JP2009284525A - Method of controlling antenna of mobile terminal equipment, and the mobile terminal equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of controlling an antenna, without impairing the communication speed or the quality of mobile terminal equipment, such as a laptop PC or hand-held PC, and to provide mobile terminal equipment which is equipped with such a control method. <P>SOLUTION: A control method includes a utilization situation deciding step of deciding a situation where mobile terminal equipment 1 is being utilized; a utilization stop determining step of determining an antenna to be stopped being utilized from among a plurality of antennas, according to the utilization situation decided as being the utilization situation deciding step; and a utilization stopping step of stopping, by using the antenna determined to be stopped being utilized in the utilization stop deciding step. In the utilization situation deciding, the situation of utilization is decided, on the basis of a display direction of a display part 11 that the mobile terminal equipment 1 is equipped with. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a method for controlling the antenna of a mobile terminal device including a plurality of antennas, for example. More specifically, the present invention relates to a method for controlling an antenna in accordance with the usage status of the mobile terminal device and the mobile terminal device.

  In recent years, there has been an increasing interest in the effects of electromagnetic waves emitted from mobile terminal devices on the human body, and techniques for suppressing the absorption of such electromagnetic waves into the human body have become issues in the design of these mobile terminal devices. . For example, in the United States, a standard has been established in which the allowable amount of SAR (Specific Absorption Rate), which is an index of the amount of electromagnetic waves absorbed by the human body, is 1.6 W / kg or less.

  In such a situation, conventionally, in a mobile terminal device having a plurality of antennas for wireless communication, there is a method for always selecting and using one having a good SAR characteristic among the plurality of antennas. Proposed. For example, in Patent Document 1, in order to reduce SAR related to a mobile terminal device (for example, a mobile phone terminal), “a first antenna that has been subjected to treatment for obtaining good SAR characteristics in all usage modes” A method is disclosed in which the “second antenna not subjected to such a treatment” is used by switching according to the usage status of the mobile terminal device.

  Specifically, this method determines whether the external data terminal is in use, whether the communication mode is hands-free communication, whether the external audio communication terminal is in use, or whether the camera unit is in use. The first antenna and the second antenna are switched depending on the usage status of the mobile terminal device, such as whether or not there is an image communication state or packet communication state. Further, a method based on a method for determining the distance of the mobile terminal device from the human body and a method for detecting opening / closing of the housing of the mobile terminal device are also disclosed. Thus, the method disclosed in Patent Document 1 improves the SAR characteristics while avoiding as much as possible the reduction in the communication speed and quality of the mobile phone terminal.

JP 2003-283393 A

  However, when such a method is applied to, for example, a laptop PC or a handheld PC, a new problem arises.

  More specifically, as described above, the mobile phone terminal is assumed to have various usage conditions such as a data communication terminal, a voice communication terminal, a camera, an image communication terminal, or a packet communication terminal. Therefore, in order to select an antenna according to each use situation, it is necessary to use the complicated control method as described above. Furthermore, there is a restriction that the size of the terminal device must be reduced as a mobile phone terminal. For this reason, even if a plurality of antennas are provided, it is difficult to keep the SAR low unless the transmission output itself is reduced, regardless of the position of the antenna, when the antenna is used in close contact with a human body for voice calls or the like. It is assumed that Therefore, in such a case, in the method disclosed in Patent Document 1, it is necessary to select an antenna that has been subjected to a treatment for limiting the transmission output in order to maintain good SAR characteristics. In this case, a reduction in communication speed and quality of the mobile phone terminal must be allowed.

  On the other hand, in the case of a laptop PC or a handheld PC, the usage pattern is limited to some extent as compared with the above-described mobile phone terminal. Furthermore, these portable terminal devices are relatively loose in terms of size as a terminal device. In such a situation, if the antenna control method in the mobile phone terminal as described above is applied to a laptop PC or a handheld PC as it is, the control may become too complicated. In order to realize such complicated control, a lot of devices such as sensors for detecting the usage state are required. Therefore, the mechanism of the mobile terminal device itself becomes complicated, and the cause of failure increases accordingly. Further, when an antenna with a low output as described above is selected, there arises a problem that the communication speed and quality of the mobile terminal device are lowered.

  Under the circumstances as described above, it is desired to provide a method for controlling an antenna and a portable terminal device equipped with such a control means without impairing the communication speed and quality of portable terminal devices such as laptop PCs and handheld PCs. It is rare.

