CN101409570A - Communication equipment - Google Patents

Abstract

There is provided a communication device capable of ensuring good performance of the first antenna without complicating the structure. It has a main antenna (61) for transmitting and receiving radio waves of a first predetermined frequency (resonant frequency fc), a first frequency changing unit (63) for changing the first predetermined frequency, and a function operating unit (71) for operating a predetermined function. A control unit (70) that controls a first frequency changing unit (63) to change a first predetermined frequency by the operating state of the function of the function operating unit (71). For example, the control unit (70) controls the first frequency changing unit (63) to change the first predetermined frequency to the high frequency side when the function operating unit (71) operates the specific function.

Description

communication device

technical field

The invention relates to a communication device with an antenna.

Background technique

In recent years, various applications such as a mail function, an Internet browsing function, a video phone function, and the like are mounted on communication devices in addition to a call function.

Here, the state of use differs depending on the type of application program activated on the communication device. For example, when using the call function, the user holds the communication device and buckles it on the ear and mouth at the same time. In addition, when using the mail function and the Internet browsing function, the user holds the communication device while manually operating the operation unit.

However, if the user operates the operation unit in this way, the hand will cover the part where the antenna is built.

Thus, if the hand covers the wiring part of the antenna, the resonant frequency of the antenna will be lowered, and the performance of the antenna will be deteriorated.

In order to avoid the deterioration of antenna performance in this usage state, various techniques have been proposed

(For example, refer to Patent Document 1 or 2)

Patent Document 1: JP-A-2004-179995

Patent Document 2; JP-A-2004-363863

However, in Patent Document 1 and Patent Document 2, it is a technique of selecting an antenna suitable for communication from a plurality of antennas by providing a sensor for sensing human body touch, and this cannot avoid a complicated structure.

Contents of the invention

In the present invention, in view of the above problems, one of its objects is to provide a communication device that can ensure good antenna performance without complicating the configuration.

In order to solve the above problems, the communication device of the present invention is characterized in that it has:

a first antenna resonating at a first specified frequency;

a first frequency changing device for changing the first prescribed frequency;

Functional actuation means for actuating a specified function; and

The control means for changing the first predetermined frequency is controlled by controlling the first frequency changing means based on the operating state of the function of the functional operating means.

In addition, in the communication device according to the present invention, it is preferable that the control means controls the first frequency changing means to change the first predetermined frequency to the high frequency side when the specific function is activated by the function operating means. .

In addition, in the communication device described above, it is preferable to have a display device,

The function operation means is configured to operate a function accompanying the display of the display device,

The control means controls the first frequency changing means to change the first predetermined frequency to a high frequency side when the function operating means operates a function accompanying the display on the display means.

In addition, the above-mentioned communication device preferably has an operating device,

The function operating means is configured to operate a function accompanying the operation of the operating means,

The control means controls the first frequency changing means to change the first predetermined frequency to a high frequency side when the function operating means operates a function accompanying the operation of the operating means.

In addition, in the above-mentioned communication device, it is preferable to have a second antenna resonating at a second predetermined frequency,

The function operating device is configured to operate a short-distance communication function using radio waves transmitted and received by the second antenna,

When the short-distance communication function is activated by the functional operating means, the control means controls the first frequency changing means to change the first predetermined frequency to a high frequency side.

In addition, in the above-mentioned communication equipment, it is preferable to have a voice notification device,

The function operation means is configured to operate the function accompanied by the voice notification of the voice notification means,

When the function operating means activates the function accompanied by the voice notification of the voice notification means, the control means controls the first frequency changing means to change the first predetermined frequency to the high frequency side. .

In addition, in the above-mentioned communication device, it is preferable to have a display device or an operation device, and a voice notification device,

The function operation means is configured to operate a function accompanied by a display on the display device, a function accompanied by an operation of the operation device, and a function accompanied by a voice notification by the voice notification device,

The control device controls the first frequency changing device when the function operation device operates a function accompanying the display of the display device or the function operation device operates a function accompanying the operation of the operation device. , changing the first specified frequency to a third specified frequency on the high frequency side; when the function operating device is used to activate the function of the voice notification accompanying the voice notification device, the first frequency is controlled The changing means changes the first predetermined frequency to a fourth predetermined frequency on the high frequency side that is higher than the third predetermined frequency.

