KR20030042681A - Cellular phone terminal apparatus equipped charging unit and power selection unit selecting charging power electively and its method operating the same - Google Patents

Abstract

PURPOSE: A mobile phone terminal embedding a power selecting unit and a charging unit and a method therefor are provided to select one power among an internal charge power, an external charge power, and a bus power of a USB(Universal Serial Bus), and supply and charge the selected power. CONSTITUTION: A Carkit connector unit(200) receives a power from an external power supply device(800), and outputs a power signal including an external charge power signal(130), an internal charge power signal(110), and a bus power signal(120) of a USB. A power selecting unit(300) receives the internal charge power signal(110) and the bus power signal(120) of the USB, and outputs the first charge power signal(140) and a USB sensing signal(160). A charging unit(400) charges a charger(700) and supplies the power to a central power supply unit(600) by the first charge power signal(140) outputted from the power selecting unit(300). A terminal central control unit(500) receives the USB sensing signal(160) from the power selecting unit(300), and outputs a control signal(170) to the charging unit(400) and the central power supply unit(600). The central power supply unit(600) converts the second charge power signal(150) from the charging unit(400) into a power supply signal(180) suitable for various internal circuits(1000), and outputs the power supply signal(180).

Description

TECHNICAL FIELD [0001] Cellular phone terminal apparatus equipped with a power selector and a charging unit for selecting a charging power and a method thereof

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the field of charging technology for mobile phone terminals, and more particularly, to a power supply signal for internal charging, a power signal for external charging, and a universal serial bus (USB: Universal Serial Bus) generally supported by a carkit interface. The present invention relates to a mobile phone terminal device having a power selector and a charging unit for selecting a charging power, which enables power supply and charging of a mobile phone terminal by utilizing a bus power (Vbus).

In the existing code division multiple access (CDMA) terminal, an external charger is mainly used, and it does not support the Universal Serial Bus (USB) interface or is a separate and independent device for charging. It was composed of modules.

As the third generation IMT2000 terminal has various types of services and in particular, the transmission speed of wireless data services is improved, its utilization is increasing. The mobile terminal device receives the data service, such as the method of receiving the service by the terminal itself, and the method of accessing the service as a CDMA wireless modem by accessing the desktop PC or a notebook computer through a universal serial bus. In this case, the terminal needs a larger capacity of a rechargeable battery to receive a sufficient power supply, or an additional charging circuit external to the terminal device is required.

The present invention is proposed to solve the above problems, one of the internal power supply and the external power supply and the bus power supply (Vbus) of the universal serial bus (USB) supported by the Carkit Interface (Carkit Interface) An object of the present invention is to provide a mobile phone terminal device and a method thereof for selecting a power source for powering and charging a mobile phone terminal.

That is, the present invention generally solves the above problems by implementing a power selection circuit and a charging circuit in the terminal to select a power source provided by a carkit interface and a universal serial bus (USB) interface.

1 is an overall configuration diagram of an embodiment of a mobile phone terminal device according to the present invention.

Figure 2 is a detailed configuration diagram of an embodiment of a power selection unit of a mobile phone terminal device according to the present invention.

Figure 3a is a detailed configuration of an embodiment of the charging unit of the pulse charging method of the mobile phone terminal device according to the present invention.

Figure 3b is a detailed configuration diagram of an embodiment of the charging unit of the linear charging method of the mobile terminal device according to the present invention.

Figure 4 is a flow diagram of an embodiment of a charging method of a mobile phone terminal device according to the present invention.

* Explanation of symbols for the main parts of the drawings

100: mobile phone terminal device 200: carkit connector

300: power selection unit 400: charging unit

500: terminal central control unit 600: terminal central power supply

700: rechargeable battery 800: external power supply

900: general purpose serial bus detector 1000: circuits in various terminals

In order to achieve the above object, the present invention provides a mobile terminal device having a power selection unit and a charging unit for selecting a charging power, receiving power from an external power supply means for external charging power signal and internal charging power supply. Carkit connector means for outputting a power signal including a signal and a bus power (Vbus) signal of a universal serial bus (USB); Power selection means for receiving the internal power supply signal and the bus power signal of the universal serial bus from the kit connector and outputting a first charging power signal selected from the signal and a universal serial bus detection signal; Charging means for converting the first charging power signal selected from the power selection means into a second charging power signal to charge a rechargeable battery with the second charging power signal and at the same time supplying power to the central power supply means of the terminal; Central control means for receiving a universal serial bus detection signal from the power selection means and controlling various circuits in the terminal in accordance with the detection signal; And a central power supply unit for receiving the second charging power signal from the charging unit and converting the second charging power signal into various kinds of power required inside the terminal.

