JP2006050505A - Electronic device, power-saving method, and power-saving program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To detect that a part of a body is in contact, while an electronic device such as a mobile telephone is used, and to turn a display portion off. <P>SOLUTION: As a method of detecting whether a part of a body touches an electronic device, there are means of detecting a reflected sound of an ultrasound outputted from a telephone receiver to be determined and controlled, means detecting the reflected sound of a voice outputted from the telephone receiver to be determined and controlled, and means detecting by a camera toward a direction facing the part of the body while it is used to be determined and controlled, and any means or each of the means are combined as appropriate. In the electronic device, on which the above-mentioned detection function is mounted, there is a means for turning power supply to a display portion on, by depressing an arbitrary button or a predetermined button by a user, when a usage display portion is off. This means is also combined with any or each of the above-mentioned means as appropriate. Alternatively, there is a function and a means setting a detection function on and off by a user. This means is also combined with any or each of the means appropriately. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to an electronic device, a power saving method, and a power saving program.

  A mobile phone will be described as an example of an electronic device. During the use of the mobile phone, the user puts the receiving unit of the mobile phone on his / her ear, and thus does not see the display unit, for example. Since a general mobile phone cannot determine whether or not the user is placing the earpiece on his / her ear, power is supplied unnecessarily to the display unit that cannot be seen during a call.

  In addition, when using a mobile phone with a TV phone function in the TV phone mode, the display unit that cannot be seen, a camera that is not used, and image transmission / reception when moving to a general call state where the receiver is placed on the ear Since power was also supplied to the codec, the power was wasted.

  As a conventional technology to deal with these problems, the distance between the mobile phone and the user is detected by the light level sensor and the distance sensor that are input from the microphone and the optical sensor installed in the earpiece, and the normal call position is set. Some control the operation of the display function by determining whether or not there is. (See Patent Document 1).

However, in the above prior art, it is necessary to add new parts to the optical sensor and the distance sensor installed in the earpiece part.
In addition, the sound level input from the microphone is likely to be affected by the loudness of the user's voice and the environment in use and may be inaccurate, and the power consumption increases because detection control is constantly performed during use.

  In addition, some conventional techniques control the operation of the display function by detecting the inclination of the main body housing (see Patent Document 2).

  However, in the above prior art, there is detection of the inclination of the main body casing, but the inclination of the mobile phone and the call state generally have no correlation. Further, since the detection control is constantly performed during use, the power consumption increases.

JP2002-111801 JP 07-307776

SUMMARY OF THE INVENTION An object of the present invention is to provide an electronic device, a power saving method, and a power saving program that determine whether a user is touching a part of the body with the electronic device and save power and normal power. .
Another object of the present invention is to provide an electronic device, a power saving method, and a power saving program that detect and control a reflected ultrasonic wave when a user receives an ultrasonic wave output from a receiver.
Another object of the present invention is to provide an electronic device, a power saving method, and a power saving program for detecting and controlling the reflected voice detected by the voice output from the receiver unit.
Another object of the present invention is to provide an electronic device, a power saving method, and a power saving program that detect and control whether a user is touching a part of the body with the electronic device with an inward camera. is there.
Another object of the present invention is to use the power of the display unit, the camera, and the codec for image transmission / reception when shifting to a use state in which a part of the body is applied to the receiver during use in the TV phone mode by the electronic device with the TV phone function. To provide an electronic device for turning off the supply, a power saving method, and a power saving program.
Another object of the present invention is to provide an electronic device, a power saving method, and a power saving program that normally generate power when a user presses an arbitrary button or a predetermined button.
Another object of the present invention is to provide an electronic device, a power saving method, and a power saving program that allow a user to set ON / OFF of a detection function.

  In the following, means for solving the problem will be described using the numbers used in [Best Mode for Carrying Out the Invention] in parentheses. These numbers are added to clarify the correspondence between the description of [Claims] and [Best Mode for Carrying Out the Invention]. However, these numbers should not be used to interpret the technical scope of the invention described in [Claims].

  The electronic device according to the present invention is in a state where a power supply unit (107) that supplies electric power to an electric circuit and the user is in contact with or approaching a part of the body while the user is using the electronic device. And detecting whether or not the user has applied a part of the body based on the detection result of the detection unit, and determining that the user has applied a part of the body, When a part is applied, the power supply from the power supply unit (107) to the electric circuit that does not require operation is stopped, and when it is determined that a part of the body is not applied, the power supply to the electric circuit And a control unit (101) that controls to supply power from the unit (107).

  In the electronic device of the present invention, the detection unit is a receiver (102) that outputs a sound wave while the user is using the electronic device and receives a reflected sound reflected from the user.

  In the electronic device of the present invention, the receiver (102) includes a speaker (301) that transmits and receives the sound wave and also functions as a microphone, and an amplifier (305) that amplifies an electric signal, When the reflected sound generated by reflecting the sound wave transmitted from the speaker (301) hits the speaker (301), the microphone function converts the reflected sound into the electric signal, and the control unit (101). Analyzes and processes the load of the amplifier (305) by the electrical signal to determine whether or not a part of the body is applied.

  In the electronic device of the present invention, the sound wave is a sound or an ultrasonic wave.

  In the electronic device of the present invention, the control unit (101) stops the detection function for detecting the reflected sound after stopping the power supply.

  The electronic device of the present invention includes a storage unit (106) that stores a value of an intermittent time indicating a certain time during which the control unit (101) stops the detection function. The control unit (101) activates the detection function after a lapse of the intermittent time.

  In the electronic device of the present invention, after the standby time due to the intermittent time has elapsed, the control unit (101) determines whether the silent state is in use. If the electronic device is determined not to be silent, the detection function is activated and the silent state is established. If it is determined, the activation of the detection function is stopped, and it waits again for the intermittent time.

  In the electronic device of the present invention, the sound wave transmission time is shorter than the reflected sound detection time.

  In the electronic device of the present invention, when the control unit (101) determines that the reflected sound is received within the reflected sound detection time, the control unit (101) processes the user as if he / she is hitting a part of the body, After the reflected sound detection time, regardless of whether the reflected sound is received or not, processing is performed assuming that no part of the body is applied to the receiving unit (102).

  In the electronic device of the present invention, the detection unit is a camera unit (602) that inputs the illuminance information of the environment where the user is present as the initial illuminance, and the illuminance information detected by the user while using the electronic device as the current illuminance. The control unit (601) obtains a threshold value for determining that the user is touching or approaching a part of the body from the initial illuminance, or is not touching or approaching, and the threshold value and the current illuminance. If the current illuminance is higher, it is determined that a part of the body is not touching or approaching. If the current illuminance is lower, it is determined that a part of the body is touching or approaching. To do.

