Multi-interface display circuit, control method and display device

Abstract

The present application provides a multi-interface display circuit, a control method and a display device, wherein the multi-interface display circuit includes: when an internal power supply is used and the first interface module is connected to the first smart device and / or the second interface module is connected to the second smart device, the internal power supply supplies power to the first smart device and / or the second smart device; when the internal power supply is not used, the first interface module is connected to the first smart device and the second interface module is connected to the second power adapter, the second power adapter supplies power to the first smart device. The multi-interface display circuit of the present application is powered by the internal power supply when the internal power supply is used; and is powered by the power adapter when the internal power supply is not used, thereby extending the working time of the display device and the smart device. When multiple smart devices enter the video data transmission mode, the video information of a certain smart device can also be selected for display through an external selection signal, thereby avoiding the occurrence of system confusion.

Description

Technical Field

[0001] The present application belongs to the field of interface technology, and in particular relates to a multi-interface display circuit, a control method, and a display device. Background Art

[0002] With the development of society, most smart devices (such as mobile phones or computers, etc.) have video transmission and power transmission functions. At the same time, in order to better display video information, smart devices are often connected to display devices through USB-C interfaces.

[0003] When two or more smart devices are connected to a display device and the display device lacks an external power source, at least one smart device typically provides power to the display device. Furthermore, because most existing smart devices only have a single USB-C port, they lack an external power source when connected to a display device. This results in continuous power consumption on the smart device, preventing the smart device and the display device from functioning for extended periods of time. Furthermore, if two or more smart devices connected to a display device are both in video data transmission mode, the display device may experience system confusion, preventing proper video and power transmission. Summary of the Invention

[0004] The purpose of this application is to provide a multi-interface display circuit, a control method and a display device, aiming to solve the problem that traditional display devices have short working time and may cause system confusion.

[0005] To achieve the above objectives, in a first aspect, an embodiment of the present application provides a multi-interface display circuit, including a first interface module, a second interface module, a power control module, and a video control module;

[0006] The power control module is electrically connected to the first interface module, the second interface module and the video control module respectively, and the video control module is also electrically connected to the first interface module and the second interface module;

[0007] The first interface module is configured to connect to a first smart device or a first power adapter;

[0008] The second interface module is configured to connect to a second smart device or a second power adapter;

[0009] The power control module is configured such that when an internal power supply is used and the first interface module is connected to the first smart device and / or the second interface module is connected to the second smart device, the internal power supply supplies power to the first smart device and / or the second smart device; when an internal power supply is used and the first interface module is connected to the first power adapter and / or the second interface module is connected to the second power adapter, the first power adapter or the second power adapter supplies power to the internal power supply;

[0010] When the internal power supply is not used, the first interface module is connected to the first smart device and the second interface module is connected to the second power adapter, the second power adapter supplies power to the first smart device; when the internal power supply is not used, the second interface module is connected to the second smart device and the first interface module is connected to the first power adapter, the first power adapter supplies power to the second smart device;

[0011] The video control module is configured to select and display the video information of the first smart device or the video information of the second smart device according to an external selection signal when the first interface module is connected to the first smart device and / or the second interface module is connected to the second smart device.

[0012] In another possible implementation manner of the first aspect, the first interface module includes a first interface and a first switch;

[0013] The first interface is electrically connected to the first switch, the power control module and the video control module respectively, and the first switch is also electrically connected to the power control module;

[0014] The first interface is configured to connect to the first smart device or the first power adapter;

[0015] The first switch is configured to turn on the power control module to supply power to the first smart device, or turn on the first power adapter to supply power to the power control module according to a first switch control signal.

[0016] In another possible implementation manner of the first aspect, the second interface module includes a second interface and a second switch;

[0017] The second interface is electrically connected to the second switch, the power control module and the video control module respectively, and the second switch is also electrically connected to the power control module;

[0018] The second interface is configured to connect to the second smart device or the second power adapter;

[0019] The second switch is configured to turn on the power control module to supply power to the second smart device, or turn on the second power adapter to supply power to the power control module according to a second switch control signal.

