Screen splitting system and device based on HDMI (High Definition Multimedia Interface)

Abstract

The utility model relates to an HDMI-based screen splitting system and device, the HDM I-based screen splitting system comprises a voltage reduction module, a connector, an HDM I splitter, a USB-HUB, an audio module and two HDM I interfaces, the HDM I splitter is respectively connected with the audio module and the two HDM I interfaces, and the connector is respectively connected with the voltage reduction module, the USB-HUB and the HDM I splitter; wherein the step-down module is used for converting an input alternating current into a steady-state voltage, and when a split-screen signal is obtained, the connector controls the HDM I splitter, performs split-screen signal transmission on the two HDM I interfaces, and transmits data to the audio module. By adopting the combination of the step-down module, the connector, the HDM I splitter, the USB-HUB, the audio module and the two HDM I interfaces, a video source is copied and displayed on the same display device in a split-screen manner, so that the efficiency and the convenience of a user during multi-task processing are greatly improved.

Description

Technical Field

[0001] This application relates to the technical field of display system design. Specifically, it relates to a split-screen system and device based on HDMI. Background Art

[0002] In some application scenarios, generally, a single video source can only correspond to one display device. When a user wants to view the playback interface of the same video source on another display device, video source replication and split-screen display are required. Since current display devices only support single-channel video playback, when a user has only one display device and needs to view multiple video source devices simultaneously, the operation cannot be performed. Utility Model Content

[0003] The purpose of this application is to provide a split-screen system and device based on HDMI to solve the problem that existing display devices only support single-channel video playback and it is difficult to meet the requirements of split-screen display.

[0004] To solve the above problems, the following technical solutions are adopted in this application for implementation:

[0005] The first aspect of this application provides a split-screen system based on HDMI. The split-screen system based on HDMI includes: a buck module, a connector, an HDMI splitter, a USB-HUB, an audio module, and two HDMI interfaces. The HDMI splitter is respectively connected to the audio module and the two HDMI interfaces, and the connector is respectively connected to the buck module, the USB-HUB, and the HDMI splitter; wherein, the buck module is used to convert the input alternating current to a steady-state voltage. When a split-screen signal is obtained, the connector controls the HDMI splitter to transmit the split-screen signal to the two HDMI interfaces and transmit data to the audio module.

[0006] The buck module converts the input alternating current into a steady-state voltage suitable for the operation of various electronic components, ensuring the power demand of the entire split-screen system. The connector not only connects the buck module, the USB-HUB, and the HDMI splitter, but also connects the audio module and two HDMI interfaces through the HDMI splitter, ensuring the smooth transmission of signals and data. The HDMI splitter can process the split-screen signal, enabling the same video source to be simultaneously displayed on two HDMI interfaces. With the data transmission function of the audio module, users can enjoy the viewing experience of multiple video sources on one display device.

[0007] Further, the buck module includes a TR buck regulator and a first capacitive reactance circuit. One end of the TR buck regulator is connected to the input alternating current, the other end of the TR buck regulator is connected to one end of the first capacitive reactance circuit, and the other end of the first capacitive reactance circuit is grounded.

[0008] By introducing a TR step-down voltage regulator and a first capacitive reactance circuit, the influence of input voltage fluctuations on the output voltage can be effectively reduced, energy loss can be decreased, the impact of voltage fluctuations on the load can be reduced, and the load can be protected from damage, thereby improving the stability of the entire power supply system.

[0009] Furthermore, the HDMI-based split screen system includes an ESD protector, and the ESD protector is respectively connected to the HDMI interface and the HDMI splitter.

[0010] The ESD protector can absorb and disperse static electricity. By introducing the ESD protector, damage to the HDMI interface and the HDMI splitter caused by static electricity can be prevented, thereby improving the stability of the entire split screen system.

[0011] Furthermore, the HDMI-based split screen system includes a plurality of the ESD protectors, and the plurality of ESD protectors are arranged in parallel.

[0012] By arranging a plurality of ESD protectors in parallel, it is ensured that the HDMI interface and the splitter are not damaged by static electricity. Connecting multiple ESD protectors in parallel helps to maintain the stability of the HDMI signal and reduce the risk of signal loss or damage.

