KR100692000B1 - Mobile Communication Terminal for inspection of abnormal current and Diagnosis Method of abnormality using the same - Google Patents

Abstract

The present invention relates to a mobile communication terminal having an abnormal current test function for detecting an abnormal part by detecting an abnormal current and informing a user according to the state of the mobile communication terminal, that is, the current operation mode of the mobile communication terminal, and a method for diagnosing the abnormality using the same. As a result, the mobile communication terminal can be more effectively managed.

The present invention for achieving this purpose, the function to perform a function for performing a mobile communication with the outside, the current detector for detecting a current applied from the power supply to the functional unit and the function of the control function, And a controller which determines whether the current detected by the current detector is an abnormal current, sets the abnormal current mode, and examines the cause of the abnormal current.

Mobile communication terminal, fault current, over current, diagnosis, protection circuit

Description

Mobile communication terminal with fault current inspection function and fault diagnosis method using same {Mobile Communication Terminal for inspection of abnormal current and Diagnosis Method of abnormality using the same}

1 is a view showing the structure of a mobile communication terminal having a conventional protection circuit.

2 is a view for explaining a conventional abnormal current prevention method.

3 is a diagram illustrating a structure of a mobile communication terminal having an abnormal current test function of the present invention.

4 is a diagram illustrating an example of an abnormal current determination criterion according to a state of a mobile communication terminal of the present invention.

5A to 5B are diagrams showing examples of abnormal operation determination criteria for respective parts of the mobile communication terminal of the present invention.

6 is a diagram illustrating a fault diagnosis method using a mobile communication terminal having a fault current checking function of the present invention.

7 is a view for explaining an example of step S601 of FIG.

8 is a view for explaining an example of the step S604 of FIG.

<Explanation of symbols for the main parts of the drawings>

300: control unit 310: function unit

311: transmitting unit 312: duplexer

313: receiving unit 314: audio output unit

315: display portion 316: memory portion

317: command input unit 318: voice input unit

320: protection circuit unit 330: current detection unit

The present invention relates to a mobile communication terminal, and more particularly, a mobile communication terminal having an abnormal current test function for detecting an abnormal part by detecting an abnormal current according to a state of the mobile communication terminal and informing a user, and a method for diagnosing the abnormality using the same. It is about.

A general mobile communication terminal uses a battery to supply power for performing mobile communication. Such batteries are widely used today because of their excellent portability. However, a mobile communication terminal using such a battery has a possibility of causing an electrical damage by supplying excessive current from the battery due to a hardware problem. As such, when the battery generates excessive current more than necessary to supply the mobile communication terminal, the circuit parts of the mobile communication terminal are damaged, such as burning.

Accordingly, in the conventional mobile communication terminal, a protection circuit is provided to block the supply of the abnormal current from the battery, i.e., the excessive current required, to prevent electrical damage to the mobile terminal due to the abnormal current. Looking at the structure of a conventional mobile communication terminal having such a protection circuit as shown in FIG.

1 is a view showing the structure of a mobile communication terminal having a conventional protection circuit. As shown, a conventional mobile communication terminal having a protection circuit includes a control unit 100, a function unit 110, and a protection circuit unit 120.

The function unit 110 includes a transmitter 111, a receiver 113, a duplexer 112, and an audio output unit 114. The display unit 115 includes a memory unit 116, a command input unit 117, and a voice input unit 118. The function unit 110 performs various functions required for mobile communication under the control of the controller 100.

The protection circuit unit 120 protects the mobile communication terminal from electrical damage by cutting off the current supplied when the current of the power supplied from the battery is greater than or equal to a predetermined value (above current), for example, 2 A (amperes) or more.

Looking at the method for preventing the abnormal current in the conventional mobile communication terminal as shown in FIG.

2 is a view for explaining a conventional abnormal current prevention method. As shown, in the conventional abnormal current prevention method, first, when power is supplied from the battery (S200), the protection circuit unit determines whether the abnormal current is supplied, that is, whether the current of the power supplied from the battery is the abnormal current (S201). . Here, the abnormal current means a current higher than or equal to a predetermined value, and for example, when the current exceeds 2 A, the abnormal current is determined as the abnormal current.

