Interface power supply device and display device

Abstract

An interface power supply device and a display device are used for ensuring normal transmission of data while realizing high-power charging. The interface power supply device comprises a Type-C interface, a video conversion module, a data transmission control module, a power supply module, a first filtering module and a second filtering module, the video conversion module is connected with a video port of the Type-C interface, converts video DP data output by the Type-C interface into multimedia data and outputs the multimedia data to a processor connected with a rear end; the data transmission control module is connected with the data port of the Type-C interface, and controls the connection between the data port of the Type-C interface and the processor according to the control signal sent by the processor; the power supply module is connected with a power supply port of the Type-C interface, obtains electric energy from a power supply, carries out voltage regulation on the obtained electric energy, and outputs the electric energy to external equipment of the Type-C interface; the first filtering module is connected between the power supply module and a power supply port of the Type-C interface; and the second filtering module is connected between the grounding wire of the power supply module and the grounding port of the Type-C interface.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power electronics, and particularly relates to an interface power supply device and a display device. BACKGROUND

[0002] At present, the type-c interface is increasingly used in the field of consumer electronics, especially in the application scene of multimedia devices. The full-function type-c interface can simultaneously support DP video source transmission, USB data transmission and PD fast charging, and the current market application generally supports 15W, 65W or even 100W power charging. However, the noise generated by the internal power module will also increase with the larger charging power, which is easy to interfere with the transmission of DP video and USB data signals, and affects the user experience. CONTENT OF THE UTILITY MODEL

[0003] The present application provides an interface power supply device and a display device, which are used to ensure normal data transmission while realizing large power charging.

[0004] In the first aspect, the present application provides an interface power supply device, which can be located on a display device and connected with an external electronic device through an interface. At this time, the display device can serve as a power supply, the external electronic device can serve as a powered device, and the power supply can supply power to the powered device. In actual application, the interface power supply device can include a first interface, a second interface, a data transmission module, a power supply module, a first filter module and a second filter module.

[0005] The video conversion module is connected with the video port of the Type-C interface, used to receive the video data output by the Type-C interface, convert the received video DP data into multimedia data and output the multimedia data to the processor connected at the back end; the data transmission control module is connected with the data port of the Type-C interface, used to control the connection between the data port of the Type-C interface and the processor according to the control signal sent by the processor; the power supply module is connected with the power supply port of the Type-C interface, used to obtain power from the power supply, and output the power after voltage regulation to the external device of the Type-C interface; the first filter module is connected between the power supply module and the power supply port of the Type-C interface; and the second filter module is connected between the ground wire of the power supply module and the ground port of the Type-C interface.

[0006] With the above design, the first filter module is connected between the power supply module and the power port of the Type-C interface, and can eliminate the interference signals carried in the power supply voltage output by the power supply module. The second filter module is connected between the ground wire of the power supply module and the ground port of the Type-C interface, and can eliminate the interference signals output by the power supply module and transmitted to the Type-C interface through the ground wire. Therefore, the above two filter modules can eliminate the interference signals on the connection path between the power supply module and the Type-C interface, thereby ensuring the normal transmission of data and making the device work normally.

[0007] In a possible design, to avoid overcurrent phenomenon in the power supply process, the interface power supply apparatus further includes a detection resistor connected between the ground wire of the power supply module and the ground port of the Type-C interface. The power supply module can detect a first current flowing through the detection resistor, and reduce the output power of the power supply module when it is determined that the first current is greater than a first preset threshold.

[0008] In a possible design, to avoid overcurrent phenomenon in the power supply process, the power supply module can further detect a second current output by the power supply module, and reduce the output power of the power supply module when it is determined that the second current is greater than a second preset threshold.

[0009] In a possible design, the first filter module and the second filter module include a plurality of parallel filter capacitors. In this case, each filter capacitor can serve as a filter branch for eliminating the interference signals on the path.

