combining different types of sensors such as an inclination sensor and a light quantity sensor.

  The power supply IC 180 generates a mobile phone power supply and a FeliCa IC power supply from the battery pack 170, and supplies them individually to each unit of the mobile phone 100 and the FeliCa IC module 190. The power supply IC 180 also includes a voltage conversion interface (IF) 180a for connecting the control unit 110 of the mobile phone 100 having a different operating voltage and the FeliCa IC module 190. Between the control unit 110 and the FeliCa IC module 190 via the IF 180a. Connect the control line.

  The FeliCa IC module 190 accesses data and data with the external reader / writer 200. The FeliCa IC card is a resin card with a built-in non-volatile memory and wireless communication chip. Data can be exchanged just by holding it over a reader. The FeliCa IC module 190 is a module obtained by making this FeliCa IC card into a chip. The FeliCa IC module 190 receives power by radio waves transmitted from the external reader / writer 200 and accesses data. The FeliCa IC module 190 does not have a battery power supply and receives the supply of FeliCa IC power from the power supply IC 180.

  Hereinafter, the operation of the mobile terminal device configured as described above will be described.

  The FeliCa IC module 190 mounted as a non-contact IC function in the mobile phone 100 has the following four mode functions (1) to (4).

(1) Wireless card function This is a function in which the mobile phone 100 operates as a FeliCa card and communicates with the external reader / writer 200 via the FeliCa system. This function is effective when a carrier wave from the external reader / writer 200 is detected and activated. Since it operates independently of the mobile phone 100, control from the control unit 110, which is a host CPU, is unnecessary. The mobile phone 100 operates even if the power supply is not ON.

(2) Wired communication function This is a function in which the control unit 110 of the mobile phone 100 accesses the service memory in the FeliCa IC module 190 through a wired interface (for example, UART). There is no external access.

(3) Three-party communication function This function performs communication between the control unit 110 of the mobile phone 100 and the external reader / writer 200. The control unit 110 of the mobile phone 100 executes application software, and exchanges various data between the external reader / writer 200 using the FeliCa function.

(4) Reader / Writer Function This is a function in which the mobile phone 100 operates as a reader / writer.

  Among the mode functions (1) to (4), the one that requires protection is (1) the wireless card function. Since this wireless card function is activated by detecting a carrier wave from the external reader / writer 200, there is a possibility of data leakage due to unauthorized access. For example, when the external reader / writer 200 is skimming from outside such as a bag by an unauthorized user, the FeliCa IC module 190 may be operated by the unauthorized external reader / writer 200 to read and rewrite data.

  FIG. 2 is a table showing the relationship between the battery voltage and the FeliCa operable state. In FIG. 2, LVA (low battery alarm voltage) is the lower limit (about 3.2 V) of the operating voltage of the mobile phone 100. Further, assuming that the lower limit of the operating voltage of the FeliCa IC module 190 is 2.8 V and the voltage drop of the regulator in the power supply IC 180 is 0.1 V, the battery voltage determination value is set to the above LAV and 2.9 V. Moreover, it does not depend on the ON / OFF state of the power supply on the mobile phone 100 side.

  As shown in the table of FIG. 2, when the battery voltage is higher than the operable state LVA (including battery installation and external power supply), all functions (wireless card function, wired communication function, three-way communication function, reader / Writer function) is operable.

  When the battery voltage is less than LVA and more than 2.9V, the FeliCa IC power supply is output and only the wireless card function is operable, and the wired communication function is not activated.

  When 2.9V or less and battery is not installed, all functions are disabled.

  The wireless card function and the wired communication function are not operated in a state where no battery is attached and external power is supplied. This is intended to unify the specifications for the user to stop the operation as a mobile phone system when there is no battery.

  In the present embodiment, when the battery voltage is 2.9 V or more at which the FeliCa IC module 190 operates, the power supply of the FeliCa IC module 190 is automatically turned off depending on the usage status of the mobile phone 100.

