JP2009100455A - Communication apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a communication apparatus which can ensure superior performance of a first antenna without complicating its structure. <P>SOLUTION: A main antenna 61 for transceiving radio waves of a first predetermined frequency(resonance frequency fc), a first frequency change unit 63 for changing the first predetermined frequency, a function operation unit 71 for operating a predetermined function, a control unit 70 for controlling the first frequency change unit 63 so that the first predetermined frequency is changed according to the operation state of the function by the function operation unit 71 are provided. As an example, the control unit 70 controls the first frequency change unit 63 so that the first predetermined frequency is changed to the high frequency side when the specific function is operated by the function operation unit 71. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a communication device having an antenna.

  2. Description of the Related Art In recent years, various applications such as a mail function, an Internet browsing function, a TV phone function, and the like have been installed in communication devices.

  Here, in the communication device, the usage state varies depending on the type of application to be activated. For example, when using the call function, the user uses the communication device by pressing it against the ear and mouth while supporting the communication device with hands. Further, when using the mail function or the Internet browsing function, the user manually operates the operation unit while supporting the communication device with his / her hand.

  However, when the user operates the operation unit in this way, the part in which the antenna is incorporated may be covered with a hand or the like.

  As described above, when the antenna placement site is covered with a hand, the resonance frequency of the antenna is lowered and the performance of the antenna may be deteriorated.

Various techniques have been proposed in order to avoid such deterioration of antenna performance due to use conditions (see, for example, Patent Document 1 or 2).
JP 2004-179995 A JP 2004-363863 A

  However, in Patent Document 1 and Patent Document 2, by providing a sensor that senses contact with a human body, a technique for selecting an antenna that can perform communication appropriately from a plurality of antennas is avoided, and the structure is avoided from becoming complicated. I can't.

  The present invention has been made in view of the above-described problems, and one of its purposes is to provide a communication device that can ensure good antenna performance without incurring a complicated structure. It is in.

  In order to solve the above problems, a communication device according to the present invention includes a first antenna that resonates at a first predetermined frequency, first frequency changing means that changes the first predetermined frequency, and a predetermined frequency. And a control means for controlling the first frequency changing means to change the first predetermined frequency in accordance with an operation state of the function by the function operating means. It is characterized by that.

  In the communication device, the control means may be configured to change the first frequency changing means to change the first predetermined frequency to a high frequency side when a specific function is operated by the function operating means. It is preferable to control.

  Further, the communication device includes a display unit, the function operation unit is configured to operate a function accompanied by a display by the display unit, and the control unit displays the display by the display unit by the function operation unit. It is preferable to control the first frequency changing means so as to change the first predetermined frequency to a higher frequency side when a function involving the operation is performed.

  Further, the communication device includes an operation unit, the functional operation unit is configured to operate a function accompanied by an operation by the operation unit, and the control unit is operated by the operation unit by the functional operation unit. It is preferable to control the first frequency changing means so as to change the first predetermined frequency to a higher frequency side when a function involving the operation is performed.

  Further, in the communication device, the second antenna that resonates at a second predetermined frequency and the function operation means operate so as to operate a short-range communication function using a radio wave transmitted and received by the second antenna. And the control means controls the first frequency changing means to change the first predetermined frequency to a higher frequency side when the short-range communication function is operated by the function operating means. It is preferable.

  Further, the communication device includes a voice notification unit, the function operation unit is configured to operate a function accompanied by a voice notification by the voice notification unit, and the control unit is configured to operate the voice by the function operation unit. It is preferable to control the first frequency changing unit so that the first predetermined frequency is changed to a higher frequency side when a function involving voice notification by the notification unit is operated.

  In addition, the communication device includes a display unit or an operation unit, and a voice notification unit, and the function operation unit includes a function involving display by the display unit or a function involving operation by the operation unit, and the sound. The control means is configured to operate a function involving voice notification by the notification means, and the control means operates a function accompanied by a display by the display means by the function operation means or a function accompanied by an operation by the operation means by the function operation means. When this is done, the first frequency changing means is controlled to change the first predetermined frequency to the high frequency side up to a third predetermined frequency, and the voice notification by the voice notification means is performed by the functional operation means. The first predetermined frequency is changed to a higher frequency side up to a fourth predetermined frequency higher than the third predetermined frequency. It is preferable to control the first frequency changing means.

