JPH0774691A - Portable telephone set with folding mechanism - Google Patents

Abstract

PURPOSE:To avoid sacrificed durability for the detection of a switching state of a folding mechanism and to save power supply of a battery. CONSTITUTION:Photosensors 1, 2 arranged at least at two positions of one face in a face having a dial key 3 and a face not having the dial key 3 opposite to each other to sense the lightness of the surrounding senses darkness of the surrounding, and when an operating state detection means detecting the operating state detects the operating state through the operation of the dial key 3 within a predetermined time, an LED 9 lighting the dial key 3 and back light of an LCD 6 is lighted, and when the photosensor 2 receives the light of the LED 9 blinked at all times in the power supply application state and is in the light coupling state, the mode is set to a low power consumption state able to receive an incoming call only.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable telephone with a folding mechanism such as a cordless telephone handset or a cell type automobile telephone.

[0002]

2. Description of the Related Art In recent years, mobile phones such as cordless telephone handsets or cell type mobile telephones have a transmitter part near the user's mouth and a receiver part near the user's ear when in use, and when not in use. In order to make it as compact as possible, it has a folding mechanism that allows the surface with the dial key and the surface without the dial key to fold face to face, and the transmitter and the receiver on each surface. The type that has been placed is becoming popular.

A mobile phone having such a folding mechanism needs to detect whether it is in a closed state or not, and for this reason, it is necessary to dispose a mechanical switch or a sensor in the folding mechanism portion. It was Further, in order to omit such a switch or sensor, for example, Japanese Patent Laid-Open No. 4-259156.
In the technique disclosed in Japanese Patent Publication, at least two convex portions are provided on the surface not having the dial keys, and the two convex portions press different dial keys in a folded state. The folded state is detected by detecting the state.

On the other hand, when pursuing the portability of a mobile phone, it is necessary to save the consumption of the battery, which occupies the most volume and weight in the structure, so that it can be used for a long time. Therefore, for example, in the technique disclosed in Japanese Patent Laid-Open No. 4-233854, by using one photosensor to detect the brightness of the surroundings, the illumination of the dial keys and the LCD back light in a bright place. The light emitting element for writing is controlled not to be driven.

[0005]

However, Japanese Unexamined Patent Publication (Kokai) No. 4-2.
In the technique described in Japanese Patent No. 59156, it is necessary that the two convex portions accurately continue to press a predetermined dial key with a predetermined strength. Further, since only these two dial keys are frequently pressed and rubbed by the hard substance forming the casing of the mobile phone, there is a problem in durability of the mobile phone.

Further, according to the technique disclosed in Japanese Patent Laid-Open No. 4-233854, the open / closed state of a mobile phone having a folding mechanism cannot be detected. Therefore, in the mobile phone with a folding mechanism, the user operates some switch or the like. It is necessary to set whether or not it is folded.

[0007] Therefore, an object of the present invention is to provide a mobile phone with a folding mechanism that can save battery consumption without making durability meaningful to detect the open / close state of the folding mechanism. It is a thing.

[0008]

A mobile phone with a folding mechanism according to a first aspect of the present invention is a mobile phone with a folding mechanism, wherein a surface having a dial key and a surface not having the dial key face each other, and both surfaces are folded to face each other. A folding mechanism that can be developed so that both surfaces thereof are substantially flush with each other, an LED that illuminates the dial key and a backlight of the LCD, and at least two locations on the one surface that faces each other are provided, and ambient brightness is provided. An optical sensor for detecting the height, an LED arranged on the other surface facing one of the optical sensors when folded and constantly blinking in a power-on state, and an operation of the dial key within a predetermined time. The use state detecting means for detecting the use state and the use state detecting means detect the use state, and the optical sensors arranged at the two places detect that the surroundings are dark. Doing When the LED for lighting the dial key and the backlight of the LCD is turned on, and when one of the optical sensors receives the light of the LED that constantly blinks in the power-on state, only an incoming call is possible. And a control means for setting a low power consumption state.

In the mobile phone with the folding mechanism according to a second aspect of the invention, the two optical sensors are shared and one optical sensor is used.

