JP2001309002A - Portable mobile communication terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a portable mobile communication terminal realizing a call whose sound volume and quality are satisfactory even when a casing is miniaturized and a display unit is enlarged. SOLUTION: In a very small portable mobile communication terminal, a receiver port for a very small receiver used in a regular call is installed on the surface of the casing and a speaker port for a loud speaker used at the time of a hands-free call is arranged at the back of the casing. A key operation part as a backside call mode selection means for selecting a mode at the time of the call and a loud speaker sound volume switch for adjusting the output sound volume of the loud speaker are installed. When the backside call mode is selected by using the key operation part, the output sound volume of the loud speaker is adjusted using the loud speaker sound volume switch so that the sound volume of the speaker is reduced to a set level.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable mobile communication terminal such as a PHS or a portable telephone, and more particularly to a portable mobile communication terminal having a hands-free communication function.

[0002]

2. Description of the Related Art One example of a conventional portable telephone is as follows.
A receiver port that outputs sound from a receiver for normal calls is placed on the upper surface of the mobile phone housing, and a phone number, operation status indicator, and buttons for detecting various operations are placed below the receiver port. In some cases, a microphone opening for guiding voice to a microphone for transmitting voice is arranged at a lower portion of the surface of the housing.

[0003] When making a normal call using such a mobile phone, the user performs an operation of making (or receiving) a call using a button, and then places his or her ear on a receiver mouth and places a microphone on the receiver. Talk with your mouth close to your mouth.

[0004] In addition to the above-described embodiment, there is a mobile phone that has a built-in speaker for loudspeaker and a speaker port for outputting sound from the speaker is arranged on the back of the housing. This speaker is used, for example, when both hands are occupied, and is used at the time of a so-called hands-free call, in which the speaker outputs a loud sound instead of putting the receiver mouth on the ear to make a call. .

Further, there is a portable telephone provided with a flip which is a cover for protecting a button, and the flip is attached to a lower end portion of a housing via an opening / closing mechanism. During a call, the flip is held in a state of being opened by about 120 °. By closing the flip during standby, it is possible to prevent the button from being unintentionally pressed, and by making a call with the flip open, noise around the microphone can be reduced.

[0006]

In a portable mobile communication terminal represented by such a mobile phone, the size of the housing has been reduced and the communication of character information and image information such as transmission and reception of mail has been supported. Therefore, the size of the display is increasing. Therefore, miniaturization of the receiver for normal telephone calls arranged at the upper part of the display and reduction of the space for the portion where the receiver port arranged at the upper part of the display is provided on the surface of the housing have been attempted. I have. As a result, there has been a problem that the sound volume and the sound quality are deteriorated due to the downsizing of the receiver, and the sound leakage occurs due to the small space at the portion where the receiver port is provided, so that it becomes difficult to hear the received voice during the call.

The present invention has been made in order to solve such a problem, and it is possible to make a call with good volume and sound quality even when the size of the housing is reduced and the size of the display is increased. A portable mobile communication terminal is provided.

[0008]

A portable mobile communication terminal according to the present invention is provided with a receiver port for a receiver used in a normal telephone call on a surface of a housing, and a speaker for a public speaker used in a hands-free call. A portable mobile communication terminal in which a speaker port for a speaker is provided on a back surface of a housing,
A back-call mode selection means for selecting a mode during a call;
And a speaker volume switching unit for speaker for adjusting the output volume of the speaker for speaker.
The output volume of the speaker for loudspeaker is adjusted to be lower than the set volume by the loudspeaker speaker volume switching means.

According to the present invention, it is possible to make a call similar to a normal call using the speaker and the microphone while outputting a low-volume received voice from the speaker for loudspeakers.

A flip having a built-in microphone for transmitting voice and having a microphone opening for the microphone at the tip is attached to the lower end of the housing.
An opening / closing mechanism that can be opened and closed from a closed position along the surface of the housing to a surface open position bent to the front side and a back open position bent to the back side through a state of hanging at the lower end of the housing. Is also good. In this case, the microphone opening can be brought closer to the user's mouth during the back-end call.

[0011] Further, there may be provided a transmission gain switching means for switching the transmission gain according to the bending angle of the flip to switch the transmission sensitivity. In this case, the transmission sensitivity can be appropriately switched according to the bending angle of the flip.

The present invention further comprises a bending angle detecting means for detecting a bending angle of the flip. When the bending angle detecting means detects a bending angle indicating that the flip is opened to the back opening position, the back side call mode is set. The back communication mode may be selected by the selection means. In this case,
The transmission sensitivity can be automatically switched according to the bending angle of the flip.

