JP2012157040A - Mobile radio terminal device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To maintain expected communication quality by stabilizing change of an antenna gain even when having a housing whose shape changes.SOLUTION: A mobile radio terminal device having a housing which can change at least into a first shape and a second shape whose antenna gain is relatively higher than that of the first shape comprises: transmission means for transmitting a radio signal amplified with a set gain; shape detection means for detecting the shape of the housing; transmission gain control means for setting a preset first gain to the transmission means in the case that the shape of the housing is the first shape and setting a second gain which is lower than the first gain to the transmission means in the case that the shape of the housing is the second shape, based on a detection result of the shape detection means; and temperature detection means for detecting temperature. The transmission gain control means sets the second gain to the transmission means in the case that the temperature being equal to or more than a threshold is detected, even when the shape of the housing is the first shape.

Description

  The present invention relates to a mobile radio terminal apparatus that performs radio communication with a base station accommodated in a network such as a mobile phone.

  Recently, mobile radio terminal devices such as mobile phones have a shape that changes depending on opening and closing, such as a clamshell type and a slide type (for example, see Patent Document 1). In such a mobile radio terminal device, there is a problem that the gain of the antenna changes for each shape because the metal or dielectric close to the built-in antenna changes.

JP 2007-019863 A

  The conventional mobile radio terminal device has a problem that when it has a casing whose shape changes, the gain of the antenna changes and the intended communication quality cannot be maintained.

  The present invention has been made to solve the above-described problem, and even when having a housing whose shape changes, mobile radio capable of stabilizing the change in antenna gain and maintaining the desired communication quality. An object is to provide a terminal device.

A mobile wireless terminal device according to an embodiment of the disclosure is:
In a mobile radio terminal apparatus having a housing that can be deformed at least into a first shape and a second shape having a relatively higher antenna gain than the first shape,
Transmitting means for amplifying and transmitting a radio signal with a set gain;
Shape detection means for detecting the shape of the housing;
Based on the detection result of the shape detection means, when the shape of the casing is the first shape, a preset first gain is set in the transmission means, while the shape of the casing is In the case of the second shape, transmission gain control means for setting a second gain lower than the first gain in the transmission means;
Temperature detecting means for detecting temperature, and
Even if the shape of the casing is the first shape, the transmission gain control means is configured to increase the second gain when the temperature detection means detects a temperature equal to or higher than a preset threshold value. Set as transmission means.

  As described above, according to the present invention, when the gain of the antenna changes with a change in the shape of the housing, the gain of the transmission means is controlled in accordance with the change.

  Therefore, according to the present invention, it is possible to provide a mobile radio terminal device that can stabilize the change in the gain of the antenna and maintain the desired communication quality even when the housing has a shape that changes.

The circuit block diagram which shows the structure of one Embodiment of the mobile radio | wireless terminal apparatus concerning this invention. The figure which looked at the mobile radio | wireless terminal apparatus shown in FIG. 1 from the side surface. 6 is a flowchart for explaining transmission gain control of the mobile radio terminal apparatus shown in FIG. 1. 5 is a flowchart for explaining reception gain control of the mobile radio terminal apparatus shown in FIG. 1. The figure for demonstrating the gain control of the mobile radio | wireless terminal apparatus shown in FIG. The figure for demonstrating the gain control of the mobile radio | wireless terminal apparatus shown in FIG.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Here, a mobile phone will be described as an example of a mobile radio terminal apparatus according to the present invention.

  FIG. 1 is a block diagram showing the configuration of a mobile radio terminal apparatus according to an embodiment of the present invention. As shown in FIG. 1, the mobile radio terminal apparatus includes, as main components, a built-in antenna 1, a radio communication unit 10, a display unit 20, a call unit 30, an operation unit 40, and a storage unit 50. , An external interface 60, a battery 70, a voltage detection unit 71, a temperature detection unit 80, an open / close detection unit 90, and a control unit 100, and a function of communicating via the base station apparatus BS and the mobile communication network NW Is provided.

  The mobile radio terminal device is a foldable mobile phone, and FIG. 2 shows a side view. As shown in FIG. 2A, this mobile radio terminal apparatus has a housing that can change its shape between an open state and a closed state as shown in FIG. 2B. Note that here, a foldable mobile phone will be described as an example. However, the present invention is not limited to a foldable mobile phone, and may be a slide mobile phone. Changes.

  The wireless communication unit 10 performs wireless communication with the base station apparatus BS accommodated in the mobile communication network NW according to an instruction from the control unit 100. The wireless communication unit 10 transmits and receives voice data and e-mail data, Web data and streaming data. Etc. are received. The built-in antenna 1 is used for transmission / reception of radio signals, and is mounted at a position where the gain changes by changing (for example, opening and closing) the shape of the mobile radio terminal device.