  In the electronic device according to the present invention, the detection unit outputs a sound wave while the user is using the electronic device, and receives a reflected sound reflected by the user from the sound wave (1002A); The camera unit (1002B) that inputs the illuminance information of the environment in which the illuminance information is the initial illuminance, the illuminance information detected while the user is using the electronic device as the current illuminance, and the sensor unit (1002C) that senses the temperature or approach of a nearby object And some of them.

The electronic apparatus of the present invention includes an input unit (1005) having at least one button for the user to press.
When the user presses an arbitrary button or a predetermined button, the control unit (1001) controls the power supply unit (1007) to supply power to the electric circuit.

  The power saving method according to the present invention is based on the step of detecting that the user is in contact with or approaching a part of the body while the user is using the electronic device, and based on the detection result. When the user judges whether or not the user is touching or approaching a part of the body and judges that the user is touching or approaching a part of the body, Stopping the power supply to the electric circuit that does not need to be operated and supplying the electric circuit to the electric circuit when it is determined that a part of the body is not touching or approaching.

  In the power saving method of the present invention, the detection is to output a sound wave while the user is using the electronic device, and to receive a reflected sound reflected from the user.

  The power saving method of the present invention includes a step of transmitting and receiving the sound wave, a step of converting the reflected sound generated by reflecting the transmitted sound wave into the electric signal, and an amplifier based on the electric signal. Determining whether or not a part of the body is touching or approaching by analyzing and processing the load on the body.

  In the power saving method of the present invention, the sound wave is a sound or an ultrasonic wave.

  The power saving method of the present invention includes a step of stopping a detection function for detecting the reflected sound after the power supply is stopped.

  The power saving method of the present invention includes a step of storing a value of an intermittent time indicating a certain time during which the detection function is stopped, and a step of starting the detection function after the intermittent time has elapsed.

  In the power saving method of the present invention, after the standby time due to the intermittent time, it is determined whether it is a silent state in use, if it is determined that it is not a silent state, the detection function is activated, and if it is determined that it is a silent state, The activation of the detection function is stopped, and a step of waiting again for the intermittent time is provided.

  In the power saving method of the present invention, the sound wave transmission time is shorter than the reflected sound detection time.

  When it is determined that the reflected sound has been received within the reflected sound detection time, the power saving method according to the present invention treats the user as applying a part of the body, and after the reflected sound detection time, For example, regardless of whether or not the reflected sound is successfully received, a step is included in which it is assumed that a part of the body is not applied to the receiver (102).

  According to the power saving method of the present invention, the step of inputting the illuminance information of the environment where the user is present as the initial illuminance, the illuminance information detected by the user while using the electronic device as the current illuminance, and the user from the initial illuminance. Finds a threshold value for determining that a part of the body is in contact with or approaching, or is not in contact with or approaching, and compares the threshold value with the current illuminance, and if the current illuminance is higher, Determining that the body part is not in contact with or approaching, and determining that the body part is in contact with or approaching if the current illuminance is lower.

  According to the power saving method of the present invention, the user outputs a sound wave while the electronic device is being used, receives the reflected sound reflected from the user, and the illuminance information of the environment where the user is present. The step of inputting the illuminance and the illuminance information detected by the user while using the electronic device as the current illuminance and the step of sensing the temperature or the approach of a nearby object are used in combination.

  According to the power saving method of the present invention, when the user presses an arbitrary button or a predetermined button, the control unit (1001) supplies power from the power source unit (1007) to the electric circuit. The step of controlling.

  The power saving program of the present invention is based on the step of detecting that the user is in contact with or approaching a part of the body while the user is using the electronic device, and the result of the detection. When the user judges whether or not the user is touching or approaching a part of the body and judges that the user is touching or approaching a part of the body, Stopping the power supply to the electric circuit that does not need to be operated and supplying the electric circuit to the electric circuit when it is determined that a part of the body is not touching or approaching.

  In the power saving program of the present invention, the detection is to output a sound wave while the user is using the electronic device, and to receive a reflected sound reflected from the user.

  The power saving program of the present invention includes a step of transmitting and receiving the sound wave, a step of converting the reflected sound generated by reflecting the transmitted sound wave into the electric signal, and an amplifier based on the electric signal Determining whether or not a part of the body is touching or approaching by analyzing and processing the load on the body.

  In the power saving program of the present invention, the sound wave is a sound or an ultrasonic wave.

  The power saving program of the present invention comprises a step of stopping a detection function for detecting the reflected sound after stopping the power supply.

  The power saving program of the present invention includes a step of storing a value of an intermittent time indicating a certain time during which the detection function is stopped, and a step of starting the detection function after the intermittent time has elapsed.

  The power saving program of the present invention determines whether or not a silent state is in use after the standby time due to the intermittent time, and if it is determined that it is not a silent state, the detection function is activated, and if it is determined that it is a silent state, The activation of the detection function is stopped, and a step of waiting again for the intermittent time is provided.

  In the power saving program of the present invention, the sound wave transmission time is shorter than the reflected sound detection time.

  When it is determined that the reflected sound is received within the reflected sound detection time, the power saving program according to the present invention treats the user as applying a part of the body, and after the reflected sound detection time, For example, regardless of whether or not the reflected sound is successfully received, a step is included in which it is assumed that a part of the body is not applied to the receiver (102).

  The power saving program of the present invention includes a step of inputting illuminance information of an environment where the user is present as initial illuminance, and illuminance information detected by the user while using the electronic device as current illuminance, and from the initial illuminance to the user Finds a threshold value for determining that a part of the body is in contact with or approaching, or is not in contact with or approaching, and compares the threshold value with the current illuminance, and if the current illuminance is higher, Determining that the body part is not in contact with or approaching, and determining that the body part is in contact with or approaching if the current illuminance is lower.

  The power saving program of the present invention initially outputs a sound wave while the user is using the electronic device, receives the reflected sound reflected from the user, and illuminance information of the environment where the user is present. The step of inputting the illuminance and the illuminance information detected by the user while using the electronic device as the current illuminance and the step of sensing the temperature or the approach of a nearby object are used in combination.

  According to the power saving program of the present invention, when the user presses an arbitrary button or a predetermined button, the control unit (1001) supplies power from the power supply unit (1007) to the electric circuit. The step of controlling.