In addition, in the above-mentioned communication device, preferably, the function operated by the function operating means accompanying the voice notification by the voice notification means is a call function using radio waves transmitted and received by the first antenna.

In addition, in the above-mentioned communication device, preferably, the function operation means is configured to operate the function of the voice notification accompanying the external voice notification device,

In the state where the first predetermined frequency is changed to the high frequency side by the first frequency changing means, when the function operation means operates the function accompanying the voice notification of the voice notification device, the The control means controls the first frequency changing means to change the frequency changed to the high frequency side to the low frequency side.

In addition, in the above-mentioned communication device, preferably, in the state where the first predetermined frequency is changed to the high frequency side by the first frequency changing means, the function operation means is used to make the voice notification When the voice notification function of the device is in operation, the control means controls the first frequency change means to change the frequency changed to the high frequency side to the first predetermined frequency.

In addition, in the above-mentioned communication device, the control means controls the first frequency change means such that when a predetermined condition is satisfied when the short-distance communication function is activated by the function activation means, the first frequency change means is set to The predetermined frequency is changed to the high frequency side, and the first predetermined frequency is not changed to the high frequency side when the predetermined condition is not satisfied.

In addition, in the above-mentioned communication device, preferably, the short-distance communication function includes a Bluetooth function (registered trademark) and other functions other than the Bluetooth function,

The control device controls the first frequency changing device so that the first predetermined frequency is changed to the high frequency side so that the predetermined condition is satisfied when the other function is operated by the function operating device. When the Bluetooth function is activated by the function operating device, the first predetermined frequency is not changed to a high frequency side unless the predetermined condition is satisfied.

In addition, in the above-mentioned communication device, preferably, there is second frequency changing means for changing the second predetermined frequency,

When the short-distance communication function is activated by the function operating means, the control means controls the second frequency changing means to change the second predetermined frequency to a high frequency side.

In addition, in the communication device described above, preferably, the control means controls the second frequency change means so that when a predetermined condition is satisfied when the short-distance communication function is activated by the function activation means, the The second predetermined frequency is changed to the high frequency side, and the second predetermined frequency is not changed to the high frequency side when the predetermined condition is not satisfied.

In addition, in the above-mentioned communication device, preferably, the short-distance communication function includes a Bluetooth function and other functions different from the Bluetooth function,

The control means controls the second frequency changing means so that when the other function is activated by the function operating means, the predetermined condition is satisfied and the second predetermined frequency is changed to a high frequency side. When the Bluetooth function is activated by the function operating device, the second predetermined frequency is not changed to a high frequency side unless the predetermined condition is satisfied.

Invention effect

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

Description of drawings

FIG. 1 is a perspective view showing the appearance of a mobile phone device according to the present invention.

Fig. 2 is a block diagram showing the functions of the mobile phone device of the present invention.

FIG. 3 is a flowchart for describing the operation of a control section included in the mobile phone device of the present invention.

Fig. 4 is a diagram showing a first configuration of a frequency changing unit included in the mobile phone device of the present invention.

Fig. 5 is a diagram showing a second configuration of a frequency changing unit included in the mobile telephone device of the present invention.

Fig. 6 is a diagram showing a third configuration of a frequency changing unit included in the mobile phone device of the present invention.

symbol description

11 operation key group (operating device)

60 Ministry of Communications

63 frequency changing unit (first frequency changing device)

70 control part (control device)

71 Functional Action Unit (Functional Action Device)

72 display unit (display device)

73 Voice Notification Department (Voice Notification Device)

80 voice notification equipment

90 Second Ministry of Communications

93 Second Frequency Change Department

Detailed ways

Next, embodiments of the present invention will be described.

FIG. 1 is an external perspective view showing a mobile phone device 1 as an example of the communication device of the present invention. Wherein, in the following, although a mobile phone device is described, the present invention is not limited thereto, and a device having a camera function and a communication function is also possible, for example, PHS (Personal Handyphone System), PDA (Personal Digital Assistant ), portable navigation devices, laptops are also acceptable.

