WO2005112220A1

WO2005112220A1 - A portable electronic equipment and an extending head of the equipment and a charging interface of the charging device of the equipment

Info

Publication number: WO2005112220A1
Application number: PCT/CN2005/000687
Authority: WO
Inventors: Pengliang Yang; Yankai Niu
Original assignee: Huawei Technologies Co., Ltd.
Priority date: 2004-05-18
Filing date: 2005-05-18
Publication date: 2005-11-24
Also published as: CN2739695Y

Abstract

The present invention disclosed a portable electronic equipment and an extending head of the equipment and a charging interface of the charging device of the equipment, said portable electronic equipment included at least a USB interface, a USB accept/deliver device and a charging unit, said USB interface included two data ends, a power supplying end and a grounding end, said data end connected with the data ends of the USB accept/deliver device, said power supplying end connected with the power supplying end of the USB accept/deliver device and the power supplying end of the charging unit. The extending head included an input USB interface, a charging interface and an output interface, the output interface connected with the USB interface and the charging interface, respectively. The charging interface can plug in the USB interface, and the mandril of it connected with the ground of the charging device. The present invention can complete the function of using one USB interface to transfer data and charge, and to deduce the number of the interface of a portable electronic equipment, reduce the cost, and be more convenient to the user.

Description

Portable electronic device, expansion head thereof, and charging interface of charging device thereof

The present invention relates to an electronic device interface technology, and in particular, to a portable electronic device, and an expansion head and a charging interface of a charging device thereof. BACKGROUND OF THE INVENTION With the widespread application of USB technology, the USB interface has become one of the standard data communication interfaces for electronic devices such as mobile phones, PDAs, and handheld computers. However, in current electronic devices, the USB interface is only connected to USB transceivers. A separate data communication interface can only be used for data transmission and cannot be used for charging. The charging interface is only connected to the charging unit and is also a separate charging interface that can only be used for charging. The user needs to use two sets of cables for data transmission and charging of the electronic device, which are plugged into the portable electronic device and the charging interface.

Because the USB interface and the charging interface are separated from each other in current electronic equipment, two interfaces need to be designed separately during production, which has a high cost. The user needs to identify the type of interface when using it, so it is not convenient to use. In addition, electronic devices generally need to be as small as possible, and the appearance needs to be simple and beautiful. The separation of the two interfaces not only increases the size of the electronic device, but also affects Up appearance. SUMMARY OF THE INVENTION In view of this, the main object of the present invention is to provide a portable electronic device, so that the portable electronic device can perform data communication and charging functions using only a USB interface.

Another object of the present invention is to provide an expansion head of a portable electronic device, thereby achieving. Portable electronic devices use USB cables and chargers for USB data transmission and charging. Another object of the present invention is to provide a charging interface of a charging device for a portable electronic device, so that the charging device can charge the portable electronic device through a USB interface.

To achieve the foregoing objective, the technical solution of the present invention is specifically implemented as follows:

A portable electronic device includes at least a USB interface, a USB transceiver, and a charging unit. The USB interface includes two data terminals, a power supply terminal, and a ground terminal. The data terminal of the USB interface and the USB transceiver The data line of the device is connected, and the power supply end of the USB interface is connected to the power supply line of the USB transceiver device and the power supply line of the charging unit.

The portable electronic device further includes a CPU, connected to the USB transceiver and the charging unit, and configured to control the USB transceiver and the charging unit.

The charging unit includes a charging circuit and a charging management module. The power supply terminal of the charging circuit is connected to the power supply terminal of the USB interface. The level status monitoring line of the charging management module is connected to the power supply terminal of the USB interface. Connected.

The charging unit further includes a level generating circuit connected in series between the power supply terminal and the ground terminal of the USB interface, and is used to generate a high level at the power supply terminal of the USB interface when an external cable connector is inserted into the USB interface. When the cable connector is not inserted into the USB interface, a 4 & level is generated at the power supply end of the USB interface.

The charging circuit includes at least one triode, a step-down resistor, a field-effect transistor, and a rechargeable battery. The emitter and collector of the triode, the step-down resistor, the source and drain of the field-effect transistor, and the rechargeable battery. Connected in series; the emitter of the triode is connected to the power supply end of the charging circuit and connected to the power supply end of the USB interface; the charge management module is respectively connected to the CPU, the base of the transistor, the step-down resistor, and the field effect tube The grid and the rechargeable battery are connected to perform charge management control on the triode, the step-down resistor, the field effect transistor, and the rechargeable battery according to a control command of the CPU. The portable electronic equipment is a mobile phone, a handheld computer, and an MP3 player.

