JP5158504B2 - Portable electronic devices - Google Patents

Description

  The present invention relates to a portable electronic device capable of function restriction.

  In recent years, in order to prevent unauthorized use by a malicious third party, there have been many mobile phones having a function restriction function based on password input.

  For example, in Patent Document 1, when a folder type mobile phone is changed from a closed state to an open state, a password input is requested from the keyboard, and after the password is input from the keyboard, the mobile phone detects the open state. A technology is disclosed that does not require a password input again during

There are also mobile phones that perform function restrictions such as key lock without relying on password input.
For example, Patent Document 2 discloses a technique of detecting a tilt of a mobile phone using a triaxial acceleration sensor and automatically locking a key when a certain tilt is detected.
JP 2001-217924 A JP 2002-199443 A

  However, according to the technique disclosed in Patent Document 1 described above, when a mobile phone is used, in order to release the lock, user operations such as long key presses and password input increase, which imposes a heavy burden on the owner. .

Further, according to the technique disclosed in Patent Document 2, although the operation burden on the owner is reduced, a certain inclination is detected and key lock is automatically performed.
For this reason, the posture of using the mobile phone is fixed. For example, when the mobile phone is lying down, the key lock is reached and the mobile phone cannot be used.

  An object of the present invention is to provide a portable electronic device that can reduce use by a third party without imposing a burden on an owner.

In order to solve the above-described problems, a portable electronic device according to the present invention is a portable electronic device capable of function restriction, and is arranged in a housing and the housing, and changes in position or rotation angle of the housing. A state change detection unit configured to detect a state change including at least one; a storage unit configured to store first information which is release information of the function restriction; and third information indicating a predetermined state change; The input detection unit capable of accepting an input, the first information stored in the storage unit, and the second information based on the external input received by the input detection unit are compared, and if they match, the function A controller that releases the restriction and continues the function restriction in the case of a mismatch, wherein the controller is configured such that the second information based on the external input received by the input detector is the first information. When they match, the external input starts. The state change is detected by the state change detection unit within a predetermined period until the are stored in the storage unit as the third information, when the input detection unit accepts the external input, the storage unit The stored third information is compared with the fourth information based on the state change detected by the state change detection unit immediately before the external input is received, and the function restriction is released if they match. .

  In the portable electronic device of the present invention, the control unit compares the first information and the second information when the third information and the fourth information do not match, and If the function restriction is canceled and there is a mismatch, the function restriction may be continued.

  In the portable electronic device of the present invention, the external input reception detected by the input detection unit may be state change information detected by the state change detection unit.

  Moreover, the portable electronic device of this invention WHEREIN: The said state change detection part may be an acceleration sensor which can measure the acceleration of an axial direction, and the angular acceleration around each axis | shaft.

In the portable electronic device of the present invention, the control unit may be configured based on the third information when the second information based on the external input received by the input detection unit matches the first information. And
The third state change information stored in the storage unit may be updated to the latest information.

  In the portable electronic device of the present invention, the control unit includes predetermined character / symbol information and second state change information that is information of a drawing trajectory of the predetermined character / symbol information. The function restriction is released when the state change detection unit detects that the function restriction operation has been performed by the drawing trajectory of the predetermined character or symbol in the air.

  In the portable electronic device of the present invention, when the control unit releases the function restriction, the storage unit includes drawing information based on a character symbol detected by the state change detection unit. The first function restriction among the function restrictions is released, and in addition to the drawing information, the first state change information based on the drawing locus detected by the state change detection unit, and the storage When the second state change information stored in the unit matches, the first function restriction and the second function restriction are released.

The portable electronic device of the present invention includes a communication unit and a display unit, and the storage unit includes:
Personal information that can be displayed on the display unit is stored, and the control unit is configured to limit the first function restriction for restricting transmission / reception of information by the communication unit, and the first function for restricting display of personal information on the display unit. The second function restriction is controlled.

  In the portable electronic device of the present invention, the personal information includes at least one of mail received by the communication unit, a history of calls made via the communication unit, and user profile information.

  According to the portable electronic device of the present invention, it is possible to reduce use by a third party without any burden on the owner.

  FIG. 1 is a diagram showing an example of an external structure of a mobile terminal according to Embodiment 1 of the present invention. Here, a foldable mobile phone 10 is illustrated as a portable electronic device.

  As shown in FIG. 1, the mobile phone 10 includes an upper housing 101, a lower housing 102, and a hinge unit 103.

