Universal Serial Bus Adapters and Systems

Abstract

The present application relates to a universal serial bus adapter and system. The universal serial bus adapter is provided with an audio and video signal processing circuit, a power processing circuit and a control circuit. The control circuit controls the working state of the power processing circuit according to the audio and video signals and the power signal in the external device. The audio and video signals and the power signal are respectively connected to the second interface through the audio and video signal processing circuit and the power processing circuit, thereby separating the audio and video signals and the power signal in the external device for processing. Even when the timing of inserting the audio and video device and the power device in the external device into the first interface changes, the control circuit can process the audio and video signals and the power signal through two different paths of the audio and video signal processing circuit and the power processing circuit, respectively, thereby solving the technical problem of poor compatibility of the current universal serial bus existing in the prior art and greatly improving the compatibility of the universal serial bus.

Description

Technical Field

[0001] The present application relates to the technical field of signal connectors, and in particular to a universal serial bus adapter and system. Background Art

[0002] In order to charge or improve the use effect of general mobile phones, tablet computers, notebooks and other electronic devices, some external devices such as chargers, audio devices or video devices are generally used for charging, playing video and audio, etc. At present, with the continuous improvement of electronic equipment industry specifications, electronic devices are generally provided with Type-C interfaces, and electronic devices and external devices are connected through a universal serial bus (USB data cable). When the universal serial bus has multiple connection ports, different connection ports are connected to different external devices, such as chargers, audio devices or video devices, but the timing of different signals entering the universal serial bus is different, which can easily cause the internal controller of the universal serial bus to process different signals with delays or misjudgments, resulting in electronic devices or external devices not producing sound, video or being unable to charge. Therefore, the current universal serial bus has poor compatibility. Summary of the invention

[0003] Based on this, it is necessary to provide a universal serial bus adapter and system to address the problem of poor compatibility of the current universal serial bus.

[0004] A universal serial bus adapter, comprising:

[0005] A first interface, used to connect an external device, the external device includes an audio and video device and a power supply device;

[0006] The second interface is used to connect to the main device;

[0007] an audio and video signal processing circuit, wherein a first end of the audio and video signal processing circuit is connected to the first interface signal, a second end of the audio and video signal processing circuit is connected to the second interface signal, and the audio and video signal processing circuit is used to convert the audio and video signal input through the first interface and the high-speed signal input through the second interface into each other, and output them through the second interface and the first interface respectively;

[0008] a power processing circuit, wherein a first end of the power processing circuit is electrically connected to the first interface, a second end of the power processing circuit is electrically connected to the second interface, and a third end of the power processing circuit is electrically connected to a power supply end of the audio and video signal processing circuit;

[0009] The control circuit is respectively connected to the first interface and the control end of the power processing circuit by signal, and the control circuit is used to control the operation of the power processing circuit.

[0010] In one embodiment, the control circuit is used to

[0011] In the case that there is only a power supply device in the external device, controlling the power supply processing circuit to connect the electrical connection between the first interface and the second interface, and disconnecting the electrical connection between the power supply processing circuit and the audio and video signal processing circuit;

[0012] When there is only an audio or video device among the external devices, controlling the power processing circuit to connect the second interface with the power processing circuit;

[0013] In the case that the external device includes both an audio and video device and a power device, the power processing circuit is controlled to connect the first interface, the second interface and the power processing circuit.

[0014] In one embodiment, the power processing circuit includes:

[0015] a first power switch, wherein a first end of the first power switch is electrically connected to the first interface, and a second end of the first power switch is electrically connected to the second interface;

[0016] A second power switch, wherein a first end of the second power switch is electrically connected to a third end of the first power switch, and a second end of the second power switch is electrically connected to a power end of the audio and video signal processing circuit.

[0017] In one embodiment, the power processing circuit further includes:

[0018] A voltage regulator, wherein the input end of the voltage regulator is electrically connected to the third end of the first power switch, the output end of the voltage regulator is electrically connected to the power end of the audio and video signal processing circuit and the control circuit respectively, and the voltage regulator is used to convert the voltage output by the first power switch into a preset voltage.

[0019] In one embodiment, the audio and video signal processing circuit includes:

[0020] A protocol processor, a first end of which is signal-connected to the external device;

[0021] A signal converter, wherein the first end of the signal converter is signal-connected to the second end of the protocol processor, the second end of the signal converter is signal-connected to the second interface, and the signal converter is used to convert the audio and video signals in the external device into high-speed signals.

