JP2003289363A - Portable telephone set and method for controlling the portable telephone set - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To adjust the facing direction of the display picture of a sub display part toward a user so as to be easily seen when the folding portable telephone set having the sub display part outside is mounted on a charging cradle. <P>SOLUTION: When a battery 90 discharges, the portable telephone set 40 is mounted on the cradle 80 of a charging device to be charged. At that time, a magnetic sensor 67 generates a magnetic detection signal M by the magnetic field of a magnet 81 built in the cradle 80 of the charging device such that the portable telephone set is detected in a state of being mounted on the cradle. The magnetic detection signal M is transmitted to a mounting detecting part 72, and the mounting detecting part 72 generates a mounting detection signal N. When the mounting detection signal N is generated, the display picture of the sub display part 53 is displayed in a reverse direction. In such a case, the display picture becomes upside down by making the scanning sequence of each scanning line of the sub display part 53 reverse to that of a normal case, and the display picture becomes horizontally reverse by making data to be supplied to each data line of the sub display part 53 horizontally reverse. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile phone and a method for controlling the mobile phone, and more particularly, the housing has a foldable structure, and a display such as an analog watch is displayed on the outer surface of the housing when folded. The present invention relates to a mobile phone having a sub-display unit and a control method for the mobile phone.

[0002]

2. Description of the Related Art Some mobile phones having a foldable structure have a sub-display unit for displaying an analog clock or the like on the outer surface when folded.
When the battery for the power supply is discharged, the battery is mounted and placed on a stand of a dedicated charging device to be charged.

This type of mobile phone is conventionally composed of an upper unit 11 and a lower unit 12, as shown in FIG. 12, for example. The lower unit 12 has a hinge portion 13 with respect to the upper unit 11. Are connected through. The upper unit 11 is provided with an antenna 14 and a vertically long sub-display portion 15. The sub display unit 15 is, for example, an analog clock,
Display a directional screen.

As shown in FIG. 13, the upper unit 11 has a main display portion 1 on the front side which contacts the lower unit 12 when folded so as to contact the lower unit 12.
6 is provided. The lower unit 12 is provided with an operation unit 17 including a plurality of button switches and the like on the front surface that contacts the upper unit 11 when folded so as to contact the upper unit 11, and is used only when the battery for power supply is discharged. It is mounted and placed on the stand 20 of the charging device for charging. The table 20 of the charging device supplies the power supply voltage supplied from the AC adapter 30 to a charging power supply input terminal (not shown) of the lower unit 12.

[0005]

However, the above-mentioned conventional mobile phone has the following problems. That is, when the AC adapter 30 is inserted into an AC outlet on the wall surface and the mobile phone is mounted and placed on the table 20 of the charging device in a folded state to be charged, the table 20 of the charging device is placed on the table. Often. At this time, in the mobile phone in which the antenna 14 is provided in the upper unit 11, the display screen in the sub display unit 15 is displayed upside down on the side of the user as shown in FIG. 14, which makes it difficult to see. There was a problem.

The present invention has been made in view of the above circumstances, and a portable telephone and a portable telephone in which the display screen of the sub-display portion is easy for the user to see even when the battery is mounted on the stand of the charging device for charging. It is intended to provide a control method for a telephone.

[0007]

In order to solve the above-mentioned problems, the invention according to claim 1 comprises a first unit having a main display section on a first front surface and a sub-display section on a back surface,
A second unit provided with a button operation unit on a second front surface, wherein the first unit and the second unit are folded via a hinge unit in a mode in which the first and second front surfaces face each other. And a sub-display unit based on the mounting confirmation signal, which outputs a mounting confirmation signal when the telephone is mounted on a stand of a charging device. And a display direction changing means for changing the display direction of the screen displayed on the screen from the screen when the mobile phone is being charged to the screen when the battery is being charged.

