KR100600962B1 - Mobile telecommunications terminal - Google Patents

Abstract

The present invention relates to a mobile communication terminal, and in the present invention, a ground line, which is a main passage of a radio signal, and a filter for selectively shielding only a high frequency signal on a signal path of a ground portion connected to the ground line, are further disposed. In this way, the high frequency signal (radio signal) carrying the broadcast content can be normally input to the radio signal processing unit without undergoing an unnecessary grounding process, so that the signal is processed by the radio signal processing unit so that the earphone speaker (or speaker) It is possible to suppress the quality degradation of the broadcast content output to the minimum level.

In addition, in the present invention, a filter for selectively shielding only a high frequency signal is additionally disposed in each of the left and right audio signal connection lines and the microphone signal connection lines, which are main passages of the left and right audio signals and the microphone signal, and thereby, the radio signal By preventing the unnecessary occurrence of high frequency signals input to the processing unit to the audio input / output processing unit in advance, the audio input / output processing unit can easily free from the adverse effects of the high frequency signals (radio signals) carrying the broadcast contents and demand them. The low frequency audio signal and the microphone signal processing may be induced to perform a normal role.

Description

Mobile telecommunications terminal

1 is a block diagram conceptually illustrating an internal component of a mobile communication terminal according to the related art.

2 conceptually illustrates the appearance of a mobile communication terminal according to the present invention;

3 is a block diagram conceptually illustrating internal components of a mobile communication terminal according to the present invention;

Figure 4 is a simplified circuit diagram conceptually showing the arrangement of the ground cutoff filter and the inlet cutoff filter according to the present invention.

The present invention relates to a mobile communication terminal, and more particularly, a ground line, which is a main passage of a radio signal, and a filter for selectively shielding only a high frequency signal on a signal path of a ground portion connected to the ground line. In this way, the high frequency signal (radio signal) carrying the broadcast content can be normally input to the radio signal processing unit without undergoing an unnecessary grounding process, thereby processing the signal by the radio signal processing unit so that the earphone speaker (or speaker The present invention relates to a mobile communication terminal capable of suppressing a quality degradation of a broadcast content outputted at a minimum level.

Recently, with the rapid development of electric, electronic and communication related technologies, high-performance mobile communication terminals having a series of radio broadcasting transmission (reception / output) capabilities are also showing a wide development and distribution trend.

In general, in order to enjoy high quality digital contents such as, for example, FM radio broadcasting, using such a radio signal receiving / output type mobile communication terminal, it is possible to precisely receive a high frequency radio signal while keeping the size as small as possible. It is necessary to be able to antenna.

In the early stages of the spread of radio signal reception / output type mobile communication terminals, such antenna problem became a big obstacle, but recently, as technology that uses speaker type external accessories such as earphones is widely used as an antenna, This problem is also showing a quick resolution.

As shown in FIG. 1, under the radio signal receiving / output type mobile communication terminal 1 system according to the prior art, an audio signal (for example, a voice signal) received through the communication antenna 2 is a duplexer 3. Through a duplexer, a base-band part (5), an audio input / output processing unit (6), and the like, and take a mechanism to be output to the speaker (14). After passing through the input / output processing unit 6, the base band unit 5, the duplexer 3, etc., the mechanism output through the antenna 2 is taken.

In this case, between the duplexer 3 and the base band unit 5, various kinds of intermediate processing of the audio signal input from the outside to the mobile communication terminal 1 side or the audio signal output from the mobile communication terminal 1 side to the outside may be performed. Communication-related circuit parts 4 are arranged, and in this situation, the base band part 5 forms a series of signal connection relationships with the terminal control part 9, for example, via the logic interface part 8.

Under such a conventional mobile communication terminal 1 system, when a user inserts a speaker type external accessory, for example, the earphone 20 into a signal contact jack 13 of the terminal 1, the corresponding earphone 20 The signal input line 12a, 12b, 12c, and 10 described below are connected to each other through the audio input / output processor 6, the radio signal processor 7 and the like.

