Display device and image display method of display device

Abstract

The application provides an embodiment belonging to the LED all-in-one machine display device technology, and provides an LED all-in-one machine display device and an image display method of a display device. The display device comprises a display screen, the display screen is spliced by multiple display modules, a high-definition multimedia interface (HDMI) is used for acquiring audio and video signals emitted by a signal source and converting the audio and video signals into a first HDMI signal. A processor is connected with the high-definition multimedia interface and is used for decomposing the first HDMI signal to obtain a second HDMI signal. The display module at least comprises a first display module and a second display module, the first display module and the second display module are connected through an unshielded twisted pair (UTP) network cable, and the second HDMI signal is transmitted from the first display module to the second display module through the unshielded twisted pair (UTP) network cable. The application reduces the complex signal conversion required by the network protocol, and improves the convenience of the signal transmission process.

Description

Technical Field

[0001] This application relates to display device technology. More specifically, it relates to a display device and a method for displaying images on the display device. Background Technology

[0002] Display devices are multifunctional displays that are widely used in meeting or training scenarios due to their advantages such as small footprint and low energy consumption.

[0003] In existing technologies, the transmission of signals between multiple display modules in traditional LED display devices is based on network protocols, such as Transmission Control Protocol (TCP). The display modules are used to generate the displayed images.

[0004] However, most display devices use the HDMI high-definition multimedia interface, which requires complex conversion between network protocols and HDMI protocols to transmit signals, making the signal transmission process cumbersome and complicated. Summary of the Invention

[0005] This application provides a display device and an image display method for the display device, which solves the problem in the prior art that the signal transmission process is cumbersome and complicated because it requires complex conversion between network protocols and HDMI protocols.

[0006] In a first aspect, embodiments of this application provide a display device, including:

[0007] The display screen is composed of multiple display modules spliced ​​together.

[0008] The high-definition multimedia interface (HDMI) is used to acquire audio and video signals emitted by a signal source and convert the audio and video signals into a first HDMI signal.

[0009] A processor connected to the high-definition multimedia interface (HDMI) is configured to decompose the first HDMI signal into one or more HDMI signals to obtain a second HDMI signal.

[0010] The display module includes at least a first display module and a second display module, which are connected by an unshielded twisted pair UTP cable. The second HDMI signal is transmitted from the first display module to the second display module through the unshielded twisted pair UTP cable.

[0011] In this application, the processor obtains the second HDMI signal and sends the second HDMI signal from the first display module to the second display module. The display modules are cascaded through unshielded twisted pair UTP network cables, which improves the convenience of the signal transmission process.

[0012] In some embodiments of this application, the display module includes an HDMI receiver and an HDMI transmitter;

[0013] The second HDMI signal is transmitted from the HDMI transmitter of the first display module to the HDMI receiver of the second display module based on the HDMI proprietary protocol;

[0014] The pins of the HDMI transmitter and HDMI receiver corresponding to the HDMI proprietary protocol include: TMDS data 1+ pin, TMDS data 1- pin, TMDS date 2+ pin, TMDS data 2- pin, TMDS data 0+ pin, TMDS data 0- pin, TMDS clock+ pin, and TMDS clock- pin.

[0015] In this application, the second HDMI signal is transmitted from the HDMI transmitter of the first display module to the HDMI receiver of the second display module through the HDMI proprietary protocol, which reduces the complex conversion between the network protocol and the HDMI protocol required for signal transmission using the network protocol and improves the signal transmission efficiency.

[0016] In some embodiments of this application, when the HDMI receiver of the second display module is used to receive the second HDMI signal sent by the first display module, it is specifically used for:

[0017] The HDMI receiver of the second display module receives the second HDMI signal sent by the first display module through Minimized Transmission Differential Signal TMDS channel 0, Minimized Transmission Differential Signal TMDS channel 1 and Minimized Transmission Differential Signal TMDS channel 2 respectively.

[0018] In this application, the transmission efficiency of the second HDMI signal is improved by minimizing the transmission of differential signal TMDS channel 0, TMDS channel 1 and TMDS channel 2.

[0019] In some embodiments of this application, the minimized transmission differential signal TMDS channel 0 is composed of the TMDS data 0+ pin and the TMDS data 0- pin;

[0020] The minimized transmission differential signal TMDS channel 1 is composed of the TMDS data 1+ pin and the TMDS data 1- pin;

[0021] The minimized transmission differential signal TMDS channel 2 consists of the TMDS date 2+ pin and the TMDS data 2- pin.

[0022] In this application, the HDMI receiver and HDMI transmitter include TMDS data 1+ pin, TMDS data 1- pin, TMDS date 2+ pin, TMDS data 2- pin, TMDS data 0+ pin, and TMDS data 0- pin, which reduces the number of pins in existing HDMI receivers and HDMI transmitters and saves pin resources.