  FIG. 1A is a diagram showing a state in which the mobile phone 10 is opened (open state), and FIG. 1B is a diagram showing a state in which the mobile phone 10 is folded (closed state). .

As shown in FIG. 1A, the display unit 14 is disposed on the upper casing 101 on one side that is not exposed to the outside when the cellular phone 10 shown in FIG. 1B is closed.
In the lower housing 102, an operation unit (input detection unit) 12 is disposed on one surface that is not exposed to the outside in the closed state of the mobile phone 10 shown in FIG.
In the lower housing 102, for example, a six-axis acceleration sensor 15 (input detection unit, state change detection unit) that detects the orientation of the upper housing 101 and the lower housing 102 is further mounted. Details of the acceleration sensor 15 will be described later.

The hinge portion 103 opens and closes the upper housing 101 and the lower housing 102, and allows the transition between the open state of the mobile phone 10 shown in FIG. 1 (a) and the closed state shown in FIG. 1 (b). It is a hinge mechanism which has.
The open / closed state of the mobile phone 10 is monitored by a built-in control unit (not shown), and the control unit, which will be described later, can detect the open / closed state of the mobile phone 10.
Specifically, the control unit detects a closed state by monitoring whether or not a detection switch (not shown) of the lower casing 102 is pressed by a projection (not shown) disposed on the upper casing 101, for example.
In other words, the control unit determines that the detection switch is in the closed state if it is pressed, and the open state if it is not pressed.
The open / close detection is not limited to the switch, and may be various sensors.

FIG. 2 is a block diagram showing the internal configuration of the electrical system of the portable electronic device (mobile phone 10) according to the embodiment of the present invention.
As shown in FIG. 2, the mobile phone 10 includes a communication unit 11, an operation unit 12, a voice CODEC (COder DECorder) unit 13, a display unit 14, an acceleration sensor 15, a storage unit 16, and a control unit. 17.

  The communication unit 11 captures a wireless communication system, performs wireless communication with a base station (not shown) connected to the communication network, and transmits and receives various data. The various data includes voice data during a voice call, mail data during mail transmission / reception, page data during web browsing, and the like.

The operation unit 12 includes keys to which various functions are assigned, such as a power key, a call key, a numeric key, a character key, a direction key, a determination key, a call key, and a function key.
When these keys are operated by the owner, the operation unit 12 generates a signal corresponding to the operation content and outputs the signal to the control unit 17 as an instruction of the owner.
Here, it is assumed that the operation unit 12 receives an operation input such as a function release key.

The audio CODEC unit 13 performs input / output processing of an audio signal output from the speaker 131 and an audio signal input from the microphone.
That is, the sound input from the microphone 132 is amplified, subjected to analog-to-digital conversion, further subjected to signal processing such as encoding, converted into digital sound data, and output to the control unit 17.
The audio CODEC unit 13 performs signal processing such as decoding, digital-analog conversion, and amplification on the audio data supplied from the control unit 17, converts the audio data into an analog audio signal, and outputs the analog audio signal to the speaker.

The display unit 14 is configured by arranging a large number of pixels (a combination of light emitting elements of a plurality of colors) vertically and horizontally, for example, an LCD (Liquid Crystal Display Device) or an organic EL (Electro-Luminescence).
The main display 141 and the sub display configured by using the are included.
The display unit 14 displays an image corresponding to display target data such as a document generated by the control unit 17 and written in a predetermined area (VRAM area) of the storage unit 16.
The display unit 14 is, for example, a telephone number of a transmission destination at the time of wireless transmission by the communication unit 11, a telephone number of a transmission source at the time of incoming call, contents of received mail or transmitted mail, web page, date, time, remaining battery power, outgoing Display success / failure, document, standby screen, etc.

The acceleration sensor 15 is mounted on the mobile phone 10, for example, in the lower housing 102, and is composed of at least one of the position or rotation angle of the upper housing 101 and the lower housing 102 (hereinafter collectively referred to as the housing 100). Detect change information.
As a detection method of the acceleration sensor, there are a capacitance type that detects acceleration as a change in capacitance and a piezoresistive type.
Piezoresistive type is when a piezoresistive element formed on a silicon single crystal substrate by a semiconductor manufacturing process such as an ion implanter is subjected to tensile or compressive stress by mechanical external force, that is, when acceleration is applied. The inclination of the housing 100 is detected using the characteristic that the resistance value increases or decreases.

