JP2003037651A - Automatic volume control for telephone set - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic volume control for a telephone set with which the sound volume is automatically controlled in a receiver. SOLUTION: This device is composed of a pressure sensor 4 for measuring a pressure when pressing the ear onto a receiver 6, a distance sensor 5 for measuring the distance between the receiver 6 and the ear when the ear is separated from the receiver 6, and a volume control means 27 for controlling the received sound volume of the receiver 6 on the basis of pressure data measured by the pressure sensor 4 and the distance data measured by the distance sensor 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic volume adjusting device for a telephone, and more particularly to an automatic volume adjusting device for a telephone which automatically controls a listening volume.

[0002]

2. Description of the Related Art When using a mobile phone, it is inevitable to use it in a noisy environment. Therefore, the conventional mobile phone has a function of adjusting the volume. However, adjusting the volume during a call is cumbersome, and there are drawbacks in that the call is often interrupted due to a mistake in pressing a button or the like.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to improve the above-mentioned drawbacks of the prior art, and particularly to provide a pressure sensor and a distance sensor in the earpiece, and keep the earpiece away when the volume of the earpiece is high. In addition, when the listening volume is low, the volume of the handset is automatically controlled according to the human's natural movement of trying to press the earpiece against the ear, which enables a comfortable call. The present invention provides a novel telephone automatic volume control device.

[0004]

In order to achieve the above-mentioned object, the present invention basically adopts the technical constitution as described below.

That is, the first aspect of the automatic volume control device for a telephone according to the present invention is a pressure sensor for measuring the pressure when the ear is pressed against the handset, and the handset and the inter-ear when the ear is moved away from the handset. A distance sensor for measuring the distance, and volume control means for controlling the reception volume of the handset based on the pressure data measured by the pressure sensor and the distance data measured by the distance sensor. In the second aspect, when the pressure sensor detects a pressure equal to or higher than a preset initial value, the volume control means sets the difference between the pressure measured by the pressure sensor and the initial value. When the distance sensor detects a distance equal to or greater than a preset initial value, the volume control means measures the distance sensor. The reception volume is controlled so that the volume decreases according to the difference between the separation and the initial value. The third mode is the distance measured by the distance sensor and the initial value. And a frequency characteristic control means for controlling the frequency characteristic of the handset in accordance with the difference between the distance and the initial value for the pressure detection and the distance detection. It is characterized in that an initial value setting means for setting the respective initial values of is provided.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION An automatic volume control device for a telephone according to the present invention is a pressure sensor for measuring pressure when pressing an ear to a receiver, and a distance between the receiver and the ear when the ear is moved away from the receiver. And a sound volume control means for controlling the reception sound volume of the handset based on the pressure data measured by the pressure sensor and the distance data measured by the distance sensor. Is.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A specific example of an automatic volume control device for a telephone according to the present invention will be described in detail below with reference to the drawings. (First embodiment) FIG. 1 is a diagram showing the structure of a telephone according to the present invention, FIG. 2 is a block diagram showing the configuration of an automatic volume control device of the present invention, and FIGS. 3 is a flowchart for explaining the operation of the automatic volume control device, and in these figures, a pressure sensor 4 for measuring the pressure when pressing the ear to the handset 6 and the handset 6 when the ear is moved away from the handset 6. A distance sensor 5 for measuring the distance between the ear and a volume control means 27 for controlling the reception volume of the handset 6 based on the pressure data measured by the pressure sensor 4 and the distance data measured by the distance sensor 5. And an automatic volume adjusting device for a telephone set, wherein when the pressure sensor 4 detects a pressure equal to or higher than a preset initial value, the volume control means 27 causes the pressure sensor to detect the pressure. 4 is measured When the distance sensor 5 detects a distance equal to or greater than a preset initial value, the sound volume control means 27 controls the volume of the received sound so that the volume increases according to the difference between the pressure and the initial value. An automatic volume adjusting device for a telephone is shown, which controls the receiving volume so that the volume is reduced according to the difference between the distance measured by the distance sensor 5 and the initial value. An automatic volume adjusting device for a telephone is shown, which is provided with initial value setting means (step 4) for setting an initial value for detection and an initial value for distance detection.

The first embodiment of the present invention will be described in more detail below.

FIG. 1 is an exploded perspective view of a mobile phone.

