JP2004096573A - Folding portable telephone - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a folding portable telephone that is provided with a plurality of loudspeakers, capable of reproducing a mobile phone melody etc., as a stereophonic melody and can realize sound effects other than the normal stereophonic reproduction. <P>SOLUTION: This folding portable telephone contains a front loudspeaker 6 on the side of an upper case 1, having a displaying surface and a back loudspeaker 7 on an upper cover 2 side. The loudspeakers 6 and 7 are loaded in the telephone by shifting their positions so that their back faces do not overlap each other coaxially. This telephone is provided with first and second reproducing means which respectively independently drive the front and back loudspeakers 6 and 7, based on first and second sound source information related to the mobile phone ringtone, voices, and music. When this telephone is in a folded state, the power consumption of the telephone is saved by making only the back loudspeaker 7 driven, by only operating the second reproducing means. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a foldable mobile phone, and more particularly to a foldable mobile phone having a plurality of speakers and capable of realizing various sound effects such as a stereo effect.
[0002]
[Prior art]
2. Description of the Related Art In recent years, a speaker capable of producing a wideband sound has been adopted in a mobile phone so that a melody or the like is used as a ringtone. In addition, due to an increase in memory capacity and the like, music and voice can be stored, and the era of listening to music by music distribution or the like on a mobile phone as a multifunctional movement is approaching. Furthermore, there is a growing demand for music and audio output for stereo, and a speaker for audio is provided so that the speaker is also used for sound reproduction when shooting a moving image by a camera-equipped mobile phone. Demand for mobile phones is increasing.
[0003]
2. Description of the Related Art Conventionally, as a mobile phone capable of reproducing stereo sound, first and second speakers are provided on the rear side of the end of each housing with respect to the first and second housings of the mobile phone which are foldable. When sound is played, the mobile phone is opened and laid sideways, and a pair of speakers are separated from each other and oriented in substantially the same direction to reproduce stereo sound. (For example, see Patent Document 1).
[0004]
Further, in a mobile phone in which the first and second housings are configured to be foldable, the first and second speakers are mounted on both sides in the width direction on the back side of one of the housings. (See, for example, Non-Patent Document 1).
[0005]
[Patent Document 1]
JP-A-2002-57768 [Non-Patent Document 1]
URL of J-K51
http: // www. j-phone. com / movie-shamail / kenwood. html.
[0006]
[Problems to be solved by the invention]
In the above prior art, the first and second speakers are both mounted on the rear side of the housing, and the foldable mobile phone is in a closed (folded) state or an open state. Regardless of whether or not there is an incoming call, the first and second speakers are simultaneously driven to add a stereo sound effect and make it possible to reproduce the incoming melody. When playing a source other than stereo, such as a source in which singing voice and accompaniment music are separated, an operation that clarifies the singing voice and obtains a special sound effect that causes the accompaniment music to be output in the background. It is difficult.
[0007]
Further, in stereo reproduction, it is necessary to operate two power amplifiers for driving these two speakers, respectively, and the power consumption increases, for example, as compared with the case where one speaker is driven. As a result, there is a problem that the usable time is reduced by one charge of the mobile phone.
[0008]
On the other hand, in general, when the foldable mobile phone is in a folded state, the mobile phone is often stored in a bag or a pocket. Therefore, when the foldable mobile phone is in a folded state, for example, an incoming call is received. There is not much point in playing the sound in stereo.
[0009]
SUMMARY OF THE INVENTION An object of the present invention is to provide a foldable mobile phone having at least two or more speakers capable of playing a ringtone melody or the like as a stereo, in which a sound effect other than the normal stereo playback can be realized. .
[0010]
Another object of the present invention is to reduce power consumption by playing a ringtone melody when the mobile phone is folded, particularly in a foldable mobile phone provided with at least two or more speakers capable of playing a ringtone melody as stereo. It is to provide a means for enabling this.