When used in an electronic device, the detection function determines whether or not the user has applied a part of the body to the electronic device. Power saving is realized by turning off the power supply.
When the power supply to the electrical circuit is turned off, the user can press any button or a predetermined button to supply power to the electrical circuit that does not require operation when the user is hitting a part of the body. By restarting the power supply, it is easy to restart the power supply.
In an electronic device equipped with the above-described detection function, the user can freely set ON / OFF of the detection function as to whether or not the user is touching a part of the body during use.
By appropriately combining the above detection functions, detection accuracy can be improved.
When using an electronic device with a TV phone function in the TV phone mode, when shifting to a general usage state where a part of the body is applied to the receiver, power consumption is achieved by turning off the display unit, camera, and image transmission / reception codec. Can be suppressed.

  Examples of the electronic device according to the present invention include communication devices such as mobile phones and cordless phone handsets, and sound reproducing devices such as portable MDs (minidiscs). However, actually, the present invention is not limited to these examples, and any electronic device that uses a part of the user's body in contact with or in close proximity may be used. Further, when the user places a part of the body on the electronic device, the user is not limited to the direct contact, and may be indirectly contacted from above the clothing, for example. Examples of body parts include the ears and hands. However, actually, it is not limited to these examples.

A first embodiment of the present invention will be described below with reference to the accompanying drawings.
Below, the case where it uses using a part of body after starting use with an electronic device is demonstrated.
First, a configuration diagram of the first embodiment will be described with reference to FIG.
The electronic apparatus according to the first embodiment includes a control unit 101, a reception unit 102, a display unit 103, a wireless unit 104, an input unit 105, and a storage unit 106.
The control unit 101 is connected to the reception unit 102, the display unit 103, the wireless unit 104, the input unit 105, and the storage unit 106.

The control unit 101 controls each unit of the electronic device and activates various functions.
The receiving unit 102 is a device that outputs sound waves, and a part of the user's body can be applied during use. It is also possible to receive sound. The sound wave here means an ultrasonic wave, a voice on the other party side, or a voice generated / reproduced by an electronic device.
The display unit 103 includes an LCD and a backlight, and displays characters or images on the screen.
The wireless unit 104 is a device that transmits and receives data by wireless communication. Note that the wireless unit 104 is not required when the electronic device is a sound reproducing device that does not perform communication such as portable MD (mini disc).
The input unit 105 is a device that accepts input related to commands and operations from the user.
The storage unit 106 is a storage device that stores programs and data.
The power supply unit 107 is mainly a battery and supplies power to an electric circuit. The power supply unit 107 includes a battery or a battery built in an electronic device or an electric circuit in addition to a detachable battery.

The operation of the first embodiment of the present invention will be described with reference to the flowchart of FIG.
The detection function is activated by an input operation of the user of the electronic device or by automatic control of the control unit 101 (step S201).
It is assumed that the above-described detection function is provided in the control unit 101 or the receiving unit 102.

The control unit 101 determines whether or not the user is touching a part of the body with the electronic device by using the activated detection function (step S202).
As a detection method, there are means for detecting and controlling the reflected sound of the ultrasonic wave output from the receiver 102, and means for detecting and controlling the reflected sound of the sound output from the receiver 102.
Actually, any one of the above or a combination of each of them may be used.

  If the control unit 101 determines that the user has placed a part of the body on the electronic device (step S203) based on the determination in (Step S202), the control unit 101 applies the part of the body to the electronic device. If it is determined that it is not, the process proceeds to step S206.

When the control unit 101 determines that the user has applied a part of the body to the electronic device based on the determination in (Step S202) above, the power to the electric circuit that does not require operation when the user is applying a part of the body. The power is saved by turning off the power supply from the unit 107 (step S203).
The operation-free electrical circuit described here is an electrical circuit for functions that do not need to be used during use, such as a main LCD and a backlight.

  After performing the detection and determination in the above (step S202), the detection function becomes unnecessary, so the control unit 101 turns off the detection function (step S204).

It waits for a certain period of time for the intermittent time value stored in advance in the storage unit (step S205).
The process proceeds after the standby time has elapsed (step S201).

When the control unit 101 determines that a part of the body is not applied according to the above determination (step S202), the control unit 101 generates normal power. (Step S206).
The normal power generation is to turn on the power supply from the power supply unit 107 to the electric circuit turned off due to power saving.

  After performing the detection and determination in the above (Step S202), the detection function becomes unnecessary, so the control unit 101 turns off the detection function (Step S207).

The control unit 101 determines whether it is in use (step S208).
If it is determined that it is in use, it waits for a certain period of time based on the intermittent time value stored in advance in the storage unit (step S209).

  If it is in use according to the above determination (step S208), the process proceeds to the processing after the standby time has elapsed (step S201).

With reference to FIG. 3, the configuration around the receiver in the first embodiment will be described.
The reception unit 102 includes a speaker 301, a mixer 302, a high-pass filter 303, a low-pass filter 304, an amplifier 305, an amplifier 306, an amplifier 307, an reception control unit 308, and a timer 309.
Note that the receiving unit 102 may include only the speaker 301, and each unit other than the speaker 301 may be included in the control unit 101.

The speaker 301 is connected to the mixer 302 and the high pass filter 303.
The mixer 302 is connected to the low pass filter 304 and the amplifier 306.
The high pass filter 303 is connected to the amplifier 305.
The low pass filter 304 is connected to the amplifier 307.
The amplifier 305, the amplifier 306, and the amplifier 307 are connected to the reception control unit 308.
The reception control unit 308 is connected to the timer 309.

The speaker 301 is a device that outputs sound and ultrasonic waves. The basic principle of both the speaker and the microphone is “electromagnetic induction”, and the structure of the speaker and the microphone is basically the same. Therefore, the speaker 301 can receive sound. Can be converted to a signal.
In addition, the time value which can be expected as the time until the ultrasonic wave emitted from the speaker 301 hits the user and bounces is defined as the reflected sound detection time.
The mixer 302 is a circuit that mixes a plurality of signals. Here, an electrical signal of sound and an electrical signal including an ultrasonic component are mixed.
The high-pass filter 303 is a filter that allows high sounds to pass therethrough. In other words, the high-pass filter 303 is a low-cut filter. Here, components other than the ultrasonic component are removed from the received electrical signal. Note that the received electrical signal is a signal obtained by converting the electrical signal mixed by the mixer 302 and returning the reflected sound to the sound or ultrasonic wave emitted from the speaker 301 into the electrical signal again. .
The low-pass filter 304 is a filter that performs the reverse function of the high-pass filter 303. Here, the ultrasonic component is removed from the amplified electric signal of the sound.
The amplifier 305, the amplifier 306, and the amplifier 307 are amplifiers that amplify an output signal of sound or sound.
The reception control unit 308 receives and outputs a voice electrical signal and an electrical signal including an ultrasonic component. Note that the control unit 101 may be used as the reception control unit 308.
The reflected sound detection time is set by the reception control unit 308 and the timer 309 detects the passage of the reflected sound detection time.