The mobile phone device 1 is composed of an operation unit side housing 2 and a display unit side housing 3 . The operation part side body part 2 is constituted by including a group of operation keys 11 on the surface part 10 and a microphone 12 for inputting the voice generated by the user of the mobile phone device 1 during a call. The operation key group 11 includes function setting operation buttons 13 for operating various settings, various functions such as a telephone book function and a mail function, and input operation buttons 14 for inputting numbers of a telephone number and letters such as an e-mail, etc. , and a confirmation operation button 15 for performing various operations such as confirmation and scrolling.

In addition, the display unit side body unit 3 is configured to include a display 21 for displaying various information on the surface unit 20, a voice output unit 22 for outputting the voice of the communication partner, and a CCD (Charge Coupled Device) camera for photographing an object, etc. An imaging unit 23 and a speaker 24 for outputting music and the like to the outside.

In addition, since the imaging direction of the imaging unit 23 is perpendicular to the display surface of the surface unit 20, when the person holding and operating the mobile phone device 1 faces the display 21 from the front, the imaging direction faces the direction of the person's face. In addition, the imaging unit 23 may be provided on the front surface portion 10 of the operation side housing portion 2 instead of being provided on the display unit side housing portion 3 . In this case, the imaging direction of the imaging unit 23 may be a direction facing the face of a person holding and operating the mobile phone device 1 .

In addition, the upper end portion of the operation portion side frame portion 2 and the lower end portion of the display portion side frame portion 3 may be connected by a hinge mechanism 4 . In addition, the mobile phone device 1 can relatively rotate the operation part side frame body part 2 and the display part side frame body part 3 connected by the hinge mechanism 4, so that the operation part side frame body part 2 and the display part side frame body part 3 are connected to each other. It is in an open state (open state), or the operation portion side frame portion 2 and the display portion side frame portion 3 may be in a folded state (folded state).

In addition, although FIG. 1 shows an embodiment of a so-called foldable mobile phone, the form of the mobile phone device according to the present invention is not limited to this, and it is also possible to operate the non-operation side frame body part 2 and the display part side frame body. A sliding method in which part 3 slides along one frame in one direction from the overlapped state, or the operation part side frame part 2 and display part side frame part 3 rotate one frame around the axis along the overlapping direction The rotary type (steering type), or the bar type (straight type) in which the operation part side frame body part 2 and the display part side frame body part 3 are arranged in one frame and there is no connecting part.

In addition, FIG. 2 is a functional block diagram showing the functions of the mobile phone device 1 . As shown in FIG. 2, the mobile phone device 1 includes an operation key group 11 (operation device), a first communication unit 60 for communicating with an external terminal, a second communication unit 90, a control unit 70 (control device) for performing predetermined control, A function operation part 71 (function operation device) for operating a predetermined function, a display part 72 (display device), a voice notification part 73 (voice notification device), a rechargeable battery 74 with a predetermined capacity, and a device for supplying the rechargeable battery 74 The power supply voltage is converted to a predetermined voltage, and the converted voltage is supplied to the power circuit unit 75 such as the first communication unit 60 , the second communication unit 90 , and the control unit 70 .

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 and demodulation processing, and a device for changing the resonance frequency fc of the main antenna 61. The first frequency changing unit 63 (first frequency changing means).

The main antenna 61 communicates with an external device (base station) in a frequency band around 800 MHz, for example. In addition, the main antenna 61 is also capable of supporting other frequency bands (for example, 2 GHz), and may adopt a configuration corresponding to a plurality of frequency bands.

The first communication processing part 62 demodulates and processes the signal received by the main antenna 61, and supplies the processed signal to the control part 70, on the other hand, modulates and processes the signal supplied by the control part 70, and transmits it to the outside through the main antenna 61 device (base station).

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 under the control of the control unit 70 .

The second communication unit 90 includes a short-distance 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, and a device that changes the short-distance communication antenna 91. The second frequency changing unit 93 (second frequency changing means) of the resonance frequency fd.