On the other hand, the present invention is a method applied to a mobile terminal device having a power selector and a charging unit for selecting a charging power, the power signal received from the power supply means outside the mobile phone terminal, the power signal for internal charging, external charging A first step of outputting a power signal including a power power signal and a bus power signal of a general-purpose serial bus; A second step of selecting a first charging power signal from an internal charging power signal output in the first step and a bus power signal of a universal serial bus; And converting the first charging power signal selected in the second step into a second charging power signal through charging means to charge the rechargeable battery of the mobile phone terminal, and outputting the second charging power signal to the central power supply means of the terminal. It characterized in that it comprises a third step.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the description of the present invention, the power supply signal for external charging output from the kit connector means means a power signal that is already formed in the charging unit outside the terminal and flows into the terminal, which is an output of an external charger according to the prior art. Contains a signal.

On the other hand, the power signal for internal charging refers to a power signal flowing directly into the terminal from the external power supply means without a separate charging circuit to the outside of the terminal, the power signal is a charge of the terminal through the charging unit inside the terminal Will be charged.

On the other hand, the mobile phone terminal device with a built-in charging unit does not mean a mobile phone terminal device with a built-in rechargeable battery, but means a mobile phone terminal device with a built-in charging circuit.

1 is an overall configuration diagram of an embodiment of a mobile phone terminal device according to the present invention.

As shown in FIG. 1, the mobile phone terminal device 100 according to the present invention receives power from the power supply device 800 outside the terminal and receives the external power supply signal 130 and the internal power supply signal 110. And a kit connector (200) for outputting a power signal including a bus power (Vbus) signal 120 of a universal serial bus (USB). Power selection for receiving the internal charging power signal 110 and the bus power signal 120 of the universal serial bus and outputting the selected first charging power signal 140 and the universal serial bus detection signal 160 among the signals The charging unit for charging the rechargeable battery 700 using the first charging power signal 140 selected from the power supply selecting unit 300 and the power supply to the central power supply unit 600 of the terminal (300) 400), the general-purpose serial bus detection signal from the power selector 300 The terminal charging unit 400 and the terminal central control unit 500 for outputting the control signal 170 to the central power supply unit 600 of the terminal, and the second charging power signal 150 from the charging unit 400 And a central power supply unit 600 for converting and outputting a power supply signal 180 suitable for various circuits 1000 inside the terminal.

In particular, the power selector 300 includes a universal serial bus detector 900 therein, and when only the universal serial bus power signal (USB-Vbus) 120 is output from the kit connector 200, The bus power signal 120 is sensed through the internal serial bus detector 900, and the detection signal 160 is output to the terminal central controller 500.

On the other hand, when the power supply signal 130 for external charging is output from the kit connector 200, the external power supply signal in priority to the internal power supply signal 110 and the bus power signal 120 of the universal serial bus. The rechargeable battery 700 of the terminal is charged with the power signal 130, and power is supplied to the central power supply unit 600.

Meanwhile, the terminal central power supply unit 600 receives a power source of the rechargeable battery 700 and a second charging power source 150 or an external charging power source 130 and converts it into various types of power required by the terminal. These are commonly referred to as converters and low dropout regulators (LDOs).

2 is a detailed configuration diagram of an embodiment of a power selection unit of a mobile phone terminal device according to the present invention.

2 is only one embodiment composed of a known switch circuit for implementing the power selector 300 according to the present invention, and implements the power selector 300 and the universal serial bus detector 900 according to the present invention. In addition, it is not limited to the circuit shown in FIG.

Referring to Figure 2 in more detail as follows.

FET (Field Effect Transistor, hereinafter referred to as FET) 1 210 is a P-channel FET, and FET 2 220 is an N-channel FET and forms a kind of switch circuit together with a Zener Diode (ZD). When only the internal charging power signal 110 is input from the carpet connector 200, the internal charging power signal 110 is output as the first charging power signal 140, and the bus power of the universal serial bus is output. When only the signal 120 is inputted, the bus power signal 120 is output as the first charging power signal 140 and at the same time, a BJT (Bipolar Junction Transistor) 240 and a general-purpose serial bus detector having resistors ( 900 is driven to output the universal serial bus detection signal 160.

