KR100706438B1 - Charger comprising a degaussing block and degaussing method, and mobile communication terminal which is degaussed thereby - Google Patents

Abstract

A charging device and a degaussing method including a degaussing unit for restoring a magnetized magnetic sensor to its original state according to a user's selection during charging of the mobile communication terminal by providing a degaussing unit inside the charging device, and accordingly A mobile communication terminal which is degaussed is disclosed. The charging device of the mobile communication terminal according to the present invention, the charging circuit unit for receiving the AC power to supply the rated charging power to the battery of the mobile communication terminal; And a degaussing unit for degaussing the magnetized parts of the mobile communication terminal by forming a magnetic field by supplying a coil to the coil while turning on and off the rated charging power from the charging circuit unit according to a user's degaussing execution command. It is characterized by. Accordingly, when the magnetic sensor of the mobile communication terminal is magnetized, the user can directly perform degaussing without leaving the service center.

Description

Charging device having a degaussing unit and a degaussing method thereof, and a mobile communication terminal degaussing accordingly {Charger comprising a degaussing block and degaussing method, and mobile communication terminal which is degaussed hence}

1 is a simplified block diagram of a mobile communication terminal charging device according to a preferred embodiment of the present invention;

2 is a detailed block diagram of the charging device of FIG.

3 is a diagram illustrating an example in which a coil is generated inside the cradle 130 of FIG. 1 to generate a magnetic field for degaussing.

4 is a view for explaining a degaussing process according to an embodiment of the present invention with reference to a hysteresis curve;

5 is a flowchart of a degaussing method according to a preferred embodiment of the present invention.

The present invention relates to degaussing a magnetized sensor inside a mobile communication terminal, and more particularly, by providing a degaussing unit inside a charging device, according to a user's selection during charging of a mobile communication terminal. The present invention relates to a charging device and a degaussing method including a degaussing unit for restoring a magnetized magnetic sensor to its original state, and a mobile communication terminal which is degaussed accordingly.

As the functions of the mobile communication terminals increase and diversify, various types of sensors such as GPS sensors, magnetic sensors, motion sensors, and gravity sensors are mounted on the mobile communication terminals. These sensors are often magnetized by magnetic fields generated by adjacent components or by other external factors, preventing them from functioning.

When the magnetic sensor is magnetized, the magnetic component must be removed. This is called degaussing. If the magnetic sensor is magnetized and its function does not work normally, the degaussing cannot be done by the user. There is an inconvenience of leaving the mobile communication terminal to the service center for the Gaussing.

Accordingly, an aspect of the present invention is to provide a charging device having a degaussing unit for degaussing a magnetized magnetic sensor by further including a degaussing unit in a charging device of a mobile communication terminal, and a degaussing method thereof. will be.

Another object of the present invention is to provide a mobile communication terminal which is degaussed by a charging device.

According to an aspect of the present invention, there is provided a charging device of a mobile communication terminal, comprising: a charging circuit unit receiving AC power to supply a rated charging power to a battery of the mobile communication terminal; And a degaussing unit for degaussing the magnetized parts of the mobile communication terminal by supplying a coil to the coil while turning on and off the rated charging power from the charging circuit unit to form a magnetic field according to a user's degaussing execution command. It is achieved by a charging device comprising a.

The degaussing unit includes a coil installed around a charging insertion hole into which the mobile communication terminal is inserted, and alternately changes the direction of the current flowing through the coil, and the current flowing through the coil whenever the direction of the current is changed. It is preferable to form a magnetic field in the coil while repeating a predetermined number of times to gradually decrease the maximum value of.

On the other hand, according to another field of the present invention, the technical problem is in the degaussing method of a mobile communication terminal component, (a) receiving a degaussing command from the user data input to the digital-to-analog converter (DAC) Outputting a command to control a value and on / off of power supplied to the coil; (b) receiving the data value, converting the analog data into analog data, and outputting the analog data; (c) turning on and off the power supplied to the coil from the FET by receiving the analog output signal as a gate and controlling the on / off of the FET according to the value thereof; And (d) receiving power from the switch unit to form a magnetic field.