  The display unit 20 displays images (still images and moving images), character information, and the like under the control of the control unit 100, and visually transmits information to the user.

  The call unit 30 is connected to a speaker 31 and a microphone 32, converts user's voice input through the microphone 32 into voice data and outputs it to the control unit 100, or decodes voice data received from a call partner or the like. This is output from the speaker 31.

  The operation unit 40 includes a plurality of key switches and the like, and receives instructions from the user through this.

  The storage unit 50 includes a control program and control data of the control unit 100, application software, address data that associates the name and telephone number of a communication partner, transmitted / received e-mail data, Web data downloaded by Web browsing, download The streaming data that has been recorded is stored.

  The external interface 60 is an interface for connecting various external devices such as a hands-free kit and an external antenna.

  The battery 70 is a secondary battery using, for example, lithium ions, and accumulates electric power supplied through a charging circuit (not shown), and supplies the accumulated electric power to each unit of the mobile radio terminal apparatus as operating electric power.

  The voltage detection unit 71 detects the output voltage of the battery 70 and notifies the control unit 100 of the detected voltage.

  The temperature detector 80 is provided in the vicinity of the battery 70, detects the temperature of the mobile radio terminal device using a thermistor, and notifies the controller 100 of the detected temperature.

  The open / close detection unit 90 detects whether the mobile wireless terminal device is in an open state or a closed state, and notifies the control unit 100 of the detection result. That is, it is in a closed state as shown in FIG. 1 (b) or in a state other than that, for example, as shown in FIG. 1 (a), in a fully open state (or even a little opened state). Detect if there is.

  The control unit 100 includes a microprocessor, operates in accordance with a control program and control data stored in the storage unit 50, and controls each unit of the mobile radio terminal device to realize voice communication and data communication. is there. The control unit 100 operates in accordance with application software stored in the storage unit 50, and includes a communication control function for displaying moving images on the display unit 20 based on transmission / reception of electronic mail, Web browsing, and downloaded streaming data.

  Further, the control unit 100 detects when a device capable of connecting an external antenna such as a hands-free kit is connected to the external interface 60, and uses the external interface 60 and the external antenna instead of the built-in antenna 1. Perform wireless communication. That is, a radio signal received from the base station apparatus BS by the external antenna is output as a reception signal to the radio communication unit 10, and a radio transmission signal generated by the radio communication unit 10 is output to the external antenna through the external interface 60.

  Furthermore, the control unit 100 has a function of controlling the gains of the transmission amplifier and the reception amplifier included in the wireless communication unit 10 according to the detection results of the voltage detection unit 71, the temperature detection unit 80, and the open / close detection unit 90. The transmission amplifier amplifies the transmission power of a radio signal transmitted toward the base station apparatus BS. The reception amplifier amplifies the radio signal received from the base station apparatus BS.

  Next, the operation of the mobile radio terminal apparatus having the above configuration will be described. In the following description, a gain control process for controlling the transmission amplifier and the reception amplifier of the wireless communication unit 10 according to the state of the mobile wireless terminal device including opening / closing of the housing will be particularly described. FIG. 3 is a flowchart showing transmission gain control, and FIG. 4 is a flowchart showing reception gain control. These processes are performed by a control program and control data stored in the storage unit 50 by the control unit 100, respectively. And is repeatedly executed while the power of the mobile radio terminal device is turned on.

  First, transmission gain control will be described with reference to FIG. 3. In step 3a, the control unit 100 determines whether or not the shape of the mobile radio terminal apparatus is in a closed state based on the detection result of the open / close detection unit 90. Determine. Here, when it is determined that the shape of the mobile radio terminal device is in a closed state, the process proceeds to step 3c. On the other hand, when the mobile radio terminal device is not in a closed state (a little open state), the process proceeds to step 3b. Transition.

  In step 3b, the control unit 100 determines whether or not an external device that can connect an external antenna such as a hands-free kit is connected to the external interface 60. If the external device is connected, the process proceeds to step 3c. On the other hand, if the external device is not connected, the process proceeds to step 3f.

  In step 3c, based on the detection result of the temperature detection unit 80, the control unit 100 generates a preset environmental change in the mobile radio terminal device, that is, the temperature detected by the temperature detection unit 80 sets a preset temperature threshold. It is determined whether it has been exceeded. When the temperature detected by the temperature detection unit 80 exceeds a preset temperature threshold value, the process proceeds to step 3f. On the other hand, when the temperature detected by the temperature detection unit 80 does not exceed the preset temperature threshold value. Goes to step 3d.

