KR100692773B1 - Receiver-loud part integrating speaker and mobile phone including the same - Google Patents

Abstract

The present invention relates to a dual speaker structure in which a receiver-loudspeaker is integrated and a mobile communication terminal using the same. The dual speaker according to the present invention includes a receiver speaker unit 40, And a loudspeaker unit 30. Each speaker unit includes a frame, a voice coil, a magnet, and a diaphragm. The mobile communication terminal according to the present invention is equipped with a dual speaker, and can selectively perform an earful call or a speakerphone function according to the selection of a user or the opening / closing of a folder (flip).

The manufacturing cost and volume of the mobile communication terminal having the speakerphone function can be reduced by using the integrated dual speaker according to the present invention.

Cell phones, loudspeakers, receivers, dual speakers

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a dual loudspeaker integrated with a receiver-loudspeaker and a mobile communication terminal having the same.             

1 is a block diagram showing the internal structure of a general conventional cellular phone.

FIG. 2 shows an embodiment of a dual loudspeaker integrated with a receiver-loudspeaker according to the present invention, wherein FIG. 2A is a perspective view and FIG. 2B is a sectional view.

3 is a block diagram illustrating an internal configuration of a cellular phone having a dual speaker of an integrated receiver-loudspeaker according to the present invention.

Fig. 4 shows a dual speaker arranged in a folder-type cellular phone. Fig. 4 (a) shows a state in which a folder is opened, and Fig. 4 (b) shows a state in which a folder is closed.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a voice signal input / output unit of a cellular phone, and more particularly, to a mobile communication terminal having a dual speaker structure in which a receiver of a cellular phone and an external loud speaker are integrated.                         

In a conventional cellular phone, when a user speaks to a microphone of a cellular phone to make a call, an electric signal generated by the microphone is transmitted to a counterpart communication device through a processor such as a predetermined modulation and amplification. The other party's cellular phone receives and modulates the transmitted signal, generates an analog voice signal, and outputs it to the user through the receiver.

In recent years, a mobile phone has been developed that includes an external loudspeaker in addition to a receiver, which is a small-capacity speaker of a cellular phone, to enable a so-called "speaker phone" The conversation of such a speakerphone is performed by inputting a voice of a talker into a microphone (a transmitter) of a cellular phone, converting the received signal into a voice signal, and outputting the voice signal to an external loudspeaker. Thus, the user can make a call while listening to a call through a loudspeaker at a certain distance without touching the cellular phone with the ear.

Such a cellular phone including an external loudspeaker is disclosed in Korean Patent Application No. 1996-056712. In the above-described invention, a loudspeaker for changing the voice into an electric signal, a loudspeaker for outputting a voice signal to be applied, a signal amplifying unit generally used for generating a high-band signal while preventing aliasing of the signal, A signal modulating section, an elimination agent rejecting section, a high frequency filter section, and a signal processing section. A feature of the above-described invention is that it is equipped with an external loudspeaker and / or a microphone, unlike a conventional cellular phone.

In recent years, many accessories have been developed to make calls without freeing the mobile phone and holding it close to the ear, one of which is a hands-free set such as an earphone-type earset. In addition, as in the above-mentioned patent invention, an external speaker (and an external microphone) is mounted on a cellular phone, and a user can use a cellular phone capable of transmitting and receiving a voice using an external speaker Phone is being developed. Such a cellular phone has an external loudspeaker in addition to a conventional cellular phone configuration. The user can arbitrarily make a call using a receiver and a speaker phone call using an external loudspeaker in a state in which the user is in close contact with the ear by a predetermined switching operation Let's do it.

However, since a loudspeaker, which is relatively larger than the receiver, must be additionally installed for such a speakerphone call, the manufacturing cost of the cellular phone is increased, and the size (volume) of the terminal is also increased.

The present invention has been developed in order to overcome the disadvantages of a conventional cellular phone having a speakerphone function and aims to reduce manufacturing cost and volume by integrally forming a receiver and an external loudspeaker.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a mobile communication terminal capable of making a call without being in close contact with the ear without using additional accessories.

Another object of the present invention is to provide a dual-speaker system in which a receiver (small capacity speaker) and a loudspeaker are integrally integrated.

Another object of the present invention is to provide a mobile communication terminal of a speakerphone call function which can be manufactured at a relatively low cost and has a small volume by using the above-mentioned dual speaker system.

In order to accomplish the object of the present invention as described above, there is provided a double speaker including a receiver (small capacity speaker) -low loudspeaker and a mobile communication terminal including the dual speaker.