In this case, the insertion pin 28 which protrudes from the body 23 of the earphone 20 and is connected to the earphone speaker 22 through the connection line 21 is, for example, a microphone signal sector 27, left audio. The signal sector 26 (Reft audio signal sector), the right audio signal sector 25 (Light audio signal sector), the ground sector 24 and the like are combined. In this situation, each sector 24, 25, 26 and 27 are, for example, the audio input / output processing unit 6, the radio signal processing unit 7, and the like through the left and right audio signal connection lines 12a and 12c, the microphone signal connection line 12b, and the ground line 10. A signal connection structure is taken.

Of course, in this case, the ground line 10 has a structure in which the signal is connected to the ground unit 11 as well as the radio signal processor 7, thereby guiding the earphone 20 to achieve a signal stable ground structure. .

In this situation, when the radio signal R is transmitted from the outside and the corresponding radio signal R is received, the earphone 20 transmits the radio signal R to the ground sector 24 and the ground line. (10), etc., to transmit to the input port (7a) of the radio signal processing unit 7, after all, the radio signal processing unit 7 is transmitted from the outside, even under the situation that the separate radio antenna The radio signal R can be processed normally and outputted.

The radio signal processed by the radio signal processing unit 7 is according to the situation (for example, according to the user's terminal operation), the base band unit 5, the audio input / output processing unit 6, the left and right audio signal connection lines 12a. 12c), the left and right audio signal sectors 26 and 25, the connection line 21, and the like, undergo a process of being output to the speaker 22 for the earphone. In the end, the user utilizes the mobile communication terminal 1 In addition, high-quality radio broadcasting contents can be easily enjoyed.

However, under such a conventional system, as mentioned above, the ground line 10, which is the main passage of the radio signal R, has a structure in which the signal is connected not only to the radio signal processing unit 7 but also to the ground unit 11. As a result, unless a separate action is taken, the high frequency signal carrying the broadcast content (i.e., radio signal) is grounded by the grounding part 11 together with a normal low frequency signal which requires grounding. Will suffer.

Of course, when a large portion of the high frequency signal is grounded by the ground unit 11 together with the low frequency signal, the broadcast content is processed by the radio signal processing unit 7 and output to the earphone speaker 22 (or speaker). Due to the deterioration of signal sensitivity, the quality (sound quality) is inevitably largely impaired, and as a result, the user cannot normally enjoy high-quality radio broadcast contents that he / she wants.

Furthermore, under the conventional system, the left and right audio signal connection lines 12a and 12c and the microphone signal connection line 12b, which are main passages of the left and right audio signals and the microphone signal, and the ground line 10, which are the main passages of the radio signal, are provided. Since no separate shielding means is provided between them, radio frequency R of high frequency is unnecessarily introduced to the audio input / output processing unit 6 unless special measures are taken, and low frequency left and right audio signals And it has no choice but to adversely affect the flow of the microphone signal.

Of course, when the adverse effects of the high frequency radio signal R are continuously left without any measures, the radio signal reception / output type mobile communication terminal 1 not only causes a problem of deterioration of the broadcast content, but also the left and right audio signals and Even the problem of deterioration of the microphone signal can only be caused.

Accordingly, an object of the present invention is to additionally arrange a ground line which is a main passage of a radio signal, and a filter capable of selectively blocking only a high frequency signal on a signal path of a ground portion connected to the ground line. By inducing the radio frequency signal carrying the broadcast content (that is, the radio signal) to be normally input to the radio signal processing unit without undergoing an unnecessary grounding process, the signal is processed by the radio signal processing unit, and the earphone speaker (or speaker) is processed. This is to minimize the quality degradation of the output broadcast content.

Another object of the present invention is to add a filter that can selectively shield only the high-frequency signal in each of the left and right audio signal connection line and the microphone signal connection line which is the main passage of the left and right audio signal and the microphone signal, respectively, through the radio By preventing the unnecessary occurrence of the high frequency signal input to the signal processing unit to the audio input / output processing unit in advance, the audio input / output processing unit easily escapes from the adverse effects of the high frequency signal (that is, the radio signal) carrying the broadcast content. It is to induce the low frequency audio signal and microphone signal processing required by the user to perform normally.