[0010] In a possible design, to filter interference signals of different frequencies, the capacitance values and package sizes of the plurality of filter capacitors in the first filter module and the second filter module are different, so that each filter capacitor can filter out interference signals of a specific frequency range.

[0011] In a possible design, the first filter module includes at least one filter capacitor and at least one filter inductor.

[0012] In a possible design, the first filter module is an LC filter.

[0013] In a possible design, the power supply module is further configured to control the connection between the power supply and the Type-C interface under the control of the processor.

[0014] In a possible design, the power supply module includes a voltage regulation circuit, where the voltage regulation circuit is configured to convert the voltage of the power supply into a power supply voltage of the Type-C interface connected device, and supply power to the Type-C interface connected device. With the above design, when the voltage output by the power supply does not meet the requirement of the external device on the power supply voltage, the voltage type or the voltage amplitude can be adjusted by the voltage regulation circuit to meet the requirement of the external device on the power supply voltage, and normal power supply of the external device is ensured.

[0015] In a second aspect, the embodiments of the present application provide a display device, which includes a power supply module, a processor, a display screen and the interface power supply device provided in the first aspect of the present application and any possible design thereof.

[0016] The power supply module supplies power to the processor, the display screen and the interface power supply device respectively; the processor acquires multimedia data output by the interface power supply device, and controls the display screen to display according to the acquired multimedia data.

[0017] In addition, the technical effects brought by the second aspect and any possible design thereof can be referred to the technical effects brought by different designs of the first aspect of the embodiments of the present application, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0019] Figure 1 Connection diagram of the interface power supply device provided by the embodiments of the present application Figure One ;

[0020] Figure 2 Connection diagram of the interface power supply device provided by the embodiments of the present application Figure Two ;

[0021] Figure 3 Structure diagram of the interface power supply device provided by the embodiments of the present application Figure One ;

[0022] Figure 4 Port diagram of the Type-C interface provided by the embodiments of the present application

[0023] Figure 5 Structure diagram of the interface power supply device provided by the embodiments of the present application Figure Two ;

[0024] Figure 6 A structure diagram of a second filter module provided for an embodiment of the present application Figure One ;

[0025] Figure 7 A structure diagram of a second filter module provided for an embodiment of the present application Figure Two ;

[0026] Figure 8 A structure diagram of an interface power supply device provided for an embodiment of the present application Figure Three ;

[0027] Figure 9 A structure diagram of a display device provided for an embodiment of the present application. DETAILED DESCRIPTION

[0028] The embodiments of the present application will be described in detail below with reference to the drawings.

[0029] The terms used in the embodiments of the present application are only used to explain the specific embodiments of the present application, and are not intended to limit the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0030] In the following, some terms in the embodiments of the present application are explained and described, so as to facilitate the understanding of those skilled in the art.

[0031] (1) The terms "first", "second", etc. in the embodiments of the present application are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0032] (2) "Multiple" in the embodiments of the present application means two or more, and other quantifiers are similar.

[0033] (3) In the embodiments of the present application, "and / or" describes the association relationship of the associated objects, which means that there can be three kinds of relationships, for example, A and / or B, which can represent the following cases: A exists alone, A and B exist together, and B exists alone, where A and B can be singular or plural.

[0034] (4) The "connection" in the embodiments of the present application can be understood as an electrical connection or a communication connection. The electrical connection between two electrical elements can be a direct or indirect connection between the two electrical elements. For example, A is connected to B, which can be a direct connection between A and B, or an indirect connection between A and B through one or more other electrical elements, for example, A is directly connected to C, C is directly connected to B, and A and B are connected through C. The communication connection between two electrical elements is a wireless connection between the two electrical elements, i.e., an electromagnetic connection between the two electrical elements.