According to a second aspect of the present invention, there is provided a first unit provided with an antenna and having a main display section on a first front surface and a sub display section on a rear surface, and a button operation section on a second front surface. A second unit having the second unit, wherein the first unit and the second unit are configured to be folded via a hinge portion in such a manner that the first and second front faces face each other. In this case, the mobile phone carries a mounting confirmation means for outputting a mounting confirmation signal when the telephone is mounted on the stand of the charging device, and a display direction of the screen displayed on the sub-display unit based on the mounting confirmation signal. It is characterized in that it is provided with display direction changing means for displaying the image by changing the screen upside down or horizontally.

A third aspect of the present invention relates to the mobile phone according to the first or second aspect, wherein the mounting confirmation means mounts the charging device when the own phone is mounted on the mounting base of the charging device. It is characterized by comprising a voltage sensor that outputs a voltage detection signal based on the voltage supplied from the device, and a mounting detection unit that outputs a mounting detection signal based on the voltage detection signal.

A fourth aspect of the present invention relates to the mobile phone according to the first, second or third aspect, wherein the mounting confirmation means is configured to arbitrarily cancel the generation of the mounting detection signal. It has a feature.

The invention according to claim 5 is the invention as defined in claims 1, 2, and 3.
Alternatively, the sub-display unit is configured to display a screen of an analog timepiece.

The invention according to claim 6 is the invention according to claims 1, 2, and 3.
Alternatively, the sub-display unit is configured to display a screen of a digital timepiece.

According to a seventh aspect of the present invention, there is provided a method for controlling a mobile phone, comprising a first unit having a main display section on a first front surface and a sub display section on a rear surface, and a button operation on a second front surface. A second unit having a portion, the first unit
And a mobile phone configured such that the first unit and the second unit are folded via a hinge portion in a state where the second front surfaces face each other, and the mobile phone is mounted and mounted on a stand of a charging device. And a display change for changing the display direction of the screen displayed on the sub-display from the screen on the mobile phone to the screen on the charge based on the installation confirmation signal. It is characterized by performing processing.

The present invention according to claim 8 relates to a method for controlling a mobile phone, comprising: a first unit having an antenna, a first front surface having a main display portion and a rear surface having a sub display portion; A second unit having a button operation unit on the front surface of the second unit, and the first unit and the second unit are folded via a hinge unit in a mode in which the first and second front surfaces face each other. In the mobile phone configured as described above, a mounting confirmation process of outputting a mounting confirmation signal when the telephone is mounted on the stand of the charging device,
It is characterized in that display change processing is performed to change the display direction of the screen displayed on the sub-display unit to be upside down or sideways with respect to the screen when being carried based on the mounting confirmation signal.

The invention according to claim 9 relates to the control method according to claim 7 or 8, wherein in the mounting confirmation processing, when the own telephone is mounted on the mounting base of the charging device, the mounting base of the charging device is installed. It is characterized in that a voltage detection process for outputting a voltage detection signal based on a voltage supplied from the device and a mounting detection process for outputting a mounting detection signal based on the voltage detection signal are performed.

The invention according to claim 10 relates to the control method according to claim 7, 8 or 9, characterized in that the generation of the mounting detection signal is arbitrarily canceled in the mounting confirmation processing.

The invention described in claim 11 is,
According to the control method described in 9 or 10, the display screen of the sub display unit is a screen of an analog clock.

The invention described in claim 12 is,
The control method according to 9 or 10 is characterized in that the display screen of the sub display unit is a screen of a digital timepiece.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 (a), (b)
[Fig. 3] is an external view showing a closed state of the folding type mobile phone according to the first embodiment of the present invention. Fig. 1 (a) is a front view and Fig. 1 (b) is a side view. As shown in FIG. 2B, the mobile phone 40 of this form has the upper unit 5
0 and a lower unit 60, and the lower unit 60 is connected to the upper unit 50 via a hinge portion 51. Then, in the upper unit 50,
An antenna 52 is provided, and a vertically long sub-display portion 53 is provided as shown in FIG. The sub display unit 53 displays a screen such as an analog clock.