  In step 3d, based on the detection result of the voltage detection unit 71, the control unit 100 determines whether or not the power stored in the battery 70 is equal to or lower than a preset power threshold. If the power stored in the battery 70 is less than or equal to the preset power threshold value, the process proceeds to step 3f, while if the power stored in the battery 70 is not less than or equal to the preset power threshold value. The process proceeds to step 3e.

  In step 3e, the control unit 100 sets a preset normal gain Gt1 for the transmission amplifier of the wireless communication unit 10, and ends the processing.

  In step 3f, the control unit 100 sets a preset gain Gt2 (<Gt1) for the transmission amplifier of the wireless communication unit 10, and ends the process.

  Next, reception gain control will be described with reference to FIG. In step 4a, the control unit 100 determines whether or not the shape of the mobile radio terminal apparatus is in a closed state based on the detection result of the open / close detection unit 90. Here, if it is determined that the shape of the mobile radio terminal apparatus is in a closed state, the process proceeds to step 4b. On the other hand, if the mobile radio terminal apparatus is not in the closed state (opened even a little), the process proceeds to step 4f. Transition.

  In step 4b, the control unit 100 determines whether or not an external device that can connect an external antenna such as a hands-free kit is connected to the external interface 60. If the external device is connected, the process proceeds to step 4f. On the other hand, if the external device is not connected, the process proceeds to step 4c.

  In step 4c, based on the detection result of the temperature detection unit 80, the control unit 100 generates a preset environmental change in the mobile radio terminal device, that is, the temperature detected by the temperature detection unit 80 sets a preset temperature threshold. It is determined whether it has been exceeded. When the temperature detected by the temperature detection unit 80 exceeds a preset temperature threshold value, the process proceeds to step 4f. On the other hand, when the temperature detected by the temperature detection unit 80 does not exceed the preset temperature threshold value. Shifts to step 4d.

  In step 4d, based on the detection result of the voltage detection unit 71, the control unit 100 determines whether or not the power stored in the battery 70 is equal to or lower than a preset power threshold. If the power stored in the battery 70 is less than or equal to the preset power threshold, the process proceeds to step 4f. On the other hand, if the power stored in the battery 70 is not less than or equal to the preset power threshold. The process proceeds to step 4e.

  In step 4e, the control unit 100 sets Gr2 (> Gr1) higher than the normal gain Gr1 set in advance for the receiving amplifier of the wireless communication unit 10, and ends the process.

  In step 4f, the control unit 100 sets a preset normal gain Gr1 for the reception amplifier of the wireless communication unit 10, and ends the processing.

  As described above, in the mobile radio terminal device having the above-described configuration, the antenna characteristics are deteriorated in the closed state compared to the open state in comparison with the case in which the case is open. The transmission gain and the reception gain are increased.

  Therefore, according to the mobile radio terminal apparatus having the above configuration, even when the housing has a housing whose shape changes, it is possible to stabilize the change in antenna gain and maintain the desired communication quality.

  Also, in the mobile radio terminal device configured as described above, when the case is closed, the reception gain is higher than when the case is open (normal reception gain), while the case is open. In this case, the transmission gain is lowered as compared with the case where the casing is closed (normal transmission gain), so that the change in antenna gain accompanying the change in shape is stabilized.

  For this reason, when the case is opened, the transmission gain is lower than when the case is closed, so that the specified level can be prevented from being exceeded, and when the case is closed, the case is opened. Since the reception gain is higher than that in the state, it is possible to perform more reliable waiting for incoming calls. Further, as shown in FIG. 5, the transmission gain is controlled in a decreasing direction, so that it is possible to suppress a temperature rise when the casing is opened and to improve a SAR (Specific Absorption Rate).

  In the mobile radio terminal apparatus, when an external device to which an external antenna can be connected is connected to the external interface 60, a normal gain is set in the transmission amplifier even when the housing is open. Therefore, it is possible to transmit with a predetermined transmission power using an external antenna regardless of the open / closed state of the housing.

  Similarly, when an external device to which an external antenna can be connected is connected to the external interface 60, a normal gain is set for the reception amplifier even when the housing is closed. Regardless of the open / closed state of the body, it is possible to receive with the expected sensitivity without increasing the power consumption.

  In the mobile radio terminal device, the temperature detected by the temperature detection unit 80 exceeds the preset temperature threshold even when the casing is closed or the external device is connected to the external interface 60. In this case, since the gain lower than the normal gain is set in the transmission amplifier, transmission can be performed with the transmission power lowered regardless of the open / closed state of the casing or the connection of an external device.