[0022] In one embodiment, the audio and video signal processing circuit further includes:

[0023] A signal switch, wherein the first end of the signal switch is signal-connected to the second end of the signal converter, the second end of the signal switch is signal-connected to the second interface, the control end of the signal switch is signal-connected to the control circuit, and the signal switch is used to switch the transmission direction of the high-speed signal.

[0024] In one embodiment, it also includes:

[0025] A controller, connected to the control terminal of the protocol processor by signal, and used to control the operation of the protocol processor;

[0026] The controller is also connected to the signal converter signal, and the controller is further used to wake up the signal converter when the signal converter signal is dormant.

[0027] In one embodiment, it also includes:

[0028] The memory is connected to the controller signal.

[0029] In one embodiment, the first interface includes:

[0030] An audio interface, signal-connected to a first end of the audio and video signal processing circuit;

[0031] A video interface, signal-connected to a first end of the audio and video signal processing circuit;

[0032] A power interface is electrically connected to the first end of the power processing circuit.

[0033] A universal serial bus adapter system, comprising:

[0034] a Universal Serial Bus adapter as described above;

[0035] an external device connected to the first interface signal;

[0036] A master device is connected to the second interface signal.

[0037] An embodiment of the present application provides a universal serial bus adapter, which is provided with the audio and video signal processing circuit, the power processing circuit and the control circuit. The control circuit controls the working state of the power processing circuit according to the audio and video signal and the power signal in the external device, and the audio and video signal and the power signal are respectively connected to the second interface through the audio and video signal processing circuit and the power processing circuit, so that the audio and video signal and the power signal in the external device are separated for processing. Even when the timing of inserting the audio and video device and the power device in the external device into the first interface changes, the control circuit can process the audio and video signal and the power signal through two different paths of the audio and video signal processing circuit and the power processing circuit, respectively, thereby solving the technical problem of poor compatibility of the current universal serial bus in the prior art and greatly improving the compatibility of the universal serial bus.

[0038] At the same time, the universal serial bus adapter provided in the embodiment of the present application supplies power to the control circuit and the audio and video signal processing circuit through the power processing circuit to ensure the normal and stable operation of the control circuit and the audio and video signal processing circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0040] Figure 1 A structural diagram of a universal serial bus adapter provided by one embodiment of the present application;

[0041] Figure 2 A structural diagram of a universal serial bus adapter provided by one embodiment of the present application;

[0042] Figure 3 A structural diagram of a universal serial bus adapter provided by one embodiment of the present application;

[0043] Figure 4 A structural diagram of a universal serial bus adapter provided by one embodiment of the present application;

[0044] Figure 5 A structural diagram of a universal serial bus adapter system provided in one embodiment of the present application.

[0045] Description of reference numerals:

[0046] 10. Universal serial bus adapter; 100. First interface; 110. Audio interface; 120. Video interface; 130. Power interface; 200. Second interface; 300. Audio and video signal processing circuit; 310. Protocol processor; 320. Signal converter; 330. Signal switch; 400. Power processing circuit; 410. First power switch; 420. Second power switch; 430. Voltage regulator; 500. Control circuit; 600. Controller; 700. Memory; 20. Universal serial bus adapter system; 21. External device; 22. Main device. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the following is a further detailed description of a universal serial bus adapter and system of the present application through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0048] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of this application, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to this application.

[0049] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0050] The embodiment of the present application provides a universal serial bus adapter, which is also called a USB adapter, and can be used for signal transmission between any host device and an external device. The host device can be a computer, a server, a tablet, a mobile phone, a single-chip microcomputer, etc., and the external device can be an audio and video device, a power supply device, etc. The following embodiments are specifically described by taking the application of the universal serial bus adapter between the host device and the external device for signal transmission as an example.

[0051] See also Figure 1 An embodiment of the present application provides a universal serial bus adapter 10, including: a first interface 100, a second interface 200, an audio and video signal processing circuit 300, a power processing circuit 400 and a control circuit 500.