A method of detecting whether or not a part of the body is applied to the reception unit 102 will be described with reference to FIG.
Each unit other than the speaker 301 can be configured by using the configuration of the existing control unit 101.

The reception control unit 308 outputs an electrical signal of an ultrasonic component that cannot be heard by the human ear for a very short time, and is amplified by the amplifier 306.
Hereinafter, this extremely short time is referred to as an ultrasonic transmission time.

  Next, the time value that can be expected as the time until the ultrasonic wave emitted from the speaker hits the user and bounces back when using a part of the body is set as the reflected sound detection time.

  If the distance between the receiver 102 and a part of the user's body is within 1 cm, the reflected sound detection time is 60 μs (microseconds) or less. In order to prevent the ultrasonic wave transmitted from the receiver 102 from being mixed with the reflected ultrasonic wave, the ultrasonic wave transmission time needs to be shorter than the reflected sound detection time.

  An audio electrical signal is output from the reception control unit 308 and amplified by the amplifier 307, but the ultrasonic component is cut by the low-pass filter 304.

  The mixer 302 mixes the electrical signal including the ultrasonic component and the electrical signal of the sound and converts the sound into sound by the speaker 301. The reflected sound is converted again into the electrical signal by the speaker 301, and the reflected sound is converted into the high-pass filter 303. The electrical signal is output.

  The electrical signal obtained by converting the reflected sound is cut by the high-pass filter 303 except for the ultrasonic component, amplified by the amplifier 305, and output to the reception control unit 308.

  When the reception control unit 308 receives the electrical signal including the ultrasonic component, the reception control unit 308 sets the reflected sound detection time in the timer 309.

  When the reflected sound detection time has elapsed, the timer 309 outputs a signal to the reception control unit 308 to end detection of the reflected sound. Thereby, even if a reflected sound is received after the reflected sound detection time is over, this can be ignored.

  When the sound output from the speaker 301 is reflected and the speaker 301 receives it, the reflected sound is converted into an electric signal and output to the high-pass filter 303.

  The electric signal cut by the high-pass filter 303 other than the ultrasonic component is amplified by the amplifier 305 and output to the reception control unit 308. Here, if it is within the reflected sound detection time, the reception control unit 308 processes that a part of the body is applied to the reception unit, and does not perform processing after the reflected sound detection time.

  Further, although the low-pass filter 304 is used in FIG. 3, it can be omitted if the electric signal output from the reception control unit 308 to the amplifier 307 does not include an ultrasonic component.

  Further, since the amplifier is an amplifier, the amplifier 305, the amplifier 306, and the amplifier 307 are not necessary as long as the reception control unit 308 can detect the reflected sound without amplifying the electric signal.

Here, the detection method performed by the ultrasonic wave output from the reception unit 102 hitting the user and reflected by the ultrasonic wave is reflected by the speaker 301 itself and applied to a part of the body. It does not use existing sensors. In other words, this mechanism is unique.
Moreover, although the control part 101 needs the structure for sending out an ultrasonic wave, there exists an advantage that cost is cheap compared with the case where the existing sensor is used.

Similarly, the detection method performed by using the reflected sound as the sound output from the receiving unit 102 hits the user is whether the reflected sound of the sound transmitted from the speaker 301 is received by the speaker 301 itself and whether a part of the body is applied. The existing sensors are not used. In other words, this mechanism is unique.
In addition, there is an advantage that it is not necessary to add a new part or configuration and the cost can be reduced.

Details of the detection operation will be described with reference to FIG.
The vertical axis represents voltage, and the horizontal axis represents time.
An electrical signal generated when an ultrasonic wave is output from the speaker is indicated by 401.
Reference numeral 402 denotes an ultrasonic signal converted into an electric signal by a speaker.
The waveform 402 gets closer to the waveform 401 and becomes larger as the reflected sound comes earlier.
As the reflected sound comes later, the waveform 402 becomes farther away from the waveform 401 and becomes smaller.
A time difference between the peak values of the electrical signals of the ultrasonic transmission sound and the reflected sound is indicated by 403.
If the time difference 403 between the peak values of the transmitted sound of the ultrasonic wave and the electric signal of the reflected sound is within the reflected sound detection time, it is determined that a part of the body is applied to the receiver.

A second embodiment will be described below.
This embodiment differs from the first embodiment in that the configuration around the receiving unit is that shown in FIG. 5 and that the control unit 101 determines whether there is a silent state after waiting for a predetermined time. The other parts are the same.

A configuration around the receiver in the second embodiment will be described.
The reception unit 102 includes a speaker 501, an amplifier 502, an reception control unit 503, and a timer 504.
Note that the receiving unit 102 may include only the speaker 501, and each unit other than the speaker 501 may be included in the control unit 101.

The speaker 501 is connected to the amplifier 502.
The amplifier 502 is connected to the reception control unit 503.
The reception control unit 503 is connected to the timer 504.

All of the components other than the speaker 501 have the existing configuration of the control unit 101.
The audio electrical signal output from the reception control unit 503 is amplified by the amplifier 502, converted to audio by the speaker 501, and output.

The output sound is reflected and received by the speaker 501, whereby the reflected sound is converted into an electric signal and output to the amplifier 502.
Here, the reason why the reflected sound is converted into an electric signal is that the structure of the speaker 501 and the microphone is basically the same, so that when the sound transmitted from the speaker 501 is reflected and hits the speaker 501, the function as a microphone is achieved. This is because an electric signal is generated by the above.

  Since this electric signal becomes a counter electromotive force for the amplifier 502, it is applied as an extra load for the amplifier 502.

  The reception control unit 503 analyzes and processes this extra load to detect the back electromotive force, recognizes that the reflected sound has arrived, and determines whether or not a part of the body is applied to the electronic device.

  If the reception control unit 503 determines that the reflected sound of the sound transmitted from the speaker 501 has been received within the reflected sound detection time, the reception control unit 503 processes that the user is hitting a part of the body against the reception unit 102, and reflects the reflection. After the sound detection time, processing is performed assuming that a part of the body is not applied to the receiver, regardless of whether the reflected sound is received successfully.

  The detection function is activated intermittently. After waiting for the intermittent time, the control unit determines whether the silent state is in use. If it is determined that the sound is not silent, the detection function is activated. If it is determined that the sound is silent, the detection function is stopped and waits for an intermittent time again.