[0010]

According to the first aspect of the present invention, the optical sensor for detecting the brightness of the surroundings is provided in at least two places on one surface where the surface having the dial key and the surface not having the dial key are opposed to each other. Illumination of the dial key is detected when the usage state detecting means for detecting the usage state by detecting that the dial key is operated within a predetermined time is detected. Also, the LED for backlighting the LCD is turned on. Then, when one of the optical sensors receives the light of the LED that constantly blinks in the power-on state, and when in the optical coupling state, it is in a low power consumption state in which only incoming calls are possible.

According to a second aspect of the present invention, a surface having a dial key and a surface not having the dial key are disposed on one surface facing each other, and an optical sensor for detecting the brightness of the surroundings detects that the surroundings are dark. Further, when the use state detecting means for detecting the use state by operating the dial keys within a predetermined time detects that the use state is in use, the illumination of the dial keys and the backlight of the LCD are detected. The LED is turned on. Then, when the optical sensor receives the light of the LED that constantly flashes in the power-on state and is in the optical coupling state, it is in a low power consumption state in which only incoming calls are possible.
That is, the optical sensor determines whether it is blinking light or natural light.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A mobile phone with a folding mechanism according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a front view (a) showing a folded state and an antenna housed state of a mobile phone with a folding mechanism according to an embodiment of the present invention, and also with the folding mechanism open and the antenna extended state. It is a front view (b) shown. Figure 2
FIG. 3 is a block configuration diagram showing each processing unit and a main power supply path of a mobile phone with a folding mechanism according to an embodiment of the present invention.

FIG. 3 is an explanatory view showing the surrounding brightness and the detection states of the optical sensors 1 and 2 by opening and closing the folding mechanism of the mobile phone with a folding mechanism according to one embodiment of the present invention. In addition, FIG. 4 is an explanatory diagram showing a power supply state to each component according to each state of the mobile phone with a folding mechanism according to one embodiment of the present invention.

Throughout this embodiment, the side having the surface having the dial keys 3 is called the main body, and the side having the surface not having the dial keys 3 is called the cover.

In FIG. 1, an optical sensor 1 detects external light, an optical sensor 2 detects light from an LED 9 facing the folding mechanism 7 when the folding mechanism 7 is closed, and an external light when the folding mechanism 7 is open. Is a photodetector for detecting the ambient light, and is arranged at a location not hidden by the cover on the main body side so that the ambient brightness can be detected when the folding mechanism 7 is opened and closed. The dial keys 3 are a numeric keypad for mainly inputting a telephone number and the like and function keys. The antenna 4 is a retractable type and is expandable and contractible. Further, the speaker 5 functions as a receiver, and the microphone 8 functions as a transmitter. The speaker 5 and the microphone 8 are arranged on a diagonal line between the main body and the cover so that a distance between the user's ear and mouth can be secured during a call even if the whole is compact. The LCD 6 for display is a liquid crystal display means for displaying the necessary items when displaying the dial of the other party or selecting another function. Since this LCD 6 needs to display the other party's number etc. when an incoming call is received in the "standby open mode" to be described later, it is arranged at a position not covered by the cover so that the user can check it even when folded. There is.
The folding mechanism 7 is a foldable mechanism that functions as a hinge between the main body having the dial keys 3 and the cover not having the dial keys 3. The LED 9 indicates a power-on state, and is also used to indicate opening / closing of the folding mechanism 7. The LED 9 blinks a predetermined number of times in the power-on state, and continuously blinks in the power-on state regardless of the control of the central processing unit (CPU) 10. Since it is only necessary for the user to confirm the state of the LED 9 when the power is turned on, the LED 9 may be in a slow blinking state of about 20 Hz or less, or the lighting time may be shortened by the duty ratio of the lighting time to save battery consumption. There is. In particular, in this embodiment, the folding mechanism 7 can be confirmed in the open and closed states.

In FIG. 2, the main power source is a central processing unit 10, a data processing unit 16, an LED 18 for illumination and a backlight, and an LED controller 19 for controlling an LED 9 indicating a power-on state, optical sensors 1 and 2. Power is supplied to the input interface (I / F) 13, the power source selector 17, and the switch 21, which input the detection signal from the.

Further, the central processing unit 10 is responsive to the outputs of the data processing unit 16 to which the detection outputs of the optical sensors 1 and 2 and the detection outputs of various detecting means are supplied, and the power source selector 1
RF that controls 7 and receives radio waves by switch 21
The reception unit 11, the RF transmission unit 14 for outputting as a radio wave, the display unit controller 20 for controlling the LCD 6 for display, the voice interface 1 for controlling the speaker 5 and the microphone 8.
5. Power is supplied to necessary circuits for the input interface 12 for inputting the signal of the dial key 3.