The short-range communication antenna 91 performs short-range communication with an external device (a device different from a base station) in a frequency band around 13.56 MHz, for example. In addition, the short-distance communication antenna 91 also has an antenna for Bluetooth (registered trademark), and enables short-distance communication with external devices in a frequency band around 2.45 GHz.

The second communication processing part 92 demodulates and processes the signal received by the short-range communication antenna 91, and supplies the processed signal to the control part 70. 91 to transmit to an external device.

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

The control unit 70 executes predetermined control over the functional operation unit 71 . Therefore, the control unit 70 can know which function is currently operating through the function operation unit 71 .

The function operating unit 71 operates a predetermined function under the control of the control unit 70 . For example, when receiving information, the function action unit 71 can enable the call function (a function using radio waves transmitted and received through the main antenna 61), the short-distance communication function (using The function of radio waves sent and received by the short-range communication antenna 91 may be operated, or the mail function or the Internet browsing function may be operated by operating the operation key group 11 .

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

The voice reporting unit 73 corresponds to the voice output unit 22 or the speaker 24 , and it reports voice to the outside under the control of the control unit 70 .

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

Here, the operation of the control section 70 will be described while referring to the flowchart of FIG. 3 . Among them, in the following, the state in which the normal standby processing function is activated by the function operation unit 71, that is, the state in which the user is estimated not to hold the mobile phone device 1, will be referred to as "use state 1", and the normal call function, etc., will be represented by the function operation unit 71. The state accompanied by the voice notification (a specific function) action of the voice notification unit 73, that is, the state in which the user holds the mobile phone device 1 against his face in order to listen to the voice notification through the voice notification unit 73 is estimated as [ Use state 2], will make prescribed function (for example, mail function, Internet browsing function, TV phone function, hands-free calling function etc. with the function of the display of display part 72, the operation of operation key group 11 by function operation part 71 function or short-distance communication function (one of any specific functions), that is, it is estimated that the user holds the mobile phone device 1 and looks at the display part 72 from a distance to operate the operation key group 11 without putting it on the face, or the user The state where the handheld mobile phone device 1 is performing short-distance communication with an external device is referred to as [usage state 3].

In addition, the control unit 70 always grasps various usage states. Now, the mobile phone device 1 is in use state 1, and the resonance frequency fc of the main antenna 61 is set to a first prescribed frequency (for example, 800 MHz).

In step S1, the control unit 70 judges whether it is in the use state of functions other than the call function, for example, whether it is in the use state of the Web function, mail function, short-distance communication function, or the like. When it is determined that these functions are in use state (use state 3) (Yes), go to step S8, and when it is determined that these functions are not in use state (No), go to step S2.

In step S2, the control unit 70 determines whether or not the call function is in use (use state 2). When it is in use state 2 (Yes), it progresses to step S3, and when it judges that it is not in use state (No), it returns to step S1.

In step S3, the control unit 70 judges whether or not the short-distance communication function using the antenna for Bluetooth is operated by the function operation unit 71 when the call function is used. This short-range communication function is a function that operates to transmit and receive voice signals related to the call function with an external device using a Bluetooth antenna, so that the call function can be used by using an external device that can transmit and receive signals in a frequency band around 2.45 GHz. When it is judged that the short-range communication function utilizing the antenna for Bluetooth is operating (Yes), proceed to step S4, and when it is determined that the short-distance communication function utilizing the antenna for Bluetooth is not activated (No), proceed to step S4. Step S5.

In step S4, the control unit 70 performs antenna tuning processing. Specifically, when the resonant frequency of the main antenna 61 is changed to the fourth predetermined frequency in step S5 described later, the control unit 70 controls the first frequency changing unit 63 so that the resonant frequency of the main antenna 61 is changed to Tune to the original resonant frequency fc. On the other hand, at the start of step S4, in the case where the resonance frequency of the main antenna 61 is fc, the antenna tuning process is not particularly performed. That is, in this case, the resonance frequency fc of the main antenna 61 is still maintained.