[0023] In some embodiments of this application, the TMDS clock+ pin and the TMDS clock- pin constitute a TMDS clock channel;

[0024] The TMDS clock channel is configured to uniformly transmit the timing required for the second HDMI signal when transmitting the second HDMI signal.

[0025] In this application, the HDMI receiver and HDMI transmitter also include a TMDS clock+ pin and a TMDS clock- pin, which reduces the number of pins in existing HDMI receivers and HDMI transmitters and saves pin resources.

[0026] In some embodiments of this application, the circuit of the display module includes an HDMI transmitter circuit and an HDMI receiver circuit;

[0027] The HDMI transmitter circuit is connected to the HDMI receiver circuit via a first capacitor and a second capacitor, respectively.

[0028] In this application, an HDMI transmitter and an HDMI receiver are connected by a first capacitor and a second capacitor, thereby enabling the transmission of HDMI signals between the HDMI transmitter and the HDMI receiver.

[0029] In some embodiments of this application, the HDMI transmitter circuit includes a first power supply, a first resistor, a second resistor, a first switch, and a second switch;

[0030] The first end of the first resistor is connected to the first power source, and the second end of the first resistor is connected to the first end of the first switch.

[0031] The first end of the second resistor is connected to the first power source, and the second end of the second resistor is connected to the first end of the second switch;

[0032] The second terminal of the first switch is grounded;

[0033] The second terminal of the second switch is grounded;

[0034] The first terminal of the first capacitor is connected between the second terminal of the first resistor and the first terminal of the first switch;

[0035] The first end of the second capacitor is connected between the second end of the second resistor and the first end of the second switch.

[0036] In this application, the stability of the HDMI transmitter circuit is improved by adding a first power supply, a first resistor, and a second resistor.

[0037] In some embodiments of this application, the HDMI receiver circuit includes a second power supply, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a third capacitor, and an operational amplifier;

[0038] The second terminal of the first capacitor is connected to the first terminal of the operational amplifier;

[0039] The second terminal of the second capacitor is connected to the second terminal of the operational amplifier;

[0040] The first end of the third resistor is connected to the second power supply, and the second end of the third resistor is connected to the first end of the fourth resistor;

[0041] The second terminal of the fourth resistor is grounded;

[0042] The first terminal of the third capacitor is connected to the second power supply, and the second terminal of the third capacitor is connected to the first terminal of the fifth resistor.

[0043] The second end of the fifth resistor is connected between the second end of the second capacitor and the second end of the operational amplifier;

[0044] The first end of the sixth resistor is connected between the second end of the third capacitor and the first end of the fifth resistor;

[0045] The second terminal of the sixth resistor is connected between the second terminal of the first capacitor and the first terminal of the operational amplifier. In this application, the stability of the HDMI receiver circuit is improved by adding a third resistor, a fourth resistor, and a third capacitor.

[0046] In some embodiments of this application, when the first switch is closed, the first power supply forms a current path with the first resistor and the first switch, and the voltage at the point between the second end of the first resistor and the first end of the first switch is the first voltage.

[0047] When the second switch is open, the first power supply forms a current-disconnected circuit with the second resistor and the second switch, and the voltage at the point between the second end of the second resistor and the first end of the second switch is the second voltage.

[0048] The operational amplifier is used to obtain a voltage difference based on the first voltage and the second voltage, and to generate a differential signal based on the voltage difference, the differential signal being used to characterize the second HDMI signal.

[0049] In this application, by sending the voltage difference to the operational amplifier, the operational amplifier can generate a differential signal based on the voltage difference, thereby realizing the transmission of the second HDMI signal.

[0050] In some embodiments of this application, the third resistor, the fourth resistor, the fifth resistor, and the sixth resistor are used to provide a bias voltage for the operational amplifier. The bias voltage is used to enable the operational amplifier to operate normally so that the operational amplifier obtains the voltage difference based on the first voltage and the second voltage.

[0051] In this application, by providing a bias voltage to the operational amplifier, the operational amplifier can be made to work normally, thereby improving the stability of the operational amplifier's operation and enabling the HDMI receiver to receive the second HDMI signal.

[0052] In some embodiments of this application, the high-definition multimedia interface (HDMI) is connected to the signal source via an HDMI cable.

[0053] In this application, an HDMI cable is used to connect an HDMI interface to a signal source, which facilitates the HDMI interface in acquiring audio and video signals emitted by the signal source.

[0054] Secondly, embodiments of this application provide an image display method for a display device, including:

[0055] The High Definition Multimedia Interface (HDMI) acquires audio and video signals emitted by the signal source and converts the audio and video signals into a first HDMI signal.

[0056] The processor decomposes the first HDMI signal into one or more HDMI signals to obtain the second HDMI signal;

[0057] The display screen generates a display image based on the second HDMI signal.

