Wireless adapter and data transmission device

Abstract

The utility model discloses a wireless adapter and a data transmission device. The wireless adapter comprises an OTG chip circuit, a Bluetooth communication circuit, a first interface circuit and a second interface circuit. The OTG chip circuit comprises an OTG chip, and a first power interface, a second power interface and a third power interface which are respectively connected with the OTG chip; when the first interface circuit is connected with the charging interface of the data receiving terminal and the second interface circuit is triggered, the OTG chip outputs the voltage accessed by the second interface circuit to the first interface circuit and the Bluetooth communication circuit to charge the data receiving terminal and supply power to the Bluetooth communication circuit; when the first interface circuit is connected with the charging interface of the data receiving terminal and the second interface circuit is not triggered, the OTG chip collects voltage from the data receiving terminal through the first interface circuit and supplies power to the Bluetooth communication circuit. Therefore, the problem that equipment cannot be charged after an existing wireless adapter is inserted into the equipment is solved.

Description

Technical Field

[0001] The utility model relates to the field of electronic technology, in particular to a wireless adapter and a data transmission device. Background Art

[0002] With the progress of technology and the update of electronic products, the interfaces of devices such as mobile phones are becoming fewer and fewer. Some mobile phone devices only have a charging interface left (Type-c, micro usb, lightning). When a data terminal device communicates with a mobile phone, in order to reduce latency and power consumption, a wireless adapter is usually attached. This adapter can receive 2.4G private protocol signals and wireless signals such as LE Audio that the mobile phone itself does not support receiving. When in use, in order to transmit the wireless signal sent by the data terminal device to the mobile phone, the wireless adapter is directly connected to the mobile phone through the charging interface of the mobile phone. While directly powering the wireless adapter by the mobile phone, the data of the data terminal device is transmitted to the mobile phone through the wireless adapter. However, when the mobile phone charging interface is occupied, the mobile phone cannot be charged. Summary of the Utility Model

[0003] The main purpose of the utility model is to provide a wireless adapter and a data transmission device to solve the problem that the device cannot be charged after the existing wireless adapter is inserted into the device.

[0004] The utility model provides a wireless adapter in a first aspect. The wireless adapter includes: an OTG chip circuit, a Bluetooth communication circuit, a first interface circuit, and a second interface circuit;

[0005] The OTG chip circuit includes an OTG chip, and a first power interface, a second power interface, and a third power interface respectively connected to the OTG chip;

[0006] The first power interface is connected to the first interface circuit, the second power interface is connected to the second interface circuit, the third power interface is connected to the power supply end of the Bluetooth communication circuit, and the data end of the Bluetooth communication circuit is connected to the first interface circuit;

[0007] When the first interface circuit is connected to the charging interface of the data receiving terminal and the second interface circuit is triggered, the OTG chip outputs the voltage accessed by the second interface circuit to the first interface circuit and the Bluetooth communication circuit to charge the data receiving terminal and supply power to the Bluetooth communication circuit;

[0008] When the first interface circuit is connected to the charging interface of the data receiving terminal and the second interface circuit is not triggered, the OTG chip collects voltage from the data receiving terminal through the first interface circuit to supply power to the Bluetooth communication circuit.

[0009] Optionally, the first interface circuit includes a first trigger component connected to the OTG chip and a data charging integrated interface. The first trigger component is disposed on the data charging integrated interface. When the data charging integrated interface is plugged into the charging interface of the data receiving terminal, the first trigger component outputs a first trigger signal to the OTG chip.

[0010] Optionally, the first interface circuit further includes a charging circuit, which is connected in series between the data charging integrated interface and the first power interface, and is used to charge the data receiving end or supply power to the Bluetooth communication circuit.

[0011] Optionally, the charging circuit includes a first MOS transistor, a second MOS transistor, a first resistor, a second resistor, a third resistor, a fourth resistor, and a capacitor;

[0012] The base of the first MOS transistor is connected to the OTG chip, the collector of the first MOS transistor is connected to the data charging integrated interface, and the emitter of the first MOS transistor is connected to the emitter of the second MOS transistor;

[0013] The first resistor is disposed between the base of the first MOS transistor and the emitter of the second MOS transistor, the second resistor is disposed between the base of the first MOS transistor and the base of the second MOS transistor, and the capacitor is disposed between the base of the second MOS transistor and the emitter of the second MOS transistor;

[0014] After the third resistor and the fourth resistor are connected in series, they are disposed between the power ground and the collector of the second MOS transistor, and the collector of the second MOS transistor is connected to the second interface circuit.