  The present invention includes a portable terminal device that can be used as a laptop PC or a handheld PC that includes a touch panel input unit in which a casing including a display unit and a casing including an input unit are connected so as to be opened and closed and rotated. A method of controlling a plurality of antennas, wherein a usage status determining step of determining a usage status of the mobile terminal device based on a display direction of the display unit, and according to the usage status determined in the usage status determination step, The method includes a use stop determination step for determining an antenna to be used out of the plurality of antennas, and a use stop step for canceling the use of the antenna that is determined to stop use in the use stop determination step.

  Alternatively, the usage status determining step is a method of determining the usage status based on a holding direction sensed by an acceleration sensor included in the mobile terminal device.

  In another aspect, the mobile terminal device can be connected to the docking station or includes a display direction rotation button for switching the display direction of the display unit.

  According to this invention, the antenna which stops using is appropriately determined among a plurality of installed antennas according to the usage status of the mobile terminal device. And the use condition of the said portable terminal device is judged based on the display direction of a display part, and the holding | maintenance direction by an acceleration sensor. In addition, it is not always necessary to use a plurality of antennas with a limited output. In particular, the methods according to these inventions suitably control an antenna in, for example, a laptop PC or a handheld PC.

  According to the method of the present invention, the SAR to the human body can be suppressed low by controlling the antenna of the mobile terminal device without impairing the communication speed and quality. In particular, for example, in a laptop PC or a handheld PC, the SAR can be accurately controlled.

It is a figure which shows the outline | summary of the physical structure of the portable terminal device 1 which concerns on an example of suitable embodiment of this invention. It is a figure which shows the motion of the housing | casing of the portable terminal device 1 which concerns on an example of suitable embodiment of this invention. It is a figure which shows the motion of the housing | casing of the portable terminal device 1 which concerns on an example of suitable embodiment of this invention. It is a figure which shows the motion of the housing | casing of the portable terminal device 1 which concerns on an example of suitable embodiment of this invention. It is a figure explaining the relationship between the display direction of the display part of the portable terminal device which concerns on an example of suitable embodiment of this invention, and control of an antenna. It is a figure explaining the relationship between the display direction of the display part of the portable terminal device which concerns on an example of suitable embodiment of this invention, and control of an antenna. It is a figure explaining the relationship between the display direction of the display part of the portable terminal device which concerns on an example of suitable embodiment of this invention, and control of an antenna. It is a figure explaining the relationship between the display direction of the display part of the portable terminal device which concerns on an example of suitable embodiment of this invention, and control of an antenna. It is a hardware block diagram of the portable terminal device 1 of the portable terminal device 1 which concerns on an example of suitable embodiment of this invention. It is a functional block diagram of the portable terminal device 1 which concerns on an example of suitable embodiment of this invention. It is a functional block diagram of the portable terminal device 1 which concerns on another example of suitable embodiment of this invention. It is a flowchart which shows the control flow of the antenna which concerns on an example of suitable embodiment of this invention. It is a flowchart which shows the control flow of the antenna which concerns on an example of suitable embodiment of this invention. It is a flowchart which shows the control flow of the antenna which concerns on an example of suitable embodiment of this invention.

  Preferred embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 shows an outline of a configuration of a mobile terminal device 1 according to an example of a preferred embodiment of the present invention. The mobile terminal device 1 includes two casings 14 and 15 that are substantially rectangular parallelepiped. Further, the housing 14 includes the input unit 10, and the housing 15 includes the display unit 11. Furthermore, the housing | casing 14 and the housing | casing 15 are connected by the connection part 13 at one point of the center of each edge part, and can rotate in the direction which opens and closes these housings mutually. Further, the casing 15 can be turned at least 180 degrees with the casing 15 standing on the casing 14. In this way, the mobile terminal device 1 can be used as a normal laptop PC as shown in FIG. 1, or the connecting portion 13 is rotated as shown in FIG. As shown in FIG. 4, it can be used as a handheld PC including the touch panel input unit 16 and the like by folding the casing 15 including the display unit on the casing 14 including the input unit 10 so as to overlap.