[0035] (5) The switching device in the embodiments of the present application can be one or more of metal oxide semiconductor field effect transistors (MOSFETs), bipolar junction transistors (BJTs), insulated gate bipolar transistors (IGBTs), silicon carbide (SiC) transistors, silicon controlled rectifiers (SCRs), and other types of switching tubes. The embodiments of the present application do not list them one by one. The packaging form of each switching tube can be single-tube packaging or multi-tube packaging, and the embodiments of the present application do not limit it much. Each switching tube can include a first end, a second end, and a control end, wherein the control end can control the conduction or turn-off of the switching tube according to the received PWM signal. When the switching tube is turned on, the first end and the second end of the switching tube can transmit current, and when the switching tube is turned off, the first end and the second end of the switching tube cannot transmit current. Taking MOSFET as an example, the control end of the switching tube is the gate, the first end of the switching tube can be the source, and the second end can be the drain, or the first end can be the drain, and the second end can be the source.

[0036] The application scenarios of the interface power supply device in the embodiments of the present application will be described in detail below in combination with the drawings.

[0037] The interface power supply device provided in the embodiments of the present application can be applied to devices with external interfaces, such as display devices. The device can be connected to an electronic device through the set external interface and communicate with the electronic device. For example, as shown in Figure 1 , the device where the interface power supply device is located can be a notebook computer 10A, and the external electronic device can be a mobile phone 10B. The notebook computer 10A and the mobile phone 10B are both provided with external interfaces, and the notebook computer 10A and the mobile phone 10B can be connected through a data line 20. At this time, the notebook computer 10A can charge the mobile phone 10B, and the notebook computer 10A and the mobile phone 10B can interact with data. Referring to Figure 2As shown, the device where the interface power supply device is located can also be a projector, and the external electronic device can be a notebook computer. The notebook computer and the projector are both provided with an external interface, and the notebook computer and the projector can be connected through a data line. At this time, the projector can charge the notebook computer, and the notebook computer transmits data to the projector. If the projector has a control button or a display screen that can be touched to operate, the projector can also transmit data to the notebook computer. In actual application, the electronic device includes but is not limited to a mobile phone, a computer, a notebook computer, and a tablet computer. In order to facilitate understanding of the scheme claimed in the present application, the device where the interface power supply device is located is taken as a projector, and the external electronic device is taken as a notebook computer for example.

[0038] Referring to Figure 3 As shown, it is a structural schematic diagram of the interface power supply device provided by the embodiment of the present application. As shown in Figure 3 As shown, the interface power supply device can include a Type-C interface, a video conversion module, a data transmission control module, a power supply module, a first filter module, and a second filter module.

[0039] It should be understood that, Figure 3 The structure of the interface power supply device shown is only an example. The interface power supply device can have more components than those shown in Figure 3 The various components shown in Figure 3 The various components shown in

[0040] In actual application, as shown, Figure 4 As shown, a general Type-C interface has a plurality of functional ports, each of which can be connected with different devices, so as to realize the functions corresponding to the Type-C interface. In actual application, referring to Figure 5As shown, the video conversion module can be connected with the video port RX+ and TX- of the Type-C interface, receive the video DP data transmitted by the external electronic device through the video port, convert the received video DP data into multimedia data, such as data conforming to the High-Definition Multimedia Interface transmission protocol, and output the converted data to the processor so that the processor drives the connected display screen to display images using the data. The data transmission control module can be connected with the data port D+ and D- of the Type-C interface, receive the USB data transmitted by the external electronic device through the data port, and control the data transmission function of the interface power supply device by receiving the control signal output by the processor. The power supply module can be connected with the power port VBUS of the Type-C interface and receive the power from the power supply in the device where the interface power supply device is located. The power supply module generally consists of multiple switching devices and other devices. The processor can control the charging function of the interface power supply device by outputting the on and off of the switching devices using the data transmitted through the Type-C interface and the charging protocol.

