Video signal access module and display device

Abstract

The embodiment of the utility model discloses a video signal access module and display equipment. According to the technical scheme provided by the embodiment of the invention, the signal access unit accesses the video output port of the external equipment, the power supply unit is connected with the power supply input end of the external equipment, and the connection detection unit performs interface connection detection on the signal access unit and the power supply unit and sends the interface connection detection result to the control unit; the control unit can maintain external power supply of the power supply unit when the interface connection detection result is that the power supply unit and the signal access unit are both in the access state, thereby effectively reducing the conditions that the handshake with the video interface fails and the video signal cannot be correctly received due to the operation that the power supply unit is powered off and then powered on again, and effectively ensuring the video signal access effect.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of electronic technology, and in particular to a video signal access module and a display device. Background Art

[0002] There are various peripheral products that can be used with complete products such as smart interactive tablets. When the smart interactive tablet is connected to the peripheral products to interact with them, it can also provide power for some peripheral products. For example, peripheral products such as box generators can provide video data to the smart interactive tablet, and the box generator is powered through the power supply interface (such as USB interface) provided by the smart interactive tablet.

[0003] When the smart interactive tablet detects the access of the video signal, it will switch the video channel, and the power supply interface will be powered off and then powered on again during the switching process of the video channel. At this time, the video interface handshake failure is likely to occur, resulting in the inability to correctly receive the video signal, and the video signal access effect is poor. Utility Model Content

[0004] The embodiment of the present application provides a video signal access module and a display device to solve the technical problem that the video interface handshake failure is prone to occur during the switching of video channels in the related technology, resulting in the inability to correctly receive the video signal and the poor video signal access effect, and can effectively improve the video signal access effect.

[0005] In a first aspect, an embodiment of the present application provides a video signal access module, including a signal access unit, a power supply unit, a connection detection unit and a control unit, wherein:

[0006] The signal access unit is connected to the control unit and is used to connect to a video output port of an external device so as to send external data provided by the external device to the control unit;

[0007] The power supply unit is connected to the control unit and is used to access the power supply input terminal of the external device to supply power to the external device;

[0008] The connection detection unit is connected to the signal access unit, the power supply unit and the control unit, and is used to perform interface connection detection on the signal access unit and the power supply unit, and send the interface connection detection result to the control unit;

[0009] The control unit is used for maintaining the external power supply of the power supply unit when the interface connection detection result is that the power supply unit and the signal access unit are both in the connected state.

[0010] The embodiment of the present application connects to the video output port of the external device through the signal access unit, and connects to the power supply input terminal of the external device through the power supply unit. At the same time, the signal access unit and the power supply unit are detected by the connection detection unit and the interface connection detection result is sent to the control unit. The control unit can maintain the external power supply of the power supply unit when the interface connection detection result shows that the power supply unit and the signal access unit are both in the connected state, effectively reducing the situation where the handshake with the video interface fails due to the operation of powering off and then powering on the power supply unit, and the video signal cannot be received correctly, thereby effectively ensuring the video signal access effect.

[0011] Furthermore, the connection detection unit includes an AND gate circuit, a first input end of the AND gate circuit is connected to the signal access unit, a second input end of the AND gate circuit is connected to the power supply unit, and an output end of the AND gate circuit is connected to the control unit.

[0012] As described above, by performing interface connection detection through the AND gate circuit, it is accurately detected whether the power supply unit and the signal access unit are both in the connected state, or at least one of the power supply unit and the signal access unit is in the unconnected state, and the power supply unit is accurately controlled to ensure the video signal access effect.

[0013] Furthermore, the first input terminal of the AND gate circuit is connected to a power pin of the signal access unit.

[0014] In the above, by connecting the first input end of the AND gate circuit to the power pin of the signal access unit, whether the external device is connected is accurately reflected according to the different potential conditions of the power pin of the signal access unit, thereby improving the detection accuracy of the access status of the signal access unit and improving the video signal access effect.

[0015] Furthermore, the second input terminal of the AND gate circuit is connected to a power pin of the power supply unit.

[0016] In the above, by connecting the second input end of the AND gate circuit to the power pin of the power supply unit, whether the external device is connected is accurately reflected according to the different potential conditions of the power pin of the power supply unit, thereby improving the detection accuracy of the access status of the power supply unit and improving the video signal access effect.

[0017] Furthermore, the signal access unit is an HDMI access unit and / or a DP access unit, and / or the power supply unit is a USB power supply unit.

[0018] As described above, by accessing the video output port of an external device through the HDMI access unit and / or the DP access unit, and / or accessing the power input terminal of an external device through a USB power supply unit, communication between the control unit and the external device and power supply control of the external device are achieved.

[0019] Furthermore, the power supply unit is configured as a plurality of units, and the number of the connection detection units is consistent with the number of the power supply units, wherein:

[0020] The first input end of each of the connection detection units is connected to the signal access unit, and the second input end of each of the connection detection units is connected to one of the power supply units respectively;

[0021] The connection detection unit is used to perform interface connection detection on the signal access unit and the connected power supply unit, and send the interface connection detection result to the control unit;

[0022] The control unit is used to maintain external power supply of the power supply unit corresponding to the first interface connection detection result when there is a first interface connection detection result that the power supply unit and the signal access unit are both in the connected state.