  Here, the laptop PC is not limited to the one shown in FIG. 1, and may be a so-called portable personal computer including parts such as a CPU, a memory, a hard disk device, a keyboard, and a display panel. . Further, the handheld PC is not limited to the one shown in FIG. 4, and is a so-called portable device including a CPU, a memory, a hard disk device, a touch panel, a pen input panel, a display panel, etc. as input means as described above. A simple computer or an information processing terminal. Furthermore, a device of a category called an electronic notebook or PDA may be included. Moreover, a keyboard may be included as input means.

  As illustrated in FIG. 5, the mobile terminal device 1 includes the first antenna 100 and the second antenna 110 on two sides of the casing 15 that supports the display unit 11. These antennas are connected to the wireless LAN card 120, and these cooperate to realize the communication means of the mobile terminal device 1. In addition, the mobile terminal device 1 includes a display direction rotation button 17 on the same surface as the display unit 11 of the housing 15 that supports the display unit 11. By pressing this button, the user can switch the display direction of the display unit 11 by a preset angle such as 90 degrees or 180 degrees. In addition, if this display direction rotation button 17 is a place which can be operated in both the state used as a laptop PC (for example, FIG. 1) and the state used as a handheld PC (for example, FIG. 4), You may install in any position of the housing | casing of the portable terminal device 1. FIG.

  Further, the display direction of the display unit 11 is automatically changed depending on the positional relationship between the cases of using as a laptop PC as shown in FIG. 2 and using as a handheld PC as shown in FIG. You may make it switch to.

  FIG. 5 illustrates a state in which the display direction of the mobile terminal device 1 is set to the first vertical display mode. In an example of a preferred embodiment according to the present invention, in the display mode, the second antenna 110 positioned on the lower side of the display direction is the most on the user's human body in consideration of how the user holds. It is determined that the second antenna 110 is near and the use of the second antenna 110 is stopped.

  FIG. 6 illustrates a state in which the display direction of the mobile terminal device 1 is set to the second vertical display mode. The direction of 180 degree display is different from the first vertical display mode shown in FIG. The user of the mobile terminal device 1 can switch between these display modes by pressing the display direction rotation button 17. In an example of a preferred embodiment according to the present invention, in the display mode, the first antenna 100 and the second antenna 110 are separated from the user's human body in consideration of how the user holds. Judgment and use of both antennas are possible. In this case, an antenna having a good use condition is selected and used by a known method that has been conventionally performed.

  Furthermore, as shown in FIG. 7, when the mobile terminal device 1 is in the first horizontal display mode, the first antenna 100 positioned on the lower side of the display direction is considered in consideration of how the user holds. It is determined that it is closest to the user's human body, and the use of the first antenna 100 is stopped. As shown in FIG. 8, when the display direction of the mobile terminal device 1 is set to the second horizontal display mode, the first antenna 100 and the second antenna 110 are both used by the user in consideration of how to hold the user. Therefore, both antennas can be used. In this case, an antenna having a good use condition is selected and used by a known method that has been conventionally performed.

  In this way, according to the present invention, in consideration of how the user is held, the antenna positioned below the display direction is determined to be close to the human body of the user, and the antenna is used. Can be canceled automatically. This makes it possible to always use radio by disabling the antenna near the hand or body of the user holding the mobile terminal device 1 and enabling only the antenna far from the hand or body. Nevertheless, the SAR to the human body can be reduced as much as possible.

  In addition, an acceleration sensor may be installed inside the housing of the mobile terminal device 1, and the four usage states shown in FIGS. 5 to 6 may be determined from the holding direction of the terminal sensed by the acceleration sensor. Specifically, when the antenna is present on the lower side of the four sides of the housing, the antenna is determined to be closest to the user's human body, and the antenna Discontinue use. In this case, the determination can be performed without using information on the display direction of the display unit 11.

  Furthermore, the display direction of the display unit may be automatically switched according to the result of the above-described determination of the vertical relationship of the casing. In this way, each time the user changes the way of holding the mobile terminal device 1, the display direction of the display unit 11 is changed without pressing the display direction rotation button 17, and at the same time, suitable for the display direction. The antenna can be switched.

  When the portable terminal device 1 is docked in the docking station (when used as a laptop PC), the docking is detected by a sensor or the like, and the direction of the instruction of the terminal sensed by the acceleration sensor is affected. Alternatively, both the first antenna 100 and the second antenna 110 can be used. In this case, an antenna having a good use condition is selected and used by a known method that has been conventionally performed.