[0011]
[Means for Solving the Problems]
According to the present invention, in a mobile phone in which a first housing having a display portion and a second housing having an operation portion are configured to be foldable, a front surface (front surface) of the first housing having the display portion is provided. At least one speaker for reproducing a ringtone, voice, and music is mounted on the back surface, facing each surface, at a position where the back surfaces do not overlap each other.
[0012]
In addition, the foldable mobile phone of the present invention includes a memory for storing first sound source information and second sound source information related to the ringtone, voice, and music, and the first and second sound sources read from the memory. It is provided with first and second reproducing means for driving the front speaker and the rear speaker according to second sound source information, and reproducing control means for controlling the operation of the first and second reproducing means. And
[0013]
The first sound source information is, for example, a voice or a singing voice or a main melody of a song, and the second sound source information is, for example, an accompaniment music or a sub melody of the song.
[0014]
Further, the foldable mobile phone of the present invention includes an open / close detection unit that detects whether the foldable mobile phone is in an open state or a closed (folded) state and notifies the playback control unit of the state. When the open / close detection means detects the open state, the reproduction control means outputs the first sound source information by the first reproduction means and the second sound source information by the second reproduction means. When the open / close detecting means detects the closed state, only the second reproducing means is operated, and the first and second sound sources are operated by the second reproducing means. It is characterized in that control is performed so as to reproduce data synthesized with the sound source information.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is a side view of a foldable mobile phone according to a first embodiment of the present invention in an open state, in which only an upper case and an upper cover are shown as side exploded views. FIG. 2 is a front view and a rear view of the foldable mobile phone according to the present embodiment in an open state, and only the upper case and the upper cover side are partially shown by dotted lines in a perspective view.
[0016]
1 and 2, 1 is an upper case, 2 is an upper cover, 3 is a lower case, and 4 is a lower cover. The upper case 1 and the upper cover 2 form a first housing, and the lower case 3 and the lower cover 4 form a second housing. Reference numeral 5 denotes a device board mounted on the upper case 1 side, and although not shown in the figure, the device board 5 is mounted on the lower case 3 side via a flexible board or the like disposed in the hinge 13. It is connected to the device board by a connector or the like.
[0017]
6 is a front speaker installed on the upper case 1 side of the device substrate 5 or directly installed on the upper case 1, 7 is installed on the upper cover 2 side of the device substrate 5 or is mounted on the upper cover 2 It is a rear speaker installed directly. As shown in FIG. 2, the front speaker 6 and the rear speaker 7 are mounted so that the back surfaces of the speakers do not coaxially overlap each other.
[0018]
Reference numeral 8 denotes a receiving speaker that is installed on the upper case 1 side of the device substrate 5 or directly installed on the upper case 1, 9 denotes a display unit such as a liquid crystal display that is installed on the device substrate 5, 10. Denotes an antenna installed on the upper cover 2, and 11 denotes an operation unit which is incorporated in the lower case 3 and has a keyboard for performing various operations of the mobile phone. 1a is a sound hole for the front speaker 6 provided in the upper case 1, 1b is a sound hole for the receiving speaker 8 provided in the upper case 1, 2a is a sound hole for the rear speaker 7 provided in the upper cover 2, 3a Is a transmission (microphone) sound hole provided in the lower case 3.
[0019]
FIG. 3 is a block diagram illustrating an overall circuit configuration of the foldable mobile phone according to the present embodiment.
[0020]
In FIG. 3, a CPU 21 is an arithmetic processing unit that controls the entire mobile phone, and performs processes and instructions related to various arithmetic processes related to telephone calls and communications. For example, when a ringtone including a song (voice) and an accompaniment (music) or a main melody and a sub melody is set as a sound output, the downloaded music data (including music with a song) such as a ringtone is output. Then, for example, it is divided into two pieces of data such as voice (voice) and music, or main melody and sub melody, and stored in the memory, or an instruction of a reading process is performed.
[0021]
The display unit 9 is connected to the CPU 21 and displays a selection screen for setting a function, a setting state of a function, and the like. The operation unit 11 is connected to the CPU 21 and operated by the user for making a call, starting and ending a call, inputting a key when selecting a menu, and the like.