[0041] In actual application, the interface power supply device, the processor and the power supply can be fixed on one device, which can also have other functional devices, such as the above-mentioned device can also include a display screen. The processor can process the data output by the video conversion module in the interface power supply device and drive the display screen to display corresponding images. If the display screen has a touch function, the interface power supply device can also receive the touch signal of the display screen through the processor and transmit the signal to the connected external electronic device. The interface power supply device can be provided with a fixed interface, and the processor and the power supply can be fixedly connected with the interface power supply device through transmission lines and the fixed interface

[0042] In an example, the multiple devices in the interface power supply device can be placed on the same Printed Circuit Board (PCB), and the processor and the power supply are located on another PCB. The PCB where the interface power supply device is located can be provided with a connector for connecting with the power supply and the processor. The interface power supply device can obtain the power output by the power supply and transmit data to the processor through the connector.

[0043] In another example, the multiple devices in the interface power supply device, the processor and the power supply are located on the same Printed Circuit Board (PCB). By providing reasonable wiring on the PCB, the connection between the multiple devices in the interface power supply device and the processor and the power supply is realized.

[0044] Referring to Figures 3 to 5The interface power supply device shown, the power supply module can obtain the power supply in the device, and power supply for the external device connected through the Type-C interface. When the external device needs high-power supply, the power supply module output may carry a large amount of interference signals and transmit to the Type-C interface, resulting in the impact of normal transmission data, affecting the user experience. In actual use, the interference signal can be transmitted to the power supply port of the Type-C interface through the power transmission line between the power supply module and the Type-C interface, and also can be transmitted to the ground port of the Type-C interface through the ground line of the power supply module. In order to ensure the normal transmission of data, the interface power supply device of the embodiment of the present application is configured with two filter modules. The first filter module can be connected between the power supply module and the power supply port VBUS of the Type-C interface, and is used for filtering the interference signals on the power transmission line of the power supply module. The second filter module is connected between the ground line of the power supply module and the ground port of the Type-C interface, and is used for filtering the interference signals transmitted on the ground line of the power supply module. Since the filter module for filtering the interference signal is configured on the connection path between the power supply module and the Type-C interface, the interference signal generated by the power supply module cannot cause the data transmitted by the Type-C interface, so as to ensure the data transmission effect. In the following, in order to distinguish the ground port of the power supply module and the ground port of the Type-C interface, the ground port of the Type-C interface is taken as PGND, and the ground port of the power supply module is taken as GND for example.

[0045] Among them, the video conversion module, the data transmission control module and the power supply module in the interface power supply device can adopt the chip or discrete device with the above functions in the industry, and the present application does not introduce one by one here.

[0046] In actual application, the input end of the power supply module can be connected with the power supply, and the output end of the power supply module can be connected with the power port VBUS of the Type-C interface through the first filter module. The power supply module can be a voltage regulation circuit, which regulates the voltage of the power supply and outputs to the external electronic device through the Type-C interface, so as to output power supply energy meeting the demand of the connected electronic device. When the output power of the power supply can meet the demand of the electronic device for power supply energy, the power supply module can only be used for transmitting power, and the power output by the power supply is output to the external electronic device through the Type-C interface and supplies power to the external electronic device. The amplitude and type of the power supply voltage and the power supply current can be determined according to the type of the electronic device and the charging protocol. The charging protocol can be the power delivery PD3.0 protocol or other protocols in the industry, which are not limited herein. When the power supply module supplies high-power to the external electronic device, a large amount of interference signals can be carried in the power output by the power supply module. If the above interference signals are transmitted to the Type-C interface through the transmission line, the video data can be interfered, and the normal transmission of data can be affected. The process of filtering the interference signals output by the power supply module by the two filter modules in the interface power supply device is described in detail below.