For example, in the case of a three-axis acceleration sensor, the posture (tilt with respect to the ground) is measured from the sum of X, Y, and Z acceleration vectors, and the tilt is the sum of the detected voltage due to the acceleration itself and the zero offset voltage). Detected. The zero offset voltage is a differential voltage from the reference voltage in a state where only acceleration due to gravity is applied and no acceleration is applied.
Recently, in addition to the X, Y, and Z3 axis accelerations, a 6-axis acceleration sensor that can measure angular accelerations around the X, Y, and Z axes has appeared, and the positions and rotation angles described below. Is measured accurately. For this reason, here, a 6-axis acceleration sensor is used as the acceleration sensor 15.

The storage unit 16 stores various data used for various processes of the mobile phone 10.
For example, a computer program executed by the control unit 17 is stored in the storage unit 16.
The storage unit 16 includes an address book for managing personal information such as the telephone number and e-mail address of the communication partner, a voice file for playing ringtones and alarm sounds, an image file for a standby screen, various setting data, Temporary data used in the process of the program is stored.
Here, in particular, the storage unit 16 stores in advance first information that is function restriction release information and third information that is state change information, as well as state changes detected by the acceleration sensor 15. The state change information based on is stored in a temporary sequence.

  The storage unit 16 includes, for example, a nonvolatile storage device (nonvolatile semiconductor memory, hard disk device, optical disk device, etc.), a random accessible storage device (eg, SRAM, DRAM), or the like.

The control unit 17 comprehensively controls the overall operation of the mobile phone 10.
That is, the control unit 17 performs various processes of the mobile phone 10 (voice calls performed via a circuit switching network, creation and transmission / reception of e-mail, browsing of the Internet Web (World Wide Web) site, etc.). The operation of each control block described above is controlled so as to be executed in an appropriate procedure according to the operation.
The control target of the control unit 17 is transmission / reception of signals in the communication unit 11, acquisition of operation input from the operation unit 12, voice input / output in the CODEC unit 13, image display on the display unit 14, tilt and acceleration from the acceleration sensor 15. Information acquisition, etc.
The control unit 17 includes a microprocessor that executes processing based on programs such as an operating system and application programs stored in the storage unit 16, and executes the above-described processing according to a procedure instructed by these programs. .
That is, the control unit 17 sequentially reads instruction codes from programs such as an operating system and application programs stored in the storage unit 16 and executes processing.

Here, in particular, the control unit 17 compares the first information stored in the storage unit 16 with the second information based on the external input received by the operation unit 12, and releases the function restriction if they match. To do. The first information is the information of "movement" that can be detected by the acceleration sensor 15, it may be an acceleration sensor instead of the operation unit 12 to detect the information of the "movement".
In addition to canceling the function restriction in the case of a mismatch, the control unit 17 receives the third information stored in the storage unit 16 and the second information when the operation unit 12 receives an external input corresponding to the second information. Compared with the fourth information based on the state change detected by the acceleration sensor 15 immediately before the information is received by the information, the function restriction is controlled to be released if they match.
The control unit 17 compares the first information and the second information when the third information and the fourth information do not match, and releases the function restriction when they match, and when they do not match, Continue to control the limit.
In addition, when the operation unit 12 receives an external input corresponding to the second information, the control unit 17 is detected by the acceleration sensor 15 within a predetermined period until the input of the second information starts. Control is performed to store the change information in the storage unit 16 as the third information.

  Note that, here, the operation unit 12 and the acceleration sensor 15 are described as existing independently, but the external input reception detected by the operation unit 12 is a state change detected by the acceleration sensor 15. May be.

Further, the above-mentioned “first information” refers to password information for releasing the key lock, and “second information” refers to password information input from the outside for releasing the key lock.
“Third information” refers to time-series information indicating the user's behavior immediately before the collation operation when the comparison between the first information and the second information is performed.
The “fourth information” is detected by the acceleration sensor 15 as the immediately preceding action when the key lock is to be released again while the third information is stored in the storage unit 16. Information indicating behavioral habits of a user within a predetermined period.
Specifically, the “fourth information” is, for example, “When the mobile phone 10 is put in the chest pocket, when taking the mobile phone 10, take it with the right hand and check the screen in front of the right arm. Time series information such as “use 10”.