[0022]
The radio unit 22 is connected to the CPU 21 and communicates with a base station not shown in the figure. The antenna 10 is connected to the radio unit 22 described above. A DSP (digital signal processor) 23 is connected to the CPU 21 and the radio unit 22, and performs reception signal processing and radio circuit connection with a base station, etc., switching of communication channels, voice signal processing in the transmission / reception talk unit, ringtone, and the like. Performs melody data signal processing and the like.
[0023]
The memory 24 is connected to the CPU 21 and the DSP 23, and converts data such as a result calculated by the CPU 21 and various function setting states into data and stores them. Further, for example, melody data containing music including a song (voice) is stored separately for accompaniment (music) portion and song (voice) portion data.
[0024]
The open / close detection circuit 25 is connected to the CPU 21, detects the open / close state of the foldable mobile phone, and notifies the CPU 21 of the open / close state. The 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. Conversely, the analog signal collected by the microphone 12 is converted into a digital signal and output to the DSP.
[0025]
The speaker output switching control unit 27 is connected to the CPU 21 and the A / D / D / A converter 26 and controls the output signal from the A / D / D / A converter 26 to be supplied only to the rear speaker 7. Whether to supply to the front speaker 6 and the rear speaker 7 is controlled in accordance with a setting instruction from the CPU 21.
[0026]
Specifically, the speaker output switching control unit 27 sends the analog signal converted by the A / D converter 26 to the rear speaker amplifier 29 so that the analog signal converted by the rear speaker 7 only sounds when the mobile phone is folded. When the mobile phone is open, the analog signal converted by the A / D converter 26 to sound both the front speaker 6 and the rear speaker 7 is output from the front speaker amplifier 28 and the rear speaker amplifier 29. To send to.
[0027]
The DSP 23, the A / D converter 26, the speaker output switching control unit 27, and the front speaker amplifier 28 constitute first playback means for driving the front speaker 6, and the DSP 23, the A / D converter 26, the speaker output switching control unit The second speaker 27 and the rear speaker amplifier 29 constitute a second reproducing unit for driving the rear speaker 7. The CPU 21 also functions as a reproduction control unit that controls the first and second reproduction units.
[0028]
The receiver amplifier 30 is connected to the receiving speaker 8 and is used for amplifying the receiving voice signal converted into an analog signal by the A / D converter 26. The microphone amplifier 31 is connected to the microphone 12, amplifies the transmission voice signal, and transmits the signal to the A / D converter 26.
[0029]
Next, the operation of the foldable mobile phone according to the present embodiment will be described with reference to FIGS.
[0030]
When the mobile phone is in the standby state and the ringing tone is ringing at the time of an incoming call or the mobile phone is opened when the ringing tone is sounded by selecting a ringing tone or the like, the front speaker 6 and the rear speaker 7 Sounds in stereo. On the other hand, when the mobile phone is closed (folded) or closed (folded) while sounding, the front speaker 6 installed on the upper case 1 side does not sound and is installed on the upper cover 2. Only the rear speaker 7 that is set sounds in monaural.
[0031]
For example, when a song (voice) and accompaniment (music) or a ring melody having a main melody and a secondary melody are set as sound outputs, only the song (voice) is displayed in front when the mobile phone is open. The sound effect is enhanced by outputting from the speaker 6 and outputting the accompaniment (music) from the rear speaker 7, or outputting the main melody from the front speaker 6 and outputting the sub melody from the rear speaker 7. On the other hand, when the mobile phone is closed or closed, only the back speaker 7 outputs a song (voice) and accompaniment (music) or data in which the main melody and the sub melody are combined as a monaural sound.
[0032]
Hereinafter, it is assumed that a melody containing music including a song (voice) is selected in advance as a ringtone, and that data, music, and a song in which an accompaniment (music) portion and a song (voice) portion are separated are common. The following description is based on the assumption that the stored data is stored in the memory 24.
