KR101122088B1 - Mobile phone and control method thereof - Google Patents

Abstract

The mobile communication terminal according to the present invention comprises: a first body having a substrate on which a predetermined component for wireless communication is mounted; A second body coupled to one side of the first body and having a display unit for outputting predetermined information; A grounding body provided on one side of the first body or the second body and having a predetermined size connected to at least one of the substrate and the display unit; A ground control unit configured to selectively form a ground connection between at least one of the substrate and the display unit and the ground body; And a control unit which controls the ground control unit so that the ground connection is connected when high power radiation is generated during wireless communication and the ground connection is cut off when high power radiation is not generated. In other cases, the ground connection is cut off to improve wireless communication performance.

Description

Mobile communication terminal and its control method {MOBILE PHONE AND CONTROL METHOD THEREOF}

1 is a diagram illustrating a structure for grounding in a folding type terminal as a conventional mobile communication terminal.

2 is a schematic diagram showing a schematic configuration of a mobile communication terminal according to the present invention.

3 is a flowchart illustrating each control step of a control method of a mobile communication terminal according to the present invention.

<Description of Symbols Used in Drawings>

100: first body 111: substrate

112: display unit 120: grounding body

130: hinge 121: connecting line

200: second body 300: control unit

311: first ground control unit 312: second ground control unit

320: detection unit 330: switching switch

The present invention relates to a mobile communication terminal and a control method thereof, and more particularly, to a mobile communication terminal and a control method for improving wireless communication performance while reducing the influence of electromagnetic waves through grounding.

In general, a mobile communication terminal is a mobile phone or PDA which allows a user to conveniently carry and carry various types of information such as video, voice, and text with other users through wireless communication or to access a predetermined server to receive various services. And the like.

In the case of such mobile communication terminals, especially mobile phones, evolved from the initial bar type to the flip type, the folder type, and the slide type according to consumer demands and technology. come.

Since the mobile communication terminal communicates wirelessly, such as making a call or performing data communication, a lot of electromagnetic waves are generated through many electronic components and antennas mounted on the PCB therein, and especially when making a phone call. Since the user makes the mobile communication terminal very close to or in contact with the human body, there is a problem that the effect of electromagnetic waves to the user. Here, SAR is defined as a criterion for the degree of absorption of human body by electromagnetic waves. In the mobile communication terminal, the reduction of SAR has become one big problem to be solved.

In order to solve this problem, the electric field is distributed to the electronic parts inside the terminal by distributing the electric field (the unit of the electric field is V / m. It is possible to reduce the influence of electromagnetic waves. SAR = (σ * E ^ 2) / ρ, where σ is the conductivity (s / m), ρ is the tissue density (kg / m ^ 2), and E is the field strength (V / m). Since each represents the electric field dispersion, the electric field strength decreases and the SAR can be reduced.

1 illustrates a structure for grounding in a folding type terminal as a conventional mobile communication terminal. As shown in FIG. 1, the terminal main body 10 and one end of the terminal main body 10 are rotatable. A folder 20 to be combined is provided, and inside the terminal body 10, various electronic components are positioned, and a PCB 11 is provided to generate electromagnetic waves, and predetermined information is displayed inside the folder 20. An LCD 21 to be output is provided. Both the PCB 11 and the LCD 21 are devices that emit a considerable amount of electromagnetic waves. 22 is a window that allows the LCD 21 to be viewed from the outside.

In addition, the conventional mobile communication terminal is coupled to one side of the terminal main body 10 so that the hinge 20 rotates with respect to the terminal main body 10 and one side of the hinge 13. The conductor plate 12 of predetermined size is provided.

The PCB 11 or LCD 21 is electrically connected to the conductor plate 12 or the conductor plate 12 and the hinge 13 to be grounded, thereby reducing the field strength inside the terminal to reduce SAR. You can.