In addition, the above technical problem, in the degaussing method of the mobile communication terminal component, when the direction of the current is changed while alternating the direction of the current flowing in the coil provided around the charging insertion hole is inserted into the mobile communication terminal The degaussing method is also achieved by removing the magnetization component of the mobile communication terminal component by forming a magnetic field in the coil by repeating a predetermined number of times to gradually decrease the maximum value of the current flowing through the coil every time.

In addition, in the mobile communication terminal degaussed by a charging device, the technical problem is to supply the rated charging power to the battery of the mobile communication terminal by AC power supply and the rated charging according to the user's degaussing execution command It is also achieved by a mobile communication terminal characterized by degaussing a part that has been magnetized by the influence of a magnetic field formed by supplying the coil with power on and off.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a simplified block diagram of a mobile terminal charging apparatus according to a preferred embodiment of the present invention.

Charging apparatus of a mobile communication terminal according to an embodiment of the present invention includes a charging circuit unit 110, the degaussing unit 120, the cradle 130. The charging circuit unit 110 receives AC power, converts the power into a rated DC power required to charge the battery of the mobile communication terminal, and outputs it through the charging terminal of the holder 130. The cradle 130 generally includes a terminal insertion unit for inserting and charging a mobile communication terminal in a battery coupled state and a battery insertion unit for inserting and charging an extra battery as it is, and charging is performed by inserting a mobile communication terminal or a battery. . The degaussing unit 120 is connected to the user switch, and when the switch is pressed, a magnetic field is generated through the coil, thereby removing the magnetization component of the magnetized magnetic sensor.

FIG. 2 is a detailed block diagram of the charging device of FIG. 1.

The charging circuit unit 110 includes a rectifier 111, a transformer 112, a DC converter 113, and a charging controller 114. The rectifier 11 rectifies the input AC power and removes noise components included therein. The transformer 112 steps down the input AC power of 110V or 220V to meet the DC converter 113 standard of the charging device. The DC converter 113 converts the AC power stepped down by the transformer 112 into a DC power that meets the battery charging standard of the mobile communication terminal and outputs the converted DC power. For example, the battery charge specification could be DC 5.2V. The charging control unit 114 controls the entire charging circuit unit 110 to prevent an overcurrent or an abnormal rise in the temperature of the charging circuit unit 110.

The degaussing unit 120 includes a degaussing control unit 121, a digital-to-analog converter (DAC) 122, a resistor 123, a FET 124, a switch unit 125, and a coil 126.

The degaussing control unit 121 receives an input for executing degaussing from a user through a switch, a button, or the like, and receives data to be input to the digital-to-analog converter (DAC) 122 according to the degaussing algorithm of the present invention. Print it differently. Then, the switching of the first switch 127 and the second switch 128 included in the switch unit 125 is controlled according to the degaussing process. The switching of the first switch 127 and the second switch 128 will be described later.

The gate of the FET 124 is connected to the output of the DAC 122, the drain is connected to the charging power supply of the charging circuit portion and the source is connected to the switch section 125. Accordingly, the FET 124 adjusts the amount of charge current output from the DC converter 1130 of the charge circuit unit 110 according to the voltage of the gate input through the digital-to-analog converter (DAC) 122. In other words, if the gate voltage is large, the current flowing from the drain to the source through the FET 124 is small, and if the gate voltage is small, the current flowing from the drain to the source through the FET 124 is large. The resistor 123 adjusts the voltage output from the digital-to-analog converter (DAC) 122 and input to the gate of the FET 124.

Meanwhile, the switch unit 125 includes a first switch 127 and a second switch 128 so that an output end of the first switch 127 is connected to one side of the coil 126 and an output end of the second switch 128. Is connected to the other side of the coil 126. In addition, since the input terminal of the first switch 127 and the second switch 128 is connected to the output and the ground of the FET 124, respectively, the output or the ground of the FET 124 according to the switching control signal of the degaussing controller 121. The signal is connected to the output terminal of the first switch 127 and the second switch 128 and transmitted to the coil 136. At this time, the switching of the first switch 127 and the second switch 128 is reversed. That is, when the output terminal of the first switch 127 is switched to be connected to the output (source terminal) of the FET 124, the output terminal of the second switch 128 is switched to be connected to ground. The coil 126 generates a magnetic field by the current input from the switch 125.