[0033]
When the mobile phone is in the standby state, the open / close detection circuit unit 25 detects whether the mobile phone is open or closed (folded), and the detection result is output to the CPU 21. The CPU 21 recognizes the state of the mobile phone based on the output of the open / close detection circuit 25, and stores the recognition result in the memory 24.
[0034]
At the time of receiving a call, the CPU 21 checks whether the state of the foldable mobile phone is closed or open in the holding state of the memory 24, and when the foldable mobile phone is open, the CPU 21 sends the front speaker 6 to the speaker output switching control unit 27. Then, an instruction is issued to sound both the speaker 7 and the rear speaker 7, and the music data and the song (voice) data stored in the memory 24 are sent to the DSP 23. The DSP 23 processes these data and sends them to the D / A converter 26 as digital signals.
[0035]
The signal sent to the D / A converter 26 is converted into an analog signal, and the singing (sound) data is amplified by the front speaker amplifier 28 and supplied to the front speaker 6 via the speaker output switching control unit 27, and the melody is output. Is amplified by the rear speaker amplifier 29 and supplied to the rear speaker 7. Accordingly, a song (voice) is output from the front speaker 6, and music such as a melody is output from the rear speaker 7.
[0036]
At this time, when the sound wave driven by the rear speaker 7 is received from the front side, the phase is inverted. Therefore, the DSP 23 compares the music data and the song (voice) data read from the memory 24 with these two data. The phase of the data signal is adjusted so that the data signal is output to the front side of the mobile phone in the same phase, and is sent to the D / A converter 26.
[0037]
On the other hand, when the mobile phone is closed, the CPU 21 instructs the speaker output switching control unit 27 to sound only the rear speaker 7, and the music and the song stored in the memory 24 are shared. This data is sent to the DSP 23 and sent to the D / A converter 26 as a digital signal. The signal sent to the D / A converter 26 is converted into an analog signal, passed through the speaker output switching control unit 27, amplified by the rear speaker amplifier 29, and output from the speaker 7 installed on the rear side.
[0038]
The same applies to ringing of a ringtone by selecting a ringtone or the like, and the open / close detection circuit unit 25 immediately sends the state to the CPU 21 according to the open / closed state of the mobile phone, and controls the ringing according to an instruction from the CPU 21.
[0039]
In the embodiment, the description has been made assuming that the data common to the music and the song is stored in the memory 24. However, when the foldable mobile phone is closed, the accompaniment (music) portion read from the memory 24 is read. It is also possible to combine the data in which the data and the song (voice) part are separated by the DSP 23 and output it to the rear speaker amplifier 29 side.
[0040]
In the present embodiment, when the foldable mobile phone is closed (when folded), only the rear speaker 7 sounds without driving the front speaker 6, so that the current consumption can be reduced accordingly. In a mobile phone capable of realizing various sound effects by mounting a plurality of speakers, it is possible to extend the use time per charge compared to the related art.
[0041]
FIG. 4 is a front view and a rear view of a foldable mobile phone according to a second embodiment of the present invention in an open state.
[0042]
In the present embodiment, the mounting positions of the front speaker 6 and the rear speaker 7 are set as far apart as possible in the width direction (on the X axis) of the mobile phone, and the distance between the speaker sound holes 1a and 2a is also similarly set. To enhance the stereo sound effect. Further, the stereo sound effect can be further improved by adjusting the phase of the signal input to each speaker.
[0043]
FIG. 5 is a front view and a rear view of a foldable mobile phone according to a third embodiment of the present invention in an open state.
[0044]
In the present embodiment, the front speakers 6 are arranged at the center of the mobile phone in the width direction (on the X axis), and the two rear speakers 7, 7 'are arranged at both ends of the mobile phone in the width direction. Surround can be reproduced by three speakers. In this case, by changing the front-side speaker 6 to a low-frequency-oriented speaker, more realistic sound reproduction becomes possible.