[0023] As mentioned above, when there are multiple power supply units, the connection status of the power supply units is detected by a connection detection unit respectively, which can accurately determine the power supply unit connected to the external device and maintain the power supply of the corresponding power supply unit, effectively ensuring the video signal access effect and realizing flexible control of video signal access under multiple power supply units.

[0024] Furthermore, the signal access unit is configured as a plurality of units, and the number of the connection detection units is consistent with the number of the signal access units, wherein:

[0025] The first input end of each of the connection detection units is connected to one of the signal access units, and the second input end of the connection detection unit is connected to the power supply unit;

[0026] The connection detection unit is used to perform interface connection detection on the connected signal access unit and the power supply unit, and send the interface connection detection result to the control unit.

[0027] As described above, when there are multiple signal access units, the connection status of the power supply unit is detected by multiple connection detection units, and the connection status of the connected signal access units is detected by each connection detection unit respectively, so that the status of the power supply unit and each signal access unit being simultaneously connected to the external device can be accurately determined, the power supply of the corresponding power supply unit can be accurately maintained, the video signal access effect can be effectively guaranteed, and flexible control of video signal access under multiple signal access units can be realized.

[0028] Furthermore, the signal access unit is configured as a plurality of units, and the number of the connection detection units is consistent with the number of the signal access units, wherein:

[0029] The first input end of each of the connection detection units is connected to one of the signal access units, and the second input end of each of the connection detection units is connected to the power supply unit;

[0030] The connection detection unit is used to perform interface connection detection on the connected signal access unit and the power supply unit, and send the interface connection detection result to the control unit;

[0031] The control unit is used to maintain external power supply of the power supply unit corresponding to the first interface connection detection result when there is a first interface connection detection result that the power supply unit and the signal access unit are both in the connected state.

[0032] As described above, when there are multiple signal access units, the connection status of the power supply unit is detected respectively through multiple connection detection units, and the connection status of the connected signal access unit is detected respectively through each connection detection unit, so that the connection status of the power supply unit and each signal access unit can be accurately determined, and the power supply control of the power supply unit can be accurately determined, thereby effectively ensuring the video signal access effect and realizing flexible control of video signal access under multiple signal access units.

[0033] Further, the signal access unit and the power supply unit are both configured in plurality, and the number of the connection detection units is consistent with the product of the number of the signal access units and the power supply units, wherein:

[0034] The first input end of each of the connection detection units is connected to one of the signal access units, and the second input end of each of the connection detection units is connected to one of the power supply units.

[0035] The connection detection unit is used to perform interface connection detection on the connected signal access unit and the connected power supply unit, and send the interface connection detection result to the control unit;

[0036] The control unit is used to maintain external power supply of the power supply unit corresponding to the first interface connection detection result when there is a first interface connection detection result that the power supply unit and the signal access unit are both in the connected state.

[0037] As mentioned above, when there are multiple signal access units and signal access units, the connection status of the power supply unit and the signal access unit is detected respectively through multiple connection detection units, the connection status of the power supply unit and each signal access unit can be accurately determined, the power supply control of the power supply unit can be accurately determined, the video signal access effect is effectively guaranteed, and flexible control of video signal access under multiple signal access units and multiple power supply units is realized.

[0038] In a second aspect, an embodiment of the present application provides a display device, comprising the video signal access module described in any one of the first aspects.

[0039] The embodiment of the present application connects to the video output port of the external device through the signal access unit, and connects to the power supply input terminal of the external device through the power supply unit. At the same time, the signal access unit and the power supply unit are detected by the connection detection unit and the interface connection detection result is sent to the control unit. The control unit can maintain the external power supply of the power supply unit when the interface connection detection result shows that the power supply unit and the signal access unit are both in the connected state, effectively reducing the situation where the handshake with the video interface fails due to the operation of powering off and then powering on the power supply unit, and the video signal cannot be received correctly, thereby effectively ensuring the video signal access effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic diagram of a video signal access device in the prior art;

[0041] Figure 2 It is a principle block diagram of a video signal access module provided in an embodiment of the present application;

[0042] Figure 3 is a structural diagram of a second video signal access module provided in an embodiment of the present application;

[0043] Figure 4 is a structural diagram of a third video signal access module provided in an embodiment of the present application;

[0044] Figure 5 is a structural diagram of a fourth video signal access module provided in an embodiment of the present application;

[0045] Figure 6 is a structural diagram of a fifth video signal access module provided in an embodiment of the present application;

[0046] Figure 7 is a structural diagram of a sixth video signal access module provided in an embodiment of the present application;

[0047] Figure 8 It is a principle block diagram of a display device provided in an embodiment of the present application.

[0048] Figure numerals: 1. signal access unit; 2. power supply unit; 3. connection detection unit; 4. control unit. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solution and advantages of the present application clearer, the specific embodiments of the present application are further described in detail below in conjunction with the accompanying drawings. It is understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for the sake of ease of description, only the parts related to the present application are shown in the accompanying drawings, rather than all the contents.