[0052] The first interface 100 is used to connect the external device 21, and is connected to the external device 21 by signal when in use. The external device 21 includes an audio and video device and a power supply device. The first interface 100 includes an audio and video input and output interface and a power supply interface. For example, when the audio and video signal in the external device 21 flows to the main device 22 through the first interface 100, the first interface 100 is an audio and video input interface; when the audio and video signal flows from the main device 22 to the external device 21, the first interface 100 is an audio and video output interface. The audio and video device can be a headset, a microphone, a projector, a television, a display, etc., and can generate or play an audio signal or a video signal, or an audio signal and a video signal when working. The power supply device can be a battery, a charger or other device with a charging function. The power supply device can generate a power signal when working to power other electronic devices or circuits in the universal serial bus adapter 10. The first interface 100 may include a video interface, an audio interface or an audio and video interface. The video interface may be a DP, HDMI, VGA, DVI, AV, RF, DisplayPort or other interfaces. The audio interface may be a PS / 2 interface, USB or other interfaces. This embodiment does not impose any limitation on the specific type and quantity of the first interface 100, and it can be selected according to actual conditions, as long as the access function of audio and video signals and power signals can be realized.

[0053] The second interface 200 is used to connect to the main device 22, and is connected to the main device 22 signal when in use. The main device 22 can be a computer, server, tablet, mobile phone, single-chip microcomputer, etc. When an audio and video signal flows to the main device 22, the main device 22 converts the audio and video signal into a video image or sound and plays it visually. When the external device 21 includes a speaker, a headset, etc., the high-speed signal generated in the main device 22 is transmitted to the speaker or headset after processing, and then played to the user. The second interface 200 can be a VGA display interface, a USB interface, etc., which is not specifically limited in this embodiment and can be specifically selected according to actual conditions.

[0054] The first end of the audio and video signal processing circuit 300 is connected to the first interface 100 by signal, and the second end of the audio and video signal processing circuit 300 is connected to the second interface 200 by signal. The audio and video signal processing circuit 300 is used to convert the audio and video signal input through the first interface 100 and the high-speed signal input through the second interface 200, and output them through the second interface 200 and the first interface 100 respectively. In other words, the audio and video signal processing circuit 300 is used to perform signal conversion, convert the audio and video signal input through the first interface 100 into a high-speed signal, and output it to the main device 22 through the second interface 200, or convert the high-speed signal input through the second interface 200 into an audio and video signal, and output it to the external device 21 through the first interface 100. The audio and video processing circuit can be any circuit that can realize the mutual conversion between audio and video signals and high-speed signals, and this embodiment does not specifically limit it.

[0055] The first end of the power processing circuit 400 is electrically connected to the first interface 100, the second end of the power processing circuit 400 is electrically connected to the second interface 200, and the third end of the power processing circuit 400 is electrically connected to the power supply end of the audio and video signal processing circuit 300. The power processing circuit 400 is used to supply power to the audio and video signal processing circuit 300 and the control circuit 500 to ensure the normal operation of the audio and video signal processing circuit 300 and the control circuit 500. The power supply of the power processing circuit 400 is selected, for example, by controlling the power supply device in the external device 21 to supply power to the audio and video signal processing circuit 300 and the control circuit 500, or controlling the main device 22 to supply power to the audio and video signal processing circuit 300 and the control circuit 500. At the same time, the power processing circuit 400 can also process the electrical energy from the main device 22 or the external device 21 to supply the audio and video signal processing circuit 300 and the control circuit 500 for use, while providing the audio and video signal processing circuit 300 and the control circuit 500 with the optimal operating voltage and operating current to ensure the operating stability of the audio and video signal processing circuit 300 and the control circuit 500.

[0056] The control circuit 500 is respectively connected to the first interface 100 and the control end of the power processing circuit 400 by signal, and the control circuit 500 is used to control the operation of the power processing circuit 400, such as controlling whether the power processing circuit 400 is working or not, and controlling the power supply source and power transmission path of the power processing circuit 400. The control circuit 500 may include a microcontroller or a control chip, etc., which is not limited in this embodiment and can be selected according to actual conditions.