  Similarly, even when the casing is in a closed state or when the external device is connected to the external interface 60, if the temperature detected by the temperature detection unit 80 exceeds a preset temperature threshold, reception is performed. Since the normal gain is set as the gain of the amplifier, it can be received with the normal gain regardless of the open / close state of the casing or the connection of an external device.

  Furthermore, in the mobile radio terminal device, the battery is detected based on the voltage of the battery 70 detected by the voltage detection unit 71 even when the casing is closed or the external device is connected to the external interface 60. When the power stored in 70 falls below a preset power threshold, the transmission amplifier is set to a gain that is lower than the normal gain. Regardless, the transmission power can be reduced for transmission.

  Similarly, even when the casing is in a closed state or when the external device is connected to the external interface 60, the electric power accumulated in the battery 70 is based on the voltage of the battery 70 detected by the voltage detection unit 71. When the power threshold is lower than the preset threshold, a normal gain is set for the receiving amplifier, so that it is possible to receive with a normal gain regardless of the open / close state of the housing or the connection of external devices. it can.

  FIG. 6 summarizes the control of the control unit 100. “Power supply voltage” is the state of the power supply voltage, “Temperature correction” is a user setting whether to perform temperature correction, “Open / close” is the open / close state of the housing, and “External ANT” is the connection of the external device Each state is shown, and the gain control of the transmission amplifier is performed according to the combination of these conditions, as shown in the column “Correction”.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. Further, for example, a configuration in which some components are deleted from all the components shown in the embodiment is also conceivable. Furthermore, you may combine suitably the component described in different embodiment.

  As an example, for example, in the above embodiment, a mobile phone has been described as an example of a mobile radio terminal device. However, the present invention is not limited to this, and the built-in antenna gain varies depending on the shape. The present invention can be applied to any electronic device. That is, the present invention can be applied to a notebook personal computer, a PDA (Personal Digital Assistance) equipped with a wireless LAN or Bluetooth (registered trademark), and other digital information home appliances.

  In the above embodiment, the case where the shape of the mobile wireless terminal device changes by opening and closing, such as a folding type and a sliding type, has been described as an example. However, the present invention is not limited to this, and the gain of the antenna changes. It can be applied to any mobile radio terminal device whose shape changes.

In addition, it goes without saying that the present invention can be similarly implemented even if various modifications are made without departing from the gist of the present invention.

  DESCRIPTION OF SYMBOLS 1 ... Built-in antenna, 10 ... Wireless communication part, 20 ... Display part, 30 ... Call part, 31 ... Speaker, 32 ... Microphone, 40 ... Operation part, 50 ... Memory | storage part, 60 ... External interface, 70 ... Battery, 71 ... Voltage detection unit, 80 ... temperature detection unit, 90 ... opening / closing detection unit, 100 ... control unit, BS ... base station apparatus, NW ... mobile communication network.

Claims (3)

In a mobile radio terminal apparatus having a housing that can be deformed at least into a first shape and a second shape having a relatively higher antenna gain than the first shape,
Transmitting means for amplifying and transmitting a radio signal with a set gain;
Shape detection means for detecting the shape of the housing;
Based on the detection result of the shape detection means, when the shape of the casing is the first shape, a preset first gain is set in the transmission means, while the shape of the casing is In the case of the second shape, transmission gain control means for setting a second gain lower than the first gain in the transmission means;
Temperature detecting means for detecting temperature, and
Even if the shape of the casing is the first shape, the transmission gain control means is configured to increase the second gain when the temperature detection means detects a temperature equal to or higher than a preset threshold value. A mobile radio terminal set as a transmission means. In a mobile radio terminal apparatus having a housing that can be deformed at least into a first shape and a second shape having a relatively higher antenna gain than the first shape,
Transmitting means for amplifying and transmitting a radio signal with a set gain;
Shape detection means for detecting the shape of the housing;
Based on the detection result of the shape detection means, when the shape of the casing is the first shape, a preset first gain is set in the transmission means, while the shape of the casing is In the case of the second shape, transmission gain control means for setting a second gain lower than the first gain in the transmission means;
Voltage detecting means for detecting the voltage of the battery,
Even if the shape of the casing is the first shape, the transmission gain control means is configured to increase the second gain when the voltage detection means detects a voltage equal to or lower than a preset threshold value. A mobile radio terminal set as a transmission means. Receiving means for amplifying and receiving a radio signal with a set gain;
Based on the detection result of the shape detecting means, when the shape of the casing is the second shape, a preset third gain is set in the receiving means, while the shape of the casing is 3. The mobile radio terminal apparatus according to claim 1, further comprising: a reception gain control unit that sets a fourth gain higher than the third gain in the reception unit in the case of the first shape.

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