FIG. 2 is a diagram showing a state where the mobile phone 40 of FIG. 1 is mounted and placed on the stand 80 of the charging device in the open state. As shown in FIG. 2, the upper unit 50 is in contact with the lower unit 60 when folded so as to contact the lower unit 60.
Is provided. When the lower unit 60 is folded so as to contact the upper unit 50, the upper unit 5
An operation unit 61 composed of a plurality of button switches and a transmitter unit (microphone) 62 are provided on the front surface in contact with 0, and when the battery for power supply is discharged, the operation unit 61 is mounted and placed on a stand 80 of a dedicated charging device. Will be charged. The table 80 of the charging device supplies the power supply voltage supplied from the AC adapter 30 to a charging power supply input terminal (not shown) of the lower unit 60. In addition, the table 80 of the charging device incorporates a magnet 81 (not shown) for causing the mobile phone 40 to detect the state of being mounted on the table 80 of the charging device.

FIG. 3 is a block diagram showing the internal electrical configuration of the upper unit 50 and the lower unit 60 in FIG. As shown in FIG. 3, the upper unit 50 accommodates an antenna 52, a sub display section 53, a main display section 54, and a receiving section 55. The antenna 52 transmits and receives radio waves to and from a radio base station (not shown). Sub display unit 53
Is composed of, for example, an LCD (Liquid Crystal Display). The main display unit 54 is composed of, for example, an LCD, and displays various information such as the telephone number information and icon information of the other party. The receiver 55 generates a voice of the transmission partner and transmits it to the user.

The lower unit 60 includes an operation section 61, a microphone 62, an RF circuit 63, and a modulation / demodulation circuit 64.
A baseband processing circuit 65 and a codec circuit 66
A magnetic sensor 67, a clock unit 68, a storage unit 69,
A control unit 70 and a battery 90 are housed. Operation part 6
Reference numeral 1 includes a send button, an alphabet / kana / kanji / numeric conversion button, a power on / off button, a cross button for cursor operation, an end button, and the like. The microphone 62 receives the voice of the user and transmits the voice. The RF circuit 63 has a receiver circuit, a transmitter circuit, and a frequency synthesizer (not shown).

The modulation / demodulation circuit 64 demodulates received radio waves and modulates transmitted radio waves. The baseband processing circuit 65 is
The original baseband signal is extracted from the demodulated signal output from the modulation / demodulation circuit 64 and supplied to the codec circuit 66, and, for example, character data is extracted from the demodulated signal and supplied to the control unit 70. Codec circuit 6
Reference numeral 6 designates a receiver 55 for converting the baseband signal output from the baseband processing circuit 65 into digital / analog.
And the output signal of the control unit 70 is digital-to-analog converted. The magnetic sensor 67 is composed of, for example, a Hall element, and when the mobile phone 40 is mounted and placed on the table 80 of the charging device, the magnetic detection signal M is generated by the magnetism of the magnet 81 built in the table 80 of the charging device. Occurrence occurs and the state where the same is mounted is detected. The clock unit 68 generates timekeeping information (year, month, day, day of the week, time). The storage unit 69 is, for example, a ROM (Read Only Memor).
y) and the like, and stores a control program for operating the control unit 70, data to be displayed on the sub display unit 53 and the main display unit 54, and the like.