[0013] Furthermore, the HDMI-based split screen system includes a Schottky diode. One end of the Schottky diode is connected to the power supply, and the other end of the Schottky diode is connected to the HDMI interface.

[0014] The Schottky diode can provide additional protection measures. By using the Schottky diode, damage to the HDMI interface caused by power supply fluctuations can be prevented, thereby improving the stability and durability of the interface.

[0015] Furthermore, the HDMI splitter includes a splitter chip and a first filter circuit. The splitter chip is respectively connected to the connector, the audio module, the HDMI interface, and one end of the first filter circuit, and the other end of the first filter circuit is grounded.

[0016] By using the splitter chip and the first filter circuit, signal interference and electromagnetic leakage can be effectively reduced, the anti-interference ability of the system can be improved, system failures caused by external electromagnetic interference can be reduced, and the purity of the HDMI signal can be maintained.

[0017] Furthermore, the HDMI splitter includes a second capacitive reactance circuit. One end of the second capacitive reactance circuit is connected to the ESD protector, and the other end of the second capacitive reactance circuit is connected to the splitter chip.

[0018] The second capacitive reactance circuit can provide additional protection measures to prevent the ESD protector from generating excessive voltage on the splitter chip when absorbing static electricity, thereby protecting the splitter chip from damage.

[0019] Further, the audio module includes an audio DAC chip and a second impedance circuit, and the second impedance circuit is respectively connected to the audio DAC chip and the HDMI splitter.

[0020] The audio DAC chip can process various audio formats to ensure that the audio module can be compatible with different audio devices. The introduction of the second impedance circuit can achieve impedance matching between the audio DAC chip and the HDMI splitter, reduce signal reflection and loss, and thus improve the quality and clarity of the audio signal.

[0021] Further, the audio module includes a second filtering circuit. One end of the second filtering circuit is connected to the audio DAC chip, and the other end of the second filtering circuit is connected to the audio signal output end.

[0022] By using the second filtering circuit, the noise and interference in the audio signal can be effectively reduced, the purity of the audio signal can be improved, and a better auditory experience can be provided for users.

[0023] This application also provides an HDMI-based split screen device, and the HDMI-based split screen device includes the HDMI-based split screen system described in any one of the above.

[0024] Compared with the prior art, the beneficial effects of this application are as follows: By setting the buck module, the input alternating current is converted into a steady-state voltage suitable for the operation of various electronic components, ensuring the power demand of the entire split screen system. By connecting the audio module and two HDMI interfaces through the HDMI splitter, the smooth transmission of signals and data is ensured. The HDMI splitter can process the split screen signal, enabling the same video source to be simultaneously displayed on two HDMI interfaces. With the data transmission function of the audio module, users can enjoy the viewing experience of multiple video sources on one display device. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a system diagram of an HDMI-based split screen system provided by an embodiment of this application;

[0026] Figure 2 It is a schematic diagram of an HDMI-based split screen provided by an embodiment of this application;

[0027] Figure 3 It is a schematic diagram of a buck module provided by an embodiment of this application;

[0028] Figure 4Schematic diagram of a connector provided by an embodiment of the present application;

[0029] Figure 5 Schematic diagram of an HDMI splitter provided by an embodiment of the present application;

[0030] Figure 6 Schematic diagram of an HDMI interface provided by an embodiment of the present application;

[0031] Figure 7 Schematic diagram of an ESD protector provided by an embodiment of the present application; and

[0032] Figure 8 Schematic diagram of an audio module provided by an embodiment of the present application.

[0033] Description of reference numerals:

[0034] 100, buck module; 110, TR buck regulator; 120, first capacitive reactance circuit; 200, connector; 300, HDMI splitter; 310, splitter chip; 320 first filter circuit; 330, second capacitive reactance circuit; 400, USB-HUB; 500, audio module; 510, audio DAC chip; 520, second impedance circuit; 530, second filter circuit; 600, HDMI interface; 700, ESD protector; 800, Schottky diode. Detailed implementation manners

[0035] The following describes in detail the detailed implementation manners of the present application with reference to the accompanying drawings.