Referring to the flowchart of FIG. 2, the process of shifting to the detection function ON (step S201) after waiting for a fixed time (step S205) is different from the process of waiting for a fixed time (step S205) again.
As a result, the detection function is not activated in the silent state in use, and the state is maintained regardless of whether the state is power saving or normal power saving.

Note that the detection function can be controlled in a silent state during use other than the above method.
For example, as a processing method in a silent state, a method of waiting for a sound or a method of temporarily shortening the intermittent time can be considered.

  Further, instead of intermittently depending on the time, if it is determined to start when there is a sound, it may wait for a sound again after a certain time.

A third embodiment will be described below.
The first embodiment is different from the first embodiment only in that a camera is used for the detection function and preprocessing is performed immediately after the start of use.

The configuration diagram of the third embodiment will be described with reference to FIG.
The electronic apparatus according to the third embodiment includes a control unit 601, a camera unit 602, a display unit 603, a wireless unit 604, an input unit 605, and a storage unit 606.
The control unit 601 is connected to the camera unit 602, the display unit 603, the wireless unit 604, the input unit 605, and the storage unit 606.

The control unit 601 controls each unit of the electronic device and activates various functions.
Here, the camera unit 602 is a digital camera built in the electronic apparatus. A digital camera is a device that converts a video image into an electrical signal by using a semiconductor element that reacts to light, such as a CCD or CMOS, and stores it as a digital data in a storage medium such as a flash memory. Simply put, the part corresponding to the camera film is replaced with an electronic sensor and flash memory. However, the digital camera is an example, and actually, the camera unit 602 is not limited to the digital camera.
A display unit 603 includes an LCD and a backlight, and displays characters or images on the screen.
A wireless unit 604 is a device that transmits and receives data by wireless communication. In the case where the electronic device is a sound reproducing device that does not perform communication such as portable MD (mini disc), the wireless unit 604 is unnecessary.
The input unit 605 is a device that receives an input related to a command or operation from a user.
The storage unit 606 is a storage device that stores programs and data.
The power supply unit 607 is mainly a battery and supplies power to an electric circuit. Note that the power supply unit 607 includes, in addition to a detachable battery, a battery or a battery built in an electronic device or an electric circuit.

The camera unit 602 is a camera unit 602 that faces a part of the body when in use. (Hereinafter referred to as the inward camera unit 602)
The pre-processing performed at the start of use is shown below. In FIG. 2, immediately after the start of use, pre-processing is performed, and then the process proceeds to the detection function (step S201).

When using the electronic apparatus, the user inputs an instruction to start use while viewing the display unit 603.
When an input is made for transmission, the camera 602 is activated, and the camera 602 detects the illuminance of the environment where the user is present and stores it in the storage unit 606. This illuminance is called “initial illuminance”.
On the other hand, the illuminance detected by the camera 602 while the user is using the electronic device with a part of his / her body on the electronic device is referred to as “current illuminance”.

The operation of the third embodiment of the present invention will be described with reference to the flowchart of FIG.
When the control unit 601 shifts to use, the control unit 601 turns on the camera unit 602 (step S701).
The control unit 601 stores the illuminance information input by the camera unit 602 in the storage unit 606 as initial illuminance (step S702).
The control unit 601 obtains a threshold value for determining whether a part of the body is applied to the electronic device from the initial illuminance. Hereinafter, this threshold value is set as a threshold value 1 (step S703).
The control unit 601 obtains a threshold value for determining whether the electronic device is separated from a part of the body. This threshold value is a threshold value 1 considering hysteresis. Hereinafter, this threshold value is set as a threshold value 2 (step S704). Hysteresis is a characteristic of a device or apparatus in which an output value corresponding to an input value differs depending on a past history of applied input values.
The control unit 601 turns off the camera unit 602 (step S705).

The method for determining whether or not a part of the body is hit is shown below.
The control unit 601 obtains illuminance from information input by the camera unit 602. This illuminance is stored in the storage unit 606 as the current illuminance.
Here, when the electronic device is in the normal power state, the control unit 601 compares the threshold value 1 with the current illuminance. If the current illuminance is higher, the control unit 601 maintains the normal power state, and if the current illuminance is lower, Shift to power saving mode.
The normal power state is a state in which power supply from the power supply unit 607 to an electric circuit turned off due to power saving is turned on.
The power saving state is a state in which when the user places a part of his / her body on the electronic device, the power supply from the power supply unit 607 to the electric circuit that does not require operation in that state is turned off.

  When the electronic device is in the power saving state, the control unit 601 compares the threshold value 2 with the current illuminance. If the current illuminance is higher, the control unit 601 shifts to the normal power state. If the current illuminance is lower, the control unit 601 To maintain.

  In general, a user of an electronic device performs transmission and response operations on a display unit, and after the operation is completed, places a part of the body on the electronic device. The initial illuminance is obtained when the user performs a transmission or response operation. On the other hand, when the user places a part of the body on the electronic device, the lens of the inward camera unit 602 and the user who is the subject approach, so the illuminance of the information input by the camera unit 602 is the initial illuminance. Compared to lower.

  In the threshold 1, the illuminance when a part of the body is applied to the electronic device is set. From the above, the threshold value 1 is set lower than the initial illuminance.

The threshold value 2 has a hysteresis characteristic by adding a little illuminance value to the threshold value 1.
As described above, the threshold values 1 and 2 are set lower than the initial illuminance, but the threshold value 2 is set higher than the threshold value 1.

The following conditions can be taken into consideration for threshold determination.
FIG. 8 shows the tendency of outdoor illuminance displacement in fine weather.
The vertical axis indicates the illuminance, the horizontal axis indicates the time zone, 801 indicates the illuminance displacement tendency of the environment where the user is present, and 802 indicates the illuminance displacement tendency when a part of the body is applied to the electronic device.
The illuminance difference between 801 and 802 is higher in the daytime and lower in the middle of the night.

If the control unit 601 determines that the initial illuminance is high at the start of use, the control unit 601 sets the threshold value 1 to a value significantly lower than the initial illuminance.
The threshold 2 is obtained by adding a little illuminance to the threshold 1, but the higher the initial illuminance, the higher the added illuminance.

Conversely, if it is determined that the initial illuminance is low, the threshold 1 is set to a value that is smaller than the initial illuminance.
The threshold 2 is obtained by adding a little illuminance to the threshold 1, but the lower the initial illuminance, the lower the added illuminance.

  Furthermore, it can be configured to observe the long-term displacement of the current illuminance and correct the threshold value.

