Display device

Abstract

Some embodiments of the invention provide a display device. The display device is provided with two demodulation modules, input path selection of broadcast signals from any signal input end to any one or two demodulation modules is achieved through the input path selection module, and parallel processing of one or more broadcast signals can be achieved. Based on different selections of the input path selection module, the display device may be in different operating modes. The display device is further provided with a feedback module, the feedback module can couple different demodulation modules with different satellite signal input ends under the control of the controller to achieve feedback control over feedback signals, and frequency locking signals used for locking satellite broadcast signals demodulated by the demodulation modules are transmitted to the feedback module in different working modes. And the signal is accurately fed back to a corresponding signal input end to realize signal locking. The display equipment can meet diversified application requirements in different scenes; there is no need to arrange excessive signal processing assemblies, and the cost is reduced.

Description

Technical Field

[0001] Some embodiments of this application relate to signal processing techniques. More specifically, they relate to a display device. Background Technology

[0002] With the development of related technologies, broadcast signals have become increasingly diverse, including terrestrial broadcast signals, cable signals, and satellite broadcast signals. Display devices can be configured with multiple input ports to receive different broadcast signals.

[0003] Different broadcast signals can share a single signal processing component to perform tuning, demodulation, and other processing on the input broadcast signal to obtain the corresponding video signal. However, this method can only process one broadcast signal at a time.

[0004] To meet the requirements of multi-channel signal processing such as recording and playback, the display device can be configured with multiple sets of signal processing components. For example, if two sets of signal processing components are configured for each input port, the two broadcast signals input from any two input ports can be processed into corresponding video signals respectively. Alternatively, a broadcast signal input from one input port can be processed into two video signals by the corresponding two sets of signal processing components.

[0005] Clearly, the more signal processing components there are, the higher the cost of the display device, and the lower the utilization rate of each signal processing component, resulting in redundancy and waste. Therefore, how to balance the cost of the display device with the needs of multi-channel signal processing is an urgent problem to be solved. Summary of the Invention

[0006] Some embodiments of this application provide a display device that balances the cost of the display device with the need for multi-channel signal processing.

[0007] Some embodiments of this application provide a display device, including:

[0008] The input path selection module has the following settings:

[0009] The second signal input terminal is configured to receive the first satellite broadcast signal;

[0010] The third signal input terminal is configured to receive the second satellite broadcast signal;

[0011] First signal output terminal; and,

[0012] Second signal output terminal;

[0013] The input path selection module is configured to couple the second signal input terminal to at least one of the first signal output terminal and the second signal output terminal; and to couple the third signal input terminal to at least one of the first signal output terminal and the second signal output terminal.

[0014] The first signal demodulation module, coupled to the first signal output terminal, is configured to perform channel demodulation on the broadcast signal output through the first signal output terminal to obtain a TS stream, and can generate a first frequency-locked signal.

[0015] The second signal demodulation module, coupled to the second signal output terminal, is configured to perform channel demodulation on the broadcast signal output through the second signal output terminal to obtain a TS stream, and can generate a second frequency-locked signal;

[0016] Feedback module;

[0017] The input terminal of the feedback module can be coupled to the first signal demodulation module and the second signal demodulation module; the output terminal of the feedback module can be coupled to the second signal input terminal and the third signal input terminal.

[0018] The controller is configured as follows:

[0019] When the second signal demodulation module demodulates the first satellite broadcast signal received through the second signal input terminal, a second frequency locking indication signal is sent to the second signal demodulation module to instruct the second signal demodulation module to generate a second frequency locking signal; and a third feedback indication signal is sent to the feedback module to instruct the feedback module to couple the second signal demodulation module to the second signal input terminal so that the second frequency locking signal is fed back to the second signal input terminal.

[0020] The second frequency-locking signal is used to lock the frequency point in the first satellite broadcast signal that has been demodulated by the second signal demodulation module.

[0021] The display device provided in the above embodiments is configured with two demodulation modules. The input path selection module enables the selection of the input path of the broadcast signal from any signal input terminal to any one or two demodulation modules. This allows for the parallel processing of one or more broadcast signals, forming a variety of different application scenarios to meet users' needs for playing, recording, and recording and playing TV programs. It does not require setting up too many signal processing components, thus reducing the cost of the display device.

[0022] In addition, the display device is also equipped with a feedback module. Under the control of the feedback indication signal sent by the controller, the feedback module can select different feedback paths from different demodulation modules to different satellite signal input terminals, so that the frequency locking signal can be accurately fed back to the corresponding signal input terminal in different working modes to achieve signal locking.

[0023] In this embodiment, when the second signal demodulation module demodulates the first satellite broadcast signal received through the second signal input terminal, if the conventional frequency locking control process is followed, the second frequency locking signal generated by the second signal demodulation module can only be fed back to the third signal input terminal, and cannot lock the corresponding frequency point in the first satellite broadcast signal demodulated by the second signal demodulation module. To address this, the display device provided in the above embodiment sends a third feedback indication signal to the feedback module through the controller, instructing the feedback module to couple the second signal demodulation module to the second signal input terminal, thereby feeding back the second frequency locking signal generated by the second signal demodulation module to the second signal input terminal, achieving the locking of the corresponding frequency point in the first satellite broadcast signal demodulated by the second signal demodulation module.

[0024] In some embodiments, the controller is further configured to:

[0025] When the first signal demodulation module demodulates the second satellite broadcast signal received through the third signal input terminal, a first frequency locking indication signal is sent to the first signal demodulation module to instruct the first signal demodulation module to generate a first frequency locking signal; and a fourth feedback indication signal is sent to the feedback module to instruct the feedback module to couple the first signal demodulation module to the third signal input terminal, and the first frequency locking signal is fed back to the third signal input terminal to lock the frequency point in the second satellite broadcast signal that was demodulated by the first signal demodulation module.

[0026] In the above embodiments, when the first signal demodulation module demodulates the second satellite broadcast signal received through the third signal input terminal, the controller sends a fourth feedback indication signal to the feedback module, instructing the feedback module to couple the first signal demodulation module to the third signal input terminal, thereby feeding back the first frequency-locking signal generated by the first signal demodulation module to the third signal input terminal, and realizing the locking of the corresponding frequency point in the second satellite broadcast signal demodulated by the first signal demodulation module.

[0027] In some embodiments, the feedback module is configured to:

[0028] The feedback input terminal is coupled to the first signal demodulation module and the second signal demodulation module, respectively;

[0029] The feedback output terminal is coupled to the second signal input terminal and the third signal input terminal, respectively.

[0030] The third feedback path and the fourth feedback path are located between the feedback input terminal and the feedback output terminal;

[0031] The feedback module is configured to select the third feedback path in response to the third feedback indication signal, and to select the fourth feedback path in response to the fourth feedback indication signal;

[0032] The controller is configured as follows:

[0033] When the second signal demodulation module demodulates the first satellite broadcast signal received through the second signal input terminal, it sends the third feedback indication signal to the feedback module to instruct the feedback module to select the third feedback path, thereby coupling the second signal demodulation module to the second signal input terminal and feeding back the second frequency-locked signal to the second signal input terminal.

[0034] In the above embodiments, the feedback module can be configured with a feedback input terminal and a feedback output terminal, and multiple feedback paths can be provided between the feedback input terminal and the feedback output terminal. These include a third feedback path for coupling the second signal demodulation module to the second signal input terminal, and a fourth feedback path for coupling the first signal demodulation module to the third signal input terminal. When the second signal demodulation module demodulates the first satellite broadcast signal received through the second signal input terminal, the controller can send a third feedback indication signal to the feedback module, instructing the feedback module to select the third feedback path. This allows the second frequency-locking signal generated by the second signal demodulation module to be fed back to the second signal input terminal, thereby locking the frequency points demodulated by the second signal demodulation module in the first satellite broadcast signal.

[0035] In some embodiments, the controller is configured to:

[0036] When the first signal demodulation module demodulates the second satellite broadcast signal received through the third signal input terminal, it sends the fourth feedback indication signal to the feedback module to instruct the feedback module to select the fourth feedback path, thereby coupling the first signal demodulation module with the third signal input terminal and feeding the first frequency-locked signal back to the third signal input terminal.

[0037] In the above embodiments, since the fourth feedback path of the feedback module is used to couple the first signal demodulation module to the third signal input terminal, when the first signal demodulation module demodulates the second satellite broadcast signal received through the third signal input terminal, the controller can send a fourth feedback indication signal to the feedback module to instruct the feedback module to select the fourth feedback path, so that the first frequency locking signal generated by the first signal demodulation module can be fed back to the third signal input terminal, thereby locking the frequency point demodulated by the first signal demodulation module in the second satellite broadcast signal.

[0038] In some embodiments, the feedback module is configured to:

[0039] The first feedback input terminal is coupled to the first signal demodulation module;

[0040] The second feedback input terminal is coupled to the second signal demodulation module;

[0041] The first feedback output terminal is coupled to the second signal input terminal;

[0042] The second feedback output terminal is coupled to the third signal input terminal;

[0043] The third feedback path is provided between the second feedback input terminal and the first feedback output terminal; the fourth feedback path is provided between the first feedback input terminal and the second feedback output terminal.

[0044] In the above embodiments, the feedback module can be provided with two feedback input terminals and two feedback output terminals. A corresponding feedback path can be set between any feedback input terminal and any feedback output terminal, thereby achieving coupling between any demodulation module and any signal input terminal. Specifically, a third feedback path can be provided between the second feedback input terminal and the first feedback output terminal to couple the second signal demodulation module to the second signal input terminal, thereby feeding back the second frequency-locked signal generated by the second signal demodulation module to the second signal input terminal to achieve locking of the corresponding signal. Furthermore, a fourth feedback path can be provided between the first feedback input terminal and the second feedback output terminal to couple the first signal demodulation module to the third signal input terminal, thereby feeding back the first frequency-locked signal generated by the first signal demodulation module to the third signal input terminal to achieve locking of the corresponding signal.

[0045] In some embodiments, when the first satellite broadcast signal is received at the second signal input terminal, the input path selection module is configured to:

[0046] The second signal input terminal is coupled to the first signal output terminal and the second signal output terminal respectively, so that the first satellite broadcast signal can be demodulated by the first signal demodulation module and the second signal demodulation module respectively;

[0047] The controller is configured as follows:

[0048] Send a first frequency-locking indication signal to the first signal demodulation module to instruct the first signal demodulation module to generate the first frequency-locking signal;

[0049] Send a second frequency-locking indication signal to the second signal demodulation module to instruct the second signal demodulation module to generate the second frequency-locking signal;

[0050] Send a first feedback indication signal and a third feedback indication signal to the feedback module, instructing the feedback module to couple the first signal demodulation module and the second signal demodulation module to the second signal input terminal respectively, so that the first frequency locking signal and the second frequency locking signal are both fed back to the second signal input terminal, thereby locking the corresponding frequency point in the first satellite broadcast signal.

[0051] In the above embodiments, the controller sends a feedback indication signal to the feedback module, instructing the feedback module to establish a first feedback path from the first signal demodulation module to the second signal input terminal, and a third feedback path from the second signal demodulation module to the second signal input terminal. This enables both the first frequency-locking signal and the second frequency-locking signal to be fed back to the second signal input terminal, respectively locking two different frequency points in the first satellite broadcast signal, thus meeting the user's requirement for recording and broadcasting one Unitable standard DVB-S / S2 signal.

[0052] In some embodiments, when the second signal input terminal receives the first satellite broadcast signal and the third signal input terminal receives the second satellite broadcast signal, the input path selection module is configured to:

[0053] The second signal input terminal is coupled to the first signal output terminal, and the third signal input terminal is coupled to the second signal output terminal, so as to demodulate the first satellite broadcast signal through the first signal demodulation module and demodulate the second satellite broadcast signal through the second signal demodulation module;

[0054] The controller is configured as follows:

[0055] Send a first frequency-locking indication signal to the first signal demodulation module to instruct the first signal demodulation module to generate the first frequency-locking signal;

[0056] Send a second frequency-locking indication signal to the second signal demodulation module to instruct the second signal demodulation module to generate the second frequency-locking signal;

[0057] A first feedback indication signal and a second feedback indication signal are sent to the feedback module, respectively instructing the feedback module to couple the first signal demodulation module to the second signal input terminal and the second signal demodulation module to the third signal input terminal, so that the first frequency locking signal is fed back to the second signal input terminal and the second frequency locking signal is fed back to the third signal input terminal, thereby locking the corresponding frequency points in the first satellite broadcast signal and the second satellite broadcast signal.

[0058] In the above embodiments, the controller sends a feedback indication signal to the feedback module, instructing the feedback module to establish a first feedback path from the first signal demodulation module to the second signal input terminal, and a second feedback path from the second signal demodulation module to the third signal input terminal. This enables the first frequency-locking signal to be fed back to the second signal input terminal and the second frequency-locking signal to the third signal input terminal, respectively locking the corresponding frequency points of the two satellite broadcast signals received by the two signal input terminals, thus satisfying the user's requirement for recording and broadcasting the two DVB-S / S2 signals received by the two signal input terminals.

[0059] In some embodiments, the input path selection module is further provided with:

[0060] The first signal input terminal is configured to receive terrestrial broadcast signals;

[0061] When the first signal input terminal receives a ground broadcast signal first, and the second signal input terminal subsequently receives the first satellite broadcast signal, the input path selection module is configured as follows:

[0062] The first signal input terminal is coupled to the first signal output terminal so as to demodulate the terrestrial broadcast signal through the first signal demodulation module;

[0063] The second signal input terminal is coupled to the second signal output terminal so as to demodulate the first satellite broadcast signal through the second signal demodulation module;

[0064] The controller is configured as follows:

[0065] Send a second frequency-locking indication signal to the second signal demodulation module to instruct the second signal demodulation module to generate the second frequency-locking signal;

[0066] A second feedback indication signal is sent to the feedback module, instructing the feedback module to couple the second signal demodulation module to the second signal input terminal, so that the second frequency locking signal is fed back to the second signal input terminal, thereby locking the corresponding frequency point in the first satellite broadcast signal.

[0067] In the above embodiments, when a ground broadcast signal is first received through the first signal input terminal and a satellite broadcast signal is then received through the second signal input terminal, the controller sends a feedback indication signal to the feedback module, instructing the feedback module to establish a third feedback path from the second signal demodulation module to the second signal input terminal, thereby feeding back the second frequency-locking signal to the second signal input terminal, locking the corresponding satellite broadcast signal, and realizing one recording and one broadcast.

[0068] In some embodiments, the input path selection module is further provided with:

[0069] The first signal input terminal is configured to receive terrestrial broadcast signals;

[0070] When the second signal input terminal receives the first satellite broadcast signal first, and the first signal input terminal then receives the ground broadcast signal, the input path selection module is configured as follows:

[0071] The second signal input terminal is coupled to the first signal output terminal so as to demodulate the first satellite broadcast signal through the first signal demodulation module;

[0072] The first signal input terminal is coupled to the third signal output terminal to demodulate the terrestrial broadcast signal through the third signal demodulation module; the controller is configured to:

[0073] Send a first frequency-locking indication signal to the first signal demodulation module to instruct the first signal demodulation module to generate the first frequency-locking signal;

[0074] A first feedback indication signal is sent to the feedback module, instructing the feedback module to couple the first signal demodulation module to the second signal input terminal, so that the first frequency locking signal is fed back to the second signal input terminal, thereby locking the corresponding frequency point in the first satellite broadcast signal.

[0075] In the above embodiment, when a satellite broadcast signal is received first at the second signal input terminal and a terrestrial broadcast signal is received at the first signal input terminal, the controller sends a feedback indication signal to the feedback module, instructing the feedback module to establish a first feedback path from the first signal demodulation module to the second signal input terminal, thereby feeding back the first frequency-locking signal to the second signal input terminal, locking the corresponding satellite broadcast signal, and realizing one recording and one broadcast.

[0076] In some embodiments, the controller is further configured to generate a first indication signal;

[0077] The input path selection module includes:

[0078] A third controllable switch; the third controllable switch includes:

[0079] The common terminal of the third switch is coupled to the second signal input terminal;

[0080] Two third switch terminals are respectively coupled to the first signal output terminal and the second signal output terminal; the third controllable switch is configured to establish or disconnect the coupling between the third switch common terminal and at least one third switch terminal in response to the first indication signal, so as to output the first satellite broadcast signal received by the second signal input terminal through the signal output terminal corresponding to at least one third switch terminal.

[0081] In some embodiments, the controller is further configured to generate a first indication signal;

[0082] The input path selection module includes:

[0083] The fourth controllable switch; the fourth controllable switch includes:

[0084] The common terminal of the fourth switch is coupled to the third signal input terminal;

[0085] The two fourth switch terminals are respectively coupled to the first signal output terminal and the second signal output terminal.

[0086] The fourth controllable switch is configured to, in response to the first indication signal, establish or disconnect the coupling between the common terminal of the fourth switch 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 at least one fourth switch switching terminal.

[0087] The display device in the above embodiments has one or two controllable switches in the input path selection module that can be controlled by the controller. This allows for selection of the input path for satellite broadcast signals received from one or two signal input terminals. This enables satellite broadcast signals input from any signal input terminal to be output through any one or two signal output terminals, giving the display device multiple different operating modes. It also allows users to choose any signal input terminal to connect the display device to a coaxial cable that transmits satellite broadcast signals, reducing restrictions on user wiring operations and improving the user experience.

[0088] In some embodiments, the feedback module includes:

[0089] The first feedback switch is configured with:

[0090] The first terminal is coupled to the second signal input terminal;

[0091] The second end is coupled to the second signal demodulation module;

[0092] The third terminal is coupled to the first signal demodulation module;

[0093] The first feedback switch is configured to perform any of the following:

[0094] In response to the third feedback indication signal, the first terminal is coupled to the second terminal, so that the second signal demodulation module is coupled to the second signal input terminal; or,

[0095] In response to a first feedback indication signal, the first terminal is coupled to the third terminal so that the first signal demodulation module is coupled to the second signal input terminal.

[0096] In the above embodiments, the first feedback switch can respond to different feedback indication signals to couple the second signal input terminal with either of the two demodulation modules, that is, to establish a first feedback path or a third feedback path. Thus, the frequency-locking signals generated by the two demodulation modules can be fed back to the second signal input terminal to lock the corresponding frequency point in the relevant satellite broadcast signal.

[0097] In some embodiments, the feedback module includes: a second feedback switch;

[0098] The second feedback switch is equipped with:

[0099] The fourth terminal is coupled to the third signal input terminal;

[0100] The fifth terminal is coupled to the first signal demodulation module;

[0101] The sixth terminal is coupled to the second signal demodulation module;

[0102] The second feedback switch is configured to perform any of the following:

[0103] In response to a fourth feedback indication signal, the fourth terminal is coupled to the fifth terminal, so that the first signal demodulation module is coupled to the third signal input terminal; or,

[0104] In response to the second feedback indication signal, the fourth terminal is coupled to the sixth terminal so that the second signal demodulation module is coupled to the third signal input terminal.

[0105] In the above embodiments, a second feedback switch is provided in the feedback module. The second feedback switch can respond to different feedback indication signals to realize the coupling of the third signal input terminal with either of the two demodulation modules, so that the frequency locking signals generated by the two demodulation modules can be fed back to the third signal input terminal, thereby realizing the locking of the corresponding frequency point in the relevant satellite broadcast signal, enabling the display device to realize more working modes and providing users with a richer experience.

[0106] In some embodiments, the feedback module includes a third feedback switch; the third feedback switch is configured to:

[0107] The first end is coupled to the second signal demodulation module;

[0108] The second terminal is coupled to the second signal input terminal;

[0109] The third terminal is coupled to the third signal input terminal;

[0110] The third feedback switch is configured to perform any of the following:

[0111] In response to the third feedback indication signal, the first terminal is coupled to the second terminal, so that the second signal demodulation module is coupled to the second signal input terminal; or,

[0112] In response to a second feedback indication signal, the first terminal is coupled to the third terminal so that the second signal demodulation module is coupled to the third signal input terminal.

[0113] In the above embodiments, the third feedback switch can respond to different feedback indication signals to couple the second signal demodulation module with either the second signal input terminal or the third signal input terminal, so that the second frequency-locking signal generated by the second signal demodulation module can be fed back to the second signal input terminal or the third signal input terminal as needed, thereby locking the corresponding frequency point in the relevant satellite broadcast signal.

[0114] In some embodiments, the feedback module includes: a fourth feedback switch; the fourth feedback switch is configured with:

[0115] The fourth terminal is coupled to the first signal demodulation module;

[0116] The fifth terminal is coupled to the third signal input terminal;

[0117] The sixth terminal is coupled to the second signal input terminal;

[0118] The fourth feedback switch is configured to perform any of the following:

[0119] In response to a fourth feedback indication signal, the fourth terminal is coupled to the fifth terminal, so that the first signal demodulation module is coupled to the third signal input terminal; or,

[0120] In response to the first feedback indication signal, the fourth terminal is coupled to the sixth terminal so that the first signal demodulation module is coupled to the second signal input terminal.

