JP5220507B2 - Mobile terminal device - Google Patents

Description

  The present invention relates to a portable terminal device that receives electromagnetic waves from a counterpart device.

For example, a communication standard such as FeliCa (registered trademark) for short-range wireless communication defines a test standard for a communication distance and a non-communication area, and defines the communication performance of the communication standard.
In order to satisfy this communication standard, a mobile terminal device with a short-range wireless communication function controls / adjusts a communication distance and a non-communication area by attaching a magnetic sheet inside the device, for example. Moreover, a precision grade inductor, capacitor, etc. are used for the circuit etc. which comprise the said apparatus, and sufficient operation accuracy is ensured and the communication standard is observed.

  In addition, the portable terminal device described above has a loop antenna for short-range wireless communication, and uses, for example, by adjusting a resonance frequency to suppress performance variations due to individual differences in the loop antenna. As described above, a portable terminal device having a short-range wireless communication function requires a great number of man-hours for countermeasures against malfunctions such as operation and performance evaluation at the design stage of the device.

In a portable terminal device having a short-range wireless communication function, for example, as described in Patent Document 1, two loop antennas are arranged at different positions, and communication with an external device using the short-range wireless communication function is performed. There is something that is done in a stable state.
In this portable terminal device, an acceleration sensor is arranged inside the casing, and the gravitational acceleration output from the acceleration sensor is used to distinguish whether the casing is facing upward or in an opposite state. The antenna is switched.

In addition, a portable terminal device having a short-range wireless communication function includes IC chips having a short-range wireless communication function on the front side and the back side of the portable terminal device as described in Patent Document 2, for example. There is.
By arranging the two IC chips in this way, short-range wireless communication can be reliably performed even when the portable terminal device is held over an external counterpart device.

JP 2006-211551 A JP 2007-110286 A

  In actual device design, in order to satisfy the short-range wireless communication standard, it is necessary to examine the type, attachment position, shape, etc. of the magnetic sheet. Also, in the resonant circuit, it is necessary to verify constants including the necessity of using precision class, the adjustment range and resolution of the resonant frequency adjustment circuit, etc., and a huge amount of design verification man-hours are required to find the optimum conditions. I need it. In the mass production process, a man-hour for adjusting the resonance frequency of the short-range wireless communication antenna is required. Thus, a lot of man-hours are spent so that the mobile terminal device can reliably receive electromagnetic waves such as near field communication.

  The present invention has been made in view of such circumstances, and an object thereof is to obtain a portable terminal device that clearly indicates to a user a position at which electromagnetic waves used for short-range wireless communication or the like can be reliably received. .

The mobile terminal device as the first aspect of the present invention includes a notification unit, and an electromagnetic wave receiving unit for receiving electromagnetic waves from the other side device, an acceleration sensor capable of detecting at least two or more axes acceleration before Symbol electromagnetic wave receiving with measuring a reception intensity of an electromagnetic wave in parts, before SL has a control unit that monitors the detection value of the acceleration sensor, wherein the control unit, the terminal itself is capable of receiving electromagnetic waves from the mating device triggered by entering the area, identify the positional relationship between the reception intensity of the current position and the electromagnetic wave is good location of the terminal based on the measurement history variations Do履 history and electromagnetic wave receiving intensity of the detected value of the acceleration sensor And the information which shows this positional relationship is alert | reported by the said alerting | reporting part.

  Preferably, the electromagnetic wave receiving unit includes a loop antenna for electromagnetic wave communication and an electromagnetic wave processing unit that extracts a communication signal from the electromagnetic wave received by the loop antenna and performs a predetermined process.

Preferably, the electromagnetic wave receiving unit receives an electromagnetic wave related to short-range wireless communication by the loop antenna.

Preferably, the electromagnetic wave receiving unit receives an electromagnetic wave related to contactless charging by the loop antenna.

Suitably, the said control part updates the position where the reception intensity | strength of the said electromagnetic wave is favorable based on the said electromagnetic wave reception intensity | strength after the start of the alerting | reporting at any time.

  ADVANTAGE OF THE INVENTION According to this invention, the portable terminal device which a user possesses can be guide | induced to an electromagnetic wave reception area | region, and electromagnetic wave reception can be performed suitably.

An embodiment of the present invention will be described below.
<First Embodiment>
FIG. 1 is a block diagram showing the configuration of the mobile terminal device according to the first embodiment of the present invention.
The illustrated mobile terminal device 1 includes an antenna 2 that performs data communication such as a call, a communication unit 3 that performs data communication such as a call using the antenna 2, a display unit 4 that displays communication contents, a voice input / output unit 5, It has a key operation unit 6 that allows the user to perform operations such as setting.