The control unit 17 further cancels the function restriction when the acceleration sensor 15 detects that the function restriction operation has been performed based on the drawing trajectory of the character symbol in the air.
At this time, when releasing the function restriction, the control unit 17 releases the first function restriction among the function restrictions when the character-symbol drawing locus coincides, and the state information changes in addition to the drawing locus. If they match, the second function restriction is released.
Here, “first function restriction” means, for example, restricting transmission / reception of information by the communication unit 11.
“Second function restriction” refers to, for example, restricting display of personal information (mail received by the communication unit 11 or call history and user profile information performed via the communication unit 11) on the display unit 14. To do.

(Description of Example 1)
FIG. 3 is a flowchart showing an example of the operation of the portable electronic device (mobile phone 10) according to the embodiment of the present invention. Hereinafter, the operation of Example 1 of the portable electronic device according to the embodiment of the present invention will be described in detail with reference to the flowchart of FIG.

Here, description will be made assuming that key input by the operation unit 12 of the mobile phone 10 is in a key lock state locked by a predetermined operation by the owner (step S301 “Yes”).
The acceleration sensor 15 always measures the detected acceleration in the XYZ directions and the angular velocities around the XYZ axes (step S302).
The control unit 17 captures this at a predetermined sampling period and accumulates it as a behavior history of the owner of the mobile phone 10 in the log area of the storage unit 16 (step S303).
Note that the log area used at this time is used as a ring buffer from the viewpoint of capacity limitation under the control of the control unit 17.

In this state, in order to release the key lock, the owner performs a predetermined specific operation such as shaking the casing 100 several times in the vertical direction or continuously rotating the housing 100 several times in the left direction. Suppose you went.
At this time, the control unit 17 refers to the log area of the storage unit 16 to calculate the movement distance and the movement speed from the data regarding the acceleration in the XYZ directions and the angular velocity around each axis acquired by the acceleration sensor 15.
Then, the control unit 17 recognizes the action of shaking the casing 100 several times in the vertical direction or rotating the case 100 continuously several times in the left direction (step S304 “Yes”), thereby releasing the key lock. (Step S305).
If the logs do not match, the control unit 17 continues to control the key lock (step S306).

According to the first embodiment described above, for example, the movement (state change information) of the mobile phone 10 by the owner, such as “swing the mobile phone 10 twice and then rotate it several times”, is used as the unlock key. This makes imitation by a third party difficult, and even if the same movement is imitated, the mobile phone 10 can be moved at what speed, how far, at what angular speed, where. Since it is possible to determine whether the center of rotation is included or not, imitation is difficult.
In addition, since the owner of the mobile phone 10 has only to use “癖” when operating the mobile phone 10 as it is as an unlock key, the function restriction can be released with good reproducibility.

According to the first embodiment described above, the key lock is released using the user's behavior trap detected by the acceleration sensor 15 as a key. However, the operation unit 12 can input password information for releasing the key lock. Needless to say, the key lock can be similarly released when it is detected.
In the first embodiment, the operation unique to the owner is detected and the key lock is released. However, the key lock can be set by detecting the operation unique to the owner. . The unique operation in this case may be the same as or different from that when the key lock is released.

(Example 2)
FIG. 4 is a flowchart showing the operation of Example 2 of the portable electronic device (mobile phone 10) according to the embodiment of the present invention.

In order to release the lock, the flowchart of FIG. 4 further shows that “the mobile phone 10 is put in the chest pocket, the mobile phone 10 is taken with the right hand when the mobile phone 10 is taken, and the mobile phone 10 is checked in front of the right arm. An example of monitoring a series of action trajectories, such as “Use” is shown.
That is, an embodiment in which the risk of key leakage is avoided as much as possible by monitoring a series of action trajectories performed when the owner uses the mobile phone 10 will be described.
Hereinafter, the operation of the second example of the portable electronic device according to the embodiment of the present invention will be described in detail with reference to the flowchart of FIG.

As in the first embodiment, the operation unit 12 of the mobile phone 10 will be described as being in a key lock state in which the key is locked by a predetermined operation by the owner (step S401 “Yes”).
The acceleration sensor 15 constantly measures the acceleration in the XYZ directions and the angular velocities around the respective axes (step S402), and the control unit 17 captures them at a predetermined sampling period and owns them in the log area of the storage unit 16. It is accumulated as a person's action history (Step S403).
The log area used at this time is used as a ring buffer from the viewpoint of capacity.