Execution or non-execution of this antenna tuning process is based on the assumption that the user places the mobile phone device 1 on a table, for example, and intends to perform the call function using the short-distance communication when it is determined that the short-distance communication function is activated using the antenna for Bluetooth. The possibility of the state (using state 1) is relatively high, and the resonant frequency fc of the main antenna 61 will not be lowered even if the mobile phone device 1 is attached to the user's face.

In step S5, the control unit 70 executes antenna tuning processing. Specifically, the control unit 70 controls the first frequency changing unit 63 to change the resonance frequency fc of the main antenna 61 to a fourth predetermined frequency on the high frequency side that is higher than a third frequency described later.

Thus, in the state where the call function is activated and the mobile phone device 1 is placed on the face (use state 2), although the resonant frequency fc of the main antenna 61 is lowered, under the control of the control unit 70, due to the second A frequency changer 63 changes the resonant frequency fc to the high frequency side, so performance degradation of the main antenna 61 can be suppressed.

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

In step S7, the control unit 70 executes antenna tuning processing. Specifically, the control unit 70 controls the first frequency changing unit 63 to change the fourth predetermined frequency of the main antenna 61 changed in the process of step S5 to the original resonance frequency fc. On the other hand, at the start of step S7, in the case where the resonance frequency of the main antenna 61 is already fc, the antenna tuning process is not particularly performed. That is, in this case, the resonance frequency of the main antenna 61 is still maintained at fc.

In step S8, the control part 70 judges whether the function operated by the function operation part 71 is a short-distance communication function. When it is determined that the short-distance communication function is activated (Yes), the process proceeds to step S9, and when it is determined that the short-distance communication function is not activated (No), the process proceeds to step S13.

In step S9, the control unit 70 judges whether or not the operating state of the short-range communication function operated by the function operating unit 71 satisfies a predetermined condition. In this embodiment, the control unit 70 determines whether a predetermined condition is satisfied based on whether the short-range communication function operated by the function operating unit 71 is a short-range communication function using a Bluetooth antenna. Then, when it is judged that the short-distance communication function using the Bluetooth antenna is not operating (other functions are operating) (Yes), the predetermined condition is satisfied, and the process proceeds to step S10. When it is determined that the short-distance communication function using the Bluetooth antenna is activated (No), it is estimated that the user is not holding the mobile phone device 1 and operating the operation key group 11 by looking at the display unit 72 from a distance. It is in the state of sticking to the face (estimated to be the use state 1), so the predetermined condition is not satisfied, and the resonant frequency of the main antenna 61 is tuned to the original fc, and the process proceeds to step S7.

In step S10, the control unit 70 executes antenna tuning processing. Specifically, the control unit 70 controls the first frequency changing unit 63 to change the resonance frequency fc of the main antenna 61 to a third predetermined frequency on the high frequency side that is lower than the fourth predetermined frequency. In addition, the second frequency changing unit 93 is controlled to change the resonance frequency fd of the short-range communication antenna 91 to the high-frequency side.

Such execution of the antenna tuning process is based on the assumption that the user holds the mobile phone device 1 and wants to perform short-distance communication when it is determined that a short-distance communication function different from the short-distance communication function using the Bluetooth antenna is operating. The state of function (use state 2) is highly likely, and even in the state where the mobile phone device 1 is not pushed to the face, the resonance frequency fc of the main antenna 61 and the resonance frequency fd of the short-distance communication antenna 91 are lowered. Danger to the low frequency side.

In this way, even if the short-distance communication function is activated and the mobile phone device 1 is held in hand, the resonant frequency fc of the main antenna 61 and the resonant frequency fd of the short-distance communication antenna 91 are lowered. Since the resonant frequency fc of the main antenna 61 and the short-distance communication antenna 91 is changed to the high-frequency side by the second frequency changing unit 93, the performance of the main antenna 61 and the short-distance communication antenna 91 can be suppressed. deterioration.

In step S11, the control unit 70 determines whether or not the use of the short-range communication function has ended. When the short-distance communication function is completed (Yes), proceed to step S12, and when the short-distance communication function is not completed (No), step S11 is repeated.

