KR200399021Y1 - Usb device for gsm terminal - Google Patents

Abstract

The present invention relates to a USB device for a GSM terminal, comprising: a USB jack connected to a USB port and having a first power terminal to which a voltage of the USB port is applied, and a first data line for transmitting and receiving data to and from the USB port; A charging control unit electrically connected to the power terminal, a second power terminal electrically connected to the charging control unit and connected to the second cradle, and supplying a voltage of the USB port transmitted through the charging control unit to the GSM terminal, Third data connected to a first cradle, a third power supply terminal, and a second data line having a third power supply terminal and a second data line for data transmission and reception with a GSM terminal, and third data for data transmission and reception with a USB port; A USB interface including a line, an interface unit for interfacing data transmission and reception between the USB port and the GSM terminal, and a fourth data line for data transmission and reception with the USB port. And a switch unit disposed between the first data line and the fourth data line to switch the first data line to the fourth data line, wherein the interface unit is turned on or off depending on whether the voltage of the third power supply terminal is applied. It is characterized by.

Description

USB device for USB device {USB DEVICE FOR GSM TERMINAL}

The present invention relates to a USB device for a GSM terminal, specifically, charging a GSM terminal by connecting a cradle provided in a GSM (Global System for Mobile communication) terminal and a USB port of a computer, data transmission and data between the computer and the GSM terminal. The present invention relates to a USB device for a GSM terminal capable of performing a storage function.

In recent years, as the mobile terminal becomes more common and its functions are improved, USB devices for charging the mobile terminal and transmitting and receiving data with a computer have been widely used. Conventional USB devices are provided in various forms such as compact accessories as well as cable types.

Meanwhile, the GSM type mobile terminal currently adopted in Europe uses a serial communication method as a data transmission method. Therefore, when the conventional CDMA-type USB device is connected to the USB port of the computer and the GSM terminal, there is a problem in that data transmission and reception cannot be performed because the data communication method is different between the USB port and the GSM terminal.

In addition, in the case of the conventional USB device by simply connecting the computer and the mobile terminal to transfer the voltage applied to the USB port to the mobile terminal to charge the mobile terminal. Therefore, whenever a mobile terminal is charged, a connection with a USB port or a power source of a computer is essential, and when the battery of the mobile terminal is discharged in a place where there is no computer or a separate power source, there is a problem in that it cannot be charged.

The present invention is to solve the above problems, an object of the present invention is to interconnect the connection between the USB port of the computer and the cradle of the GSM terminal to support the charging of the GSM terminal and data transmission and reception between the computer and the GSM terminal, and to store the data It is to provide a USB device for GSM mobile terminals that can serve as a memory.

In other words, the present invention receives the voltage applied to the USB port of the computer and charges the battery provided therein, and boosts the voltage charged in the battery to the voltage used in the GSM terminal to supply the GSM terminal with the applied voltage of the USB port. It is an object of the present invention to provide a USB device for a GSM terminal capable of charging a GSM terminal as well as charging a GSM terminal using a power source charged in the battery if there is no computer.

In addition, the present invention supports the transmission and reception of data between the computer and the GSM terminal by interfacing the USB port and the GSM terminal of a computer using a different communication method, and for a GSM terminal that can be used as a portable storage device when the GSM terminal is not connected It is an object to provide a USB device.

In order to achieve the above object, the USB device for GSM terminal according to the present invention, charging the GSM terminal having a second cradle having an 11-pin connection terminal, and transmits and receives data between the computer's USB (USB) port and the GSM terminal A USB device for a GSM terminal that supports a USB terminal, the USB jack being connected to a USB port and having a first power terminal to which a voltage of the USB port is applied and a first data line for transmitting and receiving data with the USB port. A second power terminal electrically connected to the charging control unit, electrically connected to the charging control unit, connected to the second cradle, and supplying a voltage of the USB port transferred through the charging control unit to the GSM terminal, and a voltage of the GSM terminal applied thereto. Connected to the first cradle, the third power supply terminal and the second data line having a second data line for transmitting and receiving data with the third power terminal and the GSM terminal, the data with the USB port An interface unit for transmitting and receiving data between the USB port and the GSM terminal, a USB memory including a fourth data line for transmitting and receiving data with the USB port, and a first data line It is provided between the four data lines, the switch unit for turning on / off the connection between the first data line and the fourth data line, characterized in that the interface unit is turned on / off depending on whether the voltage of the third power supply terminal.