The voltage value output from the digital-to-analog converter (DAC) 122, the current output from the FET 124, and the operation of the switch unit 125 will be described below with reference to FIG. 4.

FIG. 3 is a diagram illustrating an example in which a coil for generating a magnetic field for degaussing is mounted inside the cradle 130 of FIG. 1.

As described above with reference to FIG. 1, the cradle 130 includes a terminal insertion unit 310 and a battery insertion unit 320. The coil 126 of the degaussing unit 120 is wound around the insertion unit 310 of the mobile communication terminal to degauss the magnetized magnetic sensor mounted on the mobile communication terminal. Accordingly, the magnetic field formed in the coil 126 affects the mobile communication terminal, thereby canceling the magnetization component of the magnetized magnetic sensor. In the embodiment of FIG. 3, the example in which the terminal insertion unit 310 is wound with the coil 126 has been described. However, the position of the coil 126 may vary depending on the form of the terminal, the form of the cradle 130, or the form of the terminal insertion unit 310. It may be installed differently.

4 is a diagram for describing a degaussing process according to an embodiment of the present invention with reference to a hysteresis curve.

First, when the degaussing control unit 121 receives a degaussing command from the user, the digital-to-analog converter is configured to initialize the switch unit 125 and output the maximum value that the digital-to-analog converter (DAC) 122 can output. (DAC) 122 is controlled. When the switch unit 125 is initialized, the input of the first switch 127 is connected to the source terminal of the FET 124, and the input of the second switch 128 is connected to the ground.

When the output of the digital-to-analog converter (DAC) 122 reaches a maximum value, the FET 124 is turned off so that the current flowing from the charging circuit unit 110 to the FET 124 becomes zero. Then, if the output value of the digital-to-analog converter (DAC) 122 is reduced, that is, the voltage value input to the gate of the FET 124 is decreased, the current value flowing to the FET 124 becomes larger, and the digital-to-analog converter is increased. When the output value of the (DAC) 122 becomes 0, the current value flowing through the FET 124 becomes maximum. This process corresponds to curve A 420 of FIG.

When the output value of the digital-to-analog converter (DAC) 122 is increased again, the current value flowing through the FET 124 is gradually decreased, and when the output value of the digital-to-analog converter (DAC) 122 reaches the maximum value, the FET 124 is supplied to the FET 124. The flowing current value becomes zero. This process corresponds to the curved portion B 430 of FIG. The point at which the current value becomes zero is the point C 440 in the graph. When this step is performed, the counter value is increased by one. Each time the counter value is increased, the output maximum value of the digital-to-analog converter (DAC) 122 is decreased. For example, when 12 is reached, the amount of decrease is adjusted so that the maximum value becomes 0.

Next, the degaussing control unit 121 controls the switch unit 125 so that the input of the first switch 127 is connected to ground, and the input of the second switch 128 is connected to the source terminal of the FET 124. To be connected. When the output value of the digital-to-analog converter (DAC) is reduced, the current value flowing through the FET 124 is gradually increased. When the output value of the digital-to-analog converter (DAC) 122 becomes 0, the current value flowing through the FET 124 is maximum. Becomes This process corresponds to curve D 450 of FIG. When the output value of the digital-to-analog converter (DAC) 122 is increased again, the current value flowing through the FET 124 is gradually decreased, so that the output value of the digital-to-analog converter (DAC) 122 is maximized to flow to the FET 124. The current value is zero. This process corresponds to curve E 460 in FIG. Then increase the counter value by one.

If the above-described process is repeated, the current flowing in the coil 126 gradually decreases with each passing step, and finally degaussing is completed when it reaches zero. This point is point 410 in the hysteresis graph.

5 is a flowchart of a degaussing method according to a preferred embodiment of the present invention.

First, when the user presses the degaussing execution button (switch) to perform degaussing, the user receives this signal (S510). Then, the degaussing control unit 121 outputs a command for turning on or off the power supply to the coil 126 to the switch unit 125 (S520), and supplies the digital to the analog-to-analog converter (DAC) 122. The data is output while controlling (S530). At this time, according to the analog data current value output from the digital-to-analog converter (DAC) 122, the switch unit 125 turns on and off the power supply from the charging circuit unit 110, thereby turning on and off the power supply of the coil 126. do. In this way, the coil 126 is supplied with power to form a magnetic field (S540).