Moreover, the following detection method is shown as a detection method different from the above.
When a part of the body is applied to the electronic device, the lens of the camera unit 602 facing inward and the user who is the subject approach, the lens is not focused, and the image input from the camera unit 602 is blurred. The control unit determines that the user is placing a part of the body on the electronic device based on the degree of blurring of the image input from the camera unit 602.

With reference to FIG. 9, the block diagram of 4th, 5th, 6th embodiment is demonstrated.
The electronic devices of the fourth, fifth, and sixth embodiments include a control unit 901, a sensor unit 902, a display unit 903, a wireless unit 904, an input unit 905, and a storage unit 906.
The control unit 901 is connected to the sensor unit 902, the display unit 903, the wireless unit 904, the input unit 905, and the storage unit 906.

The control unit 901 controls each unit of the electronic device and activates various functions.
The sensor unit 902 is a contact switch, a temperature sensor, or a proximity sensor. Different detection functions are used depending on the embodiment. The contact switch is a switch that is turned on when a part of the body is applied to the electronic device. The temperature sensor is a sensor that detects a change in temperature of the sensor unit or its surroundings. The proximity sensor detects the proximity of an object and the presence or absence of a nearby object without contact.
A display unit 903 includes an LCD and a backlight, and displays characters or images on the screen.
The wireless unit 904 is a device that transmits and receives data by wireless communication. Note that the wireless unit 904 is not necessary when the electronic device is a sound reproducing device that does not perform communication such as portable MD (mini disc).
The input unit 905 is a device that receives an input related to a command or operation from a user.
The storage unit 906 is a storage device that stores programs and data.
The power supply unit 907 is mainly a battery and supplies power to an electric circuit. Note that the power supply unit 907 includes, in addition to a detachable battery, a battery or a battery built in an electronic device or an electric circuit.

First, a fourth embodiment will be described.
The second embodiment is different from the second embodiment in that a contact switch is used as a detection function of the sensor unit 902. In the flowchart of FIG. 2, the detection function ON (step S201), the detection function OFF (step S204), and (step S207) are not required. The other parts are the same.
The contact switch is arranged at a position where it always turns on when a part of the body is applied to the electronic device.
During use, the control unit 901 determines whether or not a part of the body is applied to the electronic device only by looking at the state of the contact switch.

As another method, the control unit 901 can also determine an interrupt that absorbed chattering without looking at the state of the contact switch.
In this case, a push switch or a micro switch can be used as the contact switch.

A fifth embodiment will be described.
It differs from the first embodiment in that a temperature sensor is used as the detection function of the sensor unit 902, and the other parts are the same.
As the temperature sensor, a platinum resistance thermometer, a semiconductor resistance temperature sensor, a thermocouple sensor, or an IC temperature sensor can be used.

A sixth embodiment will be described.
It differs from the first embodiment in that a proximity sensor is used as the detection function of the sensor unit 902, and the other parts are the same.
As the proximity sensor, a capacitive proximity sensor can be used.

The above-described first to sixth embodiments can be appropriately combined.
An example of the combination and a configuration method of the determination method will be described as a seventh embodiment.

A configuration diagram of the seventh embodiment will be described with reference to FIG.
The electronic apparatus according to the seventh embodiment includes a control unit 1001, a receiver unit 1002A, a camera unit 1002B, a sensor unit 1002C, a display unit 1003, a wireless unit 1004, an input unit 1005, and a storage unit 1006. .
The control unit 1001 is connected to the receiving unit 1002A, the camera unit 1002B, the sensor unit 1002C, the display unit 1003, the wireless unit 1004, the input unit 1005, and the storage unit 1006.

A control unit 1001 controls each unit of the electronic device and activates various functions.
The receiving unit 1002A is a device that outputs sound waves, and a part of the user's body can be applied during use. It is also possible to receive sound. The sound wave here means an ultrasonic wave, a voice on the other party side, or a sound generated / reproduced by an electronic device.
Here, the camera unit 1002B is a digital camera built in the electronic apparatus. A digital camera is a device that converts a video image into an electrical signal by using a semiconductor element that reacts to light, such as a CCD or CMOS, and stores it as a digital data in a storage medium such as a flash memory. Simply put, the part corresponding to the camera film is replaced with an electronic sensor and flash memory. However, the digital camera is an example, and actually, the camera unit 1002B is not limited to the digital camera.
As the sensor unit 1002C, at least one of a contact switch, a temperature sensor, and a proximity sensor is used. The contact switch is a switch that is turned on when a part of the body is applied to the electronic device. The temperature sensor is a sensor that detects a change in temperature of the sensor unit or its surroundings. The proximity sensor detects the proximity of an object and the presence or absence of a nearby object without contact.
A display unit 1003 includes an LCD and a backlight, and performs screen display of characters or images.
The wireless unit 1004 is a device that transmits and receives data by wireless communication. Note that if the electronic device is a sound reproduction device that does not perform communication such as portable MD (mini disc), the wireless unit 1004 is unnecessary.
The input unit 1005 is a device that receives an input related to a command or operation from a user.
The storage unit 1006 is a storage device that stores programs and data.
The power supply unit 1007 is mainly a battery and supplies power to an electric circuit. Note that the power supply unit 1007 includes, in addition to a detachable battery, a battery or a battery built in an electronic device or an electric circuit.

  In the seventh embodiment, the detection function based on the reflected sound of the ultrasonic wave by the receiver 1002A according to the first embodiment, the detection function by the camera unit 1002B according to the third embodiment, and the contact according to the fourth embodiment. It comprises a detection function by a switch (sensor unit 1002C), and is determined as follows. Note that the reception unit 102 and the contact switch (sensor unit 1002C) may be integrated. The flowchart is the same as in the first embodiment.

  When detecting whether a part of the body is applied to the electronic device, the order in which the three detection functions are activated is appropriately selected depending on the configuration of each electronic device.

  The control unit 101 may configure a power saving method by selecting from the following three determination methods based on the above three detection functions.

  As one of the determination methods, when it is determined that all the three detection functions apply a part of the body to the electronic device, power is saved.

  As another determination method, when any two of the above three detection functions determine that a part of the body is applied to the electronic device, power is saved.

  As another determination method, when any one of the above three detection functions determines that a part of the body is applied to the electronic device, power is saved.

  In addition, the determination method when the electronic device is separated from the body part during use is also selected from the above three determination methods, and the power saving method is configured. Also good.

  In addition to those shown in the seventh embodiment, the first to sixth embodiments described above can be combined.

The eighth embodiment will be described here with reference to FIG.
As an eighth embodiment, when the electronic device with a TV phone function is being used in the TV phone mode, when shifting to a use state in which a part of the body is applied to the receiver 1002A, not only the display unit 1003 but also the camera unit 1002B, Power consumption is reduced by turning off the power supply of the codec for image transmission / reception.
The detection of whether or not a part of the body is applied comprises the detection function used in the first to seventh embodiments.