[0036] It should be noted that, without conflict, the embodiments in the present application and the technical features in the embodiments can be combined with each other. The detailed description in the detailed implementation manners should be understood as an explanatory illustration of the purpose of the present application and should not be regarded as an improper limitation of the present application.

[0037] It should be understood that the orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings. These orientation terms are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present application.

[0038] Figure 1 System diagram of a split-screen system based on HDMI provided by an embodiment of the present application, Figure 2 Schematic diagram of a split screen based on HDMI provided by an embodiment of the present application, Figure 3 Schematic diagram of a buck module provided by an embodiment of the present application, Figure 4Schematic diagram of a connector provided by an embodiment of the present application. 5 is a schematic diagram of an HDMI splitter provided by an embodiment of the present application. Figure 6 Schematic diagram of an HDMI interface provided by an embodiment of the present application. Figure 7 Schematic diagram of an ESD protector provided by an embodiment of the present application. Figure 8 Schematic diagram of an audio module provided by an embodiment of the present application. As Figures 1 to 8 As shown, an embodiment of the present application provides a split-screen system based on HDMI. The split-screen system based on HDMI includes: a buck module 100, a connector 200, an HDMI splitter 300, a USB-HUB 400, an audio module 500, and two HDMI interfaces 600. The HDMI splitter 300 is respectively connected to the audio module 500 and the two HDMI interfaces 600, and the connector 200 is respectively connected to the buck module 100, the USB-HUB 400, and the HDMI splitter 300. Among them, the buck module 100 is used to convert the input alternating current into a steady-state voltage. When a split-screen signal is obtained, the connector 200 controls the HDMI splitter 300 to transmit the split-screen signal to the two HDMI interfaces 600 and transmit data to the audio module 500.

[0039] Specifically, the buck module 100 is used to convert the input alternating current into a steady-state voltage to provide stable power for the entire split-screen system. The connector 200 is used to connect the buck module 100, the USB-HUB 400, and the HDMI splitter 300, and is responsible for transmitting the voltage provided by the buck module to other components and ensuring signal transmission between components. The HDMI splitter 300 is the core component of the system, connecting the audio module 500 and the two HDMI interfaces 600. The splitter 300 is responsible for splitting a single HDMI signal into two paths and transmitting them to the two HDMI interfaces 600 respectively to achieve split-screen display. The USB-HUB 400 is used to connect the user's USB devices to expand the number of USB interfaces of the system and facilitate the user to connect various USB peripherals. The audio module 500 includes an audio DAC chip and a second filter circuit, and is responsible for processing audio signals. The noise and interference are filtered by the second filter circuit to improve the quality of the audio signal. One end of the audio module 500 is connected to the HDMI splitter 300, and the other end outputs the audio signal through the audio signal output terminal. The two HDMI interfaces 600 are respectively connected to the user's display device to achieve split-screen display of video signals.

[0040] For example, first connect the video source device to the connector 200 between the step-down module 100 and the HDMI splitter 300. The connector 200 controls the HDMI splitter 300 to split a single HDMI signal into two paths, which are respectively transmitted to two HDMI interfaces 600. The audio module 500 processes the audio signal, filters out noise and interference, and improves the quality of the audio signal. One end of the audio module 500 is connected to the HDMI splitter 300, and the other end outputs the audio signal through the audio signal output terminal. Users can view the same video source playback interface on two display devices simultaneously, achieving synchronous output of video and audio.

[0041] The step-down module 100 converts the input alternating current into a steady-state voltage suitable for the operation of various electronic components, ensuring the power demand of the entire split-screen system. The connector 200 not only connects the step-down module 100, the USB-HUB 400, and the HDMI splitter 300, but also connects the audio module 500 and two HDMI interfaces 600 through the HDMI splitter 300, ensuring the smooth transmission of signals and data. The HDMI splitter 300 can process the split-screen signal, enabling the same video source to be simultaneously displayed on two HDMI interfaces 600. With the data transmission function of the audio module 500, users can enjoy the viewing experience of multiple video sources on one display device.

[0042] In some embodiments, the step-down module 100 includes a TR step-down voltage regulator 110 and a first capacitive reactance circuit 120. One end of the TR step-down voltage regulator 110 is connected to the input alternating current, and the other end of the TR step-down voltage regulator 110 is connected to one end of the first capacitive reactance circuit 120. The other end of the first capacitive reactance circuit 120 is grounded.