In this state, in order to release the key lock, the owner performs a predetermined specific operation such as shaking the casing 100 several times in the vertical direction or continuously rotating the housing 100 several times in the left direction. Suppose that it went (step S404 "Yes").
At this time, the control unit 17 refers to the log area of the storage unit 16 to calculate the movement distance and the movement speed from the data regarding the acceleration in the XYZ directions and the angular velocity around each axis acquired by the acceleration sensor 15. The key lock is released by recognizing that the casing 100 has been shaken several times in the vertical direction or rotated continuously several times in the left direction. However, before that, the control unit 17 acquires the behavior trajectory of the owner by tracing back the log by a predetermined time according to the sampling interval (step S405).
Here, the predetermined period is an arbitrary time until the input of the password information starts when the operation unit 12 receives the password information (second information) input from the outside in order to release the key lock. Say.

That is, the control unit 17 refers to the log and immediately before the operation of unlocking the mobile phone 10 by the owner of the mobile phone 10, for example, the housing 100 may indicate that “the mobile phone 10 is put in the chest pocket and the mobile phone 10 is When picking up the telephone 10, it is determined whether or not an action trajectory has been drawn, such as “take the telephone 10 with the right hand and use the mobile phone 10 after confirming the screen in front of the right arm” (step S 406).
If the logs match (step S406 “Yes”), the key lock is released (step S407). If the logs do not match (step S406 “No”), the key lock operation is continued (step S408).
In addition, when the log regarding the action locus immediately before the above-described key lock release operation does not match, the user can also release the key lock by inputting password information for releasing the key lock. At this time, the control unit 17 compares the password information based on the external input received by the operation unit 12 with the password information for key lock release stored in the storage unit 16 in advance. Only if If they do not match, the key lock operation is continued.

According to the second embodiment described above, for example, “when the mobile phone 10 is placed in the breast pocket, the mobile phone 10 is taken with the right hand and the screen is checked in front of the right arm, then the mobile phone 10 is used.” The action trajectory immediately before the unlocking operation is detected by the acceleration sensor 15.
As a result, since a series of operations when using the mobile phone 10 can be used as a key for unlocking, it becomes difficult for a third party to realize that the function restriction is released. The risk of leakage can be further reduced.

In addition, the control unit 17 learns the user's behavior habit before canceling the function restriction as the third state change information. That is, the control unit 17 updates the action locus that can be said to be the user's habit immediately before the unique operation for releasing the key lock, and stores the updated behavior locus in the log area of the storage unit 16.
This allows the function restriction to be released when the trap is detected, and the user can use the mobile phone 10 without being aware of the function restriction release.
In addition, the user's behavior before canceling the function restriction is as follows: “When the mobile phone 10 is put in the right pocket of the trousers and the mobile phone 10 is picked up, lift it with the right hand and place the phone on the right ear. Make a phone call ”,“ when using the mobile phone 10, make a big call after the upper limit ”.
Any behavior can be detected by the acceleration sensor 15 (6-axis acceleration sensor).

(Example 3)
In the first embodiment and the second embodiment described above, the unique operation of the owner of the mobile phone 10 is used as a key for releasing the function restriction. However, in the third embodiment described below, the owner uses the mobile phone 10. It is assumed that the function restriction is released by drawing the trajectory of characters and symbols in the air.
In this case as well, as in the first and second embodiments, acceleration detection by the acceleration sensor 15 is required, and by adding a function restriction release function using characters and symbols, it becomes possible to use a password that is easy for the user to remember. .

In addition, when only the information of the characters and symbols match, the control unit 17 cancels the function restriction (first function restriction) for making and receiving calls, and in addition to the characters and symbols, When the movements also match, for example, the control is performed so that the reading of the address book and the received mail is also released (second function restriction). In other words, when the cellular phone 10 is used by another person who knows the characters and symbols, the other person can cancel the first function restriction, but the second function restriction whose key is the user's bag is to be released. I can't.
As a result, when lending the mobile phone 10 to a third party, it is possible to allow others to make and receive calls, and personal information such as an address book does not need to be understood by others, thus providing convenience to the user. .
Further, the same effect can be obtained even when the display unit 14 is used to control personal information that can be displayed. The personal information referred to here is a received mail received by the communication unit 11, a call history made by the communication unit 11, or user profile information.

As described above, according to the mobile electronic device according to the embodiment of the present invention, the key lock can be set or released by detecting the specific operation by the owner of the mobile phone 10 using the acceleration sensor. Since it can be performed without button operation, the operation load on the owner is reduced.
Further, by detecting the owner's behavior trajectory using an acceleration sensor, recognizing the owner's behavior as the owner of the mobile phone 10 and permitting the use, a third party cannot use the mobile phone 10.