[0015] Optionally, the second interface circuit includes a second trigger component connected to the OTG chip and a charging interface. The second trigger component is disposed on the charging interface. When the charging interface is plugged into a charger, the second trigger component outputs a second trigger signal to the OTG chip.

[0016] Optionally, both the data charging integrated interface and the charging interface are Type-c or USB.

[0017] Optionally, the Bluetooth communication circuit includes: a low-power Bluetooth chip, and a radio frequency front-end chip circuit and an auxiliary circuit connected to the low-power Bluetooth chip;

[0018] The data terminal of the low-power Bluetooth chip is connected to the first interface circuit, and the power terminal of the low-power Bluetooth chip is connected to the third power interface.

[0019] Optionally, the auxiliary circuit includes:

[0020] An indication circuit respectively connected to the low-power Bluetooth chip and the power ground, for indicating the working state of the wireless adapter;

[0021] A key circuit respectively connected to the low-power Bluetooth chip and the power ground, for controlling the connection state between the wireless adapter and the data sending end.

[0022] Optionally, the auxiliary circuit further includes:

[0023] A voltage stabilizing circuit connected to the low-power Bluetooth chip, for providing a stable working voltage.

[0024] A second aspect of the present invention provides a data transmission device, which is characterized by including a data receiving unit, a data sending unit, and a wireless adapter provided as above;

[0025] The data receiving unit is connected to the first interface circuit in the wireless adapter, and the data sending unit is wirelessly connected to the Bluetooth communication circuit in the wireless adapter.

[0026] The wireless adapter provided by the present invention includes an OTG chip circuit, a Bluetooth communication circuit, a first interface circuit, and a second interface circuit; the OTG chip circuit includes an OTG chip, and a first power interface, a second power interface, and a third power interface respectively connected to the OTG chip; the first power interface is connected to the first interface circuit, the second power interface is connected to the second interface circuit, the third power interface is connected to the power terminal of the Bluetooth communication circuit, and the data terminal of the Bluetooth communication circuit is connected to the first interface circuit; when the first interface circuit is connected to the charging interface of the data receiving terminal and the second interface circuit is triggered, the OTG chip outputs the voltage accessed by the second interface circuit to the first interface circuit and the Bluetooth communication circuit to charge the data receiving terminal and supply power to the Bluetooth communication circuit; when the first interface circuit is connected to the charging interface of the data receiving terminal and the second interface circuit is not triggered, the OTG chip collects the voltage from the data receiving terminal through the first interface circuit to supply power to the Bluetooth communication circuit. By setting the OTG chip and two interface circuits, the wireless adapter can realize both the charging function and the data transmission function, thus solving the problem that the device cannot be charged after the existing wireless adapter is inserted into the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a first structural schematic diagram of the wireless adapter provided by the present invention;

[0028] Figure 2 Schematic diagram of the OTG chip circuit provided by the present utility model;

[0029] Figure 3 Schematic diagram of the charging circuit provided by the present utility model;

[0030] Figure 4 Schematic diagram of the second embodiment of the wireless adapter provided by the present utility model;

[0031] Figure 5 Schematic diagram of the Bluetooth communication circuit provided by the present utility model;

[0032] Figure 6 Schematic diagram of the structure of the data transmission device provided by the present utility model. Detailed implementation manners

[0033] In view of the problems existing in the existing wireless adapter, a wireless adapter and a data transmission device are proposed. By adding an OTG circuit, when simultaneously accessing a data receiving device and a charger, the functions of charging and data transmission can be achieved simultaneously.

[0034] The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of the present utility model and the above-mentioned drawings are used to distinguish similar objects and do not necessarily need to be used to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments described herein can be implemented in an order different from that shown or described herein. In addition, the terms "comprising" or "having" and any variation thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily need to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0035] For ease of understanding, the wireless adapter provided by the present utility model will be described in detail below. As Figure 1 shown, the wireless adapter includes: an OTG chip circuit 110, a Bluetooth communication circuit 120, a first interface circuit 130, and a second interface circuit 140;

[0036] The OTG chip circuit 110 includes an OTG chip 111, and a first power interface 112, a second power interface 113, and a third power interface 114 respectively connected to the OTG chip 111;

