Display device and digital video conversion box

Abstract

Provided in some embodiments of the present application are a display device and a digital video conversion box. The display device and the digital video conversion box each comprise: a plurality of first input ports, wherein each first input port is configured to receive a radio television signal; a first demodulation module, which has an input end and is configured to parse the radio television signal received by the input end thereof, so as to generate a first video signal; a first path selection switch, which is coupled to the plurality of first input ports and the first demodulation module and is configured to connect the selected radio television signal to the selected first demodulation module; and a main controller, which is coupled to the first demodulation module and the first path selection switch and is configured to control the display device to perform display on the basis of the first video signal. The present application can improve the intelligence of the display device.

Description

Display device and digital video converter box

[0001] This application claims priority to the Chinese Patent Application No. 202410772703.X, filed on June 14, 2024, entitled “Display device and digital video converter box”; the Chinese Patent Application No. 202411536850.3, filed on October 30, 2024, entitled “Display device”; the Chinese Patent Application No. 202411536888.0, filed on October 30, 2024, entitled “Display device”; and the Chinese Patent Application No. 202411537051.8, filed on October 30, 2024, entitled “Display device”, all of which are incorporated by reference in their entirety. TECHNICAL FIELD

[0002] The present disclosure relates to the technical field of display, and in particular, to a display device and a digital video converter box. BACKGROUND

[0003] Display devices have been widely used in various industries. Some display devices, such as televisions, usually display videos by receiving terrestrial television signals / cable signals. SUMMARY

[0004] In one aspect, a display device is provided, comprising: a plurality of first input ports configured to receive broadcast television signals; a first demodulation module having an input end and configured to parse the broadcast television signals received by the input end to generate a first video signal; a first path selection module coupled with the plurality of first input ports and the first demodulation module and configured to connect the selected broadcast television signal to the selected first demodulation module; and a main controller coupled with the first demodulation module and the first path selection switch and configured to control the display device to display based on the first video signal.

[0005] In another aspect, a digital video converter box is provided, comprising: a plurality of first input ports configured to receive broadcast television signals; a first demodulation module having an input end and configured to parse the broadcast television signals received by the input end to generate a first video signal; a first path selection module coupled with the plurality of first input ports and the first demodulation module and configured to connect the selected broadcast television signal to the selected first demodulation module; and a main controller coupled with the first demodulation module and the first path selection switch and configured to control the display device to display based on the first video signal. BRIEF DESCRIPTION OF DRAWINGS

[0006] FIG. 1 is a schematic diagram of an operating scenario between a display device and a control device according to some embodiments;

[0007] FIG. 2 illustrates a configuration block diagram of a control device according to an example embodiment;

[0008] FIG. 3 illustrates a structural schematic diagram of a display device;

[0009] FIG. 4 is a structural schematic diagram of a display device according to some embodiments of the present disclosure;

[0010] FIG. 5 is a structural schematic diagram of another display device according to some embodiments of the present disclosure;

[0011] FIG. 6 is a structural schematic diagram of yet another display device according to some embodiments of the present disclosure;

[0012] FIG. 7 is a structural schematic diagram of yet another display device according to some embodiments of the present disclosure;

[0013] FIG. 8 is a structural schematic diagram of yet another display device according to some embodiments of the present disclosure;

[0014] FIG. 9 is a structural schematic diagram of yet another display device according to some embodiments of the present disclosure;

[0015] FIG. 10 is a structural schematic diagram of yet another display device according to some embodiments of the present disclosure;

[0016] FIG. 11a is a structural schematic diagram of yet another display device according to some embodiments of the present disclosure;

[0017] FIG. 11b is a structural schematic diagram of yet another display device according to some embodiments of the present disclosure;

[0018] FIG. 11c is a structural schematic diagram of yet another display device according to some embodiments of the present disclosure;

[0019] FIG. 12a is a structural schematic diagram of yet another display device according to some embodiments of the present disclosure;

[0020] FIG. 12b is a structural schematic diagram of yet another display device according to some embodiments of the present disclosure;

[0021] FIG. 13 is a structural schematic diagram of yet another display device according to some embodiments of the present disclosure;

[0022] FIG. 14a is a structural schematic diagram of yet another display device according to some embodiments of the present disclosure;

[0023] FIG. 14b is a structural schematic diagram of yet another display device according to some embodiments of the present disclosure;

[0024] FIG. 15 is a structural schematic diagram of yet another display device according to some embodiments of the present disclosure;

[0025] FIG. 16a is a structural schematic diagram of yet another display device according to some embodiments of the present disclosure;

[0026] FIG. 16b is a structural schematic diagram of yet another display device according to some embodiments of the present disclosure;

[0027] FIG. 16c is a structural schematic diagram of yet another display device according to some embodiments of the present disclosure;

[0028] FIG. 16d is a structural schematic diagram of yet another display device according to some embodiments of the present disclosure;

[0029] FIG. 16e is a structural schematic diagram of yet another display device according to some embodiments of the present disclosure;

[0030] FIG. 17 is a structural schematic diagram of yet another display device according to some embodiments of the present disclosure;

[0031] FIG. 18 is a structural schematic diagram of yet another display device according to some embodiments of the present disclosure;

[0032] FIG. 19 is a schematic diagram of a working mode of a display device according to some embodiments of the present disclosure;

[0033] FIG. 20 is a schematic diagram of another working mode of a display device according to some embodiments of the present disclosure;

[0034] FIG. 21 is a schematic diagram of another working mode of a display device according to some embodiments of the present disclosure;

[0035] FIG. 22 is a schematic diagram of another working mode of a display device according to some embodiments of the present disclosure;

[0036] FIG. 23 is a structural schematic diagram of yet another display device according to some embodiments of the present disclosure;

[0037] FIG. 24 is a structural schematic diagram of yet another display device according to some embodiments of the present disclosure;

[0038] FIG. 25 is a structural schematic diagram of yet another display device according to some embodiments of the present disclosure;

[0039] FIG. 26 is a structural schematic diagram of yet another display device according to some embodiments of the present disclosure;

[0040] FIG. 27 is a structural schematic diagram of yet another display device according to some embodiments of the present disclosure;

[0041] FIG. 28 is a structural schematic diagram of yet another display device according to some embodiments of the present disclosure;

[0042] FIG. 29 is a structural schematic diagram of yet another display device according to some embodiments of the present disclosure;

[0043] FIG. 30 is a structural schematic diagram of yet another display device according to some embodiments of the present disclosure;

[0044] FIG. 31 is a structural schematic diagram of yet another display device according to some embodiments of the present disclosure;

[0045] FIG. 32 is a structural schematic diagram of yet another display device according to some embodiments of the present disclosure;

[0046] FIG. 33 is a structural schematic diagram of yet another display device according to some embodiments of the present disclosure. DETAILED DESCRIPTION

[0047] For the purpose of making the objects, implementations and advantages of the present disclosure more clear, the following will combine the drawings in the exemplary embodiments of the present disclosure to make a clear and complete description of the exemplary embodiments of the present disclosure. Obviously, the described exemplary embodiments are only a part of the embodiments of the present disclosure, but not all the embodiments.

[0048] It should be noted that the brief description of the terms in the present disclosure is only for the convenience of understanding the following described embodiments, and is not intended to limit the embodiments of the present disclosure. Unless otherwise specified, these terms should be understood according to their ordinary and general meanings.

[0049] In addition, the terms "include" and "have" and any variations thereof are intended to cover but not exclusive inclusion, for example, a product or device including a series of components does not have to be limited to the clearly listed components, but can include other components that are not clearly listed or inherent to these products or devices.

[0050] Noun explanation:

[0051] DVB-T (Digital Video Broadcasting-Terrestrial) is a European terrestrial digital television standard.

[0052] DVB-T2 (Digital Video Broadcasting-Terrestrial 2) is the second generation of European digital terrestrial television broadcast transmission standard.

[0053] DVB-C (Digital Video Broadcasting-Cable) is a digital cable television broadcast standard.

[0054] DVB-S (Digital Video Broadcasting-Satellite) is a digital satellite television broadcast standard, which is rapidly developed in recent years, and is a kind of broadcast television form using geosynchronous satellite to transmit digital coded compressed television signals to user end.

[0055] DVB-S2 (Digital Video Broadcasting-Satellite-second generation) is a second generation digital satellite television broadcast standard.

[0056] Unicable (a combination of Uni- and cable) is an industry standard in Europe, aiming to make satellite peripherals communicate with satellite receivers using only one coaxial cable, to simplify the installation process and reduce costs. The core principle is that the frequency point can be moved to any position of 950M-2150M, and multiple frequency points can be moved to multiple different positions of 950M-2150M, so that multiple frequency point satellite broadcast signals can be transmitted through one coaxial cable at the same time without mutual interference. Based on the Unicable standard, the equipment for realizing the above frequency point movement is called Unicable equipment.

[0057] The display device provided by the embodiments of the present disclosure can have various implementation forms, for example, can be a smart television, a laser projection device, a monitor, an electronic bulletin board, an electronic table, etc. FIG. 1 is a schematic diagram of an operation scenario between a display device and a control device according to some embodiments of the present disclosure. As shown in FIG. 1, a user can operate the display device 200 through a smart device 300 or a control device 100.

[0058] In some embodiments, the control device 100 can be a remote controller, and the communication between the remote controller and the display device can include infrared protocol communication or Bluetooth protocol communication, and other short-distance communication modes, to control the display device 200 in a wireless or wired manner. The user can input user instructions through buttons on the remote controller, voice input, control panel input, etc., to control the display device 200.

[0059] In some embodiments, the smart device 300 (such as a mobile terminal, a tablet computer, a computer, a notebook computer, etc.) can also be used to control the display device 200. For example, the display device 200 is controlled using an application program running on the smart device. In some embodiments, the display device can not receive instructions using the above-mentioned smart device or control device, but receives user control through touch or gesture, etc.

[0060] In some embodiments, the display device 200 can also be controlled in ways other than the control device 100 and the smart device 300, for example, the display device 200 can directly receive the user's voice instruction control through the voice instruction receiving module configured inside the display device 200, or the display device 200 can receive the user's voice instruction control through the voice control device configured outside the display device 200.

[0061] In some embodiments, the display device 200 also communicates data with the server 400. The display device 200 can be communicatively coupled through a local area network (LAN), a wireless local area network (WLAN), and other networks. The server 400 can provide various content and interactions to the display device 200. The server 400 can be a cluster or multiple clusters, and can include one or more types of servers.

[0062] FIG. 2 illustrates a configuration block diagram of the control device 100 according to an exemplary embodiment.

[0063] In some embodiments, as shown in FIG. 2, the control device 100 can include at least one of a controller 110, a communication interface 130, a user input / output interface 140, a memory, a power supply circuit. In some embodiments, the control device 100 can receive the user's input operation instruction, and convert the operation instruction into an instruction that the display device 200 can recognize and respond to, acting as an intermediary between the user and the display device 200.

[0064] FIG. 3 illustrates a structural schematic diagram of the display device.

[0065] In some embodiments, as shown in FIG. 3, the display device 200 can include at least one of a signal converter 210, a communicator 220, a detector 230, an external device interface 240, a controller 250, a display 260, an audio output interface 270, a memory, a power supply circuit, and a user interface.

[0066] In some embodiments, as shown in FIG. 3, the controller 250 can include at least one of a processor, such as a video processor, an audio processor, a graphics processor, a RAM, and a ROM.

[0067] In some embodiments, as shown in FIG. 3, the display 260 can include a display screen component for presenting a picture. For example, a driving component for driving an image display, a component for receiving an image signal originating from the controller output, and displaying video content, image content, and a menu control interface, and a user control UI interface. In some embodiments, as shown in FIG. 3, the display 260 can be a liquid crystal display, an OLED display, and a projection display. In other embodiments, as shown in FIG. 3, the display 260 can be a projection device and a projection screen.

[0068] In some embodiments, as shown in FIG. 3, the communicator 220 is a component for communicating with external devices or servers according to various communication protocol types. For example, the communicator can include at least one of a Wifi module, a Bluetooth module, a wired Ethernet module, other network communication protocol chips or near field communication protocol chips, and an infrared receiver. The display device 200 can establish transmission and reception of control signals and data signals with the external control device 100 or the server 400 through the communicator 220.

[0069] In some embodiments, as shown in FIG. 3, the user interface can be used to receive control signals of the control device 100 (e.g., an infrared remote controller, etc.).

[0070] In some embodiments, as shown in FIG. 3, the detector 230 can be used to collect signals of the external environment or interaction with the external environment. For example, the detector 230 can include a light receiver for collecting ambient light intensity, or an image collector such as a camera for collecting external environmental scenes, user attributes, or user interaction gestures, or a sound collector such as a microphone for receiving external sounds.

[0071] In some embodiments, the external device interface 240 can include, but is not limited to, any one or more of the following: a high-definition multimedia interface (HDMI), an analog or digital high-definition component input interface (component), a composite video input interface (CVBS), a USB input interface (USB), an RGB port, etc. It can also be a composite input / output interface formed by multiple interfaces described above.

[0072] In some embodiments, the signal converter 210 receives broadcast signals through wired or wireless reception, and demodulates audio / video signals and EPG data signals from multiple wireless or wired broadcast signals. In some embodiments, the controller 250 and the signal converter 210 can be located in different split devices, i.e., the signal converter 210 can also be in an external device of the main device where the controller 250 is located, such as an external digital video converter box, etc.

[0073] In some embodiments, the controller 250 controls the operation of the display device and responds to user operations through various software control programs stored in the memory. The controller 250 controls the overall operation of the display device 200. For example, in response to receiving a user command for selecting a UI object displayed on the display 260, the controller 250 can perform an operation related to the object selected by the user command.

[0074] In some embodiments, the controller can include at least one of a Central Processing Unit (CPU), a video processor, an audio processor, a Graphics Processing Unit (GPU), a RAM (Random Access Memory), a ROM (Read-Only Memory), a first interface to an n-th interface for input / output, a communication bus, and the like.

[0075] In some embodiments, the user can input a user command through a Graphical User Interface (GUI) displayed on the display 260, and the user input interface receives the user input command through the Graphical User Interface (GUI). In other embodiments, the user can input a user command by inputting a specific sound or gesture, and the user input interface receives the user input command by recognizing the sound or gesture through a sensor.

[0076] The "user interface" is a medium interface for interaction and information exchange between an application program or an operating system and a user, which realizes conversion between an internal form of information and a form acceptable by the user. A common form of expression of the user interface is a Graphic User Interface (GUI), which refers to a user interface related to computer operation displayed in a graphical manner. It can be an icon, a window, a control, and the like interface elements displayed in a display screen of an electronic device, wherein the control can include an icon, a button, a menu, a tab, a text box, a dialog box, a status bar, a navigation bar, a Widget, and the like visible interface elements.

[0077] In some embodiments, the display device can include a backlight assembly, wherein the backlight assembly is coupled with the power supply circuit. The backlight assembly can be configured to provide backlight to the display panel.

[0078] In some embodiments, the display device can include a main board, which can include at least one of the signal converter 210, the communicator 220, the detector 230, the external device interface 240, the controller 250, the audio output interface 270, a memory, and a user interface shown in FIG. 3.

[0079] In the related art, the display device is provided with an input port, and the terrestrial broadcast signal / cable signal is accessed through the input port. In order to improve the user experience, satellite broadcast signals are introduced in some areas. The satellite broadcast signal is a signal provided by a satellite. If a user wants to receive different types of signals, different plugs need to be manually connected to the input port, which makes the display device less intelligent and the user experience poor.

[0080] To this end, some embodiments of the present disclosure provide a display device, comprising a plurality of signal input ports, a first path selection module and a first demodulation module, the plurality of signal input ports are coupled with corresponding first demodulation modules through the first path selection module, and the first path selection module can connect the selected broadcast signal to the selected first demodulation module based on the selection of the user. In this way, when the signal is replaced, the user does not need to manually plug and unplug the signal connector, but only needs to select to realize the access of different signals, so that the embodiments can provide the intelligence of the display device, thereby improving the experience of the user.

[0081] The technical solutions of the present disclosure will be described in detail below in combination with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes can not be described in detail in some embodiments.

[0082] FIG. 4 is a structural schematic diagram of a display device according to some embodiments of the present disclosure.

[0083] In some embodiments, as shown in FIG. 4, the display device comprises a plurality of first input ports 251a configured to receive broadcast signals. Each first input port 251a receives a broadcast signal.

[0084] Among them, for the plurality of first input ports 251a, some first input ports 251a can simultaneously receive broadcast signals, or all first input ports 251a can simultaneously receive broadcast signals.

[0085] In some embodiments, the plurality of first input ports 251a can be completely identical, that is, the plurality of input ports are of uniform specifications.

[0086] In some other embodiments, the plurality of first input ports 251a can not be completely identical, so as to be suitable for the access of different signals. For example, some of the plurality of first input ports 251a can be threadedly coupled, and some others can be bayonet coupled.

[0087] In some embodiments, the broadcast signal includes a terrestrial broadcast signal, a cable signal and a satellite broadcast signal. Specifically, the terrestrial broadcast signal can include a DVB-T / T2 signal, the cable signal can include a DVB-C signal, and the satellite broadcast signal can include a DVB-S / S2 signal.

[0088] Among them, the terrestrial broadcast signal and the cable signal are similar, and both can be accessed through the first input port coupled by the bayonet, and for the convenience of description, the terrestrial broadcast signal and the cable signal are represented by DVB-T / T2 / C signal.

[0089] The ground broadcast signal / cable signal is a broadcast signal from a television station. The satellite broadcast signal is provided by a satellite, and can be a plurality of broadcast signals provided by a plurality of satellites.

[0090] It should be noted that, for the satellite broadcast signal, in the traditional standard, the signal provided by each satellite is connected to the first input port through a coaxial cable; in the new standard proposed in Europe, such as the Unicable standard, the signals provided by a plurality of satellites are connected to the frequency conversion device, which generates a satellite broadcast signal including a plurality of different frequencies based on frequency conversion of the signals provided by the plurality of satellites, and the signals of different frequencies are provided by different satellites. The frequency conversion device can be a Unicable device, or a Jess device (an upgraded version of the Unicable device), etc.

[0091] The satellite broadcast signal is connected to the first input port of the display device through a coaxial cable, and the display device identifies the signals provided by different satellites through different frequencies, that is, in the new standard, the signals provided by a plurality of satellites are connected to the first input port through a coaxial cable.

[0092] In the embodiments provided by the present disclosure, each first input port receives a broadcast signal, and in combination with the above examples, it can be known that the signals received by the first input port can include a plurality of types. Specifically, each first input port can be coupled with a coaxial cable under the new standard to receive a satellite broadcast signal from a plurality of satellites; can be coupled with a coaxial cable under the traditional standard to receive a satellite broadcast signal from one satellite; and can also receive a ground broadcast signal / cable signal.

[0093] In some embodiments, as shown in FIG. 5, the plurality of first input ports 251a are arranged on one receiving terminal.

[0094] The access mode of the broadcast signal is exemplarily described in combination with the above embodiments.

[0095] In some embodiments, one of the plurality of first input ports 251a receives any broadcast signal, and the remaining first input ports 251a do not receive a broadcast signal.

[0096] In another embodiment, two of the plurality of first input ports 251a receive a broadcast signal. For example, one receives a ground broadcast signal / cable signal, and the other receives a satellite broadcast signal output by a coaxial cable under the traditional standard or the new standard. For another example, one receives a satellite broadcast signal output by a coaxial cable under the traditional standard, and the other receives a satellite broadcast signal output by a coaxial cable under the new standard.

[0097] In some embodiments, at least three of the plurality of first input ports 251a receive broadcast signals. For example, one receives a terrestrial broadcast signal / cable signal, one receives a satellite broadcast signal output by a coaxial cable under a new standard, and the remaining at least one first input port 251a receives a satellite broadcast signal output by a coaxial cable under a conventional standard.

[0098] The access mode of the broadcast signal in some embodiments of the present disclosure includes, but is not limited to, the above-mentioned mode.

[0099] In some embodiments, referring to FIG. 5, the display device further comprises a first demodulation module 253a, wherein the first demodulation module 253a has an input terminal. The first demodulation module 253a is configured to analyze the broadcast signal received by the input terminal thereof to generate a first video signal.

[0100] Specifically, the first demodulation module 253a can include a demodulator.

[0101] Further, the number of the first demodulation module 253a can be one or more.

[0102] In some embodiments, as shown in FIG. 4 and FIG. 5, the display device further comprises a first path selection module 252, which is coupled to the plurality of first input ports 251a and the first demodulation module 253a.

[0103] In some embodiments, the first path selection module 252 is configured to access the selected broadcast signal to the selected first demodulation module 253a.

[0104] In some embodiments, the display device further comprises a main controller 254, which is coupled to the first demodulation module 253a and the first path selection module 252, and is configured to provide a first indication signal and control the display device to display based on the first video signal.

[0105] In some embodiments, the main controller 254 can be a system on chip (SOC). It can be part of the controller 250.

[0106] In some embodiments, the receiving terminal, the first path selection module 252 and the first demodulation module 253a can be inside the display device, or can be installed in a digital video converter box which is part of the display device.

[0107] It should be noted that the display device can directly play based on the first video signal when displaying based on the first video signal, or can first record the first video signal and play the recorded first video signal when needed. For example, in some scenarios, a football match and a news program are broadcast at the same time period, and the user can record the news program while watching the football match, and then watch the news program based on the recorded first video signal when convenient. In other scenarios, the display device can also record multiple first video signals. Further, the main controller 254 can determine the recorded or played first video signal based on the user's selection.

[0108] In this embodiment, the display device includes a plurality of first input ports 251a and corresponding first path selection modules 252, such as the display device shown in FIGS. 4-5, and the number of first path selection modules 252 is multiple.

[0109] The first path selection module 252 can be implemented by a controllable switch. The controllable switch form of the first path selection module 252 includes a first common end and at least one first switching end. The first common end is coupled to the corresponding first input port 251a, and the first switching end is coupled to the corresponding first demodulation module 253a of the corresponding first input port 251a. The controllable switch form of the first path selection module 252 responds to the first indication signal to establish or break the coupling between the first common end and the first switching end, so as to connect the selected broadcast signal to the selected first demodulation module 253a. In this way, the display device can receive multiple broadcast signals and connect the broadcast signals to the corresponding first demodulation module 253a through the first path selection module 252, thereby improving the adaptability of the display device.

[0110] For ease of description, hereinafter, the first path selection switch 252' is used to represent the controllable switch form of the first path selection module 252.

[0111] In some embodiments, as shown in FIG. 6, the first path selection switch 252' corresponds to the first input port 251a.

[0112] Specifically, in some embodiments, the first input port 251a can correspond to the first path selection switch 252'.

[0113] As shown in FIG. 6, the first path selection switch 252' has a first common end and at least one first switching end. The first common end is coupled to the corresponding first input port 251a, and the first switching end is coupled to the input end of the corresponding first demodulation module 253a corresponding to the corresponding first input port 251a.

[0114] The first path selection switch 252' is configured to establish or break the coupling between the first common terminal and the first switching terminal in response to the first indication signal, so as to access the selected broadcast signal into the selected first demodulation module 253a.

[0115] The number of the first demodulation module 253a can be one or more in some embodiments.

[0116] In some embodiments, if the number of the first demodulation module 253a can be one, as shown in FIG. 6, the display device includes three first input ports 251a, each of which corresponds to a first path selection switch 252', and each first path selection switch 252' has a first common terminal and a first switching terminal, and the first switching terminals of all first path selection switches 252' are coupled to the same first demodulation module 253a.

[0117] In this example, the broadcast signal accessed by any first input terminal can be accessed into the first demodulation module 253a.

[0118] In other embodiments, if the number of the first demodulation module 253a can be three, as shown in FIG. 7, the display device includes three first input ports 251a, each of which is coupled to the first common terminal of the corresponding first path selection switch 252', and the first path selection switch 252' includes two first switching terminals, and each first switching terminal of each first path selection switch 252' is coupled to a first demodulation module 253a.

[0119] In some embodiments, if the number of the first demodulation module 253a is multiple, each first path selection switch 252' can be a single-pole double-throw switch, i.e., having two switching terminals. As shown in FIG. 7, for the first path selection switch 252' with the first common terminal labeled 1, it has two switching terminals labeled 1A and 1B, and the two switching terminals are coupled to different first demodulation modules 253a.

[0120] Further, in the example where the number of the first demodulation module 253a is multiple, in some embodiments, as shown in FIG. 8, the first path selection switch 252' can adopt the form of two single-pole single-throw switches; that is, each first path selection switch 252' includes two common terminals and two switching terminals, one common terminal can be coupled or disconnected with one switching terminal (forming a single-pole single-throw switch), and the other common terminal can be coupled or disconnected with the other switching terminal (forming another single-pole single-throw switch).

[0121] The two common terminals of each first path selection switch 252' are coupled with the same first input port 251a, and the two switching terminals are coupled with different first demodulation modules 253a, so that the broadcast signal received by the first input port 251a can be output to one or two first demodulation modules 253a through one or two switching terminals as needed.