[0057] The working principle of the universal serial bus adapter 10 provided in the embodiment of the present application is as follows:

[0058] The universal serial bus adapter 10 provided in the embodiment of the present application includes an audio and video signal processing circuit 300, a power supply processing circuit 400 and a control circuit 500. When an audio and video device is connected to the external device 21, the audio and video signal generated by the audio and video device is input to the audio and video signal processing circuit 300 through the first interface 100, and the audio and video signal processing circuit 300 converts and processes the audio and video signal to form a high-speed signal, and the high-speed signal is input to the main device 22 through the second interface 200 for playback. At the same time, when the external device 21 includes a non-power device, the control circuit 500 controls the power supply processing circuit 400 to sequentially input the power in the main device 22 to the audio and video signal processing circuit 300 and the control circuit 500 through the second interface 200, so as to supply power to the audio and video signal processing circuit 300 and the control circuit 500. When the external device 21 does not include a power supply device, and thus has no power supply signal, the power supply signal is input to the power supply processing circuit 400 through the first interface 100, and the power supply processing circuit 400 guides the power supply signal to the main device 22, the audio and video signal processing circuit 300, and the control circuit 500, and simultaneously supplies power to the main device 22, the audio and video signal processing circuit 300, and the control circuit 500. The power supply signal and the audio and video signal enter the second interface 200 through different processing paths, and are input to the main device 22 through the second interface 200 for playback.

[0059] An embodiment of the present application provides a universal serial bus adapter 10, which is provided with the audio and video signal processing circuit 300, the power processing circuit 400 and the control circuit 500. The control circuit 500 controls the working state of the power processing circuit 400 according to the audio and video signal and the power signal in the external device 21, and the audio and video signal and the power signal are respectively connected to the second interface 200 through the audio and video signal processing circuit 300 and the power processing circuit 400, so that the audio and video signal and the power signal in the external device 21 are separated for processing. Even when the timing of inserting the audio and video device and the power device in the external device 21 into the first interface changes, the control circuit can process the audio and video signal and the power signal through two different paths of the audio and video signal processing circuit 300 and the power processing circuit 400, respectively, thereby solving the technical problem of poor compatibility of the current universal serial bus existing in the prior art and greatly improving the compatibility of the universal serial bus.

[0060] At the same time, the universal serial bus adapter 10 provided in the embodiment of the present application supplies power to the control circuit 500 and the audio and video signal processing circuit 300 through the power processing circuit 400 to ensure the normal and stable operation of the control circuit 500 and the audio and video signal processing circuit 300.

[0061] In one embodiment, the control circuit 500 is further configured to perform the following functions:

[0062] When there is only a power supply device in the external device 21, the power supply processing circuit 400 is controlled to connect the electrical connection between the first interface 100 and the second interface 200, and to cut off the electrical connection between the power supply processing circuit 400 and the audio and video signal processing circuit 300, and power is supplied to the main device 22 and the control circuit 500 through the power supply device.

[0063] When there is only an audio and video device in the external device 21, the power processing circuit 400 is controlled to connect the electrical connection between the second interface 200 and the power processing circuit 400, and power is supplied to the audio and video signal processing circuit 300 and the control circuit 500 through the second interface 200 by the main device 22, thereby ensuring that the audio and video signal processing circuit 300 and the control circuit 500 can operate normally.

[0064] In the case that the external device 21 includes both an audio and video device and a power supply device, the power supply processing circuit 400 is controlled to connect the electrical connection between the first interface 100, the second interface 200 and the power supply processing circuit 400. The main device 22, the audio and video signal processing circuit 300 and the control circuit 500 are powered by the power supply device to ensure the normal operation of the audio and video signal processing circuit 300 and the control circuit 500.

[0065] See also Figure 2 In one embodiment, the power processing circuit 400 includes: a first power switch 410 , a second power switch 420 and a voltage regulator 430 .

[0066] The first end of the first power switch 410 is electrically connected to the first interface 100, the second end of the first power switch 410 is electrically connected to the second interface 200, and the third end of the first power switch 410 is electrically connected to the first end of the second power switch 420. The first power switch 410 is used to switch the power supply for the audio and video signal processing circuit 300 and the control circuit 500. For example, in this embodiment, two power supplies are included: the external device 21 and the main device 22. When the external device 21 is connected, the first power switch 410 switches the connection mode as follows: connect the electrical connection between the three ends of the external device 21, the main device 22 and the audio and video signal processing circuit 300, and supply power to the main device 22, the control circuit 500 and the audio and video signal processing circuit 300 through the external device 21, so as to ensure the normal operation of the audio and video signal processing circuit 300 and the control circuit 500. The first power switch 410 may be a three-way electronic switch, which includes three connection ports. The control end of the three-way electronic switch is connected to the control circuit 500 by signal, and the control circuit 500 controls the on and off of the three-way electronic switch, thereby realizing the electrical connection between the three terminals of the external device 21, the main device 22, and the audio and video signal processing circuit 300. This embodiment does not impose any restrictions on the specific type, model, etc. of the first power switch 410, which can be specifically selected or set according to actual conditions, as long as it can realize the electrical connection relationship between the three terminals of the first interface 100, the main device 22, and the audio and video signal processing circuit 300.

