JP2008301009A - Electronic equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To avoid restriction related to design by identifying an opposite party device, such as a cradle device, without requiring any switches, or the like, and to reduce the number of components. <P>SOLUTION: Electronic equipment (cellular phone 2) is connected to the opposite party device (cradle device 3), having a first signal line (signal line B) and a power supply section Vb connected to the first signal line electrically. The electronic equipment has a second signal lien (signal line A) connected to the first one electrically when the electronic equipment is attached to the opposite party device, and a control section 31 that monitors a change in the potential of the second signal line and has data indicating the relationship to the change in the potential of the second signal line for each opposite party device. The control section refers to data based on the change in the potential of the second signal line occurring when the second signal line is connected to the first one electrically, and identifies the opposite party device to which the electronic equipment is attached. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an electronic device such as a mobile phone that can be attached to a plurality of counterpart devices and can execute a function installed in each counterpart device.

  A mobile phone has a built-in battery pack to obtain power necessary for transmission / reception of radio waves and the like, and needs to be charged periodically by, for example, a cradle device which is an external connection device (hereinafter referred to as a partner device).

  The cradle device usually has a desktop holder in which a mobile phone can be placed or mounted on the top surface, and a circuit board disposed in the desktop holder and the desktop holder in the storage space. The protruding charging terminal of the mobile phone, the connector attached to the circuit board by solder etc. so that the connection plug for power supply is connected, and the power supply terminal of the desktop holder are opposite to the power supply terminal and protrude into the accommodation space And a latch that engages with the engaging groove of the mobile phone.

  In addition, recently, the cradle device is not only used for charging, but also has a built-in woofer with a speaker amplifier, so that music can be played with powerful sound quality and volume when the mobile phone is attached to the cradle device. Usage forms such as viewing have appeared.

There have also been many applications related to this type of usage. For example, in order to use a mobile phone and a cradle device having a charging terminal and an external connection terminal as an integrated station, the cradle device is set to a predetermined operation mode. A cradle-equipped mobile device that sets and operates a functional circuit built in the cradle device is known (see, for example, Patent Document 1).
JP 2003-75907 A

  By the way, according to the above-described usage, the mobile phone is often mounted only on a dedicated cradle, and a mechanical mechanism is provided so that the mobile phone cannot be mounted even if it is mounted on another type of cradle. Also, if the mobile phone can be mounted on multiple types of cradle, it may be possible to identify the type of cradle by providing a switch on the mobile phone or cradle, but in this case, the number of parts increases, and This is not preferable because of design restrictions.

  It is an object of the present invention to provide an electronic device that can avoid design restrictions by identifying a counterpart device such as a cradle without requiring a switch or the like and can reduce the number of parts.

  In order to solve the above-described problem, an electronic apparatus according to a first aspect of the present invention includes a first signal line and a counterpart device that includes a power supply unit electrically connected to the first signal line. A second signal line that is electrically connected to the first signal line when the electronic apparatus is attached to the counterpart device; and a second signal line And monitoring a potential change, and for each of the counterpart devices, a control unit having data indicating a potential change of the second signal line when attached to the counterpart device, the control unit, A counterpart apparatus in which the electronic device is mounted with reference to the data based on a potential change of the second signal line generated when the second signal line is electrically connected to the first signal line Identify

  In addition, an electronic device according to a second aspect of the present invention includes a counterpart that includes a charger that performs charging, a first signal line, and a power supply unit that is electrically connected to the first signal line. A second signal line that is electrically connected to the first signal line when the electronic device is attached to the counterpart device; and the second signal line. And a control unit including data indicating a potential change of the second signal line when the device is attached to the counterpart device, and the control unit includes: When the charging start interruption by the charger is detected, monitoring of the potential change of the second signal line is started and the second signal line is electrically connected to the first signal line The electric power is referred to by referring to the data based on the potential change of the second signal line that sometimes occurs. Identifying a partner apparatus which device is attached.