A dual loudspeaker integrated with a receiver-loudspeaker according to the present invention includes a cylindrical loudspeaker, a first magnet fixed annularly to one surface of the frame, a first voice coil disposed annularly inside the first magnet, And a first diaphragm connected to the first voice coil and disposed between the inner surface of the louver subframe and the fixed first magnet, and a second diaphragm connected to the first voice coil and having a diameter smaller than that of the louver frame A cylindrical second magnet fixed to the center of one surface of the inside of the receiver frame in a direction in which the first magnet is fixed; an annular second voice coil arranged to surround the second magnet; A second voice coil connected to the other surface of the receiver frame, 2, the receiver part consists speaker consisting of the second diaphragm is disposed between a magnet. Here, the second voice coil and the second diaphragm have smaller diameters than the first voice coil and the first diaphragm, respectively.

The louver frame is formed as a closed frame having a cylindrical groove with a predetermined diameter at a lower portion thereof. The receiver frame is a closed frame formed of a cylindrical lid having a diameter larger than that of the cylindrical groove and the groove covering the cylindrical groove, And the second magnet and the second voice coil may be disposed inside the cylindrical groove.

The present invention also provides a mobile communication terminal including a dual speaker integrated loudspeaker as described above and a dual speaker selection switching unit for selectively operating only one of the receiver speaker and the loudspeaker of the dual speaker. Such a mobile communication terminal selectively activates the receiver unit and the loudspeaker unit of the dual speakers according to the user's (button) selection or the opening / closing of the folder (or flip), thereby enabling both normal earphone calls or speakerphone calls.

The mobile communication terminal according to the present invention is a concept including all portable equipment capable of voice communication with other people such as a general cellular phone (cellular phone), a PCS phone, a personal digital assistant (PDA), an IMT-2000 terminal and a satellite communication terminal.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a dual loudspeaker integrated with a receiver-loudspeaker according to the present invention and a cellular phone including the same will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing an internal configuration of a general cellular phone.

As shown in Fig. 1, the internal structure of the cellular phone except the housing includes a high frequency amplifier 11, a transmission frequency synthesizing circuit 13, a reception frequency synthesizing circuit 12, a demodulator 14, a modulator 15, an audio processor 16 A PCB circuit part 10 including a control part 17 and an antenna 23 connected to a PCB circuit part, a receiver speaker 18, a microphone 19, a keypad 20 and an LCD display 21 .                     

A communication flow using such a mobile phone will be briefly described. When a user inputs a telephone number using a key operation of the keypad 20, a signal is transmitted to the relay station through the antenna 23. The voice of the talker is converted into an electrical signal through the microphone 19 and the audio processor 16 applies the modulated signal to the modulator 15 so that the signal is modulated, synthesis circuit. The synthesized high-frequency output is amplified by the high-frequency amplifier 11 and then transmitted using the antenna 23.

The signal received by the antenna from the relay station is amplified by the high-frequency amplifier 11 and converted into a baseband signal by the reception frequency synthesizing circuit 12. The baseband signal is demodulated by a demodulator 15 and then delivered to the audio processor 16, which outputs audio through the speaker 18 so that it can hear the other party's voice.

Among the above components, the transmitting and receiving frequency synthesizing circuits 12 and 13, the audio processor 16 and the control unit 17 are made up of various subcomponents. The description of the configuration of such a cellular phone is generally known The detailed description thereof will be omitted herein.

FIG. 2 shows an embodiment of a dual loudspeaker integrated with a receiver-loudspeaker according to the present invention, wherein FIG. 2A is a perspective view and FIG. 2B is a sectional view.

Typical loudspeakers consist largely of a ring-shaped magnet (magnet), an annular voice coil placed inside or outside the magnet, and a diaphragm (or vibrating cone) connected to the voice coil. The voice coil is located inside the magnetic field generated by the magnets. When the electric signal is applied to the coil, current flows in the coil. The voice coil is moved up and down (or left and right) by the interaction of the magnetic moment generated by the voice coil and the magnetic field generated by the magnet by the current, and the diaphragm fixed to the voice coil vibrates together, Voice (or sound) is output. In addition, a damper may be additionally provided to increase the reactivity of the vibration and to prevent the diaphragm from vibrating abnormally.

The dual speaker according to the present invention shown in FIG. 2 also uses the general principle of such a speaker. As shown in FIG. 2A, the dual speaker includes a loud speaker unit 30 and a receiver speaker unit 40, , Two cylindrical speakers having different sizes are adhered to each other.

2A is a cross-sectional view taken along the line aa in FIG. 2A. The loudspeaker 30 includes a closed loudspeaker 31 having a cylindrical groove at the bottom thereof, and an annular loudspeaker 31 fixedly attached to a lower surface of the loudspeaker, An annular first voice coil 33 disposed between the side face of the cylindrical groove and the annular first magnet, and a first diaphragm 34 attached to the first voice coil.

The receiver speaker unit 40 has the following configuration. A cylindrical lid which is larger than the diameter of the cylindrical groove of the loudspeaker frame and smaller than the total diameter of the loudspeaker frame and whose one side is open covers the cylindrical groove. This cylindrical lid and a part of the loudspeaker form a closed-type receiver frame 41. A second magnet 42 is fixed to the bottom of the cylindrical groove in the receiver frame 41. An annular second voice coil 43 is disposed so as to surround the second magnet 42. A second diaphragm 44 are attached.