The control unit 70 is composed of, for example, a CPU (central processing unit), and includes a line control unit 71, a mounting detection unit 72, and a display control unit 73, and controls the entire mobile phone 40. The line control unit 71 makes a call to a predetermined telephone number and connects to a predetermined Web server. As for the attachment detection unit 72, the own telephone is a stand 80 of the charging device.
The magnetic sensor 67 detects the magnetic detection signal M of the magnetic sensor 67 and generates the mounting detection signal N when mounted on the. Further, the mounting detection unit 72 is configured such that the generation of the mounting detection signal N is canceled by the user operating the operation unit 61. The display control unit 73 is composed of, for example, an LCD driver, drives the sub display unit 53 and the main display unit 54, converts the timekeeping information output from the clock unit 68 into display data, and displays the sub display unit. 53 and the main display 54. In addition, the display control unit 73 displays the display screen of the sub display unit 53 upside down with respect to the portable screen when the mounting detection signal N is generated from the mounting detection unit 72. The battery 90 supplies power to each unit in the mobile phone 40 and is charged from the stand 80 of the charging device via the charging power input terminal 91.

FIG. 4 is a flow chart for explaining the operation of the mobile phone 40 of FIG. 3, and FIG. 5 is a diagram showing a state in which the mobile phone of FIG. 1 is mounted on the stand 80 of the charging device and charged. is there. A control method of the mobile phone 40 of this embodiment will be described with reference to these drawings. In this mobile phone 40, when the folded state (closed state) is changed to the opened state, the operation section 61 is exposed, and the distance between the transmitter section (microphone) 62 and the receiver section 55 becomes appropriate, so It enables operations and voice calls. And the battery 9
When 0 is discharged, the mobile phone 40 is placed on the table 8 of the charging device.
It is mounted on 0 and charged. In this case, the power supply voltage supplied from the AC adapter 30 is supplied to the charging power supply input terminal 91 via the stand 80 of the charging device.

In addition, the portable telephone 40 is used as the base 8 of the charging device.
When it is mounted and mounted on 0, the magnetic sensor 67 generates a magnetic detection signal M due to the magnetic field of the magnet 81 built in the mounting table 80 of the charging device, and the mounted and mounted state is detected. The output signal M is sent to the mounting detection unit 72, and the mounting confirmation signal N is generated from the mounting detection unit 72 (step A1, mounting confirmation processing). When the mounting detection signal N is generated, the display screen of the sub display unit 53 is displayed in the reverse direction as shown in FIG. 5 (step A2, display change processing). In this case, the scanning order of the scanning lines of the sub display unit 53 is reversed as compared with the normal case, so that the display screen is turned upside down and is supplied to each data line of the sub display unit 53. The left and right sides of the same display screen are reversed because the data is reversed. The operation of the attachment detection unit 72 can be canceled by the user operating the operation unit 61. In this case, the mounting detection process and the display change process are not performed.

As described above, in the first embodiment,
When the mobile phone 40 is mounted on the mounting base 80 of the charging device, the mounting detection state is detected by the mounting detection unit 72, and the upper, lower, left, and right sides of the display screen of the sub-display unit 53 are compared with normal cases. Displayed in reverse. Therefore, the table 8 of the charging device
Even when 0 is placed on the table and the sub-display unit 53 is in the opposite direction to the user side, the display screen is in the normal direction to the user side and is easy to see. Further, the mounting detection unit 72 arbitrarily cancels the generation of the mounting detection signal N by the operation of the user, so that it is possible to easily cope with the case where the orientation of the display screen does not need to be changed.

[0028]Second embodiment FIG. 6 shows a mobile phone according to a second embodiment of the present invention.
FIG. 2 is an external view showing the elements in FIG. 1 showing the first embodiment.
The same reference numerals are given to the elements common to and. This form
In the case of the mobile phone 40A, as shown in FIG.
In place of the upper unit 50 in FIG.
The knit 50A is provided. With the upper unit 50A
Is a sub-table with a horizontally long shape instead of the sub-display section 53 in FIG.
A display portion 53A is provided. The sub display portion 53A is
For example, a screen with a vertical and horizontal direction such as a digital clock
indicate. Also, as in FIG. 1, the lower unit 60 is
It is connected to the side unit 50A via the hinge portion 51.
Has been.