In FIG. 1, 1 is a front case of a mobile phone, 2 is a rear case that is combined with the front case 1, and 3 is stored in a case composed of a front case 1 and a rear case 2. The device substrate 4 is provided on the device substrate 3 or the front housing 1, and the pressure sensor 5 for detecting the pressure when the ear is pressed against the receiver is provided on the device substrate 3 or the front housing 1. A distance sensor provided using infrared rays for detecting the distance between the handset and the ear, 6 is a receiver or handset assembled on the device substrate 3 or the front housing 1, and 7 is a front housing 1. An operating unit such as a keyboard incorporated to operate the device substrate 3; a display unit such as a display 8 mounted on the device substrate 3;
Is a microphone for transmission provided on the device substrate 3 or the front housing 1, 10 is an antenna assembled to the rear housing 2, 11 is a cover for the pressure sensor 4 provided on the front housing 1, and 12 is A sound hole for the distance sensor 5 provided in the cover 11, 13 is a receiving sound hole of the front housing 1, and 14 is a transmitting sound hole of the front housing 1.

FIG. 2 is a block diagram of the mobile phone of the present invention.

In FIG. 2, reference numeral 21 is a CPU for controlling the entire mobile phone, and the CPU 21 performs various arithmetic processes related to a telephone call and processes such as an instruction to switch the volume of a ring tone or voice. . The operation unit 7 includes the CPU 21.
It is operated by the user when making a call, key input at the time of starting / ending a call, and setting functions. The display unit 8 is connected to the CPU 21 and displays a selection screen when setting a function, a setting state of the function, and the like. The pressure / distance detection circuit 22 includes a CPU 21, a pressure sensor 4,
The pressure sensors 4 and 5 are respectively connected to the distance sensors 5 and notify the CPU 21 of pressure data and distance data detected by the pressure sensors 4 and 5.

The radio section 23 is connected to the CPU 21 and communicates with a base station not shown in the figure. The antenna 10 is connected to the wireless unit 23. DSP24,
It is connected to the CPU 21 and the wireless unit 23, and performs processing such as reception signal characteristics and wireless circuit connection with a base station, call channel switching, and audio signal processing between the wireless unit 23 and the receiver 6 and the microphone 9.

The memory 25 is connected to the CPU 21 and the DSP 24 and stores melody data used for a ring tone, processing data such as a calculation result in the CPU 21, and various function setting data. A / D / D / A converter 26
Is connected to the DSP 24 and converts a digital audio / music signal output from the DSP 24 into an analog signal. The volume switching control unit 27 is connected to the CPU 21, and performs volume switching control of the receiver 6 according to a control signal output from the CPU 21. Therefore, the volume switching control unit 27 controls the volume of the analog signal output from the A / D / D / A converter 26, and outputs the voice of the controlled volume to the receiver 6 via the reception amplifier 28. Is configured.

Next, the operation of the present invention will be described with reference to FIGS.

FIG. 3 is a flow chart for setting the automatic volume control function of the present invention.

It is assumed that the listening volume (output volume of the receiver 6) of the portable telephone set in the standby state of step 1 is preset. In step 2, a specific key of the operation unit 7 is pressed to select whether or not to set the automatic listening volume adjusting function of the present invention. When the automatic listening volume adjusting function is not set (when it is off), the standby state of step 6 is set.

In step 2, when the automatic listening volume adjusting function is set (when it is ON), the CPU 21 stores "automatic listening volume adjusting function ON" data indicating that the automatic listening volume adjusting function is set in the memory 25. To store. In step 3, it is determined whether or not there is an initial value of the distance / pressure data (the volume changes depending on the amount of change from the initial value, so initial value setting is required). If there is no initial value, the operation unit 7 is operated in step 4. The specific key of is pressed to instruct the memory 25 to store the initial values of the pressure data and the distance data. If there is an initial value, the process branches to step 5, and when the receiver 6 is used, signal processing is performed by the DSP 24 and the received voice is received by the receiver 6.
When output from, through the pressure / distance detection circuit 22,
An instruction is issued to activate the pressure sensor 4 and the distance sensor 5, and the standby state of step 6 is set.

Next, the operation of the mobile phone during a call will be described with reference to the flowchart of FIG.