The first diaphragm receives a force in an upward direction and the second diaphragm receives a force in a downward direction by appropriately selecting the direction of the polarity of the magnet and the direction of the current flowing to the voice coil in the loudspeaker unit and the receiver speaker unit, Let him receive strength.

Fig. 3 is a block diagram showing an internal configuration of a cellular phone having a dual loudspeaker integrated with a receiver-loudspeaker according to the present invention, instead of a conventional receiver speaker (a receiver).

1, a high frequency amplifier 111, a transmission frequency synthesizing circuit 113, a reception frequency synthesizing circuit 112, a demodulator 114, a modulator 115, an audio processor 116, a control unit 117, A PCB circuit part 100 including a dual speaker selection switching part 140 for selectively controlling the operation of the speaker, an antenna 123 connected to the PCB circuit part, a dual speaker loudspeaker 140 integrated with the receiver according to the present invention ), A microphone 119, a keypad 120, and an LCD display 121. The difference from the conventional cellular phone is that a dual speaker 140 is used instead of a general receiver speaker and a dual speaker selection switching unit 130 for controlling the operation of the dual speaker is additionally provided in the PCB circuit.

The dual speaker selection switching section 130 selectively drives one of the loudspeaker section and the receiver speaker section of the dual speaker in accordance with the user's selection or opening of the folder (or flip).

As shown in FIG. 4, the dual speaker is mounted on the upper folder of the folder-type cellular phone, and the receiver speaker is arranged to face the inside of the folder. If the upper folder is opened, the user tries to make a close-contact call. Therefore, the selection switching unit turns on only the receiver speaker unit and turns off the loudspeaker unit in the switching (S) operation after detecting the opening of the folder 4A). Conversely, if the folder is closed, the user is trying to make a speakerphone call, so the loudspeaker unit is turned on and the receiver speaker unit is turned off (Fig. 4B). In order to do this, the dual speaker selection switching unit 130 or the control unit 117 must be able to detect whether the folder is opened or closed when the folder is opened or closed. The folder (or flip) And can be achieved by a suitable device.

The dual loudspeaker integrated with the receiver-loudspeaker according to the present invention is installed in a mobile communication terminal such as a cellular phone, and the receiver function and the loudspeaker function of the dual speaker are selected according to the folder opening and closing, .

In addition, by adopting the integrated dual speaker as the speaker of the cellular phone according to the present invention, the manufacturing cost can be reduced as compared with the conventional cellular phone having the speaker speaker and the external loudspeaker separately The size (volume) of the cellular phone handset can be greatly reduced.

Claims (5)

A first magnet (32) annularly fixed to one surface of the frame, a first voice coil (33) annularly arranged inside the first magnet, a second voice coil And a first diaphragm (34) connected to the coil and disposed between the other surface of the lid subframe and the fixed first magnet (34); A cylindrical receiver frame 41 disposed on the other side of the loudspeaker frame 31 and having a diameter smaller than that of the loudspeaker frame 41 and a second cylindrical shape fixed to the center of one surface of the inside of the receiver frame in a direction in which the first magnet is fixed, A second voice coil 43 connected to the second voice coil and disposed between the other surface of the receiver frame and the second magnet, a second voice coil 43 arranged to surround the second magnet, And a receiver speaker unit (40) composed of a diaphragm (44). The method according to claim 1, The louver frame 31 is formed as a closed frame having a cylindrical groove having a predetermined diameter at a lower portion thereof, and the receiver frame is a closed frame composed of the cylindrical groove and a cylindrical lid having a diameter larger than that of the groove and smaller than that of the loudspeaker , And the second magnet (42) and the second voice coil (43) are disposed inside the cylindrical groove. 3. The method according to claim 1 or 2, Wherein the second voice coil (43) and the second diaphragm (44) have diameters smaller than the first voice coil (33) and the first diaphragm (34), respectively. A PCB 100 including a high frequency amplifier 111, a transmission frequency synthesizing circuit 113, a reception frequency synthesizing circuit 112, a demodulator 114, a modulator 115, an audio processor 116 and a controller 117, In a mobile communication terminal including an antenna 123, a receiver speaker, a microphone 119, a keypad 120, and a housing A dual speaker (140) according to claim 1 mounted in place of the receiver speaker; And a dual speaker selection switching unit (130) included in the PCB for selectively driving one of a loudspeaker unit and a receiver speaker unit of the dual speaker. 5. The method of claim 4, The dual speaker selection switching unit 130 senses the opening and closing of one of the flip and the folder of the mobile communication terminal, Activates only the receiver speaker unit 40 when one of the flip and the folder of the mobile communication terminal is opened; And activates only the loudspeaker unit (30) when one of the flip and the folder of the mobile communication terminal is closed.

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