[0122] In another embodiment, as shown in FIG. 9, the display device, each first path selection switch 252' can be a single-pole single-throw switch.

[0123] In another embodiment, as shown in FIG. 10, the display device, each first path selection switch 252' can be a single-pole three-throw switch with three switching terminals, each of which is coupled with a different first demodulation module 253a.

[0124] In different embodiments, different forms of first path selection switches 252' can be used for different application scenarios, such as one or more single-pole single-throw, single-pole double-throw, single-pole three-throw, double-pole double-throw, etc., to connect the broadcast signal received by any first input port 251a to the first demodulation module 253a corresponding to the current scenario, so as to achieve the selectivity of the signal.

[0125] In some embodiments of the present disclosure, the first switching terminal of the first path selection switch 252' is coupled with the first demodulation module 253a corresponding to the corresponding first input port 251a. The correspondence between the first input port 251a and the first demodulation module 253a can include multiple modes, which will be described exemplarily below.

[0126] In some embodiments, as shown in FIG. 9, the first input port 251a corresponds to the first demodulation module 253a. In this scenario, each first path selection switch 252' can include a first switching terminal, and the first switching terminal is coupled with the input terminal of the first demodulation module 253a corresponding to the corresponding first input port 251a. For example, the first switching terminal 1A is coupled with the first demodulation module 1, and the first switching terminal 2A is coupled with the first demodulation module 2.

[0127] In another embodiment, as shown in FIG. 6, a plurality of first input ports 251a correspond to one first demodulation module 253a. In this scenario, each first path selection switch 252' can include a first switching terminal, and the first switching terminal of each first path selection switch 252' is coupled with the same first demodulation module 253a. For example, the first switching terminal 1A, the first switching terminal 2A, and the first switching terminal 3A are all coupled with the first demodulation module 1.

[0128] In some embodiments, each first input port 251a corresponds to a plurality of first demodulation modules 253a, and each first path selection switch 252' can include a plurality of first switching terminals, each of which corresponds to a corresponding first demodulation module 253a.

[0129] Further, in some embodiments, as shown in FIG. 10, each first input port 251a can correspond to all first demodulation modules 253a. Specifically, each first path selection switch 252' includes three first switching terminals, each of which corresponds to a first demodulation module 253a, for example, the first switching terminal 1A, the first switching terminal 1B and the first switching terminal 1C corresponding to the first input port 251a are respectively coupled to the first demodulation module 1, the first demodulation module 2 and the first demodulation module 3. In this way, the broadcast signal received by the first input port can be parsed based on any first demodulation module, thereby improving the flexibility of processing.

[0130] In some other embodiments, as shown in FIG. 7, each first input port 251a can correspond to part of the first demodulation modules 253a. For example, the first switching terminal 1A of one first path selection switch 252' is coupled to the first demodulation module 1, and the first switching terminal 1B is coupled to the first demodulation module 2; the first switching terminal 2A of another first path selection switch 252' is coupled to the first demodulation module 3, and the first switching terminal 2B is coupled to the first demodulation module 2; the first switching terminal 3A of another first path selection switch 252' is coupled to the first demodulation module 1, and the first switching terminal 3B is coupled to the first demodulation module 3.

[0131] It should be further noted that in the above example in which each first input port 251a corresponds to a plurality of first demodulation modules 253a, the first demodulation modules 253a corresponding to different first input ports 251a can be the same (as shown in FIG. 10), which can improve the utilization rate of the first demodulation modules 253a. Of course, the first demodulation modules 253a corresponding to different first input ports 251a can also be different. In this case, if a first input port 251a corresponds to 2 first demodulation modules 253a, then 2 first input ports 251a need 4 first demodulation modules 253a.

[0132] In some embodiments, the number of first demodulation modules 253a corresponding to different first input ports 251a can be the same or not. For example, one first input port corresponds to one first demodulation module, and another first input port corresponds to 2 first demodulation modules.

[0133] In some embodiments, FIG. 11a is a structural schematic diagram of another display device provided by the application, as shown in FIG. 11, the display device further includes a second input port 251b.

[0134] In some embodiments, the satellite broadcast signal DVB-S / S2 is accessed into the display apparatus through the first input port 251a, and the terrestrial broadcast signal / cable signal DVB-T / T2 / C is accessed into the display apparatus through the second input port 251b. That is, different broadcast signals are received through different input ports in the present example.

[0135] Of course, in other examples, the access ports of the terrestrial broadcast signal / cable signal and the satellite broadcast signal can not be distinguished, and all are the first input port 251a.

[0136] In some embodiments, as shown in FIG. 11a, the second input port 251b corresponds to at least one second demodulation module 253b, and the second demodulation module 253b does not correspond to the first input port 251a.

[0137] In the present embodiment, the second input port 251b corresponds to the second demodulation module 253b, and the second demodulation module 253b does not correspond to other first input ports 251a, that is, the second demodulation module 253b is used to analyze the broadcast signal received by the second input port 251b. The specification of the second input port 251b can be the same as or different from that of the first input port 251a.

[0138] In other embodiments, as shown in FIG. 11b, the display apparatus, the second input port 251b corresponds to at least one first demodulation module 253a and is directly coupled to the first demodulation module 253a without the need of coupling the first path selection switch.

[0139] Among them, at least one of the first demodulation modules 253a corresponding to the second input port 251b is the first demodulation module 253a corresponding to the first input port 251a.

[0140] For example, as shown in FIG. 11b, the second input port 251b corresponds to the first demodulation module 1 and the first demodulation module 2, wherein the first demodulation module 1 also corresponds to two first input ports 251a.

[0141] It can be understood that, in the present embodiment, the demodulation module is not separately arranged for the second input port 251b, so that the utilization rate of the demodulation module can be improved, thereby saving the number of demodulation modules.

[0142] In some scenarios, a user wants to play and record the same broadcast signal at the same time, so in some embodiments, as shown in the display device of FIG. 11b and FIG. 11c, the second input port 251b can correspond to two demodulation modules. For example, as shown in FIG. 11b, the second input port 251b corresponds to the first demodulation module 1 and the first demodulation module 2; and for example, as shown in FIG. 11c, the second input port 251b corresponds to the first demodulation module 2 and the second demodulation module 253b. In this way, the broadcast signal received by the second input port 251b can be played and recorded at the same time, thereby improving the user experience.

[0143] In some embodiments, the satellite broadcast signal is accessed into the display device through the first input port 251a, and the terrestrial broadcast signal / cable signal is accessed into the display device through the second input port 251b. That is, in this embodiment, the terrestrial broadcast signal / cable signal is demodulated by a special second demodulation module 253b, as shown in FIG. 11a and FIG. 11c.

[0144] In some embodiments, one of the plurality of first input ports 251a is a main input port, and the rest are auxiliary input ports. The control software can preferentially process the signal of the main input port, so that fast display can be realized. For example, referring to FIG. 11b and FIG. 11c, among the three input ports, one first input port 251a is a main input port, which is marked as “main DVB-S / S2” in the figure, and the other first input port 251a is an auxiliary input port, which is marked as “auxiliary DVB-S / S2” in the figure.

[0145] The following will be exemplarily described in combination with actual application scenarios.

[0146] In some embodiments, the display device includes two first input ports 251a and one second input port 251b. As shown in FIG. 11c, the second input port 251b corresponds to one second demodulation module 253b and one first demodulation module 253a; the second input port 251b is coupled with the second demodulation module 253b and one first demodulation module 253a respectively; each first input port 251a is coupled with the first common end of the corresponding first path selection switch 252’, each first path selection switch 252’ includes two first switching ends, each first switching end is coupled with one first demodulation module 253a, and the first path selection switches 252’ corresponding to the two first input ports 251a are both single-pole double-throw switches.

[0147] In operation, referring to FIG. 11c, if the second input port 251b receives a terrestrial broadcast signal / cable signal DVB-T / T2 / C, one of the first input ports 251a (e.g., main DVB-S / S2) receives a satellite broadcast signal DVB-S / S2 under the new standard, and the user wants to record and play simultaneously, the DVB-T / T2 / C is directly connected to the second demodulation module 253b, the first common terminal 1 of the first path selection switch 252' corresponding to the first input port 251a is coupled with the first switching terminal 1A or the first switching terminal 1B, and the DVB-S / S2 is connected to the first demodulation module 1 or the first demodulation module 2. The other first input port 251a (e.g., auxiliary DVB-S / S2) corresponding to the first path selection switch 252' has no first common terminal 2 coupled with any first switching terminal.

[0148] If one of the first input ports 251a (main DVB-S / S2) receives a satellite broadcast signal DVB-S / S2 under the new standard (referred to as new DVB-S / S2), and the other first input port 251a (auxiliary DVB-S / S2) receives a satellite broadcast signal DVB-S / S2 under the traditional standard (referred to as old DVB-S / S2), and the user wants to record and play simultaneously, the first common terminal 1 of the first path selection switch 252' corresponding to one of the first input ports 251a is coupled with the first switching terminal 1B, and the new DVB-S / S2 is connected to the first demodulation module 1. The first common terminal 2 of the first path selection switch 252' corresponding to the other first input port 251a is coupled with the first switching terminal 2B, and the old DVB-S / S2 is connected to the first demodulation module 2.

[0149] In some embodiments, as shown in FIG. 11b, the second input port 251b corresponds to two first demodulation modules 253a, and the second input port 251b is coupled with the two first demodulation modules 253a. Each of the first input ports 251a is coupled with the first common terminal of the corresponding first path selection switch 252', each of the first path selection switches 252' includes two first switching terminals, each of the first switching terminals is coupled with one of the first demodulation modules 253a, and the two first input ports 251a correspond to the same type of first path selection switch 252', such as both being single-pole double-throw switches.

[0150] In operation, as shown in FIG. 11b, if the second input port 251b receives the terrestrial broadcast signal / cable signal DVB-T / T2 / C, and the first input port 251a (hereinafter referred to as the first input port 1) receives the new / old DVB-S / S2 as the main DVB-S / S2, and the user wants to record and play simultaneously, the user can first access the DVB-S / S2, and the first common terminal 1 and the first switching terminal 1A in the corresponding first path selection switch 252' are coupled, and the new / old DVB-S / S2 is first accessed to the first demodulation module 1. For the first demodulation module 1, after receiving the broadcast signal, it will exclude the access of other signals, and then access the DVB-T / T2 / C, and the DVB-T / T2 / C is accessed to the first demodulation module 2. It should be noted that the above uses the order of first accessing the DVB-S / S2 and then accessing the DVB-T / T2 / C. If the DVB-T / T2 / C is first accessed to the first demodulation module 1, the DVB-S / S2 is accessed to the first demodulation module 2, but the feedback signal output by the first demodulation module 2 can only lock the satellite broadcast signal received by the first input port 251a (hereinafter referred to as the first input port 2) as the auxiliary DVB-S / S2, and cannot lock the satellite broadcast signal received by the first input port 1 (for details, please refer to the subsequent examples). Therefore, in this scenario, the access order of DVB-T / T2 / C and DVB-S / S2 needs to be restricted.

[0151] If the first input port 1 receives the new DVB-S / S2 and the first input port 2 receives the old DVB-S / S2, and the user wants to record and play simultaneously, the first common terminal 1 and the first switching terminal 1A in the first path selection switch 252' corresponding to the first input port 1 are coupled, and the new DVB-S / S2 is accessed to the first demodulation module 1. The first common terminal 2 and the first switching terminal 2B in the first path selection switch 252' corresponding to the first input port 2 are coupled, and the old DVB-S / S2 is accessed to the first demodulation module 2.

[0152] Based on the above, in the embodiment of FIG. 11c, the second input port 251b corresponds to a separate second demodulation module 253b. In this way, in the embodiment of realizing recording and playing simultaneously of DVB-T / T2 / C and DVB-S / S2, the order of DVB-T / T2 / C and DVB-S / S2 does not need to be considered. For the embodiment of 11b, the second input port 251b also corresponds to the first demodulation module 253a, which can reduce the number of first demodulation modules 253a.

[0153] In some embodiments, FIG. 12a is a structural schematic diagram of another display device provided by some embodiments of the present disclosure. As shown in FIG. 12a, the first demodulation module 253a has a feedback end. The first demodulation module 253a is configured to output a feedback signal through the feedback end when analyzing the satellite broadcast signal.

[0154] It should be noted that there are some differences between satellite broadcast signals and terrestrial broadcast signals / cable signals. The terrestrial broadcast signals / cable signals are provided by a television station and are relatively stable. The satellite broadcast signals are provided by a satellite, and the angle between the satellite and the signal receiving device affects the quality of the signals. Therefore, in application, the corresponding satellite broadcast signal needs to be locked through a feedback signal to fix the angle between the satellite and the signal receiving device and improve the stability of the signal. In actual locking, the feedback signal must be coupled to the port from which the satellite broadcast signal is sent to achieve locking.

[0155] In some embodiments, continuing to refer to FIG. 12a, the display device further comprises at least one second path selection module 255 corresponding to the first demodulation module 253a, and coupled to the feedback end of the corresponding first demodulation module 253a.

[0156] In some embodiments, as shown in FIG. 12a, the second path selection module 255 corresponds to the first demodulation module 253a.

[0157] In some other embodiments, each second path selection module 255 corresponds to one first demodulation module 253a, but not all first demodulation modules 253a correspond to a second path selection module 255. As shown in FIG. 15, the first demodulation module 2 corresponds to the second path selection module 255, and the first demodulation module 1 does not correspond to the second path selection module 255, but directly corresponds to an LNB unit 256.

[0158] In some embodiments, continuing to refer to FIG. 12a, the second path selection module 255 is configured to, when receiving a feedback signal, establish a coupling between the feedback end of the corresponding first demodulation module 253a and the first input port 251a sending the satellite broadcast signal to the corresponding first demodulation module 253a, so as to lock the satellite broadcast signal received by the corresponding first demodulation module 253a based on the feedback signal.

[0159] For example, as shown in FIG. 12a, if the first demodulation module 1 receives the satellite broadcast signal sent by the first input port 2, and the first demodulation module 1 sends a feedback signal, then the feedback end of the first demodulation module 1 is coupled to the first input port 2. If the first demodulation module 1 receives the satellite broadcast signal sent by the first input port 1, and the first demodulation module 1 sends a feedback signal, then the feedback end of the first demodulation module 1 is coupled to the first input port 1.

[0160] It should be noted that if the input port is a port specially for receiving terrestrial broadcast signals / cable signals, then signal locking is not required. As shown in FIG. 12b, the display device.

[0161] In some embodiments, the display device as shown in FIG. 13, the second path selection module 255 comprises: a second path selection switch 255', corresponding to the first demodulation module 253a, having a second common end and at least one second switching end; the second common end is coupled with the feedback end of the corresponding first demodulation module 253a, and the second switching end is coupled with the corresponding first input port 251a of the corresponding first demodulation module 253a.

[0162] In some embodiments, as shown in FIG. 13, the second path selection switch 255' is configured to establish or break the coupling between the second common end and the second switching end in response to a second indication signal, so as to lock the satellite broadcast signal received by the corresponding first demodulation module 253a based on the feedback signal.

[0163] In some embodiments, the second indication signal can be issued by the main controller 254 based on user selection.

[0164] In the example of FIG. 13, the second input port 251b is used to receive a terrestrial broadcast signal / cable signal, so that the signal of the second input port 251b can not be locked.

[0165] In the present embodiment, the feedback signal issued by the first demodulation module 253a can no longer only lock the satellite broadcast signal received by a fixed input port, but can realize feedback on different satellite broadcast signals received by the first input port through the switching coupling between the second common end and the second switching end of the second path selection switch 255'.

[0166] In some embodiments, the second path selection switch 255' can be a single-pole double-throw switch.

[0167] In some embodiments, each second path selection switch 255' comprises a plurality of single-pole single-throw switches. One end of the plurality of single-pole single-throw switches is coupled as a second common end, and the other end of each single-pole single-throw switch is a second switching end.

[0168] In some other embodiments, each second path selection switch can be a single-pole multi-throw switch.

[0169] In some embodiments, as shown in FIG. 14a, the display device can comprise: an LNB unit 256, coupled with the second path selection switch 255', configured to perform signal processing on the received feedback signal to generate a locking signal for locking the satellite broadcast signal. For example, the LNB unit 256 can perform voltage and frequency processing on the feedback signal to generate a 22KHZ locking signal.

[0170] Further, in some embodiments, as shown in FIG. 14a, the LNB unit 256 corresponds to the first input port 251a, the second common end of the second path selection switch 255' is coupled to the feedback end of the corresponding first demodulation module 253a, the second switching end is coupled to the input end of the corresponding LNB unit 256, and the output end of the LNB unit 256 is coupled to the corresponding first input port 251a.

[0171] For example, the LNB unit 256 can correspond to the first input port 251a.

[0172] For example, the second switching end of each of the second path selection switches 255' is coupled to the input end of one LNB unit 256.

[0173] In this embodiment, the second path selection switch 255' is arranged between the first demodulation module 253a and the LNB unit 256, each LNB unit 256 corresponds to one first input port 251a, the feedback signal output by the first demodulation module 253a is connected to the corresponding second path selection switch 255', the feedback signal is connected to the LNB unit 256 corresponding to the first input port 251a through the second path selection switch 255', the locking signal generated by the LNB unit 256 is transmitted to the corresponding first input port 251a to lock the satellite broadcast signal of the first input port 251a.

[0174] For example, as shown in FIG. 14a, the display device includes two first input ports 251a and one second input port 251b, and two first demodulators; the first input port 1 is the main input port corresponding to the LNB unit 1, and the first input port 2 corresponds to the LNB unit 2. The second input port 251b is connected to DVB-T / T2 / C, the first input port 1 is connected to DVB-S / S2, and the user wants to realize one recording and one broadcasting.

[0175] As shown in FIG. 14a, if DVB-T / T2 / C is connected first, the DVB-T / T2 / C signal is connected to the first demodulation module 1, and when the DVB-S / S2 signal is connected, the DVB-S / S2 signal is connected to the first demodulation module 2 by controlling the first common end of the first path selection module 2 to be coupled to one first switching end; the first common end of the first path selection module n is not coupled to any first switching end; the feedback signal output by the first demodulation module 2 is connected to the corresponding second path selection switch 255', the second common end 2 of the second path selection switch 255' is coupled to the second switching end 2A, and the LNB unit 1 is connected to lock the satellite broadcast signal of the first input port 1.

[0176] As shown in Fig. 14a, if DVB-T / S2 is accessed first, the first common end of the first path selection module 2 is coupled with a first switching end, DVB-S / S2 is accessed to the first demodulation module 1, and DVB-S / T2 is accessed to the first demodulation module 2. The first common end of the first path selection module n is not coupled with any first switching end; the first demodulation module 1 outputs feedback signal to the corresponding second path selection switch 255', the second common end 1 of the second path selection switch 255' is coupled with the second switching end 1A, accesses the LNB unit 1, and locks the satellite broadcast signal of the first input port 1.

[0177] In this embodiment, the second path selection switch is set to enable DVB-T / S2 and DVB-S / S2 to lock the corresponding satellite broadcast signal regardless of the access sequence, thereby improving the versatility of the display device.

[0178] In other embodiments, as shown in Fig. 14b, the display device, the LNB unit 256 corresponds to the first demodulation module 253a, the input end of the LNB unit 256 is coupled with the feedback end of the corresponding first demodulation module 253a, the output end of the LNB unit 256 is coupled with the second common end of the second path selection switch 255' corresponding to the first demodulation module 253a; the second switching end is coupled with the first input port 251a.

[0179] For example, the LNB unit 256 corresponds to the first demodulation module 253a.

[0180] For example, each second switching end is coupled with a first input port 251a.

[0181] For example, the multiple second switching ends under the same second path selection switch correspond to all the first input ports 251a.

[0182] In this embodiment, the LNB unit 256 is arranged between the first demodulation module 253a and the first path selection switch 252, each LNB unit 256 corresponds to a first demodulation module 253a, and the locking signal output by the LNB unit 256 is accessed to the first input port 251a emitting the satellite broadcast signal through the second path selection switch to lock the satellite broadcast signal of the first input port 251a.

[0183] For specific examples, refer to the above examples, which are not repeated here.

[0184] In another embodiment, FIG. 15 is a structural schematic diagram of another display device according to some embodiments of the present disclosure. As shown in FIG. 15, the number of first demodulation modules 253a is multiple, and part of the first demodulation modules 253a correspond to the second path selection switch 255, and part of the first demodulation modules 253a do not correspond to the second path selection switch 255.

[0185] Further, the first demodulation module 253a corresponding to the second input port 251b does not correspond to the second path selection switch 255'.

[0186] For example, as shown in FIG. 15, the second input port 251b is coupled with the first demodulation module 1, the first demodulation module 1 does not correspond to the second path selection switch 255', and is coupled with the LNB unit 256; the first demodulation module 2 corresponds to the second path selection switch 255', and is coupled with the second path selection switch 255'. The second input port 251b accesses DVB-T / T2 / C, and the first input port 1 accesses DVB-S / S2. In the case of DVB-T / T2 / C being accessed first, DVB-T / T2 / C accesses the first demodulation module 1, DVB-S / S2 accesses the first demodulation module 2, the feedback signal output by the first demodulation module 2 is input to the LNB unit 2, and is fed back to the first input port 1 through the second path selection switch 255', so as to lock the DVB-S / S2 accessed by the first input port 1.

[0187] The embodiment can meet the requirements in each working mode by using fewer second path selection switches 255' and fewer first demodulation modules 1.

[0188] In some embodiments, as shown in FIG. 16a, the display device further comprises a plurality of first tuning units 257a.

[0189] In some embodiments, as shown in FIG. 16a, the first tuning unit 257a is coupled with the first path selection switch 252', and the first tuning unit 257a is configured to perform format conversion processing on the received broadcast signal to generate a converted broadcast signal.

[0190] In some embodiments, the first demodulation module 253a is configured to generate a first video signal based on the converted broadcast signal.

[0191] In the embodiment, the first tuning unit 257a is used to convert the broadcast signal into a broadcast signal in a format that can be recognized by the first tuning unit 257a, i.e., a converted broadcast signal.

[0192] In some embodiments, the first tuning unit 257a comprises a tuner.

[0193] In some embodiments, as shown in FIG. 16a, the first tuning unit 257a corresponds to the first demodulation module 253a.

[0194] For example, each first tuning unit 257a corresponds to one first demodulation module 253a. In which the first demodulation module 253a can correspond to multiple first tuning units 257a.

[0195] In some embodiments, as shown in FIG. 16b, the first common terminal of the first path selection switch 252' is coupled with the corresponding first input port 251a, and the first switching terminal is coupled with the input terminal of the corresponding first tuning unit 257a; the output terminal of the first tuning unit 257a is coupled with the corresponding first demodulation module 253a.

[0196] In this embodiment, the first path selection switch 252' is arranged between the first input terminal and the first demodulation module 253a. For example, as shown in FIG. 16a, the first input port 1 is coupled with the first common terminal 1, the first switching terminal 1A is coupled with the first tuning unit 1, and the first switching terminal 1B is coupled with the first tuning unit 2; the first tuning unit 1 is coupled with the first demodulation module 1, and the first tuning unit 2 is coupled with the first demodulation module 2. The first input port 2 is coupled with the second common terminal 2, the first switching terminal 2A is coupled with the first tuning unit 1, and the first switching terminal 2B is coupled with the first tuning unit 2; the first tuning unit 1 is coupled with the first demodulation module 1, and the first tuning unit 2 is coupled with the first demodulation module 2.

[0197] In some other embodiments, as shown in FIG. 16C, the first tuning unit 257a corresponds to the first input port 251a.

[0198] For example, the first tuning unit 257a corresponds to the first input port 251a.

[0199] In some embodiments, as shown in FIG. 16a, the input terminal of the first tuning unit 257a is coupled with the corresponding first input port 251a, and the output terminal of the first tuning unit 257a is coupled with the input terminal of the corresponding first demodulation module.

[0200] In this embodiment, the first tuning unit 257a is arranged between the first input port 251a and the first path selection switch 252'. For example, one first input port 251a (hereinafter referred to as first input port 1) is coupled with the input end of one first tuning unit 257a (hereinafter referred to as first tuning unit 1), and another first input port 251a (hereinafter referred to as first input port 2) is coupled with the input end of another first tuning unit 257a (hereinafter referred to as first tuning unit 2). The output end of the first tuning unit 1 is coupled with the first common end of one first path selection switch 252' (hereinafter referred to as first path selection switch 1), one first switching end of the first path selection switch 1 is coupled with the first demodulation module 1, and the other first switching end is coupled with the first demodulation module 2. The output end of the first tuning unit 2 is coupled with the first common end of another first path selection switch 252' (hereinafter referred to as first path selection switch 2), one first switching end of the first path selection switch 2 is coupled with the first demodulation module 1, and the other first switching end is coupled with the first demodulation module 2.

[0201] In some embodiments, the first path selection switch 252' corresponding to the same first input port 251a and the corresponding first demodulation module 253a can be arranged integrally, that is, arranged as an integrated structure.