Preferably, the USB device for GSM terminal is electrically connected to the charging control unit, is electrically connected to the battery and the second power terminal for charging and receiving the voltage of the USB port, the voltage output from the battery using the GSM terminal A booster further boosts the voltage. The interface unit may further include a first resistor disposed between the charging control unit and the switch unit, and the switch unit may be provided between the first data line and the third data line, depending on whether the voltage of the charging control unit is applied through the first resistor. Selectively switching between the first data line, the fourth data line, and the third data line. In addition, the USB device for the GSM terminal further includes a second resistor between the first data line and the switch, and the switch unit is connected between the first data line and the fourth data line depending on whether the voltage of the USB port is applied through the second resistor. Turn on / off.

Hereinafter, with reference to the accompanying drawings will be described in detail the advantages, features and preferred embodiments of the present invention.

1 is a block diagram of a USB device for a GSM terminal according to an embodiment of the present invention. The USB device for a GSM terminal (hereinafter, referred to as a "USB device") of the present embodiment is a USB jack 10 for connecting a USB port (not shown) of a computer and a USB device for a GSM terminal. The first cradle 20 connected to the second cradle 210, the interface unit 30 for supporting data communication between the computer and the GSM terminal, and the USB port and interface of the computer depending on whether the first cradle and the second cradle are connected GSM unit using the applied voltage of the switch unit 40 for switching the connection between the negative or USB memory, the USB memory 50 for storing data, the LED controller 60 for controlling the operation of the LED lamp, the USB port of the computer Charge control unit 70 for controlling the charging of the battery 80, the voltage supplied from the USB port is charged and a boosting unit 90 for boosting the voltage charged in the battery to the voltage used in the GSM terminal. The USB device 100 according to the present embodiment simultaneously performs 1) a charging function of the GSM terminal 200, 2) a data transmission / reception function between a computer and a GSM terminal, and 3) a portable storage function. Hereinafter, the configuration and operation of each component will be described according to each function of the USB device 100 according to the present embodiment.

1. Charging the GSM terminal

When the USB device 100 is connected to the computer and the GSM terminal, respectively, an applied voltage of the USB port is supplied to the GSM terminal through the USB device to charge the GSM terminal. Specifically, when the USB jack 10 is connected to the USB port of the computer and the second cradle 210 and the first cradle 20 of the GSM terminal are connected, the voltage (USB_B +) applied to the USB port is the power of the USB jack. After being supplied to the USB device through the terminal, it is supplied to the battery of the GSM terminal through the first cradle and the second cradle. At this time, the first cradle 20 and the second cradle 210 are connected to each other using an 11-pin connection terminal.

When the USB jack 10 is connected to the USB port, + 5V is applied to the input terminal of the charging control unit 70 by the voltage applied to the USB port, and the charging control unit generates a charging voltage and a current suitable for the GSM terminal to generate a battery (80). ). Specifically, the charging control unit 70 inputs a DC voltage of 4.2V to 4.7V to the battery 80, and the battery is charged with a voltage of 3.7V. In addition, when the first cradle 20 is connected to the second cradle 10, the voltage of 3.7V charged in the battery 80 is boosted to 5V through the booster 90, and 5V is applied to Phone_B + of the first cradle. Is supplied and charged to the battery of the GSM terminal. In the case of the GSM terminal 200, a charger controller is built therein so that a voltage of 5 V is applied. Therefore, since the charging cannot be performed using the 3.7V voltage output from the battery 80, the voltage of the battery is boosted by the booster 90 to 5V and then supplied to the GSM terminal to charge the GSM terminal.

Meanwhile, when the battery of the GSM terminal 200 is discharged, the USB device 100 may be connected to the GSM terminal even in a place where there is no computer, thereby charging and operating the GSM terminal using power of the battery 80.

In addition, the USB device 100 includes a light emitting diode LED3 to indicate the charging state of the GSM terminal 200. Therefore, the user can determine whether the GSM terminal is fully charged by turning on the light emitting diode LED3 when the GSM terminal is being charged and turning off the LED when the charging is completed.

2. Data transmission and reception between computer and GSM terminal

When the USB jack 10 and the first cradle 20 are respectively connected to the USB port of the computer and the second cradle 210 of the GSM terminal 200, the USB device 100 supports data transmission and reception between the computer and the GSM terminal. do.

Specifically, a voltage of about 4V is applied to the Phone_B- voltage corresponding to the DC voltage of the battery of the GSM terminal, while the applied voltage is applied to the interface unit 30 together. Therefore, a low signal is input to the switch unit as a control signal, and the two switches of the switch unit 40 are held upward so that the USB data lines D + and D- of the USB jack 10 are connected to the GSM terminal. It is connected to the serial data lines (Rx, Tx) of the (200), the data line is connected between the USB port of the computer and the second cradle of the GSM terminal. On the other hand, by using the one-chip custom chip as the interface unit 30 by converting the USB signal of the USB port to the serial signal of the GSM terminal to enable data transmission and reception through the data line. Therefore, it is possible to send and receive data such as address book, personal schedule and various files between the computer and the GSM terminal.