In addition, the mobile terminal device 1 includes a memory 7 that stores control data such as communication operations and calculation results, an electromagnetic wave receiving unit 8 that receives an electromagnetic wave emitted from an opposite device that is an external counterpart device, and A power source 9 is provided to supply power to each part of the portable terminal device.
In addition, the mobile terminal device 1 includes a control unit 10 that controls operations of the above-described units, a vibration notification unit 15, and a triaxial acceleration sensor 40.

  The electromagnetic wave receiving unit 8 is configured to perform non-contact type RFID communication with an external counterpart device (the counterpart device) (not shown). The loop antenna 11 and the near-field by electromagnetic wave communication using the loop antenna 11 are configured. It has an electromagnetic wave processing unit 8a that performs distance wireless communication. Note that the electromagnetic wave receiving unit 8 may be configured to be able to perform magnetic field communication with the above-described counter device. For example, the electromagnetic wave receiving unit 8 has a so-called IC card function having an electronic money settlement function by non-contact communication. You may comprise so that it may have.

The loop antenna 11 is an antenna used for short-distance magnetic field communication having a coil for transmitting and receiving electromagnetic waves, that is, a loop-shaped portion.
The electromagnetic wave processing unit 8a includes a control IC chip 12 that performs each process in accordance with a short-range wireless communication standard, and that performs a process of separating a communication signal or the like from the electromagnetic wave received by the loop antenna 11. Further, the electromagnetic wave processing unit 8a has a memory 13 for storing the communication signal and each data related to the communication. The electromagnetic wave processing unit 8a is, for example, an IC chip that includes the control IC chip 12 and the memory 13 and is configured to conform to a predetermined near field communication standard.

The IC chip 12 and the memory 13 are connected and configured to operate with electric power generated in the loop antenna 11 when receiving the electromagnetic wave from the above-mentioned counter device.
In addition, the IC chip 12 and the memory 13 are connected and configured so that they can be operated by power supplied from the power supply 9 of the mobile terminal device 1.
The vibration notification unit 15 is, for example, a vibrator configured to be vibrated under the control of the control unit 10. In addition, the vibration notification unit 15 is disposed at an appropriate portion inside the casing of the mobile terminal device 1 described later.

  FIG. 2 is an explanatory diagram showing the configuration of the mobile terminal device shown in FIG. This figure has shown an example of the external appearance of the portable terminal device 1 comprised as shown in FIG. The mobile terminal device 1 illustrated in FIG. 2 has a foldable casing 20. In addition, the housing shape of the portable terminal device 1 is not limited to a folding type.

FIG. 2 (A) shows the exterior when the housing 20 is viewed from the side, and shows each part provided inside, and FIG. 2 (B) shows the housing 20 when viewed from above. The external appearance and each part provided inside are shown through.
Note that FIG. 2A shows a state in which the folding housing 20 is slightly opened in order to make it easy to understand the arrangement and the like of each part.

The housing 20 includes a first housing 21 and a second housing 22, and a hinge portion 23 is provided at a connecting portion thereof, so that the cantilevered first housing 21 and the second housing 22 can be opened and closed. It is configured as follows.
Inside the first housing 21 is provided a substrate 30 that constitutes an electronic circuit or the like. A triaxial acceleration sensor 40 is mounted on the substrate 30 as part of an electronic circuit.
The triaxial acceleration sensor 40 is fixed to the first housing 21 via the substrate 30 and is on the plate surface of the substrate 30 and the back surface of the first housing 21 (the surface opposite to the second housing 22 in the folded state). Are arranged horizontally.

As shown in FIG. 2B, the three-axis acceleration sensor 40 is disposed in the central portion viewed from the back side of the first housing 21 or in the vicinity of the central portion.
For example, as shown in FIGS. 2 (A) and 2 (B), the triaxial acceleration sensor 40 has the lateral direction of the mobile terminal device 1 as the X axis, the longitudinal direction as the Y axis, and the thickness direction as the Z axis. When mounted, it is mounted on the substrate 30 so that acceleration in three directions along each axis can be detected.
Note that the acceleration sensor provided in the mobile terminal device 1 may be any sensor that detects at least accelerations in the biaxial directions of the X axis and the Y axis, for example.