  In the communication device, it is preferable that the function accompanied by the voice notification by the voice notification unit operated by the function operation unit is a call function using a radio wave transmitted and received by the first antenna.

  In the communication device, the function operating unit is configured to operate a function accompanied by voice notification by an external voice notification device, and the control unit is configured to perform the first predetermined change by the first frequency changing unit. When a function involving voice notification by the voice notification device is operated by the function operating means in a state where the frequency is changed to the high frequency side, the frequency changed to the high frequency side is changed to the low frequency side. Preferably, the first frequency changing means is controlled.

  Further, in the communication device, the control unit performs voice notification by the voice notification device by the functional operation unit in a state where the first predetermined frequency is changed to a high frequency side by the first frequency changing unit. When the accompanying function is operated, it is preferable to control the first frequency changing means so that the frequency changed to the high frequency side is changed to the first predetermined frequency.

  In the communication device, the control unit changes the first predetermined frequency to a high frequency side when a predetermined condition is satisfied when the short-range communication function is operated by the functional operation unit. When the predetermined condition is not satisfied, it is preferable to control the first frequency changing unit so as not to change the first predetermined frequency to the high frequency side.

  In the communication device, the short-range communication function includes a Bluetooth (trademark) function and another function different from the Bluetooth function, and the control unit is configured so that the other function is performed by the function operation unit. When the operation is performed, the first predetermined frequency is changed to a high frequency side assuming that the predetermined condition is satisfied, and the predetermined function is not satisfied when the Bluetooth function is operated by the function operation unit. For example, it is preferable to control the first frequency changing means so as not to change the first predetermined frequency to the high frequency side.

  The communication device further includes a second frequency changing unit that changes the second predetermined frequency, and the control unit operates when the short-range communication function is operated by the function operating unit. Preferably, the second frequency changing means is controlled so as to change the predetermined frequency of 2 to the high frequency side.

  In the communication device, the control unit changes the second predetermined frequency to a higher frequency side when a predetermined condition is satisfied when the short-range communication function is operated by the functional operation unit. When the predetermined condition is not satisfied, it is preferable to control the second frequency changing unit so as not to change the second predetermined frequency to the high frequency side.

  In the communication device, the short-range communication function includes a Bluetooth function and another function different from the Bluetooth function, and the control unit operates the other function by the function operation unit. When the second predetermined frequency is changed to the high frequency side assuming that the predetermined condition is satisfied, and the Bluetooth function is operated by the function operating means, the predetermined condition is not satisfied. It is preferable to control the second frequency changing means so as not to change the second predetermined frequency to the high frequency side.

  According to the present invention, since the resonance frequency of the antenna is changed according to the operation state of the function, it is possible to provide a communication device that can ensure good antenna performance without causing a complicated structure.

  Embodiments of the present invention will be described below.

FIG. 1 is an external perspective view of a mobile phone device 1 which is an example of a communication device according to the present invention. In the following, a mobile phone device will be described. However, the present invention is not limited to this, and any device having an imaging function and a communication function may be used. For example, PHS (Personal
It may be a handy phone system (PDA), a personal digital assistant (PDA), a portable navigation device, a notebook personal computer, or the like.

  The mobile phone device 1 includes an operation unit side body unit 2 and a display unit side body unit 3. The operation unit side body unit 2 includes an operation key group 11 and a microphone 12 into which a voice uttered by a user of the mobile phone device 1 is input on the surface unit 10. The operation key group 11 includes a function setting operation button 13 for operating various functions such as various settings, a telephone book function, and a mail function, and an input operation button 14 for inputting a telephone number and characters such as mail. And a determination operation button 15 for performing determination and scrolling in various operations.

  Further, the display unit side body unit 3 has a display 21 for displaying various information on the surface unit 20, an audio output unit 22 for outputting the voice of the other party on the call, and a CCD (Charge Coupled) for imaging the subject. (Device) An image pickup unit 23 constituted by a camera or the like and a speaker 24 for outputting music or the like to the outside are provided.

  In addition, since the image capturing unit 23 has an image capturing direction perpendicular to the display surface of the surface unit 20, the image capturing unit 23 captures an image when a person who holds and operates the mobile phone device 1 views the display 21 from the front. The direction is oriented in the direction in which the person's face is located. The imaging unit 23 may be provided on the surface portion 10 of the operation unit side body 2 instead of being provided on the display unit side body 3. In such a case, the imaging direction of the imaging unit 23 is also provided. The mobile phone device 1 may be held in the direction in which the face of the person who operates it is positioned.