  FIG. 3 is a flowchart showing a non-contact IC security control operation for detecting the tilt of the mobile phone 100 and turning on / off the power of the FeliCa IC module 190, and is repeatedly executed by the CPU of the control unit 110 at a predetermined timing. In the figure, S indicates each step of the flow.

  This flow starts when the battery pack 170 having a battery capacity is mounted (step S1), and the battery voltage of the battery pack 170 is detected in step S2. When the battery voltage is equal to or higher than the lower limit (3.2 V) of the operating voltage of the mobile phone 100, all functions (wireless card function, wired communication function, three-way communication function, reader / writer function) can be operated. The power source of the mobile terminal device 100 can be turned on / off (step S3). When the voltage is 2.9 V or more and less than 3.2 V, the FeliCa IC power supply is output from the power supply IC 180 and only the wireless card function by the FeliCa IC module 190 is operable. The power source of the mobile terminal device 100 is OFF and the wired communication function is not operated (step S4). In this case, power supply OFF of the mobile terminal device 100 is power supply OFF to the communication function unit as the mobile phone of the mobile phone 100 and the wired communication function unit, and the energization to the control unit 110 for executing this flow Is kept. In order to save power consumption, the execution timing of this flow is preferably as small as possible.

  When the voltage is less than 2.9 V, the power source of the mobile phone 100 is turned off in step S5, and the power source of the FeliCa IC module 190 is also turned off in step S6. That is, when the voltage is less than 2.9 V, the functions of all the mobile phones 100 including the FeliCa IC module 190 are not operated. When the voltage is less than 2.9 V, the power supply to the FeliCa IC module 190 is turned off, so that no data leaks due to unauthorized access.

  In step S3 or step S4, the FeliCa IC module 190 receives power supply for the FeliCa IC from the power supply IC 180 independently of ON / OFF of the power supply of the mobile phone 100 main body. For this reason, it is in a state of receiving access from the external reader / writer 200 and there is a possibility of data leakage due to unauthorized access.

  In step S7, it is determined whether or not the non-contact IC security control is set. If the non-contact IC security control is not set, the FeliCa IC power supply to the FeliCa IC module 190 is continued in step S8 ( FeliCa IC power supply is turned on) and the process returns to step S2.

  If non-contact IC security control is set in step S7, it is determined in step S9 whether or not the mobile phone 100 main body is in a horizontal state based on the tilt detection output from the tilt sensor 160. Normally, the user of the mobile phone 100 performs FeliCa system communication with the external reader / writer 200 by holding the main body by hand and holding the main body 100 in a horizontal direction with respect to the external reader / writer 200. That is, the external reader / writer 200 reads information of a non-contact IC (here, the FeliCa IC module 190) in the horizontal direction with respect to the mobile phone 100 main body. On the other hand, mobile phone 100 often moves in a pocket or bag. In this case, the main body of the mobile phone 100 is generally in the vertical direction (non-horizontal direction). Therefore, when the mobile phone 100 main body is tilted and is not in a horizontal state, it is not assumed that the user uses the wireless card function, and the wireless card function by the FeliCa card may be stopped.

  In step S9, the tilt sensor 160 detects the tilt of the mobile phone 100 main body, and when the mobile phone 100 main body is in a horizontal state, the FeliCa IC power supply to the FeliCa IC module 190 is continued in step S10 (for FeliCa IC use). The power is turned on) and the process returns to step S2. When the mobile phone 100 main body is not in the horizontal state in the step S9, the FeliCa IC power supply to the FeliCa IC module 190 is cut off (FeliCa IC power supply OFF) in step S11, and the process returns to the step S2. Thus, in conjunction with the tilt of the mobile phone 100, the power supply to the FeliCa IC module 190 is turned on / off.