[0067] The first end of the second power switch 420 is electrically connected to the third end of the first power switch 410, and the second end of the second power switch 420 is electrically connected to the power end of the audio and video signal processing circuit 300. The second power switch 420 is used to control the on-off between the first power switch 410 and the audio and video signal processing circuit 300. When there is only a power device in the external device 21, and no audio and video device is connected, the control circuit 500 controls the second power switch 420 to turn off, thereby cutting off the power supply to the audio and video signal processing circuit 300. The second power switch 420 can be a double-open electronic switch, one end of which is electrically connected to the audio and video signal processing circuit 300, and the other end is electrically connected to the third end of the first power switch 410. In this embodiment, there is no limitation on the specific type and model of the second power switch 420, which can be selected according to actual conditions, and only needs to meet the function of controlling the electrical connection between the audio and video signal processing circuit 300 and the first power switch 410.

[0068] The input end of the voltage regulator 430 is electrically connected to the third end of the first power switch 410, and the output end of the voltage regulator 430 is electrically connected to the power end of the audio and video signal processing circuit 300 and the control circuit 500 respectively. The voltage regulator 430 is used to convert the voltage output by the first power switch 410 into a preset voltage, and provide the audio and video signal processing circuit 300 and the control circuit 500 with the best working current and working voltage to ensure the best working performance of the audio and video signal processing circuit 300 and the control circuit 500. The voltage regulator 430 can be a DC-DC converter or other electronic devices with a voltage regulation function, which is not specifically limited in this embodiment and can be specifically selected according to actual conditions.

[0069] See also Figure 3 In one embodiment, the audio and video signal processing circuit 300 includes: a protocol processor 310, a signal converter 320 and a signal switch 330.

[0070] The first end of the protocol processor 310 is connected to the external device 21 by signal. The protocol processor 310 is used to perform protocol processing on the audio and video signals input through the first interface 100, and form a pulse code modulation signal, that is, to perform mutual conversion between analog signals and digital signals, and transmit the analog signal to the first interface, and transmit the digital signal to the signal converter 320, so as to facilitate the subsequent signal converter 320 and the main device 22, and the external device 21 to identify and receive the audio and video signals. For example, the protocol processor 310 can perform protocol processing on the DAC-OUT PCM signal and the ADC-IN PCM signal, and perform audio pulse code modulation to form a digital signal. The protocol processor 310 can process PD protocol, QC protocol, BC1.2 and other protocols. This embodiment does not impose any restrictions on the encoding processing type of the protocol processor 310, which can be specifically selected or set according to actual conditions, and this embodiment does not impose any specific restrictions.

[0071] The first end of the signal converter 320 is signal-connected to the second end of the protocol processor 310, and the second end of the signal converter 320 is signal-connected to the second interface 200. The signal converter 320 is used to convert the audio and video signals in the external device 21 into high-speed signals to facilitate the analysis and processing by the main device 22. Or convert the high-speed signals in the main device 22 into audio and video signals to facilitate the reception and processing by the external device 21. The signal converter 320 starts the relevant protocol to work only after receiving the second detection signal and reporting to the main device 22 through the second interface 200, so as to achieve the working stability of the universal serial bus adapter 10 described in this embodiment. The signal converter 320 can be any electronic device with the function of converting audio and video signals and high-speed signals. This embodiment does not make specific restrictions and can be specifically selected according to actual conditions.

[0072] The first end of the signal switch 330 is connected to the second end of the signal converter 320 by signal, the second end of the signal switch 330 is connected to the second interface 200 by signal, and the control end of the signal switch 330 is connected to the control circuit 500 by signal. The signal switch 330 is directly controlled by the control circuit 500 to work, and the signal processing efficiency is higher. The signal switch 330 is used to switch the transmission direction of the high-speed signal, for example, the high-speed signal output from the main device 22 is input to the signal converter 320 through the signal switch 330 for further processing into the audio and video signal, or the high-speed signal output from the signal converter 320 is output to the second interface 200 through the signal switch 330, and is input to the main device 22 through the second interface 200. This embodiment does not impose any restrictions on the specific type, model, etc. of the signal switch 330, which can be specifically selected or set according to actual conditions, and is limited to the function of switching the transmission direction of the high-speed signal.