  Further, the upper end of the operation unit side body 2 and the lower end of the display unit side body 3 are connected via a hinge mechanism 4. In addition, the cellular phone device 1 relatively rotates the operation unit side body unit 2 and the display unit side body unit 3 connected via the hinge mechanism 4, thereby The display unit side body 3 can be in a state of being open to each other (open state), or the operation unit side body 2 and the display unit side body 3 can be in a folded state (folded state).

  1 shows a form of a so-called foldable mobile phone device, but the form of the mobile phone device according to the present invention is not particularly limited to this, and the operation unit side body unit 2 and the display unit side body unit are not limited thereto. A slide type in which one housing is slid in one direction from a state in which the body portion 3 is overlaid, and an axis line along the overlapping direction of the operation portion side housing portion 2 and the display portion side housing portion 3 A rotary type (turn type) in which one casing is rotated around the center, and the operation section side casing section 2 and the display section side casing section 3 are arranged in one casing and have a connecting portion. There may be no type (straight type).

  FIG. 2 is a functional block diagram showing functions of the mobile phone device 1. As shown in FIG. 2, the mobile phone device 1 performs predetermined control with an operation key group 11 (operation means), a first communication unit 60 that communicates with an external terminal, a second communication unit 90, and the like. A control unit 70 (control unit) to perform, a function operation unit 71 (function operation unit) for operating a predetermined function, a display unit 72 (display unit), a voice notification unit 73 (voice notification unit), and a predetermined capacity The rechargeable battery 74 and the power supply that converts the power supply voltage supplied from the rechargeable battery 74 to a predetermined voltage, and supplies the converted voltage to the first communication unit 60, the second communication unit 90, the control unit 70, etc. Circuit portion 75.

  The first communication unit 60 includes a main antenna 61 that resonates at a resonance frequency fc (first predetermined frequency), a first communication processing unit 62 that performs signal processing such as modulation processing or demodulation processing, and the main antenna 61. And a first frequency changing unit 63 (first frequency changing means) for changing the resonance frequency fc of the first.

  For example, the main antenna 61 communicates with an external device (base station) in a frequency band near 800 MHz. Note that the main antenna 61 may have a configuration corresponding to a plurality of bands that can support other frequency bands (for example, 2 GHz).

  The first communication processing unit 62 demodulates the signal received by the main antenna 61, supplies the processed signal to the control unit 70, and modulates the signal supplied from the control unit 70, It transmits to an external apparatus (base station) via 61.

  The first frequency changing unit 63 changes the resonance frequency of the main antenna 61 to the high frequency side or the low frequency side according to the control of the control unit 70.

  The second communication unit 90 includes a short-range communication antenna 91 that resonates at a resonance frequency fd (second predetermined frequency), a second communication processing unit 92 that performs signal processing such as modulation processing or demodulation processing, A second frequency changing unit 93 (second frequency changing means) that changes the resonance frequency fd of the distance communication antenna 91.

  The near field communication antenna 91 performs near field communication with an external device (a device different from the base station) in a frequency band near 13.56 MHz, for example. The short-range communication antenna 91 also has a Bluetooth antenna, and is configured to be able to perform short-range communication with an external device in a frequency band near 2.45 GHz.

  The second communication processing unit 92 demodulates the signal received by the short-range communication antenna 91, supplies the processed signal to the control unit 70, while modulating the signal supplied from the control unit 70, The data is transmitted to the external device via the short-range communication antenna 91.

  The second frequency changing unit 93 changes the resonance frequency (resonance frequency fd) of the short-range communication antenna 91 to the high frequency side or the low frequency side according to the control of the control unit 70.

  The control unit 70 performs predetermined control on the function operation unit 71. Therefore, the control unit 70 can grasp what function is currently operated by the function operation unit 71.

  The function operation unit 71 operates a predetermined function under the control of the control unit 70. For example, when the user performs a predetermined operation on the operation key group 11 at the time of an incoming call, the function operation unit 71 performs a call function (a function using radio waves transmitted and received by the main antenna 61), short-range communication. A function (function using a radio wave transmitted / received by the short-range communication antenna 91) is operated, or a mail function or an Internet browsing function is operated in accordance with an operation of the operation key group 11.