[0047] The first filter module is connected between the output end of the power supply module and the power supply port VBUS of the Type-C interface, and can filter the interference signals on the transmission line connected with the output end of the power supply module. The second filter module is connected between the ground port GND of the power supply module and the ground port PGND of the Type-C interface, and can effectively avoid the interference signals from being transmitted to the Type-C interface through the transmission module of the power supply module. Since the filter modules are arranged on the paths of the interference signals transmitted to the Type-C interface, the interference signals can be effectively prevented from being transmitted to the Type-C interface, so as to ensure the normal data interaction between the device where the interface power supply device is located and the external electronic device.

[0048] In actual use, the first filter module can be composed of a filter capacitor with a filtering function, or composed of a filter capacitor and a filter inductor with a filtering function. Several examples of the first filter module and the second filter module are given below.

[0049] In some embodiments, referring to Figure 6As shown, the first filter module and the second filter module can each include a plurality of filter capacitors C. Among them, the plurality of filter capacitors in each filter module can be connected in parallel, and the capacitance values of each filter capacitor are different. At this time, each filter capacitor can serve as a filter branch to filter the interference signals of different frequencies on the line, so that the interference signals on the power supply module cannot be transmitted to the ground port PGND of the Type-C interface and the power supply port VBUS of the Type-C interface, ensuring that the interface power supply device can normally transmit data.

[0050] In actual application, the capacitance values of the parallel filter capacitors can be configured according to the frequency of the interference signal and the working frequency of the transmitted data, which will not be described here.

[0051] In some embodiments, the interface power supply device can further include a second filter module connected in series with the first filter module. Figure 7 As shown, the first filter module and the second filter module can each include at least one filter capacitor C and at least one filter inductor L.

[0052] In actual application, the capacitance values of the filter capacitors and the inductance values of the filter inductors can be configured according to the frequency of the interference signal and the working frequency of the transmitted data, which will not be described here.

[0053] Among them, Figure 7 The LC filter used in the first filter module and the second filter module shown is only for illustration. In actual application, the filter structure of the second filter module can adopt a T-shaped filter structure or a Π-shaped filter structure, and of course, other filter structures commonly used in the industry can also be adopted, which will not be specifically limited here.

[0054] It should be noted that Figure 6 And Figure 7 The first filter module and the second filter module adopt the same filter structure as an example for description. In actual application, the first filter module can have the same structure as the second filter module, or the first filter module can adopt a different filter structure from the second filter module. Of course, the first filter module and the second filter module can also adopt other filter structures commonly used in the industry, which will not be limited here.

[0055] In combination with the above description, the interface power supply device provided by the embodiments of the present application can effectively eliminate the interference signals generated during high-power power supply through the configured first filter module and the second filter module while realizing the power supply function and data transmission function of the interface power supply device, thereby ensuring the data transmission effect of the interface power supply device. In actual application, in addition to the above-mentioned devices, the interface power supply device can also include other functional devices, for example, the interface power supply device can also include a protection device. The following will take the interface power supply device configured with an overcurrent protection functional device as an example for description.

[0056] In some implementations, with Figure 6 For example, see the interface power supply device shown. Figure 8 As shown, the interface power supply device also includes a sensing resistor R connected between the ground port GND of the power supply circuit and the ground port PGND of the Type-C interface. The power supply module can detect a first current flowing through the sensing resistor R. When it is determined that the first current is greater than a first preset threshold, the output power of the power supply circuit is reduced, thereby providing overcurrent protection for the power supply process. The power supply module can obtain the first current flowing through the sensing resistor R by configuring a current sensor. The value of the first preset threshold can be set according to the charging power defined by the charging protocol, which will not be described in detail here.

[0057] In some embodiments, the interface power supply device can be configured with a current sensor or an external current sensor. The input terminal of the current sensor is connected to the output terminal of the power supply module, and the output terminal of the current sensor is connected to the power supply module. The power supply module can detect a second current output by the current sensor. When the second current is determined to be greater than a second preset threshold, the output power of the power supply module is reduced, thereby providing overcurrent protection for the power supply process. The value of the second preset threshold can be set according to the charging power defined by the charging protocol, which will not be described in detail here.