  FIG. 9 is a hardware configuration diagram of the mobile terminal device 1 according to the present invention. The control unit 140 controls the mobile terminal device 1 as a whole. In addition, the mobile terminal device 1 includes a communication control unit 130 including an antenna control unit 131 that controls the first antenna 100 and the second antenna 110. The antenna control unit 131 determines the antenna to be stopped as described above, and stops using the antenna according to the determination.

  Furthermore, the mobile terminal device 1 may include an acceleration sensor 150. Moreover, you may provide the docking sensor 160 which detects whether it is connected to the docking station. Using the detection results of these sensors, the antenna control unit 131 controls the antenna in cooperation with the control unit 140 as described above. These various types of hardware are connected via a bus 180. As the control unit 140 reads and executes the program stored in the storage unit 170 as needed, the above-described hardware cooperates to realize various means according to the present invention.

  As those skilled in the art readily understand, acceleration sensors 150 have been proposed in various specifications, for example, a combination of piezoelectric ceramic elements and electrodes. When acceleration (for example, gravitational acceleration in a stationary state) is applied to the piezoelectric ceramic element from the outside, the piezoelectric ceramic element is distorted and stress is generated inside. This stress is converted into an electric signal (charge) by the piezoelectric effect, and the direction and magnitude of acceleration can be detected from the electric signal. As a result, in the stationary state, the direction of gravitational acceleration can be detected, and the holding direction of the mobile terminal device 1 can be calculated from this direction.

  FIG. 10 is a functional configuration diagram of the mobile terminal device 1 according to an example of the preferred embodiment of the present invention. The control unit 140 controls the mobile terminal device 1 as a whole. The control unit 140 also controls the antenna control unit 131 that controls the first antenna 100 and the second antenna 110, the built-in button controller 240 that controls built-in buttons such as the display direction rotation button 17, and the display unit 11. In cooperation with the graphic controller 250 and the like, the mobile terminal device 1 provides various functions. Various user applications such as a word processor can run on the OS (operating system) 200. The OS 200 drives various hardware through the control unit 140, the antenna control unit 131, the built-in button controller 240, the graphic controller 250, and the like through a kernel level process group including the built-in button driver 220 and the graphic driver 230 described above. To do.

  In an example of a preferred embodiment according to the present invention, when the user presses the display direction rotation button 17 of the mobile terminal device 1, the built-in button controller 240 senses the pressing. Then, the built-in button controller 240 notifies the OS 200 that the button has been pressed through the built-in button driver 220. The OS 200 transmits a screen rotation command having a preset rotation angle (for example, 90 degrees) to the graphic controller 250 through the graphic driver 230. The graphic controller 250 receives the command and rotates the display direction of the display unit 11 (for example, 90 degrees) according to the command. Furthermore, when the control unit 140 senses that the display direction rotation button has been pressed through the OS 200 or the like, the control unit 140 confirms the display direction of the display unit 11 with respect to the OS 200. The OS 200 acquires information regarding the display direction from the graphic controller 250 through the graphic driver 230. The control unit 140 acquires information related to the display direction from the OS 200, determines whether to stop / use the first antenna and the second antenna based on the information related to the display direction, and executes the determination through the antenna control unit 131. To do.

  FIG. 11 is a functional configuration diagram of the mobile terminal device 1 according to another example of the preferred embodiment of the present invention. Similar to FIG. 10, the control unit 140 controls the entire mobile terminal device 1. The control unit 140 includes an antenna control unit 131 that controls the first antenna 100 and the second antenna 110, a device controller 270 that controls the acceleration sensor 150, the docking sensor 160, and the like, and a graphic controller that controls the display unit 11. In cooperation with 250 and the like, the mobile terminal device 1 provides various functions. Various user applications such as a word processor can run on the OS (operating system) 200. The OS 200 drives various hardware through the above-described control unit 140, antenna control unit 131, device controller 270, graphic controller 250, and the like through a kernel level process group including a device driver 260 and a graphic driver 230.

  In another example of a preferred embodiment according to the present invention, when the user changes the holding direction, the acceleration sensor 150 detects the change. When the change in the holding direction is detected, the change is notified to the OS 200 through the device driver 260. The control unit 140 acquires the change from the OS 200, determines whether to suspend / use the first antenna and the second antenna based on the change information, and executes the determination through the antenna control unit 131.