Regarding the eighth embodiment, the first embodiment is different from the first embodiment in that in step S203 in the flowchart of FIG. 2, the power supply of the camera unit 1002B and the image transmission / reception codec is turned off together with the display unit 1003. This is the same except that the power supply of the camera unit 1002B and the image transmission / reception codec is turned on together with the unit 1003.
However, only the third embodiment is different because the camera unit is used as a detection function.

As an ninth embodiment, in an electronic device equipped with the detection functions of the first to seventh embodiments, the user can press any button or a predetermined button during use to save power. The power supply from the power supply unit to the electrical circuit thus made can be turned on.
During use, the user presses an arbitrary button or a predetermined button.
Power supply to the display unit of the electronic device is turned on.

  In an electronic device equipped with the detection functions of the first to seventh embodiments and the functions of the eighth and ninth embodiments, the tenth embodiment allows the user to set the detection function ON / OFF. Form.

  FIG. 11 shows whether or not the display unit is displayed during use in an electronic device equipped with the detection functions of the first to seventh embodiments and the functions of the eighth and ninth embodiments. It is an image figure of a screen.

  Also, an electronic device equipped with the detection function of the first to seventh embodiments and the function of the eighth embodiment, the detection function of the first to seventh embodiments, and the function of the ninth embodiment are installed. The function of the tenth embodiment can also be mounted on the electronic device.

FIG. 1 is a block diagram showing the configuration of the first and second embodiments of the present invention. FIG. 2 is a flowchart showing the basic operation of the present invention. FIG. 3 is a block diagram showing a first configuration of the receiver. FIG. 4 is a diagram showing details of the detection operation. FIG. 5 is a block diagram showing a second configuration of the receiver. FIG. 6 is a block diagram showing the configuration of the third exemplary embodiment of the present invention. FIG. 7 is a diagram showing a flowchart of the operation of the third embodiment of the present invention. FIG. 8 is a diagram showing the displacement of the illuminance outdoors in fine weather. FIG. 9 is a block diagram showing the configuration of the fourth, fifth and sixth embodiments of the present invention. FIG. 10 is a block diagram showing the configuration of the seventh and eighth embodiments of the present invention. FIG. 11 is a diagram illustrating a setting screen for a display screen in use.

Explanation of symbols

DESCRIPTION OF SYMBOLS 101 ... Control part 102 ... Reception part 103 ... Display part 104 ... Radio | wireless part 105 ... Input part 106 ... Memory | storage part 107 ... Power supply part 301 ... Speaker 302 ... Mixer 303 ... High pass filter 304 ... Low pass filter 305 ... Amplifier 306 ... Amplifier 307 ... Amplifier 308 ... Reception control unit 309 ... Timer 401 ... Ultrasound waveform 402 ... Ultrasound reflected sound waveform 403 ... Time difference between peak values of waveform 501 ... Speaker 502 ... Amplifier 503 ... Reception control unit 504 ... Timer 601 ... Control 602 ... Camera unit 603 ... Display unit 604 ... Wireless unit 605 ... Input unit 606 ... Storage unit 607 ... Power supply unit 801 ... Displacement tendency of illuminance in environment where user is present 802 ... Illuminance when part of body is applied 901 ... Control unit 902 ... Sensor unit 903 Display unit 904 ... Wireless unit 905 ... Input unit 906 ... Storage unit 907 ... Power supply unit 1001 ... Control unit 1002A ... Reception unit 1002B ... Camera unit 1002C ... Sensor unit 1003 ... Display unit 1004 ... Radio unit 1005 ... Input unit 1006 ... Storage unit 1007 ... Power supply

Claims (36)