The USB interface is a USB plug or a USB socket.

An expansion head of a portable electronic device. The expansion head includes an input USB interface, a charging interface, and an output USB interface. The input USB interface includes two data terminals, a power supply terminal, and a ground terminal. Including a power supply terminal and a ground terminal, the output USB interface includes two data terminal ferrules, a power supply terminal ferrule and a ground terminal ferrule; the data input USB interface is connected to the data terminal ferrule of the output USB interface correspondingly The power supply terminal of the input USB interface is connected to the power supply terminal ferrule of the output USB interface, the ground terminal of the input USB interface is connected to the ground terminal ferrule of the output USB interface, and the power supply terminal of the charging interface is connected to the power supply terminal ferrule of the output USB interface. The ground terminal of the charging interface is connected to the ground terminal ferrule of the output USB interface. The charging interface of the expansion head is a USB plug or a USB socket. The data end of the USB plug or USB socket is correspondingly connected to the data terminal of the output USB interface. The power supply terminal of the USB plug or USB socket is connected to the output USB interface. The power supply terminal of the USB connector is connected, and the ground terminal of the USB plug or USB socket is connected to the ground terminal of the output USB interface. The input USB interface is a USB plug or a USB socket, and the output USB interface is a USB plug or a USB socket.

A charging interface of a charging device for a portable electronic device. The charging interface includes a power supply terminal ferrule and a ground terminal ferrule. The power supply terminal ferrule is connected to the power supply terminal of the charging device, and the ground terminal thereof is connected to the ground terminal of the charging device. The charging interface is matched with the USB interface, and its physical shape is the same as the physical shape of the USB interface. When the charging interface and the USB interface are inserted into each other, it provides a contact between the electrical terminal ferrule and the power supply terminal of the USB interface, and the ground terminal ferrule and The ground terminal in the USB interface corresponds to the contact. The charging interface is a USB plug or a USB socket. The data terminal of the charging interface is empty, the power supply terminal is connected to the power supply terminal of the charging device, and the ground terminal is connected to the ground terminal of the charging device.

Since the portable electronic device according to the present invention combines the power supply end of the USB interface with the charging list The power supply terminal of the unit is connected, so as to charge the electronic device while using the USB interface for data communication; use the charging interface of the present invention to connect the charger with the USB interface of the present invention, so as to independently charge the electronic device. By using the expansion head of the present invention, one USB interface can be expanded into two USB interfaces, or one USB interface can be expanded into a USB interface and a charging interface, so as to complete the USB data communication and charging of the electronic device at the same time. By using the charging interface of the portable electronic device, the expansion head and the charging device of the present invention, data communication and charging functions can be completed with only one USB interface, thereby reducing the number of interfaces of the electronic device, reducing the production cost, and facilitating the user. At the same time, the size of the electronic device is reduced, which is convenient to carry, and it is easier to be simple and beautiful in appearance. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a circuit connection diagram of internal components of a portable electronic device according to the present invention; FIG. 2 is a structural diagram of a charging interface of a charging device for a portable electronic device according to the present invention; Structure diagram of an extension head;

FIG. 4 is a structural diagram of a second expansion head according to the present invention. Mode of Carrying Out the Invention

The following describes the implementation method of the present invention with reference to the drawings and specific embodiments.

The portable electronic device according to the present invention is a mobile phone, a handheld computer or an MP3 player. As shown in FIG. 1, the portable electronic device according to the present invention includes: a USB socket 101, a USB transceiver 102, a central processing unit (CPU) 103, and a charging unit 104.

Among them, the USB interface 101 is a physical interface connecting an electronic device and a USB cable. The USB interface 101 includes two data terminals, which are a D- terminal and a D + terminal, a power supply terminal VBUS, and a ground terminal GD; USB interface 101 The D- and D + ends are connected to the data cables USB— D— N and USB— D_P of the USB transceiver device 102, respectively, and the power supply terminal VBUS of the USB interface 101 is connected to The power supply line USB-VBUS of the USB transceiver device 102 is connected to the power supply terminal E of the charging unit 104 for supplying power to the USB transceiver device 102 and charging the charging unit 104; the ground terminal GND of the USB interface 101 is grounded.