Still other objects of the present invention will become more apparent from the following detailed description and the accompanying drawings.

In order to achieve the above object, in the present invention, a mobile communication terminal having a speaker type external accessory and a communication antenna capable of receiving a radio signal, the external audio signal introduced through the communication antenna A communication related circuit unit which processes a signal and outputs the signal to a receiver, and processes an audio signal introduced through the transmitter unit and outputs the external signal through the communication antenna; A terminal controller which collectively controls the communication-related circuit units; A radio signal processor configured to receive and process the radio signal by being selectively connected to the speaker type external accessory through a ground line in a signal connection state with the terminal controller; A ground part for selectively grounding the speaker type external accessory in a signal connection state with the ground line; Disclosed is a mobile communication terminal comprising a combination of a ground cut-off filter selectively blocking the inflow of the ground signal side of the radio signal in a state arranged on a connection path between the ground line and a ground portion.

Hereinafter, with reference to the accompanying drawings, a mobile communication terminal according to the present invention will be described in more detail.

As shown in FIG. 2, under the framework of a mobile communication terminal, for example, a radio signal receiving / output type mobile communication terminal 100 according to the present invention, a user may, for example, have a variety of functions such as earphones 200, headphones, a headset, and the like. By utilizing a variety of speaker type external accessories, it is easy to enjoy high-quality digital contents such as FM radio broadcasting.

In this case, the speaker type external accessory, for example, the earphone 200 has a configuration in which the body 203, the connection line 201, the earphone speaker 202, the insertion pin 208, etc. are combined, in this situation. In the connection line 201, detailed connection lines 201a, such as a microphone signal connection line, a left audio signal connection line, a right audio signal connection line, and a ground connection line, are bundled to form a structure.

Under such a structure, as illustrated in FIG. 3, an audio signal (eg, a voice signal) received through the communication antenna 101 may be a duplexer 102, a base band unit 111, an audio input / output processing unit 113, or the like. It takes a mechanism that is output to the receiver, for example, the speaker 116 through the audio signal input through the talker, for example, the microphone 115, the audio input / output processing unit 113, the base band unit 111 After passing through the duplexer 102, the mechanism output through the communication antenna 101 is taken.

In this case, between the duplexer 102 and the base band unit 111, an audio signal input from the outside (for example, a base station) to the mobile communication terminal 100 side or an audio signal output from the mobile communication terminal 1 side to the outside is intermediate. Various kinds of communication-related circuit units 103 are additionally disposed.

In this situation, the communication-related circuit unit, for example, the duplexer 102 plays a role of managing the input / output procedures of the audio signal, the control signal, and the data signal. The receiving amplifier 106 is a duplexer (external audio signal). When the signal is received through 102, the signal is compensated for and amplified. The detector 107 detects an amplified signal through the reception amplifier 106 and demodulates the corresponding audio signal. To serve as the output.

In addition, the modulator 105 modulates and outputs an audio signal input through the base band unit 111 into a transmission frequency signal, and the amplifying unit 103 is a signal modulated by the modulator 105. To amplify the transmission signal to the duplexer 102 to serve to deliver.

In addition, the mixer 108 serves to mix and output the control signal received through the duplexer 102 with the intermediate frequency signal supplied from the local oscillator (not shown), and the decoder 109 is a mixer ( The control signal of the high frequency output through the 108 to form a digital waveform, and the discriminating unit 110 compares the signal output through the decoder 109 with a unique address, and then compares the result of the comparison. It serves to deliver to the terminal control unit 117.

Of course, the specific configuration and function of the above-described communication-related circuit unit 103 may be variously modified depending on the situation.