[0013] Further, there is provided a transmission gain switching means for switching the transmission gain by switching the transmission gain, wherein the flip is in the closed position, the flip is open to the surface open position,
Alternatively, when the bending angle indicating that the door has been opened to the back open position is detected by the bending angle detection unit, the transmission gain may be switched by the transmission gain switching unit according to the value of the bending angle. In this case, the transmission sensitivity can be automatically switched according to the bending angle of the flip.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a portable mobile communication terminal according to the present invention will be described by taking a portable telephone as an example.

FIGS. 1 and 2 are perspective views showing the appearance of a portable telephone as an embodiment of a portable mobile communication terminal according to the present invention. FIG. 1 shows a casing of the portable telephone as viewed from the front side. FIG. 2 is an external view of the case of the mobile phone as viewed from the rear side.

[0016] Here, a call in which a user speaks by placing his / her ear on a receiver port provided on the surface of the housing of the mobile phone is called a normal call mode, and a speaker port provided on the back of the housing of the mobile phone. A call in which a call is made with the ear in contact is called a rear call mode.

This portable telephone has an antenna 1 for transmitting and receiving a voice signal, a receiver port 2 for outputting a voice from an ultra-small receiver for a normal call, which is arranged on a surface S1 of a housing 9, and a receiver port 2. A display 3 for displaying a telephone number, an operation state and data information disposed at the lower part of the two ports, and a display for starting and ending a call, which is disposed at a lower part of the display 3.
A key operation unit 4 for performing mode selection such as selection of a backside call mode and key operations such as dialing; a flip 5 attached to a lower end of a housing 9 via a hinge 6 as an opening / closing mechanism; A microphone port 7 disposed on the flip 5 for guiding voice to a microphone for transmitting voice, and a voice from a speaker for loudspeaker disposed at the upper part of the rear surface S2 of the housing 9 and used at the time of a hands-free call. And a speaker port 8 for outputting the same.

The hinge portion 6 opens the flip 5 by about 120 ° from a closed position along the surface S1 of the housing 9 (that is, a state in which the flip operation portion 5 covers and protects the key operation portion 4). The front open position bent to the front surface S1 side (the position shown in FIG. 1) and the rear open position bent to the back S2 side by opening about 240 ° through the state of hanging at the lower end of the housing 9 (shown in FIG. 2) Position), and has a mechanism structure for keeping the flip 5 at the closed position, the front open position or the back open position. The bending angle of the flip at the front surface open position and the back surface open position is not limited to the above 120 ° or 240 °, but changes according to a set value at the time of design.

Further, the mobile phone has therein a push switch (to be described later) as a bending angle detecting means for detecting a bending angle of the flip 5, and
The push switch is pressed by a protrusion (also described later) provided on the hinge 6,
It detects that the flip 5 is in the closed position, the front open position or the back open position.

FIGS. 3 and 4 are perspective views showing an example of the bending angle detecting means of the mobile phone shown in FIG. 1. FIG. 3 is a perspective view showing the mobile phone viewed from the side, and FIG. It is a perspective view which shows the state which looked at the mobile telephone from the side. Note that a portion arranged inside the housing 9 is indicated by a broken line, and the flip 5 is kept at the back open position.

Here, the push switch is pressed by the back projection 18 of the hinge 6 to detect the back open position, and is pushed by the front projection 20 of the hinge 6. And a front push switch 21 for detecting the closed position.

Therefore, when the flip 5 is closed, the front push switch 21 is pushed by the front projection 20 of the hinge 6 to turn on the front push switch 21, and the flip 5 is kept in the closed position. Is detected. When the user opens the flip 7 by about 240 °, the rear push switch 19 is pushed by the rear projection 18 of the hinge 6 to turn on the rear push switch 19, and the flip 5 is moved to the rear open position. Is maintained. Further, when the user opens the flip 5 by about 120 °, both the rear push switch 19 and the front push switch 21 are turned off.
Then, it is detected that the flip 5 is kept at the surface open position (accurately, it is located within the range of 0 ° to 240 °).

FIG. 5 is a block diagram showing the configuration of the portable telephone shown in FIG.