  The display unit 72 displays predetermined information under the control of the control unit 70. For example, the display unit 72 displays a message notifying of an incoming call when an incoming call is received, or displays a mailer (an application for reading and writing mail) when the mail function is operated by the function operation unit 71.

  The voice notification unit 73 corresponds to the voice output unit 22 and the speaker 24 and notifies the outside of the voice according to the control of the control unit 70.

  The power supply circuit unit 75 transforms the power supply voltage supplied from the rechargeable battery 74 to a predetermined voltage value, and supplies the power supply voltage after the transformation to the first communication unit 60, the control unit 70, and the like.

  Here, the operation of the control unit 70 will be described with reference to the flowchart shown in FIG. In the following, a state in which the normal standby function by the function operation unit 71 is operated, that is, a state in which it is estimated that the user does not hold the mobile phone device 1 is referred to as “use state 1”. 71 is a state in which a function (one of specific functions) accompanied by voice notification by the voice notification unit 73 represented by a normal call function or the like by 71 is operated, that is, the user tries to hear the voice notification by the voice notification unit 73. A state in which it is estimated that the cellular phone device 1 is held against the hand is “usage state 2”, and a predetermined function (for example, a mail function, an Internet browsing function, a TV phone function, A function involving display by the display unit 72 such as a hands-free call function, a function involving operation by the operation key group 11, or a short-range communication function (all of which are specific functions) Is operated, that is, the user is holding the mobile phone device 1 in his / her hand and looking at the display unit 72, is operating the operation key group 11 but is not pressed against the face, etc. Is assumed to be in the near-field communication with the external device with the mobile phone device 1 in hand.

  The control unit 70 always keeps track of each usage state. At present, it is assumed that the mobile phone device 1 is in the usage state 1 and the resonance frequency fc of the main antenna 61 is a first predetermined frequency (for example, 800 MHz).

  In step S <b> 1, the control unit 70 determines whether or not a function excluding a call function has been used, for example, whether or not a Web function, a mail function, a near field communication function, or the like has been used. If it is determined that these functions are in use (usage state 3) (Yes), the process proceeds to step S8. If it is determined that these functions are not in use (No), the process proceeds to step S2.

  In step S <b> 2, the control unit 70 determines whether or not the call function is being used (usage state 2). When it is in the use state 2 (Yes), the process proceeds to step S3, and when it is not in the use state (No), the process returns to step S1.

  In step S <b> 3, the control unit 70 determines whether the near field communication function using the Bluetooth antenna is operated by the function operation unit 71 when the call function is used. This short-range communication function uses an external device capable of transmitting and receiving signals in the frequency band near 2.45 GHz and uses a Bluetooth antenna to transmit a voice signal related to the call function. It is operated to communicate with the external device. If it is determined that the near field communication function using the Bluetooth antenna is operating (Yes), the process proceeds to step S4, and the near field communication function using the Bluetooth antenna is not operated. When it determines (No), it progresses to step S5.

  In step S4, the control unit 70 performs antenna tuning processing. Specifically, when the resonance frequency of the main antenna 61 has been changed to a fourth predetermined frequency in step ST5 described later, the control unit 70 cancels the change and resonates the resonance frequency of the main antenna 61. The first frequency changing unit 63 is controlled so as to be tuned to the original resonance frequency fc. On the other hand, when the resonance frequency of the main antenna 61 is already fc at the start of step S4, no antenna tuning process is performed. That is, in this case, the resonance frequency fc of the main antenna 61 is maintained as it is.

  The antenna tuning process is performed or is not performed in this manner. When it is determined that the short-range communication function using the Bluetooth antenna is operated, the user uses the mobile phone device 1 such as a desk. It is highly likely that the mobile phone device 1 is placed in a state where the user is enjoying the call function using near field communication (use state 1), and the user's face is pressed against the mobile phone device 1 so that the resonance frequency fc of the main antenna 61 is It is based on the assumption that it will not go down.

  In step S5, the control unit 70 performs antenna tuning processing. Specifically, the control unit 70 changes the resonance frequency fc of the main antenna 61 to the fourth predetermined frequency on the high frequency side that is higher than the third predetermined frequency described later. 1 frequency changing unit 63 is controlled.