[0020] In another possible implementation manner of the first aspect, the power control module includes a charge and discharge control unit, a battery power source, a third switch, and a fourth switch;

[0021] The charge and discharge control unit is electrically connected to the battery power supply, the third switch, and the fourth switch, respectively. The third switch is also electrically connected to the first interface module and the battery power supply, respectively. The fourth switch is also electrically connected to the second interface module and the battery power supply, respectively.

[0022] The charge and discharge control unit is configured to output a third switch control signal when the first interface module is connected to the first power adapter, or to output a fourth switch control signal when the second interface module is connected to the second power adapter;

[0023] The battery power supply is configured to receive power from the first power adapter or the second power adapter, or to supply power to the first smart device or the second smart device;

[0024] the third switch being configured to control the first power adapter to supply power to the battery power source according to the third switch control signal;

[0025] The fourth switch is configured to control the second power adapter to supply power to the battery power source according to the fourth switch control signal.

[0026] In another possible implementation of the first aspect, the video control module includes a video control unit and a strobe switch;

[0027] The video control unit is electrically connected to the strobe switch, the first interface module and the second interface module respectively;

[0028] The video control unit is configured to receive a first display signal sent by the first smart device or a second display signal sent by the second smart device and send the signal to the power control module;

[0029] The power control module is configured to generate a first video strobe signal according to the first display signal, or to generate a second video strobe signal according to the second display signal;

[0030] The selection switch is configured to display the video information of the first smart device according to the first video selection signal, or to display the video information of the second smart device according to the second video selection signal.

[0031] In a second aspect, an embodiment of the present application provides a method for controlling a multi-interface display circuit, comprising the following steps:

[0032] When an internal power supply is used and the first interface module is connected to the first smart device and / or the second interface module is connected to the second smart device, the internal power supply supplies power to the first smart device and / or the second smart device, and selects to display the video information of the first smart device or the video information of the second smart device according to an external selection signal;

[0033] When an internal power supply is used and the first interface module is connected to the first power adapter and / or the second interface module is connected to the second power adapter, the first power adapter or the second power adapter supplies power to the internal power supply;

[0034] When the internal power supply is not used, the first interface module is connected to the first smart device and the second interface module is connected to the second power adapter, the second power adapter supplies power to the first smart device and displays the video information of the first smart device;

[0035] When the internal power supply is not used, the second interface module is connected to the second smart device and the first interface module is connected to the first power adapter, the first power adapter supplies power to the second smart device and displays the video information of the second smart device.

[0036] In another possible implementation manner of the second aspect, the preset current range includes a plurality of ranges, and the external dimming signal corresponds one-to-one to the preset current ranges.

[0037] In another possible implementation of the second aspect, the following steps are further included:

[0038] When an internal power supply is used, the first interface module is connected to the first power adapter, and the second interface module is connected to the second power adapter, a power adapter with greater power is selected to supply power to the internal power supply.

[0039] In another possible implementation of the second aspect, the following steps are further included:

[0040] When the internal power supply is not used and the first interface module is connected to the first intelligent device, the second interface module is set as an uplink port;

[0041] When the internal power supply is not used and the second interface module is connected to the second intelligent device, the first interface module is set as an uplink port.

[0042] In another possible implementation of the second aspect, the following steps are further included:

[0043] When the internal power supply is not used and the first interface module is connected to the first power adapter, the second interface module is set as a downstream port;

[0044] When the internal power supply is not used and the second interface module is connected to the second power adapter, the first interface module is set as a downstream port.

[0045] In a third aspect, an embodiment of the present application provides a display device comprising the multi-interface display circuit.

[0046] Compared with the prior art, the embodiments of the present application have the following advantages: the multi-interface display circuit described above includes an internal power supply. When the internal power supply is used, power is supplied to the display device and the smart device via the internal power supply; when the internal power supply is not used, power is supplied to the display device and the smart device via a power adapter, thereby extending the operating time of the display device and the smart device. Furthermore, when multiple smart devices are in video data transmission mode, an external selection signal can be used to select a specific smart device for display, thereby avoiding system confusion. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0048] Figure 1 A schematic diagram of a first structure of a multi-interface display circuit provided in an embodiment of the present application;

[0049] Figure 2 A second structural diagram of the multi-interface display circuit provided in an embodiment of the present application;

[0050] Figure 3 A first flow chart of a method for controlling a multi-interface display circuit according to an embodiment of the present application;

[0051] Figure 4 A second flow chart of the control method of the multi-interface display circuit provided in an embodiment of the present application;

[0052] Figure 5 This is a third flow chart of the control method of the multi-interface display circuit provided in an embodiment of the present application.

