KR20020073673A - Battery charging state display apparatus and method for mobile communication device - Google Patents

Abstract

PURPOSE: An apparatus and a method for displaying a charging state of a battery in a mobile communication terminal are provided to display correctly the charging state of the battery by reading battery charging data from an external charger without using an additional device. CONSTITUTION: A charging state voltage generation portion(40) detects charging current supplied to a battery and generates different voltage levels according to the charging states. An external charger combining state detection portion(30) receives voltage generated from the charging state voltage generation portion(40) and detects a connecting state with an external charger. An automatic power-on circuit(20) is used for turning on a mobile communication terminal, automatically. A CPU(10) controls all operations of the each component in order to display the charging states.

Description

Battery charging status display device and method of mobile communication terminal {BATTERY CHARGING STATE DISPLAY APPARATUS AND METHOD FOR MOBILE COMMUNICATION DEVICE}

The present invention relates to a battery charging status display device and method of a mobile communication terminal, and more particularly, a mobile device capable of displaying accurate charging status of a battery by reading battery charging information from an external charger without an additional device inside the mobile communication terminal. The present invention relates to a battery charging state display device and a method of a communication terminal.

In general, a mobile communication terminal includes a battery charging device. As a method for displaying the state of charge, a mobile communication terminal first includes a method for displaying information provided from the IC by embedding a separate charging-related IC inside a mobile phone. There is this.

However, the above method has a problem of increasing the price and weight of the terminal according to the use of a separate IC.

Next, as a second method to display the state of charge by providing a display means (LED, etc.) on the external charging device, in general, the red LED (not shown) in the discharge state, the green LED ( Not shown).

However, the second method is also difficult to check the state of charge in the structure that is configured to insert only the charging line in the plug-integrated charger in the terminal, in some chargers, the end of the line inserted into the terminal or the charging indicator means on the charger body Although there is provided with, there is a problem that does not display the exact state of charge but only to display whether the buffer by the LED lights.

As described above, the terminal itself is not provided with a device for accurately displaying the state of charge of the battery due to the increase in manufacturing cost and the increase in the weight of the terminal. You can only check the exact state of charge is not a problem.

Accordingly, the present invention has been made to solve the above-mentioned conventional problems, and reads the battery charging information from an external charger without an additional device inside the mobile communication terminal to display not only a simple full state of the battery but also an accurate state of charge. An object of the present invention is to provide an apparatus and method for displaying a battery charge state of a mobile communication terminal.

1 is a block diagram showing a schematic configuration of a battery charge state display device of a mobile communication terminal according to the present invention.

2 is a flowchart illustrating a process of displaying a state of charge of a battery of a mobile communication terminal according to the present invention;

*** Description of the symbols for the main parts of the drawings ***

10: CPI 20: Automatic power on circuit

30: external charger coupling detection unit 40: charging state voltage generation unit

According to an aspect of the present invention, there is provided a mobile communication terminal configured to charge a battery by receiving power from a battery charging device external to the terminal, wherein the battery charging device detects a charging current supplied to a battery, and A charging state voltage generator configured to generate charging state information of different voltage levels when the charging is completed; and an external charger coupling detector for detecting whether the external charger is coupled by receiving a voltage generated by the charging state voltage generator; And an automatic power-on circuit for automatically turning on the power of the terminal, and the CPI controlling the respective components to control the display and the completion of charging only when the battery is coupled. do.

Hereinafter, an embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

The present invention is characterized by checking whether the battery is installed using the ID information of the mobile phone battery pack, so that charging can be performed only when the battery is mounted in the terminal.

Here, the ID information of the battery pack is information for distinguishing whether the battery pack is a large capacity or a small capacity, and the purpose of adjusting the current flow during charging according to the capacity so that the charging can be completed within a certain time regardless of the capacity. However, the information is not used in recent years to reduce the cost of the charger, the present invention is used for detecting the presence of the battery.

In addition, the present invention is able to withdraw the battery state of charge information from the external charger to the terminal side, that is, the battery state of charge information can be applied to the mobile communication terminal with the battery charging power, it is accurate by the state of charge information Characterized in that the display state of the battery charge on the display window (not shown) of the terminal.

1 is a block diagram showing a schematic configuration of a battery charge state display device of a mobile communication terminal according to the present invention.

In the mobile communication terminal configured to charge the battery by receiving power from a battery charging device external to the terminal as shown in the drawing, the battery charging device detects the charging current supplied to the battery Bat, during charging and when charging is completed. It is provided with a charge state voltage generator 40 for generating charge state information of different voltage levels, the terminal receives the voltage generated by the charge state voltage generator 40 to externally detect whether the external charger is coupled The charger coupling detection unit 30, the automatic power-on circuit 20 for automatically turning on the power of the terminal, and each of the components to control the display of the charging and the completion of the charge only when the battery is coupled It comprises a Cfi oil 10 to control.

Here, the battery charging unit detects in real time the current applied to the battery Bat on the terminal side and outputs it to the terminal as battery charge state information.

Accordingly, the terminal side analyzes the state of charge information so that the charge voltage can be displayed in three stages (0 V (discharge state) <AV (recharge state) <BV (full state)).