  As a result, the call function is activated and the face is pressed against the mobile phone device 1 (use state 2), and even if the resonance frequency fc of the main antenna 61 is lowered, the control of the control unit 70 is performed. Since the first frequency changing unit 63 changes the resonance frequency fc to the high frequency side, deterioration of the performance of the main antenna 61 is suppressed.

  In step S6, the control unit 70 determines whether or not the use of the call function is terminated. When the use of the call function is finished (Yes), the process proceeds to step S7, and when the use of the call function is not finished (No), the process returns to step S3.

  In step S7, the control unit 70 performs antenna tuning processing. Specifically, the control unit 70 controls the first frequency changing unit 63 so that the fourth predetermined frequency of the main antenna 61 changed in the step S5 is changed to the original resonance frequency fc. . On the other hand, when the resonance frequency of the main antenna 61 is already fc at the start of step S7, no antenna tuning process is performed. That is, in this case, the resonance frequency fc of the main antenna 61 is maintained as it is.

  In step S8, the control unit 70 determines whether or not the function operated by the function operation unit 71 is a short-range communication function. If it is determined that the near field communication function is operated (Yes), the process proceeds to step S9. If it is determined that the near field communication function is not operated (No), the process proceeds to step S13.

  In step S <b> 9, the control unit 70 determines whether or not the operation state of the near field communication function operated by the function operation unit 71 satisfies a predetermined condition. In the present embodiment, the control unit 70 satisfies a predetermined condition based on whether or not the short-range communication function operated by the functional operation unit 71 is a short-range communication function using a Bluetooth antenna. It is determined whether or not it has been done. If it is determined that the short-range communication function using the Bluetooth antenna is not operated (other functions are operated) (Yes), it is determined that the predetermined condition is satisfied, and step S10 is performed. Proceed to When it is determined that the short-range communication function using the Bluetooth antenna is operated (No), the user holds the mobile phone device 1 in his hand and looks at the display unit 72 or operates the operation key group 11. It is presumed that the face is not pressed and is not in a state of being operated (presumed to be in use state 1), so that the resonance of the main antenna 61 is assumed not to satisfy the predetermined condition. Proceed to step S7 to tune the frequency to the original fc.

  In step S10, the control unit 70 performs antenna tuning processing. Specifically, the control unit 70 changes the resonance frequency fc of the main antenna 61 to the third predetermined frequency on the high frequency side that is lower than the above-described fourth predetermined frequency. 1 frequency changing unit 63 is controlled. Further, the second frequency changing unit 93 is controlled so as to change the resonance frequency fd of the short-range communication antenna 91 to the high frequency side.

  The antenna tuning process is performed when the user determines that the short-distance communication function different from the short-distance communication function using the Bluetooth antenna is operating. There is a high possibility that the user is enjoying the short-range communication function with the hand (use state 2), and the resonance frequency fc of the main antenna 61 is not as high as the state in which the mobile phone device 1 is pressed against the face. This is based on the estimation that the resonance frequency fd of the short-range communication antenna 91 may be lowered to the low frequency side.

  As a result, even if the short-range communication function is operated and the cellular phone device 1 is held in the hand, the resonance frequency fc of the main antenna 61 and the resonance frequency fd of the short-range communication antenna 91 are lowered. Under the control, the first frequency changing unit 63 changes the resonance frequency fc to the high frequency side, and the second frequency changing unit 93 changes the resonance frequency fd of the short-range communication antenna 91 to the high frequency side. Therefore, deterioration of the performance of the main antenna 61 and the short-range communication antenna 91 is suppressed.

  In step S11, the control unit 70 determines whether or not the use of the short-range communication function is terminated. If the near field communication function has been terminated (Yes), the process proceeds to step S12. If the near field communication function has not been terminated (No), step S11 is repeated.

  In step S12, the control unit 70 performs antenna tuning processing. Specifically, the control unit 70 controls the first frequency changing unit 63 so that the third predetermined frequency of the main antenna 61 changed in the step S10 is changed to the basic resonance frequency fc. . Similarly, the second frequency changing unit 93 is controlled so that the frequency of the short-range communication antenna 91 changed to the high frequency side in the step S10 is changed to the original resonance frequency fd.

  In step S13, the control unit 70 performs antenna tuning processing. Specifically, the control unit 70 changes the resonance frequency fc of the main antenna 61 to the third predetermined frequency on the high frequency side that is lower than the above-described fourth predetermined frequency. 1 is controlled (however, in this case, since the near field communication function is not used, unlike the step S10, the resonance frequency fd of the near field communication antenna 91 is changed to the high frequency side). The second frequency changing unit 93 is not controlled.