[0053] Description of Reference Numerals

[0054] 11-first interface module, 111-first interface, 112-first switch, 12-second interface module, 121-second interface, 122-second switch, 13-power control module, 131-charge and discharge control unit, 132-battery power supply, 133-third switch, 134-fourth switch, 14-video control module, 141-video control unit, 142-select switch. DETAILED DESCRIPTION

[0055] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0056] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0057] When holding a multi-person meeting in the wild, there are often multiple people who need to display their speeches (such as PPT or WORD, etc.) on the display device, so there will be a situation where two or more smart devices (such as mobile phones or computers) are connected to the display device in advance and there is no external power supply. Because most existing smart devices only have one USB-C interface, there is no external power supply after connecting to the display device. The smart device needs to continuously supply power to the smart device itself and the display device, which causes both the smart device and the display device to be unable to work for a long time. At the same time, when two or more smart devices connected to the display device enter the video data transmission mode, the display device may experience system confusion and be unable to obtain the real video information, which causes the display device to be unable to perform the video transmission function and power transmission function normally.

[0058] To this end, the present application provides a multi-interface display circuit. An internal power supply is provided within the multi-interface display circuit. When the internal power supply is used, power is supplied to the display device and smart device via the internal power supply. When the internal power supply is not used, power is supplied to the display device and smart device via a power adapter, thereby extending the operating time of the display device and smart device. Furthermore, when multiple smart devices are in video data transmission mode, an external selection signal can be used to select the video information of a specific smart device for display, thereby avoiding system confusion.

[0059] The multi-interface display circuit provided in this application is described below with reference to the accompanying drawings.

[0060] Figure 1 This is a schematic diagram of the first structure of the multi-interface display circuit provided in the embodiment of the present application. Figure 1 As shown, a multi-interface display circuit 10 exemplarily includes a first interface module 11, a second interface module 12, a power control module 13, and a video control module 14. The power control module 13 is electrically connected to the first interface module 11, the second interface module 12, and the video control module 14, respectively. The video control module 14 is also electrically connected to the first interface module 11 and the second interface module 12. The first interface module 11 is configured to connect to a first smart device or a first power adapter; the second interface module 12 is configured to connect to a second smart device or a second power adapter.

[0061] The power control module 13 is configured such that when an internal power supply is used and the first interface module 11 is connected to the first smart device and / or the second interface module 12 is connected to the second smart device, the internal power supply supplies power to the first smart device and / or the second smart device; when an internal power supply is used and the first interface module 11 is connected to the first power adapter and / or the second interface module 12 is connected to the second power adapter, the first power adapter or the second power adapter supplies power to the internal power; when an internal power supply is not used, the first interface module 11 is connected to the first smart device and the second interface module 12 is connected to the second power adapter, the second power adapter supplies power to the first smart device; when an internal power supply is not used, the second interface module 12 is connected to the second smart device and the first interface module 11 is connected to the first power adapter, the first power adapter supplies power to the second smart device.

[0062] The video control module 14 is configured to select and display the video information of the first smart device or the video information of the second smart device according to an external selection signal when the first interface module 11 is connected to the first smart device and / or the second interface module 12 is connected to the second smart device.

[0063] In the embodiments of the present application, there may be the following situations, specifically:

[0064] When the multi-interface display circuit 10 is powered by an internal power supply and any interface module (i.e., the first interface module 11 or the second interface module 12) is connected to a smart device (corresponding to the first smart device or the second smart device), the internal power supply supplies power to the smart device and displays the video information of the smart device through the video control module 14. When another interface module is connected to a smart device, the video control module 14 selects the video information of a specific smart device to display based on an external selection signal; when another interface module is connected to a power adapter, the power adapter supplies power to the internal power supply and the smart device.

[0065] When the multi-interface display circuit 10 is powered by an internal power supply and any interface module (i.e., the first interface module 11 or the second interface module 12) is connected to a power adapter (corresponding to the first power adapter or the second power adapter), the power adapter supplies power to the internal power supply. When another interface module is connected to a smart device, the power adapter supplies power to the internal power supply and the smart device, and displays the video information of the smart device through the video control module 14. When another interface module is connected to a power adapter, the power adapter with higher power is selected to supply power to the internal power supply.