[0202] In some embodiments, the first path selection switch 252' corresponding to the same first input port 251a and the corresponding first demodulation module 253a can be arranged separately.

[0203] In some embodiments, as shown in FIG. 16a, the display device further comprises at least one second tuning unit 257b, wherein the second tuning unit 257b corresponds to the second input port 251b. The second input port 251b is coupled with the corresponding second tuning unit 257b, and the second tuning unit 257b is coupled with the first demodulation module 253a corresponding to the second input port 251b.

[0204] In actual application, DVB-T / T2 / C and DVB-S / S2 need to be converted by different tuning modules, so the second tuning unit 257b is arranged in this embodiment, which is specially used for converting DVB-T / T2 / C. In some embodiments, the second input port 251b is coupled with the input end of different second tuning units 257b respectively, and the output end of each second tuning unit 257b is coupled with a first demodulation module 253a.

[0205] For example, as shown in FIG. 16a, the second input port 251b is used to receive DVB-T / T2 / C, and the second input port 251b is coupled with the second tuning unit 1 and the second tuning unit 2 respectively, wherein the second tuning unit 1 is coupled with the second demodulation module 1, and the second tuning unit 2 is coupled with the first demodulation module 2.

[0206] In some embodiments, as shown in FIG. 16c, the second tuning unit 257b corresponds to the second input port 251b, wherein the input end of the second tuning unit 257b is coupled with the second input port 251b, and the output end of the second tuning unit 257b is coupled with the first demodulation module 1 and the first demodulation module 2 respectively.

[0207] For example, the second tuning unit 257b corresponds to the second input port 251b. In this embodiment, the second input port 251b corresponds to one second tuning unit 257b.

[0208] In some other embodiments, part of the first demodulation module 253a corresponds to the second path selection switch 255', and part of the first demodulation module 253a does not correspond to the second path selection switch.

[0209] For example, as shown in FIG. 16d, the first demodulation module 1 is coupled with the LNB unit 1, and there is no corresponding second path selection switch; the first demodulation module 2 is coupled with the LNB unit 1 or the LNB unit 2 through the second path selection switch 255'. Thus, this embodiment can save the number of second path selection switches.

[0210] In some embodiments, as shown in FIG. 16e, the second input port 251b corresponds to the second demodulation module 253b, wherein the second demodulation module 253b does not correspond to any second input port 251b.

[0211] For example, as shown in FIG. 16d, the second input port 251b is coupled with the input end of the second tuning unit 1, and the output end of the second tuning unit 1 corresponds to the second demodulation module 253b.

[0212] In some embodiments, the display device includes three input ports, one of which is used to receive ground broadcast signals / cable signals, one is used to receive new DVB-S / S2, and the other is used to receive traditional DVB-S / S2.

[0213] In some embodiments, the input interfaces of new DVB-S / S and traditional DVB-S / S2 can be interchangeable, that is, the input port receiving new DVB-S / S can also receive traditional DVB-S / S2.

[0214] It should be noted that the space occupied by the demodulator and the tuner is relatively large, and the scenario of too many signal accesses is actually less practical, so three input ports can meet the user's demand, which can save space.

[0215] In some embodiments, as shown in FIGS. 16a-16d, the three input ports can include one second input port 251b and two first input ports 251a.

[0216] In other embodiments, the three input ports include three first input ports 251a, i.e., each input port corresponds to a first path selection switch 252'.

[0217] In some embodiments, the display device can further include a filter isolation circuit corresponding to each first input port 251a or second input port 251b. The filter isolation circuit is configured to filter out noise in the broadcast signal.

[0218] In some embodiments, the display device can further include a low noise amplifier (LNA).

[0219] The input end of the low noise amplifier is coupled to the output end of the corresponding filter isolation circuit.

[0220] The following takes FIG. 16a as an example to illustrate the processing flow of the broadcast signal of the display device in various application modes of one recording and one broadcasting.

[0221] The application mode corresponding to one recording and one broadcasting includes:

[0222] Mode (1): one DVB-S / S2 signal and one DVB-T / T2 / C signal are accessed, and the DVB-S / S2 signal is accessed first, realizing one recording and one broadcasting;

[0223] Mode (2): one DVB-S / S2 signal and one DVB-T / T2 / C signal are accessed, and the DVB-T / T2 / C signal is accessed first, realizing one recording and one broadcasting;

[0224] Mode (3): two DVB-S / S2 signals are accessed, realizing one recording and one broadcasting;

[0225] Mode (4): one DVB-S / S2 signal under a new standard is accessed, realizing one recording and one broadcasting.

[0226] In combination with the example in FIG. 16a, if one DVB-S / S2 signal is received, it is input through the main input port (the first input port 1) first.

[0227] For mode (1), the second input port 1 receives DVB-T / T2 / C and the first input port 1 receives DVB-S / S2. DVB-T / T2 / C is accessed first, so DVB-T / T2 / C is processed by the second tuning unit 1 first, and the processed signal is accessed to the first demodulation module 1. The first input port 1 receives DVB-S / S2, the first common terminal 1 of the first path selection switch 252' is coupled with the first switching terminal 1B, DVB-S / S2 is processed by the first tuning unit 2, and the generated signal is accessed to the first demodulation module 2. The second common terminal 2 of the second path selection switch 255' is coupled with the second switching terminal 2A, and the feedback signal from the first demodulation module 2 locks DVB-S / S2 through the LNB unit 2. The two first video signals outputted by the first demodulation module 1 and the first demodulation module 2 are accessed to the main controller 254, and the main controller 254 determines the signal to be played or recorded based on the user selection.

[0228] For mode (2), continuing to refer to FIG. 16a, the first input port 1 receives DVB-S / S2 and the second input port 1 receives DVB-T / T2 / C. DVB-S / S2 is accessed first, so DVB-S / S2 is processed by the first tuning unit 1 first, and the first common terminal 1 of the first path selection switch 252' is coupled with the first switching terminal 1A. The DVB-S / S2 signal processed by the first tuning unit 1 is accessed to the first demodulation module 1. The second common terminal 1 of the second path selection switch 255' is coupled with the second switching terminal 1B, and the feedback signal from the first demodulation module 1 locks DVB-S / S2 through the LNB unit 2. DVB-T / T2 / C is accessed to the second tuning unit 2 in the case that the first demodulation module 1 is occupied, and the processed DVB-T / T2 / C signal is accessed to the first demodulation module 2.

[0229] For mode (3), continuing to refer to FIG. 16a, the first input port 1 and the first input port 2 respectively receive a main DVB-S / S2 signal and an auxiliary DVB-S / S2 signal. The first common terminal 1 of one first path selection switch 252' is coupled with the first switching terminal 1A, the main DVB-S / S2 signal is accessed to the first tuning unit 1, and the processed main DVB-S / S2 signal is analyzed by the first demodulation module 1. The second common terminal 1 of the second path selection module 255' is coupled with the second switching terminal 1B, and the feedback signal locks the main DVB-S / S2 signal through the LNB unit 2. The first common terminal 2 of another first path selection switch 252' is coupled with the first switching terminal 2B, the auxiliary DVB-S / S2 signal is accessed to the first tuning unit 2, and the processed auxiliary DVB-S / S2 signal is analyzed by the first demodulation module 2. The second common terminal 2 of the second path selection switch 255' is coupled with the second switching terminal 2B, and the feedback signal locks the auxiliary DVB-S / S2 signal through the LNB unit 1.

[0230] For mode (4), continuing to refer to FIG. 16a, the first input port 1 receives the DVB-S / S2 signal under the new standard, wherein the DVB-S / S2 signal under the new standard includes multiple band signals, different band signals correspond to different satellites; the first path selection switch 252' adopts the form of two single-pole single-throw switches; the first common terminal 1 and the first switching terminal 1A are coupled or disconnected, corresponding to one single-pole single-throw switch; the first common terminal 1 and the first switching terminal 1B are coupled or disconnected, corresponding to another single-pole single-throw switch. The first common terminal 1 of the first path selection switch 252' is coupled with the first switching terminal 1A and the first switching terminal 1B at the same time, the DVB-S / S2 signal under the new standard is connected to the first demodulation module 1 through the first tuning unit 1, and is also connected to the first demodulation module 2 through the first tuning unit 2, the first demodulation module 1 and the first demodulation module 2 are coupled with the main controller 254, the main controller 254 sends a control signal to the first demodulation module 1 and the first demodulation module 2 based on the user's selection, to control the first demodulation module 1 and the first demodulation module 2 to process the signals of the corresponding frequency band, for example, the first demodulation module 1 processes the signals of the first frequency band in the DVB-S / S2 signal, and the first demodulation module 2 processes the signals of the second frequency band in the DVB-S / S2 signal; the second common terminal 1 of the second path selection module 255' is coupled with the second switching terminal 1B, or the second common terminal 2 is coupled with the second switching terminal 2A, and the feedback signal locks the main DVB-S / S2 signal through the LNB unit 2.

[0231] The above is only an example of the one recording and one broadcasting mode, and in actual application, the display device provided by some embodiments of the present disclosure is not limited to the above mode, for example, can also be applied to the one recording or one broadcasting mode, or the one broadcasting and three recording mode.

[0232] Some embodiments of the present disclosure provide a display device, which comprises a plurality of signal input ports, a first path selection module and a first demodulation module, the plurality of signal input ports are coupled with corresponding first demodulation modules through the first path selection module, and the first path selection module can connect the selected broadcast signal to the selected first demodulation module based on the user's selection. In this way, when the signal is replaced, the user does not need to manually plug and unplug the signal connector, but only needs to select to realize the access of different signals, so that the display device can be intelligentized, thereby improving the user experience.

[0233] In some embodiments, the present disclosure further provides a digital video conversion box (STB), commonly known as a set-top box or on-top box, which can be applied to a display device such as a television, and can specifically provide a video signal for the display device.

[0234] In some embodiments, the digital video conversion box can comprise: a plurality of first input ports configured to receive broadcast signals;

[0235] a first demodulation module having an input end and configured to parse a broadcast signal received by the input end thereof to generate a first video signal;

[0236] a first path selection module coupled to the plurality of first input ports and the first demodulation module and configured to input a selected broadcast signal to a selected first demodulation module;

[0237] a main controller coupled to the first demodulation module and the first path selection module and configured to control the display device to display based on the first video signal.

[0238] The first input port, the first demodulation module, the first path selection module, and the main controller in the embodiment are the same as or similar to the first input port, the first demodulation module, the first path selection module, and the main controller in any of the display device embodiments described above, and details are referable to the display device embodiments described above, which will not be described herein again.

[0239] Some embodiments of the display device include a display 260, and a controller 250 and a signal converter 210 integrated on a main board, as shown in FIG. 3. The controller 250 and other related components on the main board are coupled to the display 260. The components on the main board cooperate with each other to process a broadcast signal received by the display device into an audio / video signal, and then output the audio / video signal to the display 260 for playing.

[0240] As shown in FIG. 17, in some embodiments, the components integrated on the main board of the display device can include a controller 70, an input path selection module 51, a first signal demodulation module 521, and a second signal demodulation module 522.

[0241] The input path selection module 51 has a plurality of signal input ends to receive different broadcast signals. For example, FIG. 17 shows two signal input ends, i.e., a second signal input end IN2 and a third signal input end IN3, which are configured to receive different satellite broadcast signals (i.e., broadcast signals transmitted based on the DVB-S standard or the DVB-S2 standard, hereinafter referred to as DVB-S / S2 signals). For example, the second signal input end IN2 is configured to receive a first satellite broadcast signal, and the third signal input end IN3 is configured to receive a second satellite broadcast signal.

[0242] The input path selection module 51 has at least two signal output ends. For example, FIG. 17 shows two signal output ends, i.e., a first signal output end OUT1 and a second signal output end OUT2. The first signal output end OUT1 is coupled to the first signal demodulation module 521, and the second signal output end OUT2 is coupled to the second signal demodulation module 522.

[0243] Correspondingly, the input path selection module 51 can be configured to couple the at least one signal input end with the at least one signal output end, so as to output the broadcast signal received by any signal input end through the coupled signal output end to the corresponding demodulation module. That is, the input path selection module 51 can perform gating control on the input path of the broadcast signal received by any signal input end thereof, so as to deliver the received broadcast signal to one or two demodulation modules for channel demodulation.

[0244] For example, the input path selection module 51 shown in FIG. 17 can couple the second signal input end IN2 with any one or both of the two signal output ends OUT1 and OUT2, so as to output the first satellite broadcast signal received by the second signal input end IN2 through the coupled signal output end, thereby delivering the first satellite broadcast signal to any one or both of the first signal demodulation module 521 and the second signal demodulation module 522.

[0245] Alternatively, the input path selection module 51 can couple the third signal input end IN3 with any one or both of the two signal output ends OUT1 and OUT2, so as to output the second satellite broadcast signal received by the third signal input end IN3 through the coupled signal output end, thereby delivering the second satellite broadcast signal to any one or both of the first signal demodulation module 521 and the second signal demodulation module 522.

[0246] In some embodiments, the first signal demodulation module 521 and the second signal demodulation module 522 are configured to perform channel demodulation on the received broadcast signal to generate a video signal that can be recognized by the controller 70, i.e., the first video signal as described in the foregoing embodiments. For example, the video signal can be a TS stream (Transport Stream).

[0247] As shown in FIG. 17, the first signal demodulation module 521 is coupled with the first signal output end OUT1 and is configured to perform channel demodulation on the broadcast signal output by the first signal output end OUT1 to generate a corresponding TS stream.

[0248] The second signal demodulation module 522 is coupled with the second signal output end OUT2 and is configured to perform channel demodulation on the broadcast signal output by the second signal output end OUT2 to generate a corresponding TS stream.

[0249] The controller 70 is coupled to the first signal demodulation module 521 and the second signal demodulation module 522 respectively, and is configured to decode the TS stream generated by any one of the first signal demodulation module 521 and the second signal demodulation module 522, and obtain an audio and video signal in a specific format, and play the audio and video signal through the display 260, and store the TS stream generated by the other of the first signal demodulation module 521 and the second signal demodulation module 522.

[0250] For example, the controller 70 can store the TS stream in the memory of the display device, or in an external storage device coupled to the display device.

[0251] In this way, in some embodiments, the display device can control any one of the two demodulation modules to work, demodulate the input broadcast signal into a TS stream, and play the TS stream through the display, to meet the user's demand for playing a television program.

[0252] In other embodiments, the display device can control the two demodulation modules to work simultaneously, and demodulate the broadcast signals received by the same or different signal input terminals respectively, wherein the TS stream demodulated by one of the demodulation modules can be played through the display unit, and the TS stream demodulated by the other of the demodulation modules can be stored (i.e., recorded) through the storage unit built-in or external to the display device, to meet the user's demand for recording and playing a television program.

[0253] The display device provided in the above embodiments is configured with at least two demodulation modules, and the input path selection module is used to realize the input path selection of the broadcast signal from any signal input terminal to any one or both of the demodulation modules, so that the parallel processing of one or multiple broadcast signals can be realized, and the user's demand for playing, recording, and recording and playing a television program can be met.

[0254] It can be understood that the number of broadcast signals processed in parallel corresponds to the number of demodulation modules, and in other embodiments, three or more demodulation modules can be configured in the display device to realize the parallel processing of more broadcast signals.

[0255] In order to ensure the stability of the received satellite broadcast signal, it is necessary to lock the frequency of the satellite broadcast signal, so that the display device can continuously and stably receive the satellite broadcast signal of the corresponding frequency point.

[0256] Therefore, as shown in FIG. 17, in some embodiments, the first signal demodulation module 521 is further coupled to the second signal input terminal IN2 to form a first feedback path L1; correspondingly, the first signal demodulation module 521 can be further configured to generate a first frequency locking signal and feed back the first frequency locking signal to the second signal input terminal IN2.

[0257] As shown in FIG. 17, in some other embodiments, the second signal demodulation module 522 is further coupled with a third signal input terminal IN3 to form a second feedback path L2; correspondingly, the second signal demodulation module 522 can be further configured to generate a second frequency-locked signal and feed back the second frequency-locked signal to the third signal input terminal IN3.

[0258] The first frequency-locked signal and the second frequency-locked signal can be fed back to a frequency conversion device, such as a Unicable device, outside the display device via the corresponding signal input terminal, so that the frequency conversion device realizes frequency locking of the satellite broadcast signal processed thereby, and ensures that the satellite broadcast signal output by the frequency conversion device always contains the locked frequency point.

[0259] The inventor has found that, based on the first feedback path L1 and the second feedback path L2, the working modes of the display device are limited, for example, the first signal demodulation module 521 cannot generate the first frequency-locked signal and feed back the first frequency-locked signal to the third signal input terminal IN3 in the modes (2) and (4) described above.

[0260] To this end, the display device shown in FIG. 17 provides a solution, which does not require modification of the hardware structure of the display device, but only needs to change the software configuration of the main controller, i.e., changing the transmission destination of the frequency-locked indication signal by the controller 70, so as to change the generator of the frequency-locked signal. In this way, not only the working modes of the display device can be expanded, but also the cost of the display device can be controlled.

[0261] Specifically, in different embodiments, the controller 70 can be configured to perform at least one of the following frequency-locked control processes F1-F4.

[0262] Frequency-locked control process F1:

[0263] In the case where the first signal demodulation module 521 demodulates the first satellite broadcast signal received through the second signal input terminal IN2, the controller 70 sends a first frequency-locked indication signal to the first signal demodulation module 521, instructing the first signal demodulation module 521 to generate a first frequency-locked signal for locking the frequency point X1 demodulated by the first signal demodulation module 521; thus, the first signal demodulation module 521 can feed back the first frequency-locked signal generated thereby to the second signal input terminal IN2 through the first feedback path L1, so as to realize locking of the frequency point X1 in the first satellite broadcast signal and ensure that the received first satellite broadcast signal always contains the frequency point X1.

[0264] That is, in the case that the first signal demodulation module 521 demodulates the first satellite broadcast signal received through the second signal input terminal IN2, i.e. in the case that the second signal input terminal IN2 is coupled with the first signal output terminal OUT1, the controller 70 can instruct the first signal demodulation module 521 to generate a corresponding first lock-in signal and feed it back to the second signal input terminal IN2 by sending a first lock-in instruction signal to the first signal demodulation module 521, so as to realize the locking of the corresponding frequency point in the first satellite broadcast signal demodulated by the first signal demodulation module 521.

[0265] Lock-in control flow F2:

[0266] In the case that the second signal demodulation module 522 demodulates the second satellite broadcast signal received through the third signal input terminal IN3, the controller 70 sends a second lock-in instruction signal to the second signal demodulation module 522 to instruct the second signal demodulation module 522 to generate a second lock-in signal for locking the frequency point X2 demodulated by the second signal demodulation module 522; thus, the second signal demodulation module 522 can feed the second lock-in signal generated thereby back to the third signal input terminal IN3 through the second feedback path L2, so as to realize the locking of the frequency point X2 in the second satellite broadcast signal and ensure that the received second satellite broadcast signal always contains the frequency point X2.

[0267] That is, in the case that the second signal demodulation module 522 demodulates the second satellite broadcast signal received through the third signal input terminal IN3, i.e. in the case that the third signal input terminal IN3 is coupled with the second signal output terminal OUT2, the controller 70 can instruct the second signal demodulation module 522 to generate a corresponding second lock-in signal and feed it back to the third signal input terminal IN3 by sending a second lock-in instruction signal to the second signal demodulation module 522, so as to realize the locking of the corresponding frequency point in the second satellite broadcast signal demodulated by the second signal demodulation module 522.

[0268] Lock-in control flow F3:

[0269] In the case that the second signal demodulation module 522 demodulates the first satellite broadcast signal received through the second signal input terminal IN2, the controller 70 sends a first lock-in instruction signal to the first signal demodulation module 521 to instruct the first signal demodulation module 521 to generate a first lock-in signal for locking the frequency point X2 demodulated by the second signal demodulation module 522; thus, the first signal demodulation module 521 can feed the first lock-in signal generated thereby back to the second signal input terminal IN2 through the first feedback path L1, so as to realize the locking of the frequency point X2 in the first satellite broadcast signal and ensure that the received first satellite broadcast signal always contains the frequency point X2.

[0270] Since in the case that the second signal demodulation module 522 demodulates the first satellite broadcast signal received through the second signal input terminal IN2, i.e. in the case that the second signal input terminal IN2 is coupled with the second signal output terminal OUT2, the frequency point to be locked is the frequency point X2 demodulated by the second signal demodulation module 522, which is contained in the first satellite broadcast signal, it is necessary to feed back the corresponding frequency-locked signal to the second signal input terminal IN2; while if the second signal demodulation module 522 is sent the second frequency-locked indication signal as in F2, the second frequency-locked signal generated by the second signal demodulation module 522 will be fed back to the third signal input terminal IN3, and the frequency point X2 in the first satellite broadcast signal cannot be locked.

[0271] Therefore, in the frequency-locked control flow F3, the controller 70 implements the relay control of the frequency-locked signal, i.e. sends the first frequency-locked indication signal to the first signal demodulation module 521 (instead of sending it to the second signal demodulation module 522 as in F2), so as to instruct the first signal demodulation module 521 (instead of the second signal demodulation module 522) to generate the first frequency-locked signal for locking the frequency point X2 and feed it back to the second signal input terminal IN2, so as to realize the locking of the frequency point X2 contained in the first satellite broadcast signal and demodulated by the second signal demodulation module 522.

[0272] The frequency-locked control flow F4:

[0273] In the case that the first signal demodulation module 521 demodulates the second satellite broadcast signal received through the third signal input terminal IN3, the controller 70 sends the second frequency-locked indication signal to the second signal demodulation module 522, instructing the second signal demodulation module 522 to generate the second frequency-locked signal for locking the frequency point X1 demodulated by the first signal demodulation module 521; so that the second frequency-locked signal can be fed back to the third signal input terminal IN3 based on the feedback path between the second signal demodulation module 522 and the third signal input terminal IN3, so as to realize the locking of the frequency point X1 in the second satellite broadcast signal and ensure that the received second satellite broadcast signal always contains the frequency point X1.

[0274] Since in the case that the first signal demodulation module 521 demodulates the second satellite broadcast signal received through the third signal input terminal IN3, the frequency point to be locked is the frequency point X1 demodulated by the first signal demodulation module 521, which is contained in the second satellite broadcast signal, it is necessary to feed back the corresponding frequency-locked signal to the third signal input terminal IN3; while if the first signal demodulation module 521 is sent the first frequency-locked indication signal as in F1, the first frequency-locked signal generated will be fed back to the second signal input terminal IN2, and the frequency point X1 in the second satellite broadcast signal cannot be locked.

[0275] Therefore, in the frequency locking control flow F4, the controller 70 implements the relay control of the frequency locking signal, i.e. sends the second frequency locking indication signal to the second signal demodulation module 522 (instead of sending it to the first signal demodulation module 521 as in F1), so as to instruct the second signal demodulation module 522 (instead of the first signal demodulation module 521) to generate the second frequency locking signal for locking the frequency point X1 and feedback to the third signal input end IN3, so as to realize the locking of the frequency point X1 contained in the second satellite broadcast signal and demodulated by the first signal demodulation module 521.

[0276] In different embodiments, the frequency points X1 and X2 demodulated by different demodulation modules can refer to the same frequency point, such as 1210MHz, or two different frequency points, such as 1210MHz and 1420MHz.

[0277] It should be noted that in the above frequency locking control flows F1 and F3, the first signal demodulation module 521 needs to generate the first frequency locking signal, and the difference lies in that: in the case of F1, the first frequency locking signal generated by the first signal demodulation module 521 is used to lock the frequency point X1 demodulated by the first signal demodulation module 521; in the case of F3, the first frequency locking signal generated by the first signal demodulation module 521 is used to lock the frequency point X2 demodulated by the second signal demodulation module 522. For the convenience of description and distinction, the first frequency locking signal generated in the case of F1 can be denoted as D11, and the first frequency locking signal generated in the case of F3 can be denoted as D12.

[0278] Similarly, in the above frequency locking control flows F2 and F4, the second signal demodulation module 522 needs to generate the second frequency locking signal, and the difference lies in that: in the case of F2, the second frequency locking signal generated by the second signal demodulation module 522 is used to lock the frequency point X2 demodulated by the second signal demodulation module 522; in the case of F4, the second frequency locking signal generated by the second signal demodulation module 522 is used to lock the frequency point X1 demodulated by the first signal demodulation module 521. For the convenience of description and distinction, the second frequency locking signal generated in the case of F2 can be denoted as D21, and the second frequency locking signal generated in the case of F4 can be denoted as D22.

[0279] In some embodiments, in the above frequency locking control flow F3, the second signal demodulation module 522 is in the power-on working state (i.e. channel demodulation), and at this time, the first signal demodulation module 521 can also be in the power-on working state; in this case, the first frequency locking indication signal sent by the controller 70 can be immediately received and responded by the first signal demodulation module 521, so as to generate the corresponding first frequency locking signal.