However, even when the terminal is closed or when the terminal is in use, the output power is not very high. For example, in a strong electric field or a medium medium electric field where the mobile communication environment is very good, a good enough transmission and reception is possible even if the output of the antenna is not high. Even when the user is busy, the SAR effect is not so high that the SAR is not a problem.

The present invention is to solve the above problems, an object of the present invention is to distinguish between the case of SAR and the case of SAR is not a problem when the terminal is closed or SAR is not a problem even when using the terminal It is to provide a mobile communication terminal and a control method for reducing the SAR value by ensuring that the ground connection is cut off to improve the radio performance, and the ground connection is made only when SAR is a problem.

According to an aspect of the present invention, there is provided a mobile communication terminal comprising: a first body having a substrate on which a predetermined component for wireless communication is mounted; A second body coupled to one side of the first body and having a display unit for outputting predetermined information; A grounding body provided on one side of the first body or the second body and having a predetermined size connected to at least one of the substrate and the display unit; A ground control unit configured to selectively form a ground connection between at least one of the substrate and the display unit and the ground body; And a control unit which controls the ground control unit so that the ground connection is connected when the high output radiation is made during wireless communication and the ground connection is blocked when the high output radiation is not generated.

The apparatus may further include a detector connected to the controller to detect whether radiation of a high power is generated during wireless communication of the user, so that the controller operates according to a detection result of the detector.

The apparatus may further include an opening and closing switch installed on the first body or the second body and connected to the control unit to detect opening and closing of the second body with respect to the first body. It characterized in that the control unit is operated.

In addition, the ground control unit, characterized in that it comprises a first ground control unit for regulating the ground connection of the substrate and the ground body, and a second ground control unit for regulating the ground connection of the display unit and the ground body. .

In addition, the second body with respect to the first body is rotatable further includes a hinge including a conductor in all or part thereof, so that the grounding performance and the conductor portion of the hinge to improve the grounding performance It is characterized by one.

On the other hand, the control method of a mobile communication terminal according to the present invention, (A) determining whether the mobile communication terminal in a wireless communication state; (B) when in a wireless communication state, determining whether high power radiation occurs; And (C) at least one of the substrate and the display unit is grounded to the ground when the high output radiation is generated.

In addition, when the high output radiation is not made in the step (B), the substrate and the display unit is characterized in that it comprises the step of blocking the ground connection with the ground body.

In addition, in the step (A), the substrate and the display unit is characterized in that it comprises the step of blocking the ground connection with the grounding body.

Hereinafter, a preferred embodiment of a mobile communication terminal according to the present invention will be described with reference to the drawings.

2 is a schematic diagram showing a schematic configuration of a mobile communication terminal according to the present invention, and FIG. 3 is a flowchart showing each control step of the control method of the mobile communication terminal according to the present invention.

As shown in FIG. 2, an embodiment of a mobile communication terminal according to the present invention is illustrated with respect to a case of a folding type mobile communication terminal, in which a first body 100 in which a substrate 111 on which predetermined components are mounted is embedded. And a second body 200 which is rotatably coupled to one end of the first body 100 and includes a display unit 112 for outputting image information. Reference numeral 210 denotes a window.

One side of the first body 100 is provided with a grounding body 120 including a conductor of a predetermined size and embedded in the substrate 111 and the second body 200 embedded in the first body 100. Each of the display units 112 is electrically connected to the ground body 120. The grounding body 120 may be connected to a general conductive wire or various types of grounding wires, or may be a FPCB (Flecxible Printed Circuit Board). Reference numeral 121 shown in FIG. 2 represents a connection line such as a conductive line or an FPCB.

The grounding body 120 may also be in contact with the hinge 130, the hinge 130 is a part or all of which is formed of a conductor and the portion formed of the conductor and the grounding body 120 is in contact desirable.