[0066] When the multi-interface display circuit 10 is not powered by an internal power supply and either interface module (i.e., the first interface module 11 or the second interface module 12) is connected to a smart device (corresponding to the first smart device or the second smart device), the other interface module is set as an uplink port, and the video information of the smart device is displayed through the video control module 14. When the other interface module is connected to a power adapter, the power adapter supplies power to the smart device; when the other interface module is connected to a smart device, the request is ignored.

[0067] When the multi-interface display circuit 10 is not powered by an internal power supply and any interface module (i.e., the first interface module 11 or the second interface module 12) is connected to a power adapter (corresponding to the first power adapter or the second power adapter), the other interface module is set as a downstream port. When the other interface module is connected to a smart device, power is supplied to the smart device through the power adapter, and the video information of the smart device is displayed through the video control module 14; when the other interface module is connected to a power adapter, the request is ignored. This allows the display device and the smart device to draw power from both the internal power supply of the multi-interface display circuit 10 and the power adapter, extending the working time of the display device and the smart device. When both smart devices enter the video data transmission mode, the video information of a smart device can also be selected for display through an external selection signal, thereby avoiding system confusion.

[0068] Figure 2 This is a second structural diagram of the multi-interface display circuit provided in the embodiment of the present application. Figure 2 As shown, exemplarily, the first interface module 11 includes a first interface 111 and a first switch 112 ; the first interface 111 is electrically connected to the first switch 112 , the power control module 13 and the video control module 14 respectively, and the first switch 112 is also electrically connected to the power control module 13 .

[0069] The first interface 111 is configured to connect to a first smart device or a first power adapter.

[0070] The first switch 112 is configured to switch on the power control module 13 to supply power to the first smart device according to a first switch control signal, or to supply power to the power control module 13 through a first power adapter.

[0071] In the embodiment of the present application, the first interface 111 is used to connect to a first smart device or a first power adapter. When the first interface 111 is connected to the first smart device, the first switch 112 is used to connect the power control module 13 to supply power to the first smart device according to the first switch control signal of the power control module 13. When the first interface 111 is connected to the first power adapter, the first switch 112 is used to connect the first power adapter to supply power to the power control module 13.

[0072] For example, Figure 2 As shown, the second interface module 12 includes a second interface 121 and a second switch 122 ; the second interface 121 is electrically connected to the second switch 122 , the power control module 13 and the video control module 14 respectively, and the second switch 122 is also electrically connected to the power control module 13 .

[0073] The second interface 121 is configured to connect to a second smart device or a second power adapter.

[0074] The second switch 122 is configured to switch on the power control module 13 to supply power to the second smart device, or switch on the second power adapter to supply power to the power control module 13 according to the second switch control signal.

[0075] In this embodiment of the present application, the second interface 121 is used to connect to a second smart device or a second power adapter. When the second interface 121 is connected to the second smart device, the second switch 122 is used to connect the power control module 13 to supply power to the second smart device according to the second switch control signal of the power control module 13. When the second interface 121 is connected to the second power adapter, the second switch 122 is used to connect the second power adapter to supply power to the power control module 13.

[0076] For example, Figure 2 As shown, the power control module 13 includes a charge and discharge control unit 131, a battery power supply 132, a third switch 133 and a fourth switch 134; the charge and discharge control unit 131 is electrically connected to the battery power supply 132, the third switch 133 and the fourth switch 134 respectively, the third switch 133 is also electrically connected to the first interface module 11 and the battery power supply 132 respectively, and the fourth switch 134 is also electrically connected to the second interface module 12 and the battery power supply 132 respectively.

[0077] The charge and discharge control unit 131 is configured to output a third switch control signal when the first interface module 11 is connected to the first power adapter, or to output a fourth switch control signal when the second interface module 12 is connected to the second power adapter.

[0078] The battery power supply 132 is configured to receive power from the first power adapter or the second power adapter, or to supply power to the first smart device or the second smart device.

[0079] The third switch 133 is configured to control the first power adapter to supply power to the battery power source 132 according to a third switch control signal.