[0073] In one embodiment, the universal serial bus adapter 10 further includes: a controller 600 and a memory 700 .

[0074] The memory 700 is connected to the controller 600 by signal. The memory 700 is used to store information from the main device 22 or customized information and pre-set information such as program code. The memory 700 can also be used to store other information, such as the operating state or fault state of the control circuit 500 during operation. The memory 700 can be a memory chip, etc., which is not specifically limited in this embodiment and can be specifically selected or set according to actual conditions, as long as the storage function can be achieved.

[0075] The controller 600 is connected to the control end of the protocol processor 310 by signal, and the controller 600 is used to control the operation of the protocol processor 310. The controller 600 may be a MUC controller, through which the customized information stored in the memory 700 is processed and input into the protocol processor 310, and after further processing, it is played through the main device 22 or the external device 21. At the same time, the controller 600 is also connected to the signal converter 320 by signal, and the controller 600 is also used to wake up the signal converter 320 when the signal converter 320 is dormant. The controller 600 may also be a chip or other electronic device with other specific control functions, which is not specifically limited in this embodiment.

[0076] See also Figure 4 In one embodiment, the first interface 100 includes: an audio interface 110 , a video interface 120 and a power interface 130 .

[0077] The audio interface 110 is signal-connected to the first end of the audio and video signal processing circuit 300, and the audio interface 110 is used to connect audio devices, such as earphones, speakers, etc. The audio interface 110 can be a PS / 2 interface, a USB interface, etc.

[0078] The video interface 120 is signal-connected to the first end of the audio and video signal processing circuit 300 for connecting devices. The video interface 120 may be DP, HDMI, VGA, DVI, AV, RF, DisplayPort, USB or other interfaces. This embodiment does not impose any limitation on the number, model, etc. of the video interface 120, which may be selected or set according to actual conditions, as long as the function of connecting the video device can be realized.

[0079] The power interface 130 is electrically connected to the first end of the power processing circuit 400. The power interface 130 is used to connect an external power source or a charger, etc. The power interface 130 may be a USB interface, IEEE13394 interface, etc. This embodiment does not impose any restrictions on the number, model, etc. of the power interface 130, which can be specifically selected or set according to actual conditions.

[0080] See also Figure 5 One embodiment of the present application provides a universal serial bus adapter system 20, including:

[0081] As for the universal serial bus adapter 10 as described above, the beneficial effects of the universal serial bus adapter 10 have been described in detail in the above embodiments, and will not be repeated here.

[0082] The external device 21 is signal-connected to the first interface 100 . The external device 21 may include multiple types, such as video equipment, audio equipment, and power supply equipment, etc. This embodiment does not specifically limit this and can be specifically selected according to actual conditions.

[0083] The main device 22 is signal-connected to the second interface 200 . The main device 22 may be a computer, a server, a tablet, a mobile phone, a single-chip microcomputer, etc. This embodiment does not specifically limit this and may be specifically selected according to actual conditions.

[0084] In one embodiment, the control circuit 500 is signal-connected to the first interface 100 and the second interface 200 respectively, the first interface 100 is signal-connected to the external device 21, and the second interface 200 is signal-connected to the main device 22. The control circuit 500 determines the type of the external device 21 through the signal input from the first interface 100. For example, when the main device 22 detects a first detection signal (DFP_CC1 & DFP_CC2) in the power interface 130, it determines that a power device is connected, and inputs the first detection signal to the main device 22 through the second interface 200. The main device 22 determines that a power device is connected through the first detection signal, thereby generating a first control signal, and transmitting the first control signal to the control circuit 500. The control circuit 500 controls the working state of the power processing circuit 400 based on the first control signal. On the contrary, if the first detection signal is not detected, it is determined that no power supply device is connected, and the control circuit 500 controls the power processing circuit 400 to supply power to the audio and video signal processing circuit 300 and the control circuit 500 through the main device 22 .