[0121] In the above embodiments, a fourth feedback switch is provided in the feedback module. The fourth feedback switch can respond to different feedback indication signals to couple the first signal demodulation module with either the second signal input terminal or the third signal input terminal. This allows the first frequency-locking signal generated by the first signal demodulation module to be fed back to the second signal input terminal or the third signal input terminal as needed, thereby locking the corresponding frequency point in the relevant satellite broadcast signal. This enables the display device to achieve more working modes and provides users with a richer experience. Attached Figure Description

[0122] To more clearly illustrate the implementation methods in some embodiments or related technologies of this application, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings.

[0123] Figure 1 This is a schematic diagram illustrating an operational scenario between a display device and a control device according to some embodiments;

[0124] Figure 2 An exemplary block diagram of the configuration of the control device according to an exemplary embodiment is shown;

[0125] Figure 3 An exemplary schematic diagram of the display device is shown;

[0126] Figure 4 This application provides a schematic diagram of the structure of a display device according to some embodiments;

[0127] Figure 5 This is a schematic diagram of the structure of another display device provided in some embodiments of this application;

[0128] Figure 6 This is a schematic diagram of the structure of another display device provided in some embodiments of this application;

[0129] Figure 7 This is a schematic diagram of the structure of another display device provided in some embodiments of this application;

[0130] Figure 8 This is a schematic diagram of the structure of another display device provided in some embodiments of this application;

[0131] Figure 9 This is a schematic diagram of the structure of another display device provided in some embodiments of this application;

[0132] Figure 10 This is a schematic diagram of the structure of another display device provided in some embodiments of this application; Figure 11a This is a schematic diagram of the structure of another display device provided in some embodiments of this application; Figure 11b This is a schematic diagram of the structure of another display device provided in some embodiments of this application; Figure 11c This is a schematic diagram of the structure of another display device provided in some embodiments of this application;

[0133] Figure 12a This is a schematic diagram of the structure of another display device provided in some embodiments of this application;

[0134] Figure 12bThis is a schematic diagram of the structure of another display device provided in some embodiments of this application;

[0135] Figure 13 This is a schematic diagram of the structure of another display device provided in some embodiments of this application;

[0136] Figure 14a This is a schematic diagram of the structure of another display device provided in some embodiments of this application;

[0137] Figure 14b This is a schematic diagram of the structure of another display device provided in some embodiments of this application;

[0138] Figure 15 This is a schematic diagram of the structure of another display device provided in some embodiments of this application;

[0139] Figure 16a This is a schematic diagram of the structure of another display device provided in some embodiments of this application;

[0140] Figure 16b This is a schematic diagram of the structure of another display device provided in some embodiments of this application;

[0141] Figure 16c This is a schematic diagram of the structure of another display device provided in some embodiments of this application;

[0142] Figure 16d This is a schematic diagram of the structure of another display device provided in some embodiments of this application;

[0143] Figure 16e This is a schematic diagram of the structure of another display device provided in some embodiments of this application;

[0144] Figure 17 This is a schematic diagram of the structure of another display device provided in some embodiments of this application;

[0145] Figure 18 This is a schematic diagram of the structure of another display device provided in some embodiments of this application;

[0146] Figure 19 This is a schematic diagram of an operating mode of a display device provided in some embodiments of this application;

[0147] Figure 20 This is a schematic diagram illustrating yet another operating mode of the display device provided in some embodiments of this application;

[0148] Figure 21 This is a schematic diagram illustrating yet another operating mode of the display device provided in some embodiments of this application;

[0149] Figure 22This is a schematic diagram illustrating yet another operating mode of the display device provided in some embodiments of this application;

[0150] Figure 23 This is a schematic diagram of the structure of another display device provided in some embodiments of this application;

[0151] Figure 24 This is a schematic diagram of the structure of another display device provided in some embodiments of this application;

[0152] Figure 25 This is a schematic diagram of the structure of another display device provided in some embodiments of this application;

[0153] Figure 26 This is a schematic diagram of the structure of another display device provided in some embodiments of this application;

[0154] Figure 27 This is a schematic diagram of the structure of another display device provided in some embodiments of this application;

[0155] Figure 28 This is a schematic diagram of the structure of another display device provided in some embodiments of this application;

[0156] Figure 29 This is a schematic diagram of the structure of another display device provided in some embodiments of this application;

[0157] Figure 30 This is a schematic diagram of the structure of another display device provided in some embodiments of this application;

[0158] Figure 31 This is a schematic diagram of the structure of another display device provided in some embodiments of this application. Detailed Implementation

[0159] To make the objectives, implementation methods and advantages of this application clearer, the exemplary implementation methods of this application will be clearly and completely described below with reference to the accompanying drawings of the exemplary embodiments of this application. Obviously, the described exemplary embodiments are only some embodiments of this application, and not all embodiments.

[0160] It should be noted that the brief descriptions of terms in this application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise stated, these terms should be understood in their ordinary and common meaning.

[0161] Furthermore, the terms “including” and “having”, and any variations thereof, are intended to cover but not exclusively include, for example, a product or device that includes a series of components is not necessarily limited to those components that are clearly listed, but may include other components that are not clearly listed or that are inherent to such product or device.

[0162] Definitions:

[0163] DVB-T (Digital Video Broadcasting-Terrestrial) is a widely used terrestrial digital television standard in Europe.

[0164] DVB-T2 (Digital Video Broadcasting-Terrestrial 2) is the second-generation European digital terrestrial television broadcasting standard.

[0165] DVB-C (Digital Video Broadcasting-Cable) is a digital cable television broadcasting standard.

[0166] DVB-S (Digital Video Broadcasting-Satellite) is a digital satellite television broadcasting standard that has developed rapidly in recent years. It is a form of broadcast television that uses geostationary satellites to transmit digitally encoded and compressed television signals to users.

[0167] DVB-S2 (Digital Video Broadcasting-Satellite-second generation) is the second-generation digital satellite television broadcasting standard.

[0168] Unicable (a combination of Uni- and cable) is a European industry standard designed to enable communication between satellite peripherals and satellite receivers using only a single coaxial cable, simplifying installation and reducing costs. Its core principle is the ability to move frequencies to any location within the 950MHz-2150MHz band, and multiple frequencies can be moved to multiple different locations within the 950MHz-2150MHz band. This allows for the simultaneous transmission of satellite broadcast signals from multiple frequencies via a single coaxial cable without interference. Devices that achieve this frequency transfer based on the Unicable standard are called Unicable devices.

[0169] The display device provided in this application can have various implementation forms, such as a smart TV, a laser projection device, a monitor, an electronic bulletin board, an electronic table, etc. Figure 1 This is a schematic diagram illustrating an operational scenario between a display device and a control device according to some embodiments of this application. Figure 1 As shown, the user can operate the display device 200 through the smart device 300 or the control device 100.

[0170] In some embodiments, the control device 100 may be a remote control. Communication between the remote control and the display device may include infrared protocol communication, Bluetooth protocol communication, or other short-range communication methods, controlling the display device 200 wirelessly or via wired means. Users can control the display device 200 by inputting user commands through buttons on the remote control, voice input, control panel input, etc.

[0171] In some embodiments, a smart device 300 (such as a mobile terminal, tablet computer, computer, laptop computer, etc.) may be used to control the display device 200. For example, an application running on the smart device may be used to control the display device 200. In some embodiments, the display device may receive instructions not through the aforementioned smart device or control device, but through touch or gestures.

[0172] 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, it can be controlled by directly receiving the user's voice commands through a module configured inside the display device 200 for acquiring voice commands, or it can be controlled by receiving the user's voice commands through a voice control device set outside the display device 200.

[0173] In some embodiments, the display device 200 also communicates with the server 400. The display device 200 may be communicatively coupled via a local area network (LAN), wireless local area network (WLAN), and other networks. The server 400 may provide various content and interactive features to the display device 200. The server 400 may be a cluster or multiple clusters, and may include one or more types of servers.

[0174] Figure 2 An exemplary block diagram of the configuration of the control device 100 according to an exemplary embodiment is shown.

[0175] In some embodiments, such as Figure 2 As shown, the control device 100 may include at least one of a controller 110, a communication interface 130, a user input / output interface 140, a memory, and a power supply circuit. In some embodiments, the control device 100 may receive user input operation commands and convert the operation commands into commands that the display device 200 can recognize and respond to, thereby acting as an intermediary for interaction between the user and the display device 200.

[0176] Figure 3 An exemplary schematic diagram of the display device is shown.

[0177] In some embodiments, such as Figure 3As shown, the display device 200 may include at least one of the following: 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.

[0178] In some embodiments, such as Figure 3 As shown, the controller 250 may include a processor, such as at least one of a video processor, an audio processor, a graphics processor, RAM, and ROM.

[0179] In some embodiments, such as Figure 3 As shown, the display 260 may include a display screen component for presenting an image. For example, a driving component for driving image display, a component for receiving image signals from a controller output, and a component for displaying video content, image content, a menu control interface, and a user-controlled UI interface. In some embodiments, such as Figure 3 As shown, the display 260 can be a liquid crystal display, an OLED display, or a projection display. In other embodiments, such as Figure 3 As shown, the display 260 can be a projection device and a projection screen.

[0180] In some embodiments, such as Figure 3 As shown, the communicator 220 is a component used to communicate with external devices or servers according to various communication protocol types. For example, the communicator may include at least one of the following: a Wi-Fi 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 the transmission and reception of control signals and data signals with the external control device 100 or the server 400 through the communicator 220.

[0181] In some embodiments, such as Figure 3 As shown, the user interface can be used to receive control signals from the control device 100 (such as an infrared remote control).

[0182] In some embodiments, such as Figure 3 As shown, detector 230 can be used to collect signals from the external environment or to interact with the outside world. For example, detector 230 may include a light receiver, a sensor for collecting ambient light intensity; or, detector 230 may include an image acquisition device, such as a camera, for collecting external environmental scenes, user attributes, or user interaction gestures; or, detector 230 may include a sound acquisition device, such as a microphone, for receiving external sounds.

[0183] In some embodiments, the external device interface 240 may include, but is not limited to, one or more interfaces such as High Definition Multimedia Interface (HDMI), analog or data high-definition component input interface (component), composite video input interface (CVBS), USB input interface (USB), RGB port, etc. It may also be a composite input / output interface formed by multiple interfaces mentioned above.

[0184] In some embodiments, the signal converter 210 receives broadcast signals via wired or wireless means and demodulates audio and video signals, such as EPG data signals, from multiple wireless or wired broadcast signals. In some embodiments, the controller 250 and the signal converter 210 may be located in different separate devices, that is, the signal converter 210 may also be located in an external device of the main device where the controller 250 is located, such as an external digital video converter box.

[0185] In some embodiments, the controller 250 controls the operation of the display device and responds to user operations via various software control programs stored in memory. The controller 250 controls the overall operation of the display device 200. For example, in response to receiving a user command to select a UI object to display on the display 260, the controller 250 can perform operations related to the object selected by the user command.

[0186] In some embodiments, the controller may include at least one of a central processing unit (CPU), a video processor, an audio processor, a graphics processing unit (GPU), RAM (random access memory), ROM (read-only memory), a first to an nth interface for input / output, a communication bus, etc.

[0187] In some embodiments, a user can input user commands through a graphical user interface (GUI) displayed on the display 260, and the user input interface receives the user input commands through the GUI. In other embodiments, a user can input user commands by inputting specific sounds or gestures, and the user input interface receives the user input commands by recognizing the sounds or gestures through sensors.

[0188] The "user interface" is the medium through which applications or operating systems interact and exchange information with users. It converts information from its internal form to a form that users can accept. A common form of user interface is the graphical user interface (GUI), which refers to a user interface related to computer operation displayed graphically. It can be an icon, window, control, or other interface element displayed on the screen of an electronic device. Controls can include visual interface elements such as icons, buttons, menus, tabs, text boxes, dialog boxes, status bars, navigation bars, and widgets.

[0189] In some embodiments, the display device may include a backlight assembly, wherein the backlight assembly is coupled to a power supply circuit. The backlight assembly may be configured to provide backlighting to the display panel.

[0190] In some embodiments, the display device may include: a motherboard, the motherboard may include: Figure 3 The signal converter 210, communicator 220, detector 230, external device interface 240, controller 250, audio output interface 270, memory, and user interface shown are at least one of the following:

[0191] In related technologies, the display device is equipped with an input port for connecting to terrestrial broadcast / cable signals. To improve user experience, some regions have introduced satellite broadcast signals. Since satellite broadcast signals are provided by satellites, users need to manually connect different plugs to the input port if they want to receive different types of signals. This results in low intelligence of the display device and a poor user experience.

[0192] Therefore, some embodiments of this application provide a display device including multiple signal input ports, a first path selection module, and a first demodulation module. The multiple signal input ports are coupled to corresponding first demodulation modules through the first path selection module. The first path selection module can connect the selected broadcast signal to the selected first demodulation module based on the user's selection. Thus, when changing signals, the user does not need to manually plug and unplug signal connectors; different signals can be accessed simply by selection. Therefore, this embodiment provides intelligent display device functionality, thereby improving the user experience.

[0193] The technical solutions of this application will be described in detail below with reference to specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0194] Figure 4 Schematic diagram of the structure of the display device provided in some embodiments of this application Figure 1 .

[0195] In some embodiments, such as Figure 4 As shown, the display device includes multiple first input ports 251a, each configured to receive a broadcast signal. Each first input port 251a receives one broadcast signal.

[0196] Among them, for multiple first input ports 251a, some first input ports 251a can receive broadcast signals at the same time, or all first input ports 251a can receive broadcast signals at the same time.

[0197] In some embodiments, the plurality of first input ports 251a may be identical, i.e., the plurality of input ports have the same specification.

[0198] In some other embodiments, the plurality of first input ports 251a may not be identical to accommodate different signal inputs. For example, some of the plurality of first input ports 251a may be threadedly coupled, while others may be bayonet-coupled.

[0199] In some embodiments, the broadcast signal includes terrestrial broadcast signals, cable signals, and satellite broadcast signals. Specifically, the terrestrial broadcast signal may include a DVB-T / T2 signal, the cable signal may include a DVB-C signal, and the satellite broadcast signal may include a DVB-S / S2 signal.

[0200] The terrestrial broadcast signal is similar to the wired signal and can be accessed through the first input port coupled by the bayonet. For ease of description, the terrestrial broadcast signal and the wired signal are referred to together as DVB-T / T2 / C signal.

[0201] Terrestrial broadcast signals / cable signals are transmitted by television stations and constitute one broadcast signal. Satellite broadcast signals are provided by satellites and can be multiple broadcast signals provided by multiple satellites.

[0202] It should be noted that, for satellite broadcast signals, in traditional standards, the signal provided by each satellite is connected to the first input port via a coaxial cable. In newer European standards, such as the Unicanable standard, signals from multiple satellites are connected to a frequency converter. This frequency converter performs frequency conversion on the signals from multiple satellites to generate a single satellite broadcast signal containing multiple different frequencies, each provided by a different satellite. The frequency converter can be a Unicanable device or a Jess device (an upgraded version of the Unicanable device), etc.

[0203] The satellite broadcast signal is connected to the first input port of the display device through a coaxial cable. The display device identifies the signals provided by different satellites through different frequencies. In other words, in the new standard, signals provided by multiple satellites are connected to the first input port through a coaxial cable.

[0204] In the embodiments provided in this application, each first input port receives one broadcast signal. As can be seen from the above examples, the signals received by the first input port can include various types. Specifically, each first input port can be coupled to a coaxial cable under the new standard to receive satellite broadcast signals from multiple satellites; it can also be coupled to a coaxial cable under the traditional standard to receive satellite broadcast signals from one satellite; or it can receive terrestrial broadcast signals / wired signals.

[0205] In some embodiments, such as Figure 5 The display device shown has multiple first input ports 251a disposed on a single receiving terminal.

[0206] The above embodiments provide an exemplary description of the access modes for broadcast signals.

[0207] In some embodiments, one of the plurality of first input ports 251a receives any kind of broadcast signal, while the remaining first input ports 251a do not receive broadcast signals.

[0208] In some other embodiments, two of the plurality of first input ports 251a receive broadcast signals. For example, one receives terrestrial broadcast signals / wired signals, and the other receives satellite broadcast signals output from coaxial cables under conventional or new standards. As another example, one receives satellite broadcast signals output from coaxial cables under conventional standards, and the other receives satellite broadcast signals output from coaxial cables under new standards.

[0209] In some embodiments, at least three of the plurality of first input ports 251a receive broadcast signals. For example, one receives terrestrial broadcast signals / wired signals, one receives satellite broadcast signals output from a coaxial cable under the new standard, and at least one remaining first input port 251a receives satellite broadcast signals output from a coaxial cable under the traditional standard.

[0210] In some embodiments of this application, the access modes for broadcast signals include, but are not limited to, the methods described above.

[0211] In some embodiments, refer to Figure 5 The display device also includes a first demodulation module 253a, wherein the first demodulation module 253a has an input terminal. The first demodulation module 253a is configured to parse the broadcast signal received at its own input terminal to generate a first video signal.

[0212] Specifically, the first demodulation module 253a may include a demodulator.

[0213] Furthermore, the number of first demodulation modules 253a can be one or more.

[0214] In some embodiments, such as Figure 4 , Figure 5 As shown, the display device also includes a first path selection module 252, which is coupled to a plurality of first input ports 251a and a first demodulation module 253a.

[0215] In some embodiments, the first path selection module 252 is configured to connect the selected broadcast signal to the selected first demodulation module 253a.

[0216] In some embodiments, the display device further includes a main controller 254 coupled to the first demodulation module 253a and the first path selection module 252, configured to provide a first indication signal and control the display device to display based on the first video signal.

[0217] In some embodiments, the main controller 254 may be a system on a chip (SOC) and may be part of the controller 250.

[0218] In some embodiments, the receiving terminal, the first path selection module 252, and the first demodulation module 253a may be inside the display device or installed in a digital video converter box that is part of the display device.

[0219] It should be noted that when the display device displays based on the first video signal, it can either play the video directly based on the first video signal, or it can record the first video signal first, and then play the recorded first video signal when needed. For example, in some scenarios, a football match and a news program are broadcast simultaneously. A user can record the news program while watching the football match and then watch it again later based on the recorded first video signal. In other scenarios, the display device can also record multiple first video signals. Furthermore, the main controller 254 can determine the first video signal to record or play based on the user's selection.

[0220] In this embodiment, the display device includes multiple first input ports 251a and corresponding first path selection modules 252, such as... Figures 4 to 5 The display device shown has multiple first path selection modules 252.

[0221] The first path selection module 252 can be implemented by a controllable switch. The controllable switch type first path selection module 252 includes a first common terminal and at least one first switching terminal. The first common terminal is coupled to the corresponding first input port 251a, and the first switching terminal is coupled to the first demodulation module 253a corresponding to the first input port 251a. In response to a first indication signal, the controllable switch type first path selection module 252 establishes or disconnects the coupling between the first common terminal and the first switching terminal to connect the selected broadcast signal to the selected first demodulation module 253a. This allows the display device to 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.

[0222] For ease of description, the first path selection module 252 in the form of a controllable switch will be referred to as the first path selection switch 252' in the following text.

[0223] In some embodiments, such as Figure 6 As shown, the first path selection switch 252' corresponds to the first input port 251a.

[0224] Specifically, in some embodiments, the first input port 251a may correspond to the first path selection switch 252'.

[0225] like Figure 6 As shown, the first path selection switch 252' has a first common terminal and at least one first switching terminal. The first common terminal is coupled to the corresponding first input port 251a, and the first switching terminal is coupled to the input terminal of the first demodulation module 253a corresponding to the first input port 251a.

[0226] The first path selection switch 252' is configured to establish or disconnect the coupling between the first common terminal and the first switching terminal in response to a first indication signal, so as to connect the selected broadcast signal to the selected first demodulation module 253a.

[0227] The number of the first demodulation modules 253a mentioned above can be used to illustrate one or more examples.

[0228] In some embodiments, if the number of first demodulation modules 253a can be one, such as Figure 6 The display device shown includes three first input ports 251a, each of which corresponds to a first path selection switch 252'. Each first path selection switch 252' has a first common terminal and a first switching terminal. The first switching terminals of all the first path selection switches 252' are coupled to the same first demodulation module 253a.

[0229] In this example, any broadcast signal connected to the first input terminal can be connected to the first demodulation module 253a.

[0230] In some other embodiments, the number of first demodulation modules 253a can be three, such as... Figure 7 As shown, the display device includes three first input ports 251a, each first input port 251a is coupled to the first common terminal of the corresponding first path selection switch 252', 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.

[0231] In some embodiments, if there are multiple first demodulation modules 253a, each first path selection switch 252' can be a single-pole double-throw switch, i.e., it has two switching terminals. For example... Figure 7 As shown, the first path selection switch 252' with the first common terminal labeled 1 has two switching terminals labeled 1A and 1B, which are coupled to different first demodulation modules 253a.

[0232] Furthermore, in examples where there are multiple first demodulation modules 253a, in some embodiments, such as Figure 8 As shown, the first path selection switch 252' can be in 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 to or disconnected from one switching terminal (forming a single-pole single-throw switch), and the other common terminal can be coupled to or disconnected from another switching terminal (forming another single-pole single-throw switch).