[0280] In some other embodiments, in the above frequency locking control procedure F3, the first signal demodulation module 521 can originally be in a sleep or off state, i.e., the first signal demodulation module 521 does not receive a broadcast signal and does not perform a channel demodulation procedure. In this case, the controller 70 can first wake up or power on the first signal demodulation module 521, and then send a first frequency locking indication signal to the first signal demodulation module 521, so that the first signal demodulation module 521 responds and generates a corresponding first frequency locking signal.

[0281] Similarly, in the above frequency locking control procedure F4, the first signal demodulation module 521 is in a powered-on working state. In different embodiments, the second signal demodulation module 522 can be in a powered-on working state or in a sleep or off state. For the case where the second signal demodulation module 522 is in a powered-on working state, the controller 70 can directly send a second frequency locking indication signal to the second signal demodulation module 522. For the case where the second signal demodulation module 522 is in a sleep or off state, the controller 70 can also first wake up or power on the second signal demodulation module 522, and then send a second frequency locking indication signal to it.

[0282] In some embodiments, the controller 70 can send a frequency locking indication signal to at least one of the two demodulation modules 521 and 522 based on an Inter-Integrated Circuit Bus (I2C bus). Correspondingly, the frequency locking indication signal is a serial digital signal conforming to the I2C bus protocol.

[0283] Since the signal input end is connected to an Unicable device or the like outside the display device through a coaxial cable, it can only transmit analog signals and cannot transmit digital signals, and therefore the frequency locking signal should also be in the form of an analog signal. In view of this, after receiving the frequency locking indication signal, the two demodulation modules 521 and 522 can generate a corresponding frequency locking signal in the form of an analog signal based on other specific protocols different from the I2C bus protocol, and feed back to the corresponding signal input end.

[0284] For example, the frequency locking signal generated by the demodulation module can be a 22KHz square wave signal, each cycle of the square wave signal corresponds to one bit, and the duration of the 0 level (blank part) in each cycle corresponds to different bit values (0 or 1), for example: each cycle is 1.5ms, if the duration of the 0 level is 0.5ms, then the bit value represented by the cycle is 0, if the duration of the 0 level is 1ms, then the bit value represented by the cycle is 1. In this way, any digital signal can be converted into a frequency locking signal in the form of an analog signal and fed back to the corresponding signal input end.

[0285] In different embodiments, the controller 70 can execute one of the above frequency locking control processes F1-F4, or execute two of them, so as to make the display device work in different working modes.

[0286] In some embodiments, the display device can receive two DVB-S / S2 signals, i.e., the first DVB-S / S2 signal is received by the second signal input end IN2, and the second DVB-S / S2 signal is received by the third signal input end IN3, i.e., the mode (3) described above.

[0287] In the case of mode (3), the input path selection module 51 can couple the second signal input end IN2 with the first signal output end OUT1, and couple the third signal input end IN3 with the second signal output end OUT2. Thus, the first DVB-S / S2 signal can be output to the first signal demodulation module 521 and demodulated by the first signal demodulation module 521 to obtain one TS stream, and the second DVB-S / S2 signal can be output to the second signal demodulation module 522 and demodulated by the second signal demodulation module 522 to obtain another TS stream, realizing one recording and one broadcasting.

[0288] In the case of mode (3), the above frequency locking control process F1 can be used to make the first signal demodulation module 521 generate a first frequency locking signal D11 and feed it back to the second signal input end IN2, realizing the locking of the corresponding frequency point X1 in the first DVB-S / S2 signal demodulated by the first signal demodulation module 521, and the above frequency locking control process F2 can be used to make the second signal demodulation module 522 generate a second frequency locking signal D21 and feed it back to the third signal input end IN3, realizing the locking of the corresponding frequency point X2 in the second DVB-S / S2 signal demodulated by the second signal demodulation module 522.

[0289] In some embodiments, the display device can receive a first DVB-S / S2 signal based on the Unicable standard through the second signal input end IN2, corresponding to the mode (4) described above.

[0290] In the case of mode (4), the input path selection module 51 can couple the second signal input end IN2 with the first signal output end OUT1 and the second signal output end OUT2 respectively, so as to output the first DVB-S / S2 signal to the first signal demodulation module 521 and the second signal demodulation module 522 through OUT1 and OUT2 respectively, and then demodulate the first DVB-S / S2 signal through the first signal demodulation module 521 and the second signal demodulation module 522 respectively, to obtain two TS streams, realizing one recording and one broadcasting of the same frequency point or two different frequency points in the first DVB-S / S2 signal.

[0291] In the case of mode (4), the first signal demodulation module 521 can generate the first frequency-locked signal D11 and feedback to the second signal input terminal IN2 through the above-mentioned frequency-locked control process F1, so as to realize the locking of the corresponding frequency point X1 in the first DVB-S / S2 signal demodulated by the first signal demodulation module 521; and the first signal demodulation module 521 can generate the first frequency-locked signal D12 and feedback to the second signal input terminal IN2 through the above-mentioned frequency-locked control process F3, so as to realize the locking of the corresponding frequency point X2 in the first DVB-S / S2 signal demodulated by the second signal demodulation module 522.

[0292] That is to say, in the case of mode (4), although the two frequency points X1 and X2 in the first DVB-S / S2 signal are demodulated by two demodulation modules respectively, the frequency-locked signals for locking the two frequency points X1 and X2 are all generated by the first signal demodulation module 521, that is, D11 and D12, so that the two frequency-locked signals D11 and D12 can be fed back to the second signal input terminal IN2, realizing the locking of the two frequency points X1 and X2 contained in the first DVB-S / S2 signal.

[0293] In some embodiments, the display device can also receive a second DVB-S / S2 signal based on the Unicable standard through the third signal input terminal IN3, realizing another mode (6).

[0294] In the case of mode (6), the input path selection module 51 can couple the third signal input terminal IN3 with the first signal output terminal OUT1 and the second signal output terminal OUT2 respectively, so that the first DVB-S / S2 signal is output to the first signal demodulation module 521 and the second signal demodulation module 522 through OUT1 and OUT2 respectively, and then the second DVB-S / S2 signal is demodulated by the first signal demodulation module 521 and the second signal demodulation module 522 respectively, so as to obtain two TS streams, realizing the recording and broadcasting of the same frequency point or two different frequency points in the second DVB-S / S2 signal.

[0295] In the case of mode (6), the second signal demodulation module 522 can generate the second frequency-locked signal D21 and feedback to the third signal input terminal IN3 through the above-mentioned frequency-locked control process F2, so as to realize the locking of the corresponding frequency point X2 in the second DVB-S / S2 signal demodulated by the second signal demodulation module 522; and the second signal demodulation module 522 can generate the second frequency-locked signal D22 and feedback to the third signal input terminal IN3 through the above-mentioned frequency-locked control process F4, so as to realize the locking of the corresponding frequency point X1 in the second DVB-S / S2 signal demodulated by the first signal demodulation module 521.

[0296] That is, in the case of mode (6), although two frequency points X1 and X2 in the first DVB-S / S2 signal are demodulated by two demodulation modules respectively, the frequency-locked signals for locking the two frequency points X1 and X2 are all generated by the second signal demodulation module 522, that is, D21 and D22, so that the two frequency-locked signals D21 and D22 can be fed back to the third signal input end IN3, realizing the locking of the two frequency points X1 and X2 contained in the second DVB-S / S2 signal.

[0297] It can be seen that in the case that the input path selection module 51 selects different input paths for the satellite broadcast signal, based on the two feedback paths, at least one of the above frequency-locked control processes F1-F4 is selected to be executed by the controller 70, so as to instruct which demodulation module generates the frequency-locked signal; for a certain demodulation module, not only can the frequency-locked signal for locking the frequency point demodulated by itself be generated under the instruction of the controller 70, but also the frequency-locked signal for locking the frequency point demodulated by another demodulation module can be generated, decoupling the broadcast signal demodulation process of the demodulation module and the frequency-locked signal generation process, ensuring that the frequency-locked signal can be accurately fed back to the corresponding signal input end, realizing the locking of the satellite broadcast signal of the corresponding frequency point.

[0298] In some embodiments, the first signal demodulation module 521 can be directly coupled with the second signal input end IN2, and the second signal demodulation module 522 can be directly coupled with the third signal input end IN3, as shown in FIG. 17. In other embodiments, the two demodulation modules can also be coupled with the corresponding signal input end through a feedback module, as shown in FIG. 18. Details are described below.

[0299] As shown in FIG. 18, in some embodiments, the display device can further include a feedback module 53.

[0300] In some embodiments, the feedback module 53 can include a first LNB unit 531.

[0301] The input end of the first LNB unit 531 is coupled with the first signal demodulation module 521, and the output end of the first LNB unit 531 is coupled with the second signal input end IN2.

[0302] That is, the first LNB unit 531 is coupled with the first signal demodulation module 521 and the second signal input end IN2 respectively, forming the above-mentioned first feedback path L1, and the first frequency-locked signal generated by the first signal demodulation module 521 can be fed back to the second signal input end IN2.

[0303] In some embodiments, the first LNB unit 531 can employ an LNB power manager (i.e., LNB Power Register) for power management and control of the external device (e.g., Unicable device) of the display device. The LNB power manager not only receives the first frequency-locked signal sent by the first signal demodulation module 521, but also connects with the controller 70 through an I2C bus, and under the control of the controller 70, turns on 13V or 18V power supply; and superimposes the first frequency-locked signal and the 13V or 18V power supply voltage, and sends to the second signal input end IN2, to realize power supply and frequency-locked control of the external device coupled with the second signal input end IN2.

[0304] That is, in the feedback path between the first signal demodulation module and the second signal input end, the first LNB unit is arranged to realize feedback of the corresponding frequency-locked signal; the first LNB unit can also superimpose the power supply voltage and the frequency-locked signal generated by the first signal demodulation module under the control of the controller, and feed back to the second signal input end together, to realize power supply and frequency-locked control of the external device of the display device coupled with the second signal input end.

[0305] In some embodiments, the feedback module 53 can include a second LNB unit 532.

[0306] The input end of the second LNB unit 532 is coupled with the second signal demodulation module 522, and the output end of the second LNB unit 532 is coupled with the third signal input end IN3.

[0307] That is, the second LNB unit 532 is coupled with the second signal demodulation module 522 and the third signal input end IN3 respectively, forms the above-mentioned second feedback path L2, and can feed back the second frequency-locked signal generated by the second signal demodulation module 522 to the third signal input end IN3.

[0308] In some embodiments, the second LNB unit 532 can also employ the above-mentioned LNB power manager, and the related functions are similar to those of the first LNB unit 531, which will not be described here.

[0309] That is, in the feedback path between the second signal demodulation module and the third signal input end, the second LNB unit is arranged to realize feedback of the corresponding frequency-locked signal; the second LNB unit can also superimpose the power supply voltage and the frequency-locked signal generated by the second signal demodulation module under the control of the controller, and feed back to the third signal input end together, to realize power supply and frequency-locked control of the external device of the display device coupled with the third signal input end.

[0310] In some embodiments, only one LNB unit can be provided in the feedback module 53, such as only the first LNB unit 531 or only the second LNB unit 532; in other embodiments, two LNB units, i.e., the first LNB unit 531 and the second LNB unit 532, are provided in the feedback module 53, and only one LNB unit can be in an active state and the other in an idle state, or both LNB units can be in an active state or in an idle state.

[0311] In some embodiments, as shown in FIG. 18, the input path selection module 51 can further include a first signal input end IN1. The first signal input end IN1 is configured to receive a terrestrial broadcast signal (i.e., a broadcast signal transmitted based on the DVB-T standard or the DVB-T2 standard) or a cable signal (i.e., a broadcast signal transmitted based on the DVB-C standard). In some embodiments below, the broadcast signal that can be received by the first signal input end IN1 is referred to as a DVB-T / T2 / C signal.

[0312] It should be noted that the processing manner of the display device in the case where the first signal input end IN1 receives a terrestrial broadcast signal is the same as the processing manner in the case where the first signal input end IN1 receives a cable signal, and the processing manners can be replaced in related embodiments.

[0313] The first signal input end IN1 is coupled with the first signal output end OUT1 and the second signal output end OUT2, respectively, and the terrestrial broadcast signal received by the first signal input end IN1 can be output through at least one of the first signal output end OUT1 and the second signal output end OUT2.

[0314] In some embodiments, based on the first signal input end IN1, the display device can implement mode (5): accessing one terrestrial broadcast signal to realize one recording and one broadcasting. Mode (5) will be described in detail below.

[0315] In some embodiments, as shown in FIG. 18, the input path selection module 51 includes a third controllable switch S3.

[0316] The third switch common end a1 of the third controllable switch S3 is coupled with the second signal input end IN2, one third switch switching end b1 of the third controllable switch S3 is coupled with the first signal output end OUT1, and the other third switch switching end b2 is coupled with the second signal output end OUT2.

[0317] The third controllable switch S3 can be a programmable electronic switching device, such as a transistor.

[0318] Correspondingly, the controller 70 is configured to generate a first indication signal k1; the third controllable switch S3 is configured to, in response to the first indication signal k1, establish or break the coupling between the third switch common end a1 and at least one of the third switch switching ends b1 and b2, so as to realize the coupling between the second signal input end IN2 and at least one of the first signal output end OUT1 and the second signal output end OUT2.

[0319] Therefore, by controlling the third controllable switch S3 through the controller 70, the input path selection module 51 can realize the input path selection of the first DVB-S / S2 signal received by the second signal input end IN2, that is, output the first DVB-S / S2 signal through at least one of the two signal output ends OUT1 and OUT2.

[0320] In some embodiments, the third controllable switch S3 can adopt the form of two single-pole single-throw switches, and under the control of the first indication signal k1, one or both of the two single-pole single-throw switches are closed, so that the third switch common end a1 of the third controllable switch S3 is coupled with any one or both of the two third switch switching ends b1 and b2.

[0321] For example, in response to the first indication signal k1, the third switch common end a1 of the third controllable switch S3 is coupled with the third switch switching end b1, so that the first DVB-S / S2 signal received by the second signal input end IN2 is output through the first signal output end OUT1 corresponding to the third switch switching end b1; or, in response to the first indication signal k1, the third switch common end a1 of the third controllable switch S3 is coupled with the third switch switching end b2, so that the first DVB-S / S2 signal received by the second signal input end IN2 is also output through the second signal output end OUT2 corresponding to the third switch switching end b2.

[0322] In some embodiments, the input path selection module 51 comprises a fourth controllable switch S4.

[0323] The fourth switch common end a2 of the fourth controllable switch S4 is coupled with the second signal input end IN2, one fourth switch switching end b3 of the fourth controllable switch S4 is coupled with the first signal output end OUT1, and the other fourth switch switching end b4 is coupled with the second signal output end OUT2.

[0324] The fourth controllable switch S4 can also adopt a programmable control electronic switching device and be controlled by the first indication signal sent by the controller 70. Specifically, the fourth controllable switch S4 is configured to, in response to the first indication signal k1, establish or break the coupling between the fourth switch common end a2 and at least one of the fourth switch switching ends b3 and b4, so as to realize the coupling between the third signal input end IN3 and at least one of the first signal output end OUT1 and the second signal output end OUT2.

[0325] Therefore, by controlling the fourth controllable switch S4 through the controller 70, the input path selection of the second DVB-S / S2 signal received by the third signal input end IN3 through the input path selection module 51 can be realized, that is, the second DVB-S / S2 signal is output through at least one of the two signal output ends OUT1 and OUT2.

[0326] In some embodiments, the fourth controllable switch S4 can also be in the form of two single-pole single-throw switches, so that the fourth switch common end a2 is coupled with any one or both of the two fourth switch switching ends b3 and b4. The controller 70 controls the fourth controllable switch S4 through the first indication signal k1, and the principle of controlling the third controllable switch S3 is the same, which will not be described here.

[0327] It should be noted that in some embodiments, one or more controllable switches can be provided in the input path selection module 51 according to the input path selection control requirements of one or more signal input ends. For example, in a display device that only needs to perform input path selection on the broadcast signal received by the second signal input end IN2, its input path selection module 51 can only provide the third controllable switch S3; in a display device that only needs to perform input path selection on the broadcast signal received by the third signal input end IN3, its input path selection module 51 can only provide the fourth controllable switch S4; in a display device that needs to perform input path selection on the broadcast signals received by the second signal input end IN2 and the third signal input end IN3 respectively, its input path selection module 51 can provide the third controllable switch S3 and the fourth controllable switch S4.

[0328] In some embodiments, the input path selection module 51 in the display device can further include a plurality of tuning units; each tuning unit is configured to tune the broadcast signal input by each signal input end to convert the broadcast signal from a high-frequency signal to a medium-frequency signal.

[0329] For example, referring to FIG. 18, the input path selection module 51 can include the following four tuning units: a first T signal tuning unit 511, a second T signal tuning unit 512, a first S signal tuning unit 513, and a second S signal tuning unit 514.

[0330] The first T signal tuning unit 511 is coupled with the first signal input end IN1 and the first signal output end OUT1 respectively, and is configured to tune the DVB-T / T2 / C signal received by the first signal input end IN1, and output the tuned medium-frequency signal to the first signal demodulation module 521 through the first signal output end OUT1.

[0331] The second T signal tuning unit 512 is coupled with the first signal input end IN1 and the second signal output end OUT2 respectively, and is configured to tune the DVB-T / T2 / C signal received by the first signal input end IN1, and output the tuned intermediate frequency signal to the second signal demodulation module 522 through the second signal output end OUT2.

[0332] The first S signal tuning unit 513 is coupled with one switching end b1 of the third controllable switch S3 and one switching end b3 of the fourth controllable switch S4 respectively, and is further coupled with the first signal output end OUT1; and is configured to tune the DVB-S / S2 signal received by the second signal input end IN2 or the third signal input end IN3, and output the tuned intermediate frequency signal to the first signal demodulation module 521 through the first signal output end OUT1.

[0333] The second S signal tuning unit 514 is coupled with the other switching end b2 of the third controllable switch S3 and one switching end b4 of the fourth controllable switch S4 respectively, and is further coupled with the second signal output end OUT2; and is configured to tune the DVB-S / S2 signal received by the second signal input end IN2 or the third signal input end IN3, and output the tuned intermediate frequency signal to the second signal demodulation module 522 through the second signal output end OUT2.

[0334] Based on the above four tuning units, the display device can realize simultaneous processing of two DVB-T / T2 / C signals, or simultaneous processing of two DVB-S / S2 signals, or simultaneous processing of one DVB-T / T2 / C signal and one DVB-S / S2 signal, and realize one recording and one playing.

[0335] For example, for the DVB-T / T2 / C signal received by the first signal input end IN1, two intermediate frequency signals corresponding to two different channel television programs can be obtained by tuning through the first T signal tuning unit 511 and the second T signal tuning unit 512 respectively, and the two intermediate frequency signals corresponding to the two different channel television programs can be demodulated through the first signal demodulation module 521 and the second signal demodulation module 522 respectively to obtain TS streams corresponding to the two different channel television programs, one of which can be used for playing and the other for recording.

[0336] Therefore, the input path selection module 51 can not only realize input path selection of the broadcast signals received by each signal input end, but also can tune the broadcast signals on each input path through the tuning unit, select the signals of the required frequency for amplification, and convert them into intermediate frequency signals, thereby reducing interference and improving signal quality.

[0337] For example, the controller 70 can send configuration information to the corresponding tuning unit according to the channel selection operation of the user, so as to control the corresponding tuning unit to tune the signal matching the frequency of the channel selected by the user.

[0338] That is, the frequency point of the signal demodulated by each demodulation module is determined by the tuning selection of the upstream tuning unit; for a satellite broadcast signal, the frequency point demodulated by a certain demodulation module, i.e. the frequency point tuned by the upstream tuning unit of the demodulation module, is locked; and the frequency point tuned by the tuning unit is controlled by the controller 70, which is the frequency point of the channel selected by the user. Therefore, during the frequency locking control process, the controller 70 can determine the frequency point to be locked according to the configuration information of the tuning unit, so as to generate a corresponding frequency locking indication signal to instruct the relevant demodulation unit to generate a corresponding frequency locking signal, thereby realizing the locking of the corresponding frequency point.

[0339] In some embodiments, the above four tuning units can be combined in pairs to form two tuning chips.

[0340] For example, the first T signal tuning unit 511 and the second T signal tuning unit 512 are integrated in one tuning chip, and the first S signal tuning unit 513 and the second S signal tuning unit 514 are integrated in another tuning chip. In this way, the two tuning units in one tuning chip can tune the same type of broadcast signal, which can avoid signal interference.

[0341] For example, the first T signal tuning unit 511 and the first S signal tuning unit 513 are integrated in one tuning chip, and the second T signal tuning unit 512 and the second S signal tuning unit 514 are integrated in another tuning chip. In this way, one tuning chip can have the tuning capability of at least two different types of broadcast signals, which can be applied to more application scenarios.

[0342] In some embodiments, the above four tuning units can also be integrated in one tuning chip. In this way, the integration level of the mainboard in the display device can be improved, the circuit board space occupied by the tuning chip can be reduced, and the number of wirings can be reduced.

[0343] In other possible embodiments, the number and type of tuning units in the input path selection module 51 are not limited to those described above, and other settings can be used according to the configuration requirements of the display device, such as only one T signal tuning unit, one S signal tuning unit, or only two S signal tuning units in the input path selection module 51.

[0344] It should be noted that the various components shown in FIGS. 17 and 18 have the following corresponding relationship with the previous FIGS. 1-16 and the related embodiments:

[0345] The input path selection module 51 corresponds to the first path selection module 252 in some of the above embodiments and the accompanying drawings (e.g., FIG. 4, etc.), and the respective signal input terminals IN2, IN3 correspond to the input terminals of the respective first path selection module 252;

[0346] The first signal demodulation module 521 and the second signal demodulation module 522 correspond to the two first demodulation modules 253a in some of the above embodiments and the accompanying drawings (e.g., FIG. 4, etc.);

[0347] The controller 70 corresponds to the main controller 254 in some of the above embodiments and the accompanying drawings (e.g., FIG. 5, 6, etc.);

[0348] The first T signal tuning unit 511, the second T signal tuning unit 512, the first S signal tuning unit 513, and the second S signal tuning unit 514 correspond to the second tuning unit 1 and the second tuning unit 2 shown by the reference number 257b, and the first tuning unit 1 and the first tuning unit 2 shown by the reference number 257a in FIG. 16a, FIG. 16b, and FIG. 16d;

[0349] The first LNB unit 531 and the second LNB unit 532 can correspond to the LNB unit 1 and the LNB unit 2 shown by the reference number 256 in some of the above drawings (e.g., FIG. 13-16);

[0350] The third controllable switch S3 and the fourth controllable switch S4 correspond to the two first path selection switches 252' shown in FIG. 11b.

[0351] Based on the above correspondence, the contents of the related embodiments can be referred to each other.

[0352] In some embodiments, the main board can be implemented by a printed circuit board, and the input path selection module 51, the first signal demodulation module 521, the second signal demodulation module 522, and the controller 70, etc. can be integrated on the main board by printing, welding, etc.

[0353] In some embodiments, the first signal demodulation module 521 and the controller 70 can be integrated in the same chip, such as a system on chip (SOC).

[0354] In some embodiments, the controller 250 shown in FIG. 3 can be the controller 70; in other embodiments, the controller 250 shown in FIG. 3 can be the above-mentioned SOC chip.

[0355] In some embodiments, the controller 70 is provided with at least two TS stream input interfaces, respectively coupled with the first signal demodulation module 521 and the second signal demodulation module 522, for receiving the TS streams demodulated by the respective demodulation modules.

[0356] In some embodiments, the controller 70 is further provided with one or more configuration information output interfaces. Exemplarily, the configuration information output interfaces can be interfaces for communication based on the I2C bus protocol. The controller 70 can be coupled with the first signal demodulation module 521, the second signal demodulation module 522, the input path selection module 51, etc. through the configuration information output interfaces, for sending configuration information to these components. Exemplarily, the configuration information can include the frequency lock indication signal, the first indication signal k1, etc. as described above.

[0357] In some embodiments, the display device shown in FIG. 18 can implement the modes (1)-(4) and (6) as described above in addition to the mode (5). The following describes the broadcast signal input, processing, and frequency lock control process in the modes (1)-(6) respectively.

[0358] For the mode (5), the broadcast signal input and processing process of the display device is as follows:

[0359] As shown in FIG. 18, after detecting that the DVB-T / T2 / C signal is received by the first signal input end IN1, the display device tunes the DVB-T / T2 / C signal through the first T signal tuning unit 511 and the second T signal tuning unit 512 respectively.

[0360] The intermediate frequency signal generated by the first T signal tuning unit 511 is output through the first signal output end OUT1, and then demodulated by the first signal demodulation module 521 to generate a TS stream.

[0361] The intermediate frequency signal generated by the second T signal tuning unit 512 is output through the second signal output end OUT2, and then demodulated by the second signal demodulation module 522 to generate another TS stream.

[0362] The controller 70 can receive the two TS streams as described above, and play and record them respectively to realize one recording and one playing.