  In the electronic apparatus according to the first and second aspects of the present invention, there are at least two types of the counterpart devices.

  In the electronic apparatus according to the first and second aspects of the present invention, the counterpart device includes at least one of a charging cradle, a cradle with a speaker amplifier, and a cradle with a woofer.

  According to the electronic apparatus of the present invention, the counterpart device such as a cradle can be identified without requiring a switch or the like, so that design restrictions can be avoided and the number of parts can be reduced.

FIG. 1 shows an electronic device unit (here, a mobile phone unit 1) including an electronic device (here, a mobile phone 2) according to an embodiment of the present invention and a counterpart device (here, a cradle device 3). It is a top view including a perspective view in a part.
1A shows the cradle device, FIG. 1B shows the mobile phone 2 in the closed state, and FIG. 1C shows the mobile phone 2 in the open state.

  2 is a plan view partially including a perspective view showing a state in which the mobile phone 2 is placed on the cradle device 3. FIG. 2 (a) shows a state in which the mobile phone 2 is closed, as shown in FIG. b) shows the respective cases when the mobile phone 2 is opened.

  3 is a side view partially including a perspective view showing a state in which the mobile phone 2 is placed on the cradle device 3. FIG. 3A shows a state in which the mobile phone 2 is closed, as shown in FIG. b) shows the respective cases when the mobile phone 2 is opened.

  The mobile phone 2 is configured as a so-called foldable mobile phone, and includes a receiving housing 5 and a transmitting housing 6. Note that the combination of the receiving case 5 and the transmitting case 6 is an example of a portable case.

  The receiving case 5 and the sending case 6 are connected to each other by a connecting part 7, and the mobile phone 2 can be opened and closed with the connecting part 7 as a center of rotation. The receiving case 5 and the transmitting case 6 are each formed in a generally thin rectangular parallelepiped shape, and are superposed on each other in the closed state, and the outlines of the receiving case 5 and the sending case 6 substantially coincide with each other when viewed from the other case side. It is like that.

  The receiving case 5 is formed in a substantially thin rectangular parallelepiped shape by resin, for example. The receiving housing 5 is provided with a display unit 9 for displaying various information as images, a speaker 39 for calling, and a magnet 41 as a detection target of an opening / closing detection sensor 42 described later.

  The display unit 9 is configured by, for example, a liquid crystal display, and can display an image on the facing surface of the receiving housing 5 that faces the transmitting housing 6 in the closed state. A sub display unit that displays an image may also be provided on the back side of the receiving housing 5.

The speaker for call 39 is provided at the center of the end portion 5 e on the opposite side of the connection portion 7 of the receiving housing 5. The speaker 39 is composed of, for example, a dynamic speaker. That is, the speaker 39 has a coil to which an acoustic signal (electrical signal) is input, a magnet inserted through the coil, and a diaphragm fixed to the coil or the magnet.
In addition, the speaker 39 may convert a sound signal into sound using magnetism, or may not use magnetism such as a capacitor speaker. In addition, the speaker 39 may be other than a dynamic speaker such as a ribbon speaker when the sound signal is converted into sound using magnetism.

  The sound output from the speaker 39 is output from the sound output hole 10. The sound emitting hole 10 is provided in the center of the end portion 5e on the opposite side of the connection portion 7 of the receiving housing 5 corresponding to the position of the speaker 39, and is opened on the facing surface of the receiving housing 5. .

  The transmitter case 6 is formed in a substantially thin rectangular parallelepiped shape, for example, with resin. The transmitter case 6 includes an operation unit 12 that receives user operations, a main antenna 13 and a sub-antenna 14 that transmit and receive radio waves, a speaker 15 that outputs a notification sound, a call microphone 35, and an open / close detection sensor 42. Is provided.