Here, the power supply in each state of the mobile phone with the folding mechanism of this embodiment will be described with reference to FIG.

First, the "power-off mode" means that a main switch (not shown) is turned off in a state where the main power source of the folding mechanism-equipped mobile phone of this embodiment is not supplied to all the processing units. The battery pack is removed or the battery is discharged.

The "standby open mode" means that the main power source of the mobile phone with the folding mechanism according to the present embodiment is turned on, but the user does not feel like using it at that time and operates the incoming call and the dial key 3. Can only accept. Normal,
In consideration of waiting for an incoming call, the user unfolds the mobile phone with the folding mechanism such that the surface having the dial keys 3 and the surface not having the dial keys 3 are substantially flush with each other. That is, in this case, the central processing unit 10, the peripheral processing unit, the RF receiving unit 11, the input interface 12, and the input interface 13 are activated in order to receive the incoming call and the operation of the dial key 3. The LEDs 18 for illumination and backlight are off.

The "standby closed mode" is a state in which the dial key 3 is folded so that the surface having the dial key 3 and the surface not having the dial key 3 face each other, and the dial key 3 is covered with a cover. Since no operation is possible, no power is supplied to the input interface 12, and the central processing unit 10, peripheral processing unit, RF receiving unit 11, and input interface 13 are activated. Therefore, although the incoming call is possible, the illumination LED 18 and the backlight LED 18 are turned off, and the power saving state is the most. This is "closed" of the folding mechanism 7 in "standby open mode" in FIG.
Means the state of.

The "standby mode" is a state in which the dial key 3 is being operated and is not used for a call such as making / receiving a call / calling / holding, inputting a calling number or registering / calling a phone number. Calling is applicable. At this time, RF
Power is supplied to all processing units except the transmission unit 14 and the voice interface 15. Naturally, the LEDs 18 for illumination and backlight are on.

"Active mode" means outgoing / incoming / incoming
It is a state in which it is used for a call such as a call / hold, and is a state in which power is supplied to all the processing units and the battery is consumed most. Naturally, LEDs for lighting and backlight
18 is lit.

Next, the control operation of the mobile phone with the folding mechanism of this embodiment will be described.

FIG. 5 is a flow chart of a program showing the operation of the mobile phone with the folding mechanism according to the embodiment of the present invention.

When a main power switch (not shown) is turned on, the central processing unit 10 starts the processing of a main program (not shown), and this routine is repeatedly called. In step S1, it is determined whether the dial key 3 has been operated within a predetermined time, and when the dial key 3 has been operated within the predetermined time, it is determined in step S2 whether the optical sensor 1 detects ambient light. When the ambient light is detected, the LEDs 18 for illumination and the backlight are turned off in step S3, and when the optical sensor 1 does not detect the ambient light, in step S4, the illumination and the backlight LEDs are used. LED
Turn on 18. Then, it is determined in step S5 that the operation of the dial key 3 is completed. If the operation of the dial key 3 is not completed, the "standby mode" is executed in step S6. When it is determined in step S5 that the operation of the dial key 3 is completed, the "active mode" is executed in step S7.

When it is determined in step S1 that the dial key 3 has not been operated within the predetermined time, it is determined in step S8 whether the optical sensor 2 detects the blinking light of the LED 9 indicating the power-on state, and When the sensor 2 does not detect the blinking light of the LED 9 indicating the power-on state, the illumination and backlight LEDs 18 are turned off in step S9, and the "standby open mode" is executed in step S10. Further, when the optical sensor 2 detects the blinking light of the LED 9 indicating the power-on state, the illumination and backlight LEDs 18 are turned off in step S11, and step S1 is performed.
Execute "standby closed mode" in 2.

That is, when the light sensor 1 is bright, it means that the surroundings are bright, and when it is dark, it means that the surroundings are dark. If the light sensor 2 detects a predetermined blink, the folding mechanism 7 is closed. Detects the folding state of. Therefore, when the optical sensor 2 detects the blinking light of the LED 9 indicating the power-on state, it is not necessary to turn on the illumination and backlight LEDs 18, so that the LED 18 is turned off. 』 Further, when the dial key 3 is operated within a predetermined time and the optical sensor 1 does not detect ambient light, the LEDs 18 for illumination and backlight are turned on,
Eliminate mistakes in operating the dial keys 3. Therefore, it becomes as shown in the explanatory view of FIG.