The first casing 21 is provided with the key operation unit 6 of FIG. 1 and is electrically connected to an electronic circuit or the like configured on the substrate 30. The key operation unit 6 is provided on the inner surface of the first housing 21 in a state where the housing 20 is folded, that is, provided on the surface facing the second housing 22.
The second housing 22 includes a main display 4a and a sub display 4b, which are the display unit 4 of FIG.

  The main display 4 a is provided on the inner surface of the second housing 22 in a state where the housing 20 is folded, that is, provided on the surface facing the first housing 21. The sub display 4b is on the back side of the main display 4a, and is disposed on the outer surface of the second casing 22 that is exposed even in the folded state.

Moreover, the loop antenna 11 shown in FIG. 1 is provided inside the first housing 21. The loop antenna 11 is disposed on the back side of the first housing 21 in a state in which the folding housing 20 is folded.
The loop antenna 11 is disposed such that a portion forming a loop shape is horizontal with respect to the back surface of the first housing 21. Further, the loop-shaped portion is disposed so as to be horizontal with respect to the display surfaces of the main display 4a and the sub-display 4b provided in the second casing 22 in a state where the casing 20 is folded. Yes. That is, the loop antenna 11 is arranged so that the loop surface is parallel to the display surfaces of the displays 4a and 4b.

Further, as shown in FIG. 2B, the loop antenna 11 is provided so that the three-axis acceleration sensor 40 is disposed inside the loop shape when the first casing 21 is viewed from the back side. .
Furthermore, the loop antenna 11 is arranged so that the area surrounded by the loop-shaped part, the display surface of the main display 4a of the display unit 4 and the display surface of the sub display 4b overlap in the viewing direction of each display surface. It is installed.

Next, the operation will be described.
FIG. 3 is an explanatory diagram showing the operation of the mobile terminal device shown in FIG. This figure shows the mobile terminal device 1 and the counterpart device 20 that is a counterpart device that emits electromagnetic waves. When the mobile terminal device 1 receives an electromagnetic wave from the counterpart device 20, it shows each part that operates mainly. ing.

  First, the control unit 10 of the mobile terminal device 1 uses the detection value output from the triaxial acceleration sensor 40 to detect the acceleration, the moving speed, and the mobile terminal device 1 when the mobile terminal device 1 is moved. The operation for obtaining the position will be described.

FIG. 4 is an explanatory diagram showing the operation of the mobile terminal device shown in FIG. This figure shows an example of the change over time of the acceleration A detected by the triaxial acceleration sensor 40 shown in FIGS. 1 to 3 and the moving speed V and the position P obtained from the detection result of the triaxial acceleration sensor 40 by the control unit 10. ing.
The acceleration (A) is shown in the upper part (1) of FIG. 4, the moving speed V is shown in the middle part (2), and the position P is shown in the lower part (3).

Here, the value output from the triaxial acceleration sensor 40 is Ar, the elapsed time is t, and the time interval at which the control unit 10 inputs the output value of the triaxial acceleration sensor 40, that is, the input cycle is ΔT.
The controller 10 obtains the absolute value of the output value Ar of the triaxial acceleration sensor 40 as the initialization process 1 shown in FIG. At this time, the value output from the triaxial acceleration sensor 40 is Ar0. When the obtained absolute value | Ar0 | becomes the gravitational acceleration 1 [G], the moving speed V and the position P at this time are set to zero. : “V (t−ΔT) ← 0, P (t−ΔT) ← 0)”

  Here, the gravitational acceleration correction value G is set to the output value Ar0. : “G ← Ar0”

  As the process 2 for obtaining the acceleration A, the control unit 10 reads the output value Ar of the triaxial acceleration sensor 40 after a time interval ΔT and corrects the output value Ar read this time with the gravity acceleration correction value G to obtain the acceleration A. . : "A ← Ar-G"

  The control unit 10 calculates the moving speed V from the acceleration A obtained in the process 2 as the process 3 for obtaining the moving speed V. : “V = V (t−ΔT) + A × ΔT”

  As the process 4 for obtaining the position P, the control unit 10 calculates the position P using the acceleration A obtained in the process 2 and the moving speed V obtained in the process 3. : “X = X (t−ΔT) + V (t−ΔT) × ΔT + 1/2 × A × ΔT ^ 2”

  As the process 5, the control unit 10 stores the moving speed V obtained in the process 2 and the position P obtained in the process 3 in the memory or the memory 7 provided therein. Here, the operation when the moving speed V and the position P are stored in the memory 7 will be described as an example. When the movement speed V and the position P obtained as described above are stored in the memory 7, the contents of the past movement speed V and the position P stored in the memory 7 are updated.