The main antenna 13 is built in the end portion 6e on the opposite side of the connection portion 7 of the transmitting housing 6. The sub-antenna 14 is built in the transmitter case 6 on the side surface side of the transmitter case 6 and between the center of the transmitter case 6 and the main antenna 13.
The main antenna 13 and the sub antenna 14 are configured as diversity antennas. For example, the main antenna 13 is used for transmission / reception, mail transmission / reception, etc., and is always used. The sub-antenna 14 is used together with the main antenna 13 when data communication other than during a voice call is performed, such as when downloading music.

The notification speaker 15 is provided at the end of the transmitter housing 6 on the side of the connecting portion 7, and two speakers 15 are provided on the side of the transmitter housing 6. The speaker 15 is composed of, for example, a dynamic speaker. That is, the speaker 15 has a coil to which an acoustic signal (electrical signal) is input, a magnet inserted through the coil, and a diaphragm fixed to the coil or the magnet.
In addition, the speaker 15 may convert a sound signal into sound using magnetism, or may not use magnetism such as a capacitor speaker. In addition, the speaker 15 may be other than a dynamic speaker such as a ribbon speaker when the sound signal is converted into sound using magnetism.

  The sound output from the speaker 15 is output from the sound emission hole 17. Two sound emitting holes 17 are provided on the side of the end of the transmitting housing 6 on the side of the connecting portion 7 corresponding to the position of the speaker 15, and are opposite to the surface facing the receiving housing 5. (The surface facing the cradle device 3). The sound emitting hole 17 may be opened on the side surface of the transmitting housing 6.

The talking microphone 35 is provided at the center of the end 6 e opposite to the connecting portion 7 of the transmitting housing 6. The microphone 35 is configured by, for example, a dynamic microphone. That is, the microphone 35 includes a coil that outputs an acoustic signal, a magnet that is inserted into the coil, and a diaphragm that is fixed to the coil or the magnet.
Note that the microphone 35 may convert sound into an acoustic signal using magnetism, or may not use magnetism such as a condenser microphone. Further, the microphone 35 may be other than a dynamic microphone such as a ribbon microphone when the sound is converted into an acoustic signal using magnetism.

  Sound is input to the microphone 35 through the sound collection hole 16. The sound collection hole 16 is provided in the center of the end portion 6e on the opposite side of the connection portion 7 in the transmission case 6 corresponding to the position of the microphone 35, and on the opposite surface facing the reception case 5. It is open.

The open / close detection sensor 42 is a magnetic sensor. For example, the open / close detection sensor 42 includes a Hall IC and a magnetoresistive element, and outputs a signal having a potential corresponding to the strength of the detected magnetic field in a predetermined direction.
The open / close detection sensor 42 is located near the center in the longitudinal direction (near the center between the connecting portion 7 and the end portion 6e opposite to the connecting portion 7) in the transmitter case 6, and on the side side. Is provided.

The magnet 41 described above is provided at a position in the receiving housing 5 that faces the open / close detection sensor 42 when the receiving housing 5 is closed.
Therefore, when the mobile phone 2 is closed, the magnet 41 and the open / close detection sensor 42 are close to each other, and the magnetic field at the position where the open / close detection sensor 42 is placed becomes strong. When the mobile phone 2 is closed, the magnet 41 and The magnetic field at the position where the opening / closing detection sensor 42 is arranged is weakened away from the opening / closing detection sensor 42. Therefore, open / close detection (closed state detection) can be performed depending on whether or not the strength of the magnetic field detected by the open / close detection sensor 42 is greater than a predetermined threshold.
The open / close detection sensor 42 may be configured to output an on signal or an off signal depending on whether or not the detected magnetic field strength is greater than a predetermined threshold.

  On the other hand, the cradle device 3 as a counterpart device includes a housing 18, a cord 19 for supplying power to the cradle device 3, a charging terminal 20 for electrically connecting the cradle device 3 and the mobile phone 2, 21 is provided.