Of course, the three charge voltages are generated by the battery charging unit and output to the terminal side. For more accurate real-time status display, the charge voltage may be displayed in percent (%) form using an A / D converter (not shown).

Then, the battery charging state display process of the present invention having the above characteristics will be described in more detail with reference to FIG. 1.

First, the CPI 10 of the terminal checks the battery ID to determine whether the battery is installed, and when the external charging device unit and the terminal are coupled, the external charger coupling detection unit 30 detects this to indicate that the charging device is coupled ( 10) to notify.

Accordingly, the CPI 10 confirms that the battery is mounted in the terminal and the external charging device is coupled to the terminal, and displays the charging state on the display device (not shown) of the terminal.

At this time, if the terminal is in the power-off state by turning on the terminal by the automatic power-on circuit 20, it is possible to eliminate the hassle that the user has to operate the terminal to turn on the power again.

In addition, when the battery ID is not detected, since the battery is not installed, the terminal displays only the fact that the external charging device is coupled without displaying the charging state.

On the other hand, the operation of the battery charging device unit is briefly described as follows.

First, the comparator COMP1 outputs a 'high' level voltage when the voltage difference across the resistor is large due to the amount of current flowing through the resistor R1 connected to the input terminal thereof, thereby indicating that the NMOS transistor Q2 is turned on to be charged. The device LED2 is turned on, and at the same time, the transistor Q3 is turned on to generate a voltage AV of a predetermined level by the resistor R2 connected to the emitter.

If the voltage difference between the resistor R1 connected to the input of the comparator COMP1 is small, a voltage having a low level is output, thereby turning on the PMOS transistor Q1 to turn on the device LED1 indicating that charging is completed. At the same time, the transistor Q3 is also turned off, and the voltage BV at that time is output to the terminal side.

That is, in the conventional charger configured to display the charging and the completion of the conventional charge, only the charge state display elements (LED1, LED2) driving circuit is provided only internally, in the present invention is different from the charging and at the completion of charging In order to generate the voltage level, a charging state voltage generation unit including a transistor Q3 and a resistor R2 is further provided, and the voltage level at that time is output to the CPI 10 on the terminal side.

Accordingly, the CPI 10 is to display the state of charge by the process as shown in FIG.

That is, the CPI 10 analyzes the voltage level (charge state information) and determines that the external charger is not connected when it is smaller than AV (0 ≤ charge information <A). It is determined that the charger is coupled and being charged.

If the external charger is coupled and the charging power is applied, it is determined whether the terminal power is on or off, and if it is off, the power is automatically turned on and the charger is displayed on the display window (not shown) of the terminal. do.

Next, if the charger is coupled as described above and the charging state information at the time is more than AV or less than BV, it is determined whether the battery is installed, and if the battery is installed, the charging state is displayed. Since it is not in a state, the charging indicator is not displayed.

Next, if the charger is coupled as described above and the charging state information at that time is BV or more, it is determined whether the battery is installed, and if the battery is installed, the charging completion state is displayed. No charging is indicated.

As described above, the battery charging state display apparatus and method of the present invention further include a charging state information generation unit including a transistor and a resistor in an existing external charger, and the terminal provides the state of charge information without a special additional device. It has the effect of displaying the correct battery charge status by receiving the input.

In addition, the present invention does not change the shape of the external charger and the terminal coupling means structurally, by utilizing the spare terminal as a terminal for transmitting the charging status information, it is possible to maintain compatibility with the existing charger, the terminal is added It is effective to implement the function without cost.

Claims (3)

A mobile communication terminal configured to charge a battery by receiving power from a battery charging device external to the terminal, wherein the battery charging device detects a charging current supplied to the battery, thereby charging state information of different voltage levels during charging and completion of charging. And a charge state voltage generation unit configured to generate a power supply, and wherein the terminal receives the voltage generated by the charge state voltage generation unit, and an external charger combination detection unit for detecting whether the external charger is coupled, and an automatic unit for automatically turning on the power of the terminal. And a CPI controlling the power-on circuit and each of the components to control the display and the completion of charging only when the battery is coupled. In a mobile communication terminal configured to charge a battery by receiving power from a battery charging device external to the terminal, the battery charging device is configured to output a predetermined voltage (charge state information) of a plurality of levels according to a battery charging current. Determining whether the external battery charger is coupled; A second step of determining the power on / off state of the terminal and automatically turning on the power in the off state when the charging device is coupled; A third step of checking whether or not the battery is installed when the terminal is powered on; When the battery is installed as a result of the check, the mobile communication terminal comprising a fourth step of analyzing the state of charge information output from the battery charging device and displaying whether the battery charging state and whether the charging device is coupled to the display window of the terminal How to display the battery charge status. The method of claim 2, wherein the battery charging state is determined that the charging device is not connected when a voltage below the reference level (AV) is detected, and when the charging state voltage level is higher than the reference level (AV) If it is determined that it is in a coupled state, and the battery is installed in a state where the charging device is coupled, if a voltage below the reference level AV or less than the charge level BV is detected, it is determined that it is charging, and the charge level BV is The battery charging status display method of the mobile communication terminal, characterized in that it is made to determine that the charging is completed when detected.