[0080] The fourth switch 134 is configured to control the second power adapter to supply power to the battery power source 132 according to a fourth switch control signal.

[0081] In this embodiment of the present application, the charge and discharge control unit 131 is configured to output a third switch control signal when the first interface module 11 is connected to a first power adapter, and the third switch 133 is configured to control the first power adapter to supply power to the battery power source 132 according to the third switch control signal. The charge and discharge control unit 131 is further configured to output a fourth switch control signal when the second interface module 12 is connected to a second power adapter, and the fourth switch 134 is configured to control the second power adapter to supply power to the battery power source 132 according to the fourth switch control signal.

[0082] The charge-discharge control unit 131 is further configured to select the adapter with higher power and output a corresponding third switch control signal or a corresponding fourth switch control signal when the first interface module 11 is connected to a first power adapter and when the second interface module 12 is connected to a second power adapter. The charge-discharge control unit 131 may include a USB power delivery (PD) protocol chip and a charging chip. The USB power delivery protocol chip is configured to control the on and off of the third switch 133 and the fourth switch 134 to control the first power adapter or the second power adapter to supply power to the battery power supply 132. The charging chip is configured to control the battery power supply 132 to supply power to the system power supply.

[0083] For example, Figure 2 As shown, the video control module 14 includes a video control unit 141 and a strobe switch 142 ; the video control unit 141 is electrically connected to the strobe switch 142 , the first interface module 11 and the second interface module 12 , respectively.

[0084] The video control unit 141 is configured to receive a first display signal sent by the first smart device or a second display signal sent by the second smart device and send the signal to the power control module 13 .

[0085] The power control module 13 is configured to generate a first video selection signal according to the first display signal, or generate a second video selection signal according to the second display signal.

[0086] The selection switch 142 is configured to display the video information of the first smart device according to the first video selection signal, or to display the video information of the second smart device according to the second video selection signal.

[0087] In an embodiment of the present application, the video control unit 141 is used to receive a first display signal sent by a first smart device or a second display signal sent by a second smart device and send it to the power control module 13. The power control module 13 is used to generate a first video selection signal based on the first display signal, or to generate a second video selection signal based on the second display signal; at the same time, when the power control module 13 receives the first display signal and the second display signal at the same time, it can select to output the first video selection signal or the second video selection signal according to the external selection signal. The selection switch 142 is used to display the video information of the first smart device according to the first video selection signal, or to display the video information of the second smart device according to the second video selection signal. As a result, the multi-interface display circuit of the present application will only display the video information of one smart device, avoiding the occurrence of system confusion.

[0088] Based on the multi-interface display circuit provided by the above embodiment, the control method of the multi-interface display circuit is specifically described below.

[0089] For example, Figure 3 This is a first flow chart of the control method of the multi-interface display circuit provided in the embodiment of the present application. Figure 3 As shown, a control method for a multi-interface display circuit includes the following steps:

[0090] S301. When the power control module 13 adopts internal power supply and the first interface module 11 is connected to the first smart device and / or the second interface module 12 is connected to the second smart device, the internal power supply supplies power to the first smart device and / or the second smart device, and selects to display the video information of the first smart device or the video information of the second smart device according to the external selection signal.

[0091] S302: When the power control module 13 adopts the internal power supply and the first interface module 11 is connected to the first power adapter and / or the second interface module 12 is connected to the second power adapter, the first power adapter or the second power adapter supplies power to the internal power supply.

[0092] S303: When the internal power supply is not used, the first interface module 11 is connected to the first smart device and the second interface module 12 is connected to the second power adapter, the power control module 13 supplies power to the first smart device through the second power adapter and displays the video information of the first smart device.

[0093] S304: When the power control module 13 does not use the internal power supply, the second interface module 12 is connected to the second smart device and the first interface module 11 is connected to the first power adapter, the first power adapter supplies power to the second smart device and displays the video information of the second smart device.

[0094] In the embodiment of the present application, when the power control module 13 is powered by an internal power supply, power is supplied by the internal power supply; when the power control module 13 is not powered by an internal power supply, power is supplied by a power adapter, thereby extending the operating time of the display device and the smart device. When multiple smart devices enter the video data transmission mode, the video information of a specific smart device is selected for display through an external selection signal, thereby avoiding system confusion.