Whether data is transmitted and received between the computer and the GSM terminal 200 is indicated by the light emitting diode LED1.

3. Portable storage device

When the connection between the USB device 100 and the GSM terminal 200 is released, that is, when the connection between the first cradle 20 and the second cradle 210 is released, the voltage of the GSM terminal 200 (Phone_B- Voltage) is released, so that the voltage applied to the interface unit 30 is released. Therefore, the voltage of Phone_B +, which is the charging voltage from the charging control unit 70, is directly applied to the switch unit 40 through the resistor R5 in the interface, and a high signal is input to the switch unit as a control signal. Therefore, two switches of the switch unit 40 are attached downward, and the data lines D + and D- of the USB jack 10 are connected to the USB data lines U-D + and UD- of the USB memory 50. do. Therefore, the USB device 100 may be used as a portable storage device through the USB controller 52 and the flash memory 55.

When the data line of the USB jack 10 is connected to the USB data line of the USB memory 50 and the USB device 100 is used as a portable storage device, the light emitting diode LED2 is turned on and displayed.

2 is a view for explaining the automatic switching mode of the USB device for GSM terminal according to the present embodiment. The USB device 100 supports the automatic switching between data communication or portable storage function between the computer and the GSM terminal by operating the switch 40 according to whether the first cradle 20 and the second cradle 210 are connected. . That is, the mode is automatically switched by operating the switching unit 40 using the charging voltage Phone_B + and the voltage of the GSM terminal Phone-B- as the control input.

First, when the first cradle 20 is connected to the second cradle 210, a charging voltage (Phone_B- voltage) of about 4V of the GSM terminal battery is applied, and this voltage is applied to the resistor R5 of the interface unit 30. Through the ground state. Therefore, since a low signal is input to the switch unit 40 as a control signal, two switches of the switch unit connect the USB data lines D + and D- of the USB jack 10 and the serial data lines Rx and Tx. Therefore, it forms a data communication structure, that is, a data link between the GSM terminal 200 and a computer.

Meanwhile, when the first cradle 20 is separated from the second cradle 210, the Phone_B- voltage supplied from the GSM terminal 200 is released and the phone_B + charging voltage supplied by being boosted by the booster 90 is interface part. (30) is applied to the switch unit 40 via a resistor (R5). Therefore, since a high signal is input to the switch unit 40 as a control signal, two switches of the switch unit are connected to the data lines D + and D- of the USB jack 10 and the USB data line U-D + of the USB memory 50. , UD-). Therefore, the USB data communication structure between the computer and the USB memory 50 is formed so that the USB device 100 can be used as a portable storage device.

The mode switching between the data communication between the computer and the GSM terminal or the portable storage function may be performed in various forms using the data or voltage state of each pin of the cradle, in addition to the connection between the first cradle 20 and the second cradle 210. It may be made, it may be controlled manually by having a switch on the ground terminal of the first cradle (20).

3 is a diagram illustrating a configuration of an LED controller. In general, the USB data lines D + and D- of the USB jack 10 alternately exchange values of 3V and 0V, and logically alternate between low and high rapidly in case of data communication. It is. The cycle of this logic signal is so fast that it cannot be observed with the naked eye. The AND logic 61 of the LED controller 60 allows the USB data lines D + and D- to be high only when they are all at the same logic level, thereby lowering the period and further reducing the frequency of the counter 62. By applying logic, it is possible to observe the data communication state, that is, the presence or absence of data communication, with the naked eye during data communication. The final output of the counter 92 turns on / off the external data communication light emitting diode LED1.

FIG. 4 is a configuration diagram of another embodiment of the USB device for GSM terminal. The switch unit 40 of the USB device for GSM terminal shown in FIG. 1 is provided in the USB memory 50. As shown in FIG. The operation of the USB device according to the present embodiment will be described below.

When the USB device 100 and the GSM terminal 200 are connected, the charging voltage of the GSM terminal 200 is applied to the interface unit 30 and the 11 pin of the first cradle 20 is grounded. Therefore, a low signal is applied to the switch unit 45 as a control signal so that the two switches are turned off. Therefore, data lines D + and D− of the USB jack 10 and serial communication lines Rx and Tx of the GSM terminal 200 are interconnected to form a data link between the computer and the GSM terminal 200. In this case, the USB DC power (USB_B +) of the USB jack 10 is applied to the charging control unit 70 to output the charging voltage (Phone_B +) to charge with the battery of the GSM terminal 200, the battery of the GSM terminal is sufficiently Of course, if the charge is stopped. Data transmission and reception between the computer and the GSM terminal is indicated by LED1, and whether or not the GSM terminal is charged is indicated by LED3.