As a result of the determination in step S201, when the abnormal current is supplied, the power supplied from the battery is cut off (S202). Here, the method of cutting off the power is, for example, a method of opening a switch installed in a path to which power is applied from the battery.

In this way, conventionally, the abnormal current supplied from the battery is cut off to protect the mobile communication terminal from electrical damage.

However, such an abnormal current blocking method can effectively block a current of a predetermined value or more, for example, a current of 2A or more, but has a problem in that a current of less than that cannot be managed. In other words, when the protection circuit section is set to cut off a current of 2 A or more, both the current of 1.9 A and the current of 1 A are equally passed. Therefore, abnormal current below 2A cannot be blocked or detected. For example, when the mobile communication terminal is currently waiting for reception with the display unit turned off, only a relatively small amount of power, that is, a relatively small amount of current, is required as compared with the call. In this case, if only 0.5A of current is required, if 1.5A of current flows, 1.0A of current is unnecessarily wasted. This is because the current cannot be blocked by the protection circuit because it is not an abnormal current that the protection circuit can detect.

In this case, the abnormal current is determined and blocked only by the magnitude of the current applied to the entire mobile communication terminal. That is, although the magnitude of the current applied to the entire mobile communication terminal can be determined, when a fault occurs in a predetermined part of the mobile communication terminal, for example, the transmitter, the receiver, or the display unit, an abnormal current flows to any part of the mobile communication terminal. It is not known whether abnormal current flows.

In order to solve the above problems, the present invention provides a mobile communication terminal having an abnormal current test function for detecting an abnormal current for each state of the mobile communication terminal so that a user can determine whether an abnormal current is generated, and an error diagnosis method using the same. The purpose is to provide.

In addition, an object of the present invention is to enable the user to detect the abnormal current for each part of the mobile communication terminal.

The present invention for achieving this purpose, the function to perform a function for performing a mobile communication with the outside, the current detector for detecting a current applied from the power supply to the functional unit and the function of the control function, And a controller which determines whether the current detected by the current detector is an abnormal current, sets the abnormal current mode, and examines the cause of the abnormal current.

The current detection unit is characterized in that it comprises a current detection resistor.

The current detection resistor is characterized by having a resistance value of 0.001Ω or more and 0.01Ω or less.

One end of the current detecting resistor is connected in common with the control unit and the function unit, and the other end is connected in common with the control unit and the power supply unit.

And a protection circuit unit for blocking an overcurrent between the other end of the current detection resistor and the power supply unit.

The controller may measure a current flowing through the current detector by using a voltage difference between voltages across the current detector and a resistance value of the current detector.

The controller may detect an abnormal current by comparing the measured current flowing through the current detector with a preset abnormal current determination criterion.

The abnormal current determination criterion is determined according to the current flowing through the current detection unit for each operating state of the functional unit.

The controller may be configured to search for which part of the functional unit is generated based on the abnormal operation determination criteria set in advance when detecting the abnormal current.

The abnormal operation determination criterion may be determined according to a difference between a current flowing through the current detector when the whole of the functional unit is driven and a current flowing through the current detector when a part of the functional unit is driven.

In addition, the present invention for achieving the above object, the current detection step of the control unit detects the current applied to the functional unit through the current detection unit, and the abnormal current determination criteria predetermined by the control unit whether the current detected in the current detection step is abnormal current The abnormal current determination step of determining according to the present invention, and the abnormal current cause search step of finding a cause portion of the abnormal current generation under the control of the controller when the detected current is the abnormal current.

An abnormal current detection display step of displaying the detection of the abnormal current on the display unit is further included between the abnormal current determination step and the abnormal current cause search step.

The method may further include an abnormal current cause display step of displaying the abnormal current cause searched by the control unit of the controller after the abnormal current cause search step.