[0095] In another embodiment of the present application, the following steps are also included:

[0096] When the internal power supply is used, the first interface module 11 is connected to the first power adapter, and the second interface module 12 is connected to the second power adapter, the power adapter with greater power is selected to supply power to the internal power supply.

[0097] In an embodiment of the present application, when the power control module 13 is powered by an internal power supply and both interface modules are connected to power adapters, a power adapter with higher power can be selected to supply power to the internal power supply, thereby avoiding conflicts caused by simultaneous power supply by the power adapters.

[0098] In another embodiment of the present application, when the internal power supply is not used and the first interface module 11 is connected to the first smart device, the second interface module 12 is set as an upstream facing port (UFP).

[0099] When the internal power supply is not used and the second interface module 12 is connected to the second intelligent device, the first interface module 11 is set as an uplink port.

[0100] In this embodiment of the present application, when the power control module 13 is not powered by the internal power supply (i.e., the internal power supply is dead or disconnected) and the first interface module 11 is connected to the first smart device, the second interface module 12 is configured as an uplink port so that the second interface module 12 must be connected to a power adapter to supply power to the first smart device. That is, when the second interface module 12 is connected to a second smart device, it does not respond.

[0101] Similarly, when the power control module 13 is not powered by the internal power supply (i.e., the internal power supply is dead or disconnected) and the second interface module 12 is connected to a second smart device, the first interface module 11 is configured as an uplink port so that the first interface module 11 must be connected to a power adapter to supply power to the second smart device. That is, when the first interface module 11 is connected to the first smart device, it will not respond.

[0102] In another embodiment of the present application, the following steps are also included:

[0103] When the internal power supply is not used and the first interface module 11 is connected to the first power adapter, the second interface module 12 is set as a Downstream Facing Port (DFP).

[0104] When the internal power supply is not used and the second interface module 12 is connected to the second power adapter, the first interface module 11 is set as a downlink port.

[0105] In this embodiment of the present application, when the power control module 13 is not powered by an internal power supply and the first interface module 11 is connected to a first power adapter, the second interface module 12 is configured as a downstream port so that only a second smart device is connected to the second interface module 12, thereby enabling the first power adapter to power the second smart device. That is, when the second interface module 12 is connected to a second smart device, it does not respond.

[0106] When the power control module 13 is not powered by an internal power source and the second interface module 12 is connected to a second power adapter, the first interface module 11 is configured as a downstream port so that only the first smart device is connected to the first interface module 11, thereby enabling the second power adapter to supply power to the first smart device. That is, when the first interface module 11 is connected to the first power adapter, it does not respond.

[0107] Figure 4 This is a second flow chart of the control method of the multi-interface display circuit provided in an embodiment of the present application. Figure 5 This is a third flow chart of the control method of the multi-interface display circuit provided in the embodiment of the present application. Figure 4 and Figure 5 As shown, the control method of the multi-interface display circuit of the present application includes the following steps:

[0108] S401: Determine whether internal power is used. If yes, set both interface modules as dual-role ports (DRP), complete USB PD protocol negotiation, and proceed to S402. If no, proceed to S501.

[0109] S402: Determine whether any interface module is connected to a smart device. If so, the internal power supply supplies power to the smart device, completes USB PD protocol negotiation, and then proceeds to S403 after displaying the video information of the smart device. If not, proceed to S405.

[0110] S403: Determine whether the other interface module is connected to a smart device. If so, complete USB PD protocol negotiation, causing both smart devices to output video transmission signals, and select either the first smart device's video information or the second smart device's video information for display based on an external selection signal. Furthermore, if the smart device connected to either interface module is unplugged, the process returns to S402. If not, proceed to S404.

[0111] S404: Determine whether the other interface module is connected to a power adapter. If so, complete USB PD protocol negotiation, and the power adapter supplies power to the internal power supply and the smart device. Alternatively, if the power adapter connected to the interface module is unplugged, the process returns to S402. If the smart device connected to the interface module is unplugged, the process proceeds to S405. Otherwise, the process proceeds to S402.

[0112] S405: Determine whether any interface module is connected to a power adapter. If so, complete USB PD protocol negotiation, the power adapter supplies power to the internal power supply, and proceed to S406. If not, return to S401.