The portable telephone comprises a display 3 shown in FIG.
2, a receiver 22 for a normal call that outputs a voice through the receiver port 2, a microphone 27 for a transmission voice that captures a voice via the microphone port 7 illustrated in FIG. 1, and a speaker port 8 illustrated in FIG. 2. Speaker 28 for outputting voice
A key operation unit detecting means 10 for detecting an operation performed by the key operation unit 4 shown in FIG. 1; a rear push switch 19 and a front push switch 2 shown in FIG. 3 and FIG.
1 and a bending angle detecting means 11 for detecting an angle at which the flip 5 is opened, and an antenna 1 shown in FIG.
A radio unit 12 that converts an audio signal, a control signal, or the like into a high-frequency signal and emits it as a radio wave from the antenna 1; An audio codec signal processing unit 13 for expanding the compressed signal to return to an audio signal,
The wireless unit 12 according to the detection result by the bending angle detecting means 11
And a control unit 14 for activating the audio codec signal processing unit 13, switching the audio path, controlling the volume and the display 3.

Further, the portable telephone changes the transmission gain of the transmission voice signal from the microphone 27 in accordance with the information from the control unit 14 to switch the transmission sensitivity, and a voice codec signal processing unit. A case where the received voice signal is output to the receiver 22 for normal communication or to the speaker 28 for loudspeaker, and the received voice signal is output to the speaker 28 for loudspeaker. A speaker output volume switch 17 for loudspeaker, which switches the level of the audio output to a high volume according to the information from the control unit 14 during a hands-free call and switches the audio output level to a low volume according to the information from the control unit 14 during a back call. It has.

Next, an operation example of the mobile phone shown in FIG. 5 will be described with reference to FIGS. 1, 2, 5 and 6.

FIG. 6 is a flowchart showing an operation example of the mobile phone shown in FIG.

First, when the user performs an operation of making a call (or receiving a call) using the key operation unit 4, the mode of the mobile phone is changed to a standby mode (IDLE).
When the user presses (or presses) the hands-free key switch (hands-free key SW) on the key operation unit 4 when the mode is changed from the normal call mode to the normal call mode (the normal call state M1). The free key switch is turned on (the determination result in step S1 is YE
S), the mobile phone switches to the hands-free mode (hands-free state M2).

On the other hand, when the mode of the portable telephone is the normal call mode, the user operates the key operation unit 4 while the hands-free key switch is kept OFF (the determination result in step S1 is NO). By operating the call mode switch key switch (call mode switch key SW) in (2) (when the determination result in step S2 is YES), the mobile phone switches to the back call state M3.

It should be noted that even if the call mode switch key switch is not operated (the determination result in step S2 is NO)
However, when the user opens the flip 5 to the rear side to about 240 °, the bending angle of the flip 5 is detected to be 240 ° by the bending angle detecting means arranged near the hinge 6. (The result of the determination in step S3 becomes 240 °), the mobile phone switches to the back side call state M3.

If it is detected by the bending angle detecting means that the bending angle of the flip 5 is 120 ° (if the judgment result in step S3 is 120 °),
Until the user presses the end key switch (end key SW) in the key operation unit 4 (while the determination result in step S4 is NO), the process returns to step S1 while maintaining the normal call state. On the other hand, if the user presses the end key switch on the key operation unit 4 (if the determination result in step S4 is YES), the mobile phone enters the standby mode (ID
The state is switched to the EL state M4).

Furthermore, when the user closes the flip 5, the bending angle detecting means detects that the bending angle of the flip 5 is 0 ° (the result of the determination in step S3 becomes 0 °), and Phone is in standby mode (IDE
The state is switched to the L state M4).

In the above-mentioned hands-free state M2, when the hands-free key switch (hands-free key SW) on the key operation unit 4 is pressed again by the user, the hands-free key switch is turned off (the result of the judgment in step S11 is made). (NO), the mode is switched to the normal call mode, and the process returns to step S1.

On the other hand, with the hands-free key switch kept ON (when the result of the determination in step S11 is YES), the user operates the call mode switching key switch (call mode switching key SW) in the key operation unit 4. Is operated to select the back side call mode (when the determination result in step S12 is YES), the mobile phone switches to the back side call state M3.

Note that even if the call mode switch key switch is not operated (the determination result in step S12 is N)
(O), when the user opens the flip 5 to the rear side to about 240 °, it is detected that the bending angle of the flip 5 is 240 ° by the bending angle detecting means arranged near the hinge 6. Is performed (the determination result in step S13 becomes 240 °), and the mobile phone is switched to the back-side call state M3.