[0233] The two common terminals of each first path selection switch 252' are coupled to the same first input port 251a, and the two switching terminals are coupled to different first demodulation modules 253a. Thus, as needed, the broadcast signal connected to the first input port 251a can be output to one or two first demodulation modules 253a through one or two switching terminals.

[0234] In other embodiments, such as Figure 9 The display device shown can have each first path selection switch 252' as a single-pole single-throw switch.

[0235] In other embodiments, such as Figure 10 The display device shown can be a single-pole triple-throw switch with three switching terminals, each of which is coupled to a different first demodulation module 253a.

[0236] 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 triple-throw, double-pole double-throw, etc., so as to connect the broadcast signal received by any first input port 251a to the first demodulation module 253a corresponding to the current scenario, thereby enabling signal selectivity.

[0237] In some embodiments of this application, the first switching terminal of the first path selection switch 252' is coupled to the first demodulation module 253a corresponding to the first input port 251a. The correspondence between the first input port 251a and the first demodulation module 253a can include various methods, which will be described exemplarily below.

[0238] In some embodiments, such as Figure 9 As shown, the first input port 251a corresponds to the first demodulation module 253a. In this scenario, each first path selection switch 252' may include a first switching terminal, which is coupled to the input terminal of the first demodulation module 253a corresponding to the first input port 251a. For example, the first switching terminal 1A is coupled to the first demodulation module 1, and the first switching terminal 2A is coupled to the first demodulation module 2.

[0239] In other embodiments, such as Figure 6 As shown, multiple first input ports 251a correspond to a first demodulation module 253a. In this scenario, each first path selection switch 252' may include a first switching terminal, and the first switching terminal of each first path selection switch 252' is coupled to the same first demodulation module 253a. For example, first switching terminals 1A, 2A, and 3A are all coupled to the first demodulation module 253a.

[0240] In some embodiments, each first input port 251a corresponds to multiple first demodulation modules 253a, and each first path selection switch 252' may include multiple first switching terminals, with each first switching terminal corresponding to a first demodulation module 253a.

[0241] Furthermore, in some embodiments, such as Figure 10 As shown, 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 corresponding to one first demodulation module 253a. For example, the first switching terminals 1A, 1B, and 1C corresponding to the first input port 251a are coupled to the first demodulation module 1, the first demodulation module 2, and the first demodulation module 3, respectively. In this way, the broadcast signal received by the first input port can be parsed based on any one of the first demodulation modules, thereby improving the flexibility of processing.

[0242] In other embodiments, such as Figure 7 As shown, each first input port 251a can correspond to a portion of the first demodulation module 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; and the first switching terminal 3A of yet 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.

[0243] It should also be noted that in the example above where each first input port 251a corresponds to multiple first demodulation modules 253a, the first demodulation modules 253a corresponding to different first input ports 251a can be the same (e.g., ...). Figure 10 This improves the utilization rate of the first demodulation module 253a. Of course, the first demodulation module 253a corresponding to different first input ports 251a can also be different. In this case, if the first input port 251a corresponds to two first demodulation modules 253a, then two first input ports 251a require four first demodulation modules 253a.

[0244] In some embodiments, the number of first demodulation modules 253a corresponding to different first input ports 251a may be exactly the same or not. For example, one first input port may correspond to one first demodulation module, and another first input port may correspond to two first demodulation modules.

[0245] In some embodiments, Figure 11a A schematic diagram of another display device provided for the application embodiment is shown in FIG11. The display device further includes a second input port 251b.

[0246] In some embodiments, satellite broadcast signals DVB-S / S2 are accessed through a first input port 251a; terrestrial broadcast signals / cable signals DVB-T / T2 / C are accessed through a second input port 251b. That is, in this example, different broadcast signals are received through different input ports.

[0247] Of course, in other examples, the access ports for terrestrial broadcast / wired signals and satellite broadcast signals can be the same, all being the first input port 251a.

[0248] In some embodiments, such as Figure 11a As shown, 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.

[0249] In this embodiment, the second input port 251b corresponds to the second demodulation module 253b, and the second demodulation module 253b does not correspond to any of the other first input ports 251a. That is to say, the second demodulation module 253b is specifically used to parse the broadcast signal received by the second input port 251b. The specifications of the second input port 251b can be the same as or different from those of the first input port 251a.

[0250] In other embodiments, such as Figure 11b The display device shown has a second input port 251b corresponding to at least one first demodulation module 253a, and is directly coupled to the first demodulation module 253a, without needing to be coupled to the first path selection switch.

[0251] Among them, at least one of the first demodulation modules 253a corresponding to the second input port 251b is a first demodulation module 253a corresponding to the first input port 251a.

[0252] For example, such as Figure 11b As shown, 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.

[0253] It is understood that this embodiment does not have a separate demodulation module for the second input port 251b, which can improve the utilization rate of the demodulation module and thus save the number of demodulation modules.

[0254] In some scenarios, users want to play and record the same broadcast signal simultaneously. Therefore, in some embodiments, such as Figure 11b , 11c The display device shown can have its second input port 251b corresponding to two demodulation modules. For example, as Figure 11b In the diagram, the second input port 251b corresponds to the first demodulation module 1 and the first demodulation module 2; for example, as shown in the diagram... Figure 11c In this configuration, the second input port 251b corresponds to the first demodulation module 2 and the second demodulation module 253b. This allows the broadcast signal received by the second input port 251b to be played and recorded simultaneously, thereby improving the user experience.

[0255] In some embodiments, satellite broadcast signals are accessed by the display device through a first input port 251a, and terrestrial broadcast / cable signals are accessed by the display device through a second input port 251b. That is, in this embodiment, the terrestrial broadcast / cable signals are demodulated by a dedicated second demodulation module 253b, such as... Figure 11a and Figure 11c As shown.

[0256] In some embodiments, one of the plurality of first input ports 251a is used as the main input port, and the rest are auxiliary input ports. The control software can prioritize the signal processing of the main input port, thereby enabling fast display. For example, refer to Figure 11b , Figure 11c Of the three input ports, one first input port 251a is the main input port, which is marked "Main DVB-S / S2" in the figure, and the other first input port 251a is the auxiliary input port, which is marked "Auxiliary DVB-S / S2" in the figure.

[0257] The following will provide an example based on a real-world application scenario.

[0258] In some embodiments, the display device includes two first input ports 251a and one second input port 251b. For example... Figure 11c As shown, the second input port 251b corresponds to a second demodulation module 253b and a first demodulation module 253a; the second input port 251b is coupled to the second demodulation module 253b and the first demodulation module 253a respectively; each first input port 251a is coupled to the first common terminal of the corresponding first path selection switch 252', each first path selection switch 252' includes two first switching terminals, each first switching terminal is coupled to a 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.

[0259] When working, refer to Figure 11c As shown, if the second input port 251b receives terrestrial broadcast / wired signal DVB-T / T2 / C, and a first input port 251a (e.g., primary DVB-S / S2) receives satellite broadcast signal DVB-S / S2 under the new standard, and the user wants to record and play simultaneously, then 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 this first input port 251a is coupled to either the first switching terminal 1A or the first switching terminal 1B, and DVB-S / S2 is connected to either the first demodulation module 1 or the first demodulation module 2. The first common terminal 2 of the first path selection switch 252' corresponding to the other first input port 251a (e.g., auxiliary DVB-S / S2) is not coupled to any first switching terminal.

[0260] If one first input port 251a (primary DVB-S / S2) receives satellite broadcast signals 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 satellite broadcast signals DVB-S / S2 under the traditional standard (referred to as old DVB-S / S2), and the user wants to record and play simultaneously, then the first common terminal 1 of the first path selection switch 252' corresponding to one first input port 251a is coupled to 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 to the first switching terminal 2B, and the old DVB-S / S2 is connected to the first demodulation module 2.

[0261] In other embodiments, such as Figure 11b As shown, the second input port 251b corresponds to two first demodulation modules 253a, and the second input port 251b is coupled to the two first demodulation modules 253a. Each first input port 251a is coupled to the first common terminal of the corresponding first path selection switch 252'. Each first path selection switch 252' includes two first switching terminals, and each first switching terminal is coupled to one first demodulation module 253a. 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.

[0262] At work, such as Figure 11b As shown, if the second input port 251b receives the terrestrial broadcast signal / wired signal DVB-T / T2 / C, and the first input port 251a (hereinafter referred to as the first input port 1) of the main DVB-S / S2 receives the new / old DVB-S / S2, and the user wants to record and play at the same time, he can first connect to DVB-S / S2. The first common terminal 1 and the first switching terminal 1A in the corresponding first path selection switch 252' are coupled together. The new / old DVB-S / S2 is first connected to the first demodulation module 1. For the first demodulation module 1, after receiving the broadcast signal, it will reject the access of other signals, and then connect to DVB-T / T2 / C. DVB-T / T2 / C is connected to the first demodulation module 2. It should be noted that the above uses the order of connecting DVB-S / S2 first and then DVB-T / T2 / C. If the order is reversed, if DVB-T / T2 / C is connected to the first demodulation module 1 first, then DVB-S / S2 is connected to the first demodulation module 2. However, the feedback signal sent 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) of the auxiliary DVB-S / S2, and cannot lock the satellite broadcast signal received by the first input port 1 (see the following example for details). Therefore, in this scenario, it is necessary to constrain the access order of DVB-T / T2 / C and DVB-S / S2.

[0263] If the first input port 1 receives a new DVB-S / S2 and the first input port 2 receives an old DVB-S / S2, and the user wants to record and play simultaneously, then the first common terminal 1 of the first path selection switch 252' corresponding to the first input port 1 is coupled to the first switching terminal 1A, 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 first input port 2 is coupled to the first switching terminal 2B, and the old DVB-S / S2 is connected to the first demodulation module 2.

[0264] Based on the above, Figure 11c In one embodiment, the second input port 251b corresponds to a separate second demodulation module 253b. Thus, in embodiments that implement one-to-one recording and one-to-play for 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. In the embodiment of 11b, the second input port 251b also corresponds to the first demodulation module 253a, thereby reducing the number of first demodulation modules 253a.

[0265] In some embodiments, Figure 12a This is a schematic diagram of the structure of another display device provided in some embodiments of this application, such as... Figure 12a As shown, the first demodulation module 253a has a feedback terminal. The first demodulation module 253a is configured to output a feedback signal through its own feedback terminal when parsing satellite broadcast signals.

[0266] It's important to note that satellite broadcast signals differ from terrestrial / cable broadcast signals. Terrestrial / cable signals are provided by television stations and are relatively stable. Satellite broadcast signals, however, are provided by satellites, and the angle between the satellite and the receiving equipment affects signal quality. Therefore, in practice, a feedback signal is needed to lock onto the corresponding satellite broadcast signal to fix the angle between the satellite and the receiving equipment, thus improving signal stability. In actual locking, the feedback signal must be coupled to the port emitting the satellite broadcast signal to achieve the lock.

[0267] In some embodiments, continue to refer to Figure 12a The display device further includes at least one second path selection module 255, which corresponds to the first demodulation module 253a and is coupled to the feedback terminal of the corresponding first demodulation module 253a.

[0268] In some embodiments, such as Figure 12a As shown, the second path selection module 255 corresponds to the first demodulation module 253a.

[0269] In some other embodiments, each second path selection module 255 corresponds to one first demodulation module 253a, but not every first demodulation module 253a corresponds to a second path selection module 255. For example... Figure 15 As shown, the first demodulation module 2 corresponds to the second path selection module 255, while the first demodulation module 1 does not correspond to the second path selection module 255, but directly corresponds to an LNB unit 256.

[0270] In some embodiments, continue to refer to Figure 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 that sends 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.

[0271] For example, such as Figure 12a As shown, if the first demodulation module 1 receives a satellite broadcast signal from the first input port 2 and sends a feedback signal, then the feedback terminal of the first demodulation module 1 is coupled to the first input port 2. If the first demodulation module 1 receives a satellite broadcast signal from the first input port 1 and sends a feedback signal, then the feedback terminal of the first demodulation module 1 is coupled to the first input port 1.

[0272] It should be noted that if the input port is specifically designed for receiving terrestrial broadcast / cable signals, then signal lockout is not required. For example... Figure 12b The display device shown.

[0273] In some embodiments, such as Figure 13 The display device shown includes a second path selection module 255 comprising: a second path selection switch 255', which corresponds to the first demodulation module 253a, and 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 253a, and the second switching terminal is coupled to the first input port 251a of the corresponding first demodulation module 253a.

[0274] In some embodiments, such as Figure 13 As shown, the second path selection switch 255' is configured to establish or disconnect the coupling between the second common terminal and the second switching terminal in response to the second indication signal, so as to lock the satellite broadcast signal received by the corresponding first demodulation module 253a based on the feedback signal.

[0275] The second indication signal may be issued by the main controller 254 based on user selection.

[0276] Figure 13 In the example, the second input port 251b is used to receive terrestrial broadcast signals / cable signals, so the signal of the second input port 251b does not need to be locked.

[0277] In this embodiment, the feedback signal emitted by the first demodulation module 253a is no longer limited to locking the satellite broadcast signal received by a fixed input port. Instead, it achieves feedback on satellite broadcast signals received by different first input ports through the switching coupling between the second common terminal and the second switching terminal of the second path selection switch 255'.

[0278] In some embodiments, the second path selection switch 255' can be a single-pole double-throw switch.

[0279] In some embodiments, each second path selection switch 255' includes 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 terminal, and the other end of each single-pole single-throw switch serves as a second switching terminal.

[0280] In other embodiments, each second path selection switch may be a single-pole multi-throw switch.

[0281] In some embodiments, such as Figure 14a As shown, the display device may include an LNB unit 256, coupled to a second path selection switch 255', configured to process the received feedback signal to generate a locking signal for locking the satellite broadcast signal. For example, the LNB unit 256 may process the voltage and frequency of the feedback signal to generate a 22kHz locking signal.

[0282] Furthermore, in some embodiments, such as Figure 14a As shown, LNB unit 256 corresponds to the first input port 251a, the second common terminal of the second path selection switch 255' is coupled to the feedback terminal of the corresponding first demodulation module 253a, the second switching terminal is coupled to the input terminal of LNB unit 256, and the output terminal of LNB unit 256 is coupled to the corresponding first input port 251a.

[0283] For example, LNB unit 256 may correspond to the first input port 251a.

[0284] For example, each of the second switching terminals of the second path selection switch 255' is coupled to an input terminal of an LNB unit 256.

[0285] In this embodiment, the second path selection switch 255' is disposed between the first demodulation module 253a and the LNB unit 256. Each LNB unit 256 corresponds to a 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 that emits the satellite broadcast signal through the second path selection switch 255'. The LNB unit 256 generates a locking signal and transmits it to the corresponding first input port 251a to lock the satellite broadcast signal of the first input port 251a.

[0286] To illustrate, see the examples below: Figure 14a As shown, the display device includes two first input ports 251a and one second input port 251b, as well as two first demodulators. First input port 1 is the main input port corresponding to LNB unit 1, and first input port 2 corresponds to LNB unit 2. Second input port 251b is connected to DVB-T / T2 / C, and first input port 1 is connected to DVB-S / S2. The user wants to achieve one-time recording and one-time playback.

[0287] like Figure 14a As shown, if DVB-T / T2 / C is connected before DVB-S / S2, the DVB-T / T2 / C signal is connected to the first demodulation module 1. When the DVB-S / S2 signal is connected, the first common terminal of the first path selection module 2 is coupled to a first switching terminal to connect DVB-S / S2 to the first demodulation module 2. The first common terminal of the first path selection module 2 is not coupled to any first switching terminal. The first demodulation module 2 outputs a feedback signal to the corresponding second path selection switch 225'. The second common terminal 2 of the second path selection switch 225' is coupled to the second switching terminal 2A and connected to the LNB unit 1 to lock the satellite broadcast signal of the first input port 1.

[0288] like Figure 14a As shown, if DVB-T / S2 is connected before DVB-S / T2, the first common terminal of the first path selection module 2 is coupled to a first switching terminal, connecting DVB-S / S2 to the first demodulation module 1, and DVB-S / T2 to the first demodulation module 2. The first common terminal of the first path selection module 2 is not coupled to any first switching terminal; the first demodulation module 1 outputs a feedback signal to the corresponding second path selection switch 255', the second common terminal 1 of which is coupled to the second switching terminal 1A, connected to the LNB unit 1, and locking the satellite broadcast signal of the first input port 1.

[0289] In this embodiment, by setting a second path selection switch, both DVB-T / S2 and DVB-S / S2 are not restricted by the access order and can lock onto the corresponding satellite broadcast signal, thereby improving the versatility of the display device.

[0290] In other embodiments, such as Figure 14b The display device shown has an LNB unit 256 corresponding to a first demodulation module 253a. The input terminal of the LNB unit 256 is coupled to the feedback terminal of the corresponding first demodulation module 253a, and the output terminal of the LNB unit 256 is coupled to the second common terminal of the second path selection switch 255' corresponding to the first demodulation module 253a. The second switching terminal is coupled to the first input port 251a.

[0291] For example, LNB unit 256 corresponds to the first demodulation module 253a.

[0292] For example, each second switching terminal is coupled to a corresponding first input port 251a.

[0293] For example, multiple second switching terminals under the same second path selection switch correspond to all of the first input ports 251a.

[0294] In this embodiment, the LNB unit 256 is disposed between the first demodulation module 253a and the first path selection switch 252. Each LNB unit 256 corresponds to one first demodulation module 253a. The locking signal output by the LNB unit 256 is connected to the first input port 251a that emits the satellite broadcast signal through the second path selection switch, so as to lock the satellite broadcast signal of the first input port 251a.

[0295] For specific examples, please refer to the examples above, which will not be repeated here.

[0296] In other embodiments, Figure 15 This is a schematic diagram of the structure of another display device provided in some embodiments of this application, such as... Figure 15 As shown, there are multiple first demodulation modules 253a. Some of the first demodulation modules 253a correspond to the second path selection switch 255, while some of the first demodulation modules 253a do not correspond to the second path selection switch 255.

[0297] Furthermore, the first demodulation module 253a corresponding to the second input port 251b does not correspond to the second path selection switch 255'.

[0298] For example, such as Figure 15As shown, the second input port 251b is coupled to the first demodulation module 1. The first demodulation module 1 does not correspond to the second path selection switch 255' and is coupled to the LNB unit 256. The first demodulation module 2 corresponds to and is coupled to the second path selection switch 255'. The second input port 251b is connected to DVB-T / T2 / C, and the first input port 1 is connected to DVB-S / S2. In the scenario where DVB-T / T2 / C is connected before DVB-S / S2, DVB-T / T2 / C is connected to the first demodulation module 1, and DVB-S / S2 is connected to the first demodulation module 2. The feedback signal output by the first demodulation module 2 is input to the LNB unit 2 and fed back to the first input port 1 through the second path selection switch 255' to lock the DVB-S / S2 connected to the first input port 1.

[0299] This embodiment can meet the requirements of each working mode with fewer second path selection switches 255' and fewer first demodulation modules 1.

[0300] In some embodiments, such as Figure 16a The display device shown also includes a plurality of first tuning units 257a.

[0301] In some embodiments, Figure 16a As shown, the first tuning unit 257a is coupled to the first path selection switch 252'. The first tuning unit 257a is configured to perform format conversion processing on the received broadcast signal to generate the converted broadcast signal.

[0302] In some embodiments, the first demodulation module 253a is configured to generate a first video signal based on the converted broadcast signal.

[0303] In this embodiment, the first tuning unit 257a is used to convert the broadcast signal into a broadcast signal in a format that the first tuning unit 257a can recognize, that is, the converted broadcast signal.

[0304] In some embodiments, the first tuning unit 257a includes a tuner.

[0305] In some embodiments, such as Figure 16a As shown, the first tuning unit 257a corresponds to the first demodulation module 253a.

[0306] For example, each first tuning unit 257a corresponds to one first demodulation module 253a. The first demodulation module 253a may correspond to multiple first tuning units 257a.

[0307] In some embodiments, such as Figure 16bThe display device shown has a first common terminal of the first path selection switch 252' coupled to the corresponding first input port 251a, and a first switching terminal coupled to the input terminal of the first tuning unit 257a; the output terminal of the first tuning unit 257a is coupled to the corresponding first demodulation module 253a.

[0308] In this embodiment, the first path selection switch 252' is located between the first input terminal and the first demodulation module 253a. For example, as shown... Figure 16a As shown, the first input port 1 is coupled to the first common terminal 1, the first switching terminal 1A is coupled to the first tuning unit 1, and the first switching terminal 1B is coupled to the first tuning unit 2; the first tuning unit 1 is coupled to the first demodulation module 1, and the first tuning unit 2 is coupled to the first demodulation module 2. The first input port 2 is coupled to the second common terminal 2, the first switching terminal 2A is coupled to the first tuning unit 1, and the first switching terminal 2B is coupled to the first tuning unit 2; the first tuning unit 1 is coupled to the first demodulation module 1, and the first tuning unit 2 is coupled to the first demodulation module 2.

[0309] In some other embodiments, as shown in FIG16C, the first tuning unit 257a corresponds to the first input port 251a in the display device.

[0310] For example, the first tuning unit 257a corresponds to the first input port 251a.