[0363] For the mode (5), there is no DVB-S / S2 signal input in the display device, and no frequency lock control is needed.

[0364] For the mode (1), referring to FIG. 19, the broadcast signal input and processing process of the display device is as follows:

[0365] The display device first detects that the second signal input terminal IN2 receives the first DVB-S / S2 signal, sends a first indication signal k1 to the third controllable switch S3 through the controller 70, controls the third switch common terminal a1 to be coupled with the third switch switching terminal b1 of the third controllable switch S3, so as to tune the first DVB-S / S2 signal through the first S signal tuning unit 513, output the intermediate frequency signal generated by the first S signal tuning unit 513 through the first signal output terminal OUT1, and then demodulate the intermediate frequency signal through the first signal demodulation module 521 to generate a TS stream;

[0366] Then, the display device detects that the first signal input terminal IN1 receives the DVB-T / T2 / C signal, and based on the configuration of the controller 70, enables the second T signal tuning unit 512 to tune the DVB-T / T2 / C signal through the second T signal tuning unit 512, outputs the intermediate frequency signal generated by the second T signal tuning unit 512 through the second signal output terminal OUT2, and then demodulates the intermediate frequency signal through the second signal demodulation module 522 to generate another TS stream.

[0367] The controller 70 can receive the above two TS streams and play and record them respectively, so as to realize one recording and one playing of the DVB-T / T2 / C signal and the DVB-S / S2 signal.

[0368] The frequency locking control process corresponding to mode (1) is as follows:

[0369] Since the broadcast signal demodulated by the first signal demodulation module 521 is the first DVB-S / S2 signal input by the second signal input terminal IN2, frequency locking is required, so the controller 70 can execute the frequency locking control process F1, that is, the controller 70 generates a first frequency locking indication signal and sends it to the first signal demodulation module 521, instructing the first signal demodulation module 521 to generate a first frequency locking signal D11 and feed it back to the second signal input terminal IN2.

[0370] In this way, the first frequency locking signal D11 can be fed back to the corresponding frequency conversion device through the second signal input terminal IN2, so that the frequency conversion device can lock the corresponding frequency point (i.e. the frequency point demodulated by the first signal demodulation module 521, i.e. the frequency point tuned and selected by the first S signal tuning unit 513) in the first DVB-S / S2 signal based on the first frequency locking signal D11, so as to ensure that the DVB-S / S2 signal of the corresponding frequency point can be stably input to the display device through the second signal input terminal IN2, and then be tuned and selected by the first S signal tuning unit 513 and demodulated by the first signal demodulation module 521, so as to realize the frequency locking control of the DVB-S / S2 signal in mode (1).

[0371] For mode (2), referring to FIG. 20, the broadcast signal input and processing process of the display device is as follows:

[0372] The display device first detects that the first signal input terminal IN1 receives the DVB-T / T2 / C signal, and then configures the first T signal tuning unit 511 to tune the DVB-T / T2 / C signal through the controller 70, generates an intermediate frequency signal through the first signal output terminal OUT1, and then demodulates the intermediate frequency signal through the first signal demodulation module 521 to generate a TS stream.

[0373] Then, the display device detects that the second signal input terminal IN2 receives the first DVB-S / S2 signal, and sends a first indication signal k1 to the third controllable switch S3 through the controller 70, so that the third switch common terminal a1 is coupled with the third switch switching terminal b2, so that the first DVB-S / S2 signal is tuned through the second S signal tuning unit 514, and the intermediate frequency signal is output through the second signal output terminal OUT2, and then demodulated through the second signal demodulation module 522 to generate another TS stream.

[0374] The controller 70 can receive the above two TS streams and play and record them respectively to realize one recording and one playing of the DVB-T / T2 / C signal and the DVB-S / S2 signal.

[0375] The frequency locking control process corresponding to mode (2) is as follows:

[0376] Since the broadcast signal demodulated by the second signal demodulation module 522 is the first DVB-S / S2 signal input by the second signal input terminal IN2, frequency locking is required, so the controller 70 can execute the frequency locking control process F3, that is, the controller 70 generates a first frequency locking indication signal and sends it to the first signal demodulation module 521, instructing the first signal demodulation module 521 to generate a first frequency locking signal D12 and feed it back to the second signal input terminal IN2.

[0377] In this way, the controller 70 controls to realize feedback of the first frequency locking signal D12 to the second signal input terminal IN2 through the first feedback path L1, and the first frequency locking signal D12 is generated by the first signal demodulation module 521 and is used to lock the frequency point of the signal demodulated by the second signal demodulation module 522. Correspondingly, the frequency conversion device can lock the corresponding frequency point (i.e. the frequency point demodulated by the second signal demodulation module 522, i.e. the frequency point tuned and selected by the second S signal tuning unit 514) in the first DVB-S / S2 signal based on the first frequency locking signal D12, to ensure that the DVB-S / S2 signal of the corresponding frequency point can be stably input to the display device through the second signal input terminal IN2, and then demodulated by the second S signal tuning unit 514 and the second signal demodulation module 522 to realize frequency locking control of the DVB-S / S2 signal in mode (2).

[0378] For mode (3), referring to Fig. 21, the broadcast signal input and processing process of the display device is as follows:

[0379] For the first DVB-S / S2 signal input by the second signal input end IN2, the display device sends a first instruction signal k1 to the third controllable switch S3 through the controller 70, so that the third switch common end a1 of the third controllable switch S3 is coupled with the third switch switching end b1, so that the first DVB-S / S2 signal is tuned by the first S signal tuning unit 513, the generated intermediate frequency signal is output through the first signal output end OUT1, and then is demodulated by the first signal demodulation module 521 to generate a TS stream.

[0380] For the second DVB-S / S2 signal input by the third signal input end IN3, the display device outputs a first instruction signal k1 to the fourth controllable switch S4 through the controller 70, so that the fourth switch common end a2 of the fourth controllable switch S4 is coupled with the fourth switch switching end b4, so that the second DVB-S / S2 signal is tuned by the second S signal tuning unit 514, the generated intermediate frequency signal is output through the second output end OUT2, and then is demodulated by the second signal demodulation module 522 to generate another TS stream.

[0381] The controller 70 can receive the above two TS streams and play and record them respectively to realize one recording and one playing of the two DVB-S / S2 signals.

[0382] The frequency locking control process corresponding to mode (3) is as follows:

[0383] Since the broadcast signal demodulated by the first signal demodulation module 521 is the first DVB-S / S2 signal input by the second signal input end IN2, frequency locking is required, so the controller 70 can execute the frequency locking control process F1; and since the broadcast signal demodulated by the second signal demodulation module 522 is the second DVB-S / S2 signal input by the third signal input end IN3, frequency locking is required, so the controller 70 can execute the frequency locking control process F2.

[0384] That is, the controller 70 can generate the first and second frequency locking indication signals based on the two frequency points to be locked by the two demodulation modules, and send the first and second frequency locking indication signals to the first and second signal demodulation modules 521 and 522 respectively, to instruct the first and second signal demodulation modules 521 and 522 to generate the first and second frequency locking signals for locking the frequency points demodulated by the first and second signal demodulation modules 521 and 522 respectively, and feed back to the corresponding signal input ends: the first signal demodulation module 521 generates the first frequency locking signal D11 for locking the frequency point demodulated by the first signal demodulation module 521, and feeds back to the second signal input end IN2, and the second signal demodulation module 522 generates the second frequency locking signal D21 for locking the frequency point demodulated by the second signal demodulation module 522, and feeds back to the third signal input end IN3, thereby realizing the locking control of the corresponding frequency points in the two DVB-S / S2 signals received by the two signal input ends in mode (3).

[0385] For mode (4), referring to FIG. 22, the broadcast signal input and processing process of the display device is as follows:

[0386] The display device detects that the first DVB-S / S2 signal under the Unicable standard is received by the second signal input end IN2, and sends the first indication signal k1 to the third controllable switch S3 through the controller 70, so that the third switch common end a1 of the third controllable switch S3 is coupled with the two third switch switching ends b1 and b2 respectively, and the first DVB-S / S2 signal is input into the first S signal tuning unit 513 and the second S signal tuning unit 514 for tuning respectively;

[0387] The intermediate frequency signal generated by the first S signal tuning unit 513 is output through the first signal output end OUT1, and then demodulated by the first signal demodulation module 521 to generate a TS stream;

[0388] The intermediate frequency signal generated by the second S signal tuning unit 514 is output through the second signal output end OUT2, and then demodulated by the second signal demodulation module 522 to generate another TS stream;

[0389] The controller 70 can receive the above two TS streams and play and record them respectively, to realize one recording and one playing of the DVB-S / S2 signal under the Unicable standard.

[0390] The corresponding frequency locking control process of mode (4) is as follows:

[0391] Since the broadcast signal demodulated by the first signal demodulation module 521 is the first DVB-S / S2 signal input by the second signal input terminal IN2, frequency locking is required, and thus the controller 70 can execute the frequency locking control flow F1. Since the broadcast signal demodulated by the second signal demodulation module 522 is also the first DVB-S / S2 signal input by the second signal input terminal IN2, frequency locking is required, and thus the controller 70 can execute the frequency locking control flow F3.

[0392] That is, the controller 70 can generate two first frequency locking indication signals based on the two frequency points to be locked by the two demodulation modules, and send the two first frequency locking indication signals to the first signal demodulation module 521, to instruct the first signal demodulation module 521 to generate two first frequency locking signals, i.e., the first frequency locking signal D11 for locking the frequency point demodulated by the first signal demodulation module 521, and the first frequency locking signal D12 for locking the frequency point demodulated by the second signal demodulation module 522. The first frequency locking signal D11 and the first frequency locking signal D12 are fed back to the second signal input terminal IN2 through the corresponding first feedback path L1 of the first signal demodulation module 521, so as to realize the frequency locking control of the two frequency points in the DVB-S / S2 signal under the Unicable standard in mode (4).

[0393] It should be noted that in some embodiments, in mode (4) described above, the controller 70 can also generate one first frequency locking indication signal based on the two frequency points to be locked by the two demodulation modules. The first frequency locking indication signal can contain two kinds of indication information at the same time, which can instruct the first signal demodulation module 521 to generate the first frequency locking signals D11 and D12, respectively.

[0394] Similar to mode (4) described above, for mode (6), i.e., the second DVB-S / S2 signal under the Unicable standard is input into the display device through the third signal input terminal IN3, the controller 70 sends the first indication signal k1 to the fourth controllable switch S4, so that the DVB-S / S2 signal is tuned by the first S signal tuning unit 513 and the second S signal tuning unit 514, respectively, and the intermediate frequency signals generated by the two tuning units are demodulated by the first signal demodulation module 521 and the second signal demodulation module 522, respectively, to generate two TS streams. The controller 70 can realize the frequency locking control of the two frequency points in the DVB-S / S2 signal input through the third signal input terminal IN3 and demodulated by the two demodulation modules based on the frequency locking control flows F4 and F2 described above.

[0395] It can be seen that the display device can realize any one of modes (1) to (6) described above, to ensure the input path selection, tuning, demodulation, etc. of the broadcast signal input through any signal input terminal, to obtain one or two TS streams, and to realize one recording and one broadcasting.

[0396] In modes (2) and (4), the first DVB-S / S2 signal demodulated by the second signal demodulation module 522 is input from the second signal input terminal IN2, and thus the frequency-locked signal for locking the corresponding frequency point cannot be fed back through the second feedback path L2 corresponding to the second signal demodulation module 522. In this case, the controller 70 can execute the frequency-locked control flow F3 to send a first frequency-locked instruction signal to the first signal demodulation module 521, instructing the first signal demodulation module 521 to generate the corresponding first frequency-locked signal D12, which is fed back to the second signal input terminal IN2 through the first feedback path L1, so that accurate locking of the corresponding frequency point in the first DVB-S / S2 signal demodulated by the second signal demodulation module 522 can be achieved.

[0397] In addition, in mode (6), the second DVB-S / S2 signal demodulated by the first signal demodulation module 521 is input from the third signal input terminal IN3, and thus the frequency-locked signal for locking the corresponding frequency point cannot be fed back through the first feedback path L1 corresponding to the first signal demodulation module 521. In this case, the controller 70 can execute the frequency-locked control flow F4 to send a second frequency-locked instruction signal to the second signal demodulation module 522, instructing the second signal demodulation module 522 to generate the corresponding second frequency-locked signal D22, which is fed back to the third signal input terminal IN3 through the second feedback path L2, so that accurate locking of the corresponding frequency point in the second DVB-S / S2 signal demodulated by the first signal demodulation module 521 can be achieved.

[0398] In some embodiments, the mainboard of the display device can further integrate a receiving terminal. The receiving terminal has at least one cable interface and at least one wiring pin coupled to the at least one cable interface.

[0399] For example, the receiving terminal 60 is shown in FIG. 23. The receiving terminal 60 can be coupled to a coaxial cable transmitting broadcast signals through a cable interface.

[0400] Referring to FIG. 23, the receiving terminal 60 has three cable interfaces, namely one bayonet interface 61 and two threaded interfaces 62 and 63.

[0401] The bayonet interface 61 can serve as a receiving port of DVB-T / T2 / C signals and be coupled to one end of a coaxial cable under a conventional standard or a new standard, and the other end of the coaxial cable can be coupled to a ground antenna.

[0402] The threaded interfaces 62 and 63 can serve as a main receiving port and an auxiliary receiving port of DVB-S / S2 signals, respectively, and be coupled to one end of a coaxial cable under a conventional standard or a new standard, and the other end of the coaxial cable can be coupled to a satellite antenna.

[0403] The receiving terminal 60 is coupled with the corresponding signal input terminal in the input path selection module 51 through the wire pin.

[0404] For example, Fig. 23 shows that the receiving terminal 60 has three wire pins, i.e. the T pin coupled with the bayonet interface 61, the main S pin coupled with the threaded interface 62, and the auxiliary S pin coupled with the threaded interface 63.

[0405] The receiving terminal 60 is configured to receive the broadcast signal transmitted by the coaxial cable through the cable interface, and transmit the broadcast signal to the corresponding signal input terminal through the corresponding wire pin.

[0406] The receiving terminal 60 is coupled with the first signal input port IN1 of the input path selection module 51 through the T pin, can receive the DVB-T / T2 / C signal transmitted by the coaxial cable coupled with the bayonet interface 61 through the bayonet interface 61, and transmit the DVB-T / T2 / C signal to the first signal input port IN1 through the T pin, so that the DVB-T / T2 / C signal is input into the input path selection module 51 by the first signal input port IN1.

[0407] The receiving terminal 60 is coupled with the second signal input port IN2 of the input path selection module 51 through the main S pin, can receive the DVB-S / S2 signal transmitted by the coaxial cable coupled with the threaded interface 62 through the threaded interface 62, and transmit the DVB-S / S2 signal to the second signal input port IN2 through the main S pin, so that the DVB-S / S2 signal is input into the input path selection module 51 by the second signal input port IN2.

[0408] The receiving terminal 60 is coupled with the third signal input port IN3 of the input path selection module 51 through the auxiliary S pin, can receive the DVB-S / S2 signal transmitted by the coaxial cable coupled with the threaded interface 63 through the threaded interface 63, and transmit the DVB-S / S2 signal to the third signal input port IN3 through the auxiliary S pin, so that the DVB-S / S2 signal is input into the input path selection module 51 by the third signal input port IN3.

[0409] The user connects different coaxial cables with different cable interfaces, and the display device works in different modes to meet the different needs of the user.

[0410] For example, if the user first connects the coaxial cable transmitting the DVB-S / S2 signal with the threaded interface 62, and then connects the coaxial cable transmitting the DVB-T / T2 / C signal with the bayonet interface 61, the display device works in mode (1).

[0411] If the user first connects the coaxial cable transmitting the DVB-T / T2 / C signal to the bayonet interface 61, and then connects the coaxial cable transmitting the DVB-S / S2 signal to the threaded interface 62, the display device works in mode (2).

[0412] If the user connects the two coaxial cables transmitting the DVB-S / S2 signal to the threaded interfaces 62 and 63 respectively, the display device works in mode (3).

[0413] If the user connects the coaxial cable transmitting the DVB-S / S2 signal based on the Unicable standard to the threaded interface 62, the display device works in mode (4).

[0414] If the user connects the coaxial cable transmitting the DVB-T / T2 / C signal to the bayonet interface 61, the display device works in mode (5).

[0415] It should be noted that the receiving terminal 60 corresponds to the terminal in some of the foregoing embodiments and the accompanying drawings (such as Figures 5, 6, etc.), the bayonet interface 61 corresponds to the second input port 251b in some of the foregoing embodiments, and the two threaded interfaces 62 and 63 correspond to the first input port 251a in some of the foregoing embodiments.

[0416] In some embodiments, to improve the quality of the received broadcast signal, the mainboard can further integrate a filter and direct current isolation circuit and a low noise amplifier (i.e., LNA).

[0417] The filter and direct current isolation circuit is configured to filter the broadcast signal and isolate the direct current interference signal.

[0418] The low noise amplifier is configured to amplify the broadcast signal.

[0419] For example, as shown in Figure 23, between each wiring pin of the wiring terminal 60 and the corresponding signal input end, a filter and direct current isolation circuit and a low noise amplifier are respectively arranged.

[0420] For example, the input end of the first filter and direct current isolation circuit 541 is coupled to the T pin of the wiring terminal 60, the output end of the first filter and direct current isolation circuit 541 is coupled to the input end of the first low noise amplifier 551, and the output end of the first low noise amplifier 551 is coupled to the first signal input end IN1.

[0421] In this way, the DVB-T / T2 / C signal output by the T pin can first pass through the first filter and direct current isolation circuit 541 to filter out the direct current interference signal, and then pass through the first low noise amplifier 551 for amplification, so that the broadcast signal received by the first signal input end IN1 is the filtered and amplified DVB-T / T2 / C signal, and the signal quality is improved.

[0422] For example, the input end of the second filter and direct current isolation circuit 542 is coupled with the main S pin of the terminal 60, the output end of the second filter and direct current isolation circuit 542 is coupled with the input end of the second low noise amplifier 552, and the output end of the second low noise amplifier 552 is coupled with the second signal input end IN2.

[0423] In this way, the DVB-S / S2 signal output by the main S pin can be filtered of the direct current interference signal by the second filter and direct current isolation circuit 542 and then amplified by the second low noise amplifier 552, so that the broadcast signal received by the second signal input end IN2 is the filtered and amplified DVB-S / S2 signal, and the signal quality is improved.

[0424] For example, the input end of the third filter and direct current isolation circuit 543 is coupled with the auxiliary S pin of the terminal 60, the output end of the third filter and direct current isolation circuit 543 is coupled with the input end of the third low noise amplifier 553, and the output end of the third low noise amplifier 553 is coupled with the third signal input end IN3.

[0425] In this way, the DVB-S / S2 signal output by the auxiliary S pin can be filtered of the direct current interference signal by the third filter and direct current isolation circuit 543 and then amplified by the third low noise amplifier 553, so that the broadcast signal received by the third signal input end IN3 is the filtered and amplified DVB-S / S2 signal, and the signal quality is improved.

[0426] In some embodiments, the first low noise amplifier 551 can be further integrated with the first T signal tuning unit 511 and the second T signal tuning unit 512 in the input path selection module 51 into a T signal tuning chip (i.e., a Tuner chip); correspondingly, the second low noise amplifier 552 and the third low noise amplifier 553 can be further integrated with the third controllable switch S3, the fourth controllable switch S4, the first S signal tuning unit 513, and the second S signal tuning unit 514 in the input path selection module 51 into an S signal tuning chip.

[0427] That is, by arranging two Tuner chips (one T signal tuning chip and one S signal tuning chip) in the display device, the modes (1)-(6) described above can be realized. Integrating the related components can simplify the circuit board wiring of the display device and improve the preparation yield and efficiency of the circuit board, thereby improving the preparation yield and efficiency of the display device.

[0428] Referring to FIG. 24, in some embodiments, a display device is also provided, which is provided with an input path selection module 51, a first signal demodulation module 521 and a second signal demodulation module 522. Some configurations of the input path selection module 51, the first signal demodulation module 521 and the second signal demodulation module 522 can refer to the display device shown in FIG. 17, and the same parts will not be described again. Hereinafter, the differences between the display device shown in FIG. 24 and FIG. 17 will be described.

[0429] Different from FIG. 17, the display device shown in FIG. 24 is provided with a feedback module 53. The input ends of the feedback module 53 are coupled with the first signal demodulation module 521 and the second signal demodulation module 522 respectively, and the output ends of the feedback module 53 are coupled with the second signal input end IN2 and the third signal input end IN3 respectively.

[0430] The feedback module 53 is configured to, in response to a feedback indication signal sent by the controller 70, couple at least one of the first signal demodulation module 521 and the second signal demodulation module 522 with at least one of the second signal input end IN2 and the third signal input end IN3, so as to feedback the first frequency-locked signal generated by the first signal demodulation module 521 or the second frequency-locked signal generated by the second signal demodulation module 522.

[0431] In some embodiments, as shown in FIG. 24, the feedback module 53 can be configured with only one feedback input end, and both of the demodulation modules 521 and 522 are coupled with the feedback input end, so that the frequency-locked signals generated by both of the demodulation modules 521 and 522 are input into the feedback module 53 through the feedback input end, and the feedback module 53 feeds back each frequency-locked signal to IN2 or IN3.

[0432] For example, in the case that the broadcast signals demodulated by the two demodulation modules are both satellite broadcast signals, in order to distinguish the two frequency-locked signals generated by the two demodulation modules, the frequency-locked signals generated by different demodulation modules can be sent to the feedback module 53 at different times under the indication of the controller 70, and the feedback module 53 can be coupled with the corresponding signal input end IN2 or IN3 at different times under the indication of the feedback indication signal, so as to feedback the frequency-locked signal sent at the corresponding time to the corresponding signal input end.

[0433] In other embodiments, the frequency-locked signals can carry identification information, which can identify different demodulation modules or different signal input ends, so as to distinguish different frequency-locked signals input by the same feedback input end and accurately feedback.

[0434] In some embodiments, as shown in FIG. 24, the feedback module 53 can be configured with only one feedback output, and both the second signal input IN2 and the third signal input IN3 are coupled to the feedback output, so that the frequency-locked signals to be fed back to the second signal input IN2 and the third signal input IN3 are output by the feedback output.

[0435] For example, in the case that the feedback module 53 is configured with only one feedback output, any frequency-locked signal can be fed back to the second signal input IN2 and the third signal input IN3 respectively, and the above-mentioned identification information can be carried in the frequency-locked signal. The frequency conversion device (e.g., the Unicable device described above) coupled to the second signal input IN2 and the third signal input IN3 respectively can determine whether to respond to the frequency-locked signal according to the identification information in the frequency-locked signal, and if no response is needed, the frequency-locked signal can be ignored.

[0436] For example, the frequency-locked signal for locking the corresponding frequency point in the first satellite broadcast signal is fed back to IN2 and IN3 at the same time. The frequency conversion device coupled to IN2 can determine that the frequency-locked signal needs to be responded to according to the identification information, and then respond to lock the corresponding frequency point in the first satellite broadcast signal. The frequency conversion device coupled to IN3 can determine that the frequency-locked signal does not need to be responded to according to the identification information, and directly ignore the frequency-locked signal.

[0437] In some embodiments, in the case that the feedback module 53 is configured with only one feedback input and one feedback output, based on time-sharing control, identification information, etc., multiple different feedback paths can be formed between the feedback input and the feedback output. Under the indication of different feedback indication signals, the feedback module can select different feedback paths, so that the frequency-locked signal sent by any demodulation module can be fed back to any one of the second signal input IN2 and the third signal input IN3.

[0438] For example, a third feedback path L3 is provided between the feedback input and the feedback output of the feedback module 53. In the case that the second signal demodulation module 522 demodulates the first satellite broadcast signal received through the second signal input IN2, the controller 70 can send a third feedback indication signal to the feedback module 53, and the feedback module 53 selects the third feedback path L3 in response to the third feedback indication signal, so as to couple the second signal demodulation module 522 to the second signal input IN2, and feed back the second frequency-locked signal generated by the second signal demodulation module 522 to the second signal input IN2.

[0439] Exemplarily, the feedback module 53 is provided with a fourth feedback path L4 between the feedback input end and the feedback output end; in a case that the first signal demodulation module 521 demodulates the second satellite broadcast signal received through the third signal input end IN3, the controller 70 can send a fourth feedback instruction signal to the feedback module 53, and the feedback module 53, in response to the fourth feedback instruction signal, selects the fourth feedback path L4, so as to couple the first signal demodulation module 521 with the third signal input end IN3, and feed back the first frequency-locked signal generated by the first signal demodulation module 521 to the third signal input end IN3.