The abnormal current determination step includes an operation mode determination step of determining an operation mode of the mobile communication terminal, a current detection step of detecting a current flowing through the current detection unit in the mode determined in the operation mode determination step, and a detection in the current detection step. And comparing the current with a preset abnormal current determination criterion to determine whether the current detected in the current detecting step is an abnormal current.

The abnormal current cause detection step may include: an overall current detection step of driving the entire function unit to detect a current flowing through the current detection unit when the entire function unit is driven, and blocking each part included in the function unit one by one; The breaking current detected in the partial breaking current detection step is abnormal by comparing the partial breaking current detection step of detecting current flowing through the current detection unit and the current detected in the partial breaking current detection step with a preset abnormal operation determination criterion. And an abnormal operation cause determining step of determining a part of the functional unit that is blocked at the time when the abnormal current determined in the abnormal operation comparison determination step is detected as the abnormal operation cause. do.

Hereinafter, a mobile communication terminal having an abnormal current test function and an abnormality diagnosis method using the same will be described in detail with reference to the accompanying drawings.

3 is a view showing the structure of a mobile communication terminal having an abnormal current test function of the present invention. As shown, the mobile communication terminal having an abnormal current test function of the present invention includes a control unit 300, a function unit 310, a protection circuit unit 320 and a current detection unit 330. The mobile communication terminal having such a configuration operates by receiving power from a predetermined power supply unit, for example, a battery.

The function unit 310 may include a transmitter 311, a duplexer 312, a receiver 313, a voice output unit 314, a display unit 315, a memory unit 316, a command input unit 317, and a voice input unit 318. ).

The transmitter 311 transmits an audio, video or data signal to the outside through an antenna.

The receiver 313 receives an audio, video or data signal from the outside through an antenna.

The duplexer 312 selects a path of a signal transmitted and received through an antenna.

The voice output unit 314 is composed of a voice output means such as a speaker, and outputs a voice signal so that a user can listen.

The display unit 315 is preferably a flat panel display device such as an LCD (Liquid Crystal Display) in consideration of the size of the mobile communication terminal, and displays a text or an image on the screen. In addition, it is displayed for the user to check whether an abnormal current has occurred, and also displays an abnormal part.

The memory unit 316 stores information such as a predetermined program for performing mobile communication. In addition, information about a predetermined criterion for determining an abnormal current is stored. For example, information such as an abnormal current judgment criterion and an abnormal operation judgment criterion is stored.

The command input unit 317 is composed of a command input means such as a predetermined keypad, and has various keys for inputting a predetermined control command for transmitting and receiving an audio, video or data signal.

The voice input unit 318 is composed of voice input means such as a microphone and converts external voice into an electric voice signal.

The protection circuit unit 320 cuts off the power supply from the battery when the current of the power supplied from the power supply unit, for example, the battery, is higher than or equal to a predetermined value, for example, 2A or more.

The current detector 330 includes a current detection resistor having a predetermined resistance value connected between the protection circuit 320 and the functional unit 310 described above. One end of the current detector 330 is commonly connected to the power supply unit, that is, the battery and the controller 300, and the other end is commonly connected to the function unit 310 and the controller 300. In this case, it is preferable that a protection circuit unit 320 is further included between one end of the current detector 330 and the battery to block the overcurrent. Here, the resistance for current detection has a resistance value of 0.01 Ω or less, more preferably 0.001 Ω or more and 0.01 Ω or less. The reason why the above-described current detecting resistor has a relatively small resistance value of 0.01? Or less is for reducing the voltage drop caused by the current detecting resistor. For example, if the mobile communication terminal is using a current of 1A, if the current detection resistance is 0.01Ω, the voltage drop by the current detection resistor is 0.01V, which does not significantly affect the operation of the mobile communication terminal.

The controller 300 controls the transmission and reception of audio, video or data signals, calculates the magnitude of the current supplied by the power supply, that is, the voltage of the power supplied from the battery, and compares the calculated current with a preset reference current. Therefore, it is judged that abnormal current is applied when it exceeds the predetermined standard. In addition, when an abnormal current is applied, each part of the functional unit 310 is inspected to determine which part is caused by an abnormal current. That is, the cause of the abnormal current is determined. In this case, the control unit 300 is preferably a mobile station modem (MSM) in the case of the code division multiple access (CDMA) method. Since the aforementioned MSM is widely used in CDMA and a processor, detailed description of the MSM will be omitted.