On the other hand, the ground body 120 has been disclosed an embodiment to be provided on one side of the first body 100, it is also possible to be provided on the second body and the first body 100 and the second body ( It is also possible to be provided in both 200). In addition, only the grounding body 120 and the substrate 111 may be connected, or only the grounding body 120 and the display unit 112 may be connected to each other.

As shown in FIG. 2, the mobile communication terminal according to the present invention is provided with ground control units 311 and 312 on the connection line 121 and a control unit 300 for controlling the ground control units 311 and 312 is connected. Take

The ground control unit (311, 312) serves to selectively make the electrical connection of the connecting line 121, a general switch may be used or can be implemented using a diode, SPDT (Single-Pole Double-Throw) Or as a switch such as SPST (Single-Pole Single-Throw). That is, by installing a kind of ON / OFF switch in the middle of the connection line 121 connected to the substrate 111 or the display unit 112 to connect or disconnect the connection line 121 according to the signal of the control unit 300 to control the grounding. You can make this possible.

On the other hand, the mobile communication terminal according to the present invention shown in Figure 2 is the opening and closing switch 330 for detecting the opening and closing of the second body 200 with respect to the first body 100, and whether the high power in the wireless communication is detected It is configured to include a detector 320 for detecting whether or not. The opening / closing switch 330 and the detection unit 320 are also connected to the control unit 300 and controlled while exchanging a predetermined signal with the control unit 300.

Here, the opening and closing switch 330 is a switch for detecting the opening or closing of the terminal can be implemented as various switches or elements such as a flip switch, a hall element, or a reed switch. In addition, the detection unit 320 may be implemented by a high power detection (HDET) circuit as a device for detecting whether a high output of a predetermined output or more appears.

As shown in FIG. 2, the ground control units 311 and 312 may be in contact with the display unit 112 and the first ground control unit 311 electrically connecting or blocking the substrate 111 and the ground body 120. And a second ground control unit 312 electrically connecting or blocking the sieve 120. That is, it is possible to install one ground control unit on the connection line connecting any one of the substrate 111 and the display unit 112 and the ground body 120, but if the ground of both the substrate and the display unit is very important As shown in FIG. 2, the ground control unit may be installed for both the substrate and the display unit.

On the other hand, the larger the size of the grounding body 120, the grounding performance is improved, but there is a limit to increasing the size of the grounding body 120, the hinge 130 having a portion made of a conductor grounding ( By installing in contact with 120, the grounding performance can be further improved.

The operation of the mobile communication terminal according to the present invention will be described with reference to FIG.

When the user closes the terminal and does not perform wireless communication (telephone call or data communication, etc.), the controller 300 controls the ground adjusting units 311 and 312 so that the substrate 111 and the display unit 112 are grounded ( The connection with 120 is cut off, that is, not grounded to the grounding body 120 so as to increase the wireless call reception rate.

If the user opens the terminal, the opening and closing switch 330 detects the opening of the terminal and sends a signal to the control unit 300 and the control unit 300 determines whether the high output is detected by the detector 320. In other words, even if the terminal is open, if the wireless communication such as a telephone call is not yet performed, SAR is not a problem, and thus the ground connection is continuously blocked.

If the user makes a phone call through the terminal, electromagnetic waves of a certain output are radiated through the antenna, and in the case of a strong field depending on whether the region is a strong field or a weak field, even if the antenna radiation output is weak, the wireless performance is good enough. However, in the case of weak electric field, the antenna has to emit high power to show sufficient performance. In this case, the electromagnetic wave is generated very much and the SAR value is high. .

Therefore, the controller 300 determines whether the high output is detected by the detector 320, and if the high output is detected, the control unit 300 controls the ground adjusting units 311 and 312 so that the substrate 111 and the display 112 are connected to the ground body 120. Or grounded by being connected to the grounding body 120 and the hinge 130 to reduce the SAR value.