[0440] Exemplarily, the feedback module 53 can be further provided with a first feedback path L1, a second feedback path L2, etc. between the feedback input end and the feedback output end; when the first feedback path L1 is selected, the first signal demodulation module 521 can be coupled with the second signal input end IN2, and the first frequency-locked signal generated by the first signal demodulation module 521 can be fed back to the second signal input end IN2; when the second feedback path L2 is selected, the second signal demodulation module 522 can be coupled with the third signal input end IN3, and the second frequency-locked signal generated by the second signal demodulation module 522 can be fed back to the third signal input end IN3.

[0441] In some embodiments, as shown in FIG. 25, the feedback module 53 can be configured with two feedback input ends; wherein the first feedback input end is coupled with the first signal demodulation module 521, and the second feedback input end is coupled with the second signal demodulation module 522.

[0442] In some embodiments, as shown in FIG. 25, the feedback module 53 can be configured with two feedback output ends; wherein the first feedback output end is coupled with the second signal input end IN2, and the second feedback output end is coupled with the third signal input end IN3.

[0443] In the feedback module 53 shown in FIG. 25, different feedback paths are provided between different feedback input ends and different feedback output ends.

[0444] Referring to FIG. 25, in different embodiments, the feedback module 53 can select at least one of the following feedback paths:

[0445] The first feedback path L1 is provided between the first signal demodulation module 521 and the second signal input end IN2; when the first feedback path L1 is selected, the first signal demodulation module 521 is coupled with the second signal input end IN2, and the first frequency-locked signal generated by the first signal demodulation module 521 can be fed back to the second signal input end IN2;

[0446] The second feedback path L2 is arranged between the second signal demodulation module 522 and the third signal input terminal IN3. When the second feedback path L2 is selected, the second signal demodulation module 522 is coupled to the third signal input terminal IN3, and the second frequency-locked signal generated by the second signal demodulation module 522 can be fed back to the third signal input terminal IN3.

[0447] The third feedback path L3 is arranged between the second signal demodulation module 522 and the second signal input terminal IN2. When the third feedback path L3 is selected, the second signal demodulation module 522 is coupled to the second signal input terminal IN2, and the second frequency-locked signal can be fed back to the second signal input terminal IN2.

[0448] The fourth feedback path L4 is arranged between the first signal demodulation module 521 and the third signal input terminal IN3. When the fourth feedback path L4 is selected, the first signal demodulation module 521 is coupled to the third signal input terminal IN3, and the first frequency-locked signal can be fed back to the third signal input terminal IN3.

[0449] It should be noted that the feedback module 53 can implement the above four feedback paths in different ways, and is not limited to the implementations shown in FIGS. 24 and 25.

[0450] In some embodiments, the controller 70 is configured not only to receive the TS stream output by each demodulation module and to perform play control or record control, but also to:

[0451] In the case where the second signal demodulation module 522 demodulates the first satellite broadcast signal received through the second signal input terminal IN2, a second frequency-locked indication signal is generated and sent to the second signal demodulation module 522 to instruct the second signal demodulation module 522 to generate a second frequency-locked signal;

[0452] In addition, a third feedback indication signal is generated and sent to the feedback module 53 to instruct the feedback module 53 to select the third feedback path L3, so that the second signal demodulation module 522 is coupled to the second signal input terminal IN2, and thus the second frequency-locked signal can be fed back to the second signal input terminal IN2.

[0453] In the above case, the controller 70 instructs the second signal demodulation module 522 to generate a second frequency-locked signal on the one hand, and instructs the feedback module 53 to select the third feedback path L3 on the other hand, so that the second frequency-locked signal is fed back to the second signal input terminal IN2 through the third feedback path L3, thereby achieving the locking of the corresponding frequency point in the first satellite broadcast signal demodulated by the second signal demodulation module 522, i.e., achieving the accurate locking of the frequency point demodulated by the second signal demodulation module 522 in the modes (2) and (4) described above.

[0454] In some embodiments, the controller 70 can be configured to:

[0455] In the case that the first signal demodulation module 521 demodulates the second satellite broadcast signal received through the third signal input terminal IN3, the controller 70 generates and transmits a first frequency-locked indication signal to the first signal demodulation module 521 to instruct the first signal demodulation module 521 to generate the first frequency-locked signal;

[0456] In addition, the controller 70 generates and transmits a fourth feedback indication signal to the feedback module 53 to instruct the feedback module 53 to switch on the fourth feedback path L4, so that the first signal demodulation module 521 is coupled with the third signal input terminal IN3, and thus the first frequency-locked signal can be fed back to the third signal input terminal IN3.

[0457] In the above case, the controller 70 instructs the first signal demodulation module 521 to generate the first frequency-locked signal on one hand, and instructs the feedback module 53 to switch on the fourth feedback path L4 on the other hand, so that the first frequency-locked signal is fed back to the third signal input terminal IN3 through the fourth feedback path L4, thereby realizing the locking of the corresponding frequency point in the second satellite broadcast signal demodulated by the first signal demodulation module 521, that is, realizing the accurate locking of the frequency point demodulated by the first signal demodulation module 521 in the mode (6) described above.

[0458] In some other embodiments, the controller 70 can also instruct the feedback module 53 to switch on the first feedback path L1 by transmitting a first feedback indication signal, so that the first frequency-locked signal generated by the first signal demodulation module 521 can be fed back to the second signal input terminal IN2, for example, realizing the accurate locking of the frequency point demodulated by the first signal demodulation module 521 in the modes (1), (3) and (4) described above.

[0459] In some other embodiments, the controller 70 can also instruct the feedback module 53 to switch on the second feedback path L2 by transmitting a second feedback indication signal, so that the second frequency-locked signal generated by the second signal demodulation module 522 can be fed back to the third signal input terminal IN3, for example, realizing the accurate locking of the frequency point demodulated by the second signal demodulation module 522 in the modes (3) and (6) described above.

[0460] It should be noted that the feedback indication signals generated by the controller 70, including the first feedback indication signal, the second feedback indication signal, the third feedback indication signal, the fourth feedback indication signal, etc., can correspond to the second indication signal k2 in some embodiments described above, and the related embodiments can be mutually referred to.

[0461] As mentioned above, based on only the first feedback path L1 and the second feedback path L2, the working mode of the display device is limited, for example, the modes (2) and (4) mentioned above cannot be realized, i.e., the first frequency-locked signal generated by the first signal demodulation module 521 cannot be fed back to the third signal input terminal IN3.

[0462] To this end, unlike the solution of the display device shown in FIG. 17, the display device shown in FIG. 24 provides a solution of providing a feedback module 53, and providing more feedback paths including L1 and L2 through the feedback module 53, so that one or more feedback paths can be selected as needed to meet the feedback requirements of the frequency-locked signal in different cases; correspondingly, the controller 70 is configured to generate different feedback indication signals according to different modes, and control the feedback module 53 to select the feedback path required in the corresponding mode through different feedback indication signals.

[0463] As can be seen, the display device shown in FIG. 24 is provided with a feedback module 53 having multiple feedback paths, and the feedback module 53 can select different feedback paths according to the control of the controller 70 in different cases to meet the feedback requirements of the frequency-locked signal; as to which demodulated satellite broadcast signal of the demodulation module needs to be locked, the controller 70 sends the frequency-locked indication signal to the corresponding demodulation module, and there is no need to adjust the sending destination of the frequency-locked indication signal according to the feedback destination of the frequency-locked signal, so that one demodulation module does not need to replace another demodulation module to generate the frequency-locked signal, and the generation and feedback time of the frequency-locked signal will not be increased due to the replacement of the demodulation module for generating the frequency-locked signal in the sleep or unpowered state. Therefore, the display device shown in FIG. 24 can improve the response speed of the frequency-locked control process and provide a smoother operation experience for the user.

[0464] FIGS. 26 and 27 respectively show different implementations of the feedback module 53 providing multiple feedback paths, which will be described in detail below.

[0465] In some embodiments, as shown in FIG. 26, the feedback module 53 includes a first feedback switch SW1. The first feedback switch SW1 is provided with:

[0466] a first end c1 coupled to the second signal input terminal IN2;

[0467] a second end c2 coupled to the second signal demodulation module 522;

[0468] a third end c3 coupled to the first signal demodulation module 521.

[0469] The first feedback switch SW1 is equivalent to a single-pole double-throw switch, and the common terminal is the first terminal cl, and the two switching terminals are the second terminal c2 and the third terminal c3. The first feedback switch SW1 switches the connection mode between the common terminal and the two switching terminals in response to different feedback indication signals sent by the controller 70, as follows:

[0470] In response to the third feedback indication signal, the first feedback switch SW1 can couple the first terminal cl (common terminal) with the second terminal c2, so that the feedback module 53 selects the third feedback path L3 described above, so that the second signal demodulation module 522 is coupled with the second signal input terminal IN2, and the second frequency-locked signal generated by the second signal demodulation module 522 is fed back to IN2;

[0471] Alternatively, in response to the first feedback indication signal, the first feedback switch SW1 can couple the first terminal cl (common terminal) with the third terminal c3, so that the feedback module 53 selects the first feedback path L1 described above, so that the first signal demodulation module 521 is coupled with the second signal input terminal IN2, and the first frequency-locked signal generated by the first signal demodulation module 521 is fed back to IN2.

[0472] That is, by controlling the first feedback switch SW1 through the controller 70, the feedback module 53 can select the first feedback path L1 or the third feedback path L3, and then feed back the first frequency-locked signal generated by the first signal demodulation module 521 or the second frequency-locked signal generated by the second signal demodulation module 522 to the second signal input terminal IN2.

[0473] In some embodiments, the feedback module 53 can directly couple the second signal demodulation module 522 with the third signal input terminal IN3 in the case of being provided with the first feedback switch SW1, so that the feedback module 53 has the second feedback path L2, and the second frequency-locked signal generated by the second signal demodulation module 522 is fed back to IN3.

[0474] In some embodiments, as shown in FIG. 26, the feedback module 53 can include a second feedback switch SW2. The second feedback switch SW2 is provided with:

[0475] The fourth terminal c4 is coupled with the third signal input terminal IN3;

[0476] The fifth terminal c5 is coupled with the first signal demodulation module 521;

[0477] The sixth terminal c6 is coupled with the second signal demodulation module 522.

[0478] The second feedback switch SW2 also corresponds to a single-pole double-throw switch, and the common terminal is the fourth terminal c4, and the two switching terminals are the fifth terminal c5 and the sixth terminal c6. The second feedback switch SW2 switches the connection mode between the common terminal and the two switching terminals in response to different feedback indication signals sent by the controller, and the specific mode is as follows:

[0479] In response to the fourth feedback indication signal, the second feedback switch SW2 can couple the fourth terminal c4 (common terminal) with the fifth terminal c5, so that the feedback module 53 selects the fourth feedback path L4, so that the first signal demodulation module 521 is coupled with the third signal input terminal IN3, and the first frequency-locked signal generated by the first signal demodulation module 521 is fed back to IN3.

[0480] Alternatively, in response to the second feedback indication signal, the second feedback switch SW2 can couple the fourth terminal c4 (common terminal) with the sixth terminal c6, so that the feedback module 53 selects the second feedback path L2, so that the second signal demodulation module 522 is coupled with the third signal input terminal IN3, and the second frequency-locked signal generated by the second signal demodulation module 522 is fed back to IN3.

[0481] That is, by controlling the second feedback switch SW2 by the controller 70, the feedback module 53 can select the second feedback path L2 or the fourth feedback path L4, and then the first frequency-locked signal generated by the first signal demodulation module 521 or the second frequency-locked signal generated by the second signal demodulation module 522 is fed back to the third signal input terminal IN3.

[0482] In some embodiments, the feedback module 53 can directly couple the first signal demodulation module 521 with the second signal input terminal IN2 in the case of being provided with the second feedback switch SW2, so that the feedback module 53 has the first feedback path L1, and the first frequency-locked signal generated by the first signal demodulation module 521 is fed back to IN2.

[0483] In some embodiments, the feedback module 53 can simultaneously set the first feedback switch SW1 and the second feedback switch SW2, so that the feedback module 53 can select at least one of the above feedback paths L1-L4 as needed to meet the frequency-locked signal feedback requirements in different modes.

[0484] In some embodiments, as shown in FIG. 27, the feedback module 53 can include a third feedback switch SW3. The third feedback switch SW3 is provided with:

[0485] The first terminal d1 is coupled with the second signal demodulation module 522;

[0486] The second terminal d2 is coupled with the second signal input terminal IN2;

[0487] The third end d3 is coupled with the third signal input end IN3.

[0488] The third feedback switch SW3 is equivalent to a single-pole double-throw switch, and the common end is the first end d1, and the two switching ends are the second end d2 and the third end d3. The third feedback switch SW3 switches the connection mode between the common end and the two switching ends in response to different feedback indication signals sent by the controller 70, as follows:

[0489] In response to the third feedback indication signal, the third feedback switch SW3 can couple the first end d1 (common end) with the second end d2, so that the feedback module 53 selects the third feedback path L3, and the second signal demodulation module 522 is coupled with the second signal input end IN2, so as to realize the feedback of the second frequency-locked signal generated by the second signal demodulation module 522 to IN2.

[0490] Alternatively, in response to the second feedback indication signal, the third feedback switch SW3 can couple the first end d1 (common end) with the third end d3, so that the feedback module 53 selects the second feedback path L2, and the second signal demodulation module 522 is coupled with the third signal input end IN3, so as to realize the feedback of the second frequency-locked signal generated by the second signal demodulation module 522 to IN3.

[0491] That is, by controlling the third feedback switch SW3 through the controller 70, the feedback module 53 can select the third feedback path L3 or the second feedback path L2, and then realize the feedback of the second frequency-locked signal generated by the second signal demodulation module 522 to IN2 or IN3.

[0492] In some embodiments, the feedback module 53 can directly couple the first signal demodulation module 521 with the second signal input end IN2 in the case of being provided with the third feedback switch SW3, so that the feedback module 53 has the first feedback path L1, and the feedback of the first frequency-locked signal generated by the first signal demodulation module 521 to IN2 can be realized.

[0493] In some embodiments, as shown in FIG. 27, the feedback module 53 can include a fourth feedback switch SW4. The fourth feedback switch SW4 is provided with:

[0494] The fourth end d4 is coupled with the first signal demodulation module 521;

[0495] The fifth end d5 is coupled with the third signal input end IN3;

[0496] The sixth end d6 is coupled with the second signal input end IN2.

[0497] The fourth feedback switch SW4 is also equivalent to a single-pole double-throw switch, and the common terminal is the fourth terminal d4, and the two switching terminals are the fifth terminal d5 and the sixth terminal d6. The fourth feedback switch SW4 switches the connection mode between the common terminal and the two switching terminals in response to different feedback indication signals sent by the controller 70, and the specific switching mode is as follows:

[0498] In response to the fourth feedback indication signal, the fourth feedback switch SW4 can couple the fourth terminal d4 (common terminal) with the fifth terminal d5, so that the feedback module 53 selects the first feedback path L1, so that the first signal demodulation module 521 is coupled with the second signal input terminal IN2, and the first frequency-locked signal generated by the first signal demodulation module 521 is fed back to IN2.

[0499] Alternatively, in response to the first feedback indication signal, the fourth feedback switch SW4 can couple the fourth terminal d4 (common terminal) with the sixth terminal d6, so that the feedback module 53 selects the fourth feedback path L4, so that the first signal demodulation module 521 is coupled with the third signal input terminal IN3, and the first frequency-locked signal generated by the first signal demodulation module 521 is fed back to IN3.

[0500] That is, by controlling the fourth feedback switch SW4 through the controller 70, the feedback module 53 can select the first feedback path L1 or the fourth feedback path L4, and then the first frequency-locked signal generated by the first signal demodulation module 521 is fed back to IN2 or IN3.

[0501] In some embodiments, the feedback module 53 can directly couple the second signal demodulation module 522 with the third signal input terminal IN3 in the case of being provided with the fourth feedback switch SW4, so that the feedback module 53 selects the local second feedback path L2, and the second frequency-locked signal generated by the second signal demodulation module 522 is fed back to IN3.

[0502] In some embodiments, the feedback module 53 can be provided with the third feedback switch SW3 and the fourth feedback switch SW4 at the same time, so that the feedback module 53 can select at least one of the above feedback paths L1-L4 according to needs, and realize the frequency-locked signal feedback requirement in different modes.

[0503] The above some embodiments introduce the circuit structure and the corresponding control mode of the feedback module 53 for realizing multiple feedback paths in combination with FIGS. 26 and 27, which provides a hardware basis for the display device to realize multiple working modes. It should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present disclosure.

[0504] In addition, the specific structure of the input path selection module 51 is also shown in FIG. 26 and FIG. 27, including the third controllable switch S3, the fourth controllable switch S4, the first T signal tuning unit 511, the second T signal tuning unit 512, the first S signal tuning unit 513, the second S signal tuning unit 514, etc., which can be used in the display device shown in FIG. 24 or FIG. 25. For details, reference can be made to the foregoing description about FIG. 18 and related embodiments, which will not be repeated here.

[0505] In some embodiments, the display device shown in FIG. 24-FIG. 27 can also be provided with components such as receiving terminals, filter direct current isolation circuits, LNAs, etc., and the related structure can refer to FIG. 23, which will not be repeated here.

[0506] In some embodiments, the input path selection module 51 of the display device can be provided with a second signal input terminal IN2 and a third signal input terminal IN3 for receiving a first DVB-S / S2 signal and a second DVB-S / S2 signal respectively, as shown in FIG. 24-FIG. 25; in combination with the feedback module 53 shown in any one of FIG. 26-FIG. 27, a plurality of working modes can be realized, including but not limited to the above-mentioned modes (3), (4) or (6).

[0507] Among them, for mode (3), that is, in the case that the first DVB-S / S2 signal is received at the second signal input terminal IN2 and the second DVB-S / S2 signal is received at the third signal input terminal IN3, the broadcast signal input and processing process of the display device can refer to FIG. 21 and related embodiments; the frequency locking control process of the display device is as follows:

[0508] The controller 70 generates a first frequency locking indication signal and sends it to the first signal demodulation module 521, instructing the first signal demodulation module 521 to generate a first frequency locking signal;

[0509] The controller 70 generates a second frequency locking indication signal and sends it to the second signal demodulation module 522, instructing the second signal demodulation module 522 to generate a second frequency locking signal;

[0510] The controller 70 generates a first feedback indication signal and a second feedback indication signal and sends them to the feedback module 53, instructing the feedback module 53 to gate the first feedback path L1 and the second feedback path L2, so that the first signal demodulation module 521 is coupled with IN2, the second signal demodulation module 522 is coupled with IN3, the first frequency locking signal is fed back to IN2, and the second frequency locking signal is fed back to IN3, realizing the locking of the corresponding frequency point in the first satellite broadcast signal demodulated by the first signal demodulation module 521 and the locking of the corresponding frequency point in the second satellite broadcast signal demodulated by the second signal demodulation module 522.

[0511] For example, the feedback module 53 adopts the structure shown in FIG. 26. In mode (3), the first feedback indication signal generated by the controller 70 can control the first end cl and the third end c3 of the first feedback switch SW1 to be coupled, and the second feedback indication signal generated by the controller 70 can control the fourth end c4 and the sixth end c6 of the second feedback switch SW2 to be coupled, so that the feedback module 53 selects the first feedback path L1 and the second feedback path L2.

[0512] Similarly, when the feedback module 53 adopts other structures shown in FIG. 27 and the like, the controller 70 can also generate corresponding feedback indication signals to control the feedback module 53 to select the first feedback path L1 and the second feedback path L2, which will not be elaborated one by one here.

[0513] It can be seen that in the case of mode (3), based on the above feedback control of the controller 70, the feedback module 53 can feed back the first frequency-locked signal generated by the first signal demodulation module 521 to IN 2 through the first feedback path L1, so as to realize the locking of the corresponding frequency point in the first DVB-S / S2 signal demodulated by the first signal demodulation module 521; in addition, the feedback module 53 can feed back the second frequency-locked signal generated by the second signal demodulation module 522 to IN 3 through the second feedback path L2, so as to realize the locking of the corresponding frequency point in the second DVB-S / S2 signal demodulated by the second signal demodulation module 522.

[0514] For mode (4), that is, the first DVB-S / S2 signal under the Unicable standard is received by the second signal input end IN2, the broadcast signal input and processing process of the display device can refer to FIG. 22 and the related embodiments; the frequency-locked control process of the display device is as follows:

[0515] The controller 70 generates the first frequency-locked indication signal and sends it to the first signal demodulation module 521 to instruct the first signal demodulation module 521 to generate the first frequency-locked signal;

[0516] The controller 70 generates the second frequency-locked indication signal and sends it to the second signal demodulation module 522 to instruct the second signal demodulation module 522 to generate the second frequency-locked signal;

[0517] The controller 70 generates the first feedback indication signal and the third feedback indication signal and sends them to the feedback module 53 to instruct the feedback module 53 to select the first feedback path L1 and the third feedback path L3, so that the first signal demodulation module 521 and the second signal demodulation module 522 are coupled with IN2 respectively, and the first frequency-locked signal and the second frequency-locked signal are both fed back to IN2, realizing the locking of two different frequency points in the first DVB-S / S2 signal demodulated by the two demodulation modules respectively.

[0518] Exemplarily, the feedback module 53 adopts the structure shown in FIG. 26. In mode (4), the controller 70 can control the first feedback switch SW1 to couple the first end cl with the third end c3 through the first feedback indication signal, so that the feedback module 53 selects the first feedback path L1, thereby feeding back the first frequency-locked signal to IN2. Then, the controller 70 controls the first feedback switch SW1 to couple the first end cl with the second end c2 through the third feedback indication signal, so that the feedback module 53 selects the third feedback path L3, thereby feeding back the second frequency-locked signal to IN2. Of course, the controller 70 can also control the feedback module 53 to select the third feedback path L3 first and then select the first feedback path L1 through the feedback indication signal, to achieve the same control effect, which is not described herein.

[0519] Similarly, when the feedback module 53 adopts other structures shown in FIG. 27 and the like, the controller 70 can also generate corresponding feedback indication signals to control the feedback module 53 to select the first feedback path L1 and the third feedback path L3, which is not described one by one herein.

[0520] It can be seen that, in the case of mode (4), based on the above feedback control of the controller 70, the feedback module 53 can select the first feedback path L1 and the third feedback path L3 respectively, thereby feeding back the first frequency-locked signal generated by the first signal demodulation module 521 and the second frequency-locked signal generated by the second signal demodulation module 522 to IN2, to realize the locking of two different frequency points in the first DVB-S / S2 signal demodulated by the first signal demodulation module 521 and the second signal demodulation module 522 respectively.

[0521] In addition, mode (6) is similar to the above-mentioned mode (4), and the process of implementing mode (6) based on the display device shown in FIG. 24 or FIG. 25 is only briefly described below.

[0522] For mode (6), that is, the third signal input end IN3 receives the second DVB-S / S2 signal under the Unicable standard, the broadcast signal input and processing process of the display device is described in the foregoing embodiments; and the frequency locking control process of the display device is as follows:

[0523] The controller 70 generates a first frequency locking indication signal and sends it to the first signal demodulation module 521, to instruct the first signal demodulation module 521 to generate a first frequency-locked signal;

[0524] The controller 70 generates a second frequency locking indication signal and sends it to the second signal demodulation module 522, to instruct the second signal demodulation module 522 to generate a second frequency-locked signal;

[0525] The controller 70 generates a second feedback indication signal and a fourth feedback indication signal, and sends the signals to the feedback module 53 to instruct the feedback module 53 to switch on the second feedback path L2 and the fourth feedback path L4, so that the first signal demodulation module 521 and the second signal demodulation module 522 are coupled with IN3 respectively, and the first frequency-locked signal and the second frequency-locked signal are both fed back to IN3, thereby realizing the locking of two different frequency points in the second DVB-S / S2 signal demodulated by the two demodulation modules respectively.

[0526] In some embodiments, in addition to IN2 and IN3, the input path selection module 51 can be provided with a first signal input terminal IN1 for receiving a DVB-T / T2 / C signal, as shown in FIGS. 26-27, so that the display device can realize the mode (5) described above, and details can be referred to FIG. 18 and related embodiments, which will not be repeated here.

[0527] In some embodiments, based on the first signal input terminal IN1, in combination with the feedback module 53 in FIGS. 24-27, the display device can realize various working modes, including but not limited to the modes (1), (2) and the like described above.

[0528] For mode (1), i.e., the second signal input terminal IN2 receives the first DVB-S / S2 signal first, and the first signal input terminal IN1 receives the DVB-T / T2 / C signal, the broadcast signal input and processing process of the display device can be referred to FIG. 19 and related embodiments; and the frequency-locked control process of the display device is as follows:

[0529] The controller 70 generates a first frequency-locked indication signal, and sends the signal to the first signal demodulation module 521 to instruct the first signal demodulation module 521 to generate a first frequency-locked signal;

[0530] The controller 70 generates a first feedback indication signal, and sends the signal to the feedback module 53 to instruct the feedback module 53 to switch on the first feedback path L1, so that the first signal demodulation module 521 is coupled with IN2, and the first frequency-locked signal is fed back to IN2, thereby realizing the locking of the corresponding frequency point in the first DVB-S / S2 signal demodulated by the first signal demodulation module 521.