When a mobile communication terminal having such a configuration receives an audio, video or data signal from the outside, the receiving unit 313 passes the duplexer 312 through the antenna under the control of the control unit 300 and receives the audio, video or data from the outside. When the data signal is received, the received audio signal is output so that the audio output unit 314 can be listened to by the user under the control of the controller 300, and an image signal, for example, a text, is controlled under the control of the controller 300. The display unit 315 displays. In addition, the memory unit 316 stores a data signal such as a predetermined program under the control of the controller 300. In contrast, when a predetermined voice, video or data signal is transmitted, when a user inputs a predetermined text through the command input unit 317 or inputs a predetermined voice through the voice input unit 318, the control unit 300 controls the control unit 300. The transmitter 311 transmits the text or voice input by the user to the outside through an antenna.

In addition, the mobile communication terminal having such a configuration prevents electric damage by blocking current supply from the battery by the protection circuit unit 320 when a predetermined current, for example, 2A or more is supplied from the battery.

In addition, when a battery is connected to the mobile communication terminal having such a configuration, power of the battery is supplied to the functional unit 310 and the control unit 300 via the protection circuit unit 320. In this case, when the control unit 300 is an MSM, the power passing through the protection circuit unit 320 is preferably applied to the ADC (Analog to Digital Converter) port of the control unit 300. When power is applied to the ADC port, the controller 300 checks the magnitude of the voltage of the applied power. Here, the power applied from the protection circuit unit 320 to the functional unit 310 passes through the current detection unit 330 made of a current detection resistor having a predetermined resistance value. The protection circuit unit 320 and the current detector 330 and the current detector 330 and the function unit 310 are connected to the controller 300, respectively. That is, the controller 300 is supplied with power of the battery that has passed through the protection circuit unit 320 and power of the battery that has passed through the protection circuit unit 320 and the current detector 330. Accordingly, the control unit 300 knows both the voltage V1 between the protection circuit unit 320 and the current detection unit 330 and the voltage V2 between the current detection unit 330 and the function unit 310, and thus, the two voltages V1. The magnitude of the current supplied from the battery is calculated from the difference between and V2 and the resistance value of the preset current detector 330. Based on the magnitude of the current, it is determined whether an abnormal current is generated according to the state of the current mobile communication terminal, and the mobile communication terminal is set to the abnormal current mode according to the determination result.

The abnormal current determination criterion for setting the abnormal current mode is set in advance and stored in the memory unit 316. Herein, an example of an abnormal current determination standard of the mobile communication terminal will be described with reference to FIG. 4. The figures shown in FIG. 4 here are just one example and are not fixed to these figures.

For example, when power is applied when the mobile communication terminal is in a reception standby state and the backlight of the display unit 315 is turned off, the controller 300 controls the voltages at both ends of the current detector 330. That is, the voltage supplied from the battery calculates the magnitude of the current using the voltage difference between V1 and V2 and the resistance of the current detector 330. When the calculated current is 200 mA or more, the controller 300 indicates that an abnormal current flows. ) Determines and sets the mobile communication terminal to the abnormal current mode.

Similarly, when a current of 300 mA or more is supplied when the mobile communication terminal is in a standby state and at the same time the backlight is turned on, the mobile terminal is set to the abnormal current mode. If the mobile terminal is in a call state and the backlight is turned off at the same time, the current is set to the abnormal current mode when 400 mA or more is supplied. If the mobile terminal is in a call state and the backlight is turned off at the same time, the current is 500 mA or more. Is set to the abnormal current mode when supplied, and is set to the abnormal current mode when a current of 600 mA or more is supplied when a predetermined game program is used.

In this way, it is to determine whether the abnormal current flows by checking the current supplied in a state where a criterion for determining the abnormal current according to various situations is prepared.