  The housing 18 includes, for example, a lower cover 18a that is placed on a desk or the like, and an upper cover 18b that covers the lower cover 18a. The lower cover 18a and the upper cover 18b are formed, for example, by tanning. The upper cover 18b is placed on the lower cover 18a so as to be inclined with respect to the surface on which the housing 18 is placed, and the housing 18 is inclined with respect to the surface on which the housing 18 is placed (desk surface or the like). It is formed in the trapezoid shape which has the inclined surface 18c.

On the upper surface of the housing 18, a recess (mounting portion) 25 for mounting the mobile phone 2 is formed. The recess 25 is provided on the lower side of the inclined surface 18c.
The recess 25 has a shape in which the transmitter case 6 of the mobile phone 2 is fitted (not shown), but a hook portion is formed at both ends of the recess 25 and is formed on the connecting portion 7 side and the microphone 35 side of the transmitter case 6. The cradle device 3 is placed on a placing surface (bottom part of the recessed portion 25) 18d on which the rear surface 6a of the transmission housing 6 abuts. It is formed so as to be inclined with respect to the surface (desk surface or the like).
The cellular phone 2 is placed on the cradle device 3 when the transmitter case 6 is fitted and inserted into the recess 25 with the connecting portion 7 side facing upward on the inclined surface 18c.

  The back surface 6a of the transmission case 6 is an example of a predetermined surface of the mobile case. The positional relationship between the transmitting housing 6 and the housing 18 of the cradle device 3 when the transmitting housing 6 is fitted and inserted into the recess 25 of the cradle device 3 is an example of a predetermined positional relationship.

As shown in FIGS. 3A and 3B, the depth of the recess 25 is substantially equal to or less than the thickness of the transmitter case 6. Therefore, even if the receiving housing 5 is moved in the opening / closing direction with the transmitting housing 6 fitted in the recessed portion 25, the periphery of the recessed portion 25 of the inclined surface 18 c does not contact the receiving housing 5. That is, the mobile phone 2 can be opened and closed with the cradle device 3 placed.
Therefore, the mobile phone 2 can be in an open state or a closed state depending on the use state while being placed on the cradle device 3. For example, when displaying an image on the display unit 9 such as movie playback, it can be in an open state, and when only charging or music playback is performed, it can be in a closed state.

  The cord 19 extends from the housing 18, and a power plug (not shown) is provided at the tip thereof. When the power plug is inserted into a power receptacle for supplying power at a commercial frequency, power is supplied to the cradle device 3 via the cord 19.

  The charging terminals 20, 21 are provided so as to protrude from the bottom of the recess 25. When the mobile phone 2 is fitted and inserted into the recess 25, the charging terminals 20, 21 are on the surface facing the recess 25 of the transmitting housing 6 of the mobile phone 2. The charging terminal 37 (see FIG. 4) provided is contacted and connected.

  FIG. 4 is a block diagram showing a configuration of a signal processing system of the mobile phone unit 1 including the mobile phone 2 and the cradle device 3.

  The mobile phone 2 includes a control unit 31, a communication processing unit 32, an acoustic processing unit 33, an image processing unit 45, a charging circuit 34, and a battery pack 38. The sound processing unit 33 is an example of a sound output unit. In addition to this, the mobile phone 2 receives and processes GPS signals transmitted from a plurality of GPS (global positioning system) satellites, determines the geographical position of the current location, and displays map data around the current location on the display. Although it has a GPS processing unit etc., illustration is omitted.

The control unit 31 is configured by an IC chip including, for example, a CPU, a ROM, a RAM, and the like. The CPU executes a program recorded in the ROM, and controls operations of the communication processing unit 32, the acoustic processing unit 33, the image processing unit 45, and the like based on signals from the operation unit 12, the open / close detection sensor 42, and the like.
For example, when a signal having a potential corresponding to the strength of the magnetic field detected from the open / close detection sensor 42 is input to the control unit 31, the detected magnetic field strength is less than a predetermined threshold based on the signal. It is determined whether or not it is large, and when it is large, it is determined that it is in a closed state, and when it is not, it is determined that it is in an open state.
For example, the control unit 31 stops displaying information on the display unit 9 when it is determined to be in a closed state, and displays information on the display unit 9 when it is determined to be in an open state. Processing corresponding to the open / closed state is executed, such as controlling the operation of the image processing unit 45.