The USB transceiver device 102 is used to complete the conversion and reverse conversion between logic signals and USB transmission signals. In order to save power, the USB transceiver device 102 must support the sleep mode. There are many chips on the market that implement the functions of the USB transceiver device 102. For example, Micron's chip model is MIC2551. The CPU 103 is connected to the USB transceiver 102 through a logical signal interface USB-Interface, and is used to receive and send data and drive and control the USB transceiver.

The charging unit 104 includes: a charging management device 105, a high-power PNP transistor 106, a step-down resistor 107, an enhanced P-channel MOS field effect transistor 108, a rechargeable battery (BATT) 109, and a level generating circuit 110. The rechargeable battery 109 is a lithium-ion or polymer rechargeable battery. The charge management device 105 is a charge management chip. For example, Qualcomm ’s PM1000 integrated chip. Under the control of the CPU 103, the charge management device 105 cooperates with the transistor 106, the step-down resistor 107, and the MOS field effect transistor 108 to complete the charge management function. .

The power supply terminal of the charging unit 104 is the emitter E of the transistor 106, and the power supply terminal VBUS of the USB interface 101 is connected to the power supply terminal E of the charging unit 104. The emitter E and the collector C of the transistor 106, the step-down resistor 107, the source S and the drain B of the field effect transistor 108, and the rechargeable battery are connected in series to form a charging circuit 111. The transistor 106 is used to control the charging current. The charge management device 105 is connected to the base B of the transistor 106 through a control signal line CHG-CTL-N, and outputs different voltages through the signal line CHG-CTL-N to obtain different charging currents flowing through the transistor 106. When the signal line CHG-CTL — When the voltage of N is greater than or equal to the voltage of the power supply line VBUS on the USB interface 101, the charging management device 105 turns off the charging; when the charging current passes through the step-down resistor 107, a certain voltage will be generated on the step-down resistor 107 due to the difference in current magnitude. This voltage drop is sent to the charge management device 105 through the signal line ISNS_P and the signal line ISNS_M of the charge management device 105. After being amplified by the amplifier built in the charge management device 105, and the preset maximum charge Comparing the electric current value IMAXSEL, when the charging current is greater than the maximum charging current, the charging management device 107 turns off the charging; the MOS field effect transistor 108 is used to turn off the charging, and its gate G is connected to the BATJ¾T_CTL terminal of the charging management device 105. When the voltage of the BAT_FET_CTL terminal of the charge management device 105 is greater than or equal to the voltage VBAT of the rechargeable battery 109, the charging is turned off. The VBAT terminal of the charging management module 105 is the voltage terminal of the rechargeable battery 109. When the voltage of the rechargeable battery 109 reaches a predetermined maximum rechargeable battery voltage value VMAXSEL, the power management device 105 turns off charging.

In addition, the level generating circuit 110 is connected in series between the power supply terminal VBUS and the ground terminal GD of the USB interface, and is used to ensure that when the cable connector is not inserted into the USB interface, a low level is generated on the power supply terminal VBUS, and when the cable connector is inserted into the USB interface A high level is generated; the charging management module 105 includes a monitoring module, which is connected to the power supply terminal VBUS of the USB interface through a level status monitoring line, and is used to monitor whether the power supply terminal VBUS is low level or high level, thereby distinguishing Whether the cable connector is plugged in.

Through the aforementioned USB interface 101, the portable electronic device can realize data communication and charging at the same time. When the electronic device uses the USB interface 101 for data communication with the computer, the computer provides a power source with a voltage of 5V and a current of 500mA to the portable device on the power supply terminal VBUS of the USB interface 101, and the USB data communication requires only a small current, so The remaining current can be used for charging. Since the voltage provided by the computer through the USB data terminal is 5V and the current is 500mA, the USB interface according to the present invention is more suitable for electronic equipment that works normally under a charging voltage of 5V and a current of 500mA.

The above USB interface may be a USB plug or a USB socket.