[0043] Specifically, the TR step-down voltage regulator 110 converts the input alternating current into a lower steady-state voltage, providing a stable power supply for other components. The first capacitive reactance circuit 120 is connected to the TR step-down voltage regulator 110 and is used to filter out noise and interference on the power line, improving the stability and purity of the output voltage.

[0044] For example, the input alternating current is connected to one end of the TR step-down voltage regulator 110. The TR step-down voltage regulator 110 converts the input alternating current into a steady-state voltage and then outputs the voltage to one end of the first capacitive reactance circuit 120. The first capacitive reactance circuit 120 filters out noise and interference on the power line, improving the stability and purity of the output voltage. The other end of the first capacitive reactance circuit 120 is grounded to provide a safe and reliable power supply.

[0045] By introducing the TR step-down voltage regulator 110 and the first capacitive reactance circuit 120, the impact of input voltage fluctuations on the output voltage can be effectively reduced, energy loss can be decreased, the impact of voltage fluctuations on the load can be minimized, and the load can be protected from damage, thereby improving the stability of the entire power supply system.

[0046] In some embodiments, the HDMI-based split-screen system includes an ESD protector 700, and the ESD protector 700 is respectively connected to an HDMI interface 600 and an HDMI splitter 300.

[0047] Specifically, the ESD protector 700 is used to prevent electrostatic discharge (ESD) from damaging the HDMI interface 600 and the HDMI splitter 300. The ESD protector 700 can clamp and disperse electrostatic pulses without damaging the signal quality, thereby protecting the subsequent circuits. The HDMI interface 600 is used to connect a video source device and the split-screen system to achieve the transmission of high-definition video signals. Since the ESD protector 700 is respectively connected to the HDMI interface 600 and the HDMI splitter 300, the ESD protector 700 can protect the signals received from the HDMI interface 600 and prevent electrostatic pulses from damaging the HDMI splitter 300 and its subsequent circuits.

[0048] The ESD protector 700 can absorb and disperse static electricity. By introducing the ESD protector 700, it is possible to prevent static electricity from damaging the HDMI interface 600 and the HDMI splitter 300, thereby improving the stability of the entire split-screen system.

[0049] In some embodiments, the HDMI-based split-screen system includes a plurality of ESD protectors 700, and the plurality of ESD protectors 700 are arranged in parallel.

[0050] Specifically, the plurality of ESD protectors 700 are arranged in parallel and are respectively connected to the HDMI interface 600 and the HDMI splitter 300. The plurality of ESD protectors 700 are used to prevent electrostatic discharge (ESD) from damaging the HDMI interface 600 and the HDMI splitter 300. Each ESD protector 700 can clamp and disperse electrostatic pulses without damaging the signal quality, protect the signals received from the HDMI interface 600, and prevent electrostatic pulses from damaging the HDMI splitter 300 and its subsequent circuits. Arranging a plurality of ESD protectors 700 in parallel can improve the reliability and stability of the system and ensure that users can obtain a good viewing experience when using the split-screen system.

[0051] By arranging a plurality of ESD protectors 700 in parallel, it is ensured that the HDMI interface 600 and the splitter 200 are not damaged by static electricity. Connecting a plurality of ESD protectors 700 in parallel helps to maintain the stability of the HDMI signal and reduce the risk of signal loss or damage.

[0052] In some embodiments, the HDMI-based split screen system includes a Schottky diode 800. One end of the Schottky diode 800 is connected to a power supply, and the other end of the Schottky diode 800 is connected to the HDMI interface 600.

[0053] Specifically, the Schottky diode 800 has a fast response time and a low forward voltage drop, and can effectively clamp voltage overshoot and transient voltage. The Schottky diode 800 is used to protect the HDMI interface 600 from surge voltage and electrostatic discharge (ESD) on the power line. For example, one end of the Schottky diode 800 is connected to the power supply, and the other end is connected to the HDMI interface 600. The Schottky diode 800 can form a protection barrier between the power supply and the HDMI interface 600 to prevent the surge voltage and ESD events on the power line from damaging the HDMI interface 600 and the devices connected thereto.