  The control unit 10 uses the moving speed V and the position P updated and stored in the memory 7 when obtaining the moving speed V and the position P at the time when the next time interval ΔT has passed. : “V (t−ΔT) ← V, P (t−ΔT) ← P”

The control unit 10 repeats the processes 2 to 5 described above to obtain the acceleration A, the moving speed V, and the position P every predetermined period, that is, every time interval ΔT.
In addition, the X direction (short direction of the portable terminal device 1), the Y direction (longitudinal direction of the portable terminal device 1), and the Z direction (thickness direction of the portable terminal device 1) in which acceleration can be detected by the triaxial acceleration sensor 40. Of these, the moving speed V and the position P may be obtained based on acceleration in at least one direction. Preferably, the moving speed V and the position P based on each acceleration A in the X direction and the Y direction may be obtained.

  Next, an operation when the mobile terminal device 1 performs transmission / reception of electromagnetic waves or near field communication with the counterpart device will be described.

  FIG. 5 is a flowchart showing the operation of the mobile terminal device shown in FIG. This figure shows an operation when the mobile terminal device 1 receives an electromagnetic wave emitted from the opposite device 20 in the vicinity of the opposite device 20.

For example, when the user brings the mobile terminal device 1 close to the counter device 20, the electromagnetic wave receiving unit 8 of the mobile terminal device 1 receives an electromagnetic wave emitted from the counter device 20.
When the control unit 10 detects that the electromagnetic wave receiving unit 8 has received the above-described electromagnetic wave, the control unit 10 controls, for example, the sub-display 4b to display a message “still on the opposite device” (step ST101).
When the user stops the mobile terminal device 1 on the opposite device, the control unit 10 determines the absolute value | Ar | of the output value Ar of the triaxial acceleration sensor 40 as described as the operation process of the process 1 with reference to FIG. When gravitational acceleration becomes 1 [G], the contents to be described later stored in the memory 7 are initialized (step ST102).

Specifically, the output value Ar of the triaxial acceleration sensor 40 includes an output value Arx that is an acceleration in the X axis direction, an output value Ary that is an acceleration in the Y axis direction, and an output value Arz that is an acceleration in the Z axis direction shown in FIG. It is. The control unit 10 performs each process using the output values Arz, Ary, and Arz. That is, using an XYZ coordinate system, an output value Ar that is acceleration, a moving speed V described later, a position P of the mobile terminal device 1, and a position Q at which the electromagnetic wave reception intensity is maximized are expressed. Each calculation is performed using coordinate values. The coordinate system used by the control unit 10 is not limited to the above XYZ coordinate system.
In step ST102, the control unit 10 determines that the output values Arx, Ary, Arz from the triaxial acceleration sensor 40 are SQRT (Arx ^ 2 + Ary ^ 2 + Arz ^ 2) = 1. Is determined to be stationary above the opposite machine 20.
Next, the control unit 10 initializes each content stored in the memory 7.
This initialization is performed, for example, as in the following (a) to (g). Note that each process illustrated here is a processing operation for only the X-axis and the Y-axis for the sake of simplicity of explanation, and the process related to the Z-axis is omitted.

(A) Initial position P0 (X (t−ΔT), Y (t−ΔT)) = (0, 0) of the mobile terminal device 1
(B) Initial velocity V0 (Vx (t−ΔT), Vy (t−ΔT)) = (0, 0) of the mobile terminal device 1
(C) Current position P (X, Y) = (0, 0) of the mobile terminal device 1
(D) Movement speed V (Vx, Vy) of the mobile terminal device 1 = (0, 0)
(E) Maximum value of received electromagnetic wave intensity Smax = 0
(F) Position Q (Xmax, Ymax) = (0, 0) where received electromagnetic wave intensity is maximum
(G) Correction value G (Gx, Gy, Gz) for canceling the gravitational acceleration = (Arx, Ary, Arz)

  The maximum value Smax of the electromagnetic wave reception intensity is an electromagnetic wave reception intensity at which the electromagnetic wave reception unit 8 can be satisfactorily received. The position Q at which the electromagnetic wave reception intensity is maximum is an electromagnetic wave at which the electromagnetic wave reception unit 8 is good. This is the position where the electromagnetic wave can be received with the received intensity.