If it is detected by the bending angle detecting means that the bending angle of the flip 5 is 0 ° or 120 ° (the determination result in step S13 is 0 ° or
If it is 120 °), the hands-free state is maintained until the user presses the end key switch (end key SW) in the key operation unit 4 (while the determination result in step S14 is NO). Then, the process returns to step S11. On the other hand, if the user presses the end key switch on the key operation unit 4 (the determination result in step S14 becomes YES), the mobile phone switches to the standby mode (IDEL state M4).

When the user presses the hands-free key switch (hands-free key SW) on the key operation unit 4 in the above-described back-side call state M3, the hands-free key switch is turned on (the result of the determination in step S21 is made). (YES), the mode is switched to the hands-free mode, and the process returns to step S11.

On the other hand, the hands-free key switch is turned off.
(When the determination result in step S21 is NO), and the user operates the call mode switching key switch (call mode switching key SW) in the key operation unit 4 to select the normal call mode ( When the result of the determination in step S22 is YES), the mobile phone switches to the normal call mode, and returns to step S1.

It should be noted that even if the call mode switch key switch is not operated (the determination result in step S22 is N)
(O), when the user opens the flip 5 to the front side to about 120 °, it is detected that the bending angle of the flip 5 is 120 ° by the bending angle detecting means arranged near the hinge 6. Is performed (the determination result in step S23 becomes 120 °), and the process returns to step S1 in the back-side communication mode.

When the user closes the flip 5, the bending angle of the flip 5 is detected to be 0 ° by the bending angle detecting means (the determination result in step S23 is 0 °), and the mobile phone is turned off. Switches to the standby mode (IDEL state M4).

Further, the bending angle of the flip 5 is 24
If it is detected by the bending angle detecting means that the angle is 0 ° (if the determination result in step S23 is 240 °), the user sets the end key switch (end key SW) on the key operation unit 4 Until is pressed (while the determination result in step S24 is NO), the process returns to step S21 while maintaining the back-side communication state. On the other hand, if the user presses the end key switch on the key operation unit 4 (the determination result in step S24 is YES), the mobile phone switches to the standby mode (IDEL state M4).

When the power of the mobile phone is turned on, the mobile phone enters a standby mode (IDLE state). In this state, when the user performs an operation of making a call (or receiving a call), a normal call mode (normal call state M1) is performed. And the operation shown in FIG. 6 is started. This operation is repeated until the power of the mobile phone is turned off.

In the normal call mode, the control unit 1 of the mobile phone
4 controls the received voice changeover switch 16 to the receiver 22 side so that the user can talk using the receiver 22 and the microphone 27.

In the hands-free state, the control unit 14 of the cellular phone switches the receiving voice changeover switch 16 to the speaker 28 for loudspeaker, and the sound output level of the loudspeaker 28 by the loudspeaker speaker volume switch 17. The volume is switched to a high volume (a value set by the user), and control is performed so that the user can make a hands-free call using the speaker 28 and the microphone 27.

Further, in the back side call state, the control unit 14 of the portable telephone switches the receiving voice changeover switch 16 to the loudspeaker 28 side, and the loudspeaker volume switch 17 controls the sound output level of the speaker 28. Is switched to a low volume (a value set by the user), and the transmission gain of the transmission voice signal from the microphone is switched by the transmission gain switching unit 15 in accordance with the bending angle of the flip 5, so that the transmission sensitivity is set to an appropriate state. Then, control is performed so that the user can make a back-to-back call using the speaker 28 and the microphone 27 put on the ears.

If the flip 5 is bent about 120 ° and opened to the front side in this back-side communication state, the microphone opening 7 is separated from the mouth, so that the voice level of the transmission is not insufficient. The sensitivity is adjusted to be high, and if the flip 5 is bent about 240 ° and opened to the back side, the microphone opening 7 approaches the mouth, so that the voice level of the transmission is sufficiently secured, so that the transmission sensitivity is maintained. Is adjusted lower.
As described above, when the sensitivity of the transmission is adjusted to be lower, it is possible to perform a favorable call in which ambient noise is hardly picked up.

[0047]

According to the portable mobile communication terminal of the present invention, a receiver port for a receiver used in a normal call is provided on the surface of the housing, and a speaker for a loudspeaker used in a hands-free call is provided. A portable mobile communication terminal having a speaker opening provided on a rear surface of a housing, wherein a back talk mode selecting means for selecting a mode during a call, and a loud speaker volume switch for adjusting an output volume of the loud speaker. Means for adjusting the output volume of the loudspeaker to a set volume by the loudspeaker volume switching means when the back call mode is selected by the back call mode selection means. According to the present invention, even when the size of the housing is reduced and the size of the display device is increased, it is possible to sufficiently secure a place for accommodating the speaker. Can prevent the deterioration of the sound volume and sound quality, it is possible to prevent sound leakage occurs because it sufficiently secured portion speaker opening is arranged.