  The control unit 31 also identifies the cradle device 3 attached with reference to the data stored in the threshold table 70 based on the potential change of the signal line A that occurs when the mobile phone 2 is attached to the cradle device 3. It has the function to do. Details will be described later.

The communication processing unit 32 includes a high frequency circuit, and performs wireless communication using radio waves. Specifically, the communication processing unit 32 modulates various data such as acoustic data and image data processed by the control unit 31 and transmits the data via the main antenna 13.
In addition, the communication processing unit 32 demodulates a signal received via the main antenna 13 and the sub antenna 14 and outputs the demodulated signal to the control unit 31 and the like.

The acoustic processing unit 33 outputs the acoustic signal from the microphone 35 to the control unit 31. The acoustic signal output to the control unit 31 is transmitted via the communication processing unit 32.
The sound processing unit 33 also mixes and amplifies the sound signal of the call voice received by the communication processing unit 32 and output from the control unit 31, the sound signal based on the music data stored in the external storage device, and the like. Then, the data is output to the speaker 39 for calling and the speaker 15 used for notification or the like.

  The image processing unit 45 converts the video data from the control unit 31 into a video signal and outputs it to the display unit 9. For example, the control unit 31 downloads the map data of the current location specified based on the GPS signal from the server and, for example, the current orientation (azimuth) of the mobile phone 2 specified based on the detection result of the geomagnetic sensor or the like. The map data is exchanged in accordance with the map data, and the map data after the coordinate exchange is output to the image processing unit 45 for display. However, the image processing unit 45 may share work such as coordinate conversion.

  The charging circuit 34 converts the electric power supplied to the charging terminal 37 into electric power having an appropriate voltage and supplies the electric power to a battery pack 38 as a power source of the mobile phone 2. Further, charging (power supply) to the battery pack 38 is started or charging is interrupted according to the charging state of the battery pack 38 or the like.

On the other hand, in addition to the charger (AC converter) 54, the cradle device 3 is connected to the controlled unit 50 that controls the execution of the function added to the cradle device 3 and the power supply unit Vb via the pull-up resistor Rb. Signal line B.
Here, the controlled unit 50 refers to a functional circuit controlled by the mobile phone 2 such as an audio amplifier, an LED (Light Emitted Diode), and a woofer.
The charger 54 converts the commercial frequency alternating current supplied via the cord 19 (FIGS. 1 and 2) into a direct current having an appropriate voltage and outputs the direct current to the charging terminals 20 and 21.

Hereinafter, a detailed description will be given of a connection portion between the mobile phone 2 and the cradle device 3.
As shown in FIG. 4, a signal line A (second signal line) is provided on the mobile phone 2 side, and the signal line A is a port (A / D: Analog / Digital Converter) (not shown). It is assumed that it is connected to the control unit 31 and the contact A via. The signal line A has a resistor Ra connected to the pair GND. Here, a voltage applied to the resistor Ra is Va.
On the other hand, the cradle device 3 has the power supply unit Vb as described above, and the power supply unit Vb is pulled up by the resistor Rb and is controlled by the controlled unit 50 via the signal line B (first signal line). And contact B.
Here, it is assumed that the signal line A and the signal line B are short-circuited (the contact A and the contact B are connected) by attaching the mobile phone 2 to the cradle device 3.