As described above, in the mobile phone with the folding mechanism according to the present embodiment, the surface having the dial key 3 and the surface not having the dial key 3 face each other, and both surfaces can be folded so that they face each other, or both surfaces face each other. In a mobile phone with a folding mechanism equipped with a folding mechanism 7 that can be developed so as to be substantially on the same plane, an LED for illuminating the dial key 3 and backlighting the LCD 6
18, optical sensors 1 and 2 arranged at least at two positions on one of the facing surfaces to detect ambient brightness, and a power source arranged on the other surface facing the optical sensor 2 when folded. The LED 9 that constantly flashes in the closed state, the use state detection unit including step S1 that detects the use state by the operation of the dial key 3 within a predetermined time, and the light sensors 1 and 2 have dark surroundings. , And when the use state detecting means detects that it is in the use state,
When the LED 18 for illuminating the dial keys and the backlight of the LCD is turned on, and when the light sensor 2 receives the light of the LED 9 which constantly flashes in the power-on state, it is in a low power consumption state in which only incoming calls can be made. Step S
11 and the control means comprising step S12, which can be the embodiment of claim 1.

Therefore, one surface where the surface having the dial key 3 and the surface not having the dial key 3 face each other,
Optical sensors 1 and 2 that are provided at least at two places and detect the ambient brightness detect that the surroundings are dark, and also detect the usage state by operating the dial keys 3 within a predetermined time. When the use state detecting means for detecting that the use state is in use, the illumination of the dial key 3 and the LCD
The LED 9 for backing up the LED 6 is turned on, and the LED 9 that constantly blinks when the optical sensor 2 is powered on.
When the light is received and is in the optical coupling state, it is in a low power consumption state in which only incoming calls can be made. On the contrary, when the dial key 3 is operated within a predetermined time and the optical sensor 1 does not detect the ambient light, the LED 18 for illumination and the backlight is turned on to illuminate the dial key 3 in order to eliminate operation mistakes. To do.

In the present embodiment, in particular, the optical sensor 2 receives the light of the LED 9 which constantly blinks when the power is on, and enters the optical coupling state. Unlike natural light, the blinking light is used, and thus malfunctions occur. Can be prevented.

In the case of implementing the present invention, when the dial key 3 is operated or there is an outgoing / incoming call / call / hold, the LED 18 for illumination of the dial key 3 and the backlight of the LCD 6 for display. Is about 10
You can also keep it on for a second. In particular, since it is difficult to see the dial keys 3 and the LCD 6 for display in a dark place, the illumination and the backlight are turned on in the initial state, and there is an effect of preventing an erroneous operation due to a user's operation error, misreading, or the like. However, under the condition that the LED 18 for illumination of the dial key 3 and the backlight of the LCD 6 for display is not required to be turned on, the LED 18 is turned off to reduce the consumption of the battery.

In the known mobile phone, the dial key 3 is not operated for a predetermined time, or the call / call / call / call is made.
If there is no hold, the timer automatically operates and goes into "standby open mode". However, in this embodiment, when the folding mechanism 7 is closed, the dial keys 3 cannot be operated, so it can be clearly determined that the mode is the "standby closed mode" or the "power off mode". No need. Therefore, when the folding mechanism 7 is closed from the open state, it may be controlled so as to immediately enter the "standby close mode". As shown in the explanatory view of Fig. 4, the "standby open mode" in the open state. The input interface 12 for detecting the operation of the dial key 3 is immediately connected to the display controller 20 and the illumination unit from the standby state, and the RF transmission unit 14 and the voice interface 15 are immediately connected from the active state. The power can be turned off, which has the effect of reducing battery consumption.

In the present embodiment, only two optical sensors 1 and 2 are added to the hardware that is generally provided in a generally known portable telephone. Since the LED 9 for the optical sensor 2 can also be used as a power supply lamp, an existing circuit can be used, and the LED 9 can be manufactured at low cost.