[0311] In some embodiments, such as Figure 16a As shown, the input terminal of the first tuning unit 257a is coupled to the corresponding first input port 251a, and the output terminal of the first tuning unit 257a is coupled to the input terminal of the corresponding first demodulation module.

[0312] In this embodiment, the first tuning unit 257a is disposed 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 to the input terminal 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 to the input terminal of another first tuning unit 257a (hereinafter referred to as first tuning unit 2). The output terminal of the first tuning unit 1 is coupled to the first common terminal of one first path selection switch 252' (hereinafter referred to as first path selection switch 1). One first switching terminal of the first path selection switch 1 is coupled to the first demodulation module 1, and the other first switching terminal is coupled to the first demodulation module 2. The output terminal of the first tuning unit 2 is coupled to the first common terminal of another first path selection switch 252' (hereinafter referred to as first path selection switch 2). One first switching terminal of the first path selection switch 2 is coupled to the first demodulation module 1, and the other first switching terminal is coupled to the first demodulation module 2.

[0313] In some embodiments, the first path selection switch 252' and the corresponding first demodulation module 253a corresponding to the same first input port 251a can be integrated, that is, set as a single structure.

[0314] In some embodiments, the first path selection switch 252' and the corresponding first demodulation module 253a corresponding to the same first input port 251a can be set separately.

[0315] In some embodiments, such as Figure 16a As shown, the display device further includes 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 to the corresponding second tuning unit 257b, and the second tuning unit 257b is coupled to the first demodulation module 253a corresponding to the second input port 251b.

[0316] In practical applications, DVB-T / T2 / C and DVB-S / S2 require format conversion through different tuning modules. Therefore, this embodiment provides a second tuning unit 257b specifically for DVB-T / T2 / C conversion. In some embodiments, the second input port 251b is coupled to the input terminals of different second tuning units 257b, and the output terminal of each second tuning unit 257b is coupled to a first demodulation module 253a.

[0317] For example, such as Figure 16a As shown, the second input port 251b is used to receive DVB-T / T2 / C. The second input port 251b is coupled to the second tuning unit 1 and the second tuning unit 2, respectively. The second tuning unit 1 is coupled to the second demodulation module 1, and the second tuning unit 2 is coupled to the first demodulation module 2.

[0318] In other embodiments, such as Figure 16c As shown, the second tuning unit 257b corresponds to the second input port 251b, wherein the input terminal of the second tuning unit 257b is coupled to the second input port 251b, and the output terminal of the second tuning unit 257b is coupled to the first demodulation module 1 and the first demodulation module 2 respectively.

[0319] 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.

[0320] In some other embodiments, some of the first demodulation modules 253a correspond to the second path selection switch 255', while some of the first demodulation modules 253a do not correspond to the second path selection switch.

[0321] For example, such as Figure 16d In the display device shown, the first demodulation module 1 is coupled to the LNB unit 1, and there is no corresponding second path selection switch; the first demodulation module 2 is coupled to the LNB unit 1 or the LNB unit 2 through the second path selection switch 255'. Therefore, this embodiment can save the number of second path selection switches used.

[0322] In some embodiments, such as Figure 16e The display device shown has a second input port 251b corresponding to a second demodulation module 253b, wherein the second demodulation module 253b does not correspond to any of the second input ports 251b.

[0323] For example, such as Figure 16d As shown, the second input port 251b is coupled to the input terminal of the second tuning unit 1, and the output port of the second tuning unit 1 corresponds to the second demodulation module 253b.

[0324] In some embodiments, the display device includes three input ports, one for receiving terrestrial broadcast / cable signals, one for receiving new DVB-S / S2, and one for receiving conventional DVB-S / S2.

[0325] In some embodiments, since the input interfaces of the new DVB-S / S and the traditional DVB-S / S2 are interchangeable, that is, the receiving port that receives the new DVB-S / S can also receive the traditional DVB-S / S2.

[0326] It should be noted that demodulators and tuners occupy a large amount of space, and scenarios with too many signals are actually rare. Therefore, setting three input ports can meet the user's needs, thus saving space.

[0327] In some embodiments, such as Figures 16a-16d As shown, these three input ports may include one second input port 251b and two first input ports 251a.

[0328] In other embodiments, the three input ports include three first input ports 251a, that is, each input port corresponds to a first path selection switch 252'.

[0329] In some embodiments, the display device may further include a filtering isolation circuit, with each first input port 251a or second input port 251b corresponding to one filtering isolation circuit. The filtering isolation circuit is configured to filter out noise in the broadcast signal.

[0330] In some embodiments, the display device may further include a low noise amplifier (LNA).

[0331] The input of the low-noise amplifier is coupled to the output of the corresponding filter isolation circuit.

[0332] The following is based on Figure 16a Taking this as an example, the processing flow of the broadcast signal of the display device is illustrated in various application modes that implement one-record-one-play.

[0333] The corresponding one-record-one-play application modes include:

[0334] Mode (1): Connect one DVB-S / S2 signal and one DVB-T / T2 / C signal, with the DVB-S / S2 signal connected before the DVB-T / T2 / C signal, to achieve one recording and one playback;

[0335] Mode (2): Connect one DVB-S / S2 signal and one DVB-T / T2 / C signal, with the DVB-T / T2 / C signal connected before the DVB-S / S2 signal, to achieve one recording and one playback;

[0336] Mode (3): Connect two DVB-S / S2 signals to achieve one recording and one playback;

[0337] Mode (4): Connect one DVB-S / S2 signal under the new standard to realize one recording and one playback.

[0338] Combination Figure 16a The example below illustrates this point. If a DVB-S / S2 signal is received, it is preferentially input through the main input port (first input port 1).

[0339] 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 connected first, so DVB-T / T2 / C is processed by the second tuning unit 1 first, and the processed signal is connected 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 to the first switching terminal 1B, DVB-S / S2 is processed by the first tuning unit 2, and the generated signal is connected to the first demodulation module 2, the second common terminal 2 of the second path selection switch 255' is coupled to the second switching terminal 2A, the feedback signal issued by the first demodulation module 2 locks DVB-S / S2 through the LNB unit 2, and the two first video signals output by the first demodulation module 1 and the first demodulation module 2 are connected to the main controller 254. The main controller 254 determines the signal to be played or recorded based on the user selection.

[0340] For pattern (2), continue to refer to Figure 16aThe first input port 1 receives DVB-S / S2, and the second input port 1 receives DVB-T / T2 / C. DVB-S / S2 is received first, and therefore processed by the first tuning unit 1. Consequently, the first common terminal 1 of the first path selection switch 252' is coupled to the first switching terminal 1A, and the DVB-S / S2 signal processed by the first tuning unit 1 is connected to the first demodulation module 1. The second common terminal 1 of the second path selection switch 255' is coupled to the second switching terminal 1B, and the feedback signal from the first demodulation module 1 locks DVB-S / S2 through the LNB unit 2. If the first demodulation module 1 is occupied, DVB-T / T2 / C is connected to the second tuning unit 2, and the processed DVB-T / T2 / C signal is connected to the first demodulation module 2.

[0341] For pattern (3), continue to refer to Figure 16a The first input port 1 and the first input port 2 receive the main DVB-S / S2 signal and the auxiliary DVB-S / S2 signal, respectively. The first common terminal 1 of a first path selection switch 252' is coupled to the first switching terminal 1A. The main DVB-S / S2 signal is input to the first tuning unit 1, and the processed main DVB-S / S2 signal is parsed by the first demodulation module 1. The second common terminal 1 of the second path selection module 255' is coupled to the second switching terminal 1B, and the feedback signal is locked to the main DVB-S / S2 signal by the LNB unit 2. The first common terminal 2 of another first path selection switch 252' is coupled to the first switching terminal 2B. The auxiliary DVB-S / S2 signal is input to the first tuning unit 2, and the processed auxiliary DVB-S / S2 signal is parsed by the first demodulation module 2. The second common terminal 2 of the second path selection switch 255' is coupled to the second switching terminal 2B, and the feedback signal is locked to the auxiliary DVB-S / S2 signal by the LNB unit 1.

[0342] For pattern (4), continue to refer to Figure 16aThe first input port 1 receives DVB-S / S2 signals under the new standard, which include multiple frequency band signals, with different frequency band signals corresponding 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 simultaneously coupled to both the first switching terminal 1A and the first switching terminal 1B. The DVB-S / S2 signal under the new standard is connected to the first demodulation module 1 through the first tuning unit 1 and also 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 to the main controller 254. The main controller 254 sends control signals 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 signal for the corresponding frequency band. For example, the first demodulation module 1 processes the signal of the first frequency band in the DVB-S / S2 signal, and the first demodulation module 2 processes the signal 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 to the second switching terminal 1B, or the second common terminal 2 is coupled to the second switching terminal 2A. The feedback signal locks the main DVB-S / S2 signal through the LNB unit 2.

[0343] The above is merely an example of the one-record-one-play mode. In actual applications, the display devices provided in some embodiments of this application are not limited to the above mode. For example, they can also be applied to the one-record or one-play mode, or the one-play-three-record mode.

[0344] Some embodiments of this application provide a display device including multiple signal input ports, a first path selection module, and a first demodulation module. The multiple signal input ports are coupled to corresponding first demodulation modules through the first path selection module. The first path selection module can connect the selected broadcast signal to the selected first demodulation module based on the user's selection. Thus, when changing signals, the user does not need to manually plug and unplug signal connectors; different signals can be accessed simply by selection. Therefore, this embodiment provides intelligent display device functionality, thereby improving the user experience.

[0345] In some embodiments, this application also provides a digital video converter box (STB), commonly referred to as a set-top box or set-top box. This digital video converter box can be applied to display devices such as televisions, and specifically can provide video signals to the display devices.

[0346] In some embodiments, the digital video converter box may include: a plurality of first input ports, the first input ports being configured to receive broadcast signals;

[0347] The first demodulation module has an input terminal and is configured to parse the broadcast signal received at its own input terminal to generate a first video signal;

[0348] The first path selection module, coupled to the plurality of first input ports and the first demodulation module, is configured to connect the selected broadcast signal to the selected first demodulation module.

[0349] The main controller, coupled to the first demodulation module and the first path selection module, is configured to control the display device to display based on the first video signal.

[0350] The structure of the first input port, first demodulation module, first path selection module, and main controller in this embodiment is the same as or similar to that of the first input port, first demodulation module, first path selection module, and main controller in any of the above-mentioned display device embodiments. For details, please refer to the above-mentioned display device embodiments, which will not be repeated here.

[0351] Some embodiments of the display device include a display 260, and components such as a controller 250 and a signal converter 210 integrated on a motherboard, such as... Figure 3 As shown. The controller 250 and other related components on the motherboard are coupled to the display 260. The components on the motherboard cooperate to process the broadcast signals received by the display device into audio and video signals, which are then output to the display 260 for playback.

[0352] like Figure 17 As shown, in some embodiments, the components integrated on the motherboard of the display device may include a controller 70, an input path selection module 51, a first signal demodulation module 521, and a second signal demodulation module 522.

[0353] The input path selection module 51 has multiple signal input terminals to receive different broadcast signals. For example, Figure 17 Two signal input terminals are shown: a second signal input terminal IN2 and a third signal input terminal IN3, used 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 terminal IN2 is configured to receive a first satellite broadcast signal; the third signal input terminal IN3 is configured to receive a second satellite broadcast signal.

[0354] The input path selection module 51 has at least two signal output terminals. For example, Figure 17Two signal output terminals are shown, namely the first signal output terminal OUT1 and the second signal output terminal OUT2; the first signal output terminal OUT1 is coupled to the first signal demodulation module 521, and the second signal output terminal OUT2 is coupled to the second signal demodulation module 522.

[0355] Accordingly, the input path selection module 51 can be configured to couple at least one signal input terminal to at least one signal output terminal, so as to output the broadcast signal received at any signal input terminal to the corresponding demodulation module through the coupled signal output terminal. In other words, the input path selection module 51 can select and control the input path of the broadcast signal received at any of its signal input terminals, thereby sending the received broadcast signal to one or two demodulation modules for channel demodulation.

[0356] For example, Figure 17 The input path selection module 51 shown can couple the second signal input terminal IN2 to any one or both of the two signal output terminals OUT1 and OUT2, so as to output the first satellite broadcast signal received by the second signal input terminal IN2 through the coupled signal output terminal, thereby transmitting the first satellite broadcast signal to any one or both of the first signal demodulation module 521 and the second signal demodulation module 522.

[0357] Alternatively, the input path selection module 51 can couple the third signal input terminal IN3 to any one or both of the two signal output terminals OUT1 and OUT2, so as to output the second satellite broadcast signal received by the third signal input terminal IN3 through the coupled signal output terminals, thereby transmitting the second satellite broadcast signal to any one or both of the first signal demodulation module 521 and the second signal demodulation module 522.

[0358] 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, namely the first video signal described in the preceding embodiments. For example, the video signal may be a TS stream (Transport Stream).

[0359] like Figure 17 As shown, the first signal demodulation module 521 is coupled to the first signal output terminal OUT1 and is configured to perform channel demodulation on the broadcast signal output by the first signal output terminal OUT1 to generate the corresponding TS stream.

[0360] The second signal demodulation module 522 is coupled to the second signal output terminal OUT2 and is configured to perform channel demodulation on the broadcast signal output by the second signal output terminal OUT2 to generate the corresponding TS stream.

[0361] The controller 70 is coupled to the first signal demodulation module 521 and the second signal demodulation module 522 respectively, and is configured to perform decoding and other processing on the TS stream generated by either the first signal demodulation module 521 or the second signal demodulation module 522 to obtain an audio and video signal of a specific format, and play it through the display 260; and to store the other TS stream generated by the first signal demodulation module 521 or the second signal demodulation module 522.

[0362] For example, controller 70 may store the TS stream in the memory of the display device, or in an external storage device coupled to the display device.

[0363] In some embodiments, the display device can control the operation of either of the two demodulation modules to demodulate the input broadcast signal into a TS stream and play it through the display, thus meeting the user's need to play a single television program.

[0364] In other embodiments, the display device can control two demodulation modules to work simultaneously, demodulating broadcast signals received from the same or different signal input terminals respectively. The TS stream demodulated by one demodulation module can be played through the display unit, while the TS stream demodulated by the other demodulation module can be stored (i.e. recorded) through the built-in or external storage unit of the display device, thus meeting the user's need for recording and playing television programs simultaneously.

[0365] The display device provided in the above embodiments is configured with at least two demodulation modules. The input path selection module enables the selection of the input path of the broadcast signal from any signal input terminal to any one or two demodulation modules, which can realize the parallel processing of one or more broadcast signals and meet the user's needs for playing, recording, and recording and playing TV programs.

[0366] It is understood that the number of broadcast signals processed in parallel corresponds to the number of demodulation modules. In other embodiments, three or more demodulation modules can be configured in the display device to achieve parallel processing of more broadcast signals.

[0367] To ensure the stability of the received satellite broadcast signal, it is necessary to lock the satellite broadcast signal to a specific frequency so that the display device can continuously and stably receive the satellite broadcast signal at the corresponding frequency.

[0368] In view of this, such as Figure 17 As shown, in some embodiments, the first signal demodulation module 521 is also coupled to the second signal input terminal IN2 to form a first feedback path L1; correspondingly, the first signal demodulation module 521 can also be configured to generate a first frequency-locked signal and feed the first frequency-locked signal back to the second signal input terminal IN2.

[0369] like Figure 17 As shown, in some other embodiments, the second signal demodulation module 522 is also coupled to the third signal input terminal IN3 to form a second feedback path L2; correspondingly, the second signal demodulation module 522 can also be configured to generate a second frequency-locked signal and feed the second frequency-locked signal back to the third signal input terminal IN3.

[0370] The aforementioned first and second frequency-locking signals can be fed back to a frequency conversion device outside the display device, such as a Unicanable device, via their corresponding signal input terminals. This allows the frequency conversion device to lock the frequency of the satellite broadcast signal it processes, ensuring that the locked frequency always exists in the satellite broadcast signal output by the frequency conversion device.

[0371] The inventors discovered that the two feedback paths, the first feedback path L1 and the second feedback path L2, limit the diversity of the working modes of the display device. For example, it is impossible to realize the situation in modes (2) and (4) mentioned above where the first signal demodulation module 521 generates the first frequency-locked signal and feeds it back to the third signal input terminal IN3.

[0372] In response, Figure 17 The illustrated display device provides a solution that does not require modification to the display device's hardware structure. Instead, it only requires changing the software configuration of the main controller; specifically, the controller 70 changes the destination of the frequency locking indication signal, thereby altering the generator of the frequency locking signal. This not only expands the display device's operating modes but also helps control its cost.

[0373] Specifically, in different embodiments, the controller 70 can be configured to execute at least one of the following frequency locking control processes F1 to F4.

[0374] Frequency locking control procedure F1:

[0375] When 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 locking indication signal to the first signal demodulation module 521, instructing the first signal demodulation module 521 to generate a first frequency locking signal for locking the frequency point X1 demodulated by the first signal demodulation module 521; thereby, the first signal demodulation module 521 can feed back the first frequency locking signal it generates to the second signal input terminal IN2 through the first feedback path L1, thereby locking the frequency point X1 in the first satellite broadcast signal and ensuring that the received first satellite broadcast signal always contains the frequency point X1.

[0376] In other words, when the first signal demodulation module 521 demodulates the first satellite broadcast signal received through the second signal input terminal IN2, that is, when the second signal input terminal IN2 is coupled to the first signal output terminal OUT1, the controller 70 can 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 corresponding first frequency locking signal and feed it back to the second signal input terminal IN2, thereby locking the corresponding frequency point in the first satellite broadcast signal demodulated by the first signal demodulation module 521.

[0377] Frequency locking control process F2:

[0378] When 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 frequency locking indication signal to the second signal demodulation module 522, instructing the second signal demodulation module 522 to generate a second frequency locking signal for locking the frequency point X2 demodulated by the second signal demodulation module 522; thus, the second signal demodulation module 522 can feed back the second frequency locking signal it generates to the third signal input terminal IN3 through the second feedback path L2, thereby locking the frequency point X2 in the second satellite broadcast signal and ensuring that the received second satellite broadcast signal always contains the frequency point X2.

[0379] In other words, when the second signal demodulation module 522 demodulates the second satellite broadcast signal received through the third signal input terminal IN3, that is, when the third signal input terminal IN3 is coupled to the second signal output terminal OUT2, the controller 70 can 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 corresponding second frequency locking signal and feed it back to the third signal input terminal IN3, thereby locking the corresponding frequency point in the second satellite broadcast signal demodulated by the second signal demodulation module 522.

[0380] Frequency locking control process F3:

[0381] When 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 frequency locking indication signal to the first signal demodulation module 521, instructing the first signal demodulation module 521 to generate a first frequency locking signal for locking the frequency point X2 demodulated by the second signal demodulation module 522; thus, the first signal demodulation module 521 can feed back the first frequency locking signal it generates to the second signal input terminal IN2 through the first feedback path L1, thereby locking the frequency point X2 in the first satellite broadcast signal and ensuring that the received first satellite broadcast signal always contains the frequency point X2.

[0382] Since the second signal demodulation module 522 demodulates the first satellite broadcast signal received through the second signal input terminal IN2, that is, when the second signal input terminal IN2 is coupled to 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. Therefore, the corresponding frequency locking signal needs to be fed back to the second signal input terminal IN2. However, if a second frequency locking indication signal is sent to the second signal demodulation module 522 as in F2, the second frequency locking 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.

[0383] Therefore, in the frequency locking control process F3, the controller 70 implements the control of the frequency locking signal, that is, it sends a first frequency locking indication signal to the first signal demodulation module 521 (instead of sending it to the second signal demodulation module 522 as in F2), thereby instructing the first signal demodulation module 521 (instead of the second signal demodulation module 522) to generate a first frequency locking signal for locking the frequency point X2, and feeds it back to the second signal input terminal IN2, thereby locking the frequency point X2 contained in the first satellite broadcast signal and demodulated by the second signal demodulation module 522.

[0384] Frequency locking control process F4:

[0385] When the first signal demodulation module 521 demodulates the second satellite broadcast signal received through the third signal input terminal IN3, the controller 70 sends a second frequency locking indication signal to the second signal demodulation module 522, instructing the second signal demodulation module 522 to generate a second frequency locking signal for locking the frequency point X1 demodulated by the first signal demodulation module 521; thereby, based on the feedback path between the second signal demodulation module 522 and the third signal input terminal IN3, the second frequency locking signal can be fed back to the third signal input terminal IN3 to lock the frequency point X1 in the second satellite broadcast signal, ensuring that the received second satellite broadcast signal always contains the frequency point X1.

[0386] Since 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. Therefore, the corresponding frequency locking signal needs to be fed back to the third signal input terminal IN3. However, if the first frequency locking indication signal is sent to the first signal demodulation module 521 as in F1, the generated first frequency locking signal 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.

[0387] Therefore, in the frequency locking control process F4, the controller 70 implements the control of the frequency locking signal, that is, it sends a 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), thereby instructing the second signal demodulation module 522 (instead of the first signal demodulation module 521) to generate a second frequency locking signal for locking frequency point X1, and feeds it back to the third signal input terminal IN3, thereby locking the frequency point X1 contained in the second satellite broadcast signal and demodulated by the first signal demodulation module 521.