This configuration is applicable to all types of terminals that are grounded as well as the folding terminal shown in FIG. For example, in the case of a slide type terminal, a detector for detecting a high output is installed inside the terminal, and a ground controller is installed on a ground line such as a PCB or an FPCB. When the controller detects a high output at the detector, the ground controller is connected to the ground. In order to achieve this, the reduction of SAR and the improvement of radio performance can be achieved.

Meanwhile, each control step will be described with reference to a flowchart of a method for controlling a mobile communication terminal according to the present invention shown in FIG. 3.

The open / close switch detects the opening or closing of the terminal to determine whether the terminal is open or closed (S10). If the terminal is closed, the ground control unit blocks the ground connection to improve the wireless performance (S11).

If the terminal is in an open state, the controller determines whether the user is using wireless communication, that is, whether or not a telephone call is made (S20). If it is not in a wireless communication state such as a telephone call, step S11 is performed. If the user is currently on the phone call, the controller determines whether a high power is detected in the detector (S30).

If the high power is not detected in the terminal, the controller performs step S11. In this case, since the SAR number is rarely a problem, the focus is on better radio communication performance by cutting off the ground.

On the other hand, if the control unit detects a high output through the detection unit in step S30, the control unit reduces the SAR value by controlling the ground control unit to make a ground connection (S31).

By repeating such a series of processes, the mobile communication terminal can be grounded only when a high output with SAR is detected, and improves wireless communication performance by cutting off the ground connection when a high output without SAR is detected.

The mobile communication terminal and the control method according to the present invention having the above characteristics are such that the ground connection is cut off when no high power is detected in the terminal even if the wireless communication is not performed through the terminal and even if the wireless communication is performed for any reason. In this case, the wireless communication performance is improved, and when a high output is detected in the terminal and the SAR is a problem, the ground connection is made to reduce the SAR value, thereby providing an optimized mobile communication environment for the user.

Claims (12)

A main body including a circuit board and a display unit on which components for wireless communication are mounted; A grounding ground connected to at least one of the circuit board and the display unit; At least one ground control unit configured to selectively connect a ground connection between at least one of the circuit board and the display unit and the ground body; And And a controller configured to control the ground controller to connect at least one of the circuit board and the display unit to the ground when the mobile communication terminal generates high power radiation during wireless communication. The method of claim 1, wherein the main body, A first body on which the circuit board is mounted; And And a second body provided with the display unit, the second body being opened and closed with respect to the first body. The method of claim 1, wherein the main body, A first body provided with the circuit board and the display unit; And And a second body opened and closed with respect to the first body. The method according to claim 1, The main body is a mobile communication terminal, characterized in that formed of a single body (single body) provided with the circuit board and the display unit. The method according to claim 2 or 3, And a hinge part configured to allow the second body to be rotatable with respect to the first body, including a conductor in whole or in part, and connected to the grounding body. delete delete The method according to claim 1, Further comprising: a detector for detecting whether high-power radiation occurs during the wireless communication, And when the occurrence of the high output radiation is detected through the detector, the controller controls the ground controller to connect at least one of the circuit board and the display to the ground. The method of claim 2, wherein the main body, A detector for detecting whether high power radiation is generated according to wireless communication in the circuit board; And And an opening / closing switch installed on one of the first and second bodies to sense opening and closing of the second body with respect to the first body. The control unit, when it is detected that the second body for the first body is opened and closed through the opening and closing switch, and if it is detected that the high output radiation is generated through the detection unit, the ground control unit of the circuit board and the display unit And at least one ground connection to the grounding body. Determining whether the mobile communication terminal is in a wireless communication state; Determining whether high output radiation occurs in the wireless communication state; And And grounding the at least one of the circuit board and the display unit in the terminal and the ground when the high output radiation is generated. The method of claim 10, Blocking the ground connection between the circuit board and the display unit and the ground when the high output radiation is not generated. The method of claim 10, Blocking the ground connection between the circuit board and the display unit and the ground body when the wireless communication state is not in the wireless communication state.

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