In addition, after the mobile communication terminal is set to the abnormal current mode, it checks and diagnoses each part to determine which part of the mobile communication terminal generates an abnormal current. In this case, when the occurrence of the abnormal current is found, the abnormal operation judgment criteria are set in advance for each part, and each part is checked one by one to find the abnormal current generating part. The abnormal operation determination criteria for each part will be described with reference to FIGS. 5A to 5B. The figures shown here in FIGS. 5A-5B are one example and are not fixed to these figures first.

For example, when the functional unit 310 is entirely turned on, the current detected by the current detector 330 is Ia, and the state in which the transmitter 311 is turned off in the entire function unit 310, that is, the transmitter ( It is assumed that the current detected by the current detector 330 is Ib in the state where the current flowing to 311 is blocked. Here, when the difference between Ia and Ib, that is, the value of Ia-Ib is 500 mA or more, it is determined that an abnormal current is generated due to an error of the transmitter 311. That is, it is determined that the transmitter 311 causes abnormal operation.

Similarly, it is assumed that the current detected by the current detector 330 is Ic in a state in which the receiver 313 is turned off in the whole of the functional unit 310, that is, the current flowing to the receiver 313 is cut off, and Ia. When the value of -Ic is 100 mA or more, it is determined that an abnormal current is generated due to an abnormality of the receiving unit 313, and the other part of the display unit 315, the audio output unit 314, etc. is also checked in the same manner. do.

After checking whether or not an abnormal current flows, a message indicating that an abnormal current has been detected is displayed on the display unit 315 so that the user can check the presence or absence of an abnormal current under the control of the controller 300. After the abnormal current is checked, the display unit 315 displays a portion where an abnormality is found or whether or not the abnormal current is detected.

Looking at the method for checking the abnormal current using the mobile communication terminal as shown in FIG.

6 is a view for explaining a method of diagnosing an abnormality using a mobile communication terminal having an abnormal current test function of the present invention. As shown, the abnormality diagnosis method of the present invention, first, when the power is applied from the battery (S600), the control unit is a voltage of both ends of the current detector, that is, the current flowing through the current detector to the resistance value of V1 and V2 and the current detector, That is, the current supplied from the battery is detected. In this case, the method of checking the current flowing in the current detector includes calculating the current flowing in the current detector by dividing the difference between V1 and V2 by the resistance value of the current detector. In operation S601, the controller determines whether the current is abnormal by comparing the detected current with a preset abnormal current determination criterion. A method of determining the abnormal current in step S601 will be described in more detail with reference to FIG. 7 as follows.

The abnormal current determination method includes an operation mode determination step (S70) for determining an operation mode of the mobile communication terminal, a current detection step (S71) for detecting a current flowing through the current detector in the mode determined in the operation mode determination step, and a current detection step. An abnormal current reference comparison determination step (S72) of comparing the current detected by the abnormal current determination criterion to determine whether the current detected in the current detection step is an abnormal current is included.

Here, the operation mode determination step (S70) determines which mode of the mobile communication terminal is currently operating. As a result, the current operation mode of each mobile communication terminal, for example, the current supplied according to the state in which the mobile communication terminal is presently detected. For example, it is determined whether the mobile communication terminal is in a reception standby state and at the same time the backlight of the display unit is turned off (S700).

As a result of the determination in step S700, when the mobile communication terminal is in the reception standby state and the backlight of the display unit is not off at the same time, it is determined whether the mobile communication terminal is in the reception standby state and the backlight unit of the display unit is on (S703).

As a result of the determination in step S703, when the mobile communication terminal is in a reception standby state and the backlight of the display unit is not turned on at the same time, it is determined whether the mobile communication terminal is in a call state and the backlight of the display unit is turned off (S706).

As a result of the determination in step S706, when the mobile communication terminal is in a call state and the display unit is not in the off state at the same time, the controller determines whether the mobile communication terminal is in the call state and at the same time the backlight in the display unit is on (S709).