  Furthermore, in still another example of a preferred embodiment according to the present invention, the docking sensor 160 detects that the mobile terminal device 1 is docked in a docking station (not shown). In this case, similarly to the case of the acceleration sensor 150 described above, the control unit 140 recognizes that the docking is performed, and changes the display direction of the display unit 11 through the graphic controller 250 in the second horizontal display mode of FIG. Switch to. Furthermore, both the first antenna and the second antenna can be used through the antenna control unit 131. In this case, an antenna having a good use condition is selected and used by a known method that has been conventionally performed.

  FIG. 12 is a flowchart showing an antenna control flow according to an example of the preferred embodiment of the present invention. First, the control unit 140 determines whether or not the display direction rotation button 17 has been pressed (step S01). When determining that the button has been pressed, the control unit 140 inquires the OS (operating system) running on the mobile terminal device 1 about the display direction of the display unit 11 (step S02).

  Next, when the result of the inquiry is the first vertical display mode shown in FIG. 5 (step S03), the antenna control unit 131 stops using the second antenna 110 (step S04). If the result of the inquiry is the second vertical display mode shown in FIG. 6 (step S05), the antenna control unit 131 can use both the first antenna 100 and the second antenna 110 ( Step S06). In this case, an antenna having a good use condition is selected and used by a known method that has been conventionally performed.

  If the result of the inquiry is the first horizontal display mode shown in FIG. 7 (step S07), the antenna control unit 131 stops using the first antenna 100 (step S08). If the result of the inquiry is the second horizontal display mode shown in FIG. 8 (step S09), the antenna control unit 131 can use both the first antenna 100 and the second antenna 110 ( Step S10). In this case, an antenna having a good use condition is selected and used by a known method that has been conventionally performed.

  Thus, the control after step S01 is repeated until the use of the portable terminal device is terminated (step S11).

  FIG. 13 is a flowchart showing an antenna control flow according to another example of the preferred embodiment of the present invention. First, the control unit 140 determines whether or not the holding direction of the mobile terminal device 1 has changed (step S101). Next, when the control unit 140 determines that the holding direction has changed, and when it is determined that the second side surface illustrated in FIG. 5 is below (step S103), the antenna control unit 131 sets the second side. Use of the antenna 110 is stopped (step S104). In addition, when the control unit 140 determines that the holding direction has changed and determines that the fourth side surface illustrated in FIG. 5 is located below (step S105), the antenna control unit 131 sets the first antenna. Both 100 and the second antenna 110 can be used (step S106). In this case, an antenna having a good use condition is selected and used by a known method that has been conventionally performed.

  In addition, when the control unit 140 determines that the holding direction has changed and determines that the first side surface illustrated in FIG. 5 is located downward (step S107), the antenna control unit 131 sets the first antenna. The use of 100 is stopped (step S108). In addition, when the control unit 140 determines that the holding direction has changed and determines that the third side surface illustrated in FIG. 5 is located below (step S109), the antenna control unit 131 sets the first antenna. Both 100 and the second antenna 110 can be used (step S110). In this case, an antenna having a good use condition is selected and used by a known method that has been conventionally performed.

  Thus, the control after step S101 described above is repeated until the use of the portable terminal device is terminated (step S111).

  FIG. 14 is a flowchart showing an antenna control flow according to still another example of the preferred embodiment of the present invention. First, the control unit 140 determines whether or not the mobile terminal device 1 is docked at the docking station (step S121). Next, when the control unit 140 determines that docking has been performed, the display direction of the display unit 11 is switched to the second horizontal display mode in FIG. 8 (step S122), and the antenna control unit 131 includes the first antenna 100 and the first antenna 100. Both antennas 110 can be used (step S123). In this case, an antenna having a good use condition is selected and used by a known method that has been conventionally performed.

  Thus, the control after step S121 described above is repeated until the use of the portable terminal device is terminated (step S124).

  In the above-described embodiment, the case where the mobile terminal device 1 has two antennas has been described. However, when the mobile terminal device 1 has three or more antennas, the display direction of the display unit is reduced in the same manner as described above. The use of the antenna located on the side can be stopped. Further, in the same manner, the use of the antenna that is determined to be positioned at the lowest side by the acceleration sensor can be stopped.