Since there is currently no charging interface for a charger that can be inserted into a USB interface, in order to directly charge the portable electronic device through the charger, the present invention also discloses a charging interface for a portable electronic device charger. The interface It is matched with the USB interface. As shown in FIG. 2, the charging interface 202 includes two ferrules, and the + end is a power supply ferrule,- The terminal is a ground terminal ferrule. The charging interface 202 is matched with the USB interface 101. Its physical shape is the same as the physical shape of the USB interface 101. It can be inserted into the USB interface 101. After inserting the USB interface 101, The power supply terminal VBUS contacts, and the ground terminal ferrule is in contact with the ground terminal GND of the USB interface 101. The charging interface 202 may also be a standard USB plug or a USB socket. Its data terminal is empty, its power supply terminal is connected to the power supply terminal of the charging device, and its ground terminal is connected to the ground terminal of the charging device.

Utilizing the above-mentioned charging interface 202, the USB interface 101 can be connected to the charger 202 to implement the charging of portable electronic devices, but the portable electronic devices require the voltage range of the charger 201 to be between 4.8V and 5.4V to ensure charging The unit works safely and reliably.

In order to realize the portable electronic device using a USB cable and a charger for USB data transmission and charging at the same time, the present invention also discloses two types of USB expansion heads. The structure of the first USB expansion head is shown in FIG. 3, and the expansion head 301 It includes an input USB interface 302, a charging interface 303, and an output USB interface 304. The input USB interface 302 is the same as the USB interface 101 on the portable electronic device, and its data terminals D- and D + are respectively the ferrules of the output USB interface 304. D-is connected to the ferrule D +, and its power supply terminal VBUS is connected to the ferrule VBUS of the output USB interface 304. The ground terminal GND is connected to the ferrule GND of the output USB interface 304; the charging interface 303 is a common charger The charging terminal has a + terminal as a power supply terminal and is connected to the ferrule VBUS of the output USB interface 304, and a-terminal of the charging socket is a ground terminal and is connected to the GND of the output USB interface 304; the output USB interface 304 is a common Insert the USB connector of the USB interface 101 of the electronic device. After the USB connector is inserted into the USB interface, the ferrule D-and the ferrule D + are respectively connected to the data terminal D-and the data terminal D + of the USB interface 101. Contact, the ferrule VBUS is in contact with the power supply terminal VBUS of the USB interface 101, and the ferrule GND is in contact with the ground terminal GND of the USB interface 101. The above-mentioned input USB interface 302 and output USB interface 304 are USB plugs or USB sockets.

Plug the USB cable into one of the USB ports in the USB expansion head, plug the charging port of a common charger into the charging port in the USB expansion head, and plug the USB The USB connector of the head is inserted into the USB interface of the portable electronic device, so that the electronic device can be transmitted at the same time. The USB data can be transmitted and charged.

The structure of the second expansion head is shown in FIG. 4. The expansion head 401 includes an input USB interface 402, an input USB interface 403, and an output USB interface 404. The input USB interface 402 and the input USB interface 403 are connected to the portable electronic device. The input USB interface 101 is the same, its data terminals D-and D + are respectively connected to the ferrule D-of the output USB interface 404 and the ferrule D +, its power supply terminal VBUS is connected to the ferrule VBUS of the output USB interface 404, and the ground terminal GND is connected to The ferrule GND of the output USB interface 404 is connected. The output USB interface 404 is a USB interface that can be inserted into the input USB interface 101 of an electronic device. The output USB interface is inserted into the input USB interface. After that, the ferrule D-and the ferrule D + are respectively It is in contact with the data terminal D- and the data terminal D + of the input USB interface 101, the ferrule VBUS is in contact with the power supply terminal VBUS of the input USB interface 101, and the ferrule GND is in contact with the ground terminal GND of the input USB interface 101. The input USB interface 402, input USB interface 403, and output USB interface 404 described above are USB sockets or USB plugs.

After the output USB interface of the USB expansion head is inserted into the USB interface of the portable electronic device, one of the input USB interfaces of the USB expansion head can realize data transmission by connecting a USB cable, and the other of the above USB expansion heads inputs USB The interface can be used to charge an electronic device by connecting the charging interface of the charger.

The above are only the preferred embodiments of the present invention, but the scope of protection of the present invention is not limited to this. In the case of using the USB interface for charging and integrating the USB interface with charging and power functions, and any familiarity Changes or replacements that can be easily conceived by those skilled in the art within the scope of the technology disclosed by the present invention should be covered by the protection scope of the present invention.