[0058] In this application, the transmission efficiency of the signal is improved by converting the audio and video signals into HDMI signals for transmission. Attached Figure Description

[0059] To more clearly illustrate the implementation methods in the embodiments of this application or related technologies, 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.

[0060] Figure 1 A schematic diagram of the physical structure of an HDMI device is provided in this application;

[0061] Figure 2 A circuit diagram of a display module provided in this application;

[0062] Figure 3 A schematic diagram of the structure of a display device provided in this application;

[0063] Figure 4 This application provides a schematic diagram of the structure of a display module;

[0064] Figure 5 A schematic diagram of the physical structure of an HDMI device is provided in this application;

[0065] Figure 6 A circuit diagram of yet another display module provided in this application;

[0066] Figure 7 This is a schematic diagram of the structure of an HDMI transmitter circuit provided in an embodiment of this application;

[0067] Figure 8 This is a schematic diagram of the structure of an HDMI receiver circuit provided in an embodiment of this application;

[0068] Figure 9 A schematic diagram of the circuit structure of another display module provided in this application;

[0069] Figure 10 This is a flowchart illustrating an image display method for a display device provided in this application. Detailed Implementation

[0070] 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.

[0071] 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.

[0072] Furthermore, the terms “comprising” 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 that are explicitly listed, but may include other components that are not explicitly listed or that are inherent to such product or device.

[0073] The display device provided in this application can have various implementation forms. Taking LED display device as an example, it can be a smart conference tablet, a touch all-in-one machine, an electronic whiteboard, etc. By displaying text, images and video information with LED pixels, it provides functions including but not limited to playback, information release, power management, human-computer interaction, and wireless screen projection.

[0074] LED displays are widely used in command centers, studios, and many other fields due to their low energy consumption, high brightness, long lifespan, and good performance stability. In recent years, with the rapid development of LED display technology, display devices have emerged.

[0075] In existing technologies, traditional LED display devices contain multiple display modules. When signals are transmitted between these modules, they are typically transmitted from the HDMI transmitter of the current display module to the HDMI receiver of the next display module based on a network protocol. The display modules then generate the displayed image based on the transmitted signal. The network protocol can be, for example, Transmission Control Protocol (TCP). However, most display devices use the HDMI high-definition multimedia interface. Transmitting signals using a network protocol requires complex conversion between the network protocol and the HDMI protocol, making the signal transmission process cumbersome and complicated.

[0076] Currently, both the HDMI receiver 01 and HDMI transmitter 02 in the display module contain 19 pins, as shown in Table 1. The 19 pins are as follows:

[0077] Table 1

[0078]

[0079]

[0080] Among them, pins 7-9 form the Minimum Transmission Differential Signal TMDS Channel 0 (100), pins 4-6 form the Minimum Transmission Differential Signal TMDS Channel 1 (101), pins 1-3 form the Minimum Transmission Differential Signal TMDS Channel 2 (102), and pins 10-12 form the Minimum Transmission Differential Signal TMDS Clock Channel (103).

[0081] Minimized Transmission Differential Signal TMDS Channel 0 (100), Minimized Transmission Differential Signal TMDS Channel 1 (101) and Minimized Transmission Differential Signal TMDS Channel 2 (102) are used to transmit the signal of the current display module to the next display module. The transmitted signal includes, but is not limited to, audio signal L1, video signal L2, control signal and status signal L3.

[0082] Pin 13 is a consumer electronics control pin, similar to an extended HDMI function, used to customize HDMI messages and generate consumer electronics control lines (104).

[0083] Pin 14 is a reserved pin used to detect whether the device is running, generating an optional reserved function line (105).

[0084] Pins 15 and 16 are primarily used to support the DDC function, read the display device EDID, and generate the display data DDC channel (106). Pin 17 is used for grounding.

[0085] Pin 18 is used to connect to the power supply.

[0086] Pin 19 is a hot-swappable pin. When the interface is connected, the presence of the device can be determined by the level. It is used to generate a hot-swappable dedicated line (107).

[0087] In summary, we have obtained the following results: Figure 1 The physical structure of HDMI shown is as follows. Figure 1 This is a schematic diagram of the physical structure of an HDMI device provided in this application.

[0088] The circuitry of the HDMI receiver 01 and HDMI transmitter 02 in the display module is as follows: Figure 2 As shown, Figure 2 A circuit diagram of a display module provided in this application.

[0089] exist Figure 2 In the HDMI transmitter 02, there is a first switch 21 and a second switch 22, and the HDMI receiver includes a power supply 23, a first resistor 24, a second resistor 25 and an operational amplifier 26.

[0090] The first terminal of the first switch 21 is connected to the first terminal of the operational amplifier 26, and the second terminal of the first switch 21 is grounded.