The control unit 10 controls, for example, the sub-display 4b of the display unit 4 to urge the user to move the mobile terminal device 1 in the vicinity of the opposing device. For example, “draw the circle of the mobile terminal device 1 on the opposing device. "Please move it like""is displayed (step ST103).
The control unit 10 causes the display unit 4 to display the message as described above, and reads the electromagnetic wave reception intensity S received by the electromagnetic wave reception unit and the output values Arx and Ary of the three-axis acceleration sensor 40 at a time interval of ΔT. (Step ST104).
The control unit 10 uses the accelerations Ax and Ay that cancel the influence of the gravitational acceleration from the output values Arx and Ary, and sets the movement speed V of the mobile terminal device 1 and the position P of the mobile terminal device 1 to the following (h) to ( The calculation is performed as shown in j) (step ST105).

(H) Acceleration A (Ax, Ay) of portable terminal device 1 = (Arg−Gx, Ary−Gy)
(I) Movement speed V (Vx, Vy) of the mobile terminal device 1 = (Vx (t−ΔT) + Ax · ΔT, Vy (t−ΔT) + Ay · ΔT)
(J) Position P (X, Y) = (Vx (t−ΔT) · ΔT + 1/2 · Ax · ΔT ^ 2, Vy (t−ΔT) · ΔT + 1/2 · Ay · ΔT ^ 2 of the portable terminal device 1 )

  The control unit 10 compares the electromagnetic wave reception intensity S received by the electromagnetic wave reception unit 8 with the maximum value Smax of the electromagnetic wave reception intensity (step ST106), and if S> Smax (step ST106 "Yes"), the memory 7 Is updated to the value of the electromagnetic wave reception intensity S. Further, the position Q where the electromagnetic wave reception intensity stored in the memory 7 is maximum is updated to the current position P of the portable terminal device 1 (step ST107). Thereafter, the process proceeds to step ST108.

  If S <Smax in the above comparison (step ST106 “No”), the maximum value Smax of the electromagnetic wave reception intensity and the position Q where the electromagnetic wave reception intensity is maximum stored in the memory 7 are held as they are. Proceed to step ST108.

  In this manner, the intensity of the electromagnetic wave received by the electromagnetic wave receiving unit 8 and the position P of the portable terminal device 1 obtained by the calculation as described above are associated with each other at every predetermined period, that is, time interval ΔT. To be stored in the memory 7. In other words, the electromagnetic wave reception intensity S and the position P of the mobile terminal device 1 are stored and saved based on the transition history in which the detection value of the acceleration sensor 40 measured at each time interval ΔT fluctuates and the measurement history of the electromagnetic wave reception intensity. .

  Then, the initial position P0 of the mobile terminal device 1 is updated to the current position P of the mobile terminal device 1, and the initial speed V0 of the mobile terminal device 1 is updated to the value of the moving speed V. The above moving speed V is set to V (t−ΔT) so that the moving speed V and the position P obtained in the above steps ST104 to ST107 are used in the processing after the next time interval ΔT has passed. Is stored in the memory 7 as P (t−ΔT) (step ST108).

After the process of step ST108 described above is processed, the process returns to the process of step ST104 described above, and the subsequent processes are similarly processed.
In the process of step ST104 described above, the time interval ΔT at which the control unit 10 takes in the electromagnetic wave reception intensity S from the triaxial acceleration sensor 40 is, for example, 100 [msec. ]. Each process after step ST104 is repeated at such a time interval ΔT.

Next, processing operations performed by the mobile terminal device 1 when the user moves the mobile terminal device 1 in the vicinity of the opposite device 20 will be described.
FIG. 6 is an explanatory diagram illustrating an operation of the mobile terminal device illustrated in FIG. 3. In this figure, the user has moved the mobile terminal device 1 above the opposite device 20 shown in FIG. 3 from the position P0 to the position P4 through the positions P1 to P3 as indicated by the broken arrows in the figure. At this time, an example of contents displayed on the mobile terminal device 1 at each position is shown.
FIG. 7 is a flowchart showing the operation of the mobile terminal device shown in FIG. This figure shows a processing operation that prompts the user to move the mobile terminal device 1 when the control unit 10 performs the operation shown in FIG.

The control unit 10 prompts the user to stop the mobile terminal device 1 by performing the display in the process of step ST101 in FIG. 5 at the position P0 shown in FIG. Perform initialization.
Subsequently, the control unit 10 performs display in the process of step ST103 in FIG. 5 to prompt the user to move the mobile terminal device 1. After performing this display, the control unit 10 waits for about 3 seconds, for example. That is, the blank time until the next processing operation is performed is set (step ST201).

  Alternatively, instead of setting the margin time, the control unit 10 detects that the position P of the mobile terminal device 1 that is sequentially obtained by calculation has moved, for example, 3 [cm] or more. Then, the processing operation for guiding the mobile terminal device 1 to the position Q where the electromagnetic wave reception intensity S is maximized is started. In the operation illustrated in FIG. 6, the above-described initialization is performed at the position P0, and the mobile terminal device 1 is moved to the position Ps to start guidance.