In this case, as shown in the figure, the base band unit 111 is connected to the terminal control unit 117 to collectively control the previous communication-related circuit units 103, for example, via the logic interface unit 112. In this situation, the terminal control unit 117 has a structure in which the terminal control unit 117 communicates with the memory unit 118, whereby various pieces of information (eg, application applications) stored and managed by the memory unit 118 are formed. ) May be selectively output according to the signal processing situation of the communication-related circuit units 103 (eg, the base band unit), the keypad operation state of the user, and the like.

Here, the terminal control unit 117 transmits a series of update information to the display driver 119 when the information displayed on each display window is required, so that the information displayed on each display window 120 is new according to the situation. Will be updated quickly. In this case, the display driver 119 serves to externally display the operating states of the memory unit 118 and the communication circuit unit 103 under the control of the terminal controller 117 through each display window 120.

In this situation, when the user inserts the aforementioned speaker type external accessory, for example, the earphone 200 into the signal connection jack 114 of the terminal 100, the earphone 200 is connected to the signal connection lines 122a and 122b, Through the 122c and 121, the audio input / output processing unit 113, the radio signal processing unit 124, and the like are connected to each other.

In this case, while protruding from the body 203 of the earphone 200, through the preceding detailed connection line 201a: that is, the microphone signal connection line, the left audio signal connection line, the right audio signal connection line, the ground connection line, The insertion pin 208, which is connected to the earphone speaker 202 in signal form, is a combination of, for example, a microphone signal sector 207, a left audio signal sector 206, a right audio signal sector 205, a ground sector 204, and the like. In this situation, each of the sectors 204, 205, 206, and 207 has a second signal line, eg, left and right audio signal connection lines 122a and 122c, a microphone signal connection line 122b and a first signal line, eg, ground. The line 121 is connected to the audio input / output processor 113, the radio signal processor 124, and the like through a line 121.

Of course, in this case, the ground line 121 has a structure in which the signal is connected to the ground unit 123 as well as the radio signal processing unit 124, thereby guiding the earphone 200 to achieve a signal stable ground structure. .

At this time, the previous radio signal processing unit 124 has a structure that is connected to the signal to the terminal control unit 117 via the base band unit 111, in this situation, through the front ground line 121, earphone It is selectively connected to the signal 200, and performs the role of receiving and processing the radio signal (R), the front ground portion 123 is a signal connected to the ground line 121, the earphone 200 is optional Grounding is performed.

In addition, the audio input / output processing unit 113 has a structure in which a signal is connected to the microphone 115, the speaker 116, and the like in the state of being connected to the terminal control unit 117 via the base band unit 111. In addition, through the left and right audio signal connection line (122a, 122c), the microphone signal connection line (122b), etc., it takes a structure that is selectively connected to the earphone 200, in this situation to the radio signal processing unit 124 The radio signal or audio signal processed by each communication-related circuit unit 103 is processed through the microphone 115, the speaker 116, or the earphone 200.

In this situation, when the radio signal R is transmitted from the outside and the corresponding radio signal R is received, the earphone 200 transmits the radio signal R to the ground sector 204 and the ground line. Through the 121 and the like, the radio signal processor 124 is transmitted to the input port 124a. As a result, the radio signal processor 124 is transmitted from the outside even in a situation where a separate radio antenna is not mounted. The radio signal R can be processed normally and outputted.

The radio signal R input as described above is transformed into a low frequency audio signal by the radio signal processing unit 124, and then, for example, the base band unit 111 and the audio input according to a user's manipulation of the selection key 125. / Output processing unit 113, the left and right audio signal connection line (122a, 122c), the left and right audio signal sector (206, 205), the connection line 201, etc., the output to the speaker 202 for the earphone, and eventually The user can easily enjoy high-quality radio broadcast contents by utilizing the mobile communication terminal 100.

Under the system of the mobile communication terminal 100 according to the present invention, as shown in the drawing, the ground cutoff filter 131, preferably of the present invention, is formed on the connection path between the ground line 121 and the ground part 123. , High frequency cut-off filter is additionally placed.