[0050] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0051] The video signal access module provided in the present application performs interface connection detection on the signal access unit and the power supply unit through a connection detection unit and sends the interface connection detection result to the control unit. When the control unit detects that the power supply unit and the signal access unit are both in an access state, the control unit maintains the external power supply of the power supply unit to ensure the video signal access effect.

[0052] like Figure 1 As shown in the schematic diagram of a video signal access device in the prior art, it is assumed that the video signal access device is a smart interactive tablet, and a control unit ( Figure 1 SoC), a signal access unit and a power supply unit, wherein the signal access unit (e.g. Figure 1 The smart interactive tablet can be connected to an external device (the external device can be a device that can output video signals, such as a video player box, a projection device, etc.) through the signal access unit. For example, the video output terminal of the external device (such as the HDMI-IN interface in the figure) is connected to the control unit. Figure 1 HDMI-OUT interface) to transmit video signals and related data to external devices, and can also be connected to the power supply input end of the external device (such as Figure 1 The power supply unit can be connected to a USB port (such as a USB-B port) to power external devices (for example, to provide 5V power to external devices). In addition to powering external devices, the power supply port can also be used to connect other external devices and achieve communication and / or power supply with other external devices. For example, when the power supply unit provides a USB port, the power supply unit can be connected to external devices such as a USB flash drive.

[0053] When the control unit of the existing smart interactive tablet detects the access of the video signal, it will switch the video channel of the output video from the system channel (such as the Android channel, the Windows channel, etc.) to the external video channel (such as the HDMI channel), and the control unit and the external device will also perform a handshake operation through the signal access unit to ensure the correct transmission of the video signal. At the same time, in the process of switching the video channel, in order to solve the compatibility problem of the power supply interface (such as the compatibility problem of USB), the power supply unit will be controlled to cut off the power and then restart the power. However, during the handshake process between the external device and the control unit, it is necessary to ensure the stability of the signal output of the external device. If the power supply is cut off during this process, the external device will be cut off and unable to output the signal normally. Since the video signal line of the external device is always connected to the signal access unit of the smart interactive tablet, when the power is re-supplied to the external device, it is easy to fail to trigger the handshake operation between the control unit and the external device, resulting in the video signal being unable to be transmitted normally and the video signal access effect being poor.

[0054] The prior art generally optimizes video signal access through pure software control, for example, the signal access unit and the power supply unit are independently controlled, and the power supply unit is forced not to lose power through software. However, this video signal access optimization method may cause a problem of probabilistic failure to recognize the USB flash drive when the power supply interface is inserted into the USB flash drive. This is because if USB-A is always powered, when switching to HDMI or other channels, the USB and SOC are always connected and are not disconnected in time, which will cause other channels to fail to recognize the USB flash drive. Based on this, a video signal access module according to an embodiment of the present application is provided to solve the technical problem that the existing video signal access solution is prone to video interface handshake failure during the switching process of the video channel, resulting in the inability to correctly receive the video signal, and the video signal access effect is poor.

[0055] Figure 2 A principle block diagram of a video signal access module provided in an embodiment of the present application is given, and the video signal access module includes a signal access unit 1, a power supply unit 2, a connection detection unit 3 and a control unit 4. The signal access unit 1 provided in the present solution is connected to the control unit 4, the power supply unit 2 is connected to the control unit 4, and the connection detection unit 3 is connected to the signal access unit 1, the power supply unit 2 and the control unit 4.

[0056] The signal access unit 1 provided in this solution can be used to connect to the video output port of the external device to send external data provided by the external device to the control unit 4, and the power supply unit 2 can be used to access the power supply input end of the external device to supply power to the external device. In one embodiment, the power supply unit 2 can be connected to the power supply module inside the device. After the power supply input end of the external device is connected to the power supply unit 2, the power supply module supplies power to the external device through the power supply unit 2 to ensure the normal operation of the external device.

[0057] Among them, the connection detection unit 3 is used to perform interface connection detection on the signal access unit 1 and the power supply unit 2, and send the interface connection detection result to the control unit 4. The interface connection detection result can indicate the connection status of the interface between the signal access unit 1 and the power supply unit 2, so as to reflect whether the signal access unit 1 and the power supply unit 2 are connected to the video output port and the power supply input terminal of the external device through the interface. For example, when the signal access unit 1 and the power supply unit 2 are respectively connected to the video output port and the power supply input terminal of the external device through the data line, the interface connection detection result output by the connection detection unit 3 indicates that the power supply unit 2 and the signal access unit 1 are both in the connected state, and when at least one of the signal access unit 1 and the power supply unit 2 is not connected to the video output port and the power supply input terminal of the external device, the interface connection detection result output by the connection detection unit 3 indicates that at least one of the power supply unit 2 and the signal access unit 1 is in the unconnected state.

[0058] In one embodiment, the connection detection unit 3 may send different level signals as different connection detection results to the control unit 4. For example, when the interface connection detection result indicates that the power supply unit 2 and the signal access unit 1 are both in the connected state, the connection detection unit 3 may output a first level signal, and when the interface connection detection result indicates that at least one of the power supply unit 2 and the signal access unit 1 is in the unconnected state, the connection detection unit 3 outputs a second level signal, and optionally, the first level signal may be a high level signal or a low level signal, and the second level signal may be a low level signal or a high level signal.