[0054] It should be noted that selecting an appropriate Schottky diode 800 is very important to ensure that it can effectively protect the HDMI interface 600, and parameters such as its clamping voltage, forward current, breakdown voltage, and surge energy absorption capacity need to be considered.

[0055] The Schottky diode 800 can provide additional protection measures. By using the Schottky diode 800, it can prevent power fluctuations from damaging the HDMI interface 600, thereby improving the stability and durability of the interface.

[0056] In some embodiments, the HDMI splitter 300 includes a splitter chip 310 and a first filter circuit 320. The splitter chip 310 is respectively connected to one end of the connector 200, the audio module 500, the HDMI interface 600, and the first filter circuit 320, and the other end of the first filter circuit 320 is grounded.

[0057] Specifically, the splitter chip 310 is used to process HDMI signals and split a single HDMI signal into two or more paths for transmission to different display devices respectively. The first filter circuit 320 is connected to the splitter chip 310 and is used to filter out noise and interference in the signal to improve the quality of the output signal. The audio module 500 is used to process the audio signal transmitted simultaneously with the HDMI signal, such as separating, amplifying, or adjusting the audio signal to adapt to different audio devices. For example, the splitter chip 310 is respectively connected to one end of the connector 200, the audio module 500, the HDMI interface 600, and the first filter circuit 320, and the other end of the first filter circuit 320 is grounded to provide a safe and reliable reference potential.

[0058] By using the splitter chip 310 and the first filter circuit 320, signal interference and electromagnetic leakage can be effectively reduced, the anti-interference ability of the system can be improved, system failures caused by external electromagnetic interference can be reduced, and the purity of the HDMI signal can be maintained.

[0059] In some embodiments, the HDMI splitter 300 includes a second capacitive reactance circuit 330. One end of the second capacitive reactance circuit 330 is connected to the ESD protector 700, and the other end of the second capacitive reactance circuit 330 is connected to the splitter chip 310.

[0060] Specifically, the second capacitive reactance circuit 330 is used to filter out high-frequency noise and interference in the signal and improve the quality of the output signal. The second capacitive reactance circuit 330 is composed of components such as capacitors or inductors and can be designed with different frequency response characteristics according to needs. The ESD protector 700 is used to prevent electrostatic discharge (ESD) from damaging the HDMI splitter 300 and its subsequent circuits. The ESD protector 700 can clamp and disperse electrostatic pulses without damaging the signal quality. For example, one end of the second capacitive reactance circuit 330 is connected to the ESD protector 700, and the other end is connected to the splitter chip 310. The second capacitive reactance circuit 330 can form a filtering barrier between the ESD protector 700 and the splitter chip 310 to prevent high-frequency noise and interference in the signal from affecting the splitter chip 310 and its subsequent circuits.

[0061] The second capacitive reactance circuit 330 can provide an additional protection measure to prevent the ESD protector 700 from generating an excessive voltage on the splitter chip 310 when absorbing static electricity, thereby protecting the splitter chip 310 from damage.

[0062] In some embodiments, the audio module 500 includes an audio DAC chip 510 and a second impedance circuit 520. The second impedance circuit 520 is respectively connected to the audio DAC chip 510 and the HDMI splitter 300.

[0063] Specifically, the audio DAC chip 510 is used for decoding and digital-to-analog conversion of digital audio signals, converting digital audio signals into analog signals for subsequent amplification and processing. The second impedance circuit 520 is used to match the impedance between the audio DAC chip 510 and the HDMI splitter 300 to ensure the effective transmission of signals and prevent signal reflection. The HDMI splitter 300 is used to process HDMI signals and split a single HDMI signal into two or more paths for transmission to different display devices respectively. For example, the second impedance circuit 520 is respectively connected to the audio DAC chip 510 and the HDMI splitter 300. The second impedance circuit 520 can form an impedance matching barrier between the audio DAC chip 510 and the HDMI splitter 300 to ensure the effective transmission of signals and prevent signal reflection.