A power supply for supplying power to the electrical circuit;
A detection unit for detecting that the user is in contact with or approaching a part of the body while the user is using the electronic device;
Based on the detection result of the detection unit, it is determined whether or not the user is in contact with or approaching a part of the body. If the power supply from the power supply unit to the electric circuit that does not require operation is stopped when it is in contact or approaching, and it is determined that a part of the body is not in contact or approaching, the power supply to the electric circuit An electronic apparatus comprising: a control unit that controls to supply power from the unit. The electronic device according to claim 1,
The detection unit is an electronic device that is a receiving unit that outputs a sound wave while the user is using the electronic device and receives a reflected sound reflected from the user. The electronic device according to claim 2.
The receiver is
A speaker that transmits and receives the sound wave and also functions as a microphone;
An amplifier for amplifying an electrical signal;
Comprising
When the reflected sound generated by reflecting the sound wave transmitted from the speaker hits the speaker, the reflected sound is converted into the electric signal by the microphone function,
The control unit is an electronic device that determines whether or not a body part is in contact with or approaching by analyzing and processing a load of the amplifier by the electrical signal. The electronic device according to claim 2 or 3,
The electronic device is a sound or an ultrasonic wave. The electronic device according to any one of claims 2 to 4,
The electronic device stops the detection function for detecting the reflected sound after stopping the power supply. The electronic device according to claim 5.
A storage unit for storing a value of an intermittent time indicating a predetermined time during which the control unit stops the detection function;
The detection function waits for the value of the intermittent time, and after the intermittent time has elapsed, the control unit activates the detection function. The electronic device according to claim 6.
After the standby time due to the intermittent time, the control unit determines whether it is in a silent state in use, and if it is determined not to be a silent state, the detection function is activated, and if it is determined to be a silent state, the detection function is activated. An electronic device that stops and waits for the intermittent time again. The electronic device according to any one of claims 2 to 7,
An electronic apparatus in which the sound wave transmission time is shorter than the reflected sound detection time. The electronic device according to claim 8.
When it is determined that the reflected sound is received within the reflected sound detection time, the control unit treats the user as touching or approaching a part of the body, and after the reflected sound detection time, An electronic device that treats a part of the body as not contacting or approaching the receiving unit regardless of whether the reflected sound is received or not. The electronic device according to claim 1,
The detection unit is a camera unit that inputs illuminance information of an environment where the user is present as initial illuminance, and illuminance information detected by the user while using the electronic device as current illuminance,
The control unit obtains a threshold for determining that the user is touching or approaching a part of the body or not touching or approaching from the initial illuminance, and compares the threshold with the current illuminance. An electronic device that determines that a part of the body is not touching or approaching if the current illuminance is higher, and that a part of the body is contacting or approaching if the current illuminance is lower. The electronic device according to claim 1,
The detector is
A receiver that outputs a sound wave while the user is using the electronic device, and receives a reflected sound reflected from the user;
A camera unit that inputs the illuminance information of the environment where the user is present as the initial illuminance, and the illuminance information detected by the user while using the electronic device as the current illuminance;
An electronic device that is a combination of some of a sensor unit that senses the temperature or approach of a nearby object. The electronic device according to any one of claims 1 to 11,
Comprising an input unit having at least one button for the user to press;
An electronic device that controls the control unit to supply power from the power supply unit to the electric circuit when the user presses an arbitrary button or a predetermined button. Detecting that the user is touching or approaching a part of the body while the user is using the electronic device;
Based on the detection result, it is determined whether or not the user is touching or approaching a body part. If it is determined that the user is touching or approaching a body part, Stopping the power supply to the electrical circuit that does not require operation when it is approaching, and supplying the power to the electrical circuit when it is determined that the body part is not in contact with or approaching Power saving method. The power saving method according to claim 13,
The detection is a power saving method in which the user outputs a sound wave while the user is using the electronic device, and receives the reflected sound reflected from the user. The power saving method according to claim 14,
Sending and receiving the sound wave; and
Converting the reflected sound generated by reflecting the transmitted sound wave into the electrical signal;
Determining whether or not a part of the body is in contact with or approaching by analyzing and processing a load on the amplifier due to the electrical signal. The power saving method according to claim 14 or 15,
The power saving method, wherein the sound wave is a sound or an ultrasonic wave. The power saving method according to any one of claims 14 to 16,
A power saving method comprising a step of stopping a detection function for detecting the reflected sound after stopping the power supply. The power saving method according to claim 17,
Storing a value of intermittent time indicating a certain time during which the detection function is stopped;
And a step of activating the detection function after elapse of the intermittent time. The power saving method according to claim 18, wherein
After the standby time due to the intermittent time, it is determined whether it is in a silent state in use, and if it is determined that it is not in a silent state, the detection function is activated, and if it is determined that it is in a silent state, the activation of the detection function is stopped, and again A power saving method comprising a step of waiting for the intermittent time. The power saving method according to any one of claims 14 to 19,
The method of saving power, wherein the sound wave transmission time is shorter than the reflected sound detection time. The power saving method according to claim 20,
If it is determined that the reflected sound has been received within the reflected sound detection time, the user treats that part of the body is touching or approaching, and after the reflected sound detection time, the reflected sound is detected. Regardless of success or failure of reception, there is provided a power saving method comprising a step of processing that a part of the body is not in contact with or approaching the receiver. The power saving method according to claim 13,
The step of inputting the illuminance information of the environment where the user is present as the initial illuminance, and the illuminance information detected by the user while using the electronic device as the current illuminance,
From the initial illuminance, a threshold for determining that the user is touching or approaching a part of the body or not touching or approaching is obtained, the threshold is compared with the current illuminance, and the current illuminance is If it is high, it is determined that a part of the body is not touching or approaching, and if the current illuminance is lower, it is determined that a part of the body is touching or approaching. Method. The power saving method according to claim 13,
Outputting sound waves while the user is using the electronic device, and receiving the reflected sound reflected by the sound waves from the user;
The step of inputting the illuminance information of the environment where the user is present as the initial illuminance, and the illuminance information detected by the user while using the electronic device as the current illuminance,
A power saving method using a combination of some of the steps of sensing the temperature or approach of a nearby object. The power saving method according to any one of claims 13 to 23,
A power saving method comprising a step of controlling a control unit to supply power from a power supply unit to the electric circuit when a user presses an arbitrary button or a predetermined button. Detecting that the user is touching or approaching a part of the body while the user is using the electronic device;
Based on the detection result, it is determined whether or not the user is touching or approaching a body part. If it is determined that the user is touching or approaching a body part, Stopping the power supply to the electrical circuit that does not require operation when it is approaching, and supplying the power to the electrical circuit when it is determined that the body part is not in contact with or approaching Power saving program. In the power saving program according to claim 25,
The detection is a power saving program in which the user outputs a sound wave while the user is using the electronic device, and receives the reflected sound reflected from the user. In the power saving program according to claim 26,
Sending and receiving the sound wave; and
Converting the reflected sound generated by reflecting the transmitted sound wave into the electrical signal;
And determining whether or not a part of the body is in contact with or approaching by analyzing and processing a load on the amplifier by the electric signal. In the power saving program according to claim 26 or 27,
The power saving program in which the sound wave is a sound or an ultrasonic wave. In the power saving program according to any one of claims 26 to 28,
A power saving program comprising a step of stopping a detection function for detecting the reflected sound after the power supply is stopped. The power saving program according to claim 29,
Storing a value of intermittent time indicating a certain time during which the detection function is stopped;
And a step of activating the detection function after elapse of the intermittent time. In the power saving program according to claim 30,
After the standby time due to the intermittent time, it is determined whether it is in a silent state in use, and if it is determined that it is not in a silent state, the detection function is activated, and if it is determined that it is in a silent state, the activation of the detection function is stopped, and again A power saving program comprising a step of waiting for the intermittent time. The power saving program according to any one of claims 26 to 31,
A power saving program in which the transmission time of the sound wave is shorter than the detection time of the reflected sound. In the power saving program according to claim 32,
If it is determined that the reflected sound has been received within the reflected sound detection time, the user treats that part of the body is touching or approaching, and after the reflected sound detection time, the reflected sound is detected. A power saving program comprising a step of processing as if a part of the body is not in contact with or approaching the receiving unit regardless of whether or not the reception is successful. In the power saving program according to claim 25,
The step of inputting the illuminance information of the environment where the user is present as the initial illuminance, and the illuminance information detected by the user while using the electronic device as the current illuminance,
From the initial illuminance, a threshold for determining that the user is touching or approaching a part of the body or not touching or approaching is obtained, the threshold is compared with the current illuminance, and the current illuminance is If it is high, it is determined that a part of the body is not touching or approaching, and if the current illuminance is lower, it is determined that a part of the body is touching or approaching. program. In the power saving program according to claim 25,
Outputting sound waves while the user is using the electronic device, and receiving the reflected sound reflected by the sound waves from the user;
The step of inputting the illuminance information of the environment where the user is present as the initial illuminance, and the illuminance information detected by the user while using the electronic device as the current illuminance,
A power-saving program that is used in combination with some of the steps of sensing the temperature or approach of a nearby object. The power saving program according to any one of claims 25 to 35,
A power saving program comprising a step of controlling a control unit to supply power from a power supply unit to the electric circuit when a user presses an arbitrary button or a predetermined button.

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