In step S12, the control unit 70 executes antenna tuning processing. Specifically, the control unit 70 controls the first frequency changing unit 63 to change the third predetermined frequency of the main antenna 61 changed in the process of step S10 to the basic resonance frequency fc. In addition, similarly, the second frequency changing unit 93 is controlled to change the frequency of the short-distance communication antenna 91 changed to the high-frequency side in the process of step S10 to the original resonance frequency fd.

In step S13, the control unit 70 executes antenna tuning processing. Specifically, the control unit 70 controls the first frequency changing unit 63 to change the resonance frequency fc of the main antenna 61 to a third predetermined frequency on the high frequency side that is lower than the fourth predetermined frequency. However, in this case, since the short-range communication function is not used, the second frequency changing unit 93 is controlled so as not to change the resonance frequency fd of the short-range communication antenna 91 to the high-frequency side, unlike step S10.

Such execution of the antenna tuning process is based on the assumption that when it is determined that a function other than the short-distance communication function such as the Web function and the mail function is to be operated, the user holds the mobile phone device 1 and wants to execute the function. The possibility of the state (use state 2) is high, and the resonance frequency fc of the main antenna 61 may drop to the low frequency side even in the state where the mobile phone device 1 is not pressed against the face.

In this way, even if the resonant frequency fc of the main antenna 61 is lowered due to holding the mobile phone device 1 while operating other functions other than the short-distance communication function such as the Web function and the mail function, due to the control of the control unit 70, the first The frequency changing unit 63 changes the resonance frequency fc to the high frequency side, thereby suppressing deterioration of the radiation efficiency of the main antenna 61 .

In step S14 , the control unit 70 determines whether or not the use of functions other than the short-distance communication functions such as the Web function and the mail function has ended. When the use of functions other than the short-distance communication functions such as the Web function and the mail function is completed (Yes), proceed to step S15, and when not completed (No), repeat step S14.

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

In addition, as shown in FIG. 2 , the function operating unit 71 may be configured to operate a function accompanied by a voice notification from the external voice notification device 80 (for example, earphones used for listening to music, external speakers, etc.).

In this way, in the state of using the external voice notification device 80, the mobile phone device 1 is held by the user, and a certain operation is performed to use the external voice notification device 80, and thereafter, it is placed on a table or the like, thereby presuming that it is in the absence The state held by the user (closer to use state 1).

In the case of such a configuration, the control unit 70 makes the external voice notification device accompanied by such an external voice notification through the function operation unit 71 under the state where the resonant frequency fc of the main antenna 61 is changed to the high-frequency side by the first frequency changing unit 63. When the voice notification function of 80 is in operation, the first frequency changing unit 63 is controlled to change the frequency changed to the high frequency side to the low frequency side (for example, the original resonance frequency fc of the main antenna 61).

Next, the specific structure of the first frequency changing unit 63 will be described. Here, as for the second frequency changing unit 93, since its basic principle and basic form are the same as those of the first frequency changing unit 63, its description is omitted.

<Structure example 1>

As shown in FIG. 4 , the first frequency changing unit 63A has a predetermined inductance, and is configured by connecting a matching coil 100 of the antenna 61 and a switching element 101 in series. Among them, the switching element 101 can be constituted by, for example, a FET (Field Effect Transistor).

The control unit 70 changes the resonance frequency of the main antenna 61 by turning the switching element 101 on or off according to the state of use.

Among them, the resonance frequency fc of the main antenna 61 can be changed in multiple steps by configuring a combination of a plurality of coils 100 and switching elements 101 . In addition, in Structural Example 1, although the coil 100 is used as a constituent element of the first frequency changing unit 63A, it is not limited thereto, and may be a capacitor.

<Structure example 2>

In addition, as shown in FIG. 5 , the first frequency changing unit 63B has a predetermined capacity, and is configured by connecting the matching capacitor 102 of the main antenna 61 and the varactor diode 103 in series.

The control unit 70 supplies a reverse bias voltage to the varactor diode 103 according to the state of use. The varactor diode 103 has a variable capacity according to the voltage value of the reverse bias voltage supplied from the control unit 70 . Therefore, the resonant frequency fc of the main antenna 61 can be changed according to the voltage value applied to the varactor diode 103 by the control unit 70 .