[0059] In a possible embodiment, the signal access unit 1 provided in this solution may be an HDMI access unit (providing an HDMI interface) and / or a DP access unit (providing a DP interface), etc., and the power supply unit 2 may be a USB power supply unit 2 (providing a USB interface). This solution accesses the video output port of an external device through an HDMI access unit and / or a DP access unit, etc., and accesses the power supply input terminal of an external device through a USB power supply unit 2, thereby realizing communication between the control unit 4 and the external device and power supply control of the external device.

[0060] The control unit 4 provided in this solution is used to maintain the external power supply of the power supply unit 2 when the interface connection detection result shows that both the power supply unit 2 and the signal access unit 1 are in the connected state, that is, the power supply unit 2 is not controlled to execute the power-off and power-on operation, during which the power supply unit 2 maintains the power supply to the external device. When the interface connection detection result shows that at least one of the power supply unit 2 and the signal access unit 1 is in the disconnected state, it is not necessary to maintain the external power supply of the power supply unit 2, that is, when it is detected that the signal access unit 1 is connected to the external device, the power supply unit 2 can be controlled to execute the power-off and power-on operation.

[0061] As described above, the video output port of the external device is connected through the signal access unit 1, and the power supply input terminal of the external device is connected through the power supply unit 2. At the same time, the signal access unit 1 and the power supply unit 2 are detected by the connection detection unit 3, and the interface connection detection result is sent to the control unit 4. The control unit 4 can maintain the external power supply of the power supply unit 2 when the interface connection detection result shows that the power supply unit 2 and the signal access unit 1 are both in the connected state, effectively reducing the operation of powering off and then powering on the power supply unit 2, resulting in the failure of the handshake with the video interface and the inability to correctly receive the video signal, effectively ensuring the video signal access effect, improving the display compatibility and stability of the interactive smart tablet when used with different peripherals, and improving the competitiveness of the product.

[0062] Based on the above embodiments, Figure 3 A schematic diagram of the structure of a second video signal access module provided in an embodiment of the present application is given, and the video signal access module can be further configured on the basis of the above-mentioned video signal access module. The video signal access module provided in this solution includes a signal access unit 1, a power supply unit 2, a connection detection unit 3 and a control unit 4. Among them, the connection detection unit 3 provided in this solution includes an AND gate circuit, a first input end of the AND gate circuit is connected to the signal access unit 1, a second input end of the AND gate circuit is connected to the power supply unit 2, and an output end of the AND gate circuit is connected to the control unit 4.

[0063] Among them, the AND gate circuit outputs different connection detection results to the control unit 4 by outputting different level signals to the control unit 4. For example, when the signal access unit 1 and the power supply unit 2 are respectively connected to the video output port and the power supply input terminal of the external device through the data line, the AND gate circuit outputs a first level signal (for example, a high level signal) to the control unit 4 to output to the control unit 4 an interface connection detection result indicating that the power supply unit 2 and the signal access unit 1 are both in a connected state; and when at least one of the signal access unit 1 and the power supply unit 2 is not connected to the video output port and the power supply input terminal of the external device, the AND gate circuit outputs a second level signal (for example, a low level signal) to the control unit 4 to output to the control unit 4 an interface connection detection result indicating that at least one of the power supply unit 2 and the signal access unit 1 is in a non-connected state.

[0064] In one embodiment, the first input end of the AND gate circuit provided by the present solution is connected to the power pin of the signal access unit 1. For example, the 5V pin of the signal access unit 1 is used as a detection pin (e.g., HDMI_5V pin). When an external device is connected to the signal access unit 1 via a video cable (e.g., an HDMI cable), the first input end of the AND gate circuit detects the input of a high-level signal. When the signal access unit 1 is not connected to an external device, the first input end of the AND gate circuit detects the input of a low-level signal. The present solution connects the first input end of the AND gate circuit to the power pin of the signal access unit 1, accurately reflects whether an external device is connected according to different potential conditions of the power pin of the signal access unit 1, improves the detection accuracy of the access status of the signal access unit 1, and improves the video signal access effect.

[0065] In one embodiment, the second input end of the AND gate circuit provided in this solution is connected to the power pin of the power supply unit 2. For example, the 5V pin of the power supply unit 2 is used as the detection pin. When the external device is connected to the power supply unit 2 via a data line (such as a USB line), the second input end of the AND gate circuit detects the input of a high-level signal, and when the power supply unit 2 is not connected to the external device, the second input end of the AND gate circuit detects the input of a low-level signal. This solution connects the second input end of the AND gate circuit to the power pin of the power supply unit 2, accurately reflects whether the external device is connected according to the different potential conditions of the power pin of the power supply unit 2, improves the detection accuracy of the access status of the power supply unit 2, and improves the video signal access effect.