Claims

Claim

1. A portable electronic device comprising at least a USB interface, a USB transceiver and a charging unit, wherein the USB interface includes two data ends, a power supply end and a ground end, and the data end of the USB interface and the USB The data line connection of the transceiver device is characterized in that the power supply end of the USB interface is connected to the power supply line of the USB transceiver device and the power supply line of the charging unit.

2. The portable electronic device according to claim 1, further comprising a CPU, connected to the USB transceiver and the charging unit, and configured to connect the USB transceiver and the charging unit. The charging unit is controlled.

3. The portable electronic device according to claim 2, wherein the charging unit includes a charging circuit and a charging management module, and a power supply terminal of the charging circuit is connected to a power supply terminal of the USB interface, and The level status monitoring line of the charge management module is connected to the power supply end of the USB interface.

4. The portable electronic device according to claim 3, wherein the charging unit further comprises a level generating circuit connected in series between a power supply terminal and a ground terminal of the USB interface for an external cable connector. When the USB interface is inserted, a high level is generated at the power supply end of the USB interface. When the external cable connector is not inserted into the USB interface, a high level is generated at the power supply end of the USB interface.

5. The portable electronic device according to claim 3, wherein the charging circuit comprises at least one triode, a step-down resistor, a field effect transistor, and a rechargeable battery, wherein the emitter and collector of the triode A step-down resistor, a source and a drain of a field-effect transistor, and a rechargeable battery connected in series; the emitter of the transistor is connected to the power supply terminal of the charging circuit, and is connected to the power supply terminal of the USB interface; The connection of the CPU, the base of the transistor, the step-down resistor, the gate of the field effect transistor and the rechargeable battery are described. The control command performs charge management control on the triode, the P-bar resistor, the field effect tube, and the rechargeable battery.

6. The portable electronic device according to any one of claims 1 to 5, wherein the portable electronic device is a mobile phone, a handheld computer, and an MP3 player.

7. The portable electronic device according to claim 1, 3, 4 or 5, wherein the USB interface is a USB plug or a USB socket.

8. An expansion head of a portable electronic device, characterized in that the expansion head includes an input USB interface, a charging interface and an output USB interface, wherein the input USB interface includes two data terminals, a power supply terminal and a ground terminal. The charging interface includes at least one power supply terminal and one ground terminal, and the output USB interface includes two data terminal ferrules, one power supply terminal ferrule and one ground terminal ferrule; the data input terminal of the USB interface and the data output from the USB interface The terminal ferrule is correspondingly connected. The power supply end of the input USB interface is connected to the power supply end ferrule of the output USB interface. The ground terminal of the input USB interface is connected to the ground end ferrule of the output USB interface. The power supply end of the charging interface is connected to the output USB interface. The power supply terminal is connected with the ferrule, and the ground terminal of the charging interface is connected with the ground terminal of the output USB interface.

9. The expansion head according to claim 8, wherein the charging interface is a USB plug or a USB socket, and the data terminal of the USB plug or USB socket is correspondingly connected to the data terminal socket of the output USB. Interface. The power supply terminal of the USB plug or USB socket is connected to the power supply terminal ferrule of the output USB interface, and the ground terminal of the USB plug or USB socket is connected to the ground terminal ferrule of the output USB interface.

10. The expansion head according to claim 8 or 9, wherein the input USB interface is a USB plug or a USB socket, and the output USB interface is a USB plug or a USB socket.

11. A charging interface of a charging device for a portable electronic device, characterized in that the charging interface includes a power supply terminal ferrule and a ground terminal ferrule, and the power supply terminal ferrule is connected to the power supply of the charging device. The ground terminal of the device is connected, and the charging interface is matched with the USB interface. The physical shape of the sleeve is the same as the physical shape of the USB interface. When the charging interface and the USB interface are inserted into each other, the power supply terminal insert is in contact with the power supply terminal in the USB interface, and the ground terminal insert is in contact with the ground terminal in the USB interface. .

12. The charging interface according to claim 11, wherein the charging interface is a USB plug or a USB socket, a data terminal of the charging interface is vacant, a power supply terminal is connected to a power supply terminal of the charging device, and a ground terminal is connected to the charging device. The ground terminal is connected.