When the mobile phone enters the call state (step 21) from the standby state (step 6 in FIG. 3), the CPU 21 stores in the memory 25 whether or not the automatic listening volume adjusting function is in the operating state. The determination is made based on the data (step 22). If the result of determination is that "volume adjustment function is off", a call is started at the preset listening volume (step 23). Further, when it is determined in step 22 that the “volume adjustment function is on”, both the pressure sensor 4 and the distance sensor 5 are activated, and the preset initial value of the pressure sensor 4 and the preset initial value of the distance sensor 5 are set. A call is made at the received volume based on the received volume (step 24). In this state, it is assumed that the volume data based on the amount of change in pressure / distance from the initial value is preset.

During the call in step 25, when the receiving volume is low and the ear is pressed strongly against the receiver 6, the pressure sensor 4 detects a pressure increase from the initial value (step 2
6), CPU21 via the pressure / distance detection circuit 22
However, the volume switching control unit 27 instructs the volume switching control unit 27 to increase the reception volume. When the volume of the received voice becomes large and the pressing force is stopped, the volume of the received voice is fixed (step 27).

When the listening volume is high (step 2
8) When the receiver 6 is moved away from the ear, the distance sensor 5 detects the distance (step 29), and the CPU 21 causes the sound volume switching control unit 2 via the pressure / distance detection circuit 22.
A control instruction is issued to 7 so as to reduce the listening volume, and as a result, the listening volume is reduced, and when the distance is stopped, the listening volume is fixed (step 30).

Also, the listening volume is not low in step 25 (the ear is not pressed strongly), and step 2
The volume of the earpiece is not loud at 8 (do not keep your ears away)
In this case, it is possible to make a call with the listening volume set in advance.

When the call ends and the end key of the operation unit 7 is pressed (step 31), the first standby state is established. (Second Specific Example) FIG. 5 is a block diagram showing a second specific example of the present invention.

When the distance from the ear to the receiving section is increased, the low-frequency volume tends to deteriorate due to the characteristics of the receiver. Therefore, the pressure sensor 4 and the distance sensor 5 are used, and the receiver 6 is used.
The filter 29 for controlling the frequency characteristic of the receiving amplifier 28
Provided in front, control is performed to switch to a filter that emphasizes low-frequency characteristics as the distance between the handset and the ear increases, and emphasizes low-frequency characteristics as the ear moves away from the handset.
It is also possible to control so that the volume and sound quality do not change even when the ear is away from the handset.

[0026]

Since the automatic volume control device for a telephone according to the present invention is constructed as described above, the volume which has been conventionally adjusted by pressing or turning a switch or button is pressed against the ear by the earpiece. As a result, the earpiece volume can be automatically adjusted by removing the ear from the earpiece unit, and the telephone call at the optimum volume can be performed.

Further, by previously storing the distance between the user's handset and the ear and the pressure thereof, it becomes possible to adjust the volume according to the user. Call is possible.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a telephone according to the present invention.

FIG. 2 is a block diagram of a first specific example of an automatic volume control device for a telephone according to the present invention.

FIG. 3 is a flowchart showing the operation of the present invention.

FIG. 4 is a flowchart showing the operation of the present invention.

FIG. 5 is a block diagram of a second specific example of the present invention.

[Explanation of symbols]

1 Front case 2 rear housing 3 device board 4 Pressure sensor 5 distance sensor 6 receiver 7 Operation part 8 Display 9 Microphone for transmission 10 antennas 11 Pressure sensor cover 12 Sound hole for distance sensor 13 Earpiece hole 14 Transmitting sound hole

Claims (4)

[Claims] 1. A pressure sensor for measuring the pressure when pressing the ear against the handset, and a distance sensor for measuring the distance between the handset and the ear when the ear is moved away from the handset,
An automatic volume adjusting device for a telephone, comprising volume control means for controlling a reception volume of the handset based on pressure data measured by the pressure sensor and distance data measured by the distance sensor. 2. When the pressure sensor detects a pressure equal to or higher than a preset initial value, the volume control means increases the volume according to the difference between the pressure measured by the pressure sensor and the initial value. When the distance sensor detects a distance equal to or larger than a preset initial value, the volume control means determines the difference between the distance measured by the distance sensor and the initial value. The automatic volume adjusting device for a telephone according to claim 1, wherein the reception volume is controlled so as to reduce the volume. 3. The telephone according to claim 2, further comprising frequency characteristic control means for controlling frequency characteristic of the handset according to a difference between the distance measured by the distance sensor and the initial value. Automatic volume control device. 4. The telephone according to claim 2, further comprising initial value setting means for setting the initial value for pressure detection and the initial value for distance detection. Automatic volume control device.