As described above, in the operation mode determination step (S70), it is determined in which mode the mobile communication terminal is currently operating.

After determining the operation mode of the mobile communication terminal in step S70, the current flowing through the current detector for each operation mode is detected (S71).

The current detecting step S71 includes step S701, step S704, step S707, and step S710. For example, when it is determined in step S700 that the mobile communication terminal is in a reception standby state and the backlight of the display unit is turned off, the controller detects a current flowing in the current detection unit (S701).

As a result of the determination in step S703, when the mobile communication terminal is in the reception standby state and at the same time the backlight of the display unit is turned on, the controller detects a current flowing in the current detection unit (S704).

As a result of the determination in step S706, when the mobile communication terminal is in a call state and at the same time the backlight of the display unit is turned off, the controller detects the magnitude of the current flowing in the current detection unit (S707).

As a result of the determination in step S709, when the mobile communication terminal is in a call state and at the same time the backlight of the display unit is turned on, the controller detects the magnitude of the current flowing in the current detector (S710).

As described above, the current detection step S71 detects the current flowing through the current detector in each operation mode of the mobile communication terminal.

The controller determines whether the current detected in the current detection step S71 is an abnormal current in the abnormal current reference comparison determination step S72, and the controller compares the current detected in the detection step with a preset abnormal current determination criterion. It is determined whether the current detected in the current detection step is an abnormal current.

In step S72, it is determined whether the current detected in steps S701, S704, S707, and S710 is an abnormal current. For example, as in the case of Figure 4 it is determined whether the current detected in step S701 exceeds 200mA (S702).

As a result of the determination in step S702, when the current detected in step S701 exceeds 200 mA, the flow proceeds to step S602 in which the mobile communication terminal is set to the abnormal current mode.

In addition, when it is determined whether the current detected in step S704 exceeds 300 mA (S705), the process proceeds to step S602 in which the mobile communication terminal is set to the abnormal current mode.

In addition, if it is determined whether the current detected in step S707 exceeds 400 mA, the process proceeds to step S602 in which the mobile communication terminal is set to the abnormal current mode.

In addition, when it is determined whether the current detected in step S710 exceeds 500 mA, the process proceeds to step S602 in which the mobile communication terminal is set to the abnormal current mode.

Here, although only four cases are illustrated and described in FIG. 7, it is also possible to detect a current flowing in the current detector by changing the state of all components consuming power among components included in the mobile communication terminal. In addition, the criterion for determining the abnormal current according to each state of the mobile communication terminal can be variously changed in consideration of the rated power consumption of the components. For example, in FIG. 7, when the current detected in step S710 exceeds 500 mA, the process proceeds to step S603 in which the mobile communication terminal is set to an abnormal current mode. However, the current detected in step S710 is different. It is also possible to proceed to step S603 in which the mobile communication terminal is set to the abnormal current mode when the current exceeds 700 mA.

On the other hand, in the case of the abnormal current as a result of the above-described determination in step S601, the mobile communication terminal is set to the abnormal current mode under the control of the controller (S602).

After step S602, the content of detecting the abnormal current is displayed on the display unit under the control of the controller (S603).

After step S603, it is checked in which part of the mobile communication terminal an abnormal current is caused, that is, the cause of the abnormal current (S604). Here, a method of checking which part of the mobile communication terminal causes an abnormal current will be described in more detail with reference to FIG. 8.

In step S604, the cause of the abnormal current is detected. First, the entire function unit is driven to detect the total driving current flowing through the current detector when the entire function unit is driven, and then each part included in the function unit is blocked one by one. The partial blocking current flowing through the current detector is detected, and it is determined whether the partial blocking current is the abnormal current by comparing the detected difference between the total driving current and the partial blocking current with a preset abnormal operation determination criterion. Accordingly, the blocked portion at the time when the partial blocking current determined as the abnormal current is detected is diagnosed as the cause of the abnormal current.

For example, first, after step S603, all parts of the functional part are turned on, that is, all parts of the functional part are driven (S800). The controller detects the current flowing in the current detection unit in the state in which each of the functional units is driven (S801). Here, the current checked by the controller is arbitrarily referred to as Ia.