  In the preferred embodiment according to the present invention, the use of an antenna with a reduced transmission output is not necessarily required, but the present invention does not deny the use of such an antenna. For example, it is possible to provide an antenna that includes more antennas, of which a part of transmission output is suppressed.

  As mentioned above, although embodiment of this invention was described, it only showed the specific example and does not specifically limit this invention. Further, the effects described in the embodiments of the present invention only list the most preferable effects resulting from the present invention, and the effects of the present invention are not limited to the effects described in the embodiments of the present invention.

  The present invention is applicable to antenna control in a portable terminal device that may be used near a human body.

DESCRIPTION OF SYMBOLS 1 Portable terminal device 10 Input part 11 Display part 13 Connection part 14 Case 15 Case 16 Touch panel input part 17 Display direction rotation button 50 User level process group 60 Kernel level process group 100 1st antenna 110 2nd antenna 120 Wireless LAN card 130 Communication Control Unit 131 Antenna Control Unit 140 Control Unit 150 Acceleration Sensor 160 Docking Sensor 170 Storage Unit 180 Bus 200 OS (Operating System)
210 User application 220 Built-in button driver 230 Graphic driver 240 Built-in button controller 250 Graphic controller 260 Device driver 270 Device controller

Claims (17)

A plurality of antennas included in a portable terminal device that can be used as a laptop PC or a handheld PC including a touch panel input unit in which a casing including a display unit and a casing including an input unit are coupled so as to be opened and closed and rotated. A method controlled by the mobile terminal device,
A usage status determining step of determining a usage status of the mobile terminal device based on a display direction of the display unit;
In accordance with the usage status determined in the usage status determination step, a usage cancellation determination step of determining an antenna to be used out of the plurality of antennas;
A use stopping step of stopping the use of the antenna that has been determined to stop use in the use stop determining step.   The method according to claim 1, wherein the use state determination step includes a step in which an acceleration sensor included in the mobile terminal device senses a holding direction. A case having a display unit and a case having an input unit are connected so that they can be opened and closed and rotated, and can be used as a laptop PC or a handheld PC having a touch panel input unit. A method in which the mobile terminal device controls a plurality of antennas attached to a casing of a terminal device,
A usage status determining step of determining a usage status of the mobile terminal device based on a display direction of the display unit;
Use stop determination step of determining an antenna attached to a side of the housing located below the display direction in the use state determination step as an antenna to stop use;
A use stopping step of stopping the use of the antenna that has been determined to stop use in the use stop determining step. A case having a display unit and a case having an input unit are connected so that they can be opened and closed and rotated, and can be used as a laptop PC or a handheld PC having a touch panel input unit. A method in which the mobile terminal device controls an antenna attached to a casing of a terminal device,
A usage status determining step of determining a usage status of the mobile terminal device based on a display direction of the display unit;
And a use stopping step of stopping the use of the antenna when the use state judging step judges that the antenna is positioned below the display direction. A method in which the mobile terminal device controls a plurality of antennas provided in a mobile terminal device connectable to a docking station,
A usage status determination step of determining a usage status of the mobile terminal device based on a display direction of a display unit included in the mobile terminal device;
In accordance with the usage status determined in the usage status determination step, a usage cancellation determination step of determining an antenna to be used out of the plurality of antennas;
A use stopping step of stopping the use of the antenna that has been determined to stop use in the use stop determining step. A portable terminal device including a display unit, a display direction rotation button for switching a display direction of the display unit and a plurality of antennas, controls the antenna,
A usage status determining step of determining a usage status of the mobile terminal device based on a display direction of the display unit;
In accordance with the usage status determined in the usage status determination step, a usage cancellation determination step of determining an antenna to be used out of the plurality of antennas;
A use stopping step of stopping the use of the antenna that has been determined to stop use in the use stop determining step. A portable terminal device including a plurality of antennas, a casing having a display unit, and a casing having an input unit coupled so as to be capable of opening and closing and rotating, and usable as a laptop PC or a handheld PC having a touch panel input unit Because
Usage status determination means for determining the usage status of the mobile terminal device based on the display direction of the display unit;
In accordance with the usage status determined by the usage status determination means, use cancellation determination means for determining an antenna to be used out of the plurality of antennas;
A portable terminal device comprising: a use canceling unit that cancels use of the antenna for which the use stop determining unit has determined to stop using;   The portable terminal device according to claim 7, wherein the usage status determination unit includes an acceleration sensor. A casing having a display unit and a casing having an input unit are connected so as to be openable and closable and rotatable, and can be used as a laptop PC or a handheld PC having a touch panel input unit. A mobile terminal device comprising a plurality of antennas attached to the body,