[0085] Similarly, the first interface 100 is connected to the signal converter signal. When the first interface 100 detects a second detection signal JD, the control circuit 500 transmits the second detection signal to the master device 22 through the second interface 200. The master device 22 determines that an audio or video device is connected through the second detection signal, thereby generating a second control signal. The control circuit 500 controls the signal converter 320 to start and enter a working state through the second control signal. Otherwise, the master device 22 determines that no audio or video device is connected, and controls the signal converter 320 to enter a dormant state through the control circuit 500.

[0086] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0087] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A universal serial bus adapter, characterized in that: include: A first interface, used to connect an external device, the external device includes an audio and video device and a power supply device; The second interface is used to connect to the main device; an audio and video signal processing circuit, wherein a first end of the audio and video signal processing circuit is connected to the first interface signal, a second end of the audio and video signal processing circuit is connected to the second interface signal, and the audio and video signal processing circuit is used to convert the audio and video signal input through the first interface and the high-speed signal input through the second interface into each other, and output them through the second interface and the first interface respectively; a power processing circuit, wherein a first end of the power processing circuit is electrically connected to the first interface, a second end of the power processing circuit is electrically connected to the second interface, and a third end of the power processing circuit is electrically connected to a power supply end of the audio and video signal processing circuit; The control circuit is respectively connected to the control end signals of the first interface and the power processing circuit. The control circuit is used to control the power processing circuit to connect the electrical connection between the first interface and the second interface and cut off the electrical connection between the power processing circuit and the audio and video signal processing circuit when there is only a power device in the external device; to control the power processing circuit to connect the electrical connection between the second interface and the power processing circuit when there is only an audio and video device in the external device; and to control the power processing circuit to connect the electrical connection between the first interface, the second interface and the power processing circuit when the external device includes both an audio and video device and a power device.

2. The universal serial bus adapter according to claim 1, characterized in that: The control circuit is used to When the external device includes a non-power device, the power processing circuit is controlled to input the power in the main device into the audio and video signal processing circuit and the control circuit through the second interface in sequence to supply power to the audio and video signal processing circuit and the control circuit.

3. The universal serial bus adapter according to claim 1, characterized in that: The power processing circuit comprises: a first power switch, wherein a first end of the first power switch is electrically connected to the first interface, and a second end of the first power switch is electrically connected to the second interface; A second power switch, wherein a first end of the second power switch is electrically connected to a third end of the first power switch, and a second end of the second power switch is electrically connected to a power end of the audio and video signal processing circuit.

4. The universal serial bus adapter according to claim 3, characterized in that: The power processing circuit also includes: A voltage regulator, wherein the input end of the voltage regulator is electrically connected to the third end of the first power switch, the output end of the voltage regulator is electrically connected to the power end of the audio and video signal processing circuit and the control circuit respectively, and the voltage regulator is used to convert the voltage output by the first power switch into a preset voltage.

5. The universal serial bus adapter according to claim 1, characterized in that: The audio and video signal processing circuit comprises: A protocol processor, a first end of which is signal-connected to the external device; A signal converter, wherein the first end of the signal converter is signal-connected to the second end of the protocol processor, the second end of the signal converter is signal-connected to the second interface, and the signal converter is used to convert the audio and video signals in the external device into high-speed signals.

6. The universal serial bus adapter according to claim 5, characterized in that: The audio and video signal processing circuit also includes: A signal switch, wherein the first end of the signal switch is signal-connected to the second end of the signal converter, the second end of the signal switch is signal-connected to the second interface, the control end of the signal switch is signal-connected to the control circuit, and the signal switch is used to switch the transmission direction of the high-speed signal.

7. The universal serial bus adapter according to claim 5, characterized in that: Also includes: A controller, connected to the control terminal of the protocol processor by signal, and used to control the operation of the protocol processor; The controller is also connected to the signal converter signal, and the controller is further used to wake up the signal converter when the signal converter signal is dormant.

8. The universal serial bus adapter according to claim 7, characterized in that: Also includes: The memory is connected to the controller signal.

9. The universal serial bus adapter according to claim 1, characterized in that: The first interface comprises: An audio interface, signal-connected to a first end of the audio and video signal processing circuit; A video interface, signal-connected to a first end of the audio and video signal processing circuit; A power interface is electrically connected to the first end of the power processing circuit.

10. A universal serial bus adapter system, characterized in that: include: A universal serial bus adapter as claimed in any one of claims 1 to 9; an external device connected to the first interface signal; A master device is connected to the second interface signal.

Images