In addition, when the internal charging power signal 110 and the bus power signal 120 of the universal serial bus are simultaneously input, the internal charging power signal 110 is output as the first charging power signal 140.

Figure 3a is a detailed configuration diagram of an embodiment of the pulse charging method 400 of the mobile phone terminal device according to the present invention, as shown in the figure using a chip ("LTC1730ESB-42" of "Linear Technology") Implemented.

Figure 3b is a detailed configuration diagram of an embodiment of the charging unit 400 of the linear charging method of the mobile phone terminal device according to the present invention, as shown in the figure using a chip ("LTC1732-4" of "Linear Technology") Implemented.

3A and 3B are merely exemplary embodiments of a known circuit for implementing the charging unit 400 according to the present invention, and in implementing the charging unit 400 according to the present invention. And the circuit shown in FIG. 3B. However, the charging unit 400 in the mobile phone terminal device according to the present invention is preferably provided with the following general functions.

That is, when the charging power supply is stopped or lower than the rechargeable battery power, it automatically switches to the non-operation state, the surge prevention function of the initial charging input power, and detects the charging state to automatically perform the charging operation when the charging is completed. It is desirable to have a function including a stop function, a function of detecting a state of charge and automatically restarting the charge when the battery voltage falls below the reference voltage, and a trickle charge function.

On the other hand, the charging unit 400 receives 4.5V-5.25V, 1A as an input power supply, the rectification is made between 4.25V to 4.15V, it is preferable to charge 400mA.

4 is a flowchart illustrating a charging method of a mobile phone terminal device according to the present invention.

As shown in FIG. 4, a charging method of a mobile terminal device including a power selecting unit and a charging unit for selecting charging power according to the present invention includes the following process.

First, a power signal is received from an external terminal (401). In general, power input from an external device may include an internal charging power signal supported by a carkit interface, an external charging power signal, and a bus power (Vbus) signal of a universal serial bus (USB). .

Next, it is determined whether or not an external charging power signal is input (402).

As a result of the determination, when it is confirmed that the power signal for external charging is input, the rechargeable battery is charged with the power signal for external charging in preference to the other power signal, and is output to the central power supply of the terminal (403).

Next, the central power supply unit converts and supplies a power signal suitable for various circuits in the terminal (404).

Meanwhile, in the process of determining whether the external charging power signal is input (402), when it is determined that the external charging power is not input, it is determined again whether only the internal charging power is input (405). .

If it is determined that only the internal charging power is input, the internal charging power signal is input to the charging unit as the first charging power signal (407).

Subsequently, the rechargeable battery is charged using the second charging power signal, which is an output signal of the charging unit, and the second charging power is output to the central power supply unit (408).

Finally, the central power supply unit supplies power suitable for various circuits in the terminal (409).

On the other hand, in determining whether only the internal charging power is input (405), if it is confirmed that only the internal charging power is not input, it is again determined whether only the bus power of the universal serial bus is input (406). ).

If it is determined that only the bus power of the universal serial bus is input, the bus power signal of the universal serial bus is input to the charging unit as the first charging power signal, and the universal serial bus detection signal is output to the central controller (410).

Subsequently, the central controller executes a control operation corresponding to the detection signal of the general-purpose serial bus to various circuits in the terminal (411).

Subsequently, the rechargeable battery is charged using the second charging power signal, which is an output signal of the charging unit, and the second charging power is output to the central power supply unit (408).

Finally, the central power supply unit supplies power suitable for various circuits in the terminal (409).

On the other hand, in determining whether only the bus power of the general purpose serial bus is input (406), when it is determined that only the bus power of the general purpose serial bus is not input (that is, the internal power supply and the bus power of the general purpose serial bus are At the same time, the internal charging power signal is input to the charging unit as the first charging power signal (407).

Subsequently, the rechargeable battery is charged using the second charging power signal, which is an output signal of the charging unit, and the second charging power is output to the central power supply unit (408).

Finally, the central power supply unit supplies power suitable for various circuits in the terminal (409).

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes are possible in the art without departing from the technical spirit of the present invention. It will be apparent to those of ordinary knowledge.