Although only the mobile phone 10 is illustrated as the portable electronic device according to the above-described embodiment of the present invention, the present invention is not limited to the mobile phone 10 and can be similarly applied to PDA (Personal Digital Assistants), game machines, and the like. It is.
Further, although only the key lock is illustrated as the function limiting function, the present invention is not limited to the key lock but can be applied to various function limitations such as a card lock.

In addition, the functions of the constituent blocks included in the portable electronic device according to the embodiment of the present invention may be realized entirely by software, or at least a part thereof may be realized by hardware.
For example, the first information stored in the storage unit 16 and the second information based on the external input received by the operation unit 12 are compared, and the function restriction is released when they match, and the function when there is a mismatch When the restriction is released and the operation unit 12 receives an external input corresponding to the second information, the third information stored in the storage unit 16 and the external input corresponding to the second information are received. The data processing in the control unit 17 that compares the fourth information based on the external input detected immediately before by the acceleration sensor 15 and cancels the function restriction if they match is realized on the computer by one or more programs. Alternatively, at least a part of it may be realized by hardware.

It is a figure which shows an example of the external appearance structure of the portable electronic device which concerns on embodiment of this invention. It is a block diagram which shows the internal structure of the electric system of the portable electronic device which concerns on embodiment of this invention. It is a flowchart which shows operation | movement (Example 1) of the portable electronic device which concerns on embodiment of this invention. It is a flowchart which shows operation | movement (Example 2) of the portable electronic device which concerns on embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Mobile phone, 11 ... Communication part, 12 ... Input detection part, 13 ... CODEC part, 14 ... Display part, 15 ... State change detection part, 16 ... Memory | storage part, 17 ... Control part, 100 ... Case, 101 ... Upper housing 102, lower housing 103, hinge part

Claims (9)

A portable electronic device capable of function restriction,
A housing,
A state change detection unit that is disposed in the case and detects a state change consisting of at least one of a position change or a rotation angle change of the case;
A storage unit for storing first information which is release information of the function restriction and third information indicating a predetermined state change;
An input detector capable of accepting external input;
The first information stored in the storage unit is compared with the second information based on the external input received by the input detection unit, and the function restriction is released when they match, and when they do not match, A control unit that continues function restriction,
The controller is
When the second information based on the external input received by the input detection unit coincides with the first information, it is detected by the state change detection unit within a predetermined period until the input of the external input starts. The state change is stored in the storage unit as the third information,
When the input detection unit receives the external input, the third information stored in the storage unit and the fourth based on the state change detected by the state change detection unit immediately before the external input is received. The portable electronic device is characterized in that the function restriction is released when the information is matched. The controller is
If the third information and the fourth information do not match, the first information and the second information are compared, and if they match, the function restriction is released, and if they do not match, the function restriction The portable electronic device according to claim 1, wherein: The portable electronic device according to claim 1, wherein the external input reception detected by the input detection unit is state change information detected by the state change detection unit. The state change detection unit
The portable electronic device according to any one of claims 1 to 3, further comprising an acceleration sensor capable of measuring an acceleration in an axial direction and an angular acceleration around each axis. The controller is
Second information based on an external input by the input detection unit is received is the time that matches the first information, the based on the third information, the third state change information that will be stored in the storage unit The mobile electronic device according to claim 1, wherein the mobile electronic device is updated to the latest information. The storage unit
Predetermined character symbol information and
Second state change information which is information of a drawing trajectory of the predetermined character / symbol information, and the control unit includes:
The function restriction is released when the state change detection unit detects that a function restriction operation based on a drawing trajectory in the air of the predetermined character or symbol is performed. Item 6. The portable electronic device according to any one of Item 5. The controller is
In releasing the function restriction, when drawing information based on the character symbol detected by the state change detection unit matches the predetermined character symbol information of the storage unit, the first of the function restrictions The function restriction is released, and in addition to the drawing information, the first state change information based on the drawing trajectory detected by the state change detection unit matches the second state change information stored in the storage unit. When it does, the said 1st function restriction | limiting and 2nd function restriction | limiting are cancelled | released. The portable electronic device of Claim 6 characterized by the above-mentioned. A communication department;
A display unit,
The storage unit
Storing personal information that can be displayed on the display unit;
The controller is
8. The first function restriction for restricting transmission / reception of information by the communication unit and the second function restriction for restricting display of personal information on the display unit are controlled. Portable electronic devices. The personal information is
The portable electronic device according to claim 8, comprising at least one of mail received by the communication unit, a history of calls made via the communication unit, and user profile information.

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