[0045]
【The invention's effect】
In the foldable mobile phone of the present invention, at least one speaker is arranged on the front side, at least one speaker is arranged on the back side, and the speakers are mounted so that the back sides do not overlap each other. For example, by outputting sound from the front and playing a melody from the back, it is possible to provide a distinctive ringtone, especially when a concert movie etc. is delivered, singing voice from the front and music from the back This makes it possible to enjoy powerful images and music. Also, the surround effect can be realized relatively easily.
[0046]
Further, when the foldable mobile phone of the present invention is in a closed (folded) state, the speaker arranged on the front side is not operated, and only the speaker arranged on the back side is driven. Power consumption can be reduced.
[Brief description of the drawings]
FIG. 1 is a side view of a foldable mobile phone according to a first embodiment of the present invention in an open state.
FIG. 2 is a front view and a rear view of the foldable mobile phone according to the embodiment in an open state.
FIG. 3 is a block diagram illustrating a circuit configuration of the foldable mobile phone according to the embodiment;
FIG. 4 is a front view and a rear view of a foldable mobile phone according to a second embodiment of the present invention in an open state.
FIG. 5 is a front view and a rear view of a foldable mobile phone according to a third embodiment of the present invention in an open state.
[Explanation of symbols]
Reference Signs List 1 upper case 1a front speaker sound hole 2 upper cover 2a rear speaker sound hole 3 lower case 3a transmitting (microphone) sound hole 4 lower cover 5 device board 6 front speaker 7 rear speaker 8 receiving speaker 9 display unit 10 Antenna 11 Operation unit 12 Microphone 13 Hinge 21 CPU (central processing unit)
22 Radio unit 23 DSP (digital signal processor)
24 Memory 25 Open / close detection circuit 26 A / D / D / A converter 27 Speaker output switching control unit 28 Front speaker amplifier 29 Rear speaker amplifier 30 Receiver amplifier 31 Microphone amplifier

Claims (8)

In a mobile phone in which a first housing having a display unit and a second housing having an operation unit are configured to be foldable, a ringtone, voice, and music are provided on the front and back surfaces of the first housing. Characterized in that at least one loudspeaker for playing back is installed at a position facing each surface and at a position where the back surfaces of the loudspeakers do not overlap each other. The speaker mounted on the front side (front speaker) and the speaker mounted on the back side (rear speaker) may be one speaker disposed at one end in the width direction of the first housing. 2. The foldable mobile phone according to claim 1, wherein the loudspeaker and the rear loudspeaker are constituted by one loudspeaker arranged at the other end. In the width direction of the first housing, the front speaker and the rear speaker are one speaker disposed at a central portion, and the rear speaker is two speakers disposed at both ends in the width direction of the first housing. The foldable mobile phone according to claim 1, wherein the foldable mobile phone is configured. A memory for storing first sound source information and second sound source information related to the ringtone, voice, and music, and the first speaker and the second sound source information read from the memory, the front speaker and the 4. The apparatus according to claim 1, further comprising: first and second reproducing means for driving a rear speaker, and reproduction control means for controlling an operation of the first and second reproducing means. The foldable mobile phone as described. The foldable mobile phone according to claim 4, wherein the first sound source information is a voice or a singing voice, and the second sound source information is an accompaniment music. The foldable portable telephone according to claim 4, wherein the first sound source information is a main melody of a music piece, and the second sound source information is a sub melody of the music piece. Opening / closing detecting means for detecting whether the foldable mobile phone is in an open state or a closed (folded) state and notifying the playback control means, and wherein the playback control means includes the open / close detection When the means is detecting the open state, the first reproducing means reproduces the first sound source information, and the second reproducing means reproduces the second sound source information. When the means detects the closed state, only the second reproducing means is operated, and the second reproducing means reproduces the combined data of the first and second sound source information. 5. The foldable mobile phone according to claim 4, wherein the foldable mobile phone is controlled. 8. The apparatus according to claim 4, wherein said reproducing means has means for adjusting a phase of said first and second sound source information inputted to said first and second reproducing means. The foldable mobile phone described in Crab.

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