[0531] For mode (2), i.e., the first signal input terminal IN1 receives the DVB-T / T2 / C signal first, and the second signal input terminal IN2 receives the first DVB-S / S2 signal, the broadcast signal input and processing process of the display device can be referred to FIG. 20 and related embodiments; and the frequency-locked control process of the display device is as follows:

[0532] The controller 70 generates a second frequency-locked indication signal, and sends the signal to the second signal demodulation module 522 to instruct the second signal demodulation module 522 to generate a second frequency-locked signal;

[0533] The controller 70 generates a third feedback indication signal and sends it to the feedback module 53, instructing the feedback module 53 to establish the third feedback path L3, so that the second signal demodulation module 522 is coupled with IN2 respectively, and the second frequency-locked signal is fed back to IN2, realizing the locking of the corresponding frequency point in the first DVB-S / S2 signal demodulated by the second signal demodulation module 522.

[0534] As can be seen, the display device shown in FIGS. 24-27 can realize multiple working modes, including but not limited to the above-mentioned modes (1)-(5). In different modes, the controller 70 only needs to generate different feedback indication signals and send them to the feedback module 53 to control the feedback module 53 to select the corresponding feedback path, so as to realize the accurate feedback of the frequency-locked signal in the corresponding mode, thereby realizing the accurate locking of the corresponding frequency point in the satellite broadcast signal.

[0535] That is, for the controller 70 of the display device shown in FIGS. 24-27, if it wants to lock the frequency point demodulated by a certain demodulation module, it will send the frequency-locked indication signal to the demodulation module. The frequency-locked signal generated by each demodulation module is used to lock the frequency point demodulated by itself, and there is no case that one demodulation module replaces another demodulation module to generate the frequency-locked signal as shown in the display device of FIG. 17, nor is there a case that a dormant or unpowered demodulation module replaces another demodulation module to generate the frequency-locked signal. Therefore, it is not necessary to wait for the corresponding demodulation module to wake up or be powered on, so as to ensure the feedback efficiency and accuracy of the frequency-locked signal, and accordingly, in the channel switching and other user operations, faster and more accurate responses can be provided to improve the user experience.

[0536] In some embodiments, the display device shown in FIGS. 24-27 can further include one or two LNB units, i.e., the first LNB unit 531 and the second LNB unit 532 described above, for power management and control of external devices (such as Unicable devices) of the display device.

[0537] In different embodiments, the LNB unit can be arranged upstream (relative to the transmission direction of the frequency-locked signal) of each feedback switch, or downstream of each feedback switch, forming different circuit structures.

[0538] In some embodiments, based on the feedback module 53 shown in FIG. 26, the LNB unit can be arranged upstream of each feedback switch, that is, as shown in FIG. 28:

[0539] The input end of the first LNB unit 531 is coupled with the first signal demodulation module 521, and the output end of the first LNB unit 531 is coupled with the third end c3 of the first feedback switch SW1 and the fifth end c5 of the second feedback switch SW2 respectively;

[0540] The input end of the second LNB unit 532 is coupled with the second signal demodulation module 522, and the output end of the second LNB unit 532 is coupled with the second end c2 of the first feedback switch SW1 and the sixth end c6 of the second feedback switch SW2 respectively.

[0541] In some embodiments, based on the feedback module 53 shown in FIG. 26, the LNB unit can be arranged downstream of each feedback switch, that is, as shown in FIG. 29:

[0542] The input end of the first LNB unit 531 is coupled with the first end c1 of the first feedback switch SW1, and the output end of the first LNB unit 531 is coupled with the second signal input end IN2.

[0543] The input end of the second LNB unit 532 is coupled with the fourth end c4 of the second feedback switch SW2, and the output end of the second LNB unit 532 is coupled with the third signal input end IN3.

[0544] In some embodiments, based on the feedback module 53 shown in FIG. 27, the LNB unit can be arranged upstream of each feedback switch, that is, as shown in FIG. 30:

[0545] The input end of the first LNB unit 531 is coupled with the first signal demodulation module 521, and the output end of the first LNB unit 531 is coupled with the fourth end d4 of the fourth feedback switch SW4.

[0546] The input end of the second LNB unit 532 is coupled with the second signal demodulation module 522, and the output end of the second LNB unit 532 is coupled with the first end d1 of the third feedback switch SW3.

[0547] In some embodiments, based on the feedback module 53 shown in FIG. 27, the LNB unit can be arranged downstream of each feedback switch, that is, as shown in FIG. 31:

[0548] The input end of the first LNB unit 531 is coupled with the second end d2 of the third feedback switch SW3 and the sixth end d6 of the fourth feedback switch SW4 respectively, and the output end of the first LNB unit 531 is coupled with the second signal input end IN2.

[0549] The input end of the second LNB unit 531 is coupled with the third end d3 of the third feedback switch SW3 and the fifth end d5 of the fourth feedback switch SW4 respectively, and the output end of the second LNB unit 532 is coupled with the third signal input end IN3.

[0550] It should be noted that the feedback switches SW1-SW4 shown in FIGS. 25-30 can correspond to the second path selection switch 255' in some embodiments and the accompanying drawings; the positional relationship between the LNB unit and the feedback switches in FIG. 30 is also shown in FIGS. 14b and 16b, and the positional relationship between the LNB unit and the feedback switches in FIG. 31 is also shown in FIGS. 14a and 16a. Related embodiments can be referred to each other.

[0551] As can be seen from FIGS. 26-31, different wiring modes of the feedback switches and different relative positions of the feedback switches and the LNB unit can form display devices of different structures, all of which can accurately feed back the frequency-locked signal in different modes and provide more possibilities and flexibility for circuit layout design in the display device. Other display devices formed by modification or replacement on this basis are also within the scope of the embodiments of the present disclosure.

[0552] Referring to FIG. 32, some embodiments also provide a display device provided with three demodulation modules to solve the feedback problem of the frequency-locked signal in some working modes.

[0553] Compared with the display device shown in FIGS. 17 and 18, the display device shown in FIG. 32 further includes a third signal demodulation module 523 in addition to the first signal demodulation module 521 and the second signal demodulation module 522; and the input path selection module 51 is further provided with a third signal output end OUT3.

[0554] Based on the display device shown in FIG. 32, in some embodiments, the first signal output end OUT1 can be coupled with any one of the second signal input end IN2 and the third signal input end IN3; and the first signal output end OUT1 is further coupled with the first signal demodulation module 521. Thus, in different modes, the first signal demodulation module 521 can demodulate the first DVB-S / S2 signal from the second signal input end IN2 or demodulate the second DVB-S / S2 signal from the third signal input end IN3.

[0555] Based on the display device shown in FIG. 32, in some embodiments, the second signal output end OUT2 can be coupled with any one of the first signal input end IN1, the second signal input end IN2 and the third signal input end IN3; and the second signal output end OUT2 is further coupled with the second signal demodulation module 522. Thus, in different modes, the second signal demodulation module 522 can demodulate the DVB-T / T2 / C signal from the first signal input end IN1, or demodulate the first DVB-S / S2 signal, or demodulate the second DVB-S / S2 signal.

[0556] Based on the display device shown in FIG. 32, in some embodiments, the third signal output end OUT3 is coupled with the first signal input end IN1; and the third signal demodulation module 523 is coupled with the third signal output end OUT3. Thus, the third signal demodulation module 523 can demodulate the DVB-T / T2 / C signal from the first signal input end IN1.

[0557] It should be noted that the third signal demodulation module 523 corresponds to the second demodulation module 253b described in some embodiments above and in FIG. 11a, FIG. 11c, etc., and the related contents can be referred to each other.

[0558] In some embodiments, at least one of the first signal demodulation module 521, the second signal demodulation module 522 and the third signal demodulation module 523 can be integrated with the controller 70 in a system on chip (SOC).

[0559] In some embodiments, the display device shown in FIG. 32 can also be provided with receiving terminals, filter direct current isolation circuits, LNAs and other components, and the related structures can be referred to FIG. 23, which will not be described here again.

[0560] In some embodiments, the broadcast signal demodulated by the first signal demodulation module 521 can be a satellite broadcast signal, and thus the first signal demodulation module 521 is further configured to generate a first frequency-locked signal; the broadcast signal demodulated by the second signal demodulation module 522 can be a satellite broadcast signal, and thus the second signal demodulation module 522 is further configured to generate a second frequency-locked signal.

[0561] As shown in FIG. 32, the first signal demodulation module 521 can be directly coupled with the second signal input end IN2, so as to feed back the first frequency-locked signal to the second signal input end IN2; and the second signal demodulation module 522 can be directly coupled with the third signal input end IN3, so as to feed back the second frequency-locked signal to the third signal input end IN3.

[0562] The following describes the broadcast signal input and frequency-locked control process of the display device shown in FIG. 32 in different modes.

[0563] In some embodiments, for the modes (1) and (2) described above, i.e., in the case that the first signal input end IN1 receives the DVB-T / T2 / C signal and the second signal input end IN2 receives the first DVB-S / S2 signal, the broadcast signal input control process of the display device shown in FIG. 32 is as follows:

[0564] The controller 70 controls the input path selection module 51 to couple the first signal input end IN1 with the third signal output end OUT3 and the second signal input end IN2 with the first signal output end OUT1, so that the DVB-T / T2 / C signal can be demodulated by the third signal demodulation module 523 and the first DVB-S / S2 signal can be demodulated by the first signal demodulation module 521.

[0565] Correspondingly, for modes (1) and (2), the frequency locking control process of the display device shown in FIG. 32 is as follows:

[0566] Since in modes (1) and (2), the first DVB-S / S2 signal received by the second signal input end IN2 is demodulated by the first signal demodulation module 521, the controller 70 generates a first frequency locking indication signal and sends it to the first signal demodulation module 521, so as to instruct the first signal demodulation module 521 to generate a first frequency locking signal and feed it back to the second signal input end IN2, thereby realizing the locking of the corresponding frequency point in the first DVB-S / S2 signal input by the second signal input end IN2 and demodulated by the first signal demodulation module 521.

[0567] As can be seen, the display device shown in FIG. 32, by adding the third signal demodulation module 523, when the DVB-T / T2 / C signal is received at the first signal input end IN1, can be demodulated by the third signal demodulation module 523, without having to occupy the first signal demodulation module 521 to demodulate the DVB-T / T2 / C signal as in the display devices shown in FIGS. 17 or 18, etc. In this way, when the first DVB-S / S2 signal is received at the second signal input end IN2, the first DVB-S / S2 signal can be demodulated by the first signal demodulation module 521. Correspondingly, the controller 70 can send the first frequency locking indication signal to the first signal demodulation module 521 to instruct the first signal demodulation module 521 to generate a first frequency locking signal and feed it back to IN2, thereby realizing the locking of the first DVB-S / S2 signal.

[0568] That is, the display device shown in FIG. 32 will not have the situation that "occupying the first signal demodulation module 521 to demodulate the DVB-T / T2 / C signal results in the first DVB-S / S2 signal received at the second signal input end IN2 having to be demodulated by the second signal demodulation module 522". Correspondingly, in the frequency locking control process of mode (2), the controller 70 does not have to instruct the first signal demodulation module 521 to generate the corresponding frequency locking signal instead of the second signal demodulation module 522 as shown in FIG. 20 (i.e., the frequency locking control process F3 described above), so the control process is simpler and the feedback efficiency and accuracy are more reliable, thereby reducing the response time of the display device during channel switching and improving the user experience.

[0569] In addition, the display device shown in FIG. 32 does not need to perform the differential control shown in FIGS. 19 and 20 for the modes (1) and (2) described above, i.e., the access order of the DVB-T / T2 / C signal and the first DVB-S / S2 signal is not limited, and the same broadcast signal input control and frequency locking control process can be used whether the DVB-T / T2 / C signal is accessed first and then the first DVB-S / S2 signal is accessed (i.e., mode (2)) or the first DVB-S / S2 signal is accessed first and then the DVB-T / T2 / C signal is accessed (i.e., mode (1)), so that the mode control of the display device can be simplified and the control efficiency and accuracy can be improved.

[0570] In some embodiments, the display device shown in FIG. 32 can also implement the mode (5) described above, and the specific processing process is as follows:

[0571] When the display device detects that the first signal input end IN1 receives the DVB-T / T2 / C signal, the controller 70 sends configuration information to the input path selection module 51 to control the first signal input end IN1 to be coupled to the third signal output end OUT3 and the second signal output end OUT2, so that the DVB-T / T2 / C signal passes through the two signal output ends OUT3 and OUT2 and is output to the third signal demodulation module 523 and the second signal demodulation module 522, respectively, so that the DVB-T / T2 / C signal is demodulated by the two demodulation modules 523 and 522, respectively, to obtain two TS streams, and one recording and one broadcasting are implemented.

[0572] Since there is no DVB-S / S2 signal in mode (5), the display device does not need to perform feedback control.

[0573] In some embodiments, the display device shown in FIG. 32 can also implement the mode (3) described above, and the detailed processing process can refer to FIG. 21 and the related embodiments, and only a brief description is given as follows:

[0574] When the second signal input end IN2 receives the first DVB-S / S2 signal and the third signal input end IN3 receives the second DVB-S / S2 signal, the controller 70 sends the first indication signal k1 and other configuration information to the input path selection module 51 to control the second signal input end IN2 of the input path selection module 51 to be coupled to the first signal output end OUT1 and the third signal input end IN3 to be coupled to the second signal output end OUT3, so that the first DVB-S / S2 signal can be demodulated by the first signal demodulation module 521 and the second DVB-S / S2 signal can be demodulated by the second signal demodulation module 522;

[0575] Correspondingly, the controller 70 can also send a first frequency locking indication signal to the first signal demodulation module 521 to instruct the first signal demodulation module 521 to generate a first frequency locking signal and feed back to the second signal input terminal IN2, and send a second frequency locking indication signal to the second signal demodulation module 522 to instruct the second signal demodulation module 522 to generate a second frequency locking signal and feed back to the third signal input terminal IN3, so as to realize accurate locking of the corresponding frequency points in the two satellite broadcast signals received by the two signal input terminals.

[0576] In some embodiments, in the display device shown in FIG. 32, the controller 70 is further configured to:

[0577] In the case where the second signal demodulation module 522 demodulates the first satellite broadcast signal received through the second signal input terminal IN2, the first frequency locking indication signal is sent to the first signal demodulation module 521 to instruct the first signal demodulation module 521 to generate a first frequency locking signal to lock the frequency point in the first satellite broadcast signal demodulated by the second signal demodulation module 522.

[0578] That is, the display device shown in FIG. 32 can implement mode (4) described above in combination with the frequency locking control process F3 described above, and the detailed processing process can refer to FIG. 22 and related embodiments, which are only briefly described as follows.

[0579] The display device detects that the second signal input terminal IN2 receives the first DVB-S / S2 signal under the Unicable standard, and sends the first indication signal k1 and other configuration information to the input path selection module 51 through the controller 70 to control the second signal input terminal IN2 to be coupled with the first signal output terminal OUT1 and the second signal output terminal OUT2 respectively, so that the first DVB-S / S2 signal passes through the two signal output terminals OUT1 and OUT2 and is output to the first signal demodulation module 521 and the second signal demodulation module 522 respectively, so that different frequency points in the first DVB-S / S2 signal are demodulated through the two demodulation modules 521 and 522 respectively to obtain two TS streams, and realize one recording and one broadcasting.

[0580] Correspondingly, in order to lock different frequency points in the first DVB-S / S2 signal demodulated by the first signal demodulation module 521 and the second signal demodulation module 522 respectively, based on the frequency locking control processes F1 and F3 described above, the controller 70 only sends a first frequency locking indication signal to the first signal demodulation module 521 to instruct the first signal demodulation module 521 to generate two first frequency locking signals, i.e. D11 and D12, and both feed back to the second signal input terminal IN2, so as to lock the frequency point demodulated by the first signal demodulation module 521 and the frequency point demodulated by the second signal demodulation module 522 in the first DVB-S / S2 signal respectively.

[0581] In some embodiments, the display device shown in FIG. 32, the controller 70 is further configured to:

[0582] In the case that the first signal demodulation module 521 demodulates the second satellite broadcast signal received through the third signal input terminal IN3, the second frequency locking indication signal is sent to the second signal demodulation module 522, instructing the second signal demodulation module 522 to generate a second frequency locking signal to lock the frequency point in the second satellite broadcast signal demodulated by the first signal demodulation module 521.

[0583] That is, the display device shown in FIG. 32 can implement the mode (6) described above in combination with the frequency locking control process F4 described above, and the relevant processing process is briefly described as follows:

[0584] The display device detects that the third signal input terminal IN3 receives the second DVB-S / S2 signal under the Unicable standard, and sends the first indication signal k1 and other configuration information to the input path selection module 51 through the controller 70, controls the third signal input terminal IN3 to be coupled with the first signal output terminal OUT1 and the second signal output terminal OUT2 respectively, so that the second DVB-S / S2 signal passes through the two signal output terminals OUT1 and OUT2 and is output to the first signal demodulation module 521 and the second signal demodulation module 522 respectively, so that different frequency points in the second DVB-S / S2 signal are demodulated by the two demodulation modules 521 and 522 respectively, to obtain two TS streams, and realize one recording and one broadcasting.

[0585] Correspondingly, in order to lock different frequency points in the second DVB-S / S2 signal demodulated by the first signal demodulation module 521 and the second signal demodulation module 522 respectively, based on the frequency locking control processes F2 and F4 described above, the controller 70 only sends the second frequency locking indication signal to the second signal demodulation module 522, instructing the second signal demodulation module 522 to generate two second frequency locking signals, i.e. D21 and D22, and both are fed back to the third signal input terminal IN3, so as to lock the frequency point in the second DVB-S / S2 signal demodulated by the first signal demodulation module 521 and the frequency point in the second DVB-S / S2 signal demodulated by the second signal demodulation module 522 respectively.

[0586] In some embodiments, the display device shown in FIG. 32 can also be provided with a feedback module 53, as shown in FIG. 33, to couple at least one of the first signal demodulation module 521 and the second signal demodulation module 522 with at least one of the second signal input terminal IN2 and the third signal input terminal IN3 through the feedback module 53, and feed back the frequency locking signal generated by the corresponding demodulation module to the corresponding signal input terminal, to realize the modes (4) and (6) described above.

[0587] It should be noted that based on FIG. 25, the display device shown in FIG. 33 has two feedback input terminals and two feedback output terminals; in other possible embodiments, based on FIG. 24 and related embodiments, the feedback module 53 added on the basis of the display device shown in FIG. 32 can also be provided with only one feedback input terminal and one feedback output terminal, and the specific implementation can refer to the foregoing embodiments, which will not be described here.

[0588] In some embodiments, based on the feedback module 53 in FIG. 33, the controller 70 is further configured to:

[0589] In the case where the second signal demodulation module 522 demodulates the first satellite broadcast signal received through the second signal input terminal IN2, a second frequency locking indication signal is sent to the second signal demodulation module 522 to instruct the second signal demodulation module 522 to generate a second frequency locking signal; and,

[0590] A third feedback indication signal is sent to the feedback module 53 to instruct the feedback module 53 to couple the second signal demodulation module 522 with the second signal input terminal IN2, that is, to form a third feedback path L3, so that the second frequency locking signal is fed back to the second signal input terminal IN2, thereby locking the frequency point in the first satellite broadcast signal demodulated by the second signal demodulation module 522.

[0591] Based on the above configuration of the controller 70, the display device shown in FIG. 33 can realize the frequency locking control in mode (4) described above, and specific implementation can refer to the related embodiments described above, which will not be described here.

[0592] In some embodiments, based on the feedback module 53 in FIG. 33, the controller 70 is further configured to:

[0593] In the case where the first signal demodulation module 521 demodulates the second satellite broadcast signal received through the third signal input terminal IN3, a first frequency locking indication signal is sent to the first signal demodulation module 521 to instruct the first signal demodulation module 521 to generate a first frequency locking signal; and,

[0594] A fourth feedback indication signal is sent to the feedback module 53 to instruct the feedback module 53 to couple the first signal demodulation module 521 with the third signal input terminal IN3, so that the first frequency locking signal is fed back to the third signal input terminal IN3, and the frequency point in the second satellite broadcast signal demodulated by the first signal demodulation module 521 is locked.

[0595] Based on the above configuration of the controller 70, the display device shown in FIG. 33 can realize the frequency locking control in mode (6) described above, and specific implementation can refer to the related embodiments described above, which will not be described here.

[0596] In some embodiments, the feedback module 53 of the display device shown in FIG. 33 can specifically include one or both of the first feedback switch SW1 and the second feedback switch SW2 as described in the foregoing embodiments, to achieve coupling of at least one of the first signal demodulation module 521 and the second signal demodulation module 522 with at least one of the second signal input end IN2 and the third signal input end IN3, thereby achieving modes (4) and (6), etc. The specific circuit structure and wiring mode can refer to FIG. 26 and the related embodiments, which will not be repeated here.

[0597] In some embodiments, the feedback module 53 of the display device shown in FIG. 33 can specifically include one or both of the third feedback switch SW3 and the fourth feedback switch SW4 as described in the foregoing embodiments, to achieve coupling of at least one of the first signal demodulation module 521 and the second signal demodulation module 522 with at least one of the second signal input end IN2 and the third signal input end IN3, thereby achieving modes (4) and (6), etc. The specific circuit structure and wiring mode can refer to FIG. 27 and the related embodiments, which will not be repeated here.

[0598] It should be noted that in the display device shown in FIGS. 32 and 33, the input path selection module 51 can include the third controllable switch S3, the fourth controllable switch S4, the first T signal tuning unit 511, the second T signal tuning unit 512, the first S signal tuning unit 513, and the second S signal tuning unit 514, etc. The first T signal tuning unit 511 is coupled with the third signal demodulation module 523 through the third signal output end OUT3, and the other connection modes and functions can refer to FIG. 18 and the related embodiments. In addition, at least one of the first LNB unit 531 and the second LNB unit 532 can also be provided in the display device shown in FIGS. 32 and 33, which can refer to FIGS. 18, 28-31 and the related embodiments, which will not be repeated here.

[0599] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than limit them; although the present disclosure has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and such modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present disclosure.

[0600] For the sake of explanation, the foregoing descriptions have been presented in terms of particular embodiments. The foregoing discussion, however, is not intended to exhaustively enumerate all possible embodiments. Modifications and alterations many be made thereto according to the teachings of the present disclosure. The choice of words in the preceding description has been made with the aim of using language that is both current and indicative of the principles of the embodiments. The embodiments have been chosen and described in order to explain the principles of the embodiments and the practical applications, and to enable others skilled in the art to understand for themselves the various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. A display device, comprising: a plurality of first input ports configured to receive broadcast television signals; a plurality of first demodulation modules having inputs and configured to demodulate the broadcast television signals received at the inputs thereof to generate first video signals; a first path selection module coupled to the plurality of first input ports and the plurality of first demodulation modules and configured to couple selected broadcast television signals to selected first demodulation modules; a main controller coupled to the plurality of first demodulation modules and the first path selection module and configured to control the display device to display based on the first video signals.

2. The display device of claim 1, wherein, The first path selection module comprises a first path selection switch, The first path selection switch corresponds to the first input ports, the first path selection switch has a common terminal and at least one first switching terminal, the first common terminal is coupled to the corresponding first input port, and the first switching terminal is coupled to the input terminal of the corresponding first demodulation module corresponding to the corresponding first input port; The first path selection switch is configured to, in response to a first indication signal, establish or break the coupling between the first common terminal and the first switching terminal to couple the selected broadcast television signal to the selected first demodulation module.

3. The display device according to claim 1 or 2, wherein, The number of first demodulation modules is a plurality, and the first input port corresponds to at least one first demodulation module.

4. The display device of claim 3, wherein, The first demodulation modules corresponding to different first input ports are the same.

5. The display device according to any one of claims 1 to 4, wherein, The display device further comprises a second input port, the second output port corresponds to at least one second demodulation module, and the second demodulation module does not correspond to the first input port.

6. The display device of claim 5, wherein, The broadcast television signal comprises a terrestrial television signal, a cable signal and a satellite television signal; The satellite television signal is coupled to the display device through the first input port; The terrestrial television signal / cable signal is coupled to the display device through the second input port.

7. The display device of any of claims 3-6, wherein, The first demodulation module has a feedback terminal, and the first demodulation module is configured to output a feedback signal through the feedback terminal when demodulating the satellite television signal; The display device further comprises at least one second path selection module, the second path selection module corresponds to the first demodulation module, is coupled to the feedback terminal of the corresponding first demodulation module, and is configured to, when receiving the feedback signal, establish the coupling between the feedback terminal of the corresponding first demodulation module and the first input port sending the satellite television signal to the corresponding first demodulation module, so as to lock the satellite television signal received by the corresponding first demodulation module based on the feedback signal.