[0091] The first terminal of the second switch 22 is connected to the second terminal of the operational amplifier 26, and the second terminal of the second switch 22 is grounded.

[0092] The first end of the first resistor 24 is connected to the power supply 23, and the second end of the first resistor 24 is connected between the second end of the second switch 22 and the second end of the operational amplifier 26.

[0093] The first end of the second resistor 25 is connected to the power supply 23, and the second end of the second resistor 25 is connected between the first end of the first switch and the first end of the operational amplifier 26.

[0094] The principle is as follows: the first end of the first switch 21 is connected to the first end of the operational amplifier 26 to form the first channel M1, the first end of the second switch 22 is connected to the second end of the operational amplifier 26 to form the second channel M2, and the third channel M3 is the ground connection between the HDMI transmitter 02 and the HDMI receiver 01.

[0095] The HDMI transmitter 02 is driven by a 10mA constant current source to drive a pair of differential signals. The HDMI receiver 01 needs to pull the differential signals up to 3.3V through the first resistor 24 and the second resistor 25 (50Ω pull-up resistors). Since the HDMI receiver 01 has a high impedance input, almost all the drive current (10mA) passes through the 3.3V resistor to the pull-up resistor and then to the HDMI transmitter 02, generating a voltage of 500mV (10mA * 50Ω = 500mV) across the pull-up resistor. Figure 2 As can be seen from the circuit, one line is switched on, with a voltage of 2.8V relative to ground (3.3V - 500MV = 2.8V), while the other line is switched off, with a voltage of 3.3V relative to ground. When the state of the HDMI transmitter 02 driver reverses, the direction of the current flowing through the matching resistor changes, resulting in a high / low logic state change in the HDMI receiver 01. This means that the HDMI receiver 01 generates a differential swing of -500mV to +500mV, resulting in a DC bias of 2.8V.

[0096] It should be noted that the circuit described above requires a third channel M3, i.e., a ground wire, to connect the HDMI receiver 01 and the HDMI transmitter 02. However, there is no ground wire in a UTP cable. Therefore, this circuit cannot use an unshielded twisted pair (UTP) cable.

[0097] Therefore, to address the aforementioned technical problems in the prior art, this application proposes a display device and an image display method for the display device. In this method, display modules within the display device transmit HDMI signals from the HDMI transmitter of the first display module to the HDMI receiver of the second display module based on the HDMI proprietary protocol. The display modules are cascaded via unshielded twisted-pair (UTP) network cables. The pins of the HDMI transmitter and receiver corresponding to the HDMI proprietary protocol include: TMDS data 1+ pin, TMDS data 1- pin, TMDS date 2+ pin, TMDS data 2- pin, TMDS data 0+ pin, TMDS data 0- pin, TMDS clock+ pin, and TMDS clock- pin. The display device of this application primarily uses the High-Definition Multimedia Interface (HDMI) and directly transmits HDMI signals via the HDMI proprietary protocol. This reduces the complex signal conversion between network protocols and HDMI protocols required for network protocol signal transmission, thus improving the convenience of the signal transmission process.

[0098] 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.

[0099] Figure 3 A schematic diagram of the structure of a display device provided in this application is shown below. Figure 3 As shown, the display device 30 includes: a high-definition multimedia interface HDMI 301, a processor 302, and a display screen 303, wherein the display screen 303 is formed by splicing together multiple display modules 304.

[0100] The connection relationship can be as follows: the high-definition multimedia interface HDMI301 is connected to the processor 302, the processor 302 is connected to the display screen 303, wherein the display screen 303 is composed of multiple display modules 304 spliced ​​together.

[0101] Specifically, the processor 302 is connected to the first display module 304, the first display module 304 is connected to the second display module 304, the second display module 304 is connected to the third display module 304, and so on until it is connected to the last display module 304.

[0102] Among them, the high-definition multimedia interface HDMI301 is used to acquire audio and video signals emitted by the signal source and convert the audio and video signals into the first HDMI signal.

[0103] The signal source can be a device capable of emitting audio and video, such as a DVD player or personal computer. The HDMI 301 is a fully digital video and audio transmission interface capable of sending audio and video signals.

[0104] In this embodiment, the signal source and the high-definition multimedia interface HDMI 301 can be connected via an HDMI cable, so that the HDMI 301 can acquire the audio and video signals from the signal source and convert them into a first HDMI signal.

[0105] The processor 302 is connected to the high-definition multimedia interface HDMI 301. The processor 302 is used to decompose the first HDMI signal into one or more HDMI signals to obtain a second HDMI signal.

[0106] In this embodiment, the processor 302 may be an integrated ASIC, a field-programmable gate array (FPGA), or the like.

[0107] The processor 302 can decompose the first HDMI signal into one or more HDMI signals according to the screen resolution of the display device 30 to obtain the second HDMI signal.