FIG. 7 is a block diagram showing the internal electrical configuration of the upper unit 50A and the lower unit 60 in FIG. 6, and the elements common to those in FIG. 3 showing the first embodiment are the same. Common reference numerals are attached. As shown in FIG.
In this upper unit 50A, a sub display portion 53A is provided instead of the sub display portion 53 in FIG. Others are shown in FIG.
It has the same configuration as.

In this portable telephone 40A, as shown in FIG. 8, when the battery 90 is discharged, the portable telephone 40A is mounted on the stand 80 of the charging device and charged, and the display screen of the sub display 53A is , Top, bottom, left and right are displayed in reverse. Therefore, even when the table 80 of the charging device is placed on the table and the sub-display unit 53A is in the opposite direction to the user side, the display screen is in the normal direction to the user side and is easy to see. Becomes

[0031]Third embodiment FIG. 9 shows a mobile phone according to a third embodiment of the present invention.
FIG. 7 is an external view showing the elements in FIG. 6 showing the second embodiment.
The same reference numerals are given to the elements common to and. This form
The mobile phone 40B of FIG.
Instead of the lower unit 60 in 6, the lower unit with a different internal configuration is used.
The side unit 60A is provided. Also, as in FIG.
In addition, the lower unit 60A with respect to the upper unit 50A
They are connected via a hinge portion 51.

FIG. 10 is a block diagram showing the internal electrical configuration of the upper unit 50A and the lower unit 60A in FIG. 9, and elements common to those in FIG. 7 showing the second embodiment are not shown. Common reference numerals are attached. As shown in FIG. 10, in the lower unit 60B, the magnetic sensor 6 in FIG.
The voltage sensor 6A and the control unit 70A are provided in place of the control unit 70 and the control unit 70. Further, in this embodiment, the conventional charging device stand 20 in FIG. 13 is used in place of the charging device stand 80 in FIG. 7. The voltage sensor 6A is
When the own telephone 40B is mounted and placed on the table 20 of the charging device, the voltage detection signal P is output based on the voltage supplied from the table 20 of the charging device. In the control unit 70A, a mounting detection unit 72A having a different function is provided instead of the mounting detection unit 72 in FIG. Attachment detector 72A
Detects the voltage detection signal P of the voltage sensor 6A and generates a mounting detection signal N. In addition, the mounting detection unit 72A causes the mounting detection signal N to be generated when the user operates the operation unit 61.
The occurrence of is released. Others are the same as that of FIG.

In this mobile phone 40B, when the battery 90 is discharged, the mobile phone 40B is mounted on the base 20 of the charging device.
It is mounted and placed on and charged. At this time, as shown in FIG. 11, the voltage supplied from the stand 20 of the charging device is detected by the voltage sensor 6A, and the voltage sensor 6A outputs the voltage detection signal P (step B1, voltage detection processing).
The voltage detection signal P is detected by the mounting detection unit 72A, and the mounting detection signal N is generated from the mounting detection unit 72A (step B2, mounting detection process). After that, as in the second embodiment, the display screen of the sub display unit 53A is displayed upside down, left and right (step B3, display change processing). Therefore, even when the table 20 of the charging device is placed on the table and the sub-display unit 53A is in the opposite direction to the user side, the display screen is in the normal direction to the user side and is easy to see. Becomes
Further, it is not necessary to use the built-in magnet 81 like the stand 80 of the charging device in the first and second embodiments, and the stand 20 of the conventional charging device can be used.

The embodiment of the present invention has been described in detail above with reference to the drawings. However, the specific configuration is not limited to this embodiment, and there are design changes and the like within the scope not departing from the gist of the present invention. Also included in the present invention. For example,
The display screens of the sub-display units 53 and 53A are not limited to the display of an analog clock or a digital clock, and are displayed in an up / down / left / right direction such as an animation display, a message of an incoming call, a state of radio wave strength, a battery level, various characters, and the like. Any information can be used as long as it has the information. Further, in each of the embodiments, the mobile phones 40, 40A, 40B are mounted on the bases 80, 20 of the charging device.
The display screens of the sub-display units 53 and 53A are displayed in the reverse direction when mounted and mounted on the screen, but may be changed to the horizontal direction and displayed. However, in this case, the display control unit 73 needs to have a function of changing the display screens in the sub-display units 53 and 53A to the horizontal direction.