In step S801, after checking the current flowing in the current detecting unit while driving the whole functional unit, the respective parts included in the functional unit are turned off one by one, that is, the current supplied to the respective portions is cut off one by one at that time. The current flowing through the current detection unit is detected. For example, the transmitter of the functional unit is cut off (S802), and the current flowing through the current detector in the blocked state of the transmitter is detected (S803). Here, the current flowing in the current detector in the state where the transmitter is cut off is arbitrarily referred to as Ib.

The difference between Ia and Ib checked in this process is calculated to determine whether the difference exceeds the abnormal current determination criteria (S804). That is, when the difference (Ia-Ib) between Ia and Ib exceeds 500 mA as in the case of FIGS. 5A to 5B, the controller determines that an abnormal current is generated by the transmitter (S805).

On the other hand, when the determination result of step S804, if the difference (Ia-Ib) between Ia and Ib does not exceed a predetermined abnormal current determination criterion, that is, 500mA, the process proceeds to step S806 to block the next receiver.

In a similar manner, in step S806, the receiver is cut off, and the current Ic flowing in the current detector is detected in the state of blocking the receiver (S807).

The difference between the currents Ic and Ia detected in step S807 is calculated to determine whether the difference exceeds the abnormal current determination criterion (S808). That is, as in the case of FIGS. 5A to 5B, it is determined whether (Ia-Ic) exceeds 100 mA.

As a result of the determination in step S808, when the difference between Ic and Ia exceeds the abnormal current determination criteria, that is, (Ia-Ic) exceeds 100mA, the controller determines that an abnormal current is generated by the receiver (S809).

If the difference between Ic and Ia does not exceed the abnormal current determination criteria, that is, if (Ia-Ic) does not exceed 100mA, the process proceeds to step S810.

Thereafter, in step S810, the backlight of the LCD display unit is turned off, and the current Id flowing in the current detector is detected in the state of turning off the backlight (S811).

The difference between the currents Id and Ia checked in step S811 is calculated to determine whether the difference exceeds the abnormal current determination criterion (S812). That is, as in the case of FIGS. 5A to 5B, it is determined whether (Ia-Id) exceeds 150 mA.

As a result of the determination in step S812, when the difference between Id and Ia exceeds the abnormal current determination criterion, that is, (Ia-Id) exceeds 150 mA, the controller determines that the abnormal current is generated by the display unit (S813).

If the difference between Id and Ia does not exceed the abnormal current determination criteria, that is, if (Ia-Id) does not exceed 150mA, the process proceeds to step S814.

Thereafter, in operation S814, the voice output unit is blocked, and in the state where the voice output unit is blocked, a current Ie flowing in the current detector is detected (S815).

The difference between the currents Ie and Ia checked in step S815 is calculated to determine whether the difference exceeds the abnormal current determination criterion (S816). That is, as in the case of FIGS. 5A to 5B, it is determined whether (Ia-Ie) exceeds 100 mA.

As a result of the determination in step S816, when the difference between Ie and Ia exceeds the abnormal current determination criteria, that is, (Ia-Ie) exceeds 100 mA, the controller determines that an abnormal current is generated due to the voice output unit (S817). .

If the difference between Ie and Ia does not exceed the abnormal current determination criteria, that is, if (Ia-Ie) does not exceed 100mA, the process proceeds to step S605.

In step S605, the content checked in the previous step is displayed on the display unit for the user to confirm. That is, the display unit notifies which part of the mobile communication terminal an abnormal current has occurred.

Accordingly, the user can easily know that an abnormality has occurred in his mobile communication terminal, and can also easily know in which part of the mobile communication terminal an abnormality has occurred. To facilitate.

As described above, those skilled in the art will appreciate that the present invention can be implemented in other specific forms without changing the technical spirit or essential features.