A flip having a built-in microphone for transmitting voice and having a microphone opening for the microphone at the tip is attached to the lower end of the housing.
An opening / closing mechanism that can be opened and closed from a closed position along the surface of the housing to a surface open position bent to the front side and a back open position bent to the back side through a state of hanging at the lower end of the housing. In this case, the microphone opening can be brought closer to the user's mouth at the time of the backside call, and as a result, a good call that makes it difficult to pick up ambient noise can be made.

The apparatus may further comprise a transmission gain switching means for switching the transmission gain by switching the transmission gain according to the bending angle of the flip. In this case, the transmission sensitivity may be changed according to the bending angle of the flip. It can be switched appropriately.

Further, a bending angle detecting means for detecting a bending angle of the flip is provided, and when the bending angle indicating that the flip is opened to the back opening position is detected by the bending angle detecting means, the back communication is performed. The back call mode may be selected by the mode selection means. In this case, the sensitivity of the transmission can be automatically switched according to the bending angle of the flip.

Further, there is provided a transmission gain switching means for switching the transmission gain to switch the transmission sensitivity, wherein the flip is in the closed position, the flip is open to the surface open position,
Alternatively, when a bending angle indicating that the door has been opened to the back open position is detected by the bending angle detection unit, the transmission gain may be switched by the transmission gain switching unit according to the value of the bending angle. In this case, the transmission sensitivity can be automatically switched according to the bending angle of the flip.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the appearance of a mobile phone as an embodiment of a mobile communication terminal according to the present invention.

FIG. 2 is a perspective view showing the appearance of a mobile phone as one embodiment of the mobile communication terminal of the present invention.

FIG. 3 is a perspective view showing an example of a bending angle detecting unit of the mobile phone shown in FIG.

FIG. 4 is a perspective view showing an example of a bending angle detecting means of the mobile phone shown in FIG.

FIG. 5 is a block diagram showing a configuration of the mobile phone shown in FIG.

6 is a flowchart showing an operation example of the mobile phone shown in FIG.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 antenna 2 receiver port 3 display 4 key operation section 5 flip 6 hinge section 7 microphone port 8 speaker port 9 housing 10 key operation section detecting means 11 bending angle detecting means 12 wireless section 13 audio codec signal processing section 14 control section 15 Transmission gain switch 16 Received voice switch 17 Speaker volume switch for loudspeaker 18 Rear projection 19 Rear push switch 20 Front projection 21 Front push switch 22 Receiver 27 Microphone 28 Speaker

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04M 1/21 H04B 7/26 V 1/60 109G

Claims (5)

[Claims] 1. A receiver opening for a receiver used in a normal call is provided on a surface of a housing, and a speaker opening for a speaker for loudspeaker used in a hands-free call is provided on a back surface of the housing. Mobile communication terminal, comprising: a back talk mode selecting means for selecting a mode during a call; and a loudspeaker speaker volume switching means for adjusting an output volume of the loudspeaker; When the back side call mode is selected by the means, the speaker volume switching means for loudspeaker,
A portable mobile communication terminal wherein an output volume of a loudspeaker is reduced to a set volume. 2. A flip having a built-in microphone for transmitting voice and having a microphone opening for the microphone at the tip is attached to the lower end of the housing, and the flip is mounted on the surface of the housing. 2. An opening / closing mechanism according to claim 1, further comprising an opening / closing mechanism that can be opened and closed from a closed position along the surface to a surface open position bent to the front side and a back open position bent to the back side through a state of hanging at the lower end of the housing. Portable mobile communication terminal. 3. The portable mobile communication terminal according to claim 2, further comprising a transmission gain switching means for switching a transmission gain according to a bending angle of the flip to switch transmission sensitivity. 4. A bending angle detecting means for detecting a bending angle of the flip, wherein when the bending angle detecting means detects a bending angle indicating that the flip is opened to the rear opening position, the back surface is provided. 3. The portable mobile communication terminal according to claim 2, wherein the back side call mode is selected by the call mode selection means. 5. A transmission gain switching means for switching a transmission gain to switch transmission sensitivity, wherein a flip is in a closed position, opened to a front open position, or opened to a back open position. 5. The portable mobile communication terminal according to claim 4, wherein when the bending angle indicating the bending angle is detected by the bending angle detection unit, the transmission gain is switched by the transmission gain switching unit according to the value of the bending angle. .