  As described above, according to the present embodiment, mobile phone 100 includes FeliCa IC module 190 that performs non-contact communication with external reader / writer 200, and tilt sensor 160 that detects the tilt of mobile phone 100 main body. And a power supply IC 180 that individually supplies power to the mobile phone 100 main body and the FeliCa IC module 190. The control unit 110 is configured so that the mobile phone 100 main body is inclined in the horizontal direction (the mobile phone 100 is connected to the external reader / writer 200). When the user is tilting more than a predetermined position, the user determines that the user is not using the FeliCa IC module 190 and performs non-contact IC security control for stopping the power supply to the FeliCa IC module 190. Use the non-contact IC function when the mobile phone 100 is put in the back or pocket. Under such circumstances, the operation of the FeliCa IC module 190 is stopped. This eliminates the possibility of an unauthorized user performing a secret communication operation with the non-contact IC function unit from outside, such as back, and stealing information by skimming, thereby preventing unauthorized use of the non-contact IC function by an unauthorized user. Can be prevented. Therefore, security can be improved without impairing the convenience of the user, and unauthorized use by a third party can be prevented.

(Embodiment 2)
The hardware configuration diagram of the mobile terminal device according to the second embodiment of the present invention is the same as that shown in FIG.

  FIG. 4 is a flowchart showing a non-contact IC security control operation of the mobile terminal device according to the second embodiment of the present invention. Steps that perform the same processing as the flow shown in FIG. 3 are given the same step numbers.

  This flow starts when the battery pack 170 having a battery capacity is mounted (step S1), and the battery voltage of the battery pack 170 is detected in step S2. When the battery voltage is equal to or higher than the lower limit (3.2 V) of the operating voltage of the mobile phone 100, all functions (wireless card function, wired communication function, three-way communication function, reader / writer function) can be operated. The power source of the mobile terminal device 100 can be turned on / off (step S3). When the voltage is 2.9 V or more and less than 3.2 V, the FeliCa IC power supply is output from the power supply IC 180 and only the wireless card function by the FeliCa IC module 190 is operable. The power source of the mobile terminal device 100 is OFF and the wired communication function is not operated (step S4). In this case, power supply OFF of the mobile terminal device 100 is power supply OFF to the communication function unit as the mobile phone of the mobile phone 100 and the wired communication function unit, and the energization to the control unit 110 for executing this flow Is kept. In order to save power consumption, the execution timing of this flow is preferably as small as possible.

  When the voltage is less than 2.9 V, the power source of the mobile phone 100 is turned off in step S5, and the power source of the FeliCa IC module 190 is also turned off in step S6. That is, when the voltage is less than 2.9 V, the functions of all the mobile phones 100 including the FeliCa IC module 190 are not operated. When the voltage is less than 2.9 V, the power supply to the FeliCa IC module 190 is turned off, so that no data leaks due to unauthorized access.

  In step S3 or step S4, the FeliCa IC module 190 receives FeliCa power supply from the power supply IC 180 independently of ON / OFF of the power supply of the mobile phone 100 main body. For this reason, it is in a state of receiving access from the external reader / writer 200 and there is a possibility of data leakage due to unauthorized access.

  In step S7, it is determined whether or not the non-contact IC security control is set. If the non-contact IC security control is not set, the FeliCa IC power supply to the FeliCa IC module 190 is continued in step S8 ( FeliCa IC power supply is turned on) and the process returns to step S2.

  If non-contact IC security control is set in step S7, it is determined in step S9 whether or not the mobile phone 100 main body is in a horizontal state based on the tilt detection output from the tilt sensor 160.

  When the mobile phone 100 main body is not in the horizontal state in the step S9, the FeliCa IC power supply to the FeliCa IC module 190 is cut off (FeliCa IC power supply OFF) in step S11, and the process returns to the step S2.