[0388] 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 they can refer to two different frequency points, such as one being 1210MHz and the other being 1420MHz.

[0389] It should be noted that in both the frequency locking control processes F1 and F3 described above, a first frequency locking signal needs to be generated by the first signal demodulation module 521. The difference lies in the following: in case 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 case 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 ease of description and distinction, the first frequency locking signal generated in case F1 can be denoted as D11, and the first frequency locking signal generated in case F3 can be denoted as D12.

[0390] Similarly, in the frequency locking control processes F2 and F4 described above, a second frequency locking signal needs to be generated by the second signal demodulation module 522. The difference lies in the following: in case 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 case 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 ease of description and distinction, the second frequency locking signal generated in case F2 can be denoted as D21, and the second frequency locking signal generated in case F4 can be denoted as D22.

[0391] In some embodiments, during the frequency locking control process F3 described above, the second signal demodulation module 522 is in a powered-on working state (i.e., channel demodulation). At this time, the first signal demodulation module 521 may also be in a powered-on working state. In this case, the first frequency locking indication signal sent by the controller 70 can be immediately received and responded to by the first signal demodulation module 521, generating the corresponding first frequency locking signal.

[0392] In other embodiments, in the frequency locking control process F3 described above, the first signal demodulation module 521 may originally be in a sleep or off state, that is, the first signal demodulation module 521 has not received a broadcast signal and has not executed the channel demodulation process; in this case, the controller 70 can first wake up or power on the first signal demodulation module 521, and then send the first frequency locking indication signal to the first signal demodulation module 521, so that the first signal demodulation module 521 responds and generates the corresponding first frequency locking signal.

[0393] Similarly, in the frequency locking control process F4 described above, the first signal demodulation module 521 is in a powered-on state. In different embodiments, the second signal demodulation module 522 may be in a powered-on state, or it may be in a dormant or off state. When the second signal demodulation module 522 is in a powered-on state, the controller 70 can directly send the second frequency locking indication signal to the second signal demodulation module 522. When the second signal demodulation module 522 is in a dormant or off state, the controller 70 can also wake up or power on the second signal demodulation module 522 first, and then send the second frequency locking indication signal to it.

[0394] In some embodiments, the controller 70 may be based on an Inter-Integrated Circuit Bus (I-Bus). 2 The C-bus sends a frequency-locking indication signal to at least one of the two demodulation modules 521 and 522; correspondingly, the frequency-locking indication signal conforms to I 2 Serial digital signals using the C bus protocol.

[0395] Since the signal input terminal is connected to Unicandy devices other than the display device via a coaxial cable, it can only transmit analog signals and not digital signals. Therefore, the frequency locking signal should also be in analog signal form. In view of this, after receiving the frequency locking indication signal, the two demodulation modules 521 and 522 can, based on this frequency locking indication signal, determine the frequency locking signal according to a different format than I... 2 Other specific protocols of the C bus protocol generate corresponding analog signal locking signals and feed them back to the corresponding signal input terminals.

[0396] For example, the frequency-locked signal generated by the demodulation module can be a 22kHz square wave signal. Each cycle of this square wave signal corresponds to one bit. The duration of the 0 level (blank part) in each cycle corresponds to different bit values ​​(0 or 1). For example, if each cycle is 1.5ms, and the duration of the 0 level is 0.5ms, then the bit value represented by that cycle is 0; if the duration of the 0 level is 1ms, then the bit value represented by that cycle is 1. In this way, any digital signal can be converted into a frequency-locked signal in analog form and fed back to the corresponding signal input terminal.

[0397] In different embodiments, the controller 70 may execute one or both of the above frequency locking control processes F1 to F4, thereby enabling the display device to operate in different working modes.

[0398] In some embodiments, the display device can receive two DVB-S / S2 signals, that is, the second signal input terminal IN2 receives the first DVB-S / S2 signal, and the third signal input terminal IN3 receives the second DVB-S / S2 signal, i.e., the mode (3) described above.

[0399] In mode (3), the input path selection module 51 can couple the second signal input terminal IN2 to the first signal output terminal OUT1, and couple the third signal input terminal IN3 to the second signal output terminal 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, achieving one recording and one playback.

[0400] In mode (3), the first signal demodulation module 521 can generate a first frequency-locking signal D11 and feed it back to the second signal input terminal IN2 through the above frequency-locking control process F1, thereby locking the corresponding frequency point X1 in the first DVB-S / S2 signal demodulated by the first signal demodulation module 521. And through the above frequency-locking control process F2, the second signal demodulation module 522 can generate a second frequency-locking signal D21 and feed it back to the third signal input terminal IN3, thereby locking the corresponding frequency point X2 in the second DVB-S / S2 signal demodulated by the second signal demodulation module 522.

[0401] In some embodiments, the display device can receive a first DVB-S / S2 signal based on the Unicapable standard through the second signal input terminal IN2, corresponding to the mode (4) described above.

[0402] In mode (4), the input path selection module 51 can couple the second signal input terminal IN2 to the first signal output terminal OUT1 and the second signal output terminal OUT2 respectively, so that the first DVB-S / S2 signal can be output to the first signal demodulation module 521 and the second signal demodulation module 522 respectively through OUT1 and OUT2. Then, the first signal demodulation module 521 and the second signal demodulation module 522 demodulate the first DVB-S / S2 signal respectively to obtain two TS streams, realizing one recording and one playback of the same frequency point or two different frequency points in the first DVB-S / S2 signal.

[0403] In mode (4), the first signal demodulation module 521 can generate a first frequency-locking signal D11 and feed it back to the second signal input terminal IN2 through the above frequency-locking control process F1, thereby locking the corresponding frequency point X1 in the first DVB-S / S2 signal demodulated by the first signal demodulation module 521; and through the above frequency-locking control process F3, the first signal demodulation module 521 can generate a first frequency-locking signal D12 and feed it back to the second signal input terminal IN2, thereby locking the corresponding frequency point X2 in the first DVB-S / S2 signal parsed by the second signal demodulation module 522.

[0404] In other words, in mode (4), although the two frequency points X1 and X2 in the first DVB-S / S2 signal are demodulated by the two demodulation modules respectively, the frequency locking signals used to lock the two frequency points X1 and X2 are generated by the first signal demodulation module 521, namely D11 and D12. Thus, the two frequency locking signals D11 and D12 can be fed back to the second signal input terminal IN2 to realize the locking of the two frequency points X1 and X2 contained in the first DVB-S / S2 signal.

[0405] In some embodiments, the display device may also receive a second DVB-S / S2 signal based on the Unicapable standard through the third signal input terminal IN3 to achieve another mode (6).

[0406] In mode (6), the input path selection module 51 can couple the third signal input terminal IN3 to the first signal output terminal OUT1 and the second signal output terminal OUT2 respectively, so that the first DVB-S / S2 signal can be output to the first signal demodulation module 521 and the second signal demodulation module 522 respectively through OUT1 and OUT2. Then, the second DVB-S / S2 signal can be demodulated by the first signal demodulation module 521 and the second signal demodulation module 522 respectively to obtain two TS streams, thereby realizing the recording and playback of the same frequency point or two different frequency points in the second DVB-S / S2 signal.

[0407] In mode (6), the second signal demodulation module 522 can generate a second frequency-locking signal D21 and feed it back to the third signal input terminal IN3 through the frequency-locking control process F2, thereby locking the corresponding frequency point X2 in the second DVB-S / S2 signal demodulated by the second signal demodulation module 522; and through the above-mentioned frequency-locking control process F4, the second signal demodulation module 522 can generate a second frequency-locking signal D22 and feed it back to the third signal input terminal IN3, thereby locking the corresponding frequency point X1 in the second DVB-S / S2 signal demodulated by the first signal demodulation module 521.

[0408] In other words, in mode (6), although the two frequency points X1 and X2 in the first DVB-S / S2 signal are demodulated by the two demodulation modules respectively, the frequency locking signals used to lock the two frequency points X1 and X2 are generated by the second signal demodulation module 522, namely D21 and D22. Thus, the two frequency locking signals D21 and D22 can be fed back to the third signal input terminal IN3 to realize the locking of the two frequency points X1 and X2 contained in the second DVB-S / S2 signal.

[0409] As can be seen, when the input path selection module 51 selects different input paths for the satellite broadcast signal, based on the two feedback paths, the controller 70 selects to execute at least one of the above-mentioned frequency locking control processes F1 to F4, thereby indicating which demodulation module generates the frequency locking signal. For a certain demodulation module, it can not only generate a frequency locking signal for locking the frequency point it demodulates under the instruction of the controller 70, but also generate a frequency locking signal for locking the frequency point demodulated by another demodulation module. This decouples the broadcast signal demodulation process of the demodulation module from the frequency locking signal generation process, ensuring that the frequency locking signal can be accurately fed back to the corresponding signal input terminal, thereby achieving the locking of the satellite broadcast signal at the corresponding frequency point.

[0410] In some embodiments, the first signal demodulation module 521 can be directly coupled to the second signal input terminal IN2, and the second signal demodulation module 522 can be directly coupled to the third signal input terminal IN3, such as... Figure 17 As shown. In other embodiments, the two demodulation modules can also be coupled to their corresponding signal input terminals via a feedback module, such as... Figure 18 As shown below. A detailed explanation follows.

[0411] like Figure 18 As shown, in some embodiments, the display device may also include a feedback module 53.

[0412] In some embodiments, the feedback module 53 may include a first LNB unit 531.

[0413] The input terminal of the first LNB unit 531 is coupled to the first signal demodulation module 521, and the output terminal of the first LNB unit 531 is coupled to the second signal input terminal IN2.

[0414] That is, the first LNB unit 531 is coupled to the first signal demodulation module 521 and the second signal input terminal IN2 respectively, forming the first feedback path L1, which can feed back the first frequency-locked signal generated by the first signal demodulation module 521 to the second signal input terminal IN2.

[0415] In some embodiments, the first LNB unit 531 may employ an LNB power manager (i.e., LNBPowerRegister) for power management and control of external devices (such as Unicanable devices) connected to the display device. The LNB power manager not only receives the first frequency-locking signal sent by the first signal demodulation module 521, but can also connect to the controller 70 via an I2C bus. Under the control of the controller 70, it enables 13V or 18V power supply; and superimposes the first frequency-locking signal and the 13V or 18V power supply voltage, sending it to the second signal input terminal IN2 to achieve power supply and frequency-locking control of external devices coupled to the second signal input terminal IN2.

[0416] In other words, a first LNB unit is set in the feedback path between the first signal demodulation module and the second signal input terminal to realize the feedback of the corresponding frequency locking signal; the first LNB unit can also, under the control of the controller, superimpose the power supply voltage and the frequency locking signal generated by the first signal demodulation module and feed them back to the second signal input terminal to provide power supply and frequency locking control for the external devices of the display device coupled to the second signal input terminal.

[0417] In some embodiments, the feedback module 53 may include a second LNB unit 532.

[0418] The input terminal of the second LNB unit 532 is coupled to the second signal demodulation module 522, and the output terminal of the second LNB unit 532 is coupled to the third signal input terminal IN3.

[0419] That is, the second LNB unit 532 is coupled to the second signal demodulation module 522 and the third signal input terminal IN3 respectively, forming the second feedback path L2, which can feed back the second frequency-locked signal generated by the second signal demodulation module 522 to the third signal input terminal IN3.

[0420] In some embodiments, the second LNB unit 532 may also employ the LNB power manager described above, with related functions similar to those of the first LNB unit 531, which will not be repeated here.

[0421] In other words, a second LNB unit is set in the feedback path between the second signal demodulation module and the third signal input terminal to realize the feedback of the corresponding frequency locking signal; the second LNB unit can also, under the control of the controller, superimpose the power supply voltage and the frequency locking signal generated by the second signal demodulation module and feed them back to the third signal input terminal to provide power supply and frequency locking control for the external devices of the display device coupled to the third signal input terminal.

[0422] In some embodiments, the feedback module 53 may have only one LNB unit, such as only the first LNB unit 531 or only the second LNB unit 532; in other embodiments, the feedback module 53 may have two LNB units, namely the first LNB unit 531 and the second LNB unit 532, where only one LNB unit is in the working state and the other is in the idle state, or both LNB units are in the working state or both are in the idle state.

[0423] In some embodiments, such as Figure 18 As shown, the input path selection module 51 can also be configured with a first signal input terminal IN1. The first signal input terminal IN1 is configured to receive terrestrial broadcast signals (i.e., broadcast signals transmitted based on the DVB-T or DVB- / T2 standards) or wired signals (i.e., broadcast signals transmitted based on the DVB-C standard). In some of the following embodiments, the broadcast signals that the first signal input terminal IN1 can receive are collectively referred to as DVB-T / T2 / C signals.

[0424] It should be noted that the processing method of the display device when receiving terrestrial broadcast signals at the first signal input terminal IN1 is the same as the processing method when receiving wired signals at the first signal input terminal IN1, and substitutions can be made in the relevant embodiments.

[0425] The first signal input terminal IN1 is coupled to the first signal output terminal OUT1 and the second signal output terminal OUT2 respectively. The terrestrial broadcast signal received by the first signal input terminal IN1 can be output through at least one of the first signal output terminal OUT1 and the second signal output terminal OUT2.

[0426] In some embodiments, based on the first signal input terminal IN1, the display device can implement mode (5): accessing a terrestrial broadcast signal to achieve one recording and one broadcast. Mode (5) will be described in detail later.

[0427] In some embodiments, such as Figure 18 As shown, the input path selection module 51 includes a third controllable switch S3.

[0428] The common terminal a1 of the third controllable switch S3 is coupled to the second signal input terminal IN2. One of the third switch switching terminals b1 of the third controllable switch S3 is coupled to the first signal output terminal OUT1, and the other third switch switching terminal b2 is coupled to the second signal output terminal OUT2.

[0429] The third controllable switch S3 can be a programmable electronic switching device, such as a transistor.

[0430] Accordingly, 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 disconnect the coupling between the third switch common terminal a1 and at least one third switch switching terminal b1, b2, thereby realizing the coupling between the second signal input terminal IN2 and at least one of the first signal output terminal OUT1 and the second signal output terminal OUT2.

[0431] Therefore, by controlling the third controllable switch S3 through the controller 70, the input path selection module 51 can select the input path of the first DVB-S / S2 signal received by the second signal input terminal IN2, that is, the first DVB-S / S2 signal can be output through at least one of the two signal output terminals OUT1 and OUT2.

[0432] In some embodiments, the third controllable switch S3 may be in the form of two single-pole single-throw switches. 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 terminal a1 of the third controllable switch S3 is coupled to any one or both of the two third switch switching terminals b1 and b2.

[0433] For example, in response to the first indication signal k1, the third common terminal a1 of the third controllable switch S3 is coupled to the third switching terminal b1, so that the first DVB-S / S2 signal received by the second signal input terminal IN2 is output through the first signal output terminal OUT1 corresponding to the third switching terminal b1; or, in response to the first indication signal k1, the third common terminal a1 of the third controllable switch S3 is coupled to the third switching terminal b2, so that the first DVB-S / S2 signal received by the second signal input terminal IN2 is also output through the second signal output terminal OUT2 corresponding to the third switching terminal b2.

[0434] In some embodiments, the input path selection module 51 includes a fourth controllable switch S4.

[0435] The fourth common terminal a2 of the fourth controllable switch S4 is coupled to the second signal input terminal IN2. One fourth switching terminal b3 of the fourth controllable switch S4 is coupled to the first signal output terminal OUT1, and the other fourth switching terminal b4 is coupled to the second signal output terminal OUT2.

[0436] The fourth controllable switch S4 can also be a programmable electronic switch device, controlled by a first indication signal sent by the controller 70. Specifically, the fourth controllable switch S4 is configured to establish or disconnect the coupling between the fourth switch common terminal a2 and at least one fourth switch switching terminal b3, b4 in response to the first indication signal k1, thereby achieving coupling between the third signal input terminal IN3 and at least one of the first signal output terminal OUT1 and the second signal output terminal OUT2.

[0437] Therefore, by controlling the fourth controllable switch S4 through the controller 70, the input path selection module 51 can select the input path of the second DVB-S / S2 signal received by the third signal input terminal IN3, that is, the second DVB-S / S2 signal can be output through at least one of the two signal output terminals OUT1 and OUT2.

[0438] In some embodiments, the fourth controllable switch S4 may also be in the form of two single-pole single-throw switches, such that the common terminal a2 of the fourth switch is coupled to any one or both of the switching terminals b3 and b4 of the second fourth switch. The controller 70 controls the fourth controllable switch S4 through the first indication signal k1 in the same principle as controlling the third controllable switch S3 described above, and will not be repeated here.

[0439] It should be noted that in some embodiments, one or more controllable switches can be set in the input path selection module 51 according to the input path selection control requirements of one or more signal input terminals. For example, in a display device that only needs to select the input path of the broadcast signal received at the second signal input terminal IN2, its input path selection module 51 may only have a third controllable switch S3; in a display device that only needs to select the input path of the broadcast signal received at the third signal input terminal IN3, its input path selection module 51 may only have a fourth controllable switch S4; in a display device that needs to select the input path of the broadcast signals received at the second signal input terminal IN2 and the third signal input terminal IN3 respectively, its input path selection module 51 may have both a third controllable switch S3 and a fourth controllable switch S4.

[0440] In some embodiments, the input path selection module 51 in the display device may further include multiple tuning units; each tuning unit is configured to tune the broadcast signal input to each signal input terminal, converting the broadcast signal from a high-frequency signal to an intermediate-frequency signal.

[0441] For example, refer to Figure 18 The input path selection module 51 may 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.

[0442] The first T-signal tuning unit 511 is coupled to the first signal input terminal IN1 and the first signal output terminal OUT1 respectively, and is configured to tune the DVB-T / T2 / C signal received by the first signal input terminal IN1, and output the tuned intermediate frequency signal to the first signal demodulation module 521 through the first signal output terminal OUT1.

[0443] The second T-signal tuning unit 512 is coupled to the first signal input terminal IN1 and the second signal output terminal OUT2, respectively, and is configured to tune the DVB-T / T2 / C signal received by the first signal input terminal IN1, and output the tuned intermediate frequency signal to the second signal demodulation module 522 through the second signal output terminal OUT2.

[0444] The first S-signal tuning unit 513 is coupled to a switching terminal b1 of the third controllable switch S3 and a switching terminal b3 of the fourth controllable switch S4, and is also coupled to the first signal output terminal OUT1. It is configured to tune the DVB-S / S2 signal received by the second signal input terminal IN2 or the third signal input terminal IN3, and output the tuned intermediate frequency signal to the first signal demodulation module 521 through the first signal output terminal OUT1.

[0445] The second S-signal tuning unit 514 is coupled to another switching terminal b2 of the third controllable switch S3 and a switching terminal b4 of the fourth controllable switch S4, and is also coupled to the second signal output terminal OUT2; it is configured to tune the DVB-S / S2 signal received by the second signal input terminal IN2 or the third signal input terminal IN3, and output the tuned intermediate frequency signal to the second signal demodulation module 522 through the second signal output terminal OUT2.

[0446] Based on the above four tuning units, the display device can simultaneously process two DVB-T / T2 / C signals, or simultaneously process two DVB-S / S2 signals, or simultaneously process one DVB-T / T2 / C signal and one DVB-S / S2 signal, achieving one recording and one playback.

[0447] For example, for the DVB-T / T2 / C signal received at the first signal input terminal IN1, the intermediate frequency signals corresponding to two different TV programs can be obtained by tuning through the first T signal tuning unit 511 and the second T signal tuning unit 512, respectively. Then, the intermediate frequency signals corresponding to the two different TV programs can be demodulated by the first signal demodulation module 521 and the second signal demodulation module 522, respectively, to obtain the TS streams corresponding to the two different TV programs. The TS stream corresponding to one of the TV programs can be used for playback, and the other can be used for recording.

[0448] Therefore, the input path selection module 51 can not only select the input path of the broadcast signal received at each signal input terminal, but also tune the broadcast signal on each input path through the tuning unit, select the signal of the required frequency, amplify it, and convert it into an intermediate frequency signal to reduce interference and improve signal quality.

[0449] For example, the controller 70 can send configuration information to the corresponding tuning unit according to the user's channel selection operation, so as to control the corresponding tuning unit to tune a signal that matches the frequency of the channel selected by the user.

[0450] In other words, the frequency of the signal demodulated by each demodulation module is determined by the tuning selection of its upstream tuning unit. For satellite broadcast signals, locking the frequency demodulated by a particular demodulation module means locking the frequency selected by the tuning unit upstream of that demodulation module. The frequency selected by the tuning unit is controlled by the controller 70 and is the frequency of the channel selected by the user. Therefore, during the frequency locking control process, the controller 70 can determine the frequency to be locked based on its configuration information for the tuning unit, thereby generating a corresponding frequency locking indication signal to instruct the relevant demodulation unit to generate the corresponding frequency locking signal, thus achieving the locking of the corresponding frequency.

[0451] In some embodiments, the four tuning units can be combined in pairs to form two tuning chips.