  The antenna tuning process is performed in this way when it is determined that other functions different from the near field communication function such as the web function and the mail function are operated, the user holds the cellular phone device 1 in hand. The resonance frequency fc of the main antenna 61 is low, although it is not as high as the state where the mobile phone device 1 is pressed against the face. This is based on the assumption that there is a risk of falling to the side.

  As a result, even if other functions different from the near field communication function such as the web function and the mail function are operated and the mobile phone device 1 is held in the hand, the resonance frequency fc of the main antenna 61 is lowered. Under the control of the control unit 70, the first frequency changing unit 63 changes the resonance frequency fc to the high frequency side, so that deterioration of the radiation efficiency of the main antenna 61 is suppressed.

  In step S14, the control unit 70 determines whether or not the use of other functions different from the near field communication functions such as the web function and the mail function is finished. If the use of other functions different from the near field communication function such as the web function and the mail function has been terminated (Yes), the process proceeds to step S15, and if not terminated (No), the process proceeds to step S14. repeat.

  In step S15, the control unit 70 performs antenna tuning processing. Specifically, the control unit 70 controls the first frequency changing unit 63 so that the third predetermined frequency of the main antenna 61 changed in the step S13 is changed to the original resonance frequency fc. .

  As shown in FIG. 2, the function operation unit 71 operates a function accompanied by sound notification by an external sound notification device 80 (for example, an earphone used when listening to music or an external speaker). It may be configured.

  In this way, in a state where the external audio notification device 80 is used, the mobile phone device 1 is held by a user and a certain operation is performed so that the external audio notification device 80 is used. After that, it is estimated that it is placed on a desk or the like and is not held by the user's hand (close to use state 1).

  In the case of such a configuration, the control unit 70 causes the function operation unit 71 to perform such external audio while the first frequency changing unit 63 has changed the resonance frequency fc of the main antenna 61 to the high frequency side. When a function involving voice notification by the notification device 80 is operated, the first frequency change is performed so that the frequency changed to the high frequency side is changed to the low frequency side (for example, the original resonance frequency fc of the main antenna 61). The unit 63 is controlled.

  Next, a specific configuration example of the first frequency changing unit 63 will be described. Note that the basic principle and basic aspect of the second frequency changing unit 93 are the same as those of the first frequency changing unit 63, and thus the description thereof is omitted.

<Configuration example 1>
As shown in FIG. 4, the first frequency changing unit 63A has a predetermined inductance, and the matching coil 100 of the main antenna 61 and the switching element 101 are configured in series. Note that the switching element 101 is configured by, for example, a field effect transistor (FET).

  The control unit 70 changes the resonance frequency fc of the main antenna 61 by setting the switching element 101 to the ON state or the OFF state according to the use state.

  In addition, by using a configuration having a plurality of combinations of the coil 100 and the switching element 101, the resonance frequency fc of the main antenna 61 can be changed in multiple stages. In the configuration example 1, the constituent element of the first frequency changing unit 63A is the coil 100, but is not limited thereto, and may be a capacitor.

<Configuration example 2>
Further, as shown in FIG. 5, the first frequency changing unit 63B has a predetermined capacity, and a matching capacitor 102 of the main antenna 61 and a varicap diode 103 are configured in series connection.

  The control unit 70 supplies a reverse bias voltage to the varicap diode 103 according to the usage state. The capacitance of the varicap diode 103 varies according to the voltage value of the reverse bias voltage supplied from the control unit 70. Therefore, the resonance frequency fc of the main antenna 61 is changed according to the voltage value applied to the varicap diode 103 by the control unit 70.

<Configuration example 3>
Further, as shown in FIG. 6, the first frequency changing unit 63C includes a first switch unit 104 that switches a signal supplied from the first communication processing unit 62, a first element 105, and a second element. The element 106, the third element 107, and the second switch unit 108 that switches signals supplied from the first element 105 to the third element 107 are configured. The first element 105, the second element 106, and the third element 107 are configured to have different circuit constants.