  On the other hand, when the mobile phone 100 main body is in a horizontal state in step S9, the FeliCa IC power supply to the FeliCa IC module 190 is continued (FeliCa IC power supply ON) in step S10, and a timer is started in step S21. And time a certain time. Next, after counting a certain time in step S22, the FeliCa IC power supply to the FeliCa IC module 190 is cut off (FeliCa IC power supply OFF), and the process returns to step S2. In this way, even when the mobile phone 100 main body is in a horizontal state, the power supply for the FeliCa IC is turned off after a certain period of time. The predetermined time is a time until FeliCa communication is completed (for example, a few seconds).

  As described above, according to the present embodiment, the power supply to FeliCa IC module 190 is turned on / off in conjunction with the tilt of mobile phone 100, so that the convenience of the user is the same as in the first embodiment. Security can be improved without impairing performance, and unauthorized use by a third party can be prevented.

  In this embodiment, according to the determination result, the power supply to the FeliCa IC module 190 is stopped after a certain period of time has elapsed since the power supply to the FeliCa IC module 190 has elapsed. Anti-use effect can be expected. Here, when the FeliCa IC module 190 is used, the mobile phone 100 main body may be once swung horizontally and vertically.

  In this embodiment, the example in which the power supply to the FeliCa IC module 190 is stopped after a lapse of a fixed time has been described. However, in addition to or instead of this control, the time until the FeliCa communication is completed is turned on and completed. It can also be turned off later, and the same security improvement effect can be obtained.

(Embodiment 3)
In the first and second embodiments, the example in which the host CPU of the mobile phone performs the non-contact IC security control operation has been described. The non-contact IC security control may be performed by an intelligent power supply IC having a control function. This example will be described below with reference to the third embodiment.

  FIG. 5 is a block diagram showing a schematic configuration of the portable terminal device according to the third embodiment of the present invention. The same components as those in FIG. 1 are denoted by the same reference numerals, and description of overlapping portions is omitted.

  In FIG. 5, the mobile phone 100A includes a control unit 110A, a storage memory 120, an input unit 130, a display unit 140, a wireless communication unit 150, a tilt sensor 160, a battery pack 170, an intelligent power supply IC 300, and a FeliCa IC module 190. Composed. The FeliCa IC module 190 accesses data with the external reader / writer 200.

  The intelligent power supply IC 300 includes a function as a power supply IC that generates a power supply voltage, and a control unit 310 including a microprocessor and the like, and the control unit 310 executes power supply voltage supply control. The intelligent power supply IC 300 also includes a voltage conversion interface (IF) 300a for connecting the control unit 110A of the mobile phone 100A having a different operating voltage and the FeliCa IC module 190. The control unit 110A and the FeliCa IC module 190 are connected via the IF 300a. Connect the control lines between them.

  In the present embodiment, the inclination detection result of the inclination sensor 160 is input to the intelligent power supply IC 300, and the control unit 310 of the intelligent power supply IC 300 executes non-contact IC security control.

  The non-contact IC security control by the control unit 310 of the intelligent power supply IC 300 is almost the same as the flow of FIGS. However, in the first and second embodiments, energization to the control unit 110 for executing the flow is actually maintained even when the mobile phone 100 main body is turned off. In the present embodiment, since control unit 310 of intelligent power supply IC 300 performs power ON / OFF control, the main body power supply of mobile phone 100A can be completely turned OFF.

  Therefore, according to the present embodiment, the intelligent power supply IC 300 turns on / off the power supply to the FeliCa IC module 190 in conjunction with the inclination of the mobile phone 100A. Security can be improved without impairing user convenience, and unauthorized use by a third party can be prevented. In the present embodiment, the power source of mobile phone 100A can be completely turned off. Since the control unit 310 of the intelligent power supply IC 300 has lower power consumption than the control unit 110A of the mobile phone 100A, a power saving effect can be expected even when the main body function of the mobile phone 100A is not used.

  The above description is an illustration of a preferred embodiment of the present invention, and the scope of the present invention is not limited to this. For example, an example in which the present invention is applied to a mobile phone as a mobile terminal device has been described. However, the present invention is not limited to a mobile phone, and is not limited to a mobile information terminal such as a PDA (Personal Digital Assistants), The present invention is applicable to a machine, a personal computer, or a fusion apparatus thereof.