[0108] If it is split into one HDMI signal, then one HDMI signal is transmitted between multiple display modules 304, and each display module 304 receives the same signal.

[0109] If the signal is split into multiple HDMI signals, such as two, the first HDMI signal can be transmitted between multiple display modules 304 in the first channel, and each display module 304 receives the same signal in the first channel. The second HDMI signal can be transmitted between multiple display modules 304 in the second channel, and each display module 304 receives the same signal in the second channel.

[0110] It is understood that the above examples are for illustrative purposes only and are not intended to limit this application.

[0111] Display module 304 includes at least a first display module 304 and a second display module 304. When the second HDMI signal is transmitted among the multiple display modules 304, it is transmitted from the first display module 304 to the second display module 304.

[0112] The first display module 304 and the second display module 304 are cascaded via an unshielded twisted-pair UTP network cable to transmit the second HDMI signal.

[0113] Display module 304 includes an HDMI receiver and an HDMI transmitter. When the second HDMI signal is transmitted between multiple display modules 304, one possible implementation is that the signal is sent from the HDMI transmitter of the first display module 304 to the HDMI receiver of the second display module 304 based on the HDMI proprietary protocol.

[0114] The pins for the HDMI transmitter and HDMI receiver corresponding to the HDMI proprietary protocol include: TMDS data 1+ pin, TMDS data 1- pin, TMDS date 2+ pin, TMDS data 2- pin, TMDS data 0+ pin, TMDS data 0- pin, TMDS clock+ pin, and TMDS clock- pin.

[0115] In this embodiment, the number of display modules 304 is not limited, and can be determined according to the type of display device 30.

[0116] Based on the HDMI proprietary protocol, the second HDMI signal is transmitted from the first display module 304 (the current display module) to the second display module 304 (the next display module), so that each display module 304 can generate a display image based on the second HDMI signal.

[0117] Using the HDMI protocol, taking HDMI 2.1FRL as an example, the total bandwidth can reach up to 48Gbps, enabling 8K@60Hz and 4K@120Hz transmission, which is beneficial for all-in-one machine design. By splitting the image, the bandwidth can be reduced (e.g., to achieve 2K@60Hz, 16-bit depth, bandwidth is approximately 6.7Gbps).

[0118] In order to improve the cascading reliability between display modules 304 in display device 30, this embodiment simplifies the existing HDMI protocol and obtains a proprietary HDMI protocol. The number of pins in the simplified version is reduced from 19 in Table 1 to 8 in Table 2 of the following embodiment.

[0119] At the physical layer of the protocol, unshielded twisted-pair UTP network cables are used for cascading between display modules 304, further improving the reliability of the cascading.

[0120] In this embodiment, multiple display modules 304 are spliced ​​together to form a display screen 303 to display images.

[0121] In the above embodiments of this application, the display device 30 includes a display screen 303, which is composed of multiple display modules 304 spliced ​​together. It also includes an HDMI 301, which is used to acquire audio and video signals emitted by a signal source and convert them into a first HDMI signal. It further includes a processor 302 connected to the HDMI 301, which is used to decompose the first HDMI signal into one or more HDMI signals to obtain a second HDMI signal. The display modules include at least a first display module 304 and a second display module 304, which are connected via an unshielded twisted-pair (UTP) network cable. The second HDMI signal is transmitted from the first display module 304 to the second display module 304 via the unshielded twisted-pair (UTP) network cable. The display device 30 of this embodiment directly transmits HDMI signals using the HDMI proprietary protocol, reducing the complex signal conversion between network protocols and HDMI protocols required for transmitting signals using network protocols, and improving the convenience of the signal transmission process.

[0122] Furthermore, based on the above embodiments, the structural composition of module 304 will be described in detail through the following embodiments. Figure 4 This application provides a schematic diagram of the structure of a display module, such as... Figure 4 As shown, it includes: HDMI receiver 401 and HDMI transmitter 402.

[0123] The HDMI transmitter 402 of the first display module 304 is used to send a second HDMI signal to the HDMI receiver 401 of the second display module 304.

[0124] The HDMI receiver 401 of the second display module 304 is used to receive the second HDMI signal sent by the HDMI transmitter 402 of the first display module 304.

[0125] The HDMI receiver 401 of the second display module 304 receives the second HDMI signal sent by the first display module 304 through the Minimized Transmission Differential Signal TMDS channel 0, the Minimized Transmission Differential Signal TMDS channel 1, and the Minimized Transmission Differential Signal TMDS channel 2, respectively.