  The control unit 70 performs switching control in conjunction with the first switch unit 104 and the second switch unit 108 according to the use state. For example, the control unit 70 switches between the first switch unit 104 and the second switch unit 108 so that the first element 105 is selected in the use state 1, and in the use state 2, The first switch unit 104 and the second switch unit 108 are switched so that the element 106 is selected. When in the use state 3, the first switch unit 104 and the second switch unit 108 are selected so that the third element 107 is selected. 2 switch unit 108 is switched.

Thus, the cellular phone device 1 according to the present invention controls the first frequency changing unit 63 so as to change the resonance frequency of the main antenna 61 in accordance with the function operating state of the function operating unit 71. 70, so that the first antenna resonance can be always obtained based on the use state by the user derived from the operation state of the function without complicating the structure. The frequency can be changed (tuned). Also,
In addition, since the mobile phone device 1 according to the present invention does not require a detector for detecting the usage state by the user, the structure can be simplified.

  In the present embodiment, the use state is simplified to three states. However, the present invention is not limited to this, and the configuration in which the resonance frequency fc of the main antenna 61 is suitably changed in three or more use states. It may be.

  In this embodiment, in step S9, the control unit 70 determines whether or not the short-range communication function operated by the function operation unit 71 is a short-range communication function using a Bluetooth antenna. However, the present invention is not limited to this, and it is determined whether or not the predetermined condition is satisfied based on whether or not other conditions are satisfied. You may judge. For example, when the operation time of the near field communication function operated by the function operation unit 71 is equal to or shorter than a predetermined time, the control unit 70 is estimated that the user holds the mobile phone device 1 in his / her hand. When it is determined that the predetermined condition is satisfied and the operation time of the near field communication function operated by the function operation unit 71 is longer than the predetermined time, the user holds the mobile phone device 1 in hand. Since it is estimated that it does not have, it may be determined that a predetermined condition is not satisfied.

  Alternatively, in the case where the mobile phone device 1 has an acceleration detection unit as conventionally known, when the acceleration detected by the acceleration detection unit is equal to or higher than a predetermined acceleration, the control unit 70 allows the user to Since it is estimated that the device 1 is held in the hand, it is determined that the predetermined condition is satisfied, and when the acceleration is smaller than the predetermined acceleration, it is estimated that the user does not hold the mobile phone device 1 in the hand. Therefore, it may be determined that a predetermined condition is not satisfied.

  Further, the control unit 70 determines whether or not the mobile phone device 1 can be installed on a specific table (for example, a charging table for charging the rechargeable battery 74) and whether or not the mobile phone device 1 is installed on the table. In the case where the mobile phone device 1 is configured to be detectable, the control unit 70 estimates that the user has the mobile phone device 1 in his / her hand when it is not detected that the mobile phone device 1 is installed on the table. Therefore, when it is determined that the predetermined condition is satisfied and it is detected that the mobile phone device 1 is installed on the cradle, it is estimated that the user does not hold the mobile phone device 1 in his / her hand. Therefore, it may be determined that the predetermined condition is not satisfied.

It is a perspective view which shows the external appearance of the mobile telephone apparatus which concerns on this invention. It is a block diagram which shows the function of the mobile telephone apparatus which concerns on this invention. It is a flowchart with which it uses for description about operation | movement of the control part with which the mobile telephone apparatus which concerns on this invention is equipped. It is a figure which shows the 1st structure of the frequency change part with which the mobile telephone apparatus which concerns on this invention is equipped. It is a figure which shows the 2nd structure of the frequency change part with which the mobile telephone apparatus which concerns on this invention is equipped. It is a figure which shows the 3rd structure of the frequency change part with which the mobile telephone apparatus which concerns on this invention is equipped.

Explanation of symbols

11 Operation key group (operation means)
60 communication unit 63 frequency change unit (first frequency change means)
70 Control unit (control means)
71 Function operation part (Function operation means)
72 Display section (display means)
73 Voice notification section (voice notification means)
80 voice notification device 90 second communication unit 93 second frequency change unit

Claims (15)