[0066] As described above, the video output port of the external device is connected through the signal access unit 1, and the power supply input terminal of the external device is connected through the power supply unit 2. At the same time, the signal access unit 1 and the power supply unit 2 are detected by the connection detection unit 3, and the interface connection detection result is sent to the control unit 4. The control unit 4 can maintain the external power supply of the power supply unit 2 when the interface connection detection result shows that the power supply unit 2 and the signal access unit 1 are both in the connected state, effectively reducing the situation where the power supply unit 2 fails to handshake with the video interface and cannot correctly receive the video signal due to the power-off and power-on operation of the power supply unit 2, and effectively ensuring the video signal access effect. At the same time, the interface connection detection is performed by the AND gate circuit to accurately detect whether the power supply unit 2 and the signal access unit 1 are both in the connected state, or at least one of the power supply unit 2 and the signal access unit 1 is in the unconnected state, and accurately control the power supply unit 2 to ensure the video signal access effect.

[0067] Based on the above embodiments, Figure 4 A schematic diagram of the structure of the third video signal access module provided in the embodiment of the present application is given, and the video signal access module can be further configured on the basis of the above-mentioned video signal access module. The video signal access module provided in this solution includes a signal access unit 1, a power supply unit 2, a connection detection unit 3 and a control unit 4. The power supply unit 2 provided in this solution can be configured as multiple, and the number of connection detection units 3 is consistent with the number of power supply units 2. Figure 4 In the description, two power supply units 2, a connection detection unit 3, and one signal access unit 1 are set as an example.

[0068] Among them, the first input end of each connection detection unit 3 is connected to the signal access unit 1 (for example, the first input end of each connection detection unit 3 is commonly connected to the HDMI_5V pin of the signal access unit 1), and the second input end of each connection detection unit 3 is respectively connected to a power supply unit 2.

[0069] The connection detection unit 3 provided in the present solution is used to perform interface connection detection on the signal access unit 1 and the connected power supply unit 2, and send the interface connection detection result to the control unit 4. For example, for a connection detection unit 3, when the signal access unit 1 is connected to the video output port of the external device, and the connected power supply unit 2 is connected to the power supply input terminal of the external device, an interface connection detection result indicating that the power supply unit 2 and the signal access unit 1 are both in the connected state is output, and when the signal access unit 1 is not connected to the video output port of the external device, and / or the connected power supply unit 2 is not connected to the power supply input terminal of the external device, an interface connection detection result indicating that at least one of the power supply unit 2 and the signal access unit 1 is in the unconnected state is output, and the output of the connection detection unit 3 is not affected by the connection state of other power supply units 2, and the connection state of the connected power supply unit 2 can be accurately determined. Optionally, the interface connection detection result indicating that at least one of the power supply unit 2 and the signal access unit 1 is in the unconnected state can be defined as a first interface connection detection result, and the interface connection detection result indicating that at least one of the power supply unit 2 and the signal access unit 1 is in the unconnected state can be defined as a second interface connection detection result.

[0070] The control unit 4 is used to maintain the external power supply of the power supply unit 2 corresponding to the first interface connection detection result when there is a first interface connection detection result indicating that the power supply unit 2 and the signal access unit 1 are both in a connected state. For the power supply unit 2 corresponding to the second interface connection detection result indicating that at least one of the power supply unit 2 and the signal access unit 1 is in a disconnected state, there is no restriction on maintaining power supply or cutting off power.

[0071] Optionally, the output ends of different connection detection units 3 are respectively connected to a data interface (for example, a GPIO interface) of the control unit 4. The control unit 4 can determine the corresponding power supply unit 2 based on the interface connection detection results received by different data interfaces, and control the power supply of the corresponding power supply unit 2 based on the interface connection detection results.

[0072] As described above, the video output port of the external device is connected through the signal access unit 1, and the power supply input terminal of the external device is connected through the power supply unit 2. At the same time, the signal access unit 1 and the power supply unit 2 are detected by the connection detection unit 3, and the interface connection detection result is sent to the control unit 4. The control unit 4 can maintain the external power supply of the power supply unit 2 when the interface connection detection result shows that the power supply unit 2 and the signal access unit 1 are both in the connected state, effectively reducing the situation where the power supply unit 2 fails to handshake with the video interface and cannot correctly receive the video signal due to the power-off and power-on operation of the power supply unit 2, and effectively ensuring the video signal access effect. At the same time, when there are multiple power supply units 2, the connection status of the power supply unit 2 is detected by a connection detection unit 3 respectively, and the power supply unit 2 connected to the external device can be accurately determined and the power supply of the corresponding power supply unit 2 can be maintained, effectively ensuring the video signal access effect, and realizing flexible control of video signal access under multiple power supply units 2.

[0073] The signal access unit is configured in multiple numbers, and the number of the connection detection units is consistent with the number of the signal access units, wherein:

[0074] The first input end of each of the connection detection units is connected to one of the signal access units, and the second input end of the connection detection unit is connected to the power supply unit;

[0075] The connection detection unit is used to perform interface connection detection on the connected signal access unit and the power supply unit, and send the interface connection detection result to the control unit

[0076] Based on the above embodiments, Figure 5 A schematic diagram of the structure of a fourth video signal access module provided in an embodiment of the present application is given, and the video signal access module can be further configured on the basis of the above-mentioned video signal access module. The video signal access module provided in this solution includes a signal access unit 1, a power supply unit 2, a connection detection unit 3 and a control unit 4. The signal access unit 1 provided in this solution is configured as a plurality, and the number of the connection detection units 3 is consistent with the number of the signal access units 1. Figure 5 The description is made by taking the setting of one power supply unit 2, two signal access units 1 and a connection detection unit 3 as an example.