<Structure example 3>

In addition, as shown in FIG. 6 , the first frequency changing unit 63C uses the first switch unit 104 for switching the signal supplied from the first communication processing unit 62 , the first element 105 , the second element 106 , the third element 107 , and a second switch unit 108 for switching signals supplied from the first element 105 to the third element 107 . The first element 105, the second element 106, and the third element 107 are configured by having different circuit constants, respectively.

The control unit 70 controls switching of the first switch unit 104 and the second switch unit 108 in conjunction with the use state. For example, when using state 1, the control part 70 switches the first switch part 104 and the second switch part 108 to select the first element 105, and when using the state 2, switches the first switch part 104 and the second switch part 108 To select the second element 106 , in the use state 3 , switch the first switch part 104 and the second switch part 108 to select the third element 107 .

In this way, the mobile phone device 1 of the present invention includes the control unit 70, the control unit 70 is used to control the first frequency changing unit 63, and changes the resonant frequency of the main antenna 61 according to the operating state of the function of the function operating unit 71. The structure is complicated, and the resonant frequency of the first antenna can be changed (tuned) based on the user's use state guided by the operating state of the function, and appropriate performance of the first antenna can always be obtained.

In addition, since the mobile phone device 1 of the present invention does not require a detector for detecting the usage state of the user, the structure can be simplified.

In addition, in this embodiment, although the state of use is simplified to three states, the present invention is not limited thereto, and the resonant frequency fc of the main antenna 61 may be appropriately changed in three or more states of use.

In addition, in the present embodiment, in step S9, the controller 70 judges whether a predetermined condition is satisfied based on whether the short-distance communication function operated by the function operation 71 is a short-distance communication function using a Bluetooth antenna. The invention is not limited thereto, and whether a predetermined condition is satisfied may be determined based on whether other conditions are satisfied. For example, when the operation time of the short-distance communication function operated by the function operation unit 71 is less than a predetermined time, the control unit 70 estimates that the user is holding the mobile phone device 1, so it determines that the predetermined condition is satisfied, and the function When the operation time of the short-distance communication function operated by the operation unit 71 is longer than the predetermined time, it may be determined that the predetermined condition is not satisfied because it is presumed that the user does not hold the mobile phone device 1 .

Alternatively, when the mobile phone device 1 has a conventionally known acceleration detection unit, the control unit 70 presumes that the user is holding the mobile phone device 1 when the acceleration detected by the acceleration detection unit is greater than a predetermined acceleration, so it determines The predetermined condition is satisfied, and when the acceleration is smaller than the predetermined acceleration, it is presumed that the user does not hold the mobile phone device 1 , so it may be determined that the predetermined condition is not satisfied.

Further, the mobile phone device 1 may be configured to be installed on a specific stand (for example, a charging stand for charging the rechargeable battery 74), and the mobile phone device 1 may be configured so that the control unit 70 can detect whether the mobile phone device 1 is set on the stand or not. In this case, when the control unit 70 does not detect that the mobile phone device 1 is placed on the stand, it is estimated that the user is holding the mobile phone device 1, so it is judged that the predetermined condition is satisfied, and when it is detected that the mobile phone device 1 is set on the stand When it is estimated that the user does not hold a mobile phone device, it can be determined that the prescribed condition is not satisfied.

Claims (15)