[0126] In this embodiment, the HDMI receiver 401 and HDMI transmitter 402 in the display module 304 each have 8 pins, as shown in Table 2. The 8 pins are as follows:

[0127] Table 2

[0128] HDMI pin number Signal (English) Signal (Chinese) 1 TMDSDate2+ TMDS Date 2+ 2 TMDSDate2- TMDS Data 2- 3 TMDSDate1+ TMDS data 1+ 4 TMDSDate1- TMDS Data 1- 5 TMDSDate0+ TMDS data 0+ 6 TMDSDate0- TMDS data 0- 7 TMDS Clock+ TMDS clock+ 8 TMDS Clock- TMDS clock -

[0129] Pins 5-6 form the Minimum Transmission Differential Signal TMDS Channel 0 (100), pins 3-4 form the Minimum Transmission Differential Signal TMDS Channel 1 (101), pins 1-2 form the Minimum Transmission Differential Signal TMDS Channel 2 (102), and pins 7-8 form the Minimum Transmission Differential Signal TMDS Clock Channel (103). The TMDS Clock Channel is configured to unify the timing required for transmitting the second HDMI signal.

[0130] Minimized transmission differential signal TMDS channel 0 (100), minimized transmission differential signal TMDS channel 1 (101) and minimized transmission differential signal TMDS channel 2 (102) are used to transmit the second HDMI signal of the current display module to the next display module. The transmitted signals include, but are not limited to, audio signal L1, video signal L2, control signal and status signal L3.

[0131] It's important to note that the reason HDMI's original 19 pins were simplified to the current 8 pins is because unshielded twisted-pair (UTP) network cables only have 8 wires, or 8 pins. Therefore, the simplified configuration results in... Figure 5 The physical structure of HDMI shown is as follows. Figure 5 This is a schematic diagram of the physical structure of an HDMI device provided in this application.

[0132] In this embodiment, the circuits of the HDMI receiver 401 and HDMI transmitter 402 in the display module 304 are as follows: Figure 6 As shown, Figure 6 A circuit diagram of another display module 304 provided in this application.

[0133] exist Figure 6 In the display module, the circuit includes an HDMI transmitter circuit 601 and an HDMI receiver circuit 602. The HDMI transmitter circuit 601 is connected to the HDMI receiver circuit 602 through a first capacitor 603 and a second capacitor 604.

[0134] Figure 7 The schematic diagram of an HDMI transmitter circuit provided in this application embodiment includes: a first power supply 701, a first resistor 702, a second resistor 703, a first switch 704, and a second switch 705.

[0135] The connection relationship can be:

[0136] The first end of the first resistor 702 is connected to the first power supply 701, and the second end of the first resistor 702 is connected to the first end of the first switch 704.

[0137] The first end of the second resistor 703 is connected to the first power supply 701, and the second end of the second resistor 703 is connected to the first end of the second switch 704.

[0138] The second terminal of the first switch 704 is grounded.

[0139] The second terminal of the second switch 704 is grounded.

[0140] The first terminal of the first capacitor 603 is connected between the second terminal of the first resistor 702 and the first terminal of the first switch 704.

[0141] The first terminal of the second capacitor 604 is connected between the second terminal of the second resistor 703 and the first terminal of the second switch 704.

[0142] Figure 8 A schematic diagram of an HDMI receiver circuit 602 provided in an embodiment of this application includes: a second power supply 801, a third resistor 802, a fourth resistor 803, a fifth resistor 804, a sixth resistor 805, a third capacitor 806, and an operational amplifier 807.

[0143] The connection relationship can be:

[0144] The second terminal of the first capacitor 603 is connected to the first terminal of the operational amplifier 807.

[0145] The second terminal of the second capacitor 604 is connected to the second terminal of the operational amplifier 807.

[0146] The first end of the third resistor 802 is connected to the second power supply 801, and the second end of the third resistor 802 is connected to the first end of the fourth resistor 803.

[0147] The second terminal of the fourth resistor 803 is grounded.

[0148] The first terminal of the third capacitor 806 is connected to the second power supply 801, and the second terminal of the third capacitor 806 is connected to the first terminal of the fifth resistor 804.

[0149] The second terminal of the fifth resistor 804 is connected between the second terminal of the second capacitor 604 and the second terminal of the operational amplifier 807.

[0150] The first end of the sixth resistor 805 is connected between the second end of the third capacitor 806 and the first end of the fifth resistor 804.

[0151] The second terminal of the sixth resistor 805 is connected between the second terminal of the first capacitor 603 and the first terminal of the operational amplifier 807.

[0152] The principle is as follows: Assuming the voltage provided by the first power supply 701 is 3.3V and the constant current source is 10mA, when the first switch 704 is closed, the first power supply 701, the first resistor 702 (50Ω), and the first switch 704 form a current path. The voltage between the second end of the first resistor 702 and the first end of the first switch 704 is a first voltage of 2.8V (3.3V-10mA*50Ω=2.8V). When the second switch 705 is open, the first power supply 701, the second resistor 703 (50Ω), and the second switch 705 generate a current break. The voltage between the second end of the second resistor 703 and the first end of the second switch 705 is a second voltage of 3.3V. The operational amplifier obtains a voltage difference of -0.5V based on the first voltage of 2.8V and the second voltage of 3.3V, and generates a differential signal based on this voltage difference. This differential signal is used to characterize the second HDMI signal.