Further, the sub display portions 53, 53A and the main display portion 54 may be, for example, EL (electroluminescence) in addition to the LCD. Further, the magnetic sensor 67 may be, for example, a reed switch or the like instead of the Hall element.
Further, instead of the clock unit 68 in FIG. 3, FIG. 7 or FIG.
A standard radio wave receiving means for receiving the standard radio wave including the standard time information may be provided. In this case, more accurate time can be displayed on the sub-display units 53 and 53A. Moreover, the voltage sensor 6A and the attachment detection unit 72A in the third embodiment can be applied to the first embodiment.

[0036]

As described above, according to the configuration of the present invention, when the portable telephone is mounted on the mounting base of the charging device, the mounting confirmation state is detected by the mounting confirmation means, The display screen of the display unit is changed and displayed in a preset direction. For this reason, even if the stand of the charging device is placed on the table and the orientation of the sub-display is not normal to the user side, the display screen of the sub-display is oriented normally to the user. It is easy to see. In addition, when the mobile phone is mounted on the mounting table of the charging device, the mounting confirmation state is detected by the mounting confirmation means, and the upper, lower, left, and right sides of the display screen of the sub-display unit are reversed from the normal case. Is displayed. Therefore, even if the stand of the charging device is placed on the table and the sub-display unit faces the user side, the display screen of the sub-display unit will be in the normal direction to the user side. ,
You can make it easy to see. Further, since the generation of the mounting detection signal is arbitrarily canceled by the mounting confirmation means, it is possible to easily cope with the case where it is not necessary to change the orientation of the display screen.

The mounting confirmation means includes a voltage sensor that outputs a voltage detection signal based on the voltage supplied from the charging device stand when the own telephone is mounted on the charging device stand, and the same voltage. Since it is composed of the mounting detection unit that outputs the mounting detection signal based on the detection signal, it is not necessary to change the mounting base of the charging device, and the mounting base of the conventional charging device can be used as it is.

[Brief description of drawings]

FIG. 1 is an external view showing a closed state of a foldable mobile phone according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a state in which the mobile phone 40 of FIG. 1 is mounted and placed on a stand 80 of the charging device in an open state.

3 is a block diagram showing an electrical configuration of the mobile phone 40 of FIG.

FIG. 4 is a flowchart for explaining the operation of the mobile phone of FIG.

5 is a diagram showing a state in which the mobile phone of FIG. 1 is mounted and placed on a stand 80 of a charging device to be charged.

FIG. 6 is an external view of a mobile phone according to a second embodiment of the present invention.

7 is a block diagram showing an internal electrical configuration of an upper unit 50A and a lower unit 60 in FIG.

8 is a diagram showing a state in which the mobile phone of FIG. 6 is mounted and placed on a stand 80 of a charging device and is charged.

FIG. 9 is an external view showing a mobile phone according to a third embodiment of the present invention.

10 is a block diagram showing an internal electrical configuration of an upper unit 50A and a lower unit 60A in FIG. 9.

11 is a flow chart for explaining the operation of the mobile phone of FIG.

FIG. 12 is an external view showing a closed state of a conventional foldable mobile phone.

13 is a diagram showing a state in which the mobile phone of FIG. 12 is mounted and placed on a stand 20 of the charging device in an open state.

FIG. 14 is a diagram showing a state in which the mobile phone of FIG. 12 is mounted and placed on a stand 20 of a charging device to be charged.