[0064] The audio DAC chip 510 can process multiple audio formats, ensuring that the audio module can be compatible with different audio devices. The introduction of the second impedance circuit 520 can achieve impedance matching between the audio DAC chip 510 and the HDMI splitter 300, reducing signal reflection and loss, thereby improving the quality and clarity of the audio signal.

[0065] In some embodiments, the audio module 500 includes a second filtering circuit 530. One end of the second filtering circuit 530 is connected to the audio DAC chip 510, and the other end of the second filtering circuit 530 is connected to the audio signal output terminal.

[0066] Specifically, the second filtering circuit 530 is used to filter out noise and interference in the audio signal, improving the quality of the audio output signal. The second filtering circuit 530 is a low-pass filter composed of components such as capacitors and inductors, allowing the frequency components of the audio signal to pass through while suppressing high-frequency noise. The audio signal output terminal outputs the processed audio signal, which is connected to an audio amplifier or other audio devices. For example, if one end of the second filtering circuit 530 is connected to the audio DAC chip 510 and the other end is connected to the audio signal output terminal, the second filtering circuit 530 can form a noise filtering barrier between the audio DAC chip 510 and the audio signal output terminal, preventing noise and interference in the audio signal from affecting the output signal.

[0067] By using the second filtering circuit 530, the noise and interference in the audio signal can be effectively reduced, improving the purity of the audio signal and providing a better auditory experience for users.

[0068] The embodiment of the present application also provides a split-screen device based on HDMI. The split-screen device based on HDMI includes the HDMI-based split-screen system according to any one of the above.

[0069] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions required to be protected by the present application.

Claims

1. A split-screen system based on HDMI, characterized in that: The HDMI-based split-screen system includes: a step-down module, a connector, an HDMI splitter, a USB-HUB, an audio module and two HDMI interfaces, the HDMI splitter is respectively connected to the audio module and the two HDMI interfaces, and the connector is respectively connected to the step-down module, the USB-HUB and the HDMI splitter; wherein the step-down module is used to convert the input alternating current into a steady-state voltage, and when a split-screen signal is obtained, the connector controls the HDMI splitter, transmits the split-screen signal to the two HDMI interfaces, and transmits data to the audio module.

2. The HDMI-based split-screen system according to claim 1, characterized in that: The buck module includes a TR buck regulator and a first capacitive reactance circuit, one end of the TR buck regulator is connected to the input alternating current, the other end of the TR buck regulator is connected to one end of the first capacitive reactance circuit, and the other end of the first capacitive reactance circuit is grounded.

3. The HDMI-based split-screen system according to claim 1, characterized in that: The HDMI-based split-screen system includes an ESD protector, and the ESD protector is respectively connected to the HDMI interface and the HDMI splitter.

4. The HDMI-based split-screen system according to claim 3, characterized in that: The HDMI-based split-screen system includes a plurality of the ESD protectors, and the plurality of the ESD protectors are arranged in parallel.

5. The HDMI-based split-screen system according to claim 3, characterized in that: The HDMI-based split-screen system includes a Schottky diode, one end of the Schottky diode is connected to a power source, and the other end of the Schottky diode is connected to the HDMI interface.

6. The HDMI-based split-screen system according to claim 3, characterized in that: The HDMI splitter includes a splitter chip and a first filter circuit. The splitter chip is respectively connected to the connector, the audio module, the HDMI interface and one end of the first filter circuit, and the other end of the first filter circuit is grounded.

7. The HDMI-based split-screen system according to claim 6, characterized in that: The HDMI splitter includes a second capacitive reactance circuit, one end of the second capacitive reactance circuit is connected to the ESD protector, and the other end of the second capacitive reactance circuit is connected to the splitter chip.

8. The HDMI-based split-screen system according to claim 1, characterized in that: The audio module includes an audio DAC chip and a second impedance circuit, and the second impedance circuit is connected to the audio DAC chip and the HDMI splitter respectively.

9. The HDMI-based split-screen system according to claim 8, characterized in that: The audio module includes a second filter circuit, one end of the second filter circuit is connected to the audio DAC chip, and the other end of the second filter circuit is connected to the audio signal output end.

10. A split-screen device based on HDMI, characterized in that: The HDMI-based screen splitting device comprises the HDMI-based screen splitting system described in any one of claims 1-9.

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