[0113] S406: Determine whether another interface module is connected to a smart device. If so, complete USB PD protocol negotiation, the power adapter supplies power to the internal power supply and the smart device, and displays the video information of the smart device. Alternatively, if the power adapter connected to the interface module is unplugged, proceed to S402. If the smart device connected to the interface module is unplugged, return to S405. Otherwise, proceed to S407.

[0114] S407: Determine whether another interface module is connected to a power adapter. If so, complete USB PD protocol negotiation and select a power adapter with higher power to supply power to the internal power supply. If the power adapter connected to any interface module is unplugged, return to S405. Otherwise, return to S405.

[0115] S501: Determine whether any interface module is connected to a smart device. If so, set the other interface module as an upstream port, complete USB PD protocol negotiation, and display the video information of the smart device. If not, proceed to S503.

[0116] S502: Determine whether another interface module is connected to a power adapter. If so, complete USB PD protocol negotiation, and the power adapter supplies power to the smart device. Alternatively, if the power adapter connected to the interface module is unplugged, the process returns to S501. If the smart device connected to the interface module is unplugged, the process proceeds to S503. Otherwise, the process returns to S501.

[0117] S503: Determine whether any interface module is connected to a power adapter. If so, set the other interface module as a downstream port, complete USB PD protocol negotiation and proceed to S504. If not, return to S401.

[0118] S504: Determine whether another interface module is connected to a smart device. If so, complete USB PD protocol negotiation, the power adapter supplies power to the internal power supply and the smart device, and displays the video information of the smart device. Alternatively, if the power adapter connected to the interface module is unplugged, proceed to S501. If the smart device connected to the interface module is unplugged, return to S503. Otherwise, return to S503.

[0119] Illustratively, an embodiment of the present application provides a display device, including a multi-interface display circuit 10 .

[0120] The multi-interface display circuit 10 of the present application is installed within a display device, which can be a display panel or screen. An internal power supply is provided within the multi-interface display circuit. When the internal power supply is in use, power is supplied to the display device and smart device via the internal power supply. When the internal power supply is not in use, power is supplied to the display device and smart device via a power adapter, thereby extending the operating time of the display device and smart device. Furthermore, when multiple smart devices are in video data transmission mode, an external selection signal can be used to select a specific smart device for display, thereby avoiding system confusion.

[0121] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0122] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In actual applications, the above-mentioned functions can be distributed and completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated into one processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of a software functional unit. In addition, the specific identification information of each functional unit and module is only for the convenience of distinguishing each other, and is not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned embodiment, and will not be repeated here.

[0123] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant description of other embodiments.

[0124] Those skilled in the art will appreciate that the units of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0125] In the embodiments provided in this application, it should be understood that the disclosed control method for a multi-interface display circuit can be implemented in other ways. For example, the control method embodiment of a multi-interface display circuit described above is merely illustrative. For example, the division of modules or units is merely a logical function division. In actual implementation, there may be other division methods, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some multi-interface systems, devices or units, which can be electrical, mechanical or other forms.

[0126] Units described as separate components may or may not be physically separate, and components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.

[0127] In addition, the functional units in the various embodiments of the present application may be integrated into a single processing unit, or each unit may exist physically separately, or two or more units may be integrated into a single unit. The aforementioned integrated units may be implemented in the form of hardware or software functional units.

[0128] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. A multi-interface display circuit, characterized in that: It includes a first interface module, a second interface module, a power control module and a video control module; The power control module is electrically connected to the first interface module, the second interface module and the video control module respectively, and the video control module is also electrically connected to the first interface module and the second interface module; The first interface module is configured to connect to a first smart device or a first power adapter; The second interface module is configured to connect to a second smart device or a second power adapter; The power control module is configured such that when an internal power supply is used and the first interface module is connected to the first smart device and / or the second interface module is connected to the second smart device, the internal power supply supplies power to the first smart device and / or the second smart device; when an internal power supply is used and the first interface module is connected to the first power adapter and / or the second interface module is connected to the second power adapter, the first power adapter or the second power adapter supplies power to the internal power supply; When the internal power supply is not used, the first interface module is connected to the first smart device and the second interface module is connected to the second power adapter, the second power adapter supplies power to the first smart device; When the internal power supply is not used, the second interface module is connected to the second smart device and the first interface module is connected to the first power adapter, the first power adapter supplies power to the second smart device; The video control module is configured to select and display the video information of the first smart device or the video information of the second smart device according to an external selection signal when the first interface module is connected to the first smart device and / or the second interface module is connected to the second smart device.