[0452] For example, the first T-signal tuning unit 511 and the second T-signal tuning unit 512 are integrated into one tuning chip, and the first S-signal tuning unit 513 and the second S-signal tuning unit 514 are integrated into another tuning chip. In this way, the two tuning units in one tuning chip tune the same type of broadcast signal, which can avoid signal interference.

[0453] For example, the first T-signal tuning unit 511 and the first S-signal tuning unit 513 are integrated into one tuning chip, while the second T-signal tuning unit 512 and the second S-signal tuning unit 514 are integrated into another tuning chip. In this way, a single tuning chip can have the tuning capability for at least two different types of broadcast signals, making it suitable for more application scenarios.

[0454] In some embodiments, the four tuning units described above can also be integrated into a single tuning chip. This can improve the integration of the motherboard in the display device, reduce the circuit board space occupied by the tuning chip, and reduce the number of wires.

[0455] 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. Other settings can also be adopted according to the configuration requirements of the display device. For example, the input path selection module 51 may only have one T signal tuning unit, one S signal tuning unit, or only two S signal tuning units, etc.

[0456] It should be noted that, Figure 17 and Figure 18 The components shown are the same as those in the previous appendix. Figures 1-1 The following correspondence exists between 6 and related embodiments:

[0457] The input path selection module 51 corresponds to some of the embodiments and figures mentioned above (such as...). Figure 4 The first path selection module 252 in (etc.) has each signal input terminal IN2 and IN3 corresponding to the input terminal of each first path selection module 252;

[0458] The first signal demodulation module 521 and the second signal demodulation module 522 correspond to some of the embodiments and figures described above (e.g., ...). Figure 4 The two first demodulation modules 253a in (etc.);

[0459] Controller 70 corresponds to some of the embodiments and figures mentioned above (e.g.) Figure 5 , 6 The main controller 254 in (etc.);

[0460] 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... Figure 16a , Figure 16b and Figure 16d The second tuning unit 1 and the second tuning unit 2 shown by reference numeral 257b, and the first tuning unit 1 and the first tuning unit 2 shown by reference numeral 257a;

[0461] The first LNB unit 531 and the second LNB unit 532 can respectively correspond to the above-described... Figures 13-14 LNB cell 1 and LNB cell 2, labeled 256 in section 6;

[0462] The third controllable switch S3 and the fourth controllable switch S4 correspond to Figure 11b The two first path selection switches 252' shown are illustrated.

[0463] Based on the above correspondence, the contents of the relevant embodiments can be referred to each other.

[0464] In some embodiments, the motherboard can be implemented using a printed circuit board, and components such as the input path selection module 51, the first signal demodulation module 521, the second signal demodulation module 522, and the controller 70 can be integrated onto the motherboard through processes such as printing and soldering.

[0465] In some embodiments, the first signal demodulation module 521 and the controller 70 can be integrated into the same chip, such as a system on chip (SOC).

[0466] In some embodiments, Figure 3 The controller 250 shown may be the controller 70; in other embodiments, Figure 3 The controller 250 shown can be the aforementioned SOC chip.

[0467] In some embodiments, the controller 70 is provided with at least two TS stream input interfaces, which are coupled to the first signal demodulation module 521 and the second signal demodulation module 522 respectively, for receiving the TS streams demodulated by each demodulation module.

[0468] In some embodiments, the controller 70 is further provided with one or more configuration information output interfaces. For example, the configuration information output interface may be based on I... 2 This is an interface for communication using the C-bus protocol. The controller 70 can use this configuration information output interface to couple with components such as the first signal demodulation module 521, the second signal demodulation module 522, and the input path selection module 51, respectively, to send configuration information to these components. For example, the configuration information may include the frequency locking indicator signal and the first indicator signal k1 mentioned above.

[0469] In some embodiments, Figure 18 The display device shown can also implement modes (1) to (4) and (6) as described above, in addition to mode (5). The following describes the broadcast signal input, processing and frequency locking control process in modes (1) to (6).

[0470] For mode (5), the broadcast signal input and processing procedure of the display device is as follows:

[0471] like Figure 18 As shown, after the display device detects that the first signal input terminal IN1 receives the DVB-T / T2 / C signal, it tunes the DVB-T / T2 / C signal through the first T signal tuning unit 511 and the second T signal tuning unit 512 respectively.

[0472] The intermediate frequency signal generated by the first T signal tuning unit 511 is output through the first signal output terminal OUT1, and then demodulated by the first signal demodulation module 521 to generate a TS stream.

[0473] The intermediate frequency signal generated by the second T signal tuning unit 512 is output through the second signal output terminal OUT2, and then demodulated by the second signal demodulation module 522 to generate another TS stream;

[0474] The controller 70 can receive the two TS streams mentioned above and play and record them respectively, realizing one recording and one playback.

[0475] For mode (5), there is no DVB-S / S2 signal input in the display device, and frequency locking control is not required.

[0476] For pattern (1), refer to Figure 19 The broadcast signal input and processing process of the display device is as follows:

[0477] The display device first detects that the second signal input terminal IN2 receives the first DVB-S / S2 signal, and sends the first indication signal k1 to the third controllable switch S3 through the controller 70. This controls the third switch common terminal a1 of the third controllable switch S3 to couple with the third switch switching terminal b1, so that the first DVB-S / S2 signal can be tuned by the first S signal tuning unit 513. The generated intermediate frequency signal is output through the first signal output terminal OUT1, and then demodulated by the first signal demodulation module 521 to generate a TS stream.

[0478] Then, the display device detects that the first signal input terminal IN1 receives a DVB-T / T2 / C signal. Based on the configuration of the controller 70, the second T signal tuning unit 512 is enabled, so that the DVB-T / T2 / C signal is tuned through the second T signal tuning unit 512. The generated intermediate frequency signal is output through the second signal output terminal OUT2, and then demodulated by the second signal demodulation module 522 to generate another TS stream.

[0479] The controller 70 can receive the two TS streams mentioned above and play and record them respectively, realizing one recording and one playback of one DVB-T / T2 / C signal and one DVB-S / S2 signal.

[0480] The frequency locking control process corresponding to mode (1) is as follows:

[0481] Since the broadcast signal demodulated by the first signal demodulation module 521 is the first DVB-S / S2 signal input from the second signal input terminal IN2, it needs to be frequency locked. Therefore, 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.

[0482] 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 in the first DVB-S / S2 signal (i.e. the frequency point demodulated by the first signal demodulation module 521, i.e. the frequency point selected by the first S signal tuning unit 513) 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 selected by the first S signal tuning unit 513 and demodulated by the first signal demodulation module 521, thereby realizing the frequency-locking control of the DVB-S / S2 signal in mode (1).

[0483] For pattern (2), refer to Figure 20 The broadcast signal input and processing process of the display device is as follows:

[0484] After the display device detects that the DVB-T / T2 / C signal is received at the first signal input terminal IN1, it configures the first T signal tuning unit 511 through the controller 70 to tune the DVB-T / T2 / C signal. The generated intermediate frequency signal is output through the first signal output terminal OUT1 and then demodulated by the first signal demodulation module 521 to generate a TS stream.

[0485] Then, the display device detects that the second signal input terminal IN2 has received the first DVB-S / S2 signal. The controller 70 sends the first indication signal k1 to the third controllable switch S3, so that the third switch common terminal a1 of the third controllable switch S3 is coupled to the third switch switching terminal b2. The first DVB-S / S2 signal is tuned by the second S signal tuning unit 514, and the generated intermediate frequency signal is output through the second signal output terminal OUT2. Then it is demodulated by the second signal demodulation module 522 to generate another TS stream.

[0486] The controller 70 can receive the two TS streams mentioned above and play and record them respectively, realizing one recording and one playback of one DVB-T / T2 / C signal and one DVB-S / S2 signal.

[0487] The frequency locking control process corresponding to mode (2) is as follows:

[0488] Since the broadcast signal demodulated by the second signal demodulation module 522 is the first DVB-S / S2 signal input from the second signal input terminal IN2, it needs to be frequency locked. Therefore, 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.

[0489] In this way, the controller 70 controls the feedback of the first frequency-locking signal D12 to the second signal input terminal IN2 through the first feedback path L1. 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. Accordingly, the frequency conversion device can lock the corresponding frequency point in the first DVB-S / S2 signal (i.e., the frequency point demodulated by the second signal demodulation module 522, i.e., the frequency point selected by the second S signal tuning unit 514) based on the first frequency-locking signal D12, 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 selected by the second S signal tuning unit 514 and demodulated by the second signal demodulation module 522, thereby realizing the frequency-locking control of the DVB-S / S2 signal in mode (2).

[0490] For pattern (3), refer to Figure 21 The broadcast signal input and processing process of the display device is as follows:

[0491] For the first DVB-S / S2 signal input from the second signal input terminal IN2, the display device sends a first indication signal k1 to the third controllable switch S3 through the controller 70, so that the third switch common terminal a1 of the third controllable switch S3 is coupled to the third switch switching terminal b1, so that the first DVB-S / S2 signal is tuned through the first S signal tuning unit 513, and the generated intermediate frequency signal is output through the first signal output terminal OUT1, and then demodulated by the first signal demodulation module 521 to generate a TS stream;

[0492] For the second DVB-S / S2 signal input from the third signal input terminal IN3, the display device outputs a first indication signal k1 to the fourth controllable switch S4 through the controller 70, so that the fourth switch common terminal a2 of the fourth controllable switch S4 is coupled to the fourth switch switching terminal b4, so that the second DVB-S / S2 signal is tuned through the second S signal tuning unit 514, and the generated intermediate frequency signal is output through the second output terminal OUT2, and then demodulated by the second signal demodulation module 522 to generate another TS stream;

[0493] The controller 70 can receive the two TS streams mentioned above and play and record them respectively, realizing one recording and one playback of the two DVB-S / S2 signals.

[0494] The frequency locking control process corresponding to mode (3) is as follows:

[0495] Since the broadcast signal demodulated by the first signal demodulation module 521 is the first DVB-S / S2 signal input from the second signal input terminal IN2, frequency locking is required. Therefore, the controller 70 can execute the frequency locking control process F1. Since the broadcast signal demodulated by the second signal demodulation module 522 is the second DVB-S / S2 signal input from the third signal input terminal IN3, frequency locking is required. Therefore, the controller 70 can execute the frequency locking control process F2.

[0496] In other words, the controller 70 can generate a first frequency locking indication signal and a second frequency locking indication signal based on the two frequency points to be locked by the two demodulation modules, and send them to the first signal demodulation module 521 and the second signal demodulation module 522 respectively, instructing the first signal demodulation module 521 and the second signal demodulation module 522 to generate frequency locking signals for locking the frequency points they demodulate, and feed them back to the corresponding signal input terminals: the first signal demodulation module 521 generates a first frequency locking signal D11 for locking the frequency points it demodulates and feeds it back to the second signal input terminal IN2, and the second signal demodulation module 522 generates a second frequency locking signal D21 for locking the frequency points it demodulates and feeds it back to the third signal input terminal IN3, thereby realizing the locking control of the corresponding frequency points of the two DVB-S / S2 signals received by the two signal input terminals in mode (3).

[0497] For pattern (4), refer to Figure 22 The broadcast signal input and processing process of the display device is as follows:

[0498] The display device detects that the second signal input terminal IN2 receives the first DVB-S / S2 signal under the Unitable standard, and sends the first indication signal k1 to the third controllable switch S3 through the controller 70, so that the third switch common terminal a1 of the third controllable switch S3 is coupled to the two third switch switching terminals b1 and b2 respectively, and the first DVB-S / S2 signal is input to the first S signal tuning unit 513 and the second S signal tuning unit 514 respectively for tuning;

[0499] The intermediate frequency signal generated by the first S-signal tuning unit 513 is output through the first signal output terminal OUT1, and then demodulated by the first signal demodulation module 521 to generate a TS stream.

[0500] The intermediate frequency signal generated by the second S-signal tuning unit 514 is output through the second signal output terminal OUT2, and then demodulated by the second signal demodulation module 522 to generate another TS stream;

[0501] The controller 70 can receive the two TS streams mentioned above and play and record them respectively, realizing one-to-one recording and one-to-play of a DVB-S / S2 signal under the Unicapable standard.

[0502] The frequency locking control process corresponding to mode (4) is as follows:

[0503] Since the broadcast signal demodulated by the first signal demodulation module 521 is the first DVB-S / S2 signal input from the second signal input terminal IN2, it needs to be frequency locked, 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 also the first DVB-S / S2 signal input from the second signal input terminal IN2, it needs to be frequency locked, so the controller 70 can execute the frequency locking control process F3.

[0504] In other words, 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 them to the first signal demodulation module 521. The controller 70 instructs the first signal demodulation module 521 to generate two first frequency locking signals respectively, namely, the first frequency locking signal D11 used to lock the frequency point demodulated by itself, and the first frequency locking signal D12 used to lock 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 both fed back to the second signal input terminal IN2 through the first feedback path L1 corresponding to the first signal demodulation module 521, thereby realizing the frequency locking control of the two frequency points of the DVB-S / S2 signal under the Unican standard in mode (4).

[0505] It should be noted that in some embodiments, in the above mode (4), the controller 70 can also generate a 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. These two kinds of indication information can instruct the first signal demodulation module 521 to generate the first frequency locking signals D11 and D12 respectively.

[0506] Similar to mode (4) above, for mode (6), the second DVB-S / S2 signal under the Unicapable standard is input to 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 through the first S signal tuning unit 513 and the second S signal tuning unit 514 respectively. The generated intermediate frequency signal is demodulated through the first signal demodulation module 521 and the second signal demodulation module 522 respectively, generating two TS streams. The controller 70 can realize the frequency locking control of the two frequency points of the DVB-S / S2 signal input through the third signal input terminal IN3 that are demodulated by the two demodulation modules based on the frequency locking control process F4 and F2 described above.

[0507] As can be seen, the display device can realize any of the above modes (1) to (6), ensuring that the input path selection, tuning, demodulation and other processing of the broadcast signal input from any signal input terminal is obtained to obtain one or two TS streams, realizing one recording and one broadcast.

[0508] 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. Therefore, the frequency locking signal used to lock the corresponding frequency point cannot be fed back through the second feedback path L2 corresponding to the second signal demodulation module 522. In this regard, in modes (2) and (4), the controller 70 can execute the frequency locking control process F3 to send a first frequency locking indication signal to the first signal demodulation module 521, instructing the first signal demodulation module 521 to generate the corresponding first frequency locking signal D12, which is fed back to the second signal input terminal IN2 through the first feedback path L1. This enables accurate locking of the corresponding frequency point in the first DVB-S / S2 signal demodulated by the second signal demodulation module 522.

[0509] In addition, in mode (6), the second DVB-S / S2 signal demodulated by the first signal demodulation module 521 is input by the third signal input terminal IN3. Therefore, the frequency locking signal used to lock the corresponding frequency point cannot be fed back through the first feedback path L1 corresponding to the first signal demodulation module 521. In this regard, the controller 70 can execute the frequency locking control process F4 to send the second frequency locking indication signal to the second signal demodulation module 522, instructing the second signal demodulation module 522 to generate the corresponding second frequency locking signal D22, which is fed back to the third signal input terminal IN3 through the second feedback path L2. This can achieve accurate locking of the corresponding frequency point in the second DVB-S / S2 signal demodulated by the first signal demodulation module 521.

[0510] In some embodiments, a receiving terminal may also be integrated on the motherboard of the display device. The receiving terminal has at least one cable interface and at least one wiring pin corresponding to the at least one cable interface.

[0511] For example, Figure 23 The receiving terminal 60 is shown. The receiving terminal 60 can be coupled to a coaxial cable for transmitting broadcast signals via a cable interface.

[0512] Reference Figure 23 The receiving terminal 60 has three cable interfaces: a bayonet interface 61 and two threaded interfaces 62 and 63.

[0513] The bayonet-type interface 61 can be used as a receiving port for signals such as DVB-T / T2 / C, and can be coupled to one end of a coaxial cable under traditional or new standards, while the other end of the coaxial cable can be coupled to a ground antenna, etc.

[0514] The threaded interfaces 62 and 63 can be used as the main receiving port and auxiliary receiving port for DVB-S / S2 signals, respectively. They can be coupled to one end of a coaxial cable under the traditional or new standard, and the other end of the coaxial cable can be coupled to a satellite antenna.

[0515] The receiving terminal 60 is coupled to the corresponding signal input terminal in the input path selection module 51 via a wiring pin.

[0516] For example, Figure 23 The three wiring pins of the receiving terminal 60 are shown: the T pin coupled to the bayonet interface 61, the main S pin coupled to the threaded interface 62, and the auxiliary S pin coupled to the threaded interface 63.

[0517] The receiving terminal 60 is configured to receive broadcast signals transmitted via coaxial cable through the cable interface, and transmit the broadcast signals to the corresponding signal input terminal through the corresponding wiring pins.

[0518] The receiving terminal 60 is coupled to the first signal input port IN1 of the input path selection module 51 via the T pin. It can receive DVB-T / T2 / C signals transmitted via the coupled coaxial cable through the bayonet interface 61, and transmit the DVB-T / T2 / C signals to the first signal input port IN1 via the T pin, so that the DVB-T / T2 / C signals are input to the input path selection module 51 from the first signal input port IN1.

[0519] The receiving terminal 60 is coupled to the second signal input port IN2 of the input path selection module 51 via the main S pin. It can receive the DVB-S / S2 signal transmitted by the coupled coaxial cable 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 to the input path selection module 51 through the second signal input port IN2.

[0520] The receiving terminal 60 is coupled to the third signal input port IN3 of the input path selection module 51 via the auxiliary S pin. It can receive the DVB-S / S2 signal transmitted by the coupled coaxial cable 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 to the input path selection module 51 through the third signal input port IN3.

[0521] Users connect different coaxial cables to different cable interfaces, and the display device will operate in different modes to meet the user's different needs.

[0522] For example, if the user first connects the coaxial cable transmitting DVB-S / S2 signals to the threaded interface 62, and then connects the coaxial cable transmitting DVB-T / T2 / C signals to the bayonet interface 61, the display device will operate in mode (1).

[0523] If the user first connects the coaxial cable transmitting DVB-T / T2 / C signals to the bayonet interface 61, and then connects the coaxial cable transmitting DVB-S / S2 signals to the threaded interface 62, the display device will operate in mode (2).

[0524] If the user connects two coaxial cables that transmit DVB-S / S2 signals to threaded interfaces 62 and 63 respectively, the display device will operate in mode (3).

[0525] If the user connects a coaxial cable for transmitting DVB-S / S2 signals based on the Unicapable standard to the threaded interface 62, the display device will operate in mode (4).

[0526] If the user connects the coaxial cable transmitting DVB-T / T2 / C signals to the bayonet interface 61, the display device will operate in mode (5).

[0527] It should be noted that the receiving terminal 60 corresponds to some of the embodiments and figures mentioned above (such as...). Figure 5 , 6 The terminals in (etc.) include the bayonet interface 61, which corresponds to the second input port 251b in some of the preceding embodiments, and the two threaded interfaces 62 and 63, which correspond to the first input port 251a in some of the preceding embodiments.

[0528] In some embodiments, to improve the quality of the received broadcast signal, the motherboard may also integrate a DC blocking filter circuit and a low-noise amplifier (i.e., LNA).

[0529] The DC blocking filter circuit is configured to filter the broadcast signal and isolate DC interference signals.

[0530] The low-noise amplifier is configured to amplify the broadcast signal.

[0531] For example, such as Figure 23 As shown, each pin of the terminal block 60 is provided with a DC blocking circuit and a low-noise amplifier between its corresponding signal input terminal and the terminal pin.

[0532] For example, the input terminal of the first filter DC blocking circuit 541 is coupled to the T pin of the terminal block 60, the output terminal of the first filter DC blocking circuit 541 is coupled to the input terminal of the first low noise amplifier 551, and the output terminal of the first low noise amplifier 551 is coupled to the first signal input terminal IN1.

[0533] In this way, the DVB-T / T2 / C signal output from the T pin can first pass through the first DC filtering and blocking circuit 541 to filter out DC interference signals, and then pass through the first low-noise amplifier 551 for amplification. As a result, the broadcast signal received by the first signal input terminal IN1 is the filtered and amplified DVB-T / T2 / C signal, and the signal quality is improved.

[0534] For example, the input terminal of the second filter DC blocking circuit 542 is coupled to the main S pin of the terminal block 60, the output terminal of the second filter DC blocking circuit 542 is coupled to the input terminal of the second low noise amplifier 552, and the output terminal of the second low noise amplifier 552 is coupled to the second signal input terminal IN2.

[0535] In this way, the DVB-S / S2 signal output from the main S pin can first pass through the second DC filtering circuit 542 to filter out DC interference signals, and then be amplified by the second low-noise amplifier 552. Thus, the broadcast signal received by the second signal input terminal IN2 is the filtered and amplified DVB-S / S2 signal, and the signal quality is improved.

[0536] For example, the input terminal of the third filter DC blocking circuit 543 is coupled to the auxiliary S pin of the terminal block 60, the output terminal of the third filter DC blocking circuit 543 is coupled to the input terminal of the third low noise amplifier 553, and the output terminal of the third low noise amplifier 553 is coupled to the third signal input terminal IN3.

