KR20020001069A - Apparatus for charging in a mobile communication terminal - Google Patents

Abstract

PURPOSE: A charging apparatus in a mobile station is provided to charge the battery with external power supplied to an AC-DC adapter, without using a charger, by installing a charging unit inside of a mobile station. CONSTITUTION: A charging apparatus in a mobile station is composed of a rectifier(10), a resistor(R), a battery(20), a comparator(30), an A/D converter(40), a CPU(50), an alarm generation part(60), and a timer(70). The rectifier(10) removes the ripples of DC power supplied through a DC-DC adapter. The resistor(R) detects the voltage supplied through the rectifier(10). The battery(20) charges or discharges the ripple-removed DC voltage. The comparator(30) compares the DC voltage(V1) supplied through the rectifier(10) with the discharging voltage of the battery(20) and outputs a difference voltage. The A/D converter(40) converts the analog signal outputted from the comparator(30) into a digital signal. The CPU(50) analyzes the digital signal outputted from the A/D converter(40). As a result, if the digital signal indicates a value of "0", the CPU(50) outputs an alarm generation control signal to generate an alarm to indicate that charging has been completed. Also the CPU(50) generates a timer driving signal for charging. The alarm generation part(60) generates an alarm according to the alarm generation control signal. Based on the timer driving signal, the timer(70) executes counting during a preset counter value and transfers the counted value to the CPU(50).

Description

Apparatus for charging in a mobile communication terminal}

The present invention relates to a charging device of a mobile station, and in particular, by adding a charging device to the inside of the mobile communication terminal, it is possible to charge the external power supplied to the adapter (AC-DC adapter), The present invention relates to a charging device of a mobile communication terminal that enables charging of a battery without using a charger.

In general, a mobile communication terminal is sold with a terminal in which a charger suitable for its set is set.

Here, since the type of the mobile communication terminal and the battery charging method are different for each mobile communication terminal manufacturer, the charger is different for each product type.

Therefore, when a consumer has an abnormality in his charger, the charger of another product cannot be used, and thus, it is difficult to purchase a charger suitable for his product.

In recent years, the government recommends that chargers be used in common. However, these chargers are more expensive than existing single product chargers, making it difficult for users to easily purchase a charger.

Therefore, the present invention has been proposed to solve various problems that occur when using the charger of the conventional mobile communication terminal as described above,

An object of the present invention, by adding a charging device to the inside of the mobile communication terminal, it is possible to charge the external power supplied to the adapter (AC-DC adapter), and also to enable the charging of the battery without using a charger An object of the present invention is to provide a charging device for a mobile communication terminal.

"Charging device of a mobile communication terminal" according to the present invention for achieving the above object,

A rectifier for removing ripples of DC power supplied through the AC-DC adapter;

A battery for charging and discharging the DC voltage from which the ripple is removed through the rectifier;

A comparator for comparing the DC voltage through the rectifier with the discharge voltage of the battery and outputting the difference voltage;

An analog / digital converter for converting an analog signal output from the comparator into a corresponding digital signal;

a) searching and analyzing the digital signal output from the analog-to-digital converter,

b) As a result, if the input digital signal is a value indicating zero, an alarm generation control signal is output to generate an alarm indicating that charging is completed.

c) a central processing unit which generates a timer driving signal during charging and outputs a warning generation control signal to generate a warning alarm if no charging occurs for a predetermined time;

In response to the alarm generation control signal output from the central processing unit, an alarm indicating that charging is completed is generated and transmitted to the outside, and an alarm generation is generated to generate a warning alarm to the warning generation control signal output from the central processing unit and to send it out. It is characterized by consisting of wealth.

In addition, the "charging device for a mobile communication terminal" according to the present invention,

And a timer that operates according to a timer driving signal output from the CPU, performs a counting for a set count value, and transfers the counting value to the CPU.

1 is a circuit diagram showing the configuration of a charging device for a mobile communication terminal according to the present invention.

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

10 ..... Rectifier

20 ..... Battery

30 ..... Comparators

40 ..... Analog-to-digital converter

50 ..... Central Processing Unit

60 ..... Alarm Generator

70 ..... Timer

Hereinafter, described in detail with reference to the accompanying drawings, preferred embodiments of the present invention according to the technical spirit as described above.

1 is a circuit diagram illustrating a configuration of a charging device of a mobile communication terminal according to the present invention.

Here, reference numeral 10 denotes a rectifier for removing ripples of DC power supplied through an AC-DC adapter (not shown in the drawing), and R denotes a resistance for detecting a voltage through the rectifier 10. Reference numeral 20 denotes a battery for charging and discharging the DC voltage from which the ripple has been removed through the rectifier 10, and reference numeral 30 denotes a DC voltage V1 through the rectifier 10 and the discharge voltage of the battery 20. The comparator which compares (V2) and outputs the difference voltage is shown.

Also, reference numeral 40 denotes an analog / digital converter for converting an analog signal output from the comparator 30 into a digital signal corresponding thereto, and reference numeral 50 denotes a) digital output from the analog / digital converter 40. Search and analyze the signal; b) if the input digital signal is a value indicating zero, output an alarm generation control signal to generate an alarm indicating that charging is complete; and c) provide a timer drive signal during charging. And a central processing unit that outputs a warning generation control signal to generate a warning alarm when charging does not occur for a predetermined time.