Therefore, the above-described embodiments are to be understood as illustrative and not restrictive in all respects, and the scope of the present invention is indicated by the appended claims rather than the detailed description, and the meaning and scope of the claims and All changes or modifications derived from the equivalent concept should be interpreted as being included in the scope of the present invention.

As described in detail above, the present invention, by checking the abnormal current for each state or part of the mobile communication terminal more effectively detects the abnormal current and notifies the user, the effect of making it easier to manage the mobile communication terminal There is.

Claims (15)

A function unit performing a function for performing mobile communication with the outside; A current detector for detecting a current applied from a power supply to the functional unit; And And a controller for controlling a function of the function unit, determining whether the current detected by the current detector is an abnormal current, setting to an abnormal current mode, and checking a cause of the abnormal current. The control unit, And a part of the function unit searching for which part of the function part is generated according to a predetermined abnormal operation determination criterion. The method of claim 1, The current detection unit is a mobile communication terminal having an abnormal current test function, characterized in that it comprises a current detection resistor. The method of claim 2, The current detecting resistor has a resistance value of 0.001 Ω or more and 0.01 Ω or less. The method of claim 2, One end of the current detecting resistor is commonly connected to the control unit and the functional unit, the other end is a mobile communication terminal having an abnormal current test function, characterized in that the common connection with the control unit and the power supply. The method of claim 4, wherein And a protection circuit unit for blocking an overcurrent between the other end of the current detection resistor and the power supply unit. The method of claim 1, And the controller measures an electric current flowing through the current detector by using a voltage difference between voltages across the current detector and a resistance value of the current detector. The method of claim 6, And the control unit detects an abnormal current by comparing the measured current flowing through the current detection unit with a preset abnormal current determination criterion. The method of claim 7, wherein The abnormal current determination criterion is a mobile communication terminal having an abnormal current inspection function, characterized in that determined according to the current flowing through the current detector for each operating state of the functional unit. delete The method of claim 1, The abnormal operation determination criterion is determined according to a difference between a current flowing through the current detector when the whole of the functional unit is driven and a current flowing through the current detector when a part of the functional unit is driven. Mobile communication terminal with current inspection function. A current detecting step of detecting, by the controller, a current applied to the functional unit through the current detecting unit; An abnormal current determination step of determining whether the current detected in the current detecting step is an abnormal current according to a predetermined abnormal current determination criterion; As a result of the determination, when the detected current is the abnormal current, the abnormal current cause search step of finding the cause portion of the phase current generation under the control of the controller. An error diagnosis method using a mobile communication terminal having an abnormal current test function comprising a. The method of claim 11, Between the abnormal current determination step and the abnormal current cause search step And an abnormal current detection displaying step of displaying the detection of the abnormal current on the display unit. The method of claim 11, After the abnormal current cause search step And an abnormal current cause display step of displaying the cause of the abnormal current searched by the control unit to the display unit. The abnormality diagnosis method using the mobile communication terminal having the abnormal current inspection function. The method of claim 11, The abnormal current determination step An operation mode determination step of determining an operation mode of the mobile communication terminal; A current detection step of detecting current flowing through the current detection unit in the mode determined in the operation mode determination step; An abnormal current reference comparison determining step of determining whether the current detected in the current detecting step is an abnormal current by comparing the current detected in the current detecting step with a preset abnormal current determining criterion. An error diagnosis method using a mobile communication terminal having an abnormal current test function comprising a. The method of claim 11, The abnormal current cause search step A total current detection step of driving the whole of the functional unit to detect a current flowing through the current detector when the whole of the functional unit is driven; A partial blocking current detection step of detecting a current flowing through the current detection unit by blocking each of the parts included in the functional unit one by one; An abnormal operation comparison determining step of determining whether the breaking current detected in the partial breaking current detection step is an abnormal current by comparing the current detected in the partial breaking current detection step with a preset abnormal operation determination criterion; Determination step for abnormal operation cause which determines the part of the functional unit that is blocked at the time when the abnormal current determined in the abnormal operation comparison determination step is detected as the cause of abnormal operation. An error diagnosis method using a mobile communication terminal having an abnormal current test function comprising a.

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