[0077] The first input end of each connection detection unit 3 is connected to one of the signal access units 1 , and the second input end of the connection detection unit 3 is connected to the power supply unit 2 .

[0078] The connection detection unit 3 is used to perform interface connection detection on the connected signal access unit 1 and the power supply unit 2, and send the interface connection detection result to the control unit 4. For example, the video signal access module provides multiple signal access units 1 for external devices to access, and provides one power supply unit 2 to power the external device. The user can select a video output port that is connected to the external device from the multiple signal access units 1, and connect the power input end of the external device to the power supply interface. Since one power supply unit 2 is provided for power supply, when any signal access unit 1 is connected to an external device, and the power supply unit 2 is connected to an external device, the connection detection unit 3 outputs a first interface connection detection result indicating that both the power supply unit 2 and the signal access unit 1 are in a connected state, and when each signal access unit 1 is not connected to an external device, and / or the power supply unit 2 is not connected to an external device, the connection detection unit 3 outputs a second interface connection detection result indicating that the power supply unit 2 is in a non-connected state and / or each signal access unit 1 is in a non-connected state.

[0079] The control unit 4 is used to maintain the external power supply of the power supply unit 2 when the interface connection detection result shows that both the power supply unit 2 and the signal access unit 1 are in the connected state, and normal power supply to the external device can be guaranteed regardless of which signal access unit 1 the external device is connected to. When receiving the second interface connection detection result, the control unit 4 may not restrict the power supply unit 2 from maintaining power supply or powering off.

[0080] In the above, the video output port of the external device is connected through the signal access unit 1, and the power supply input end of the external device is connected through the power supply unit 2. At the same time, the signal access unit 1 and the power supply unit 2 are detected by the connection detection unit 3, and the interface connection detection result is sent to the control unit 4. The control unit 4 can maintain the external power supply of the power supply unit 2 when the interface connection detection result shows that the power supply unit 2 and the signal access unit 1 are both in the connected state, effectively reducing the situation where the power supply unit 2 fails to handshake with the video interface and cannot correctly receive the video signal due to the power-off and power-on operation of the power supply unit 2, and effectively ensuring the video signal access effect. At the same time, when there are multiple signal access units 1, the connection status of the power supply unit 2 is detected by multiple connection detection units 3, and the connection status of the connected signal access unit 1 is detected by each connection detection unit 3, respectively, so that the state of the power supply unit 2 and each signal access unit 1 being connected to the external device at the same time can be accurately determined, and the power supply of the corresponding power supply unit 2 can be accurately maintained, effectively ensuring the video signal access effect, and realizing flexible control of video signal access under multiple signal access units 1.

[0081] Based on the above embodiments, Figure 6A schematic diagram of the structure of the fifth video signal access module provided in an embodiment of the present application is given, and the video signal access module can be further configured on the basis of the above-mentioned video signal access module. The video signal access module provided in this solution includes a signal access unit 1, a power supply unit 2, a connection detection unit 3 and a control unit 4. The signal access unit 1 provided in this solution is configured as a plurality, and the number of the connection detection units 3 is consistent with the number of the signal access units 1. Figure 6 The description is made by taking the setting of one power supply unit 2, two signal access units 1 and a connection detection unit 3 as an example.

[0082] The first input end of each connection detection unit 3 is connected to a signal access unit 1 , and the second input end of each connection detection unit 3 is connected to the power supply unit 2 .

[0083] The connection detection unit 3 provided in the present solution is used to perform interface connection detection on the connected signal access unit 1 and the power supply unit 2, and send the interface connection detection result to the control unit 4. For example, the video signal access module provides multiple signal access units 1 for external devices to access, and provides one power supply unit 2 to power the external device. The user can select a video output port connected to the external device from the multiple signal access units 1, and connect the power input end of the external device to the power supply interface. Since one power supply unit 2 is provided for power supply, when any signal access unit 1 is connected to an external device, and the power supply unit 2 is connected to an external device, the connection detection unit 3 connected to the signal access unit 1 outputs a first interface connection detection result indicating that the power supply unit 2 and the corresponding signal access unit 1 are both in the connected state, and when the signal access unit 1 connected to the connection detection unit 3 is not connected to the external device, and / or the power supply unit 2 is not connected to the external device, the connection detection unit 3 outputs a second interface connection detection result indicating that the power supply unit 2 is in the unconnected state and / or the corresponding signal access units 1 are both in the unconnected state. Optionally, the output ends of different connection detection units 3 are respectively connected to a data interface (for example, a GPIO interface) of the control unit 4. The control unit 4 can determine the corresponding signal access unit 1 based on the interface connection detection results received by different data interfaces, and control the power supply of the power supply unit 2 based on the interface connection detection results.

[0084] The control unit 4 is used to maintain the external power supply of the power supply unit 2 corresponding to the first interface connection detection result when there is a first interface connection detection result that both the power supply unit 2 and the signal access unit 1 are in the connected state, so that normal power supply to the external device can be guaranteed regardless of which signal access unit 1 the external device is connected to. When receiving the second interface connection detection result, the control unit 4 does not restrict the power supply unit 2 from maintaining power supply or powering off.