When the mobile phone 2 is not attached to the cradle device 3, the resistor Ra is connected to the pair GND of the signal line A, so that the voltage Va on the signal line A is applied. Here, since the voltage Va is at the GND level, it is assumed to be 0 [v]. At this time, the control unit 31 determines that the mobile phone 2 is not attached to the cradle device 3.
On the other hand, when the mobile phone 2 is attached to the cradle device 3 and the contact A and the contact B are short-circuited, the voltage of the signal line A (assumed to be Vab) is determined by the resistance ratio of the resistors Ra and Rb, and Vab = {Ra / (Ra + Rb)} * Vb. At this time, the voltage Vab is applied to the signal line A, and the control unit 31 is determined to be attached to the cradle device 3.

  That is, the control unit 31 determines that the mobile phone 2 is connected to the cradle device 3 when the voltage Va of the signal line A is Vab [v], and is not connected to the cradle device 3 when the voltage Va is 0 [v]. .

By the way, the signal line A when the mobile phone 2 is attached to each cradle device 3 (contact A and contact B are short-circuited) by changing the pull-up resistor Rb for each cradle device 3 to which the mobile phone 2 is attached. The voltage applied to is changed.
The controller 31 can determine which cradle device 3 is connected by determining this voltage change.
That is, it can be determined whether the mobile phone 2 is connected to, for example, a charging cradle device, a cradle device with a speaker amplifier, or a cradle device with a woofer.
For example, the signal line A and the signal line B are connected to the power supply unit Vb on the cradle device 3 side in a state where the pull-up resistor Rb1 is connected instead of the pull-up resistor Rb shown in FIG. Is short-circuited), the voltage applied to the signal line A (assuming Vab1) is determined by the resistance ratio of the resistors Ra and Rb1, and therefore, Vab1 = {Ra / (Ra + Rb1)} * Vb.

In this case, the control unit 31 detects the voltage value by setting the resistor Rb1 so that a voltage difference is generated between the voltage Vab and the voltage Vab1 when the pull-up resistor Rb is connected. It can be determined to which cradle device 3 the mobile phone 2 is attached.
For example, if the voltage is Vab or higher, the cradle device # 1 (3), if the voltage is Vab to Vab1, cradle device # 2 (3), if the voltage is lower than Vab1, the mobile phone 2 to which cradle device 3 Will not be installed.
For this reason, the control unit 31 assigns a threshold table 70 to the built-in memory, and the type of the cradle device 3 set for each voltage threshold (Vab to Vab1) according to the A / D resolution is assigned to the threshold table 70. The data regarding is stored.
That is, the control unit 31 includes data relating to the voltage threshold value indicating the relationship with the potential change for each cradle device 3.
The cradle device 3 may be three or more types. In this case, each cradle has a different resistance (corresponding to the pull-up resistor Rb shown in FIG. 4).

FIG. 5 is a flowchart showing the operation of the control unit 31 when the mobile phone 2 is mounted on the cradle device 3.
Hereinafter, the operation of the electronic apparatus according to the embodiment of the present invention will be described in detail with reference to the flowchart of FIG.

First, it is assumed that the mobile phone 2 is attached to the cradle device 3 (step S51 “Yes”), and thereby the signal line A on the mobile phone 2 side and the signal line B on the cradle device 3 side are in contact with each other. , A and B are short-circuited.
Since the voltage (Vab) applied to the signal lines A and B at that time is determined by the resistance ratio between Ra and Rb, Vab = {Ra / (Ra + Rb)} * Vb [V].
At this time, on the mobile phone 2 side, the control unit 31 detects the voltage of the signal line A via a port (A / D) (not shown) (step S53).
Here, since it is understood that the voltage applied to the signal line A has changed from Va [V] to Vab [V] (step S53 “Yes”), the control unit 31 attaches the mobile phone 2 to the cradle device 3. Can be determined. Further, by referring to the threshold value table 70 (step S54), it is determined to which cradle device 3 the mobile phone 2 is mounted (cradle type) (step S55).