[0153] The final result is as follows Figure 9 The circuit of the display module shown is as follows. Figure 9 A schematic diagram of the circuit structure of another display module provided in this application.

[0154] exist Figure 9 In this configuration, resistors 702 and 703 are impedance matching resistors with a resistance of 50Ω. Resistors 802, 804, 805, and 805 are bias resistors used to provide bias voltage to the operational amplifier 807 in the HDMI receiver, ensuring its proper functioning and differential signal generation. A constant current source of 10–16mA is used for amplitude adjustment of the differential signal. Since there is no ground connection between the HDMI receiver and transmitter (i.e., the third channel M3 mentioned above), only the differential signal output from the HDMI transmitter is received; therefore, a UTP network cable can be used for connection.

[0155] In the above embodiments of this application, by simplifying the physical structure of HDMI to 8 pins, and by improving the structure of the HDMI receiver and HDMI transmitter, HDMI signals can be transmitted between display modules more conveniently and quickly, thereby improving transmission efficiency.

[0156] Furthermore, the application of the display device in this application will be illustrated through the following embodiments. Figure 10 A flowchart illustrating an image display method for a display device provided in this application is shown below. Figure 10 As shown, the method includes the following steps:

[0157] S101: The High-Definition Multimedia Interface (HDMI) acquires audio and video signals emitted by the signal source and converts the audio and video signals into a first HDMI signal.

[0158] The signal source can be a device that can emit audio and video, such as a DVD player or a personal computer.

[0159] S102, The processor decomposes the first HDMI signal into one or more HDMI signals to obtain the second HDMI signal.

[0160] Depending on the screen resolution of the display device, the first HDMI signal is decomposed into one or more HDMI signals to obtain the second HDMI signal.

[0161] S103, The display screen generates a display image based on the second HDMI signal.

[0162] The display screen is composed of multiple display modules spliced ​​together.

[0163] The image is generated based on the second HDMI signal obtained in step S112.

[0164] For the specific implementation process, please refer to the aforementioned embodiments; this embodiment will not repeat the details here.

[0165] In the above embodiments of this application, the audio and video signals emitted by the signal source are obtained through the high-definition multimedia interface HDMI. The processor converts the audio and video signals into a first HDMI signal, decomposes the first HDMI signal into one or more HDMI signals to obtain a second HDMI signal, and the display screen generates a display image based on the second HDMI signal, thereby improving the display efficiency of the image.

[0166] This application also provides a computer-readable storage medium, which may include various media capable of storing program code, such as a USB flash drive, a portable hard drive, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk. Specifically, the computer-readable storage medium stores program instructions, which are used for the image display method of the display device in the above embodiments.

[0167] This application also provides a program product including executable instructions stored in a readable storage medium. At least one control module of a display device can read the executable instructions from the readable storage medium, and the at least one control module executes the executable instructions to cause the display device to implement the image display method of the display device provided in the various embodiments described above.

[0168] 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.

[0169] For ease of explanation, the above description has been provided in conjunction with specific embodiments. However, the above exemplary discussion 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 embodiments and various different variations of embodiments suitable for specific application considerations.

Claims

1. A display device, characterized in that, include: The display screen is composed of multiple display modules spliced ​​together. The high-definition multimedia interface (HDMI) is used to acquire audio and video signals emitted by a signal source and convert the audio and video signals into a first HDMI signal. A processor connected to the high-definition multimedia interface (HDMI) is configured to decompose the first HDMI signal into one or more HDMI signals to obtain a second HDMI signal. The display module includes at least a first display module and a second display module. The first display module and the second display module are connected by an unshielded twisted pair UTP network cable. The second HDMI signal is transmitted from the first display module to the second display module through the unshielded twisted pair UTP network cable. The display module includes an HDMI receiver and an HDMI transmitter; the number of pins of the HDMI receiver and the HDMI transmitter is the same as the number of pins of the UTP network cable. The second HDMI signal transmitted from the first display module to the second display module is characterized by a differential signal, and there is no ground connection between the HDMI transmitter of the first display module and the HDMI receiver of the second display module.

2. The display device according to claim 1, characterized in that, The second HDMI signal is transmitted from the HDMI transmitter of the first display module to the HDMI receiver of the second display module based on the HDMI proprietary protocol; The pins of the HDMI transmitter and HDMI receiver corresponding to the HDMI proprietary protocol include: TMDS data 1+ pin, TMDS data 1- pin, TMDS date 2+ pin, TMDS data 2- pin, TMDS data 0+ pin, TMDS data 0- pin, TMDS clock+ pin, and TMDS clock- pin.