  When the electromagnetic wave receivable region is not found, the control unit 10 displays a message or the like that prompts the user to move the mobile terminal device 1 over the opposite device 20.

  The control unit 10 includes a flag indicating whether or not an electromagnetic wave receivable region is found. As described above, the control unit 10 obtains the electromagnetic wave reception intensity S of the electromagnetic wave at the time interval ΔT. For example, when the electromagnetic wave reception intensity S becomes larger than a predetermined value, or when the electromagnetic wave processing unit 8a confirms that the electromagnetic wave processing unit 8a separates the ACK from the electromagnetic wave transmitted from the counter device 20, or the control unit 10 checks the ACK, The above flag is made significant when an ACK is returned.

After processing the above-described step ST201, the control unit 10 determines whether or not the above flag is set (step ST202).
When it is determined that the flag is set (step ST202 “Yes”), the control unit 10 displays an arrow on the display unit 4 as information indicating the direction of the position Q where the electromagnetic wave reception intensity S is maximized from the current position P. It is displayed (step ST203).
That is, the triaxial acceleration sensor 40 with a predetermined period of the time interval ΔT during the period from the position P0 where the initialization is performed to the movement to the guidance start position Ps (when the blank time elapses or during movement of 3 cm or more). The memory 7 stores the position P based on the acceleration A and the moving speed V detected by, and the electromagnetic wave reception intensity S detected by the electromagnetic wave receiver 8 at the same period (timing). Then, the electromagnetic wave reception intensities S corresponding to the plurality of positions P stored in the memory 7 are respectively compared, and a position Q at which the electromagnetic wave reception intensity S is maximum is set based on the comparison result.

  In step ST203, the control unit 10 calculates the coordinate value of the current position P of the mobile terminal device 1 calculated based on the acceleration A and the moving speed V detected by the triaxial acceleration sensor 40, and the set position Q. Compare the coordinate value of. Then, based on the difference between the coordinate values calculated by comparison, the direction of the position Q where the electromagnetic wave reception intensity S with respect to the current position P is maximized is calculated, and an arrow based on the information indicating the direction of the position Q is displayed. Part 4 is displayed.

Note that the position P based on the acceleration A and the moving speed V detected by the triaxial acceleration sensor 40 at a predetermined period of the time interval ΔT is calculated during the period from the guidance start position Ps to the current position P. At the same time, the electromagnetic wave reception intensity S is detected by the electromagnetic wave receiving unit 8 at the same period (timing), and the electromagnetic wave reception intensity S detected during this period moves from the position P0 where the initialization is performed to the induction start position Ps. When the electromagnetic wave reception intensity S detected before is larger than the set position Q, the set position Q is updated as needed.
Therefore, the position Q is a position where the strongest electromagnetic wave reception intensity S is received while moving from the initialized position P0 to the current position P, and a direction indicating a position where the electromagnetic wave reception intensity S is maximum. It can be displayed on the display unit 4.

As described above, when the flag is significant, the position Q is included in the movement path so far.
For example, the control unit 10 causes the sub-display 4b of the display unit 4 to display the direction of the position Q at which the electromagnetic wave reception intensity S stored in the memory 7 or the like is maximized from the current position P1 in FIG.

At this time, the control unit 10 calculates the distance between the position Q at which the electromagnetic wave reception intensity S is maximized and the current position P1, and for example, when the distance is longer than a predetermined distance, the position using the thick line arrow is used. The direction of Q is displayed on the sub-display 4b. When the calculated distance between the position Q and the position P1 is equal to or less than a predetermined distance, the direction of the position Q is displayed on the sub-display 4b using a thin arrow. In this way, the control unit 10 changes the display of the arrow (information indicating the direction) based on the distance between P → Q.
Similar processing is performed at the positions P2 to P3 illustrated in FIG.

  Thus, the control unit 10 obtains the distance from the current position P at each time point to the position Q where the electromagnetic wave reception intensity S is maximized, and the obtained distance between P → Q is, for example, 3 [ mm] or less (step ST204). When the distance between P → Q is sufficiently small, it can be considered that the mobile terminal device 1 exists at the position Q. Therefore, when the control unit 10 determines that the distance between P → Q is 3 [mm] or less (step ST204 “Yes”), the control unit 10 controls the sub display 4b to end the above-described arrow display, for example, The message “Still on the opposite device” is displayed (step ST205).