[0085] As described above, the video output port of the external device is connected through the signal access unit 1, and the power supply input terminal of the external device is connected through the power supply unit 2. At the same time, the signal access unit 1 and the power supply unit 2 are detected by the connection detection unit 3, and the interface connection detection result is sent to the control unit 4. The control unit 4 can maintain the external power supply of the power supply unit 2 when the interface connection detection result shows that the power supply unit 2 and the signal access unit 1 are both in the connected state, effectively reducing the situation where the power supply unit 2 fails to handshake with the video interface and cannot correctly receive the video signal due to the power-off and power-on operation of the power supply unit 2, and effectively ensuring the video signal access effect. At the same time, when there are multiple signal access units 1, the connection status of the power supply unit 2 is detected by multiple connection detection units 3 respectively, and the connection status of the connected signal access unit 1 is detected by each connection detection unit 3 respectively, so that the connection status of the power supply unit 2 and each signal access unit 1 can be accurately determined, and the power supply control of the power supply unit 2 can be accurately determined, effectively ensuring the video signal access effect, and realizing flexible control of video signal access under multiple signal access units 1.

[0086] Based on the above embodiments, Figure 7 A structural schematic diagram of the sixth video signal access module provided in an embodiment of the present application is given, and the video signal access module can be further configured on the basis of the above-mentioned video signal access module. The video signal access module provided in this scheme includes a signal access unit 1, a power supply unit 2, a connection detection unit 3 and a control unit 4. The signal access unit 1 and the power supply unit 2 provided in this scheme are both configured in multiples, and the number of connection detection units 3 is consistent with the product of the number of signal access units 1 and power supply units 2. The figure describes the example in which the signal access unit 1 and the power supply unit 2 are both set to 2 and the connection detection unit 3 is set to 4.

[0087] The first input end of each connection detection unit 3 is respectively connected to a signal access unit 1, and the second input end of each connection detection unit 3 is respectively connected to a power supply unit 2. The user can select the signal access unit 1 connected to the video output port of the external device and the power supply unit 2 connected to the power supply input end of the external device according to the needs, and the connection of the external device is more flexible.

[0088] The connection detection unit 3 provided in the present solution is used to perform interface connection detection on the connected signal access unit 1 and the connected power supply unit 2, and send the interface connection detection result to the control unit 4, that is, one connection detection unit 3 can simultaneously detect the connection status of a combination of a signal access unit 1 and a power supply unit 2. For one connection detection unit 3, when the connected signal access unit 1 is connected to the video output port of the external device, and the connected power supply unit 2 is connected to the power supply input terminal of the external device, a first interface connection detection result indicating that the connected power supply unit 2 and the signal access unit 1 are both in the connected state is output, and when the connected signal access unit 1 is not connected to the video output port of the external device, and / or the connected power supply unit 2 is not connected to the power supply input terminal of the external device, a second interface connection detection result indicating that the connected signal access unit 1 is in the unconnected state, and / or the connected power supply unit 2 is in the unconnected state is output. For example, when any signal access unit 1 is connected to the video output port of an external device and any power supply unit 2 is connected to the power supply input terminal of the external device, the connection detection unit 3 to which the signal access unit 1 and the connection detection unit 3 are connected will output a first interface connection detection result indicating that the power supply unit 2 and the signal access unit 1 are both in a connected state, and will maintain the external power supply of the power supply unit 2 at the power supply input terminal to which the connection detection unit 3 is connected.

[0089] Optionally, the output ends of different connection detection units 3 are respectively connected to a data interface (for example, a GPIO interface) of the control unit 4. The control unit 4 can determine the corresponding power supply unit 2 based on the interface connection detection results received by different data interfaces, and control the power supply of the corresponding power supply unit 2 based on the interface connection detection results.

[0090] The control unit 4 is used to maintain the external power supply of the power supply unit 2 corresponding to the first interface connection detection result when there is a first interface connection detection result in which both the power supply unit 2 and the signal access unit 1 are in the connected state. For the power supply unit 2 corresponding to the second interface connection detection result, the restriction on maintaining power supply or powering off may not be performed.

[0091] In the above, the video output port of the external device is connected through the signal access unit 1, and the power supply input end of the external device is connected through the power supply unit 2. At the same time, the signal access unit 1 and the power supply unit 2 are detected by the connection detection unit 3, and the interface connection detection result is sent to the control unit 4. The control unit 4 can maintain the external power supply of the power supply unit 2 when the interface connection detection result shows that the power supply unit 2 and the signal access unit 1 are both in the connected state, effectively reducing the situation where the power supply unit 2 fails to handshake with the video interface and cannot correctly receive the video signal due to the power-off and power-on operation of the power supply unit 2, and effectively ensuring the video signal access effect. At the same time, when there are multiple signal access units 1 and signal access units 1, the connection status of the power supply unit 2 and the signal access unit 1 is detected by multiple connection detection units 3 respectively, the connection status of the power supply unit 2 and each signal access unit 1 can be accurately determined, and the power supply control of the power supply unit 2 can be accurately determined, effectively ensuring the video signal access effect, and realizing flexible control of video signal access under multiple signal access units 1 and multiple power supply units 2.