1. A communication device, characterized in that it has: a first antenna resonating at a first specified frequency; a first frequency changing device for changing the first prescribed frequency; Functional actuation means for actuating a specified function; and The control means for changing the first predetermined frequency is controlled by controlling the first frequency changing means based on the operating state of the function of the functional operating means. 2. The communication device according to claim 1, characterized in that, When the specific function is activated by the function operating means, the control means controls the first frequency changing means to change the first predetermined frequency to a high frequency side. 3. A communication device according to claim 1 or 2, characterized in that having a display device, The function operation means is configured to operate a function accompanying the display of the display device, The control means controls the first frequency changing means to change the first predetermined frequency to a high frequency side when the function operating means operates a function accompanying the display on the display means. 4. Communication device according to claim 1 or 2, characterized in that with an operating device, The function operating means is configured to operate a function accompanying the operation of the operating means, The control means controls the first frequency changing means to change the first predetermined frequency to a high frequency side when the function operating means operates a function accompanying the operation of the operating means. 5. Communication device according to claim 1 or 2, characterized in that having a second antenna resonant at a second specified frequency, The function operating device is configured to operate a short-distance communication function using radio waves transmitted and received by the second antenna, When the short-distance communication function is activated by the functional operating means, the control means controls the first frequency changing means to change the first predetermined frequency to a high frequency side. 6. Communication device according to claim 1 or 2, characterized in that With voice notification device, The function operation means is configured to operate the function accompanied by the voice notification of the voice notification means, When the function operating means activates the function accompanied by the voice notification of the voice notification means, the control means controls the first frequency changing means to change the first predetermined frequency to the high frequency side. . 7. Communication device according to claim 1 or 2, characterized in that It has a display device or an operating device, and a voice notification device, The function operation means is configured to operate a function accompanied by a display on the display device, a function accompanied by an operation of the operation device, and a function accompanied by a voice notification by the voice notification device, The control device controls the first frequency changing device when the function operation device operates a function accompanying the display of the display device or the function operation device operates a function accompanying the operation of the operation device. , changing the first specified frequency to a third specified frequency on the high frequency side; when the function operating device is used to activate the function of the voice notification accompanying the voice notification device, the first frequency is controlled The changing means changes the first predetermined frequency to a fourth predetermined frequency on the high frequency side that is higher than the third predetermined frequency. 8. A communication device as claimed in claim 6 or 7, characterized in that The function operated by the functional operating device accompanying the voice notification by the voice notification device is a call function using radio waves transmitted and received by the first antenna. 9. The communication device according to any one of claims 1 to 8, characterized in that, The function operation means is configured to operate the function accompanied by the voice notification of the external voice notification device, In the state where the first predetermined frequency is changed to the high frequency side by the first frequency changing means, when the function operation means operates the function accompanying the voice notification of the voice notification device, the The control means controls the first frequency changing means to change the frequency changed to the high frequency side to the low frequency side. 10. The communication device according to claim 9, characterized in that, In the state where the first predetermined frequency is changed to the high frequency side by the first frequency changing means, when the function operation means operates the function accompanying the voice notification of the voice notification device, the The control means controls the first frequency changing means to change the frequency changed to the high frequency side to the first predetermined frequency. 11. The communication device according to claim 5, characterized in that, The control device controls the first frequency changing device so that the first predetermined frequency is changed to the high frequency side when a predetermined condition is satisfied when the short-distance communication function is operated by the function operating device. , if the predetermined condition is not satisfied, the first predetermined frequency is not changed to a high frequency side. 12. The communication device according to claim 11, characterized in that, The short-range communication function includes a Bluetooth function and other functions different from the Bluetooth function, The control device controls the first frequency changing device so that the first predetermined frequency is changed to the high frequency side so that the predetermined condition is satisfied when the other function is operated by the function operating device. When the Bluetooth function is activated by the function operating device, the first predetermined frequency is not changed to a high frequency side unless the predetermined condition is satisfied. 13. The communication device of claim 5, wherein: having second frequency changing means for changing the second prescribed frequency, When the short-distance communication function is activated by the function operating means, the control means controls the second frequency changing means to change the second predetermined frequency to a high frequency side. 14. The communication device according to claim 13, characterized in that, The control device controls the second frequency changing device so as to change the second predetermined frequency to the high frequency side when a predetermined condition is satisfied when the short-distance communication function is operated by the function operating device. , if the predetermined condition is not satisfied, the second predetermined frequency is not changed to the high frequency side. 15. The communication device according to claim 14, characterized in that, The short-range communication function includes a Bluetooth function and other functions different from the Bluetooth function, The control means controls the second frequency changing means so that when the other function is activated by the function operating means, the predetermined condition is satisfied and the second predetermined frequency is changed to a high frequency side. When the Bluetooth function is activated by the function operating device, the second predetermined frequency is not changed to a high frequency side unless the predetermined condition is satisfied.

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