  In the position P4 illustrated in FIG. 6, the control unit 10 determines that the mobile terminal device 1 is approaching the position Q where the electromagnetic wave reception intensity is the highest or exists at the position Q. Then, the control unit 10 causes the sub-display 4b to display the above-mentioned indication “still on the opposite device”.

  After the process of step ST205 is processed, the process returns to the above-described step ST204, and the subsequent processes are similarly performed. That is, the control unit 10 continues the display of “still on the opposite device” as long as the mobile terminal device 1 does not deviate from the position Q or the vicinity of the position Q.

  In the process of step ST204 described above, when the control unit 10 determines that the distance between P and Q is 3 [mm] or more, the process returns to step ST203. The control unit 10 that has returned to the process of step ST203 controls the sub display 4b to display the arrow indicating the direction from the current position P to the position Q as described above. Moreover, each process after step ST204 is repeated similarly. In other words, while the control unit 10 performs the process of obtaining the electromagnetic wave reception intensity S and the current position P for each time interval ΔT, the arrow indicating the direction from the position P at each time point to the position Q is displayed on the sub display 4b. The sub-display 4b is controlled so as to continue displaying.

  In step ST202 described above, when it is determined that the flag is not set (step ST202 “No”), the control unit 10 performs a timeout process (step ST206). Specifically, the display unit 4 is controlled to display the message displayed in the step ST201. In this way, the user is prompted to move the portable terminal device 1, and the operation of moving the portable terminal measure 1 in a circle above the opposite device 20 is performed again.

The mobile terminal device 1 described so far displays an arrow indicating the direction of the position Q where the electromagnetic reception intensity S with respect to the current position P is maximized, and guides the user to move the mobile terminal device 1 in the direction. Yes.
When the direction in which the mobile terminal device 1 is moved is guided to the user, the user may be notified of the moving direction according to the vibration generated by operating the vibration notification unit 15.

Specifically, the control unit 10 obtains the current position P and the electromagnetic wave reception intensity S every time the time interval ΔT elapses as described above. Similarly to the above, the maximum value Smax of the electromagnetic wave reception intensity stored in the memory 7 and the position Q at which the electromagnetic wave reception intensity is maximum are stored and updated.
Moreover, the control part 10 calculates | requires the direction of the position Q where the electromagnetic wave reception intensity | strength with respect to the present position P became the maximum as mentioned above.

Moreover, the control part 10 detects the moving direction of the portable terminal device 1 from the change of each position P calculated | required for every time interval (DELTA) T, and the said portable terminal device 1 is moving to the direction of the above-mentioned position Q. Judge whether or not.
When it is determined that the user is moving in the direction of the position Q, for example, the vibration notification unit 15 is operated to transmit vibration to the user who owns the mobile terminal device 1. Further, when it is determined that it is not moving in the direction of the position Q, the vibration of the vibration notification unit 15 is stopped, and the user is informed that the moving direction is inappropriate.

  Or the control part 20 operates the vibration alerting | reporting part 15, when it judges that it has not moved to the direction of the position Q, and tells a user that a moving direction is inappropriate by a vibration. Further, when it is determined that the movement is in the direction of the position Q, the vibration of the vibration notification unit 15 is stopped and the user is informed that the movement direction is appropriate.

The mobile terminal device 1 according to the first embodiment may be guided to the position Q using the arrow display and the vibration of the vibration notification unit 15 described above, and only displays information indicating the direction such as an arrow. Alternatively, guidance may be performed by performing only notification by vibration of the vibration notification unit 15.
In addition, you may make it alert | report the direction of the position Q using alerting | reporting means other than the alerting | reporting by the arrow display to the display part 4, and the vibration alerting | reporting in the vibration alerting | reporting part 15. FIG.

As described above, according to the first embodiment, the control unit 10 obtains the current position P of the mobile terminal device 1 using the detection value of the triaxial acceleration sensor 40 at a period of ΔT.
Further, the control unit 10 stores the intensity of the electromagnetic wave received by the electromagnetic wave receiving unit 8 in association with the position P described above, obtains the position Q where the electromagnetic wave receiving intensity is maximized, and controls the display unit 4 to control the position. An arrow for guiding to Q is displayed.

By doing in this way, the portable terminal device which a user possesses can be guide | induced to electromagnetic wave reception area | regions, such as near field communication, and the effort which a user searches for a reception area | region can be saved.
In addition, it is possible to reduce the man-hours for designing an antenna for receiving electromagnetic waves, the processing of a magnetic sheet for adjusting a non-communication area, and the man-hours for adjusting the frequency characteristics of the antenna for receiving electromagnetic waves.
Moreover, the design / manufacturing cost of the portable terminal device 1 can be suppressed by suppressing the above-described man-hours and the like.