  When the mobile phone 2 is attached to the cradle device 3 having a charging function, an interruption as to whether or not to perform charging occurs (step S52 “Yes”). After this interruption occurs, the signal line A A voltage change may be detected (step S53), and the type of the attached cradle device 3 may be determined. In this case, since it is not necessary to constantly monitor the voltage change of the signal line A, the load on the control unit 31 and the power consumption can be reduced.

  As described above, according to the electronic device according to the embodiment of the present invention, when there are several types of counterpart devices (cradle device 3), the ratio of the resistances Ra and Rb at the connection portion between the electronic device and the counterpart device. The voltage Vab applied to the signal line A changes, and the control unit 31 monitors the voltage and compares it with a threshold value. Whether the device is installed or not installed can be determined. Accordingly, it is possible to identify a counterpart device such as the cradle device 3 without the need for a switch or the like, so that it is possible to avoid design restrictions and to provide an electronic device with a reduced number of parts. it can.

  In addition, when an electronic device (mobile phone 2) is attached to a counterpart device (cradle device 3) having a charging function, an interruption as to whether or not to perform charging occurs. By determining the type of the counterpart device, the control unit 31 does not need to constantly monitor the signal line A, so that the load can be reduced and the current consumption can be suppressed.

  In addition, according to the above-described electronic device according to the embodiment of the present invention, only the mobile phone 2 is exemplified as the electronic device. However, the electronic device is not limited to the mobile phone 2 and is not limited to a PDA (Personal Digital Assistants), a game machine, a PC, or the like. Can be applied similarly. Moreover, although only the cradle device 3 is illustrated as the counterpart device, the present invention can be similarly applied to an expansion device or the like prepared in the sense of expanding the function of the mounted electronic device.

FIG. 2 is a plan view partially including a perspective view showing an electronic device unit including an electronic device according to an embodiment of the present invention and a counterpart device. FIG. 6 is a plan view partially including a perspective view showing a state in which the electronic apparatus is mounted on the counterpart device 3. It is a side view including a perspective view in part showing a state where the electronic device is attached to the counterpart device. It is a block diagram which shows the structure of the signal processing system of the electronic device unit which consists of the electronic device concerning embodiment of this invention, and the other party apparatus. It is a flowchart which shows operation | movement of the electronic device (control part) which concerns on embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Mobile phone unit, 2 ... Mobile phone (electronic device), 3 ... Cradle apparatus (partner apparatus), 31 ... Control part, 50 ... Controlled part, 54 ... Charger, 70 ... Threshold table.

Claims (4)

An electronic device attached to a counterpart device including a first signal line and a power supply unit electrically connected to the first signal line,
A second signal line electrically connected to the first signal line when the electronic device is attached to the counterpart device;
A control unit that monitors a potential change of the second signal line and includes data indicating a potential change of the second signal line when the counterpart device is attached to the counterpart device. And
The controller is
A counterpart apparatus in which the electronic device is mounted with reference to the data based on a potential change of the second signal line generated when the second signal line is electrically connected to the first signal line An electronic device characterized by identifying An electronic device attached to a counterpart device comprising a charger for charging, a first signal line, and a power supply unit electrically connected to the first signal line,
A second signal line electrically connected to the first signal line when the electronic device is attached to the counterpart device;
A controller that monitors potential changes in the second signal line and includes data indicating potential changes in the second signal line when the counterpart device is attached to the counterpart device. ,
The controller is
When the charging start interruption by the charger is detected, monitoring of the potential change of the second signal line is started and the second signal line is electrically connected to the first signal line An electronic apparatus characterized by identifying a counterpart apparatus on which the electronic apparatus is mounted with reference to the data based on a potential change of the second signal line that occurs sometimes. The counterpart device is
The electronic device according to claim 1, wherein there are at least two types. The counterpart device is
The electronic apparatus according to claim 1, comprising at least one of a charging cradle, a cradle with a speaker amplifier, and a cradle with a woofer.

Images