By the way, the LED 18 of the above embodiment is for illuminating the dial key 3 and the backlight of the LCD 6. However, in the case of implementing the present invention, the illumination of the dial key 3 and the backlight of the LCD 6 are: It can be arranged as a plurality of groups.

Further, the optical sensors 1 and 2 of the above-mentioned embodiment are arranged at least at two positions on one surface facing each other to detect the ambient brightness. However, when the present invention is carried out, It is possible to use two or more, one for receiving ambient light and one for receiving power supply display.

The LED 9 of the above-mentioned embodiment is arranged on the other surface facing the optical sensor 2 when folded, and constantly blinks in a power-on state. , Can be modulated to clarify the difference with natural light.

Further, the use state detecting means of the above embodiment is
This is composed of step S1 of detecting the use state depending on whether or not the dial key 3 is operated within a predetermined time. However, when the present invention is carried out, even if there is any change in the input, it is used with it. It can be in a state.

Furthermore, when the optical sensor 1 detects that the surroundings are dark and the usage state detecting means detects that it is in use, the control means of the above-described embodiment illuminates the dial key and LED for backlighting LCD
When the light sensor 18 is turned on and the light sensor 2 is receiving the light of the LED 9 that constantly flashes in the power-on state, the central processing unit includes steps S11 and S12 for setting a low power consumption state in which only incoming calls can be made. Although the processing is performed by the unit 10, when the present invention is implemented, it may be configured by a logic circuit under the above-mentioned conditions. And the optical sensor 2
Since the output of the optical sensor 1 does not make sense when the light of the LED 9 that constantly flashes in the power-on state is received, the optical sensor 1 and the optical sensor 2 can be shared. At this time, since it is determined whether the light is blinking light or natural light by one optical sensor, the number of parts can be reduced and the cost can be reduced.

As a precaution, in the structure of the mobile phone with the folding mechanism when the optical sensor 1 and the optical sensor 2 are shared, the surface having the dial key 3 and the surface not having the dial key 3 face each other, and both surfaces are In a mobile phone with a folding mechanism, which includes a folding mechanism 7 that can be folded so as to face each other or can be developed so that both surfaces thereof are substantially flush with each other, the illumination of the dial key 3 and LC
An LED 18 for backlighting D6, an optical sensor 2 arranged on the one surface facing each other to detect ambient brightness, and a power source arranged on the other surface facing the optical sensor 2 when folded. The LED 9 that constantly flashes in the closed state, the use state detecting means including step S1 that detects the use state by operating the dial key 3 within a predetermined time, and the optical sensor 2 detects that the surroundings are dark. And
When the usage state detecting means detects that the LED 18 is illuminated, the LED 18 for illuminating the dial key and the backlight of the LCD is turned on, and the LED 9 for constantly blinking the light sensor 2 when the power is on. It is provided with a control means comprising steps S11 and S12 for setting a low power consumption state in which only an incoming call is possible while receiving light, which can be an embodiment of claim 2.

[0042]

As described above, in the portable telephone with the folding mechanism according to the first aspect of the present invention, at least two faces of the face having the dial key and the face not having the dial key face each other.
A usage state detecting means arranged at a location to detect that the surroundings are dark by an optical sensor that detects the brightness of the surroundings, and to detect the usage state by operating the dial key within a predetermined time. LED is used to illuminate the dial keys and the backlight of the LCD when it detects that the LED is in use, and one of the photosensors constantly flashes when the power is on. When the light is received and is in the optical coupling state, it is in a low power consumption state in which only incoming calls can be made. Therefore, the open / closed state of the folding mechanism can be determined without using a mechanical switch or a mechanical sensor, and the ambient brightness can be detected. You can save battery consumption without making sense.

In addition to the effect of the first aspect, the mobile phone with the folding mechanism according to the second aspect uses one optical sensor to determine whether the light is blinking light or natural light.
The number of parts can be reduced, and the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a front view (a) showing a folded state and an antenna housed state of a mobile phone with a folding mechanism according to an embodiment of the present invention;
It is a front view (b) which shows an antenna extension state in the state which opened the folding mechanism.

FIG. 2 is a block configuration diagram showing each processing unit and a main power supply path of the mobile phone with a folding mechanism according to an embodiment of the present invention.

FIG. 3 is an explanatory diagram showing the surrounding brightness and the detection state of the optical sensor when the folding mechanism of the mobile phone with the folding mechanism according to the embodiment of the present invention is opened and closed.