8. The display device of claim 7, wherein, The second path selection module comprises a second path selection switch; The second path selection switch has a second common terminal and at least one second switching terminal; the second common terminal is coupled to the feedback terminal of the corresponding first demodulation module, and the second switching terminal is coupled to the first input port corresponding to the corresponding first demodulation module; The second path selection switch is configured to, in response to a second indication signal, establish or break the coupling between the second common terminal and the second switching terminal to lock the satellite television signal received by the corresponding first demodulation module based on the feedback signal.

9. The display device of claim 8, wherein, The second path selection module further comprises: The LNB unit is coupled with the second path selection switch and is configured to perform signal processing on the received feedback signal to generate a lock signal for locking the satellite television signal.

10. The display device of claim 9, wherein, The LNB unit corresponds to the first input port, the second common end is coupled with the feedback end of the corresponding first demodulation module, and the second switching end is coupled with the input end of the LNB unit. The output end of the LNB unit is coupled with the corresponding first input port.

11. The display device of claim 9, wherein, The LNB unit corresponds to the first demodulation module, the input end of the LNB unit is coupled with the feedback end of the corresponding first demodulation module, and the output end of the LNB unit is coupled with the second common end of the second path selection switch corresponding to the first demodulation module; The second switching end is coupled with the first input port.

12. The display device of any one of claims 5-11, wherein, The display device further comprises a plurality of first tuning units, The first tuning unit is coupled with the first path selection switch, and the first tuning unit is configured to perform format conversion processing on the received broadcast television signal to generate a converted broadcast television signal; The first demodulation module is configured to generate the first video signal based on the converted broadcast television signal.

13. The display device of claim 12, wherein, The first tuning unit corresponds to the first demodulation module; the first common end is coupled with the corresponding first input port, and the first switching end is coupled with the input end of the first tuning unit corresponding to the first input port; The output end of the first tuning unit is coupled with the corresponding first demodulation module.

14. The display device of claim 12, wherein, The first tuning unit corresponds to the first input port; The input end of the first tuning unit is coupled with the corresponding first input port, the output end of the first tuning unit is coupled with the first common end corresponding to the first input port, and the first switching end is coupled with the input end of the first demodulation module corresponding to the first input port.

15. The display device of claim 1, wherein The first path selection module comprises an input path selection module; The input path selection module is provided with: A second signal input end configured to receive a first satellite broadcast signal; A third signal input end configured to receive a second satellite broadcast signal; A first signal output end; and A second signal output end; The input path selection module is configured to selectively couple the second signal input end with at least one of the first signal output end and the second signal output end, and to selectively couple the third signal input end with at least one of the first signal output end and the second signal output end; The first demodulation module comprises: A first signal demodulation module coupled with the first signal output end and configured to perform channel demodulation on the broadcast signal output via the first signal output end to generate a TS stream; and a first frequency lock signal can be generated and fed back to the second signal input end; The second signal demodulation module is coupled with the second signal output end and is configured to perform channel demodulation on the broadcast signal output via the second signal output end to generate a TS stream; and a second frequency-locked signal can be generated and fed back to the third signal input end; The main controller is further configured to: send a first frequency-locked instruction signal to the first signal demodulation module in a case where the second signal demodulation module demodulates the first satellite broadcast signal received via the second signal input end; The first frequency-locked instruction signal is used to instruct the first signal demodulation module to generate the first frequency-locked signal; and the first frequency-locked signal is used to instruct to lock the frequency point of the first satellite broadcast signal demodulated by the second signal demodulation module.

16. The display device of claim 15, wherein, The main controller is further configured to: send a second frequency-locked instruction signal to the second signal demodulation module in a case where the first signal demodulation module demodulates the second satellite broadcast signal received via the third signal input end; The second frequency-locked instruction signal is used to instruct the second signal demodulation module to generate the second frequency-locked signal; and the second frequency-locked signal is used to instruct to lock the frequency point of the second satellite broadcast signal demodulated by the first signal demodulation module.

17. The display device of claim 16, wherein The input path selection module is configured to, in a case where the second satellite broadcast signal is received via the third signal input end, couple the third signal input end with the first signal output end and the second signal output end to output the second satellite broadcast signal via the first signal output end and the second signal output end.

18. The display device of any one of claims 15 to 17, wherein The input path selection module is configured to, in a case where the first satellite broadcast signal is received via the second signal input end, couple the second signal input end with the first signal output end and the second signal output end to output the first satellite broadcast signal via the first signal output end and the second signal output end.

19. The display device of any one of claims 15 to 18, wherein The input path selection module is configured to, in a case where the second signal input end is coupled with the first signal output end to output the first satellite broadcast signal via the first signal output end, the third signal input end receives the second satellite broadcast signal, and the third signal input end is coupled with the second signal output end to output the second satellite broadcast signal via the second signal output end.

20. The display device of any one of claims 15 to 19, wherein The input path selection module is further provided with: a first signal input end configured to receive a terrestrial broadcast signal; The input path selection module is configured to, In the case that the ground broadcast signal is received by the first signal input end, the first signal input end is coupled with the first signal output end and the second signal output end respectively, so as to output the ground broadcast through the first signal output end and the second signal output end respectively.

21. The display device according to any one of claims 15 to 19, wherein The input path selection module is further provided with: a first signal input end configured to receive a ground broadcast signal; The input path selection module is configured to, In the case that the first signal input end is coupled with the first signal output end to output the ground broadcast signal received by the first signal input end, the second signal input end receives the first satellite broadcast signal, and the second signal input end is coupled with the second signal output end to output the first satellite broadcast signal through the second signal output end.

22. The display device of any of claims 15-21, wherein, The input path selection module is further provided with: a first signal input end configured to receive a ground broadcast signal; The input path selection module is configured to, In the case that the second signal input end is coupled with the first signal output end to output the first satellite broadcast signal through the first signal output end, the first signal input end receives the ground broadcast signal, and the first signal input end is coupled with the second signal output end to output the ground broadcast signal through the second signal output end.

23. The display device according to any one of claims 15 to 22, wherein The main controller is further configured to generate a first indication signal; The input path selection module comprises: a third controllable switch; the third controllable switch comprises: a third switch common end coupled with the second signal input end; two third switch switching ends respectively coupled with the first signal output end and the second signal output end; The third controllable switch is configured to, in response to the first indication signal, establish or break the coupling between the third switch common end and at least one of the third switch switching ends, so as to output the first satellite broadcast signal received by the second signal input end through the corresponding signal output end of the at least one third switch switching end.

24. The display device according to any one of claims 15 to 23, wherein The main controller is further configured to generate a first indication signal; The input path selection module comprises: a fourth controllable switch; the fourth controllable switch comprises: a fourth switch common end coupled with the third signal input end; two fourth switch switching ends respectively coupled with the first signal output end and the second signal output end; The fourth controllable switch is configured to, in response to the first indication signal, establish or break the coupling between the fourth switch common end and at least one of the fourth switch switching ends, so as to output the second satellite broadcast signal received by the third signal input end through the corresponding signal output end of the at least one fourth switch switching end. 25.The display device of claim 1, wherein, the first path selection module comprises an input path selection module; the input path selection module is provided with: a second signal input configured to receive a first satellite broadcast signal; a third signal input configured to receive a second satellite broadcast signal; a first signal output; and a second signal output; the input path selection module is configured to couple the second signal input with at least one of the first signal output and the second signal output, and to couple the third signal input with at least one of the first signal output and the second signal output; the first demodulation module comprises: a first signal demodulation module coupled with the first signal output and configured to perform channel demodulation on a broadcast signal output via the first signal output to obtain a TS stream and to generate a first frequency-locked signal; a second signal demodulation module coupled with the second signal output and configured to perform channel demodulation on a broadcast signal output via the second signal output to obtain a TS stream and to generate a second frequency-locked signal; the display device further comprises: a feedback module; an input of the feedback module is coupled with the first signal demodulation module and the second signal demodulation module; an output of the feedback module is coupled with the second signal input and the third signal input; the main controller is further configured to: in a case where the second signal demodulation module demodulates the first satellite broadcast signal received via the second signal input, send a second frequency-locked instruction signal to the second signal demodulation module to instruct the second signal demodulation module to generate a second frequency-locked signal, and send a third feedback instruction signal to the feedback module to instruct the feedback module to couple the second signal demodulation module with the second signal input so that the second frequency-locked signal is fed back to the second signal input; wherein the second frequency-locked signal is used to lock a frequency point in the first satellite broadcast signal that is demodulated by the second signal demodulation module.

26. The display device of claim 25, wherein, the main controller is further configured to: in a case where the first signal demodulation module demodulates the second satellite broadcast signal received via the third signal input, send a first frequency-locked instruction signal to the first signal demodulation module to instruct the first signal demodulation module to generate a first frequency-locked signal, and send a fourth feedback instruction signal to the feedback module to instruct the feedback module to couple the first signal demodulation module with the third signal input so that the first frequency-locked signal is fed back to the third signal input; wherein the first frequency-locked signal is used to lock a frequency point in the second satellite broadcast signal that is demodulated by the first signal demodulation module.

27. The display device of claim 25 or 26, wherein, the feedback module is provided with: a feedback input coupled with the first signal demodulation module and the second signal demodulation module, respectively; a feedback output coupled with the second signal input and the third signal input, respectively; a third feedback path and a fourth feedback path between the feedback input end and the feedback output end; the feedback module is configured to, in response to the third feedback indication signal, select the third feedback path, and in response to the fourth feedback indication signal, select the fourth feedback path; the main controller is further configured to: in a case where the second signal demodulation module demodulates the first satellite broadcast signal received through the second signal input end, send the third feedback indication signal to the feedback module to instruct the feedback module to select the third feedback path, couple the second signal demodulation module with the second signal input end, and feed back the second frequency-locked signal to the second signal input end.

28. The display device of claim 27, wherein, the main controller is further configured to: in a case where the first signal demodulation module demodulates the second satellite broadcast signal received through the third signal input end, send the fourth feedback indication signal to the feedback module to instruct the feedback module to select the fourth feedback path, couple the first signal demodulation module with the third signal input end, and feed back the first frequency-locked signal to the third signal input end.

29. The display device of claim 27 or 28, wherein, the feedback module is provided with: a first feedback input end coupled with the first signal demodulation module; a second feedback input end coupled with the second signal demodulation module; a first feedback output end coupled with the second signal input end; a second feedback output end coupled with the third signal input end; wherein the third feedback path is provided between the second feedback input end and the first feedback output end, and the fourth feedback path is provided between the first feedback input end and the second feedback output end.

30. The display device of any of claims 25-29, wherein, in a case where the second signal input end receives the first satellite broadcast signal, the input path selection module is configured to: couple the second signal input end with the first signal output end and the second signal output end respectively, so as to demodulate the first satellite broadcast signal through the first signal demodulation module and the second signal demodulation module respectively; the main controller is further configured to: send a first frequency-locked indication signal to the first signal demodulation module to instruct the first signal demodulation module to generate the first frequency-locked signal; send a second frequency-locked indication signal to the second signal demodulation module to instruct the second signal demodulation module to generate the second frequency-locked signal; send a first feedback indication signal and the third feedback indication signal to the feedback module to instruct the feedback module to couple the first signal demodulation module and the second signal demodulation module with the second signal input end respectively, so as to feed back the first frequency-locked signal and the second frequency-locked signal to the second signal input end, and realize locking of corresponding frequency points in the first satellite broadcast signal.

31. The display device of any of claims 25-30, wherein, in a case where the second signal input end receives the first satellite broadcast signal and the third signal input end receives the second satellite broadcast signal, the input path selection module is configured to: The second signal input end is coupled with the first signal output end, and the third signal input end is coupled with the second signal output end, so as to demodulate the first satellite broadcast signal by the first signal demodulation module and the second satellite broadcast signal by the second signal demodulation module; The main controller is further configured to: send a first frequency locking instruction signal to the first signal demodulation module, to instruct the first signal demodulation module to generate the first frequency locking signal; send a second frequency locking instruction signal to the second signal demodulation module, to instruct the second signal demodulation module to generate the second frequency locking signal; send a first feedback instruction signal and a second feedback instruction signal to the feedback module, to instruct the feedback module to couple the first signal demodulation module with the second signal input end and the second signal demodulation module with the third signal input end, so as to feed back the first frequency locking signal to the second signal input end and the second frequency locking signal to the third signal input end, and realize locking of corresponding frequency points in the first satellite broadcast signal and the second satellite broadcast signal.

32. The display device of any of claims 25-31, wherein, The input path selection module is further provided with: a first signal input end configured to receive a terrestrial broadcast signal; in the case that the first signal input end receives the terrestrial broadcast signal first and the second signal input end receives the first satellite broadcast signal later, the input path selection module is configured to: couple the first signal input end with the first signal output end, so as to demodulate the terrestrial broadcast signal by the first signal demodulation module; couple the second signal input end with the second signal output end, so as to demodulate the first satellite broadcast signal by the second signal demodulation module; The main controller is configured to: send a second frequency locking instruction signal to the second signal demodulation module, to instruct the second signal demodulation module to generate the second frequency locking signal; send a second feedback instruction signal to the feedback module, to instruct the feedback module to couple the second signal demodulation module with the second signal input end, so as to feed back the second frequency locking signal to the second signal input end, and realize locking of corresponding frequency points in the first satellite broadcast signal.

33. The display device of any of claims 25-32, wherein, The input path selection module is further provided with: a first signal input end configured to receive a terrestrial broadcast signal; in the case that the second signal input end receives the first satellite broadcast signal first and the first signal input end receives the terrestrial broadcast signal later, the input path selection module is configured to: couple the second signal input end with the first signal output end, so as to demodulate the first satellite broadcast signal by the first signal demodulation module; couple the first signal input end with the third signal output end, so as to demodulate the terrestrial broadcast signal by the third signal demodulation module; The main controller is further configured to: send a first frequency locking instruction signal to the first signal demodulation module, to instruct the first signal demodulation module to generate the first frequency locking signal; send a first feedback instruction signal to the feedback module, to instruct the feedback module to couple the first signal demodulation module with the second signal input end, so as to feed back the first frequency locking signal to the second signal input end, and realize locking of corresponding frequency points in the first satellite broadcast signal.

34. The display device of any of claims 25-33, wherein, the main controller is further configured to generate a first indication signal; the input path selection module comprises: a third controllable switch; the third controllable switch comprises: a third switch common terminal coupled with a second signal input terminal; two third switch switching terminals respectively coupled with a first signal output terminal and a second signal output terminal; the third controllable switch is configured to, in response to the first indication signal, establish or break the coupling between the third switch common terminal and at least one third switch switching terminal, so as to output the first satellite broadcast signal received by the second signal input terminal through the signal output terminal corresponding to the at least one third switch switching terminal.

35. The display device of any of claims 25-34, wherein, the main controller is further configured to generate a first indication signal; the input path selection module comprises: a fourth controllable switch; the fourth controllable switch comprises: a fourth switch common terminal coupled with a third signal input terminal; two fourth switch switching terminals respectively coupled with a first signal output terminal and a second signal output terminal; the fourth controllable switch is configured to, in response to the first indication signal, establish or break the coupling between the fourth switch common terminal and at least one fourth switch switching terminal, so as to output the second satellite broadcast signal received by the third signal input terminal through the signal output terminal corresponding to the at least one fourth switch switching terminal.

36. The display device of any of claims 25-35, wherein, the feedback module comprises: a first feedback switch provided with: a first terminal coupled with the second signal input terminal; a second terminal coupled with the second signal demodulation module; a third terminal coupled with the first signal demodulation module; the first feedback switch is configured to perform any of: in response to the third feedback indication signal, coupling the first terminal with the second terminal, so as to couple the second signal demodulation module with the second signal input terminal; or, in response to the first feedback indication signal, coupling the first terminal with the third terminal, so as to couple the first signal demodulation module with the second signal input terminal.

37. The display device of any of claims 25-36, wherein, the feedback module comprises: a second feedback switch; the second feedback switch is provided with: a fourth terminal coupled with the third signal input terminal; a fifth terminal coupled with the first signal demodulation module; a sixth terminal coupled with the second signal demodulation module; the second feedback switch is configured to perform any of: in response to the fourth feedback indication signal, coupling the fourth terminal with the fifth terminal, so as to couple the first signal demodulation module with the third signal input terminal; or, in response to the second feedback indication signal, coupling the fourth terminal with the sixth terminal, so as to couple the second signal demodulation module with the third signal input terminal.

38. The display device of any of claims 25-35, wherein, the feedback module comprises: a third feedback switch provided with: a first terminal coupled with the second signal demodulation module; a second terminal coupled with the second signal input terminal; a third terminal coupled with the third signal input terminal; the third feedback switch is configured to perform any of: in response to the third feedback indication signal, coupling the first end with the second end to couple the second signal demodulation module with the second signal input end; or in response to the second feedback indication signal, coupling the first end with the third end to couple the second signal demodulation module with the third signal input end.

39. The display device of any one of claims 25-35 or 38, wherein, The feedback module comprises a fourth feedback switch. The fourth feedback switch is provided with: a fourth end coupled with the first signal demodulation module; a fifth end coupled with the third signal input end; a sixth end coupled with the second signal input end. The fourth feedback switch is configured to perform any one of: in response to a fourth feedback indication signal, coupling the fourth end with the fifth end to couple the first signal demodulation module with the third signal input end; or in response to a first feedback indication signal, coupling the fourth end with the sixth end to couple the first signal demodulation module with the second signal input end.

40. The display device of claim 1, wherein The first path selection module comprises an input path selection module, and the input path selection module is provided with: a first signal input end configured to receive a terrestrial broadcast signal; a second signal input end configured to receive a first satellite broadcast signal; a third signal input end configured to receive a second satellite broadcast signal; a first signal output end configured to be coupled with any one of the second signal input end and the third signal input end to output a corresponding broadcast signal; a second signal output end configured to be coupled with any one of the first signal input end, the second signal input end and the third signal input end to output a corresponding broadcast signal; a third signal output end configured to be coupled with the first signal input end to output a corresponding broadcast signal; The first demodulation module comprises: a first signal demodulation module coupled with the first signal output end and configured to perform channel demodulation on the broadcast signal output by the first signal output end to generate a TS stream; a second signal demodulation module coupled with the second signal output end and configured to perform channel demodulation on the broadcast signal output by the second signal output end to generate a TS stream; a third signal demodulation module coupled with the third signal output end and configured to perform channel demodulation on the broadcast signal output by the third signal output end to generate a TS stream; The input path selection module is further configured to: in a case where the first signal input end receives a terrestrial broadcast signal and the second signal input end receives a first satellite broadcast signal, couple the first signal input end with the third signal output end to demodulate the terrestrial broadcast signal by the third signal demodulation module; and couple the second signal input end with the first signal output end to demodulate the first satellite broadcast signal by the first signal demodulation module.

41. The display device of claim 40, wherein, The first signal demodulation module is further coupled with the second signal input end, and is configured to generate a first frequency-locked signal and feed back the first frequency-locked signal to the second signal input end; The main controller is further configured to: In a case where the second signal demodulation module demodulates the first satellite broadcast signal received through the second signal input end, send a first frequency-locked instruction signal to the first signal demodulation module to instruct the first signal demodulation module to generate the first frequency-locked signal; The first frequency-locked signal is used to lock a frequency point in the first satellite broadcast signal that is demodulated by the second signal demodulation module.

42. The display device of claim 41, wherein, The second signal demodulation module is further coupled with a third signal input end, and is configured to generate a second frequency-locked signal and feed back the second frequency-locked signal to the third signal input end; The main controller is further configured to: In a case where the first signal demodulation module demodulates the second satellite broadcast signal received through the third signal input end, send a second frequency-locked instruction signal to the second signal demodulation module to instruct the second signal demodulation module to generate the second frequency-locked signal; The second frequency-locked signal is used to lock a frequency point in the second satellite broadcast signal that is demodulated by the first signal demodulation module.

43. The display device of any one of claims 40 to 42, wherein The first signal demodulation module is further configured to generate a first frequency-locked signal; The second signal demodulation module is further configured to generate a second frequency-locked signal; The display device further comprises a feedback module; An input end of the feedback module is coupled with the first signal demodulation module and the second signal demodulation module respectively; An output end of the feedback module is coupled with the second signal input end and the third signal input end respectively; The main controller is further configured to: In a case where the second signal demodulation module demodulates the first satellite broadcast signal received through the second signal input end, send a second frequency-locked instruction signal to the second signal demodulation module to instruct the second signal demodulation module to generate a second frequency-locked signal, and send a third feedback instruction signal to the feedback module to instruct the feedback module to couple the second signal demodulation module with the second signal input end so that the second frequency-locked signal is fed back to the second signal input end; The second frequency-locked signal is used to lock a frequency point in the first satellite broadcast signal that is demodulated by the second signal demodulation module.

44. The display device of claim 43, wherein, The main controller is further configured to: In a case where the first signal demodulation module demodulates the second satellite broadcast signal received through the third signal input end, send a first frequency-locked instruction signal to the first signal demodulation module to instruct the first signal demodulation module to generate a first frequency-locked signal, and send a fourth feedback instruction signal to the feedback module to instruct the feedback module to couple the first signal demodulation module with the third signal input end so that the first frequency-locked signal is fed back to the third signal input end; The first frequency-locked signal is used to lock a frequency point in the second satellite broadcast signal that is demodulated by the first signal demodulation module.

45. The display device of any of claims 40-44, wherein, The input path selection module is configured to: In the case that the first signal input end receives the terrestrial broadcast signal, the first signal input end is coupled with the third signal output end and the second signal output end respectively, so as to demodulate the terrestrial broadcast signal by the third signal demodulation module and the second signal demodulation module respectively, and obtain two TS streams.

46. The display device of any one of claims 40 to 45, wherein, The main controller is further configured to generate a first indication signal; The input path selection module comprises: The third controllable switch comprises: The third switch common end is coupled with the second signal input end; The two third switch switching ends are respectively coupled with the first signal output end and the second signal output end correspondingly; The third controllable switch is configured to, in response to the first indication signal, establish or break the coupling between the third switch common end and at least one third switch switching end, so as to output the first satellite broadcast signal received by the second signal input end through the signal output end corresponding to the at least one third switch switching end.

47. The display device of any one of claims 40 to 46, wherein, The main controller is further configured to generate a first indication signal; The input path selection module comprises: The fourth controllable switch comprises: The fourth switch common end is coupled with the third signal input end; The two fourth switch switching ends are respectively coupled with the first signal output end and the second signal output end correspondingly; The fourth controllable switch is configured to, in response to the first indication signal, establish or break the coupling between the fourth switch common end and at least one fourth switch switching end, so as to output the second satellite broadcast signal received by the third signal input end through the signal output end corresponding to the at least one fourth switch switching end.

48. The display device of any of claims 40-47, wherein, The feedback module comprises: The first feedback switch is provided with: The first end is coupled with the second signal input end; The second end is coupled with the second signal demodulation module; The third end is coupled with the first signal demodulation module; The first feedback switch is configured to perform any one of the following: In response to the third feedback indication signal, the first end is coupled with the second end, so that the second signal demodulation module is coupled with the second signal input end; or In response to the first feedback indication signal, the first end is coupled with the third end, so that the first signal demodulation module is coupled with the second signal input end.

49. The display device of any of claims 40-48, wherein, The feedback module comprises a second feedback switch; The second feedback switch is provided with: The fourth end is coupled with the third signal input end; The fifth end is coupled with the first signal demodulation module; The sixth end is coupled with the second signal demodulation module; The second feedback switch is configured to perform any one of the following: In response to the fourth feedback indication signal, the fourth end is coupled with the fifth end, so that the first signal demodulation module is coupled with the third signal input end; or in response to the second feedback indication signal, coupling the fourth end with the sixth end to couple the second signal demodulation module with the third signal input end.

50. The display device of any of claims 40-47, wherein, The feedback module comprises: a third feedback switch, provided with: a first end coupled with the second signal demodulation module; a second end coupled with the second signal input end; a third end coupled with the third signal input end; The third feedback switch is configured to perform any one of: in response to the third feedback indication signal, coupling the first end with the second end to couple the second signal demodulation module with the second signal input end; or in response to a second feedback indication signal, coupling the first end with the third end to couple the second signal demodulation module with the third signal input end.

51. The display device of any one of claims 40-47 or 50, wherein, The feedback module comprises a fourth feedback switch; The fourth feedback switch is provided with: a fourth end coupled with the first signal demodulation module; a fifth end coupled with the third signal input end; a sixth end coupled with the second signal input end; The fourth feedback switch is configured to perform any one of: in response to a fourth feedback indication signal, coupling the fourth end with the fifth end to couple the first signal demodulation module with the third signal input end; or in response to a first feedback indication signal, coupling the fourth end with the sixth end to couple the first signal demodulation module with the second signal input end.

52. A digital video converter box, comprising: a plurality of first input ports configured to receive broadcast television signals; a first demodulation module having an input end and configured to parse the broadcast television signal received by the input end thereof to generate a first video signal; a first path selection module coupled with the plurality of first input ports and the first demodulation module and configured to input a selected broadcast television signal to a selected first demodulation module; a main controller coupled with the first demodulation module and the first path selection switch and configured to control a display device to display based on the first video signal.

Images