2. The circuit according to claim 1, wherein: The first interface module includes a first interface and a first switch; The first interface is electrically connected to the first switch, the power control module and the video control module respectively, and the first switch is also electrically connected to the power control module; The first interface is configured to connect to the first smart device or the first power adapter; The first switch is configured to turn on the power control module to supply power to the first smart device, or turn on the first power adapter to supply power to the power control module according to a first switch control signal.

3. The circuit according to claim 1, wherein: The second interface module includes a second interface and a second switch; The second interface is electrically connected to the second switch, the power control module and the video control module respectively, and the second switch is also electrically connected to the power control module; The second interface is configured to connect to the second smart device or the second power adapter; The second switch is configured to turn on the power control module to supply power to the second smart device, or turn on the second power adapter to supply power to the power control module according to a second switch control signal.

4. The circuit according to claim 1, wherein The power control module includes a charge and discharge control unit, a battery power supply, a third switch and a fourth switch; The charge and discharge control unit is electrically connected to the battery power supply, the third switch, and the fourth switch, respectively. The third switch is also electrically connected to the first interface module and the battery power supply, respectively. The fourth switch is also electrically connected to the second interface module and the battery power supply, respectively. The charge and discharge control unit is configured to output a third switch control signal when the first interface module is connected to the first power adapter, or to output a fourth switch control signal when the second interface module is connected to the second power adapter; The battery power supply is configured to receive power from the first power adapter or the second power adapter, or to supply power to the first smart device or the second smart device; the third switch being configured to control the first power adapter to supply power to the battery power source according to the third switch control signal; The fourth switch is configured to control the second power adapter to supply power to the battery power source according to the fourth switch control signal.

5. The circuit according to claim 1, wherein The video control module includes a video control unit and a strobe switch; The video control unit is electrically connected to the strobe switch, the first interface module and the second interface module respectively; The video control unit is configured to receive a first display signal sent by the first smart device or a second display signal sent by the second smart device and send the signal to the power control module; The power control module is configured to generate a first video strobe signal according to the first display signal, or to generate a second video strobe signal according to the second display signal; The selection switch is configured to display the video information of the first smart device according to the first video selection signal, or to display the video information of the second smart device according to the second video selection signal.

6. A control method for the multi-interface display circuit according to any one of claims 1 to 5, characterized in that: The steps include: When an internal power supply is used and the first interface module is connected to the first smart device and / or the second interface module is connected to the second smart device, the internal power supply supplies power to the first smart device and / or the second smart device, and selects to display the video information of the first smart device or the video information of the second smart device according to an external selection signal; When an internal power supply is used and the first interface module is connected to the first power adapter and / or the second interface module is connected to the second power adapter, the first power adapter or the second power adapter supplies power to the internal power supply; When the internal power supply is not used, the first interface module is connected to the first smart device and the second interface module is connected to the second power adapter, the second power adapter supplies power to the first smart device and displays the video information of the first smart device; When the internal power supply is not used, the second interface module is connected to the second smart device and the first interface module is connected to the first power adapter, the first power adapter supplies power to the second smart device and displays the video information of the second smart device.

7. The method according to claim 6, wherein The following steps are also included: When an internal power supply is used, the first interface module is connected to the first power adapter, and the second interface module is connected to the second power adapter, a power adapter with greater power is selected to supply power to the internal power supply.

8. The method according to claim 6, wherein The following steps are also included: When the internal power supply is not used and the first interface module is connected to the first intelligent device, the second interface module is set as an uplink port; When the internal power supply is not used and the second interface module is connected to the second intelligent device, the first interface module is set as an uplink port.

9. The method according to claim 6, wherein The following steps are also included: When the internal power supply is not used and the first interface module is connected to the first power adapter, the second interface module is set as a downstream port; When the internal power supply is not used and the second interface module is connected to the second power adapter, the first interface module is set as a downstream port.

10. A display device, characterized in that: The multi-interface display circuit comprises the multi-interface display circuit according to any one of claims 1 to 5.

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