FIG. 4 is an explanatory diagram showing a power supply state to each component according to each state of the mobile phone with a folding mechanism according to an embodiment of the present invention.

FIG. 5 is a flowchart of a main program showing an operation of the mobile phone with the folding mechanism according to the embodiment of the present invention.

[Explanation of symbols]

 1, 2 Optical sensor 3 Dial key 4 Antenna 5 Speaker 6 LCD 7 Folding mechanism 8 Microphone 9 LED 10 Central processing unit

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[Procedure amendment]

[Submission date] October 19, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0016

[Correction method] Change

[Correction content]

In FIG. 1, an optical sensor 1 is a sensor for detecting outside light, and when the folding mechanism 7 is opened and closed, the ambient brightness is
Place it in a place not hidden by the cover on the main unit so that it can be detected.
It is set up. Also, the optical sensor 2 is closed when the folding mechanism 7 is closed.
When the light from the LED 9 facing each other is detected, the folding mechanism 7 is opened.
Is a photodetector that detects external light. Dial key 3
Is a numeric keypad and a function key mainly for inputting a telephone number and the like. The antenna 4 is a retractable type and is expandable and contractible. Further, the speaker 5 functions as a receiver, and the microphone 8 functions as a transmitter. The speaker 5 and the microphone 8 are arranged on a diagonal line between the main body and the cover so that a distance between the user's ear and mouth can be secured during a call even if the whole is compact. The LCD 6 for display is a liquid crystal display means for displaying the necessary items when displaying the dial of the other party or selecting another function. Since this LCD 6 needs to display the other party's number etc. when an incoming call is received in the "standby open mode" to be described later, it is arranged at a position not covered by the cover so that the user can check it even when folded. There is. The folding mechanism 7 is a foldable mechanism that functions as a hinge between the main body having the dial keys 3 and the cover not having the dial keys 3. The LED 9 indicates a power-on state, and is also used to indicate opening / closing of the folding mechanism 7. The LED 9 blinks a predetermined number of times in the power-on state, and continuously blinks in the power-on state regardless of the control of the central processing unit (CPU) 10. This LE
D9 is a power-on state, and it suffices if the state can be confirmed by the user. Therefore, the lighting time is shortened by a slow blinking state of about 20 Hz or less, or by the duty ratio of the lighting time to save battery consumption. . In particular, in this embodiment, the folding mechanism 7 can be confirmed in the open and closed states.

Claims (2)

[Claims] 1. A folding mechanism is provided such that a surface having a dial key and a surface not having the dial key face each other and can be folded so that both surfaces face each other, or both surfaces are substantially flush with each other. In the mobile phone with a folding mechanism, an LED for illuminating the dial key and a backlight for the LCD, and an optical sensor arranged at least at two positions on one of the facing surfaces to detect ambient brightness. The LED which is arranged on the other surface facing one of the optical sensors when it is folded, and which constantly flashes when the power is turned on, and the operation state of the dial key operated by the dial key operation within a predetermined time. A use state detecting means for detecting, and detecting that the use state detecting means is in use state,
Further, when the light sensors arranged at the two locations detect that the surroundings are dark, the illumination of the dial key and L
Turn on the LED that backs up the CD,
When one of the optical sensors receives light of an LED that constantly blinks in a power-on state, it has a control means for setting a low power consumption state in which only an incoming call can be received. Mobile phone. 2. A folding mechanism is provided so that a surface having a dial key and a surface not having the dial key face each other and can be folded so that both surfaces face each other, or can be developed so that both surfaces are substantially flush with each other. In a mobile phone with a folding mechanism, an LED for illuminating the dial key and a backlight for an LCD, an optical sensor for detecting the ambient brightness provided on one of the surfaces facing each other, and an LED when folded. An LED which is disposed on the other surface facing the optical sensor and which constantly blinks in a power-on state; a usage state detecting means for detecting a usage state by operating the dial key within a predetermined time; Detecting that the usage status detection means is in the usage status,
Further, when the light sensor detects that the surroundings are dark, the LED for lighting the dial key and the backlight of the LCD is turned on, and the light of the LED constantly blinking in the power-on state. A mobile phone with a folding mechanism, comprising: a control means for setting a low power consumption state in which only an incoming call can be received while receiving a light.