[0058] It should be noted that the above is an example of an overcurrent protection device. In actual applications, the interface power supply device provided in this application embodiment may also include other protection devices or other functional devices. This application does not impose any further limitations here.

[0059] In conjunction with the above description, embodiments of this application also provide a display device, see [link to relevant documentation]. Figure 9 As shown, the display device may include: a power module, a processor, a display screen, and the aforementioned interface power supply device.

[0060] The power module, serving as the power supply for multiple components within the display device, can be connected to an external power source and convert its voltage to the supply voltage for the various internal components, thereby powering the processor, display screen, and interface power supply unit. The processor receives multimedia data output from the interface power supply unit and controls the display screen to display the data accordingly.

[0061] It should be noted that if the processor, display screen, and interface power supply have different power supply voltage requirements, for example, the processor and interface power supply require 5V, while the display screen requires 12V, the power module can include multiple voltage regulation circuits, each of which outputs a different power supply voltage to meet the power supply voltage requirements of different devices.

[0062] It should be noted that the process of the interface power supply device powering the external electronic device and the process of data interaction with the external electronic device can be seen from the foregoing related description, and will not be repeated here.

[0063] In various embodiments of the present application, the terms and / or descriptions of different embodiments are consistent and can be mutually referred to if there is no special description and logical conflict, and the technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationship.

[0064] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.

Claims

1. An interface power supply device, characterized by comprising: The interface power supply device comprises a Type-C interface, a video conversion module, a data transmission control module, a power supply module, a first filter module and a second filter module. The video conversion module is connected with a video port of the Type-C interface, and is configured to receive video data output by the Type-C interface, convert the received video DP data into multimedia data, and output the multimedia data to a processor connected at a rear end. The data transmission control module is connected with a data port of the Type-C interface, and is configured to control connection between the data port of the Type-C interface and the processor according to a control signal sent by the processor. The power supply module is connected with a power supply port of the Type-C interface, and is configured to obtain electric energy from a power supply, and output the obtained electric energy to an external device of the Type-C interface after voltage regulation. The first filter module is connected between the power supply module and the power supply port of the Type-C interface. The second filter module is connected between a ground wire of the power supply module and a ground port of the Type-C interface. The interface power supply device further comprises a detection resistor connected between the ground wire of the power supply module and the ground port of the Type-C interface, and the power supply module is further configured to detect a first current flowing through the detection resistor, and reduce output power of the power supply module when it is determined that the first current is greater than a first preset threshold.

2. The apparatus of claim 1, wherein, The power supply module is further configured to detect a second current output by the power supply module, and reduce output power of the power supply module when it is determined that the second current is greater than a second preset threshold.

3. The apparatus of claim 1, wherein, The first filter module and the second filter module comprise a plurality of parallel filter capacitors.

4. The apparatus of claim 1, wherein, The first filter module and the second filter module comprise a plurality of parallel filter capacitors.

5. The apparatus of claim 4, wherein, The first filter module comprises at least one filter capacitor and at least one filter inductor.

6. The apparatus of claim 1, wherein, The first filter module is an LC filter.

7. The apparatus of claim 6, wherein, The power supply module is further configured to control connection between the power supply and the Type-C interface under control of the processor.

8. The apparatus of claim 1, wherein, The power supply module comprises a voltage regulation circuit configured to convert voltage of the power supply into power supply voltage of a device connected with the Type-C interface, and supply power to the device connected with the Type-C interface.

9. The apparatus of claim 1, wherein, The interface power supply device comprises a Type-C interface, a video conversion module, a data transmission control module, a power supply module, a first filter module and a second filter module.

10. A display device, characterized by comprising: The power supply module supplies power to the processor, the display screen and the interface power supply device. The processor obtains multimedia data output by the interface power supply device, and controls the display screen to display according to the obtained multimedia data. ​ ​

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