In this case, as shown in FIG. 4, the ground cutoff filter 131 (high frequency cutoff filter), preferably, the inductor 131a has a ground of each signal flowing through the ground line 121 along arrows A2, A3, and the like. By passing the necessary low frequency signal to the ground part 123 side, and effectively blocking the radio signal processing unit 124 to the high-frequency signal, for example, the radio signal (R) flowing into the destination, as a result, In this case, the radio signal R flowing through the ground line 121 is induced to the ground unit 123 to be blocked. In this case, the inductor 131a forms, for example, a coil structure.

As described above, although the ground line, which is a main passage of the radio signal, is conventionally connected not only to the radio signal processing unit but also to the ground unit, no further action is taken. The high frequency signal carrying the (i.e., the radio signal) together with the normal low frequency signal that requires grounding has to suffer a serious problem that is grounded by the grounding part, so that the broadcast content output to the earphone speaker (or speaker) is Due to the deterioration of the signal sensitivity, the quality (sound quality) was inevitably impaired, and as a result, the user could not normally enjoy the high-quality radio broadcast content that he / she wanted.

However, in the present invention, in consideration of the fact that, as described above, the ground line 121, which is the main through-path of the radio signal R, is connected to the ground unit 123 as well as the radio signal processor 124, Take measures to additionally arrange a ground cut filter 131 that can selectively shield (block) only high-frequency signals on the signal path of the ground line 121 and the ground portion 123 connected to the ground line 121. Therefore, when the present invention is implemented, a high frequency signal carrying a broadcast content (ie, a radio signal) can be normally input to the radio signal processing unit 124 side without undergoing an unnecessary grounding process. In the implementation environment of the present invention, the broadcast content processed by the radio signal processor 124 and output to the earphone speaker 202 (or speaker) may be suppressed to a minimum level of unnecessary quality degradation. As a result, the user can normally enjoy the high quality radio broadcast content that he / she wants.

On the other hand, as described above, in the present invention, as well as taking measures to further arrange the ground cut filter 131 (high frequency cut filter) on the connection path between the ground line 121 and the ground portion 123, As shown in FIG. 3, an additional arrangement of the inlet cutoff filters 132, 133 and 134, preferably the high frequency cutoff filter, is also arranged on the left and right audio signal connection lines 122a and 122c and the microphone signal connection line 122b. Additional measures are taken.

At this time, as shown in Figure 4, each of the ground cut-off filter (132, 134, 133: high frequency cut-off filter) disposed in the serial (serial) to the left and right audio signal connection line (122a, 122c), the microphone signal connection line (122b), preferably The inductors 132a, 134a, and 133a are output to the earphone 200 side of the signals flowing through the left and right audio signal connection lines 122a and 122c and the microphone signal connection line 122b, for example, along the arrow A1 direction. A low frequency signal (e.g., a low frequency audio signal) is selectively passed through, and a high frequency signal that is unnecessarily introduced from the radio signal processor 124 side to the audio input / output processor 113 side, for example, the radio signal R, By effectively performing the selective blocking, as a result, the phenomenon that the radio signal R flowing through the ground line 121 flows into the audio input / output processing unit 113 side can be blocked at the source. And it performs the function of inducing the lock.

As mentioned above, in the prior art, since no separate shielding means is provided between the left and right audio signal connection line / microphone signal connection line and the ground line, which is the main through path of the radio signal, the radio signal of a high frequency is conventional. Inflow into the audio input / output processing unit has a great adverse effect on the flow of low-frequency left and right audio signals and microphone signals, and eventually, the terminal may additionally cause quality degradation problems of the left and right audio signals and the microphone signals.