[0537] In this way, the DVB-S / S2 signal output from the auxiliary S pin can first pass through the third filter DC blocking circuit 543 to filter out DC interference signals, and then be amplified by the third low noise amplifier 553. Thus, the broadcast signal received by the third signal input terminal IN3 is the filtered and amplified DVB-S / S2 signal, and the signal quality is improved.

[0538] In some embodiments, the first low-noise amplifier 551 may 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 may 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.

[0539] That is, by setting two tuner chips (one T-signal tuning chip and one S-signal tuning chip) in the display device, the modes (1) to (6) mentioned above can be realized. Integrating the relevant components can simplify the circuit board wiring of the display device, improve the fabrication yield and efficiency of the circuit board, thereby improving the fabrication yield and efficiency of the display device.

[0540] Reference Figure 24 In some embodiments, a display device is also provided, which includes 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 be referred to... Figure 17 The display devices shown are similar, so we will not repeat the details. The following focuses on... Figure 24 The display device shown is Figure 17 The differences between them will be explained.

[0541] Different from Figure 17 , Figure 24 The display device shown is equipped with a feedback module 53. The input terminals of the feedback module 53 are coupled to the first signal demodulation module 521 and the second signal demodulation module 522, respectively, and the output terminals of the feedback module 53 are coupled to the second signal input terminal IN2 and the third signal input terminal IN3, respectively.

[0542] 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 to at least one of the second signal input terminal IN2 and the third signal input terminal IN3, so as to provide feedback of 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.

[0543] In some embodiments, such as Figure 24 As shown, the feedback module 53 can be configured with only one feedback input terminal. Both demodulation modules 521 and 522 are coupled to this feedback input terminal, so that the frequency-locked signals generated by the two demodulation modules 521 and 522 are input to the feedback module 53 through this feedback input terminal. The feedback module 53 then feeds back each frequency-locked signal to IN2 or IN3.

[0544] For example, when the broadcast signals demodulated by both demodulation modules are satellite broadcast signals, in order to facilitate the feedback module 53 in distinguishing 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 in a time-division manner under the instruction of the controller 70. The feedback module 53 can then couple its input terminal to the corresponding signal input terminal IN2 or IN3 at different times under the instruction of the feedback indication signal, thereby feeding back the frequency-locked signal sent at the corresponding time to the corresponding signal input terminal.

[0545] In other embodiments, the frequency-locking signal may carry identification information that identifies different demodulation modules or different signal input terminals, so that the feedback module 53 can distinguish different frequency-locking signals input from the same feedback input terminal and provide accurate feedback.

[0546] In some embodiments, such as Figure 24 As shown, the feedback module 53 can be configured with only one feedback output terminal. Both signal input terminals IN2 and IN3 are coupled to the feedback output terminal, so that the frequency-locked signals to be fed back to the second signal input terminal IN2 and the third signal input terminal IN3 are output by the feedback output terminal.

[0547] For example, when the feedback module 53 is configured with only one feedback output terminal, any frequency locking signal can be fed back to the two signal input terminals IN2 and IN3 respectively. The frequency locking signal can carry the above-mentioned identification information. The frequency conversion device (such as the Unicanable device mentioned above) coupled to the signal input terminals IN2 and IN3 respectively can determine whether to respond to the frequency locking signal based on the identification information in the frequency locking signal. If no response is required, the frequency locking signal is ignored.

[0548] For example, a frequency-locking signal used to lock onto a corresponding frequency point in the first satellite broadcast signal is simultaneously fed back to IN2 and IN3. The frequency conversion device coupled to IN2 can determine, based on the identification information, that it needs to respond to the frequency-locking signal and responds to lock onto the corresponding frequency point in the first satellite broadcast signal; while the frequency conversion device coupled to IN3 can determine, based on the identification information, that it does not need to respond to the frequency-locking signal and directly ignores the frequency-locking signal.

[0549] In some embodiments, when the feedback module 53 is configured with only one feedback input and one feedback output, multiple different feedback paths can be formed between the feedback input and the feedback output based on time-division control, identification information, etc. Under the indication of different feedback indication signals, the feedback module can select different feedback paths, thereby feeding back the frequency-locked signal sent by any demodulation module to either of the two signal inputs IN2 and IN3.

[0550] For example, a third feedback path L3 is provided between the feedback input terminal and the feedback output terminal of the feedback module 53. When the second signal demodulation module 522 demodulates the first satellite broadcast signal received through the second signal input terminal IN2, the controller 70 can send a third feedback indication signal to the feedback module 53. The feedback module 53 responds to the third feedback indication signal to select the third feedback path L3, thereby coupling the second signal demodulation module 522 to the second signal input terminal IN2, so that the second frequency-locked signal generated by the second signal demodulation module 522 is fed back to the second signal input terminal IN2.

[0551] For example, a fourth feedback path L4 is provided between the feedback input terminal and the feedback output terminal of the feedback module 53. When the first signal demodulation module 521 demodulates the second satellite broadcast signal received through the third signal input terminal IN3, the controller 70 can send a fourth feedback indication signal to the feedback module 53. The feedback module 53 responds to the fourth feedback indication signal to select the fourth feedback path L4, thereby coupling the first signal demodulation module 521 with the third signal input terminal IN3, so that the first frequency-locked signal generated by the first signal demodulation module 521 is fed back to the third signal input terminal IN3.

[0552] For example, a first feedback path L1 and a second feedback path L2 may be provided between the feedback input and feedback output of the feedback module 53. When the first feedback path L1 is selected, the first signal demodulation module 521 can be coupled to the second signal input IN2, so that the first frequency-locked signal generated by the first signal demodulation module 521 is fed back to the second signal input IN2. When the second feedback path L2 is selected, the second signal demodulation module 522 can be coupled to the third signal input IN3, so that the second frequency-locked signal generated by the second signal demodulation module 522 is fed back to the third signal input IN3.

[0553] In some embodiments, such as Figure 25 As shown, the feedback module 53 can be configured with two feedback input terminals; wherein, the first feedback input terminal is coupled to the first signal demodulation module 521, and the second feedback input terminal is coupled to the second signal demodulation module 522.

[0554] In some embodiments, such as Figure 25 As shown, the feedback module 53 can be configured with two feedback output terminals; wherein, the first feedback output terminal is coupled to the second signal input terminal IN2, and the second feedback output terminal is coupled to the third signal input terminal IN3.

[0555] Figure 25 In the feedback module 53 shown, different feedback paths are provided between different feedback input terminals and different feedback output terminals.

[0556] Reference Figure 25In different embodiments, the feedback module 53 can select at least one of the following feedback paths:

[0557] The first feedback path L1 is located between the first signal demodulation module 521 and the second signal input terminal IN2. When the first feedback path L1 is selected, the first signal demodulation module 521 is coupled to the second signal input terminal IN2, and the first frequency-locked signal generated by the first signal demodulation module 521 can be fed back to the second signal input terminal IN2.

[0558] The second feedback path L2 is located 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.

[0559] The third feedback path L3 is located between the second signal demodulation module 522 and the second signal input terminal IN2. When the third feedback path L3 is selected, the coupling between the second signal demodulation module 522 and the second signal input terminal IN2 can feed back the second frequency-locked signal to the second signal input terminal IN2.

[0560] The fourth feedback path L4 is located 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.

[0561] It should be noted that the feedback module 53 can implement the above four feedback paths in different ways, and is not limited to... Figure 24 , Figure 25 As shown.

[0562] In some embodiments, the controller 70 is configured not only to receive the TS streams output by each demodulation module and perform playback control or recording control, but also to:

[0563] When the second signal demodulation module 522 demodulates the first satellite broadcast signal received through the second signal input terminal IN2, it 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 locking signal.

[0564] 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, thereby feeding back the second frequency lock signal to the second signal input terminal IN2.

[0565] In the above situation, the controller 70 instructs the second signal demodulation module 522 to generate the second frequency-locking 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-locking signal is fed back to the second signal input terminal IN2 through the third feedback path L3, thereby realizing the locking of the corresponding frequency point in the first satellite broadcast signal demodulated by the second signal demodulation module 522, that is, realizing the accurate locking of the frequency point demodulated by the second signal demodulation module 522 in the modes (2) and (4) mentioned above.

[0566] In some embodiments, controller 70 may be configured to:

[0567] When the first signal demodulation module 521 demodulates the second satellite broadcast signal received through the third signal input terminal IN3, it 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 the first frequency locking signal.

[0568] In addition, a fourth feedback indication signal is generated and sent to the feedback module 53 to instruct the feedback module 53 to select the fourth feedback path L4, so that the first signal demodulation module 521 is coupled to the third signal input terminal IN3, thereby feeding back the first frequency-locked signal to the third signal input terminal IN3.

[0569] In the above situation, the controller 70 instructs the first signal demodulation module 521 to generate the first frequency-locking signal on the one hand, and instructs the feedback module 53 to select the fourth feedback path L4 on the other hand, so that the first frequency-locking 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) mentioned above.

[0570] In other embodiments, the controller 70 can also send a first feedback indication signal to instruct the feedback module 53 to select the first feedback path L1, thereby enabling the first frequency-locking signal generated by the first signal demodulation module 521 to be fed back to the second signal input terminal IN2. For example, it can achieve accurate locking of the frequency point demodulated by the first signal demodulation module 521 in the modes (1), (3) and (4) described above.

[0571] In other embodiments, the controller 70 can also send a second feedback indication signal to instruct the feedback module 53 to select the second feedback path L2, thereby enabling the second frequency-locking signal generated by the second signal demodulation module 522 to be fed back to the third signal input terminal IN3. For example, it can achieve accurate locking of the frequency point demodulated by the second signal demodulation module 522 in the modes (3) and (6) described above.

[0572] It should be noted that the feedback indication signals generated by the controller 70 include the first feedback indication signal, the second feedback indication signal, the third feedback indication signal, the fourth feedback indication signal, etc., which can correspond to the second indication signal k2 in some of the previous embodiments. The relevant embodiments can be referred to each other.

[0573] As mentioned above, relying solely on the first feedback path L1 and the second feedback path L2 will limit the diversity of the display device's operating modes. For example, it will be impossible to achieve the situation described in modes (2) and (4) above, where the first signal demodulation module 521 generates the first frequency-locked signal and feeds it back to the third signal input terminal IN3.

[0574] In this regard, unlike Figure 17 The solution shown is for the display device. Figure 24 The solution provided by the display device is as follows: a feedback module 53 is set up, which provides more feedback paths, including L1 and L2, so that one or more feedback paths can be selected as needed to meet the feedback requirements of the frequency lock signal under different conditions; 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 required feedback path in the corresponding mode through different feedback indication signals.

[0575] visible, Figure 24 The display device shown is equipped with a feedback module 53 with multiple feedback paths. Under different conditions, the feedback module 53 can select different feedback paths according to the control of the controller 70 to meet the feedback requirements of the frequency-locking signal. To lock onto a satellite broadcast signal demodulated by a specific demodulation module, the controller 70 sends a frequency-locking indication signal to that demodulation module. There is no need to adjust the sending destination of the frequency-locking indication signal based on the feedback destination, thus eliminating the need for one demodulation module to generate the frequency-locking signal in place of another. This avoids increasing the generation and feedback time of the frequency-locking signal due to the demodulation module generating the signal being in a dormant or unpowered state. Therefore, Figure 24 The display device shown can improve the response speed of the frequency locking control process, providing users with a smoother operating experience.

[0576] Figure 26 and Figure 27 The different implementations of multiple feedback paths provided by feedback module 53 are shown below, and will be explained in detail below.

[0577] In some embodiments, such as Figure 26 As shown, the feedback module 53 includes a first feedback switch SW1. The first feedback switch SW1 is configured with:

[0578] The first terminal c1 is coupled to the second signal input terminal IN2;

[0579] The second terminal c2 is coupled to the second signal demodulation module 522;

[0580] The third terminal, c3, is coupled to the first signal demodulation module 521.

[0581] The first feedback switch SW1 is equivalent to a single-pole double-throw switch, with its common terminal being the first terminal c1, and its two switching terminals being the second terminal c2 and the third terminal c3. The first feedback switch SW1 responds to different feedback indication signals sent by the controller 70, switching the connection between its common terminal and the two switching terminals as follows:

[0582] In response to the third feedback indication signal, the first feedback switch SW1 can couple the first terminal c1 (common terminal) to the second terminal c2, so that the feedback module 53 selects the third feedback path L3, which in turn couples the second signal demodulation module 522 to the second signal input terminal IN2, thereby feeding back the second frequency-locked signal generated by the second signal demodulation module 522 to IN2; or, in response to the first feedback indication signal, the first feedback switch SW1 can couple the first terminal c1 (common terminal) to the third terminal c3, so that the feedback module 53 selects the first feedback path L1, which in turn couples the first signal demodulation module 521 to the second signal input terminal IN2, thereby feeding back the first frequency-locked signal generated by the first signal demodulation module 521 to IN2.

[0583] In other words, 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, thereby feeding 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.

[0584] In some embodiments, when the feedback module 53 is equipped with the first feedback switch SW1, the second signal demodulation module 522 can be directly coupled to the third signal input terminal IN3, which enables the feedback module 53 to have a second feedback path L2, thereby feeding back the second frequency-locked signal generated by the second signal demodulation module 522 to IN3.

[0585] In some embodiments, such as Figure 26 As shown, the feedback module 53 may include a second feedback switch SW2. The second feedback switch SW2 is configured with:

[0586] The fourth terminal, c4, is coupled to the third signal input terminal, IN3.

[0587] The fifth terminal, c5, is coupled to the first signal demodulation module 521;

[0588] The sixth terminal, c6, is coupled to the second signal demodulation module 522.

[0589] The second feedback switch SW2 is also equivalent to a single-pole double-throw switch, with its common terminal being terminal four (c4) and its two switching terminals being terminal five (c5) and terminal six (c6). The second feedback switch SW2 responds to different feedback indication signals sent by the controller, switching the connection between its common terminal and the two switching terminals as follows:

[0590] 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, which in turn couples the first signal demodulation module 521 with the third signal input terminal IN3, thereby feeding back the first frequency-locked signal generated by the first signal demodulation module 521 to IN3.

[0591] Alternatively, in response to the second feedback indication signal, the second feedback switch SW2 can couple the fourth terminal c4 (common terminal) to the sixth terminal c6, so that the feedback module 53 selects the second feedback path L2, and couples the second signal demodulation module 522 to the third signal input terminal IN3, thereby feeding back the second frequency-locked signal generated by the second signal demodulation module 522 to IN3.

[0592] In other words, by controlling the second feedback switch SW2 through the controller 70, the feedback module 53 can select the second feedback path L2 or the fourth feedback path L4, thereby feeding 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 third signal input terminal IN3.

[0593] In some embodiments, when the feedback module 53 is equipped with a second feedback switch SW2, the first signal demodulation module 521 can be directly coupled to the second signal input terminal IN2, which enables the feedback module 53 to have a first feedback path L1, thereby feeding back the first frequency-locked signal generated by the first signal demodulation module 521 to IN2.

[0594] In some embodiments, the feedback module 53 may simultaneously set a first feedback switch SW1 and a second feedback switch SW2, so that the feedback module 53 can select at least one of the above feedback paths L1 to L4 as needed to realize the frequency locking signal feedback requirements in different modes.

[0595] In some embodiments, such as Figure 27 As shown, the feedback module 53 may include a third feedback switch SW3. The third feedback switch SW3 is configured with:

[0596] The first terminal d1 is coupled to the second signal demodulation module 522;

[0597] The second terminal d2 is coupled to the second signal input terminal IN2;

[0598] The third terminal d3 is coupled to the third signal input terminal IN3.

[0599] The third feedback switch SW3 is equivalent to a single-pole double-throw switch, with its common terminal being the first terminal d1, and its two switching terminals being the second terminal d2 and the third terminal d3. The third feedback switch SW3 responds to different feedback indication signals sent by the controller 70, switching the connection between its common terminal and the two switching terminals as follows:

[0600] In response to the third feedback indication signal, the third feedback switch SW3 can couple the first terminal d1 (common terminal) with the second terminal d2, so that the feedback module 53 selects the third feedback path L3, which in turn couples the second signal demodulation module 522 with the second signal input terminal IN2, thereby feeding back the second frequency-locked signal generated by the second signal demodulation module 522 to IN2.

[0601] Alternatively, in response to the second feedback indication signal, the third feedback switch SW3 can couple the first terminal d1 (common terminal) to the third terminal d3, enabling the feedback module 53 to select the second feedback path L2, and coupling the second signal demodulation module 522 to the third signal input terminal IN3, thereby feeding back the second frequency-locked signal generated by the second signal demodulation module 522 to IN3.

[0602] In other words, 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, thereby feeding back the second frequency-locked signal generated by the second signal demodulation module 522 to IN2 or IN3.

[0603] In some embodiments, when the feedback module 53 is equipped with a third feedback switch SW3, the first signal demodulation module 521 can be directly coupled to the second signal input terminal IN2, which enables the feedback module 53 to have a first feedback path L1, and can realize the feedback of the first frequency-locked signal generated by the first signal demodulation module 521 to IN2.

[0604] In some embodiments, such as Figure 27 As shown, the feedback module 53 may include a fourth feedback switch SW4. The fourth feedback switch SW4 is configured with:

[0605] The fourth terminal d4 is coupled to the first signal demodulation module 521;

[0606] The fifth terminal d5 is coupled to the third signal input terminal IN3;

[0607] The sixth terminal d6 is coupled to the second signal input terminal IN2.

[0608] The fourth feedback switch SW4 is also equivalent to a single-pole double-throw switch, with its common terminal being the fourth terminal d4, and its two switching terminals being the fifth terminal d5 and the sixth terminal d6. The fourth feedback switch SW4 responds to different feedback indication signals sent by the controller 70, switching the connection between its common terminal and the two switching terminals as follows:

[0609] 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, and couples the first signal demodulation module 521 with the second signal input terminal IN2, so as to feed back the first frequency-locked signal generated by the first signal demodulation module 521 to IN2.

[0610] Alternatively, in response to the first feedback indication signal, the fourth feedback switch SW4 can couple the fourth terminal d4 (common terminal) to the sixth terminal d6, so that the feedback module 53 selects the fourth feedback path L4, and couples the first signal demodulation module 521 to the third signal input terminal IN3, thereby feeding back the first frequency-locked signal generated by the first signal demodulation module 521 to IN3.

[0611] In other words, 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, thereby feeding back the first frequency-locked signal generated by the first signal demodulation module 521 to IN2 or IN3.

[0612] In some embodiments, when the feedback module 53 is equipped with a fourth feedback switch SW4, the second signal demodulation module 522 can be directly coupled to the third signal input terminal IN3, so that the feedback module 53 has a local second feedback path L2, thereby feeding back the second frequency-locked signal generated by the second signal demodulation module 522 to IN3.

[0613] In some embodiments, the feedback module 53 may simultaneously set a third feedback switch SW3 and a fourth feedback switch SW4, so that the feedback module 53 can select at least one of the above feedback paths L1 to L4 as needed to realize the frequency locking signal feedback requirements in different modes.

[0614] The above embodiments are combined Figure 26 and Figure 27 This paper introduces the circuit structure and corresponding control method of the feedback module 53 to implement multiple feedback paths, providing a hardware foundation for display devices to achieve multiple working modes. Those skilled in the art should understand that modifications can be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; however, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions in the embodiments of this application.

[0615] in addition, Figure 26 and Figure 27 The diagram also illustrates the specific structure of the input path selection module 51, including a third controllable switch S3, a fourth controllable switch S4, 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, etc., which can be used for... Figure 24 or Figure 25 The display device shown. For details, please refer to the previous section about... Figure 18 The descriptions of related embodiments are omitted here.

[0616] In some embodiments, Figures 24-27 The display device shown can also be equipped with components such as receiving terminals, DC filtering and blocking circuits, and LNAs. The relevant structure can be found in the reference diagram. Figure 23 This will not be elaborated upon here.

[0617] In some embodiments, the input path selection module 51 of the display device may be configured with a second signal input terminal IN2 and a third signal input terminal IN3, which are respectively used to receive the first DVB-S / S2 signal and the second DVB-S / S2 signal, such as... Figures 24-25 As shown; combined with Figures 26-27 Any of the feedback modules 53 shown can implement multiple working modes, including but not limited to the above modes (3), (4) or (6).

[0618] Specifically, for mode (3), which involves the display device receiving the first DVB-S / S2 signal at the second signal input terminal IN2 and the second DVB-S / S2 signal at the third signal input terminal IN3, the broadcast signal input and processing process can be found in [reference needed]. Figure 21 And related embodiments; the frequency locking control process of the display device is as follows:

[0619] 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 the first frequency locking signal.

[0620] 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;

[0621] The controller 70 generates a first feedback indication signal and a second feedback indication signal, and sends them to the feedback module 53. The feedback module 53 selects the first feedback path L1 and the second feedback path L2, so that the first signal demodulation module 521 is coupled to IN2 and the second signal demodulation module 522 is coupled to IN3. This allows the first frequency-locking signal to be fed back to IN2 and the second frequency-locking signal to IN3, thereby locking the corresponding frequency point in the first satellite broadcast signal demodulated by the first signal demodulation module 521 and locking the corresponding frequency point in the second satellite broadcast signal demodulated by the second signal demodulation module 522.