In addition, the reference numeral 60 generates an alarm indicating that the charging is completed in response to the alarm generation control signal output from the central processing unit 50 and transmits it to the outside, and a warning generation control signal output from the central processing unit 50. An alarm generating unit for generating a warning alarm to be sent to the outside, the reference numeral 70 is operated according to the timer drive signal output from the central processing unit 50, performs a counting for a set count value and the counting value A timer for transmitting to the CPU 50 is shown.

The charging device for a mobile communication terminal according to the present invention configured as described above, as a initial condition, a mobile communication terminal incorporating the charging device according to the present invention has a port to which an AC / DC adapter can be connected.

Then, when the AC / DC adapter is connected to the port, the rectifier 10 removes the ripple of the DC power input by using a ripple cancellation circuit composed of a reactance L and a capacitor C.

The rectified voltage from which the ripple is removed is input to the non-inverting terminal (+) of the comparator 30 and is charged to the battery 20 through the current detecting resistor R. In addition, the voltage charged in the battery 20 is discharged and input to the inverting terminal (-) of the comparator 30.

The comparator 30 compares the voltage V1 input to the non-inverting terminal (+) with the voltage V2 input to the inverting terminal (−) and inputs the difference voltage to the analog / digital converter 40. .

The analog-to-digital converter 40 converts the input analog signal into a digital signal corresponding thereto and transmits the converted analog signal to the central processing unit 50.

The CPU 50 searches and analyzes the digital signal obtained from the analog-to-digital converter 40 and checks whether the value is "0".

The reason for searching whether the input signal is "0" is that the charging of the battery 20 is completed only when the input digital value is "0", that is, the output of the comparator 30 becomes "0". Because it's time.

As a result of this check, when the input digital signal is not " 0 ", the CPU 50 maintains the current state. This is a state in which the battery 20 is not fully charged yet.

In addition, when the digital signal input as a result of the check is "0", the central processing unit 50 determines that the battery 20 is fully charged, and generates an alarm generation control signal to inform the user of The alarm generating unit 60 transmits.

Accordingly, the alarm generator 60 generates an alarm indicating that the charging is completed and sends the alarm to the outside, so that the user recognizes that the battery 20 is fully charged.

On the other hand, the central processing unit 50 detects this when the user connects the AC-DC adapter to the mobile phone (mobile communication terminal) to charge the battery 20, and drives the timer 70.

After that, the initial output of the analog-to-digital converter 40 is stored, and when the output value of the analog-to-digital converter 40 is not converted even though the timer 70 counts all of the set time, the battery protection and the mobile phone are stored. For protection, an alarm generation control signal is output to the alarm generation unit 60 so as to generate a warning alarm.

In other words, if the charging voltage of the battery does not change even after a certain time has elapsed since charging started (except for charging only), an error has occurred in the charging circuit or the battery has failed. Charging should be stopped.

Therefore, when the alarm generation control signal is transmitted from the central processing unit 50, the alarm generation unit 60 immediately generates a warning alarm and sends it to the outside, so that the user recognizes a failure state such as an abnormal charging circuit or an abnormal battery. do.

Here, the alarm generating unit 60 may generate an alarm generated at the time of full charge and an alarm generated at the time of warning so that the user may know whether the user is fully charged or not charged.

According to the present invention "charging device of the mobile communication terminal" described above, there is an advantage that can be charged without a separate charger by embedding the charging device in the terminal.

In addition, since the charging device is built in the mobile phone, there is an advantage that can reduce the cost of purchasing the charger.

Claims (3)

In the mobile communication terminal, A rectifier for removing ripples of DC power supplied through the AC-DC adapter; A battery for charging and discharging the DC voltage from which the ripple is removed through the rectifier; A comparator for comparing the DC voltage through the rectifier with the discharge voltage of the battery and outputting the difference voltage; An analog / digital converter for converting an analog signal output from the comparator into a corresponding digital signal; a) searching and analyzing the digital signal output from the analog-to-digital converter, b) As a result, if the input digital signal is a value indicating zero, an alarm generation control signal is output to generate an alarm indicating that charging is completed. c) a central processing unit which generates a timer driving signal during charging and outputs a warning generation control signal to generate a warning alarm if no charging occurs for a predetermined time; In response to the alarm generation control signal output from the central processing unit, an alarm indicating that charging is completed is generated and transmitted to the outside, and an alarm generation is generated to generate a warning alarm to the warning generation control signal output from the central processing unit and to send it out. Charging apparatus for a mobile communication terminal, characterized in that configured to include. The method of claim 1, further comprising a timer that operates according to a timer driving signal output from the CPU, performs a counting for a set count value, and transfers the counting value to the CPU. Charging device of the mobile communication terminal. The method of claim 1, wherein the alarm generating unit, The charging device of the mobile communication terminal, characterized in that the alarm generated when the charging is completed and the alarm to warn it when the charging is different.