[Explanation of symbols]

40, 40A, 40B Mobile phone 50, 50A Upper unit (first unit) 51 Hinge part 52 Antennas 53, 53A Sub display part 54 Main display part 60, 60A Lower unit (second unit) 61 Operation part 67 Magnetic Sensor (mounting confirmation means) 68 Clock section 70, 70A Control section (display direction changing means) 72, 72A Mounting detection section (mounting confirmation means) 73 Display control section (display direction changing means) 80 Charging device stand 90 Battery voltage sensor 6A and control unit 70A Attachment detection unit 72A

Claims (12)

[Claims] 1. A first unit having a main display section on a first front surface and a sub display section on a back surface, and a second unit having a button operation section on a second front surface, the first unit comprising: And a second front surface is a mobile phone configured such that the first unit and the second unit are folded via a hinge portion in a state where they face each other, and the phone is mounted on a stand of a charging device. A mounting confirmation signal output means for outputting a mounting confirmation signal when placed, and a display direction of the screen displayed on the sub-display unit based on the mounting confirmation signal from a screen when carrying to a screen when charging. A mobile phone comprising a display direction changing means for changing the display direction. 2. A first unit provided with an antenna and having a main display section on a first front surface and a sub display section on a back surface, and a second unit having a button operation section on a second front surface. A mobile phone configured such that the first unit and the second unit are folded via a hinge portion in a mode in which the first and second front surfaces face each other. A mounting confirmation means for outputting a mounting confirmation signal when mounted and mounted on the stand of the charging device, and a display direction of a screen displayed on the sub-display unit based on the mounting confirmation signal with respect to a screen when being carried. And a display direction changing means for displaying the image by turning it upside down or sideways. 3. The mounting confirmation means includes a voltage sensor that outputs a voltage detection signal based on a voltage supplied from the mounting base of the charging device when the own telephone is mounted on the mounting base of the charging device. The mobile phone according to claim 1 or 2, further comprising: a mounting detection unit that outputs a mounting detection signal based on the voltage detection signal. 4. The mobile phone according to claim 1, 2 or 3, wherein the mounting confirmation means is configured to arbitrarily release the generation of the mounting detection signal. 5. The mobile phone according to claim 1, 2, 3, or 4, wherein the sub display unit is configured to display an analog clock screen. 6. The mobile phone according to claim 1, wherein the sub display unit is configured to display a screen of a digital clock. 7. A first unit having a main display section on a first front surface and a sub display section on a back surface, and a second unit having a button operation section on a second front surface, wherein: And a mobile phone configured such that the first unit and the second unit are folded with a hinge portion in such a manner that the second front faces face each other. And a display change to change the display direction of the screen displayed on the sub-display from the screen on the mobile phone to the screen on the charge based on the installation confirmation signal. And a control method characterized by performing processing. 8. A first unit provided with an antenna and having a main display section on a first front surface and a sub display section on a back surface, and a second unit having a button operation section on a second front surface. A mobile phone configured such that the first unit and the second unit are folded with a hinge portion in a manner such that the first and second front faces face each other. The mounting confirmation processing for outputting a mounting confirmation signal when mounted and placed on the table, and the display direction of the screen displayed on the sub-display unit is reversed with respect to the screen when being carried based on the mounting confirmation signal. Alternatively, the control method is characterized by performing a display change process of changing and displaying in a horizontal direction. 9. In the mounting confirmation process, a voltage detection process of outputting a voltage detection signal based on a voltage supplied from the charging device stand when the own telephone is mounted and placed on the charging device stand. 9. The control method according to claim 7, further comprising: mounting detection processing for outputting a mounting detection signal based on the voltage detection signal. 10. The control method according to claim 7, wherein in the mounting confirmation processing, the generation of the mounting detection signal is arbitrarily canceled. 11. The display screen of the sub display unit is a screen of an analog clock.
The control method according to 8, 9, or 10. 12. The display screen of the sub display unit is a screen of a digital clock.
The control method according to 8, 9, or 10.