Then, the counter is incremented by one to determine whether the predetermined reference value has been reached (S550). If the predetermined reference value is reached, degaussing is terminated. If the predetermined reference value is not reached, the switch unit 125 turns on and off the step. Returning to step S520, the switch unit 125 is set again. That is, the current switch states of the first switch 127 and the second switch 128 constituting the switch unit 125 are respectively switched to change the polarity of the power flowing through the coil. The control of the digital-to-analog converter (DAC) 122 is performed, and the value output from the digital-to-analog converter (DAC) 122 is made smaller than the first step.

So far I looked at the center of the preferred embodiment for the present invention. Those skilled in the art will appreciate that the present invention can be implemented in a modified form without departing from the essential features of the present invention. Therefore, the disclosed embodiments should be considered in descriptive sense only and not for purposes of limitation. The scope of the present invention is shown in the claims rather than the foregoing description, and all differences within the scope will be construed as being included in the present invention.

As described above, according to the present invention, when the magnetic sensor of the mobile communication terminal is magnetized, the user can directly perform degaussing without leaving the service center, and the degaussing unit is mounted on the charging device without making a separate device. This saves space and is easy to implement.

Claims (8)

In the charging device of a mobile communication terminal, A charging circuit unit configured to receive AC power and supply rated charging power to a battery of the mobile communication terminal; And And a degaussing unit for degaussing the magnetized components of the mobile communication terminal by supplying a coil to the coil while turning on and off the rated charging power from the charging circuit unit according to a user's degaussing execution command. The charging device characterized by the above-mentioned. The method of claim 1, wherein the degaussing unit And a coil installed around a charging insertion hole into which the mobile communication terminal is inserted, and alternating the direction of the current flowing through the coil, and gradually changing the maximum value of the current flowing through the coil each time the direction of the current is changed. Charging device, characterized in that to form a magnetic field in the coil while repeating a certain number of times to reduce. The method of claim 1, wherein the degaussing unit A degaussing control unit which receives a degaussing command from a user and outputs a command for controlling a data value input to a digital-to-analog converter (DAC) and an on / off of power supplied to a coil; A digital-to-analog converter (DAC) for receiving the digital data output from the degaussing controller, converting the digital data into analog data, and outputting the analog data; A FET which receives a current value output from the digital-to-analog converter (DAC) as a gate and is turned on or off according to the value; A switch unit for turning on and off power supplied from the FET to the coil in response to a control command from the degaussing control unit; And Charging device comprising a coil for receiving a power from the switch to form a magnetic field. The method of claim 3, wherein the switch unit And a first switch and a second switch, wherein the switching of the first switch and the second switch is performed opposite to each other. In the degaussing method of a mobile terminal component, (a) receiving a degaussing command from a user and outputting a command for controlling on / off of data values input to a digital-to-analog converter (DAC) and power supplied to the coil; (b) receiving the data value, converting the analog data into analog data and outputting the analog data; (c) turning on and off the power supplied to the coil from the FET by receiving the analog output signal as a gate and controlling the on / off of the FET according to the value thereof; And and (d) receiving a power supply from the switch unit to form a magnetic field. In the degaussing method of a mobile terminal component, Alternating the direction of the current flowing in the coil installed around the charging insertion hole into which the mobile communication terminal is inserted, and repeatedly decreasing the maximum value of the current flowing in the coil each time the direction of the current is changed While forming a magnetic field in the coil to remove the magnetization component of the mobile communication terminal component. In the mobile communication terminal degaussed by the charging device, Parts that were magnetized by the influence of the magnetic field formed by supplying the rated charging power to the battery of the mobile communication terminal by the AC power supply and supplying the coil with the rated charging power on and off according to the user's degaussing execution command. Mobile communication terminal characterized in that the degaussing. The method of claim 7, wherein the mobile communication terminal Alternating the direction of the current flowing in the coil installed around the charging insertion hole into which the mobile communication terminal is inserted, and repeatedly decreasing the maximum value of the current flowing in the coil every time the direction of the current is changed And degaussing the components that have been magnetized under the influence of the magnetic field.

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