However, in the present invention, in consideration of the occurrence of such a problem, as described above, each of the left and right audio signal connection lines 122a and 122c and the microphone signal connection line 122b, which are main penetration paths of the left and right audio signals and the microphone signal, respectively. Since measures to additionally arrange the inflow cutoff filters 132a, 134a, and 133a, which can selectively shield (block) only the high frequency signals, the high frequency input to the radio signal processor 124 is implemented when the present invention is implemented. The signal cannot be unnecessarily introduced to the audio input / output processing unit 113, and consequently, under the implementation environment of the present invention, the audio input / output processing unit 113 carries out a high frequency signal carrying a broadcast content (i.e., a radio). Easy to get away from the bad effects of the signal, and to perform the low frequency audio signal and microphone signal processing required by the user As a result, the terminal 100 can naturally avoid the problem of deterioration of the left and right audio signal and the microphone signal.

This invention can be variously modified depending on the situation.

For example, in the present invention, the above-described ground cutoff filter (inflow cutoff filter) may be a BP filter, a band stop filter, or an EMI filter (Electro-Magnetic Interference filter) in the inductor. It is possible to flexibly take a step to replace it. As another example, the present invention can flexibly take measures to deform the inductor from the previous coil type to a plate type (shielding plate), ring type (shielding ring), cylindrical type (shielding box) and the like.

As described in detail above, in the present invention, a ground line, which is a main passage of a radio signal, and a filter for selectively shielding only a high frequency signal on a signal path of a ground part connected to the ground line may be additionally disposed, thereby By inducing the radio frequency signal carrying the broadcast content (that is, the radio signal) to be normally input to the radio signal processing unit without undergoing an unnecessary grounding process, the signal is processed by the radio signal processing unit, and the earphone speaker (or speaker) is processed. The quality degradation of the output broadcast content can be suppressed to a minimum level.

In addition, in the present invention, a filter for selectively shielding only a high frequency signal is additionally disposed in each of the left and right audio signal connection lines and the microphone signal connection lines, which are main passages of the left and right audio signals and the microphone signal, and thereby, the radio signal By preventing the unnecessary inflow of high frequency signals input to the processing unit into the audio input / output processing unit in advance, the audio input / output processing unit is easily freed from the adverse effects of the high frequency signals (that is, radio signals) carrying the broadcast contents. It can be induced to perform the low-frequency audio signal and microphone signal processing that is required for the normal operation.

The present invention is not limited only to a mobile communication terminal, and shows an overall useful effect in various types of electronic devices using a speaker type external accessory as an antenna.

And, in the foregoing, specific embodiments of the present invention have been described and illustrated, but it is obvious that the present invention may be variously modified and implemented by those skilled in the art.

Such modified embodiments should not be understood individually from the technical spirit or point of view of the present invention and such modified embodiments should fall within the scope of the appended claims of the present invention.

Claims (4)

A mobile communication terminal having a speaker type external accessory capable of receiving a radio signal and an antenna for communication, Communication-related circuit units for processing an external audio signal introduced through the communication antenna and outputting the received audio signal to the receiver, and processing the audio signal introduced through the communication unit and outputting the external audio signal through the communication antenna; A terminal controller which collectively controls the communication-related circuit units; A radio signal processor configured to receive and process the radio signal by being selectively connected to the speaker type external accessory through a ground line in a signal connection state with the terminal controller; A ground part for selectively grounding the speaker type external accessory in a signal connection state with the ground line; And a ground cut-off filter for selectively blocking the inflow of the ground signal side of the radio signal in a state arranged on a connection path between the ground line and the ground part. The radio signal processor of claim 1, wherein the signal is connected to the terminal controller and the receiver and the receiver, and selectively connected to the speaker type external accessory through a left and right audio signal connection line and a microphone signal connection line. An audio input / output processing unit configured to input / output a processed radio signal or an audio signal processed by the communication related circuit units through the transmitter / receiver unit or a speaker type external accessory; The apparatus further comprises an inlet blocking filter for selectively blocking the inflow of the audio input / output processor side of the radio signal in a state of being disposed on a path of the left and right audio signal connection lines and the microphone signal connection line. Communication terminal. The mobile communication terminal of claim 1, wherein the ground cutoff filter or the inflow cutoff filter is a high frequency cutoff filter. The mobile communication terminal of claim 3, wherein the high frequency cutoff filter is an inductor.

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