In addition, when the USB device 100 is separated from the GSM terminal 200, the interface unit 30 that operates using the power of the GSM terminal 200 stops the operation. Therefore, the data lines D + and D− of the USB jack 10 are physically separated from the serial communication lines Rx and Tx of the GSM terminal 200. At this time, since the voltages applied to the data lines D- and D + of the USB jack 10 are applied to the switch unit 45 through the resistors R3 and R4, a high signal is input to the switch unit. The switch is turned ON. Therefore, the data lines D- and D + of the USB jack 10 and the USB data lines U_D + and D_D- of the USB memory 50 are interconnected to use the USB device 100 as a portable storage device. That is, the USB control unit 52 and the flash memory 55 can read and write data or files of each other. This data read and write operation is displayed via the LED2 by the USB controller 52.

Although the present invention has been described with reference to some preferred embodiments, this is exemplary and various modifications may be made by those skilled in the art. Therefore, the scope of the technical spirit of the present invention should be understood as defined by the appended claims rather than specific embodiments.

As described above, the USB device for a GSM terminal according to the present invention not only provides a function of charging a GSM terminal, transmitting and receiving data between the computer and the GSM terminal, and a portable storage device, but also using a battery inside the GSM even when there is no computer. There is an effect that can charge the terminal.

In other words, a USB device for a GSM terminal of the present invention,

First, since the power supplied from the USB port of the computer is supplied to the GSM terminal via the battery, the battery can be charged at any time, so that the GSM terminal can be charged and operated even when the battery of the GSM terminal is discharged in a place without a computer. .

Secondly, since the voltage output from the battery is boosted to the voltage used in the GSM terminal through the boosting unit, the battery and the GSM terminal can be simultaneously charged.

Third, data communication between the computer and the GSM terminal is possible by interfacing different communication methods between the USB port and the GSM terminal through the interface unit.

Fourth, the data line of the USB jack is selectively connected to the interface unit or the USB control unit at the same time, thereby preventing failure or malfunction.

Fifth, the switching between the data transmission and reception mode and the portable storage mode between the computer and the GSM terminal is automatically performed depending on whether the GSM terminal is connected or not.

Finally, the user can easily grasp the state of charge of the GSM terminal, the state of transmitting and receiving data with the computer, the state of using the USB memory, etc. through the LED lamp.

1 is a block diagram of a USB device for a GSM terminal according to the present invention.

2 is a view for explaining the automatic switching mode of the USB device for GSM terminal according to the present invention.

3 is a view showing the configuration of the LED control unit according to the present invention.

Figure 4 is a block diagram of another embodiment of a USB device for GSM terminals according to the present invention.

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

10: USB jack 20: first cradle

30: interface unit 40, 45: switch unit

50: USB memory 52: USB control unit

55: flash memory 60: LED control unit

70: charge control unit 80: battery

90: booster 100: USB device for GSM terminal

200: GSM terminal 210: Second cradle

Claims (4)

A USB device for a GSM terminal that charges a GSM terminal having a second cradle having an 11-pin connection terminal and supports data transmission and reception between a USB (USB) port of a computer and the GSM terminal. A USB jack connected to the USB port and having a first power terminal to which a voltage of the USB port is applied and a first data line for transmitting and receiving data with the USB port; A charging controller electrically connected to the first power terminal; A second power terminal electrically connected to the charging control unit and connected to the second cradle, the second power terminal supplying a voltage of the USB port transmitted through the charging control unit to the GSM terminal, and a third voltage applied to the GSM terminal; A first cradle having a power supply terminal and a second data line for transmitting and receiving data with the GSM terminal; An interface unit connected to the third power supply terminal and the second data line and having a third data line for transmitting / receiving data to / from the USB port and interfacing data transmission / reception between the USB port and the GSM terminal; A USB memory having a fourth data line for transmitting and receiving data with the USB port; And A switch unit provided between the first data line and the fourth data line to turn on / off a connection between the first data line and the fourth data line; And the interface unit is turned on / off depending on whether the voltage of the third power terminal is applied. The method of claim 1, The USB device for the GSM terminal, A battery electrically connected to the charging control unit and charged with a voltage of the USB port; And And a booster electrically connected to the second power terminal and boosting a voltage output from the battery to a voltage used by the GSM terminal. The method of claim 1, The interface unit further includes a first resistor disposed between the charging control unit and the switch unit, The switch unit is provided between the first data line and the third data line, and the first data line, the fourth data line and the third data according to whether the voltage of the charging control unit is applied through the first resistor. USB device for GSM terminal, characterized in that for selectively switching between lines. The method of claim 1, The USB device for the GSM terminal further includes a second resistor between the first data line and the switch, And the switch unit turns on / off a connection between the first data line and the fourth data line according to whether the voltage of the USB port is applied through the second resistor.