[0037] The first power interface 112 is connected to the first interface circuit 130, the second power interface 113 is connected to the second interface circuit 140, the third power interface 114 is connected to the power supply terminal of the Bluetooth communication circuit 120, and the data terminal of the Bluetooth communication circuit 120 is connected to the first interface circuit 130;

[0038] When the first interface circuit 130 is connected to the charging interface of the data receiving terminal and the second interface circuit 140 is triggered, the OTG chip 111 outputs the voltage accessed by the second interface circuit 140 to the first interface circuit 130 and the Bluetooth communication circuit 120 to charge the data receiving terminal and supply power to the Bluetooth communication circuit 120;

[0039] When the first interface circuit 130 is connected to the charging interface of the data receiving terminal and the second interface circuit 140 is not triggered, the OTG chip 111 collects voltage from the data receiving terminal through the first interface circuit 130 to supply power to the Bluetooth communication circuit 120.

[0040] It should be noted that the OTG chip 111 detects whether there is an access device in the first interface circuit 130 and the second interface circuit 140 through the setting method of the position circuit, that is, it detects whether the first interface circuit 130 is connected to the data receiving end (mobile phone), and whether the second interface circuit 140 is connected to the charger. When the position circuit is accessed by the mobile phone or the charger, it will be triggered and its own potential will change, so as to realize the detection of charging and / or data transmission. The OTG chip circuit 110 is also provided with multiple resistors and capacitors, and the series and parallel connection of resistors and capacitors is used to realize functions such as voltage stabilization and filtering, as Figure 2 shown.

[0041] In this embodiment, the first interface circuit 130 and the second interface circuit 140 can be understood as conventional interfaces, such as Type-c, USB, etc. The positive and negative poles in these interfaces are connected to the corresponding power interfaces. Specifically, the positive and negative poles in the first interface circuit 130 are connected to the first power interface 112, the data interface of the first interface circuit 130 is connected to the data terminal of the Bluetooth communication circuit 120, and the positive and negative poles of the second interface circuit 130 are connected to the second power interface 113.

[0042] After the OTG chip 111 determines that the first interface circuit 130 is triggered, it switches to be connected to the third power interface 114, so as to realize supplying power to the Bluetooth communication circuit 120 with the power on the mobile phone to realize subsequent data transmission.

[0043] In this embodiment, for the OTG chip 111 to detect whether the first interface circuit 130 and the second interface circuit 140 are triggered, it can be achieved by setting trigger components, without the need for program detection. Specifically, a trigger component is respectively set in the first interface circuit 130 and the second interface circuit 140.

[0044] That is, the first interface circuit 130 includes a first trigger component connected to the OTG chip 111 and a data charging integrated interface. The first trigger component is disposed on the data charging integrated interface. When the data charging integrated interface is plugged into the charging interface of the data receiving terminal, the first trigger component outputs a first trigger signal to the OTG chip 111.

[0045] In this embodiment, since the first interface circuit 130 needs to simultaneously implement charging, power supply, and data transmission, the first interface circuit 130 further includes a charging circuit, which is connected in series between the data charging integrated interface and the first power interface 112, and is used to charge the data receiving end or supply power to the Bluetooth communication circuit 120. When the second interface circuit 140 is not plugged into the charger, this charging circuit obtains electrical energy from the mobile phone and supplies it to the Bluetooth communication circuit 120, so that the Bluetooth communication circuit 120 can send and receive data.

[0046] Such as Figure 3 shown, this charging circuit is designed and implemented by two power devices. Specifically, the charging circuit includes a first MOS transistor, a second MOS transistor, a first resistor, a second resistor, a third resistor, a fourth resistor, and a capacitor;

[0047] The base of the first MOS transistor is connected to the OTG chip 111, the collector of the first MOS transistor is connected to the data charging integrated interface, and the emitter of the first MOS transistor is connected to the emitter of the second MOS transistor;

[0048] The first resistor is disposed between the base of the first MOS transistor and the emitter of the second MOS transistor, the second resistor is disposed between the base of the first MOS transistor and the base of the second MOS transistor, and the capacitor is disposed between the base of the second MOS transistor and the emitter of the second MOS transistor;

[0049] After the third resistor and the fourth resistor are connected in series, they are disposed between the power ground and the collector of the second MOS transistor, and the collector of the second MOS transistor is connected to the second interface circuit 140.