3. The display device according to claim 2, characterized in that, When the HDMI receiver of the second display module is used to receive the second HDMI signal sent by the first display module, it is specifically used for: The HDMI receiver of the second display module receives the second HDMI signal sent by the first display module through Minimized Transmission Differential Signal TMDS channel 0, Minimized Transmission Differential Signal TMDS channel 1 and Minimized Transmission Differential Signal TMDS channel 2 respectively.

4. The display device according to claim 3, characterized in that, The minimized transmission differential signal TMDS channel 0 is composed of the TMDS data 0+ pin and the TMDS data 0- pin; The minimized transmission differential signal TMDS channel 1 is composed of the TMDS data 1+ pin and the TMDS data 1- pin; The minimized transmission differential signal TMDS channel 2 consists of the TMDS date 2+ pin and the TMDS data 2- pin.

5. The display device according to claim 4, characterized in that, The TMDS clock+ pin and the TMDS clock- pin constitute the TMDS clock channel; The TMDS clock channel is configured to uniformly transmit the timing required for the second HDMI signal when transmitting the second HDMI signal.

6. The display device according to claim 5, characterized in that, The circuit of the display module includes an HDMI transmitter circuit and an HDMI receiver circuit. The HDMI transmitter circuit is connected to the HDMI receiver circuit via a first capacitor and a second capacitor, respectively.

7. The display device according to claim 6, characterized in that, The HDMI transmitter circuit includes a first power supply, a first resistor, a second resistor, a first switch, and a second switch; The first end of the first resistor is connected to the first power source, and the second end of the first resistor is connected to the first end of the first switch. The first end of the second resistor is connected to the first power source, and the second end of the second resistor is connected to the first end of the second switch; The second terminal of the first switch is grounded; The second terminal of the second switch is grounded; The first terminal of the first capacitor is connected between the second terminal of the first resistor and the first terminal of the first switch; The first end of the second capacitor is connected between the second end of the second resistor and the first end of the second switch.

8. The display device according to claim 7, characterized in that, The HDMI receiver circuit includes a second power supply, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a third capacitor, and an operational amplifier; The second terminal of the first capacitor is connected to the first terminal of the operational amplifier; The second terminal of the second capacitor is connected to the second terminal of the operational amplifier; The first end of the third resistor is connected to the second power supply, and the second end of the third resistor is connected to the first end of the fourth resistor; The second terminal of the fourth resistor is grounded; The first terminal of the third capacitor is connected to the second power supply, and the second terminal of the third capacitor is connected to the first terminal of the fifth resistor. The second end of the fifth resistor is connected between the second end of the second capacitor and the second end of the operational amplifier; The first end of the sixth resistor is connected between the second end of the third capacitor and the first end of the fifth resistor; The second end of the sixth resistor is connected between the second end of the first capacitor and the first end of the operational amplifier.

9. The display device according to claim 8, characterized in that, When the first switch is closed, the first power supply, the first resistor, and the first switch form a current path, and the voltage at the point between the second end of the first resistor and the first end of the first switch is the first voltage. When the second switch is open, the first power supply forms a current-disconnected circuit with the second resistor and the second switch, and the voltage at the point between the second end of the second resistor and the first end of the second switch is the second voltage. The operational amplifier is used to obtain a voltage difference based on the first voltage and the second voltage, and to generate a differential signal based on the voltage difference, the differential signal being used to characterize the second HDMI signal.

10. The display device according to claim 9, characterized in that, The third resistor, the fourth resistor, the fifth resistor, and the sixth resistor are used to provide a bias voltage for the operational amplifier. The bias voltage is used to enable the operational amplifier to operate normally so that the operational amplifier can obtain the voltage difference based on the first voltage and the second voltage.

11. The display device according to any one of claims 1-10, characterized in that, The high-definition multimedia interface (HDMI) is connected to the signal source via an HDMI cable.

12. An image display method for a display device, characterized in that, include: The High Definition Multimedia Interface (HDMI) acquires audio and video signals emitted by the signal source and converts the audio and video signals into a first HDMI signal. The processor decomposes the first HDMI signal into one or more HDMI signals to obtain the second HDMI signal; The display screen generates a display image based on the second HDMI signal. The display screen is composed of multiple display modules, each including at least a first display module and a second display module. The first and second display modules are connected via an unshielded twisted-pair (UTP) network cable. The second HDMI signal is transmitted from the first display module to the second display module via the UTP network cable. Each display module includes an HDMI receiver and an HDMI transmitter. The number of pins in the HDMI receiver and transmitter is the same as the number of pins in the UTP network cable. The second HDMI signal transmitted from the first display module to the second display module is characterized by a differential signal. There is no ground connection between the HDMI transmitter of the first display module and the HDMI receiver of the second display module.

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