As described above, the present invention may use a general adapter having a common carkit interface as well as an external charger previously used when charging a mobile phone terminal, and also supports a USB-Vbus signal supported on a common carkit interface. There is also an effect that can be used as a charging power source.

In addition, there is an effect that can solve the power supply problem when the service is provided by accessing a personal computer or a laptop, especially among the data services of the mobile communication terminal which will be gradually expanded in the future.

Claims (8)

In the mobile phone terminal device, Receiving power from the power supply means outside the terminal, outputting a power signal including a power signal for external charging, a power signal for internal charging, and a bus power (Vbus) signal of a universal serial bus (USB). Carkit Connecter means for; Power supply selecting means for receiving the internal power supply signal and the bus power signal of the universal serial bus from the kit connector, and outputting a first charging power signal selected from the signal and a universal serial bus detection signal; Charging means for converting the first charging power signal selected from the power selection means into a second charging power signal to charge a rechargeable battery with the second charging power signal and at the same time supplying power to the central power supply means of the terminal; Central control means for receiving a universal serial bus detection signal from the power selection means and controlling various circuits in the terminal in accordance with the detection signal; And Central power supply means for receiving the second charging power signal from the charging means for converting and outputting to the various power required inside the terminal Mobile terminal device with a built-in power selector and a charging unit for selecting a charging power including a. The method of claim 1, The power selection means, And a universal serial bus detection means for detecting a bus power signal of the universal serial bus and outputting a universal serial bus detection signal when only the bus power signal of the universal serial bus is input from the kite connector means. A mobile terminal device having a built-in power supply and a power selector for selecting a charging power to. The method according to claim 1 or 2, The power selection means, When only the internal charging power signal is received from the kit connector, the internal power supply signal is output. When only the bus power signal of the universal serial bus is received, the bus power signal and the universal serial bus detection signal are output. And a power selection unit for selecting a charging power source and a charging unit for outputting an internal charging power signal when the internal charging power signal and the bus power signal of the universal serial bus are simultaneously input. Terminal device. The method of claim 1, When the power supply signal for external charging is output from the kite connector means, the rechargeable battery of the terminal is directly charged with the external power supply signal in preference to the internal power supply signal and the bus power signal of the universal serial bus. A mobile terminal apparatus having a power selection unit and a charging unit for selecting the charging power, characterized in that for supplying power to the central power supply means. The method of claim 1, The power supply means outside the terminal, Preferably, a mobile terminal device having a power selection unit and a charging unit for selecting a charging power, characterized in that it comprises a cigar-jack, a desktop personal computer, a notebook computer of a car. In the method of a mobile phone terminal device, A first step of receiving a power signal from a power supply means external to the mobile phone terminal and outputting a power signal including an internal charging power signal, an external charging power signal, and a bus power signal of a universal serial bus; A second step of selecting a first charging power signal from an internal charging power signal output in the first step and a bus power signal of a universal serial bus; And Converting the first charging power signal selected in the second step into a second charging power signal through charging means to charge the rechargeable battery of the mobile phone terminal, and outputting the second charging power signal to the central power supply means of the terminal; 3rd step Method of mobile phone terminal device with a built-in power selector and a charging unit for selecting a charging power comprising a. The method of claim 6, When the external power supply signal is output in the first step, the external battery power supply signal and the bus power signal of the universal serial bus are given priority, and the rechargeable battery of the terminal is used as the external power supply signal without selecting. A fourth step of charging; And A fifth step of outputting the external power supply signal to the central power supply means of the terminal; The method of the mobile terminal device with a built-in power supply and the power selection unit for selecting a charging power further comprising. The method of claim 6, The second step, A fourth step of selecting an internal charging power signal as the first charging power signal when outputting only an internal charging power signal as a power signal in the first step; A fifth step of selecting an internal charging power signal as the first charging power signal when the internal power supply signal and the bus power signal of the universal serial bus are simultaneously output as the power signal in the first step; And When only the bus power signal of the universal serial bus is output as the power signal in the first step, the bus power signal of the universal serial bus is selected as the first charging power signal, and the detection signal of the universal serial bus is a signal inside the terminal. Sixth step of outputting to the central control means in charge of control Method of mobile phone terminal device with a built-in power selector and a charging unit for selecting a charging power comprising a.