[0092] like Figure 8 As shown, an embodiment of the present application further provides a display device, which includes a video signal access module as provided in any of the above embodiments. The display device can connect to a video output port of an external device through a signal access unit provided by the video signal access module to send external data provided by the external device to the control unit; connect to a power supply input terminal of an external device through a power supply unit provided by the video signal access module to supply power to the external device; and perform interface connection detection on the signal access unit and the power supply unit through a connection detection unit provided by the video signal access module, and send the interface connection detection result to the control unit.

[0093] In the above, the video output port of the external device is connected through the signal access unit, and the power supply input terminal of the external device is connected through the power supply unit. At the same time, the signal access unit and the power supply unit are detected by the connection detection unit and the interface connection detection result is sent to the control unit. The control unit can maintain the external power supply of the power supply unit when the interface connection detection result shows that the power supply unit and the signal access unit are both in the connected state, effectively reducing the operation of powering off and then powering on the power supply unit, which causes the handshake with the video interface to fail, and the video signal cannot be received correctly, thereby effectively ensuring the video signal access effect.

[0094] The above are only preferred embodiments of the present application and the technical principles used. The present application is not limited to the specific embodiments provided herein, and various obvious changes, readjustments and substitutions that can be made by those skilled in the art will not deviate from the scope of protection of the present application. Therefore, although the present application is described in more detail through the above embodiments, the present application is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the claims.

Claims

1. A video signal access module, characterized in that: It includes a signal access unit, a power supply unit, a connection detection unit and a control unit, wherein: The signal access unit is connected to the control unit and is used to connect to a video output port of an external device so as to send external data provided by the external device to the control unit; The power supply unit is connected to the control unit and is used to access the power supply input terminal of the external device to supply power to the external device; The connection detection unit is connected to the signal access unit, the power supply unit and the control unit, and is used to perform interface connection detection on the signal access unit and the power supply unit, and send the interface connection detection result to the control unit; The control unit is used for maintaining the external power supply of the power supply unit when the interface connection detection result is that the power supply unit and the signal access unit are both in the connected state.

2. The video signal access module according to claim 1, characterized in that: The connection detection unit comprises an AND gate circuit, a first input end of the AND gate circuit is connected to the signal access unit, a second input end of the AND gate circuit is connected to the power supply unit, and an output end of the AND gate circuit is connected to the control unit.

3. The video signal access module according to claim 2, characterized in that: The first input end of the AND gate circuit is connected to the power pin of the signal access unit.

4. The video signal access module according to claim 2, characterized in that: The second input terminal of the AND gate circuit is connected to the power pin of the power supply unit.

5. The video signal access module according to claim 1, characterized in that: The signal access unit is an HDMI access unit and / or a DP access unit, and / or the power supply unit is a USB power supply unit.

6. The video signal access module according to claim 1, characterized in that: The power supply unit is configured in plurality, and the number of the connection detection units is consistent with the number of the power supply units, wherein: The first input end of each of the connection detection units is connected to the signal access unit, and the second input end of each of the connection detection units is connected to one of the power supply units respectively; The connection detection unit is used to perform interface connection detection on the signal access unit and the connected power supply unit, and send the interface connection detection result to the control unit; The control unit is used to maintain external power supply of the power supply unit corresponding to the first interface connection detection result when there is a first interface connection detection result that the power supply unit and the signal access unit are both in the connected state.

7. The video signal access module according to claim 1, characterized in that: The signal access unit is configured in multiple numbers, and the number of the connection detection units is consistent with the number of the signal access units, wherein: The first input end of each of the connection detection units is connected to one of the signal access units, and the second input end of the connection detection unit is connected to the power supply unit; The connection detection unit is used to perform interface connection detection on the connected signal access unit and the power supply unit, and send the interface connection detection result to the control unit.

8. The video signal access module according to claim 1, characterized in that: The signal access unit is configured in multiple numbers, and the number of the connection detection units is consistent with the number of the signal access units, wherein: The first input end of each of the connection detection units is connected to one of the signal access units, and the second input end of each of the connection detection units is connected to the power supply unit; The connection detection unit is used to perform interface connection detection on the connected signal access unit and the power supply unit, and send the interface connection detection result to the control unit; The control unit is used to maintain external power supply of the power supply unit corresponding to the first interface connection detection result when there is a first interface connection detection result that the power supply unit and the signal access unit are both in the connected state.

9. The video signal access module according to claim 1, characterized in that: The signal access unit and the power supply unit are both configured in plurality, and the number of the connection detection units is consistent with the product of the number of the signal access units and the power supply units, wherein: The first input end of each of the connection detection units is connected to one of the signal access units, and the second input end of each of the connection detection units is connected to one of the power supply units. The connection detection unit is used to perform interface connection detection on the connected signal access unit and the connected power supply unit, and send the interface connection detection result to the control unit; The control unit is used to maintain external power supply of the power supply unit corresponding to the first interface connection detection result when there is a first interface connection detection result that the power supply unit and the signal access unit are both in the connected state.

10. A display device, characterized in that: It comprises a video signal access module as described in any one of claims 1-9.

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