[0050] In another embodiment, the second interface circuit 140 includes a second trigger component and a charging interface connected to the OTG chip 111. The second trigger component is disposed on the charging interface. When the charging interface is connected to a charger, the second trigger component outputs a second trigger signal to the OTG chip 111. Optionally, both the data charging integrated interface and the charging interface are Type-c or USB. It can even be a micro usb or a lightning interface.

[0051] As Figure 4 and 5 shown, the Bluetooth communication circuit 120 includes: a low-power Bluetooth chip 121, and a radio frequency front-end chip circuit 122 and an auxiliary circuit 123 connected to the low-power Bluetooth chip 121;

[0052] The data terminal of the low-power Bluetooth chip 121 is connected to the first interface circuit 130, and the power terminal of the low-power Bluetooth chip 121 is connected to the third power interface 114.

[0053] Furthermore, the auxiliary circuit 123 includes:

[0054] An indication circuit respectively connected to the low-power Bluetooth chip 121 and the power ground, for indicating the working state of the wireless adapter;

[0055] A key circuit respectively connected to the low-power Bluetooth chip 121 and the power ground, for controlling the connection state between the wireless adapter and the data sending end.

[0056] Furthermore, the auxiliary circuit further includes:

[0057] A voltage stabilizing circuit connected to the low-power Bluetooth chip 121, for providing a stable working voltage.

[0058] In practical applications, most wireless adapters are made in the form of Dongles. They receive wireless data sent by a data sending terminal (such as a mobile phone) through a 2.4G private protocol / LEAudio, etc., and then transmit the data to a book receiving terminal (such as a mobile phone), thus enabling Bluetooth communication between two devices and transmitting the main sentence.

[0059] In order to charge the data receiving terminal while transmitting data, the OTG chip 111 is used to implement the function of the wireless adapter transmitting data while charging.

[0060] Figure 4 For the wireless adapter in , through the OTG chip 111, the data transmission between the data receiving terminal and the wireless adapter can be managed, and at the same time, the data receiving terminal can be charged without affecting data transmission.

[0061] Optionally, the first interface circuit 130 and the second interface circuit 140 adopt a Type-c interface design. If there is a terminal with other interfaces, an adapter can be used for conversion and then a wireless adapter can be used. The Type-c interface on the left in the figure can be connected to a charger, and the Type-c interface on the top can be connected to a data receiving terminal. The OTG chip 111 is connected to the Type-c (connected to the charger) through the power line 2, connected to the Type-c (connected to the data receiving terminal) through the power line 1, and connected to the power line of the low-power Bluetooth SOC through the power line 4. The data lines of the data receiving terminal and the wireless adapter are connected through the line 3. At the same time, the wireless adapter can also be added with lights and buttons to indicate the status.

[0062] Specific working conditions: 1. The wireless adapter is connected to the data receiving terminal and not connected to the charger. At this time, the OTG chip 111 detects that the power line 1 of the Type-c connected to the data receiving terminal is powered, and at the same time, the power line 2 of the Type-c connected to the charger is not powered. At this time, the OTG chip 111 will control the use of the power of the data receiving terminal to supply power to the low-power Bluetooth SOC. In this way, the powered wireless adapter can perform data transmission with the data receiving terminal.

[0063] 2. The wireless adapter is connected to the data receiving terminal and connected to the charger at the same time. At this time, the OTG chip 111 detects that the power line 1 of the Type-c connected to the data receiving terminal is powered, and at the same time, it detects that the power line 2 of the Type-c connected to the charger is powered. At this time, the OTG chip 111 will control the use of the power of the charger to charge the data receiving terminal through the power line 1, and at the same time, it will directly supply power to the low-power Bluetooth SOC through the line 4. At this time, the powered wireless adapter can communicate with the mobile phone normally, and the mobile phone can also be charged normally. Different OTG chips 111 can also support different charging rates, and can be compatible according to the type of data receiving terminal, so that the charging rate is more matched with the data receiving terminal model.

[0064] By adding the OTG chip 111, it can be intelligently detected whether the wireless adapter is directly connected to the data receiving terminal or connected to the data receiving terminal and the charger at the same time. By controlling the role of the mobile phone through the OTG chip 111, the data receiving terminal can be switched between taking power from and supplying power to the wireless adapter, so that the wireless adapter meets the needs of different usage scenarios, improves the user experience, and prolongs the usage time of the data receiving terminal and the wireless adapter. It meets the need to charge the data receiving terminal while using the wireless adapter.