[0622] For example, feedback module 53 adopts Figure 26 In the structure shown, in mode (3), the first feedback indication signal generated by the controller 70 can control the coupling of the first terminal c1 and the third terminal c3 of the first feedback switch SW1, and the second feedback indication signal generated by the controller 70 can control the coupling of the fourth terminal c4 and the sixth terminal c6 of the second feedback switch SW2, thereby enabling the feedback module 53 to select the first feedback path L1 and the second feedback path L2.

[0623] Similarly, feedback module 53 adopts Figure 27 In other structures, 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 here.

[0624] As can be seen, in mode (3), based on the above feedback control of controller 70, feedback module 53 can feed back the first frequency-locking signal generated by first signal demodulation module 521 to IN 2 through first feedback path L1, thereby locking the corresponding frequency point in the first DVB-S / S2 signal demodulated by first signal demodulation module 521; in addition, feedback module 53 can feed back the second frequency-locking signal generated by second signal demodulation module 522 to IN3 through second feedback path L2, thereby locking the corresponding frequency point in the second DVB-S / S2 signal demodulated by second signal demodulation module 522.

[0625] For mode (4), where the second signal input terminal IN2 receives the first DVB-S / S2 signal under the Unicapable standard, the broadcast signal input and processing process of the display device can be referred to... Figure 22 And related embodiments; the frequency locking control process of the display device is as follows:

[0626] 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 the first frequency locking signal.

[0627] 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;

[0628] The controller 70 generates a first feedback indication signal and a third feedback indication signal and sends them to the feedback module 53, instructing 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 respectively coupled to IN2, so that the first frequency locking signal and the second frequency locking signal are both fed back to IN2, thereby achieving locking of two different frequency points in the first DVB-S / S2 signal demodulated by the two demodulation modules respectively.

[0629] For example, feedback module 53 adopts Figure 26 In the structure shown, in mode (4), the controller 70 can first control the first terminal c1 of the first feedback switch SW1 to couple with the third terminal 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-locking signal to IN2. Then, the controller 70 can control the first terminal c1 of the first feedback switch SW1 to couple with the second terminal 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-locking signal to IN2. Of course, the controller 70 can also control the feedback module 53 to first select the third feedback path L3 and then select the first feedback path L1 through the feedback indication signal to achieve the same control effect, which will not be elaborated here.

[0630] Similarly, feedback module 53 adopts Figure 27 In other structures, 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 will not be described in detail here.

[0631] As can be seen, in mode (4), based on the above feedback control of controller 70, feedback module 53 can select the first feedback path L1 and the third feedback path L3 respectively, so that 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 are both fed back to IN 2, thereby realizing 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.

[0632] Furthermore, pattern (6) is similar to pattern (4) above, and will be briefly described below based on... Figure 24 or Figure 25 The process of implementing mode (6) of the display device is shown.

[0633] For mode (6), i.e., when the third signal input terminal IN3 receives the second DVB-S / S2 signal under the Unicapable standard, the broadcast signal input and processing process of the display device is as follows, referring to the relevant embodiments above; the frequency locking control process of the display device is as follows:

[0634] 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 the first frequency locking signal.

[0635] 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;

[0636] The controller 70 generates a second feedback indication signal and a fourth feedback indication signal, and sends them to the feedback module 53, instructing the feedback module 53 to select 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 respectively coupled to IN3, so that the first frequency locking signal and the second frequency locking signal are both fed back to IN3, thereby achieving locking of two different frequency points in the second DVB-S / S2 signal demodulated by the two demodulation modules respectively.

[0637] In some embodiments, in addition to IN2 and IN3, the input path selection module 51 can also be configured with a first signal input terminal IN1 for receiving DVB-T / T2 / C signals, such as... Figures 26-27 As shown, the display device can achieve the mode (5) described above. For details, please refer to... Figure 18 The relevant embodiments are not described in detail here.

[0638] In some embodiments, based on the first signal input terminal IN1, and combined with Figures 24-27 The feedback module 53 can also enable the display device to achieve multiple working modes, including but not limited to the modes (1) and (2) mentioned above.

[0639] Specifically, for mode (1), where the second signal input terminal IN2 first receives the first DVB-S / S2 signal and the first signal input terminal IN1 then receives the DVB-T / T2 / C signal, the broadcast signal input and processing process of the display device can be referred to... Figure 19 And related embodiments; the frequency locking control process of the display device is as follows:

[0640] 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 the first frequency locking signal.

[0641] The controller 70 generates a first feedback indication signal and sends it to the feedback module 53, instructing the feedback module 53 to select the first feedback path L1, thereby coupling the first signal demodulation module 521 with IN2, and feeding back the first frequency-locking signal to IN2, thus locking the corresponding frequency point in the first DVB-S / S2 signal demodulated by the first signal demodulation module 521.

[0642] For mode (2), where the first signal input terminal IN1 first receives the DVB-T / T2 / C signal and the second signal input terminal IN2 then receives the first DVB-S / S2 signal, the broadcast signal input and processing process of the display device can be referred to Figure 20 And related embodiments; the frequency locking control process of the display device is as follows:

[0643] 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;

[0644] The controller 70 generates a third feedback indication signal and sends it to the feedback module 53, instructing the feedback module 53 to establish a third feedback path L3, so that the second signal demodulation module 522 is coupled to IN2, and the second frequency locking signal is fed back to IN2, thereby locking the corresponding frequency point in the first DVB-S / S2 signal demodulated by the second signal demodulation module 522.

[0645] visible, Figures 24-27 The display device shown can realize multiple working modes, including but not limited to the above modes (1) to (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 locking signal in the corresponding mode, thereby realizing the accurate locking of the corresponding frequency point in the satellite broadcast signal.

[0646] In other words, for Figures 24-27 For the controller 70 of the display device shown, to lock onto the frequency point demodulated by a particular demodulation module, a frequency lock indication signal is sent to that demodulation module. Each demodulation module generates a frequency lock signal specifically for locking onto its own demodulated frequency point; there is no... Figure 17 The display device shown does not exhibit a situation where one demodulation module generates the frequency-locking signal in place of another demodulation module, nor does it exhibit a situation where a demodulation module in sleep or not powered on generates the frequency-locking signal in place of another demodulation module. Therefore, it does not require waiting for the corresponding demodulation module to wake up or be powered on, which can ensure the feedback efficiency and accuracy of the frequency-locking signal. Consequently, it can provide a faster and more accurate response in user operations such as channel switching, thereby improving the user experience.

[0647] In some embodiments, Figures 24-27The display device shown may also include one or two LNB units in the feedback module 53, namely the first LNB unit 531 and the second LNB unit 532 mentioned above, for power management and control of external devices (such as Unicanable devices) of the display device.

[0648] In different embodiments, the LNB unit can be located upstream of each feedback switch (relative to the transmission direction of the frequency lock signal) or downstream of each feedback switch, forming different circuit structures.

[0649] In some embodiments, based on Figure 26 The feedback module 53 shown can be located upstream of each feedback switch, that is, as shown in the figure. Figure 28 As shown:

[0650] The input terminal of the first LNB unit 531 is coupled to the first signal demodulation module 521, and the output terminal of the first LNB unit 531 is coupled to the third terminal c3 of the first feedback switch SW1 and the fifth terminal c5 of the second feedback switch SW2.

[0651] The input terminal of the second LNB unit 532 is coupled to the second signal demodulation module 522, and the output terminal of the second LNB unit 532 is coupled to the second terminal c2 of the first feedback switch SW1 and the sixth terminal c6 of the second feedback switch SW2.

[0652] In some embodiments, based on Figure 26 The feedback module 53 shown can be located downstream of each feedback switch, that is, as shown in the figure. Figure 29 As shown:

[0653] The input terminal of the first LNB unit 531 is coupled to the first terminal c1 of the first feedback switch SW1, and the output terminal of the first LNB unit 531 is coupled to the second signal input terminal IN2.

[0654] The input terminal of the second LNB unit 532 is coupled to the fourth terminal c4 of the second feedback switch SW2, and the output terminal of the second LNB unit 532 is coupled to the third signal input terminal IN3.

[0655] In some embodiments, based on Figure 27 The feedback module 53 shown can be located upstream of each feedback switch, that is, as shown in the figure. Figure 30 As shown:

[0656] The input terminal of the first LNB unit 531 is coupled to the first signal demodulation module 521, and the output terminal of the first LNB unit 531 is coupled to the fourth terminal d4 of the fourth feedback switch SW4.

[0657] The input terminal of the second LNB unit 532 is coupled to the second signal demodulation module 522, and the output terminal of the second LNB unit 532 is coupled to the first terminal d1 of the third feedback switch SW3.

[0658] In some embodiments, based on Figure 27 The feedback module 53 shown can be located downstream of each feedback switch, that is, as shown in the figure. Figure 31 As shown:

[0659] The input terminal of the first LNB unit 531 is coupled to the second terminal d2 of the third feedback switch SW3 and the sixth terminal d6 of the fourth feedback switch SW4, respectively. The output terminal of the first LNB unit 531 is coupled to the second signal input terminal IN2.

[0660] The input terminal of the second LNB unit 531 is coupled to the third terminal d3 of the third feedback switch SW3 and the fifth terminal d5 of the fourth feedback switch SW4, respectively. The output terminal of the second LNB unit 532 is coupled to the third signal input terminal IN3.

[0661] It should be noted that, Figures 25-30 The feedback switches SW1 to SW4 shown can correspond to the second path selection switch 255' in some of the embodiments and figures above; Figure 30 The positional relationship between the LNB unit and the feedback switch in the middle Figure 14b , Figure 16b It is also shown in the text. Figure 31 The positional relationship between the LNB unit and the feedback switch in the middle Figure 14a , Figure 16a As also shown in the document, the relevant embodiments can be referred to each other.

[0662] according to Figures 26-31 As can be seen, different wiring methods for the feedback switches and different relative positions of the feedback switches and LNB units can form display devices with different structures. All of these can achieve accurate feedback of the frequency locking signal in different modes, and also provide more possibilities and flexibility for the circuit layout design of related display devices. Display devices with other structures formed by modifications or replacements based on this are also within the scope of the embodiments of this application.

[0663] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

[0664] For ease of explanation, the above description has been provided in conjunction with specific embodiments. The exemplary discussion above is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. Various modifications and variations can be obtained based on the above teachings. The selection and description of the above embodiments are for the purpose of better explaining the principles and practical applications, thereby enabling those skilled in the art to better utilize the described embodiments and various different variations of embodiments suitable for specific application considerations.

Claims

1. A display device, characterized in that, include: The input path selection module has the following settings: The second signal input terminal is configured to receive the first satellite broadcast signal; The third signal input terminal is configured to receive the second satellite broadcast signal; First signal output terminal; as well as, Second signal output terminal; The input path selection module is configured to couple the second signal input terminal to at least one of the first signal output terminal and the second signal output terminal; and to couple the third signal input terminal to at least one of the first signal output terminal and the second signal output terminal. The first signal demodulation module, coupled to the first signal output terminal, is configured to perform channel demodulation on the broadcast signal output through the first signal output terminal to obtain a TS stream, and can generate a first frequency-locked signal. The second signal demodulation module, coupled to the second signal output terminal, is configured to perform channel demodulation on the broadcast signal output through the second signal output terminal to obtain a TS stream, and can generate a second frequency-locked signal; Feedback module; The input terminal of the feedback module can be coupled to the first signal demodulation module and the second signal demodulation module; The output terminal of the feedback module can be coupled to the second signal input terminal and the third signal input terminal; the controller is configured to: When the second signal demodulation module demodulates the first satellite broadcast signal received through the second signal input terminal, a second frequency locking indication signal is sent to the second signal demodulation module to instruct the second signal demodulation module to generate a second frequency locking signal; and a third feedback indication signal is sent to the feedback module to instruct the feedback module to couple the second signal demodulation module to the second signal input terminal so that the second frequency locking signal is fed back to the second signal input terminal. The second frequency-locking signal is used to lock the frequency point in the first satellite broadcast signal that has been demodulated by the second signal demodulation module.

2. The display device according to claim 1, characterized in that, The controller is also configured to: When the first signal demodulation module demodulates the second satellite broadcast signal received through the third signal input terminal, a first frequency locking indication signal is sent to the first signal demodulation module to instruct the first signal demodulation module to generate a first frequency locking signal; and a fourth feedback indication signal is sent to the feedback module to instruct the feedback module to couple the first signal demodulation module to the third signal input terminal so that the first frequency locking signal is fed back to the third signal input terminal. The first frequency-locking signal is used to lock the frequency point in the second satellite broadcast signal that has been demodulated by the first signal demodulation module.

3. The display device according to claim 1, characterized in that, The feedback module is configured with: The feedback input terminal is coupled to the first signal demodulation module and the second signal demodulation module, respectively; The feedback output terminal is coupled to the second signal input terminal and the third signal input terminal, respectively. The third feedback path and the fourth feedback path are located between the feedback input terminal and the feedback output terminal; The feedback module is configured to select the third feedback path in response to the third feedback indication signal, and to select the fourth feedback path in response to the fourth feedback indication signal; The controller is configured as follows: When the second signal demodulation module demodulates the first satellite broadcast signal received through the second signal input terminal, it sends the third feedback indication signal to the feedback module to instruct the feedback module to select the third feedback path, thereby coupling the second signal demodulation module to the second signal input terminal and feeding back the second frequency-locked signal to the second signal input terminal.

4. The display device according to claim 3, characterized in that, The controller is configured as follows: When the first signal demodulation module demodulates the second satellite broadcast signal received through the third signal input terminal, it sends the fourth feedback indication signal to the feedback module to instruct the feedback module to select the fourth feedback path, thereby coupling the first signal demodulation module with the third signal input terminal and feeding the first frequency-locked signal back to the third signal input terminal.

5. The display device according to claim 3, characterized in that, The feedback module is configured with: The first feedback input terminal is coupled to the first signal demodulation module; The second feedback input terminal is coupled to the second signal demodulation module; The first feedback output terminal is coupled to the second signal input terminal; The second feedback output terminal is coupled to the third signal input terminal; The third feedback path is provided between the second feedback input terminal and the first feedback output terminal; the fourth feedback path is provided between the first feedback input terminal and the second feedback output terminal.

6. The display device according to claim 1, characterized in that, When the first satellite broadcast signal is received at the second signal input terminal, the input path selection module is configured as follows: The second signal input terminal is coupled to the first signal output terminal and the second signal output terminal respectively, so that the first satellite broadcast signal can be demodulated by the first signal demodulation module and the second signal demodulation module respectively; The controller is configured as follows: Send a first frequency-locking indication 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 indication 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 indication signal and a third feedback indication signal to the feedback module, instructing the feedback module to couple the first signal demodulation module and the second signal demodulation module to the second signal input terminal respectively, so that the first frequency locking signal and the second frequency locking signal are both fed back to the second signal input terminal, thereby locking the corresponding frequency point in the first satellite broadcast signal.

7. The display device according to claim 1, characterized in that, When the first satellite broadcast signal is received at the second signal input terminal and the second satellite broadcast signal is received at the third signal input terminal, the input path selection module is configured as follows: The second signal input terminal is coupled to the first signal output terminal, and the third signal input terminal is coupled to the second signal output terminal, so as to demodulate the first satellite broadcast signal through the first signal demodulation module and demodulate the second satellite broadcast signal through the second signal demodulation module; The controller is configured as follows: Send a first frequency-locking indication 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 indication signal to the second signal demodulation module to instruct the second signal demodulation module to generate the second frequency-locking signal; A first feedback indication signal and a second feedback indication signal are sent to the feedback module, respectively instructing the feedback module to couple the first signal demodulation module to the second signal input terminal and the second signal demodulation module to the third signal input terminal, so that the first frequency locking signal is fed back to the second signal input terminal and the second frequency locking signal is fed back to the third signal input terminal, thereby locking the corresponding frequency points in the first satellite broadcast signal and the second satellite broadcast signal.

8. The display device according to claim 1, characterized in that, The input path selection module is also provided with: The first signal input terminal is configured to receive terrestrial broadcast signals; When the first signal input terminal receives a ground broadcast signal first, and the second signal input terminal subsequently receives the first satellite broadcast signal, the input path selection module is configured as follows: The first signal input terminal is coupled to the first signal output terminal so as to demodulate the terrestrial broadcast signal through the first signal demodulation module; The second signal input terminal is coupled to the second signal output terminal so as to demodulate the first satellite broadcast signal through the second signal demodulation module; The controller is configured as follows: Send a second frequency-locking indication signal to the second signal demodulation module to instruct the second signal demodulation module to generate the second frequency-locking signal; A second feedback indication signal is sent to the feedback module, instructing the feedback module to couple the second signal demodulation module to the second signal input terminal, so that the second frequency locking signal is fed back to the second signal input terminal, thereby locking the corresponding frequency point in the first satellite broadcast signal.

9. The display device according to claim 1, characterized in that, The input path selection module is also provided with: The first signal input terminal is configured to receive terrestrial broadcast signals; When the second signal input terminal receives the first satellite broadcast signal first, and the first signal input terminal then receives the ground broadcast signal, the input path selection module is configured as follows: The second signal input terminal is coupled to the first signal output terminal so as to demodulate the first satellite broadcast signal through the first signal demodulation module; The first signal input terminal is coupled to the third signal output terminal so that the terrestrial broadcast signal can be demodulated by the third signal demodulation module; The controller is configured as follows: Send a first frequency-locking indication signal to the first signal demodulation module to instruct the first signal demodulation module to generate the first frequency-locking signal; A first feedback indication signal is sent to the feedback module, instructing the feedback module to couple the first signal demodulation module to the second signal input terminal, so that the first frequency locking signal is fed back to the second signal input terminal, thereby locking the corresponding frequency point in the first satellite broadcast signal.

10. The display device according to claim 1, characterized in that, The controller is also configured to generate a first indication signal; The input path selection module includes: A third controllable switch; the third controllable switch includes: The common terminal of the third switch is coupled to the second signal input terminal; The two third switch terminals are respectively coupled to the first signal output terminal and the second signal output terminal; The third controllable switch is configured to, in response to the first indication signal, establish or disconnect the coupling between the common terminal of the third switch 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 at least one third switch switching terminal.

11. The display device according to claim 1, characterized in that, The controller is also configured to generate a first indication signal; The input path selection module includes: The fourth controllable switch; the fourth controllable switch includes: The common terminal of the fourth switch is coupled to the third signal input terminal; The two fourth switch terminals are respectively coupled to the first signal output terminal and the second signal output terminal; The fourth controllable switch is configured to, in response to the first indication signal, establish or disconnect the coupling between the common terminal of the fourth switch 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 at least one fourth switch switching terminal.

12. The display device according to claim 1, characterized in that, The feedback module includes: The first feedback switch is configured with: The first terminal is coupled to the second signal input terminal; The second end is coupled to the second signal demodulation module; The third terminal is coupled to the first signal demodulation module; The first feedback switch is configured to perform any of the following: In response to the third feedback indication signal, the first terminal is coupled to the second terminal, so that the second signal demodulation module is coupled to the second signal input terminal; or, In response to a first feedback indication signal, the first terminal is coupled to the third terminal so that the first signal demodulation module is coupled to the second signal input terminal.

13. The display device according to claim 1 or 12, characterized in that, The feedback module includes: a second feedback switch; The second feedback switch is equipped with: The fourth terminal is coupled to the third signal input terminal; The fifth terminal is coupled to the first signal demodulation module; The sixth terminal is coupled to the second signal demodulation module; The second feedback switch is configured to perform any of the following: In response to a fourth feedback indication signal, the fourth terminal is coupled to the fifth terminal, so that the first signal demodulation module is coupled to the third signal input terminal; or, In response to the second feedback indication signal, the fourth terminal is coupled to the sixth terminal so that the second signal demodulation module is coupled to the third signal input terminal.

14. The display device according to claim 1, characterized in that, The feedback module includes: The third feedback switch is configured with: The first end is coupled to the second signal demodulation module; The second terminal is coupled to the second signal input terminal; The third terminal is coupled to the third signal input terminal; The third feedback switch is configured to perform any of the following: In response to the third feedback indication signal, the first terminal is coupled to the second terminal, so that the second signal demodulation module is coupled to the second signal input terminal; or, In response to a second feedback indication signal, the first terminal is coupled to the third terminal so that the second signal demodulation module is coupled to the third signal input terminal.

15. The display device according to claim 1 or 14, characterized in that, The feedback module includes: a fourth feedback switch; The fourth feedback switch is equipped with: The fourth terminal is coupled to the first signal demodulation module; The fifth terminal is coupled to the third signal input terminal; The sixth terminal is coupled to the second signal input terminal; The fourth feedback switch is configured to perform any of the following: In response to a fourth feedback indication signal, the fourth terminal is coupled to the fifth terminal, so that the first signal demodulation module is coupled to the third signal input terminal; or, In response to the first feedback indication signal, the fourth terminal is coupled to the sixth terminal so that the first signal demodulation module is coupled to the second signal input terminal.

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