  Further, although the FeliCa IC module has been described as an example of the non-contact IC function, it may be other than the FeliCa IC system, and can be applied to all non-contact IC functions that can be mounted on a portable terminal device.

  1 to 5 are merely examples, and any configuration and operation example may be used. For example, another sensor such as a light amount sensor may be used instead of the tilt sensor. In addition, when the mobile phone 100, 100A is held over the external reader / writer 200, it is generally assumed that the mobile phone 100, 100A is held horizontally over the external reader / writer 200. Needless to say, it may be tilted.

  In the present embodiment, the names of the mobile terminal device and the mobile phone are used. However, this is for convenience of explanation, and it goes without saying that the mobile terminal, a power supply control method, and the like may be used.

  Furthermore, the type, number, connection method, and the like of each circuit unit constituting the mobile phone, such as a power supply IC, are not limited to the above-described embodiments.

  Moreover, the portable terminal device demonstrated above is implement | achieved by the program for functioning this portable terminal device other than an electronic circuit. This program is stored in a computer-readable recording medium.

  The mobile terminal device according to the present invention is useful for mobile terminal devices such as mobile phones with a non-contact IC function, and portable electronic devices. Further, it can be incorporated in an electronic device such as a mobile phone as a power supply control program.

1 is a block diagram showing a schematic configuration of a mobile terminal device according to a first embodiment of the present invention. The figure which shows the relationship between the battery voltage of the portable terminal device which concerns on the said Embodiment 1, and FeliCa operation | movement possible state as a table | surface. The flowchart which shows the non-contact IC security control operation which turns ON / OFF the power supply of the FeliCa IC module of the portable terminal device which concerns on the said Embodiment 1. The flowchart which shows the non-contact IC security control operation which turns ON / OFF the power supply of the FeliCa IC module of the portable terminal device which concerns on Embodiment 2 of this invention The block diagram which shows schematic structure of the portable terminal device of Embodiment 3 of this invention.

Explanation of symbols

100, 100A mobile phone (mobile terminal device)
110, 110A, 310 Control unit 120 Storage memory 130 Input unit 140 Display unit 150 Wireless communication unit 160 Tilt sensor 170 Battery pack 180 Power supply IC
190 FeliCa IC module 200 External reader / writer 300 Intelligent power supply IC

Claims (5)

Non-contact communication means for performing non-contact communication with an external reader / writer;
A detecting means for detecting the use state of the user;
Power supply means for individually supplying power to the apparatus main body and the non-contact communication means;
Control means for stopping power supply to the non-contact communication means when it is determined that the user is not in use of the non-contact communication means based on the detected use status information of the user. Terminal device.   The detection means includes an inclination sensor that detects the inclination of the apparatus main body, a light amount sensor that detects a change in the amount of light at the outer peripheral portion of the apparatus main body, a contact sensor that detects contact with the apparatus main body, and a temperature change at the outer peripheral portion of the apparatus main body. The portable terminal device according to claim 1, which is at least one of temperature sensors for detecting the temperature, or a combination of these sensors. The detection means is an inclination sensor that detects an inclination of the apparatus main body,
When the inclination of the apparatus main body detected by the inclination sensor is more than a predetermined inclination relative to the external reader / writer than the inclination over which the apparatus main body is held for reading / writing, the control means The portable terminal device according to claim 1, wherein power supply to the contact communication unit is stopped.   2. The portable terminal device according to claim 1, wherein the control unit stops the power supply to the non-contact communication unit when a predetermined time elapses after the power supply to the non-contact communication unit is supplied according to the determination result. 2. The control unit stops power supply to the non-contact communication unit when exchange with the external reader / writer is completed after power supply to the non-contact communication unit is completed according to the determination result. Mobile terminal device.

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