Usage status determination means for determining the usage status of the mobile terminal device based on the display direction of the display unit;
Use stop determining means for determining the antenna attached to the side of the casing located below the display direction by the use state determining means as an antenna to stop using;
A portable terminal device comprising: a use canceling unit that cancels use of the antenna for which the use stop determining unit has determined to stop using; A casing having a display unit and a casing having an input unit are connected so as to be openable and closable and rotatable, and can be used as a laptop PC or a handheld PC having a touch panel input unit. A mobile terminal device comprising an antenna attached to the body,
Usage status determination means for determining the usage status of the mobile terminal device based on the display direction of the display unit;
A portable terminal device comprising: a use stopping unit that stops use of the antenna when the use state judging unit judges that the antenna is positioned below the display direction. A portable terminal device having a plurality of antennas and capable of being connected to a docking station,
Usage status determining means for determining a usage status of the mobile terminal device based on a display direction of a display unit included in the mobile terminal device;
In accordance with the usage status determined by the usage status determination means, use cancellation determination means for determining an antenna to be used out of the plurality of antennas;
A portable terminal device comprising: a use canceling unit that cancels use of the antenna for which the use stop determining unit has determined to stop using; A portable terminal device including a display unit, a display direction rotation button for switching a display direction of the display unit, and a plurality of antennas,
Usage status determination means for determining the usage status of the mobile terminal device based on the display direction of the display unit;
In accordance with the usage status determined by the usage status determination means, use cancellation determination means for determining an antenna to be used out of the plurality of antennas;
A portable terminal device comprising: a use canceling unit that cancels use of the antenna for which the use stop determining unit has determined to stop using; A portable terminal device including a plurality of antennas, a casing having a display unit, and a casing having an input unit coupled so as to be capable of opening and closing and rotating, and usable as a laptop PC or a handheld PC having a touch panel input unit In addition,
A usage status determination function for determining the usage status of the mobile terminal device based on the display direction of the display unit;
In accordance with the usage status determined by the usage status determination function, a use cancellation determination function for determining an antenna to be used out of the plurality of antennas, and
A computer program for realizing a use stop function for stopping use of an antenna for which use stop determination function has been determined to stop use. A casing having a display unit and a casing having an input unit are connected so as to be openable and closable and rotatable, and can be used as a laptop PC or a handheld PC having a touch panel input unit. To a mobile terminal device having a plurality of antennas attached to the body,
A usage status determination function for determining the usage status of the mobile terminal device based on the display direction of the display unit;
A use stop determination function for determining the antenna attached to the side of the housing located on the lower side of the display direction as the use state determination function as an antenna for canceling use;
A computer program for realizing a use stop function for stopping use of an antenna for which use stop determination function has been determined to stop use. A casing having a display unit and a casing having an input unit are connected so as to be openable and closable and rotatable, and can be used as a laptop PC or a handheld PC having a touch panel input unit. To a mobile terminal device equipped with an antenna attached to the body,
A usage status determination function for determining the usage status of the mobile terminal device based on the display direction of the display unit;
A computer program for realizing a use stop function for stopping use of the antenna when the use state judging function judges that the antenna is located below the display direction. To a mobile terminal device that can be connected to a docking station and has multiple antennas,
A usage status determination function for determining a usage status of the mobile terminal device based on a display direction of a display unit included in the mobile terminal device;
In accordance with the usage status determined by the usage status determination function, a use cancellation determination function for determining an antenna to be used out of the plurality of antennas, and
A computer program for realizing a use stop function for stopping use of an antenna for which use stop determination function has been determined to stop use. To a mobile terminal device including a display unit, a display direction rotation button for switching the display direction of the display unit, and a plurality of antennas,
A usage status determination function for determining the usage status of the mobile terminal device based on the display direction of the display unit;
In accordance with the usage status determined by the usage status determination function, a use cancellation determination function for determining an antenna to be used out of the plurality of antennas, and
A computer program for realizing a use stop function for stopping use of an antenna for which use stop determination function has been determined to stop use.

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