[0065] Such as Figure 6As shown in the figure, the present utility model further provides a data transmission device, which includes a data receiving unit 610, a data sending unit 620, and a wireless adapter 630 provided as in the above embodiment;

[0066] The data receiving unit 610 is connected to a first interface circuit in the wireless adapter, and the data sending unit 620 is wirelessly connected to a Bluetooth communication circuit in the wireless adapter.

[0067] As mentioned above, the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A wireless adapter, characterized in that: The wireless adapter comprises: an OTG chip circuit, a Bluetooth communication circuit, a first interface circuit and a second interface circuit; The OTG chip circuit includes an OTG chip, and a first power interface, a second power interface and a third power interface respectively connected to the OTG chip; The first power interface is connected to the first interface circuit, the second power interface is connected to the second interface circuit, the third power interface is connected to the power end of the Bluetooth communication circuit, and the data end of the Bluetooth communication circuit is connected to the first interface circuit; When the first interface circuit is connected to the charging interface of the data receiving terminal and the second interface circuit is triggered, the OTG chip outputs the voltage connected to the second interface circuit to the first interface circuit and the Bluetooth communication circuit to charge the data receiving terminal and supply power to the Bluetooth communication circuit; When the first interface circuit is connected to the charging interface of the data receiving terminal and the second interface circuit is not triggered, the OTG chip collects voltage from the data receiving terminal through the first interface circuit to power the Bluetooth communication circuit.

2. The wireless adapter according to claim 1, wherein: The first interface circuit includes a first trigger component and a data charging integrated interface connected to the OTG chip. The first trigger component is arranged on the data charging integrated interface. When the data charging integrated interface is connected to the charging interface of the data receiving terminal, the first trigger component outputs a first trigger signal to the OTG chip.

3. The wireless adapter according to claim 2, wherein: The first interface circuit also includes a charging circuit, which is connected in series between the data charging integrated interface and the first power interface and is used to charge the data receiving end or to supply power to the Bluetooth communication circuit.

4. The wireless adapter according to claim 3, characterized in that: The charging circuit includes a first MOS tube, a second MOS tube, a first resistor, a second resistor, a third resistor, a fourth resistor and a capacitor; The base of the first MOS tube is connected to the OTG chip, the collector of the first MOS tube is connected to the data charging integrated interface, and the emitter of the first MOS tube is connected to the emitter of the second MOS tube; The first resistor is arranged between the base of the first MOS tube and the emitter of the second MOS tube, the second resistor is arranged between the base of the first MOS tube and the base of the second MOS tube, and the capacitor is arranged between the base of the second MOS tube and the emitter of the second MOS tube; The third resistor and the fourth resistor are connected in series and are arranged between the power ground and the collector of the second MOS tube, and the collector of the second MOS tube is connected to the second interface circuit.

5. The wireless adapter according to claim 2, wherein: The second interface circuit includes a second trigger component and a charging interface connected to the OTG chip, the second trigger component is arranged on the charging interface, and when the charging interface is connected to a charger, the second trigger component outputs a second trigger signal to the OTG chip.

6. The wireless adapter according to claim 5, characterized in that: The data charging integrated interface and the charging interface are both Type-c or USB.

7. The wireless adapter according to any one of claims 1 to 5, characterized in that: The Bluetooth communication circuit includes: a low-power Bluetooth chip, and a radio frequency front-end chip circuit and an auxiliary circuit connected to the low-power Bluetooth chip; The data end of the low-power Bluetooth chip is connected to the first interface circuit, and the power end of the low-power Bluetooth chip is connected to the third power interface.

8. The wireless adapter according to claim 7, wherein: The auxiliary circuit comprises: An indication circuit connected to the low-power Bluetooth chip and the power ground respectively, and used to indicate the working state of the wireless adapter; The key circuits connected to the low-power Bluetooth chip and the power ground are respectively used to control the connection state between the wireless adapter and the data transmitting end.

9. The wireless adapter according to claim 8, characterized in that: The auxiliary circuit further comprises: The voltage stabilizing circuit connected to the low-power Bluetooth chip is used to provide a stable operating voltage.

10. A data transmission device, characterized in that: comprising a data receiving unit, a data sending unit and a wireless adapter as claimed in any one of claims 1 to 9; The data receiving unit is connected to the first interface circuit in the wireless adapter, and the data sending unit is wirelessly connected to the Bluetooth communication circuit in the wireless adapter.

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