A first antenna that resonates at a first predetermined frequency;
First frequency changing means for changing the first predetermined frequency;
Function operating means for operating a predetermined function;
And a control unit that controls the first frequency changing unit so as to change the first predetermined frequency in accordance with an operation state of a function by the function operating unit.   The control means controls the first frequency changing means to change the first predetermined frequency to a high frequency side when a specific function is operated by the function operating means. The communication device according to claim 1. Having a display means;
The function operating means is configured to operate a function involving display by the display means,
The control means controls the first frequency changing means so as to change the first predetermined frequency to a high frequency side when a function accompanied by display by the display means is operated by the function operating means. The communication device according to claim 1, wherein the communication device is a device. Having operating means;
The function operation means is configured to operate a function accompanied by an operation by the operation means,
The control means controls the first frequency changing means so as to change the first predetermined frequency to a high frequency side when a function accompanied by an operation by the operating means is operated by the function operating means. The communication device according to claim 1, wherein the communication device is a device. A second antenna that resonates at the second predetermined frequency;
The function operating means is configured to operate a near field communication function using a radio wave transmitted and received by the second antenna,
The control means controls the first frequency changing means to change the first predetermined frequency to a high frequency side when the near field communication function is operated by the function operating means. The communication device according to claim 1 or 2. Having voice notification means,
The function operating means is configured to operate a function accompanied by voice notification by the voice notification means,
The control means controls the first frequency changing means to change the first predetermined frequency to a high frequency side when a function accompanied by voice notification by the voice notification means is operated by the function operating means. The communication device according to claim 1, wherein the communication device is controlled. Display means or operation means;
Voice notification means,
The function operation means is configured to operate a function involving display by the display means or a function involving operation by the operation means, and a function involving voice notification by the voice notification means,
The control means sets the first predetermined frequency to a third predetermined frequency when a function accompanied by display by the display means or a function accompanied by an operation by the operation means is operated by the function operation means. The first frequency changing means is controlled to change to the higher frequency side up to the frequency of the first frequency, and when the function with voice notification by the voice notification means is operated by the function operation means, the first predetermined frequency 3. The first frequency changing means is controlled to change the first frequency changing means to a high frequency side up to a fourth predetermined frequency higher than the third predetermined frequency. The communication device described.   8. The function involving voice notification by the voice notification means operated by the function operation means is a call function using radio waves transmitted and received by the first antenna. The communication device described in 1. The function operating means is configured to operate a function involving voice notification by an external voice notification device,
The control means is configured such that when the first predetermined frequency is changed to the high frequency side by the first frequency changing means, a function accompanied by voice notification by the voice notification device is operated by the function operating means. 9. The first frequency changing unit is controlled to change the frequency changed to the high frequency side to the low frequency side. Communication equipment.   The control means is configured such that when the first predetermined frequency is changed to the high frequency side by the first frequency changing means, a function accompanied by voice notification by the voice notification device is operated by the function operating means. 10. The communication apparatus according to claim 9, wherein the first frequency changing unit is controlled to change the frequency changed to the high frequency side to the first predetermined frequency.   The control unit changes the first predetermined frequency to a high frequency side when the predetermined condition is satisfied when the short-range communication function is operated by the functional operation unit, and the predetermined condition is changed to the high frequency side. 6. The communication device according to claim 5, wherein if the frequency is not satisfied, the first frequency changing unit is controlled so as not to change the first predetermined frequency to a high frequency side. The short-range communication function includes a Bluetooth (trademark) function and another function different from the Bluetooth function.
The control means changes the first predetermined frequency to a high frequency side assuming that the predetermined condition is satisfied when the other function is operated by the functional operation means, and the functional operation means When the Bluetooth function is operated, the first frequency changing unit is controlled so that the first predetermined frequency is not changed to a high frequency side on the assumption that the predetermined condition is not satisfied. The communication apparatus according to claim 11. A second frequency changing means for changing the second predetermined frequency;
The control means controls the second frequency changing means to change the second predetermined frequency to a high frequency side when the short-range communication function is operated by the function operating means; The communication device according to claim 5, wherein:   The control unit changes the second predetermined frequency to a high frequency side when the predetermined condition is satisfied when the short-range communication function is operated by the functional operation unit, and the predetermined condition is changed to the high frequency side. 14. The communication device according to claim 13, wherein, if not satisfied, the second frequency changing unit is controlled not to change the second predetermined frequency to a high frequency side. The short-range communication function includes a Bluetooth function and another function different from the Bluetooth function.
The control means changes the second predetermined frequency to a high frequency side assuming that the predetermined condition is satisfied when the other function is operated by the functional operation means, and the functional operation means The second frequency changing means is controlled so as not to change the second predetermined frequency to a high frequency side, assuming that the predetermined condition is not satisfied when a Bluetooth function is operated. Item 15. The communication device according to Item 14.