In the above-described embodiment, the mobile terminal device 1 that performs short-range wireless communication using electromagnetic wave communication using the loop antenna 11 has been described. However, the present invention can also be applied to a mobile terminal device that performs processing other than short-range wireless communication. It is.
For example, the present invention can be applied to a non-contact charging structure of a mobile phone that is an example of a mobile terminal device. In this case, the mobile phone housing in which the loop coil (loop antenna) is arranged is placed on the placement portion of the non-contact charger that is the counterpart device, and transmitted from the non-contact charger. When an electromagnetic wave is received by the loop coil of the mobile phone, an electromotive force is generated by electromagnetic induction in the loop coil, and the generated electromotive force is arranged inside the housing to supply power to each electronic component of the mobile phone. The secondary battery is charged by being supplied to the battery.

  Even in this configuration, when the mobile phone is placed on the non-contact charger of the mobile phone, the position of the mobile phone is periodically detected based on the output of the triaxial acceleration sensor, and at the same cycle (timing) The reception intensity of the electromagnetic wave emitted from the charger is detected, the position Q where the electromagnetic wave reception intensity S is maximum is calculated, and the direction of the position Q with respect to the current position (mounting position) P is displayed on the display unit 4 It is only necessary to allow the user of the mobile phone to recognize a suitable placement position by vibration notification by the vibration notification unit 15 or the like. In this case, by placing the mobile phone casing at the position Q where the electromagnetic wave reception intensity S is maximized, electromagnetic waves emitted from the non-contact charger can be efficiently received, and electromagnetic induction in the loop coil can be performed. The voltage of the generated electromotive force may be detected, and the electromagnetic wave reception intensity may be obtained based on this voltage.

It is a block diagram which shows the structure of the portable terminal device by the 1st Embodiment of this invention. It is explanatory drawing which shows the structure of the portable terminal device shown in FIG. It is explanatory drawing which shows operation | movement of the portable terminal device shown in FIG. It is explanatory drawing which shows operation | movement of the portable terminal device shown in FIG. It is a flowchart which shows operation | movement of the portable terminal device shown in FIG. It is explanatory drawing which shows operation | movement of the portable terminal device shown in FIG. It is a flowchart which shows operation | movement of the portable terminal device shown in FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Portable terminal device, 2 ... Antenna, 3 ... Communication part, 4 ... Display part, 4a ... Main display, 4b ... Sub display, 5 ... Voice input / output part, 6 ... Key operation part, 7 ... Memory, 8 ... Electromagnetic wave Receiving unit, 8a Electromagnetic wave processing unit, 9 ... Power supply unit, 10 ... Control unit, 11 ... Loop antenna, 12 ... Control IC chip, 13 ... Memory, 15 ... Vibration notification unit, 20 ... Opposite machine, 40 ... Triaxial acceleration Sensor.

Claims (5)

A notification unit;
An electromagnetic wave receiving unit for receiving electromagnetic waves from the counterpart device;
An acceleration sensor capable of detecting acceleration of at least two axes,
With measuring a reception intensity of the electromagnetic wave in front Symbol electromagnetic wave receiving unit includes a control unit that monitors the detection value before Symbol acceleration sensor, a,
The control unit, triggered by the terminal itself enters a region electromagnetic wave that can be received from the other party apparatus, the self based on the measurement history variations Do履 history and electromagnetic wave receiving intensity of the detected value of the acceleration sensor Identify the positional relationship between the current position of the terminal and the position where the electromagnetic wave reception intensity is good, and notify the information indicating the positional relationship by the notification unit,
Mobile terminal device. The electromagnetic wave receiving unit includes a loop antenna for electromagnetic wave communication, and an electromagnetic wave processing unit that extracts a communication signal from the electromagnetic wave received by the loop antenna and performs a predetermined process.
The mobile terminal device according to claim 1. The electromagnetic wave receiving unit receives an electromagnetic wave related to short-range wireless communication by the loop antenna.
The mobile terminal device according to claim 2. The electromagnetic wave receiving unit receives an electromagnetic wave related to contactless charging by the loop antenna.
The mobile terminal device according to claim 2. The control unit updates the position where the reception strength of the electromagnetic wave is good based on the reception strength of the electromagnetic wave as needed even after the start of the notification.
The portable terminal device as described in any one of Claim 1 to 4.

Images